From 6aaedb813fa11ba0679c3051bc2eb28646b9506c Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Sat, 30 Aug 2025 16:53:58 -0700 Subject: Update to SDL3 --- src/contrib/SDL-3.2.20/include/SDL3/SDL_gpu.h | 4213 +++++++++++++++++++++++++ 1 file changed, 4213 insertions(+) create mode 100644 src/contrib/SDL-3.2.20/include/SDL3/SDL_gpu.h (limited to 'src/contrib/SDL-3.2.20/include/SDL3/SDL_gpu.h') diff --git a/src/contrib/SDL-3.2.20/include/SDL3/SDL_gpu.h b/src/contrib/SDL-3.2.20/include/SDL3/SDL_gpu.h new file mode 100644 index 0000000..4a5e32f --- /dev/null +++ b/src/contrib/SDL-3.2.20/include/SDL3/SDL_gpu.h @@ -0,0 +1,4213 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2025 Sam Lantinga + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/* WIKI CATEGORY: GPU */ + +/** + * # CategoryGPU + * + * The GPU API offers a cross-platform way for apps to talk to modern graphics + * hardware. It offers both 3D graphics and compute support, in the style of + * Metal, Vulkan, and Direct3D 12. + * + * A basic workflow might be something like this: + * + * The app creates a GPU device with SDL_CreateGPUDevice(), and assigns it to + * a window with SDL_ClaimWindowForGPUDevice()--although strictly speaking you + * can render offscreen entirely, perhaps for image processing, and not use a + * window at all. + * + * Next, the app prepares static data (things that are created once and used + * over and over). For example: + * + * - Shaders (programs that run on the GPU): use SDL_CreateGPUShader(). + * - Vertex buffers (arrays of geometry data) and other rendering data: use + * SDL_CreateGPUBuffer() and SDL_UploadToGPUBuffer(). + * - Textures (images): use SDL_CreateGPUTexture() and + * SDL_UploadToGPUTexture(). + * - Samplers (how textures should be read from): use SDL_CreateGPUSampler(). + * - Render pipelines (precalculated rendering state): use + * SDL_CreateGPUGraphicsPipeline() + * + * To render, the app creates one or more command buffers, with + * SDL_AcquireGPUCommandBuffer(). Command buffers collect rendering + * instructions that will be submitted to the GPU in batch. Complex scenes can + * use multiple command buffers, maybe configured across multiple threads in + * parallel, as long as they are submitted in the correct order, but many apps + * will just need one command buffer per frame. + * + * Rendering can happen to a texture (what other APIs call a "render target") + * or it can happen to the swapchain texture (which is just a special texture + * that represents a window's contents). The app can use + * SDL_WaitAndAcquireGPUSwapchainTexture() to render to the window. + * + * Rendering actually happens in a Render Pass, which is encoded into a + * command buffer. One can encode multiple render passes (or alternate between + * render and compute passes) in a single command buffer, but many apps might + * simply need a single render pass in a single command buffer. Render Passes + * can render to up to four color textures and one depth texture + * simultaneously. If the set of textures being rendered to needs to change, + * the Render Pass must be ended and a new one must be begun. + * + * The app calls SDL_BeginGPURenderPass(). Then it sets states it needs for + * each draw: + * + * - SDL_BindGPUGraphicsPipeline() + * - SDL_SetGPUViewport() + * - SDL_BindGPUVertexBuffers() + * - SDL_BindGPUVertexSamplers() + * - etc + * + * Then, make the actual draw commands with these states: + * + * - SDL_DrawGPUPrimitives() + * - SDL_DrawGPUPrimitivesIndirect() + * - SDL_DrawGPUIndexedPrimitivesIndirect() + * - etc + * + * After all the drawing commands for a pass are complete, the app should call + * SDL_EndGPURenderPass(). Once a render pass ends all render-related state is + * reset. + * + * The app can begin new Render Passes and make new draws in the same command + * buffer until the entire scene is rendered. + * + * Once all of the render commands for the scene are complete, the app calls + * SDL_SubmitGPUCommandBuffer() to send it to the GPU for processing. + * + * If the app needs to read back data from texture or buffers, the API has an + * efficient way of doing this, provided that the app is willing to tolerate + * some latency. When the app uses SDL_DownloadFromGPUTexture() or + * SDL_DownloadFromGPUBuffer(), submitting the command buffer with + * SDL_SubmitGPUCommandBufferAndAcquireFence() will return a fence handle that + * the app can poll or wait on in a thread. Once the fence indicates that the + * command buffer is done processing, it is safe to read the downloaded data. + * Make sure to call SDL_ReleaseGPUFence() when done with the fence. + * + * The API also has "compute" support. The app calls SDL_BeginGPUComputePass() + * with compute-writeable textures and/or buffers, which can be written to in + * a compute shader. Then it sets states it needs for the compute dispatches: + * + * - SDL_BindGPUComputePipeline() + * - SDL_BindGPUComputeStorageBuffers() + * - SDL_BindGPUComputeStorageTextures() + * + * Then, dispatch compute work: + * + * - SDL_DispatchGPUCompute() + * + * For advanced users, this opens up powerful GPU-driven workflows. + * + * Graphics and compute pipelines require the use of shaders, which as + * mentioned above are small programs executed on the GPU. Each backend + * (Vulkan, Metal, D3D12) requires a different shader format. When the app + * creates the GPU device, the app lets the device know which shader formats + * the app can provide. It will then select the appropriate backend depending + * on the available shader formats and the backends available on the platform. + * When creating shaders, the app must provide the correct shader format for + * the selected backend. If you would like to learn more about why the API + * works this way, there is a detailed + * [blog post](https://moonside.games/posts/layers-all-the-way-down/) + * explaining this situation. + * + * It is optimal for apps to pre-compile the shader formats they might use, + * but for ease of use SDL provides a separate project, + * [SDL_shadercross](https://github.com/libsdl-org/SDL_shadercross) + * , for performing runtime shader cross-compilation. It also has a CLI + * interface for offline precompilation as well. + * + * This is an extremely quick overview that leaves out several important + * details. Already, though, one can see that GPU programming can be quite + * complex! If you just need simple 2D graphics, the + * [Render API](https://wiki.libsdl.org/SDL3/CategoryRender) + * is much easier to use but still hardware-accelerated. That said, even for + * 2D applications the performance benefits and expressiveness of the GPU API + * are significant. + * + * The GPU API targets a feature set with a wide range of hardware support and + * ease of portability. It is designed so that the app won't have to branch + * itself by querying feature support. If you need cutting-edge features with + * limited hardware support, this API is probably not for you. + * + * Examples demonstrating proper usage of this API can be found + * [here](https://github.com/TheSpydog/SDL_gpu_examples) + * . + * + * ## Performance considerations + * + * Here are some basic tips for maximizing your rendering performance. + * + * - Beginning a new render pass is relatively expensive. Use as few render + * passes as you can. + * - Minimize the amount of state changes. For example, binding a pipeline is + * relatively cheap, but doing it hundreds of times when you don't need to + * will slow the performance significantly. + * - Perform your data uploads as early as possible in the frame. + * - Don't churn resources. Creating and releasing resources is expensive. + * It's better to create what you need up front and cache it. + * - Don't use uniform buffers for large amounts of data (more than a matrix + * or so). Use a storage buffer instead. + * - Use cycling correctly. There is a detailed explanation of cycling further + * below. + * - Use culling techniques to minimize pixel writes. The less writing the GPU + * has to do the better. Culling can be a very advanced topic but even + * simple culling techniques can boost performance significantly. + * + * In general try to remember the golden rule of performance: doing things is + * more expensive than not doing things. Don't Touch The Driver! + * + * ## FAQ + * + * **Question: When are you adding more advanced features, like ray tracing or + * mesh shaders?** + * + * Answer: We don't have immediate plans to add more bleeding-edge features, + * but we certainly might in the future, when these features prove worthwhile, + * and reasonable to implement across several platforms and underlying APIs. + * So while these things are not in the "never" category, they are definitely + * not "near future" items either. + * + * **Question: Why is my shader not working?** + * + * Answer: A common oversight when using shaders is not properly laying out + * the shader resources/registers correctly. The GPU API is very strict with + * how it wants resources to be laid out and it's difficult for the API to + * automatically validate shaders to see if they have a compatible layout. See + * the documentation for SDL_CreateGPUShader() and + * SDL_CreateGPUComputePipeline() for information on the expected layout. + * + * Another common issue is not setting the correct number of samplers, + * textures, and buffers in SDL_GPUShaderCreateInfo. If possible use shader + * reflection to extract the required information from the shader + * automatically instead of manually filling in the struct's values. + * + * **Question: My application isn't performing very well. Is this the GPU + * API's fault?** + * + * Answer: No. Long answer: The GPU API is a relatively thin layer over the + * underlying graphics API. While it's possible that we have done something + * inefficiently, it's very unlikely especially if you are relatively + * inexperienced with GPU rendering. Please see the performance tips above and + * make sure you are following them. Additionally, tools like RenderDoc can be + * very helpful for diagnosing incorrect behavior and performance issues. + * + * ## System Requirements + * + * **Vulkan:** Supported on Windows, Linux, Nintendo Switch, and certain + * Android devices. Requires Vulkan 1.0 with the following extensions and + * device features: + * + * - `VK_KHR_swapchain` + * - `VK_KHR_maintenance1` + * - `independentBlend` + * - `imageCubeArray` + * - `depthClamp` + * - `shaderClipDistance` + * - `drawIndirectFirstInstance` + * + * **D3D12:** Supported on Windows 10 or newer, Xbox One (GDK), and Xbox + * Series X|S (GDK). Requires a GPU that supports DirectX 12 Feature Level + * 11_1. + * + * **Metal:** Supported on macOS 10.14+ and iOS/tvOS 13.0+. Hardware + * requirements vary by operating system: + * + * - macOS requires an Apple Silicon or + * [Intel Mac2 family](https://developer.apple.com/documentation/metal/mtlfeatureset/mtlfeatureset_macos_gpufamily2_v1?language=objc) + * GPU + * - iOS/tvOS requires an A9 GPU or newer + * - iOS Simulator and tvOS Simulator are unsupported + * + * ## Uniform Data + * + * Uniforms are for passing data to shaders. The uniform data will be constant + * across all executions of the shader. + * + * There are 4 available uniform slots per shader stage (where the stages are + * vertex, fragment, and compute). Uniform data pushed to a slot on a stage + * keeps its value throughout the command buffer until you call the relevant + * Push function on that slot again. + * + * For example, you could write your vertex shaders to read a camera matrix + * from uniform binding slot 0, push the camera matrix at the start of the + * command buffer, and that data will be used for every subsequent draw call. + * + * It is valid to push uniform data during a render or compute pass. + * + * Uniforms are best for pushing small amounts of data. If you are pushing + * more than a matrix or two per call you should consider using a storage + * buffer instead. + * + * ## A Note On Cycling + * + * When using a command buffer, operations do not occur immediately - they + * occur some time after the command buffer is submitted. + * + * When a resource is used in a pending or active command buffer, it is + * considered to be "bound". When a resource is no longer used in any pending + * or active command buffers, it is considered to be "unbound". + * + * If data resources are bound, it is unspecified when that data will be + * unbound unless you acquire a fence when submitting the command buffer and + * wait on it. However, this doesn't mean you need to track resource usage + * manually. + * + * All of the functions and structs that involve writing to a resource have a + * "cycle" bool. SDL_GPUTransferBuffer, SDL_GPUBuffer, and SDL_GPUTexture all + * effectively function as ring buffers on internal resources. When cycle is + * true, if the resource is bound, the cycle rotates to the next unbound + * internal resource, or if none are available, a new one is created. This + * means you don't have to worry about complex state tracking and + * synchronization as long as cycling is correctly employed. + * + * For example: you can call SDL_MapGPUTransferBuffer(), write texture data, + * SDL_UnmapGPUTransferBuffer(), and then SDL_UploadToGPUTexture(). The next + * time you write texture data to the transfer buffer, if you set the cycle + * param to true, you don't have to worry about overwriting any data that is + * not yet uploaded. + * + * Another example: If you are using a texture in a render pass every frame, + * this can cause a data dependency between frames. If you set cycle to true + * in the SDL_GPUColorTargetInfo struct, you can prevent this data dependency. + * + * Cycling will never undefine already bound data. When cycling, all data in + * the resource is considered to be undefined for subsequent commands until + * that data is written again. You must take care not to read undefined data. + * + * Note that when cycling a texture, the entire texture will be cycled, even + * if only part of the texture is used in the call, so you must consider the + * entire texture to contain undefined data after cycling. + * + * You must also take care not to overwrite a section of data that has been + * referenced in a command without cycling first. It is OK to overwrite + * unreferenced data in a bound resource without cycling, but overwriting a + * section of data that has already been referenced will produce unexpected + * results. + */ + +#ifndef SDL_gpu_h_ +#define SDL_gpu_h_ + +#include +#include +#include +#include +#include +#include + +#include +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/* Type Declarations */ + +/** + * An opaque handle representing the SDL_GPU context. + * + * \since This struct is available since SDL 3.2.0. + */ +typedef struct SDL_GPUDevice SDL_GPUDevice; + +/** + * An opaque handle representing a buffer. + * + * Used for vertices, indices, indirect draw commands, and general compute + * data. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUBuffer + * \sa SDL_UploadToGPUBuffer + * \sa SDL_DownloadFromGPUBuffer + * \sa SDL_CopyGPUBufferToBuffer + * \sa SDL_BindGPUVertexBuffers + * \sa SDL_BindGPUIndexBuffer + * \sa SDL_BindGPUVertexStorageBuffers + * \sa SDL_BindGPUFragmentStorageBuffers + * \sa SDL_DrawGPUPrimitivesIndirect + * \sa SDL_DrawGPUIndexedPrimitivesIndirect + * \sa SDL_BindGPUComputeStorageBuffers + * \sa SDL_DispatchGPUComputeIndirect + * \sa SDL_ReleaseGPUBuffer + */ +typedef struct SDL_GPUBuffer SDL_GPUBuffer; + +/** + * An opaque handle representing a transfer buffer. + * + * Used for transferring data to and from the device. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTransferBuffer + * \sa SDL_MapGPUTransferBuffer + * \sa SDL_UnmapGPUTransferBuffer + * \sa SDL_UploadToGPUBuffer + * \sa SDL_UploadToGPUTexture + * \sa SDL_DownloadFromGPUBuffer + * \sa SDL_DownloadFromGPUTexture + * \sa SDL_ReleaseGPUTransferBuffer + */ +typedef struct SDL_GPUTransferBuffer SDL_GPUTransferBuffer; + +/** + * An opaque handle representing a texture. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTexture + * \sa SDL_UploadToGPUTexture + * \sa SDL_DownloadFromGPUTexture + * \sa SDL_CopyGPUTextureToTexture + * \sa SDL_BindGPUVertexSamplers + * \sa SDL_BindGPUVertexStorageTextures + * \sa SDL_BindGPUFragmentSamplers + * \sa SDL_BindGPUFragmentStorageTextures + * \sa SDL_BindGPUComputeStorageTextures + * \sa SDL_GenerateMipmapsForGPUTexture + * \sa SDL_BlitGPUTexture + * \sa SDL_ReleaseGPUTexture + */ +typedef struct SDL_GPUTexture SDL_GPUTexture; + +/** + * An opaque handle representing a sampler. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUSampler + * \sa SDL_BindGPUVertexSamplers + * \sa SDL_BindGPUFragmentSamplers + * \sa SDL_ReleaseGPUSampler + */ +typedef struct SDL_GPUSampler SDL_GPUSampler; + +/** + * An opaque handle representing a compiled shader object. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + * \sa SDL_CreateGPUGraphicsPipeline + * \sa SDL_ReleaseGPUShader + */ +typedef struct SDL_GPUShader SDL_GPUShader; + +/** + * An opaque handle representing a compute pipeline. + * + * Used during compute passes. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUComputePipeline + * \sa SDL_BindGPUComputePipeline + * \sa SDL_ReleaseGPUComputePipeline + */ +typedef struct SDL_GPUComputePipeline SDL_GPUComputePipeline; + +/** + * An opaque handle representing a graphics pipeline. + * + * Used during render passes. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + * \sa SDL_BindGPUGraphicsPipeline + * \sa SDL_ReleaseGPUGraphicsPipeline + */ +typedef struct SDL_GPUGraphicsPipeline SDL_GPUGraphicsPipeline; + +/** + * An opaque handle representing a command buffer. + * + * Most state is managed via command buffers. When setting state using a + * command buffer, that state is local to the command buffer. + * + * Commands only begin execution on the GPU once SDL_SubmitGPUCommandBuffer is + * called. Once the command buffer is submitted, it is no longer valid to use + * it. + * + * Command buffers are executed in submission order. If you submit command + * buffer A and then command buffer B all commands in A will begin executing + * before any command in B begins executing. + * + * In multi-threading scenarios, you should only access a command buffer on + * the thread you acquired it from. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_AcquireGPUCommandBuffer + * \sa SDL_SubmitGPUCommandBuffer + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + */ +typedef struct SDL_GPUCommandBuffer SDL_GPUCommandBuffer; + +/** + * An opaque handle representing a render pass. + * + * This handle is transient and should not be held or referenced after + * SDL_EndGPURenderPass is called. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BeginGPURenderPass + * \sa SDL_EndGPURenderPass + */ +typedef struct SDL_GPURenderPass SDL_GPURenderPass; + +/** + * An opaque handle representing a compute pass. + * + * This handle is transient and should not be held or referenced after + * SDL_EndGPUComputePass is called. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BeginGPUComputePass + * \sa SDL_EndGPUComputePass + */ +typedef struct SDL_GPUComputePass SDL_GPUComputePass; + +/** + * An opaque handle representing a copy pass. + * + * This handle is transient and should not be held or referenced after + * SDL_EndGPUCopyPass is called. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BeginGPUCopyPass + * \sa SDL_EndGPUCopyPass + */ +typedef struct SDL_GPUCopyPass SDL_GPUCopyPass; + +/** + * An opaque handle representing a fence. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + * \sa SDL_QueryGPUFence + * \sa SDL_WaitForGPUFences + * \sa SDL_ReleaseGPUFence + */ +typedef struct SDL_GPUFence SDL_GPUFence; + +/** + * Specifies the primitive topology of a graphics pipeline. + * + * If you are using POINTLIST you must include a point size output in the + * vertex shader. + * + * - For HLSL compiling to SPIRV you must decorate a float output with + * [[vk::builtin("PointSize")]]. + * - For GLSL you must set the gl_PointSize builtin. + * - For MSL you must include a float output with the [[point_size]] + * decorator. + * + * Note that sized point topology is totally unsupported on D3D12. Any size + * other than 1 will be ignored. In general, you should avoid using point + * topology for both compatibility and performance reasons. You WILL regret + * using it. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUPrimitiveType +{ + SDL_GPU_PRIMITIVETYPE_TRIANGLELIST, /**< A series of separate triangles. */ + SDL_GPU_PRIMITIVETYPE_TRIANGLESTRIP, /**< A series of connected triangles. */ + SDL_GPU_PRIMITIVETYPE_LINELIST, /**< A series of separate lines. */ + SDL_GPU_PRIMITIVETYPE_LINESTRIP, /**< A series of connected lines. */ + SDL_GPU_PRIMITIVETYPE_POINTLIST /**< A series of separate points. */ +} SDL_GPUPrimitiveType; + +/** + * Specifies how the contents of a texture attached to a render pass are + * treated at the beginning of the render pass. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_BeginGPURenderPass + */ +typedef enum SDL_GPULoadOp +{ + SDL_GPU_LOADOP_LOAD, /**< The previous contents of the texture will be preserved. */ + SDL_GPU_LOADOP_CLEAR, /**< The contents of the texture will be cleared to a color. */ + SDL_GPU_LOADOP_DONT_CARE /**< The previous contents of the texture need not be preserved. The contents will be undefined. */ +} SDL_GPULoadOp; + +/** + * Specifies how the contents of a texture attached to a render pass are + * treated at the end of the render pass. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_BeginGPURenderPass + */ +typedef enum SDL_GPUStoreOp +{ + SDL_GPU_STOREOP_STORE, /**< The contents generated during the render pass will be written to memory. */ + SDL_GPU_STOREOP_DONT_CARE, /**< The contents generated during the render pass are not needed and may be discarded. The contents will be undefined. */ + SDL_GPU_STOREOP_RESOLVE, /**< The multisample contents generated during the render pass will be resolved to a non-multisample texture. The contents in the multisample texture may then be discarded and will be undefined. */ + SDL_GPU_STOREOP_RESOLVE_AND_STORE /**< The multisample contents generated during the render pass will be resolved to a non-multisample texture. The contents in the multisample texture will be written to memory. */ +} SDL_GPUStoreOp; + +/** + * Specifies the size of elements in an index buffer. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUIndexElementSize +{ + SDL_GPU_INDEXELEMENTSIZE_16BIT, /**< The index elements are 16-bit. */ + SDL_GPU_INDEXELEMENTSIZE_32BIT /**< The index elements are 32-bit. */ +} SDL_GPUIndexElementSize; + +/** + * Specifies the pixel format of a texture. + * + * Texture format support varies depending on driver, hardware, and usage + * flags. In general, you should use SDL_GPUTextureSupportsFormat to query if + * a format is supported before using it. However, there are a few guaranteed + * formats. + * + * FIXME: Check universal support for 32-bit component formats FIXME: Check + * universal support for SIMULTANEOUS_READ_WRITE + * + * For SAMPLER usage, the following formats are universally supported: + * + * - R8G8B8A8_UNORM + * - B8G8R8A8_UNORM + * - R8_UNORM + * - R8_SNORM + * - R8G8_UNORM + * - R8G8_SNORM + * - R8G8B8A8_SNORM + * - R16_FLOAT + * - R16G16_FLOAT + * - R16G16B16A16_FLOAT + * - R32_FLOAT + * - R32G32_FLOAT + * - R32G32B32A32_FLOAT + * - R11G11B10_UFLOAT + * - R8G8B8A8_UNORM_SRGB + * - B8G8R8A8_UNORM_SRGB + * - D16_UNORM + * + * For COLOR_TARGET usage, the following formats are universally supported: + * + * - R8G8B8A8_UNORM + * - B8G8R8A8_UNORM + * - R8_UNORM + * - R16_FLOAT + * - R16G16_FLOAT + * - R16G16B16A16_FLOAT + * - R32_FLOAT + * - R32G32_FLOAT + * - R32G32B32A32_FLOAT + * - R8_UINT + * - R8G8_UINT + * - R8G8B8A8_UINT + * - R16_UINT + * - R16G16_UINT + * - R16G16B16A16_UINT + * - R8_INT + * - R8G8_INT + * - R8G8B8A8_INT + * - R16_INT + * - R16G16_INT + * - R16G16B16A16_INT + * - R8G8B8A8_UNORM_SRGB + * - B8G8R8A8_UNORM_SRGB + * + * For STORAGE usages, the following formats are universally supported: + * + * - R8G8B8A8_UNORM + * - R8G8B8A8_SNORM + * - R16G16B16A16_FLOAT + * - R32_FLOAT + * - R32G32_FLOAT + * - R32G32B32A32_FLOAT + * - R8G8B8A8_UINT + * - R16G16B16A16_UINT + * - R8G8B8A8_INT + * - R16G16B16A16_INT + * + * For DEPTH_STENCIL_TARGET usage, the following formats are universally + * supported: + * + * - D16_UNORM + * - Either (but not necessarily both!) D24_UNORM or D32_FLOAT + * - Either (but not necessarily both!) D24_UNORM_S8_UINT or D32_FLOAT_S8_UINT + * + * Unless D16_UNORM is sufficient for your purposes, always check which of + * D24/D32 is supported before creating a depth-stencil texture! + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTexture + * \sa SDL_GPUTextureSupportsFormat + */ +typedef enum SDL_GPUTextureFormat +{ + SDL_GPU_TEXTUREFORMAT_INVALID, + + /* Unsigned Normalized Float Color Formats */ + SDL_GPU_TEXTUREFORMAT_A8_UNORM, + SDL_GPU_TEXTUREFORMAT_R8_UNORM, + SDL_GPU_TEXTUREFORMAT_R8G8_UNORM, + SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UNORM, + SDL_GPU_TEXTUREFORMAT_R16_UNORM, + SDL_GPU_TEXTUREFORMAT_R16G16_UNORM, + SDL_GPU_TEXTUREFORMAT_R16G16B16A16_UNORM, + SDL_GPU_TEXTUREFORMAT_R10G10B10A2_UNORM, + SDL_GPU_TEXTUREFORMAT_B5G6R5_UNORM, + SDL_GPU_TEXTUREFORMAT_B5G5R5A1_UNORM, + SDL_GPU_TEXTUREFORMAT_B4G4R4A4_UNORM, + SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM, + /* Compressed Unsigned Normalized Float Color Formats */ + SDL_GPU_TEXTUREFORMAT_BC1_RGBA_UNORM, + SDL_GPU_TEXTUREFORMAT_BC2_RGBA_UNORM, + SDL_GPU_TEXTUREFORMAT_BC3_RGBA_UNORM, + SDL_GPU_TEXTUREFORMAT_BC4_R_UNORM, + SDL_GPU_TEXTUREFORMAT_BC5_RG_UNORM, + SDL_GPU_TEXTUREFORMAT_BC7_RGBA_UNORM, + /* Compressed Signed Float Color Formats */ + SDL_GPU_TEXTUREFORMAT_BC6H_RGB_FLOAT, + /* Compressed Unsigned Float Color Formats */ + SDL_GPU_TEXTUREFORMAT_BC6H_RGB_UFLOAT, + /* Signed Normalized Float Color Formats */ + SDL_GPU_TEXTUREFORMAT_R8_SNORM, + SDL_GPU_TEXTUREFORMAT_R8G8_SNORM, + SDL_GPU_TEXTUREFORMAT_R8G8B8A8_SNORM, + SDL_GPU_TEXTUREFORMAT_R16_SNORM, + SDL_GPU_TEXTUREFORMAT_R16G16_SNORM, + SDL_GPU_TEXTUREFORMAT_R16G16B16A16_SNORM, + /* Signed Float Color Formats */ + SDL_GPU_TEXTUREFORMAT_R16_FLOAT, + SDL_GPU_TEXTUREFORMAT_R16G16_FLOAT, + SDL_GPU_TEXTUREFORMAT_R16G16B16A16_FLOAT, + SDL_GPU_TEXTUREFORMAT_R32_FLOAT, + SDL_GPU_TEXTUREFORMAT_R32G32_FLOAT, + SDL_GPU_TEXTUREFORMAT_R32G32B32A32_FLOAT, + /* Unsigned Float Color Formats */ + SDL_GPU_TEXTUREFORMAT_R11G11B10_UFLOAT, + /* Unsigned Integer Color Formats */ + SDL_GPU_TEXTUREFORMAT_R8_UINT, + SDL_GPU_TEXTUREFORMAT_R8G8_UINT, + SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UINT, + SDL_GPU_TEXTUREFORMAT_R16_UINT, + SDL_GPU_TEXTUREFORMAT_R16G16_UINT, + SDL_GPU_TEXTUREFORMAT_R16G16B16A16_UINT, + SDL_GPU_TEXTUREFORMAT_R32_UINT, + SDL_GPU_TEXTUREFORMAT_R32G32_UINT, + SDL_GPU_TEXTUREFORMAT_R32G32B32A32_UINT, + /* Signed Integer Color Formats */ + SDL_GPU_TEXTUREFORMAT_R8_INT, + SDL_GPU_TEXTUREFORMAT_R8G8_INT, + SDL_GPU_TEXTUREFORMAT_R8G8B8A8_INT, + SDL_GPU_TEXTUREFORMAT_R16_INT, + SDL_GPU_TEXTUREFORMAT_R16G16_INT, + SDL_GPU_TEXTUREFORMAT_R16G16B16A16_INT, + SDL_GPU_TEXTUREFORMAT_R32_INT, + SDL_GPU_TEXTUREFORMAT_R32G32_INT, + SDL_GPU_TEXTUREFORMAT_R32G32B32A32_INT, + /* SRGB Unsigned Normalized Color Formats */ + SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM_SRGB, + /* Compressed SRGB Unsigned Normalized Color Formats */ + SDL_GPU_TEXTUREFORMAT_BC1_RGBA_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_BC2_RGBA_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_BC3_RGBA_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_BC7_RGBA_UNORM_SRGB, + /* Depth Formats */ + SDL_GPU_TEXTUREFORMAT_D16_UNORM, + SDL_GPU_TEXTUREFORMAT_D24_UNORM, + SDL_GPU_TEXTUREFORMAT_D32_FLOAT, + SDL_GPU_TEXTUREFORMAT_D24_UNORM_S8_UINT, + SDL_GPU_TEXTUREFORMAT_D32_FLOAT_S8_UINT, + /* Compressed ASTC Normalized Float Color Formats*/ + SDL_GPU_TEXTUREFORMAT_ASTC_4x4_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_5x4_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_5x5_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_6x5_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_6x6_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_8x5_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_8x6_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_8x8_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_10x5_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_10x6_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_10x8_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_10x10_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_12x10_UNORM, + SDL_GPU_TEXTUREFORMAT_ASTC_12x12_UNORM, + /* Compressed SRGB ASTC Normalized Float Color Formats*/ + SDL_GPU_TEXTUREFORMAT_ASTC_4x4_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_5x4_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_5x5_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_6x5_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_6x6_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_8x5_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_8x6_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_8x8_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_10x5_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_10x6_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_10x8_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_10x10_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_12x10_UNORM_SRGB, + SDL_GPU_TEXTUREFORMAT_ASTC_12x12_UNORM_SRGB, + /* Compressed ASTC Signed Float Color Formats*/ + SDL_GPU_TEXTUREFORMAT_ASTC_4x4_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_5x4_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_5x5_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_6x5_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_6x6_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_8x5_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_8x6_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_8x8_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_10x5_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_10x6_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_10x8_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_10x10_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_12x10_FLOAT, + SDL_GPU_TEXTUREFORMAT_ASTC_12x12_FLOAT +} SDL_GPUTextureFormat; + +/** + * Specifies how a texture is intended to be used by the client. + * + * A texture must have at least one usage flag. Note that some usage flag + * combinations are invalid. + * + * With regards to compute storage usage, READ | WRITE means that you can have + * shader A that only writes into the texture and shader B that only reads + * from the texture and bind the same texture to either shader respectively. + * SIMULTANEOUS means that you can do reads and writes within the same shader + * or compute pass. It also implies that atomic ops can be used, since those + * are read-modify-write operations. If you use SIMULTANEOUS, you are + * responsible for avoiding data races, as there is no data synchronization + * within a compute pass. Note that SIMULTANEOUS usage is only supported by a + * limited number of texture formats. + * + * \since This datatype is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTexture + */ +typedef Uint32 SDL_GPUTextureUsageFlags; + +#define SDL_GPU_TEXTUREUSAGE_SAMPLER (1u << 0) /**< Texture supports sampling. */ +#define SDL_GPU_TEXTUREUSAGE_COLOR_TARGET (1u << 1) /**< Texture is a color render target. */ +#define SDL_GPU_TEXTUREUSAGE_DEPTH_STENCIL_TARGET (1u << 2) /**< Texture is a depth stencil target. */ +#define SDL_GPU_TEXTUREUSAGE_GRAPHICS_STORAGE_READ (1u << 3) /**< Texture supports storage reads in graphics stages. */ +#define SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_READ (1u << 4) /**< Texture supports storage reads in the compute stage. */ +#define SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_WRITE (1u << 5) /**< Texture supports storage writes in the compute stage. */ +#define SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_SIMULTANEOUS_READ_WRITE (1u << 6) /**< Texture supports reads and writes in the same compute shader. This is NOT equivalent to READ | WRITE. */ + +/** + * Specifies the type of a texture. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTexture + */ +typedef enum SDL_GPUTextureType +{ + SDL_GPU_TEXTURETYPE_2D, /**< The texture is a 2-dimensional image. */ + SDL_GPU_TEXTURETYPE_2D_ARRAY, /**< The texture is a 2-dimensional array image. */ + SDL_GPU_TEXTURETYPE_3D, /**< The texture is a 3-dimensional image. */ + SDL_GPU_TEXTURETYPE_CUBE, /**< The texture is a cube image. */ + SDL_GPU_TEXTURETYPE_CUBE_ARRAY /**< The texture is a cube array image. */ +} SDL_GPUTextureType; + +/** + * Specifies the sample count of a texture. + * + * Used in multisampling. Note that this value only applies when the texture + * is used as a render target. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTexture + * \sa SDL_GPUTextureSupportsSampleCount + */ +typedef enum SDL_GPUSampleCount +{ + SDL_GPU_SAMPLECOUNT_1, /**< No multisampling. */ + SDL_GPU_SAMPLECOUNT_2, /**< MSAA 2x */ + SDL_GPU_SAMPLECOUNT_4, /**< MSAA 4x */ + SDL_GPU_SAMPLECOUNT_8 /**< MSAA 8x */ +} SDL_GPUSampleCount; + + +/** + * Specifies the face of a cube map. + * + * Can be passed in as the layer field in texture-related structs. + * + * \since This enum is available since SDL 3.2.0. + */ +typedef enum SDL_GPUCubeMapFace +{ + SDL_GPU_CUBEMAPFACE_POSITIVEX, + SDL_GPU_CUBEMAPFACE_NEGATIVEX, + SDL_GPU_CUBEMAPFACE_POSITIVEY, + SDL_GPU_CUBEMAPFACE_NEGATIVEY, + SDL_GPU_CUBEMAPFACE_POSITIVEZ, + SDL_GPU_CUBEMAPFACE_NEGATIVEZ +} SDL_GPUCubeMapFace; + +/** + * Specifies how a buffer is intended to be used by the client. + * + * A buffer must have at least one usage flag. Note that some usage flag + * combinations are invalid. + * + * Unlike textures, READ | WRITE can be used for simultaneous read-write + * usage. The same data synchronization concerns as textures apply. + * + * If you use a STORAGE flag, the data in the buffer must respect std140 + * layout conventions. In practical terms this means you must ensure that vec3 + * and vec4 fields are 16-byte aligned. + * + * \since This datatype is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUBuffer + */ +typedef Uint32 SDL_GPUBufferUsageFlags; + +#define SDL_GPU_BUFFERUSAGE_VERTEX (1u << 0) /**< Buffer is a vertex buffer. */ +#define SDL_GPU_BUFFERUSAGE_INDEX (1u << 1) /**< Buffer is an index buffer. */ +#define SDL_GPU_BUFFERUSAGE_INDIRECT (1u << 2) /**< Buffer is an indirect buffer. */ +#define SDL_GPU_BUFFERUSAGE_GRAPHICS_STORAGE_READ (1u << 3) /**< Buffer supports storage reads in graphics stages. */ +#define SDL_GPU_BUFFERUSAGE_COMPUTE_STORAGE_READ (1u << 4) /**< Buffer supports storage reads in the compute stage. */ +#define SDL_GPU_BUFFERUSAGE_COMPUTE_STORAGE_WRITE (1u << 5) /**< Buffer supports storage writes in the compute stage. */ + +/** + * Specifies how a transfer buffer is intended to be used by the client. + * + * Note that mapping and copying FROM an upload transfer buffer or TO a + * download transfer buffer is undefined behavior. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTransferBuffer + */ +typedef enum SDL_GPUTransferBufferUsage +{ + SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD, + SDL_GPU_TRANSFERBUFFERUSAGE_DOWNLOAD +} SDL_GPUTransferBufferUsage; + +/** + * Specifies which stage a shader program corresponds to. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +typedef enum SDL_GPUShaderStage +{ + SDL_GPU_SHADERSTAGE_VERTEX, + SDL_GPU_SHADERSTAGE_FRAGMENT +} SDL_GPUShaderStage; + +/** + * Specifies the format of shader code. + * + * Each format corresponds to a specific backend that accepts it. + * + * \since This datatype is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +typedef Uint32 SDL_GPUShaderFormat; + +#define SDL_GPU_SHADERFORMAT_INVALID 0 +#define SDL_GPU_SHADERFORMAT_PRIVATE (1u << 0) /**< Shaders for NDA'd platforms. */ +#define SDL_GPU_SHADERFORMAT_SPIRV (1u << 1) /**< SPIR-V shaders for Vulkan. */ +#define SDL_GPU_SHADERFORMAT_DXBC (1u << 2) /**< DXBC SM5_1 shaders for D3D12. */ +#define SDL_GPU_SHADERFORMAT_DXIL (1u << 3) /**< DXIL SM6_0 shaders for D3D12. */ +#define SDL_GPU_SHADERFORMAT_MSL (1u << 4) /**< MSL shaders for Metal. */ +#define SDL_GPU_SHADERFORMAT_METALLIB (1u << 5) /**< Precompiled metallib shaders for Metal. */ + +/** + * Specifies the format of a vertex attribute. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUVertexElementFormat +{ + SDL_GPU_VERTEXELEMENTFORMAT_INVALID, + + /* 32-bit Signed Integers */ + SDL_GPU_VERTEXELEMENTFORMAT_INT, + SDL_GPU_VERTEXELEMENTFORMAT_INT2, + SDL_GPU_VERTEXELEMENTFORMAT_INT3, + SDL_GPU_VERTEXELEMENTFORMAT_INT4, + + /* 32-bit Unsigned Integers */ + SDL_GPU_VERTEXELEMENTFORMAT_UINT, + SDL_GPU_VERTEXELEMENTFORMAT_UINT2, + SDL_GPU_VERTEXELEMENTFORMAT_UINT3, + SDL_GPU_VERTEXELEMENTFORMAT_UINT4, + + /* 32-bit Floats */ + SDL_GPU_VERTEXELEMENTFORMAT_FLOAT, + SDL_GPU_VERTEXELEMENTFORMAT_FLOAT2, + SDL_GPU_VERTEXELEMENTFORMAT_FLOAT3, + SDL_GPU_VERTEXELEMENTFORMAT_FLOAT4, + + /* 8-bit Signed Integers */ + SDL_GPU_VERTEXELEMENTFORMAT_BYTE2, + SDL_GPU_VERTEXELEMENTFORMAT_BYTE4, + + /* 8-bit Unsigned Integers */ + SDL_GPU_VERTEXELEMENTFORMAT_UBYTE2, + SDL_GPU_VERTEXELEMENTFORMAT_UBYTE4, + + /* 8-bit Signed Normalized */ + SDL_GPU_VERTEXELEMENTFORMAT_BYTE2_NORM, + SDL_GPU_VERTEXELEMENTFORMAT_BYTE4_NORM, + + /* 8-bit Unsigned Normalized */ + SDL_GPU_VERTEXELEMENTFORMAT_UBYTE2_NORM, + SDL_GPU_VERTEXELEMENTFORMAT_UBYTE4_NORM, + + /* 16-bit Signed Integers */ + SDL_GPU_VERTEXELEMENTFORMAT_SHORT2, + SDL_GPU_VERTEXELEMENTFORMAT_SHORT4, + + /* 16-bit Unsigned Integers */ + SDL_GPU_VERTEXELEMENTFORMAT_USHORT2, + SDL_GPU_VERTEXELEMENTFORMAT_USHORT4, + + /* 16-bit Signed Normalized */ + SDL_GPU_VERTEXELEMENTFORMAT_SHORT2_NORM, + SDL_GPU_VERTEXELEMENTFORMAT_SHORT4_NORM, + + /* 16-bit Unsigned Normalized */ + SDL_GPU_VERTEXELEMENTFORMAT_USHORT2_NORM, + SDL_GPU_VERTEXELEMENTFORMAT_USHORT4_NORM, + + /* 16-bit Floats */ + SDL_GPU_VERTEXELEMENTFORMAT_HALF2, + SDL_GPU_VERTEXELEMENTFORMAT_HALF4 +} SDL_GPUVertexElementFormat; + +/** + * Specifies the rate at which vertex attributes are pulled from buffers. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUVertexInputRate +{ + SDL_GPU_VERTEXINPUTRATE_VERTEX, /**< Attribute addressing is a function of the vertex index. */ + SDL_GPU_VERTEXINPUTRATE_INSTANCE /**< Attribute addressing is a function of the instance index. */ +} SDL_GPUVertexInputRate; + +/** + * Specifies the fill mode of the graphics pipeline. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUFillMode +{ + SDL_GPU_FILLMODE_FILL, /**< Polygons will be rendered via rasterization. */ + SDL_GPU_FILLMODE_LINE /**< Polygon edges will be drawn as line segments. */ +} SDL_GPUFillMode; + +/** + * Specifies the facing direction in which triangle faces will be culled. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUCullMode +{ + SDL_GPU_CULLMODE_NONE, /**< No triangles are culled. */ + SDL_GPU_CULLMODE_FRONT, /**< Front-facing triangles are culled. */ + SDL_GPU_CULLMODE_BACK /**< Back-facing triangles are culled. */ +} SDL_GPUCullMode; + +/** + * Specifies the vertex winding that will cause a triangle to be determined to + * be front-facing. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUFrontFace +{ + SDL_GPU_FRONTFACE_COUNTER_CLOCKWISE, /**< A triangle with counter-clockwise vertex winding will be considered front-facing. */ + SDL_GPU_FRONTFACE_CLOCKWISE /**< A triangle with clockwise vertex winding will be considered front-facing. */ +} SDL_GPUFrontFace; + +/** + * Specifies a comparison operator for depth, stencil and sampler operations. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUCompareOp +{ + SDL_GPU_COMPAREOP_INVALID, + SDL_GPU_COMPAREOP_NEVER, /**< The comparison always evaluates false. */ + SDL_GPU_COMPAREOP_LESS, /**< The comparison evaluates reference < test. */ + SDL_GPU_COMPAREOP_EQUAL, /**< The comparison evaluates reference == test. */ + SDL_GPU_COMPAREOP_LESS_OR_EQUAL, /**< The comparison evaluates reference <= test. */ + SDL_GPU_COMPAREOP_GREATER, /**< The comparison evaluates reference > test. */ + SDL_GPU_COMPAREOP_NOT_EQUAL, /**< The comparison evaluates reference != test. */ + SDL_GPU_COMPAREOP_GREATER_OR_EQUAL, /**< The comparison evalutes reference >= test. */ + SDL_GPU_COMPAREOP_ALWAYS /**< The comparison always evaluates true. */ +} SDL_GPUCompareOp; + +/** + * Specifies what happens to a stored stencil value if stencil tests fail or + * pass. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUStencilOp +{ + SDL_GPU_STENCILOP_INVALID, + SDL_GPU_STENCILOP_KEEP, /**< Keeps the current value. */ + SDL_GPU_STENCILOP_ZERO, /**< Sets the value to 0. */ + SDL_GPU_STENCILOP_REPLACE, /**< Sets the value to reference. */ + SDL_GPU_STENCILOP_INCREMENT_AND_CLAMP, /**< Increments the current value and clamps to the maximum value. */ + SDL_GPU_STENCILOP_DECREMENT_AND_CLAMP, /**< Decrements the current value and clamps to 0. */ + SDL_GPU_STENCILOP_INVERT, /**< Bitwise-inverts the current value. */ + SDL_GPU_STENCILOP_INCREMENT_AND_WRAP, /**< Increments the current value and wraps back to 0. */ + SDL_GPU_STENCILOP_DECREMENT_AND_WRAP /**< Decrements the current value and wraps to the maximum value. */ +} SDL_GPUStencilOp; + +/** + * Specifies the operator to be used when pixels in a render target are + * blended with existing pixels in the texture. + * + * The source color is the value written by the fragment shader. The + * destination color is the value currently existing in the texture. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUBlendOp +{ + SDL_GPU_BLENDOP_INVALID, + SDL_GPU_BLENDOP_ADD, /**< (source * source_factor) + (destination * destination_factor) */ + SDL_GPU_BLENDOP_SUBTRACT, /**< (source * source_factor) - (destination * destination_factor) */ + SDL_GPU_BLENDOP_REVERSE_SUBTRACT, /**< (destination * destination_factor) - (source * source_factor) */ + SDL_GPU_BLENDOP_MIN, /**< min(source, destination) */ + SDL_GPU_BLENDOP_MAX /**< max(source, destination) */ +} SDL_GPUBlendOp; + +/** + * Specifies a blending factor to be used when pixels in a render target are + * blended with existing pixels in the texture. + * + * The source color is the value written by the fragment shader. The + * destination color is the value currently existing in the texture. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef enum SDL_GPUBlendFactor +{ + SDL_GPU_BLENDFACTOR_INVALID, + SDL_GPU_BLENDFACTOR_ZERO, /**< 0 */ + SDL_GPU_BLENDFACTOR_ONE, /**< 1 */ + SDL_GPU_BLENDFACTOR_SRC_COLOR, /**< source color */ + SDL_GPU_BLENDFACTOR_ONE_MINUS_SRC_COLOR, /**< 1 - source color */ + SDL_GPU_BLENDFACTOR_DST_COLOR, /**< destination color */ + SDL_GPU_BLENDFACTOR_ONE_MINUS_DST_COLOR, /**< 1 - destination color */ + SDL_GPU_BLENDFACTOR_SRC_ALPHA, /**< source alpha */ + SDL_GPU_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, /**< 1 - source alpha */ + SDL_GPU_BLENDFACTOR_DST_ALPHA, /**< destination alpha */ + SDL_GPU_BLENDFACTOR_ONE_MINUS_DST_ALPHA, /**< 1 - destination alpha */ + SDL_GPU_BLENDFACTOR_CONSTANT_COLOR, /**< blend constant */ + SDL_GPU_BLENDFACTOR_ONE_MINUS_CONSTANT_COLOR, /**< 1 - blend constant */ + SDL_GPU_BLENDFACTOR_SRC_ALPHA_SATURATE /**< min(source alpha, 1 - destination alpha) */ +} SDL_GPUBlendFactor; + +/** + * Specifies which color components are written in a graphics pipeline. + * + * \since This datatype is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + */ +typedef Uint8 SDL_GPUColorComponentFlags; + +#define SDL_GPU_COLORCOMPONENT_R (1u << 0) /**< the red component */ +#define SDL_GPU_COLORCOMPONENT_G (1u << 1) /**< the green component */ +#define SDL_GPU_COLORCOMPONENT_B (1u << 2) /**< the blue component */ +#define SDL_GPU_COLORCOMPONENT_A (1u << 3) /**< the alpha component */ + +/** + * Specifies a filter operation used by a sampler. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUSampler + */ +typedef enum SDL_GPUFilter +{ + SDL_GPU_FILTER_NEAREST, /**< Point filtering. */ + SDL_GPU_FILTER_LINEAR /**< Linear filtering. */ +} SDL_GPUFilter; + +/** + * Specifies a mipmap mode used by a sampler. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUSampler + */ +typedef enum SDL_GPUSamplerMipmapMode +{ + SDL_GPU_SAMPLERMIPMAPMODE_NEAREST, /**< Point filtering. */ + SDL_GPU_SAMPLERMIPMAPMODE_LINEAR /**< Linear filtering. */ +} SDL_GPUSamplerMipmapMode; + +/** + * Specifies behavior of texture sampling when the coordinates exceed the 0-1 + * range. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUSampler + */ +typedef enum SDL_GPUSamplerAddressMode +{ + SDL_GPU_SAMPLERADDRESSMODE_REPEAT, /**< Specifies that the coordinates will wrap around. */ + SDL_GPU_SAMPLERADDRESSMODE_MIRRORED_REPEAT, /**< Specifies that the coordinates will wrap around mirrored. */ + SDL_GPU_SAMPLERADDRESSMODE_CLAMP_TO_EDGE /**< Specifies that the coordinates will clamp to the 0-1 range. */ +} SDL_GPUSamplerAddressMode; + +/** + * Specifies the timing that will be used to present swapchain textures to the + * OS. + * + * VSYNC mode will always be supported. IMMEDIATE and MAILBOX modes may not be + * supported on certain systems. + * + * It is recommended to query SDL_WindowSupportsGPUPresentMode after claiming + * the window if you wish to change the present mode to IMMEDIATE or MAILBOX. + * + * - VSYNC: Waits for vblank before presenting. No tearing is possible. If + * there is a pending image to present, the new image is enqueued for + * presentation. Disallows tearing at the cost of visual latency. + * - IMMEDIATE: Immediately presents. Lowest latency option, but tearing may + * occur. + * - MAILBOX: Waits for vblank before presenting. No tearing is possible. If + * there is a pending image to present, the pending image is replaced by the + * new image. Similar to VSYNC, but with reduced visual latency. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_SetGPUSwapchainParameters + * \sa SDL_WindowSupportsGPUPresentMode + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + */ +typedef enum SDL_GPUPresentMode +{ + SDL_GPU_PRESENTMODE_VSYNC, + SDL_GPU_PRESENTMODE_IMMEDIATE, + SDL_GPU_PRESENTMODE_MAILBOX +} SDL_GPUPresentMode; + +/** + * Specifies the texture format and colorspace of the swapchain textures. + * + * SDR will always be supported. Other compositions may not be supported on + * certain systems. + * + * It is recommended to query SDL_WindowSupportsGPUSwapchainComposition after + * claiming the window if you wish to change the swapchain composition from + * SDR. + * + * - SDR: B8G8R8A8 or R8G8B8A8 swapchain. Pixel values are in sRGB encoding. + * - SDR_LINEAR: B8G8R8A8_SRGB or R8G8B8A8_SRGB swapchain. Pixel values are + * stored in memory in sRGB encoding but accessed in shaders in "linear + * sRGB" encoding which is sRGB but with a linear transfer function. + * - HDR_EXTENDED_LINEAR: R16G16B16A16_FLOAT swapchain. Pixel values are in + * extended linear sRGB encoding and permits values outside of the [0, 1] + * range. + * - HDR10_ST2084: A2R10G10B10 or A2B10G10R10 swapchain. Pixel values are in + * BT.2020 ST2084 (PQ) encoding. + * + * \since This enum is available since SDL 3.2.0. + * + * \sa SDL_SetGPUSwapchainParameters + * \sa SDL_WindowSupportsGPUSwapchainComposition + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + */ +typedef enum SDL_GPUSwapchainComposition +{ + SDL_GPU_SWAPCHAINCOMPOSITION_SDR, + SDL_GPU_SWAPCHAINCOMPOSITION_SDR_LINEAR, + SDL_GPU_SWAPCHAINCOMPOSITION_HDR_EXTENDED_LINEAR, + SDL_GPU_SWAPCHAINCOMPOSITION_HDR10_ST2084 +} SDL_GPUSwapchainComposition; + +/* Structures */ + +/** + * A structure specifying a viewport. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_SetGPUViewport + */ +typedef struct SDL_GPUViewport +{ + float x; /**< The left offset of the viewport. */ + float y; /**< The top offset of the viewport. */ + float w; /**< The width of the viewport. */ + float h; /**< The height of the viewport. */ + float min_depth; /**< The minimum depth of the viewport. */ + float max_depth; /**< The maximum depth of the viewport. */ +} SDL_GPUViewport; + +/** + * A structure specifying parameters related to transferring data to or from a + * texture. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUTexture + * \sa SDL_DownloadFromGPUTexture + */ +typedef struct SDL_GPUTextureTransferInfo +{ + SDL_GPUTransferBuffer *transfer_buffer; /**< The transfer buffer used in the transfer operation. */ + Uint32 offset; /**< The starting byte of the image data in the transfer buffer. */ + Uint32 pixels_per_row; /**< The number of pixels from one row to the next. */ + Uint32 rows_per_layer; /**< The number of rows from one layer/depth-slice to the next. */ +} SDL_GPUTextureTransferInfo; + +/** + * A structure specifying a location in a transfer buffer. + * + * Used when transferring buffer data to or from a transfer buffer. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUBuffer + * \sa SDL_DownloadFromGPUBuffer + */ +typedef struct SDL_GPUTransferBufferLocation +{ + SDL_GPUTransferBuffer *transfer_buffer; /**< The transfer buffer used in the transfer operation. */ + Uint32 offset; /**< The starting byte of the buffer data in the transfer buffer. */ +} SDL_GPUTransferBufferLocation; + +/** + * A structure specifying a location in a texture. + * + * Used when copying data from one texture to another. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CopyGPUTextureToTexture + */ +typedef struct SDL_GPUTextureLocation +{ + SDL_GPUTexture *texture; /**< The texture used in the copy operation. */ + Uint32 mip_level; /**< The mip level index of the location. */ + Uint32 layer; /**< The layer index of the location. */ + Uint32 x; /**< The left offset of the location. */ + Uint32 y; /**< The top offset of the location. */ + Uint32 z; /**< The front offset of the location. */ +} SDL_GPUTextureLocation; + +/** + * A structure specifying a region of a texture. + * + * Used when transferring data to or from a texture. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUTexture + * \sa SDL_DownloadFromGPUTexture + * \sa SDL_CreateGPUTexture + */ +typedef struct SDL_GPUTextureRegion +{ + SDL_GPUTexture *texture; /**< The texture used in the copy operation. */ + Uint32 mip_level; /**< The mip level index to transfer. */ + Uint32 layer; /**< The layer index to transfer. */ + Uint32 x; /**< The left offset of the region. */ + Uint32 y; /**< The top offset of the region. */ + Uint32 z; /**< The front offset of the region. */ + Uint32 w; /**< The width of the region. */ + Uint32 h; /**< The height of the region. */ + Uint32 d; /**< The depth of the region. */ +} SDL_GPUTextureRegion; + +/** + * A structure specifying a region of a texture used in the blit operation. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BlitGPUTexture + */ +typedef struct SDL_GPUBlitRegion +{ + SDL_GPUTexture *texture; /**< The texture. */ + Uint32 mip_level; /**< The mip level index of the region. */ + Uint32 layer_or_depth_plane; /**< The layer index or depth plane of the region. This value is treated as a layer index on 2D array and cube textures, and as a depth plane on 3D textures. */ + Uint32 x; /**< The left offset of the region. */ + Uint32 y; /**< The top offset of the region. */ + Uint32 w; /**< The width of the region. */ + Uint32 h; /**< The height of the region. */ +} SDL_GPUBlitRegion; + +/** + * A structure specifying a location in a buffer. + * + * Used when copying data between buffers. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CopyGPUBufferToBuffer + */ +typedef struct SDL_GPUBufferLocation +{ + SDL_GPUBuffer *buffer; /**< The buffer. */ + Uint32 offset; /**< The starting byte within the buffer. */ +} SDL_GPUBufferLocation; + +/** + * A structure specifying a region of a buffer. + * + * Used when transferring data to or from buffers. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUBuffer + * \sa SDL_DownloadFromGPUBuffer + */ +typedef struct SDL_GPUBufferRegion +{ + SDL_GPUBuffer *buffer; /**< The buffer. */ + Uint32 offset; /**< The starting byte within the buffer. */ + Uint32 size; /**< The size in bytes of the region. */ +} SDL_GPUBufferRegion; + +/** + * A structure specifying the parameters of an indirect draw command. + * + * Note that the `first_vertex` and `first_instance` parameters are NOT + * compatible with built-in vertex/instance ID variables in shaders (for + * example, SV_VertexID); GPU APIs and shader languages do not define these + * built-in variables consistently, so if your shader depends on them, the + * only way to keep behavior consistent and portable is to always pass 0 for + * the correlating parameter in the draw calls. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_DrawGPUPrimitivesIndirect + */ +typedef struct SDL_GPUIndirectDrawCommand +{ + Uint32 num_vertices; /**< The number of vertices to draw. */ + Uint32 num_instances; /**< The number of instances to draw. */ + Uint32 first_vertex; /**< The index of the first vertex to draw. */ + Uint32 first_instance; /**< The ID of the first instance to draw. */ +} SDL_GPUIndirectDrawCommand; + +/** + * A structure specifying the parameters of an indexed indirect draw command. + * + * Note that the `first_vertex` and `first_instance` parameters are NOT + * compatible with built-in vertex/instance ID variables in shaders (for + * example, SV_VertexID); GPU APIs and shader languages do not define these + * built-in variables consistently, so if your shader depends on them, the + * only way to keep behavior consistent and portable is to always pass 0 for + * the correlating parameter in the draw calls. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_DrawGPUIndexedPrimitivesIndirect + */ +typedef struct SDL_GPUIndexedIndirectDrawCommand +{ + Uint32 num_indices; /**< The number of indices to draw per instance. */ + Uint32 num_instances; /**< The number of instances to draw. */ + Uint32 first_index; /**< The base index within the index buffer. */ + Sint32 vertex_offset; /**< The value added to the vertex index before indexing into the vertex buffer. */ + Uint32 first_instance; /**< The ID of the first instance to draw. */ +} SDL_GPUIndexedIndirectDrawCommand; + +/** + * A structure specifying the parameters of an indexed dispatch command. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_DispatchGPUComputeIndirect + */ +typedef struct SDL_GPUIndirectDispatchCommand +{ + Uint32 groupcount_x; /**< The number of local workgroups to dispatch in the X dimension. */ + Uint32 groupcount_y; /**< The number of local workgroups to dispatch in the Y dimension. */ + Uint32 groupcount_z; /**< The number of local workgroups to dispatch in the Z dimension. */ +} SDL_GPUIndirectDispatchCommand; + +/* State structures */ + +/** + * A structure specifying the parameters of a sampler. + * + * Note that mip_lod_bias is a no-op for the Metal driver. For Metal, LOD bias + * must be applied via shader instead. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUSampler + * \sa SDL_GPUFilter + * \sa SDL_GPUSamplerMipmapMode + * \sa SDL_GPUSamplerAddressMode + * \sa SDL_GPUCompareOp + */ +typedef struct SDL_GPUSamplerCreateInfo +{ + SDL_GPUFilter min_filter; /**< The minification filter to apply to lookups. */ + SDL_GPUFilter mag_filter; /**< The magnification filter to apply to lookups. */ + SDL_GPUSamplerMipmapMode mipmap_mode; /**< The mipmap filter to apply to lookups. */ + SDL_GPUSamplerAddressMode address_mode_u; /**< The addressing mode for U coordinates outside [0, 1). */ + SDL_GPUSamplerAddressMode address_mode_v; /**< The addressing mode for V coordinates outside [0, 1). */ + SDL_GPUSamplerAddressMode address_mode_w; /**< The addressing mode for W coordinates outside [0, 1). */ + float mip_lod_bias; /**< The bias to be added to mipmap LOD calculation. */ + float max_anisotropy; /**< The anisotropy value clamp used by the sampler. If enable_anisotropy is false, this is ignored. */ + SDL_GPUCompareOp compare_op; /**< The comparison operator to apply to fetched data before filtering. */ + float min_lod; /**< Clamps the minimum of the computed LOD value. */ + float max_lod; /**< Clamps the maximum of the computed LOD value. */ + bool enable_anisotropy; /**< true to enable anisotropic filtering. */ + bool enable_compare; /**< true to enable comparison against a reference value during lookups. */ + Uint8 padding1; + Uint8 padding2; + + SDL_PropertiesID props; /**< A properties ID for extensions. Should be 0 if no extensions are needed. */ +} SDL_GPUSamplerCreateInfo; + +/** + * A structure specifying the parameters of vertex buffers used in a graphics + * pipeline. + * + * When you call SDL_BindGPUVertexBuffers, you specify the binding slots of + * the vertex buffers. For example if you called SDL_BindGPUVertexBuffers with + * a first_slot of 2 and num_bindings of 3, the binding slots 2, 3, 4 would be + * used by the vertex buffers you pass in. + * + * Vertex attributes are linked to buffers via the buffer_slot field of + * SDL_GPUVertexAttribute. For example, if an attribute has a buffer_slot of + * 0, then that attribute belongs to the vertex buffer bound at slot 0. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUVertexAttribute + * \sa SDL_GPUVertexInputRate + */ +typedef struct SDL_GPUVertexBufferDescription +{ + Uint32 slot; /**< The binding slot of the vertex buffer. */ + Uint32 pitch; /**< The size of a single element + the offset between elements. */ + SDL_GPUVertexInputRate input_rate; /**< Whether attribute addressing is a function of the vertex index or instance index. */ + Uint32 instance_step_rate; /**< Reserved for future use. Must be set to 0. */ +} SDL_GPUVertexBufferDescription; + +/** + * A structure specifying a vertex attribute. + * + * All vertex attribute locations provided to an SDL_GPUVertexInputState must + * be unique. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUVertexBufferDescription + * \sa SDL_GPUVertexInputState + * \sa SDL_GPUVertexElementFormat + */ +typedef struct SDL_GPUVertexAttribute +{ + Uint32 location; /**< The shader input location index. */ + Uint32 buffer_slot; /**< The binding slot of the associated vertex buffer. */ + SDL_GPUVertexElementFormat format; /**< The size and type of the attribute data. */ + Uint32 offset; /**< The byte offset of this attribute relative to the start of the vertex element. */ +} SDL_GPUVertexAttribute; + +/** + * A structure specifying the parameters of a graphics pipeline vertex input + * state. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUGraphicsPipelineCreateInfo + * \sa SDL_GPUVertexBufferDescription + * \sa SDL_GPUVertexAttribute + */ +typedef struct SDL_GPUVertexInputState +{ + const SDL_GPUVertexBufferDescription *vertex_buffer_descriptions; /**< A pointer to an array of vertex buffer descriptions. */ + Uint32 num_vertex_buffers; /**< The number of vertex buffer descriptions in the above array. */ + const SDL_GPUVertexAttribute *vertex_attributes; /**< A pointer to an array of vertex attribute descriptions. */ + Uint32 num_vertex_attributes; /**< The number of vertex attribute descriptions in the above array. */ +} SDL_GPUVertexInputState; + +/** + * A structure specifying the stencil operation state of a graphics pipeline. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUDepthStencilState + */ +typedef struct SDL_GPUStencilOpState +{ + SDL_GPUStencilOp fail_op; /**< The action performed on samples that fail the stencil test. */ + SDL_GPUStencilOp pass_op; /**< The action performed on samples that pass the depth and stencil tests. */ + SDL_GPUStencilOp depth_fail_op; /**< The action performed on samples that pass the stencil test and fail the depth test. */ + SDL_GPUCompareOp compare_op; /**< The comparison operator used in the stencil test. */ +} SDL_GPUStencilOpState; + +/** + * A structure specifying the blend state of a color target. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUColorTargetDescription + */ +typedef struct SDL_GPUColorTargetBlendState +{ + SDL_GPUBlendFactor src_color_blendfactor; /**< The value to be multiplied by the source RGB value. */ + SDL_GPUBlendFactor dst_color_blendfactor; /**< The value to be multiplied by the destination RGB value. */ + SDL_GPUBlendOp color_blend_op; /**< The blend operation for the RGB components. */ + SDL_GPUBlendFactor src_alpha_blendfactor; /**< The value to be multiplied by the source alpha. */ + SDL_GPUBlendFactor dst_alpha_blendfactor; /**< The value to be multiplied by the destination alpha. */ + SDL_GPUBlendOp alpha_blend_op; /**< The blend operation for the alpha component. */ + SDL_GPUColorComponentFlags color_write_mask; /**< A bitmask specifying which of the RGBA components are enabled for writing. Writes to all channels if enable_color_write_mask is false. */ + bool enable_blend; /**< Whether blending is enabled for the color target. */ + bool enable_color_write_mask; /**< Whether the color write mask is enabled. */ + Uint8 padding1; + Uint8 padding2; +} SDL_GPUColorTargetBlendState; + + +/** + * A structure specifying code and metadata for creating a shader object. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +typedef struct SDL_GPUShaderCreateInfo +{ + size_t code_size; /**< The size in bytes of the code pointed to. */ + const Uint8 *code; /**< A pointer to shader code. */ + const char *entrypoint; /**< A pointer to a null-terminated UTF-8 string specifying the entry point function name for the shader. */ + SDL_GPUShaderFormat format; /**< The format of the shader code. */ + SDL_GPUShaderStage stage; /**< The stage the shader program corresponds to. */ + Uint32 num_samplers; /**< The number of samplers defined in the shader. */ + Uint32 num_storage_textures; /**< The number of storage textures defined in the shader. */ + Uint32 num_storage_buffers; /**< The number of storage buffers defined in the shader. */ + Uint32 num_uniform_buffers; /**< The number of uniform buffers defined in the shader. */ + + SDL_PropertiesID props; /**< A properties ID for extensions. Should be 0 if no extensions are needed. */ +} SDL_GPUShaderCreateInfo; + +/** + * A structure specifying the parameters of a texture. + * + * Usage flags can be bitwise OR'd together for combinations of usages. Note + * that certain usage combinations are invalid, for example SAMPLER and + * GRAPHICS_STORAGE. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTexture + * \sa SDL_GPUTextureType + * \sa SDL_GPUTextureFormat + * \sa SDL_GPUTextureUsageFlags + * \sa SDL_GPUSampleCount + */ +typedef struct SDL_GPUTextureCreateInfo +{ + SDL_GPUTextureType type; /**< The base dimensionality of the texture. */ + SDL_GPUTextureFormat format; /**< The pixel format of the texture. */ + SDL_GPUTextureUsageFlags usage; /**< How the texture is intended to be used by the client. */ + Uint32 width; /**< The width of the texture. */ + Uint32 height; /**< The height of the texture. */ + Uint32 layer_count_or_depth; /**< The layer count or depth of the texture. This value is treated as a layer count on 2D array textures, and as a depth value on 3D textures. */ + Uint32 num_levels; /**< The number of mip levels in the texture. */ + SDL_GPUSampleCount sample_count; /**< The number of samples per texel. Only applies if the texture is used as a render target. */ + + SDL_PropertiesID props; /**< A properties ID for extensions. Should be 0 if no extensions are needed. */ +} SDL_GPUTextureCreateInfo; + +/** + * A structure specifying the parameters of a buffer. + * + * Usage flags can be bitwise OR'd together for combinations of usages. Note + * that certain combinations are invalid, for example VERTEX and INDEX. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUBuffer + * \sa SDL_GPUBufferUsageFlags + */ +typedef struct SDL_GPUBufferCreateInfo +{ + SDL_GPUBufferUsageFlags usage; /**< How the buffer is intended to be used by the client. */ + Uint32 size; /**< The size in bytes of the buffer. */ + + SDL_PropertiesID props; /**< A properties ID for extensions. Should be 0 if no extensions are needed. */ +} SDL_GPUBufferCreateInfo; + +/** + * A structure specifying the parameters of a transfer buffer. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTransferBuffer + */ +typedef struct SDL_GPUTransferBufferCreateInfo +{ + SDL_GPUTransferBufferUsage usage; /**< How the transfer buffer is intended to be used by the client. */ + Uint32 size; /**< The size in bytes of the transfer buffer. */ + + SDL_PropertiesID props; /**< A properties ID for extensions. Should be 0 if no extensions are needed. */ +} SDL_GPUTransferBufferCreateInfo; + +/* Pipeline state structures */ + +/** + * A structure specifying the parameters of the graphics pipeline rasterizer + * state. + * + * Note that SDL_GPU_FILLMODE_LINE is not supported on many Android devices. + * For those devices, the fill mode will automatically fall back to FILL. + * + * Also note that the D3D12 driver will enable depth clamping even if + * enable_depth_clip is true. If you need this clamp+clip behavior, consider + * enabling depth clip and then manually clamping depth in your fragment + * shaders on Metal and Vulkan. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUGraphicsPipelineCreateInfo + */ +typedef struct SDL_GPURasterizerState +{ + SDL_GPUFillMode fill_mode; /**< Whether polygons will be filled in or drawn as lines. */ + SDL_GPUCullMode cull_mode; /**< The facing direction in which triangles will be culled. */ + SDL_GPUFrontFace front_face; /**< The vertex winding that will cause a triangle to be determined as front-facing. */ + float depth_bias_constant_factor; /**< A scalar factor controlling the depth value added to each fragment. */ + float depth_bias_clamp; /**< The maximum depth bias of a fragment. */ + float depth_bias_slope_factor; /**< A scalar factor applied to a fragment's slope in depth calculations. */ + bool enable_depth_bias; /**< true to bias fragment depth values. */ + bool enable_depth_clip; /**< true to enable depth clip, false to enable depth clamp. */ + Uint8 padding1; + Uint8 padding2; +} SDL_GPURasterizerState; + +/** + * A structure specifying the parameters of the graphics pipeline multisample + * state. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUGraphicsPipelineCreateInfo + */ +typedef struct SDL_GPUMultisampleState +{ + SDL_GPUSampleCount sample_count; /**< The number of samples to be used in rasterization. */ + Uint32 sample_mask; /**< Reserved for future use. Must be set to 0. */ + bool enable_mask; /**< Reserved for future use. Must be set to false. */ + Uint8 padding1; + Uint8 padding2; + Uint8 padding3; +} SDL_GPUMultisampleState; + +/** + * A structure specifying the parameters of the graphics pipeline depth + * stencil state. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUGraphicsPipelineCreateInfo + */ +typedef struct SDL_GPUDepthStencilState +{ + SDL_GPUCompareOp compare_op; /**< The comparison operator used for depth testing. */ + SDL_GPUStencilOpState back_stencil_state; /**< The stencil op state for back-facing triangles. */ + SDL_GPUStencilOpState front_stencil_state; /**< The stencil op state for front-facing triangles. */ + Uint8 compare_mask; /**< Selects the bits of the stencil values participating in the stencil test. */ + Uint8 write_mask; /**< Selects the bits of the stencil values updated by the stencil test. */ + bool enable_depth_test; /**< true enables the depth test. */ + bool enable_depth_write; /**< true enables depth writes. Depth writes are always disabled when enable_depth_test is false. */ + bool enable_stencil_test; /**< true enables the stencil test. */ + Uint8 padding1; + Uint8 padding2; + Uint8 padding3; +} SDL_GPUDepthStencilState; + +/** + * A structure specifying the parameters of color targets used in a graphics + * pipeline. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUGraphicsPipelineTargetInfo + */ +typedef struct SDL_GPUColorTargetDescription +{ + SDL_GPUTextureFormat format; /**< The pixel format of the texture to be used as a color target. */ + SDL_GPUColorTargetBlendState blend_state; /**< The blend state to be used for the color target. */ +} SDL_GPUColorTargetDescription; + +/** + * A structure specifying the descriptions of render targets used in a + * graphics pipeline. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_GPUGraphicsPipelineCreateInfo + * \sa SDL_GPUColorTargetDescription + * \sa SDL_GPUTextureFormat + */ +typedef struct SDL_GPUGraphicsPipelineTargetInfo +{ + const SDL_GPUColorTargetDescription *color_target_descriptions; /**< A pointer to an array of color target descriptions. */ + Uint32 num_color_targets; /**< The number of color target descriptions in the above array. */ + SDL_GPUTextureFormat depth_stencil_format; /**< The pixel format of the depth-stencil target. Ignored if has_depth_stencil_target is false. */ + bool has_depth_stencil_target; /**< true specifies that the pipeline uses a depth-stencil target. */ + Uint8 padding1; + Uint8 padding2; + Uint8 padding3; +} SDL_GPUGraphicsPipelineTargetInfo; + +/** + * A structure specifying the parameters of a graphics pipeline state. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + * \sa SDL_GPUShader + * \sa SDL_GPUVertexInputState + * \sa SDL_GPUPrimitiveType + * \sa SDL_GPURasterizerState + * \sa SDL_GPUMultisampleState + * \sa SDL_GPUDepthStencilState + * \sa SDL_GPUGraphicsPipelineTargetInfo + */ +typedef struct SDL_GPUGraphicsPipelineCreateInfo +{ + SDL_GPUShader *vertex_shader; /**< The vertex shader used by the graphics pipeline. */ + SDL_GPUShader *fragment_shader; /**< The fragment shader used by the graphics pipeline. */ + SDL_GPUVertexInputState vertex_input_state; /**< The vertex layout of the graphics pipeline. */ + SDL_GPUPrimitiveType primitive_type; /**< The primitive topology of the graphics pipeline. */ + SDL_GPURasterizerState rasterizer_state; /**< The rasterizer state of the graphics pipeline. */ + SDL_GPUMultisampleState multisample_state; /**< The multisample state of the graphics pipeline. */ + SDL_GPUDepthStencilState depth_stencil_state; /**< The depth-stencil state of the graphics pipeline. */ + SDL_GPUGraphicsPipelineTargetInfo target_info; /**< Formats and blend modes for the render targets of the graphics pipeline. */ + + SDL_PropertiesID props; /**< A properties ID for extensions. Should be 0 if no extensions are needed. */ +} SDL_GPUGraphicsPipelineCreateInfo; + +/** + * A structure specifying the parameters of a compute pipeline state. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUComputePipeline + * \sa SDL_GPUShaderFormat + */ +typedef struct SDL_GPUComputePipelineCreateInfo +{ + size_t code_size; /**< The size in bytes of the compute shader code pointed to. */ + const Uint8 *code; /**< A pointer to compute shader code. */ + const char *entrypoint; /**< A pointer to a null-terminated UTF-8 string specifying the entry point function name for the shader. */ + SDL_GPUShaderFormat format; /**< The format of the compute shader code. */ + Uint32 num_samplers; /**< The number of samplers defined in the shader. */ + Uint32 num_readonly_storage_textures; /**< The number of readonly storage textures defined in the shader. */ + Uint32 num_readonly_storage_buffers; /**< The number of readonly storage buffers defined in the shader. */ + Uint32 num_readwrite_storage_textures; /**< The number of read-write storage textures defined in the shader. */ + Uint32 num_readwrite_storage_buffers; /**< The number of read-write storage buffers defined in the shader. */ + Uint32 num_uniform_buffers; /**< The number of uniform buffers defined in the shader. */ + Uint32 threadcount_x; /**< The number of threads in the X dimension. This should match the value in the shader. */ + Uint32 threadcount_y; /**< The number of threads in the Y dimension. This should match the value in the shader. */ + Uint32 threadcount_z; /**< The number of threads in the Z dimension. This should match the value in the shader. */ + + SDL_PropertiesID props; /**< A properties ID for extensions. Should be 0 if no extensions are needed. */ +} SDL_GPUComputePipelineCreateInfo; + +/** + * A structure specifying the parameters of a color target used by a render + * pass. + * + * The load_op field determines what is done with the texture at the beginning + * of the render pass. + * + * - LOAD: Loads the data currently in the texture. Not recommended for + * multisample textures as it requires significant memory bandwidth. + * - CLEAR: Clears the texture to a single color. + * - DONT_CARE: The driver will do whatever it wants with the texture memory. + * This is a good option if you know that every single pixel will be touched + * in the render pass. + * + * The store_op field determines what is done with the color results of the + * render pass. + * + * - STORE: Stores the results of the render pass in the texture. Not + * recommended for multisample textures as it requires significant memory + * bandwidth. + * - DONT_CARE: The driver will do whatever it wants with the texture memory. + * This is often a good option for depth/stencil textures. + * - RESOLVE: Resolves a multisample texture into resolve_texture, which must + * have a sample count of 1. Then the driver may discard the multisample + * texture memory. This is the most performant method of resolving a + * multisample target. + * - RESOLVE_AND_STORE: Resolves a multisample texture into the + * resolve_texture, which must have a sample count of 1. Then the driver + * stores the multisample texture's contents. Not recommended as it requires + * significant memory bandwidth. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BeginGPURenderPass + */ +typedef struct SDL_GPUColorTargetInfo +{ + SDL_GPUTexture *texture; /**< The texture that will be used as a color target by a render pass. */ + Uint32 mip_level; /**< The mip level to use as a color target. */ + Uint32 layer_or_depth_plane; /**< The layer index or depth plane to use as a color target. This value is treated as a layer index on 2D array and cube textures, and as a depth plane on 3D textures. */ + SDL_FColor clear_color; /**< The color to clear the color target to at the start of the render pass. Ignored if SDL_GPU_LOADOP_CLEAR is not used. */ + SDL_GPULoadOp load_op; /**< What is done with the contents of the color target at the beginning of the render pass. */ + SDL_GPUStoreOp store_op; /**< What is done with the results of the render pass. */ + SDL_GPUTexture *resolve_texture; /**< The texture that will receive the results of a multisample resolve operation. Ignored if a RESOLVE* store_op is not used. */ + Uint32 resolve_mip_level; /**< The mip level of the resolve texture to use for the resolve operation. Ignored if a RESOLVE* store_op is not used. */ + Uint32 resolve_layer; /**< The layer index of the resolve texture to use for the resolve operation. Ignored if a RESOLVE* store_op is not used. */ + bool cycle; /**< true cycles the texture if the texture is bound and load_op is not LOAD */ + bool cycle_resolve_texture; /**< true cycles the resolve texture if the resolve texture is bound. Ignored if a RESOLVE* store_op is not used. */ + Uint8 padding1; + Uint8 padding2; +} SDL_GPUColorTargetInfo; + +/** + * A structure specifying the parameters of a depth-stencil target used by a + * render pass. + * + * The load_op field determines what is done with the depth contents of the + * texture at the beginning of the render pass. + * + * - LOAD: Loads the depth values currently in the texture. + * - CLEAR: Clears the texture to a single depth. + * - DONT_CARE: The driver will do whatever it wants with the memory. This is + * a good option if you know that every single pixel will be touched in the + * render pass. + * + * The store_op field determines what is done with the depth results of the + * render pass. + * + * - STORE: Stores the depth results in the texture. + * - DONT_CARE: The driver will do whatever it wants with the depth results. + * This is often a good option for depth/stencil textures that don't need to + * be reused again. + * + * The stencil_load_op field determines what is done with the stencil contents + * of the texture at the beginning of the render pass. + * + * - LOAD: Loads the stencil values currently in the texture. + * - CLEAR: Clears the stencil values to a single value. + * - DONT_CARE: The driver will do whatever it wants with the memory. This is + * a good option if you know that every single pixel will be touched in the + * render pass. + * + * The stencil_store_op field determines what is done with the stencil results + * of the render pass. + * + * - STORE: Stores the stencil results in the texture. + * - DONT_CARE: The driver will do whatever it wants with the stencil results. + * This is often a good option for depth/stencil textures that don't need to + * be reused again. + * + * Note that depth/stencil targets do not support multisample resolves. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BeginGPURenderPass + */ +typedef struct SDL_GPUDepthStencilTargetInfo +{ + SDL_GPUTexture *texture; /**< The texture that will be used as the depth stencil target by the render pass. */ + float clear_depth; /**< The value to clear the depth component to at the beginning of the render pass. Ignored if SDL_GPU_LOADOP_CLEAR is not used. */ + SDL_GPULoadOp load_op; /**< What is done with the depth contents at the beginning of the render pass. */ + SDL_GPUStoreOp store_op; /**< What is done with the depth results of the render pass. */ + SDL_GPULoadOp stencil_load_op; /**< What is done with the stencil contents at the beginning of the render pass. */ + SDL_GPUStoreOp stencil_store_op; /**< What is done with the stencil results of the render pass. */ + bool cycle; /**< true cycles the texture if the texture is bound and any load ops are not LOAD */ + Uint8 clear_stencil; /**< The value to clear the stencil component to at the beginning of the render pass. Ignored if SDL_GPU_LOADOP_CLEAR is not used. */ + Uint8 padding1; + Uint8 padding2; +} SDL_GPUDepthStencilTargetInfo; + +/** + * A structure containing parameters for a blit command. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BlitGPUTexture + */ +typedef struct SDL_GPUBlitInfo { + SDL_GPUBlitRegion source; /**< The source region for the blit. */ + SDL_GPUBlitRegion destination; /**< The destination region for the blit. */ + SDL_GPULoadOp load_op; /**< What is done with the contents of the destination before the blit. */ + SDL_FColor clear_color; /**< The color to clear the destination region to before the blit. Ignored if load_op is not SDL_GPU_LOADOP_CLEAR. */ + SDL_FlipMode flip_mode; /**< The flip mode for the source region. */ + SDL_GPUFilter filter; /**< The filter mode used when blitting. */ + bool cycle; /**< true cycles the destination texture if it is already bound. */ + Uint8 padding1; + Uint8 padding2; + Uint8 padding3; +} SDL_GPUBlitInfo; + +/* Binding structs */ + +/** + * A structure specifying parameters in a buffer binding call. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BindGPUVertexBuffers + * \sa SDL_BindGPUIndexBuffer + */ +typedef struct SDL_GPUBufferBinding +{ + SDL_GPUBuffer *buffer; /**< The buffer to bind. Must have been created with SDL_GPU_BUFFERUSAGE_VERTEX for SDL_BindGPUVertexBuffers, or SDL_GPU_BUFFERUSAGE_INDEX for SDL_BindGPUIndexBuffer. */ + Uint32 offset; /**< The starting byte of the data to bind in the buffer. */ +} SDL_GPUBufferBinding; + +/** + * A structure specifying parameters in a sampler binding call. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BindGPUVertexSamplers + * \sa SDL_BindGPUFragmentSamplers + */ +typedef struct SDL_GPUTextureSamplerBinding +{ + SDL_GPUTexture *texture; /**< The texture to bind. Must have been created with SDL_GPU_TEXTUREUSAGE_SAMPLER. */ + SDL_GPUSampler *sampler; /**< The sampler to bind. */ +} SDL_GPUTextureSamplerBinding; + +/** + * A structure specifying parameters related to binding buffers in a compute + * pass. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BeginGPUComputePass + */ +typedef struct SDL_GPUStorageBufferReadWriteBinding +{ + SDL_GPUBuffer *buffer; /**< The buffer to bind. Must have been created with SDL_GPU_BUFFERUSAGE_COMPUTE_STORAGE_WRITE. */ + bool cycle; /**< true cycles the buffer if it is already bound. */ + Uint8 padding1; + Uint8 padding2; + Uint8 padding3; +} SDL_GPUStorageBufferReadWriteBinding; + +/** + * A structure specifying parameters related to binding textures in a compute + * pass. + * + * \since This struct is available since SDL 3.2.0. + * + * \sa SDL_BeginGPUComputePass + */ +typedef struct SDL_GPUStorageTextureReadWriteBinding +{ + SDL_GPUTexture *texture; /**< The texture to bind. Must have been created with SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_WRITE or SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_SIMULTANEOUS_READ_WRITE. */ + Uint32 mip_level; /**< The mip level index to bind. */ + Uint32 layer; /**< The layer index to bind. */ + bool cycle; /**< true cycles the texture if it is already bound. */ + Uint8 padding1; + Uint8 padding2; + Uint8 padding3; +} SDL_GPUStorageTextureReadWriteBinding; + +/* Functions */ + +/* Device */ + +/** + * Checks for GPU runtime support. + * + * \param format_flags a bitflag indicating which shader formats the app is + * able to provide. + * \param name the preferred GPU driver, or NULL to let SDL pick the optimal + * driver. + * \returns true if supported, false otherwise. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUDevice + */ +extern SDL_DECLSPEC bool SDLCALL SDL_GPUSupportsShaderFormats( + SDL_GPUShaderFormat format_flags, + const char *name); + +/** + * Checks for GPU runtime support. + * + * \param props the properties to use. + * \returns true if supported, false otherwise. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUDeviceWithProperties + */ +extern SDL_DECLSPEC bool SDLCALL SDL_GPUSupportsProperties( + SDL_PropertiesID props); + +/** + * Creates a GPU context. + * + * \param format_flags a bitflag indicating which shader formats the app is + * able to provide. + * \param debug_mode enable debug mode properties and validations. + * \param name the preferred GPU driver, or NULL to let SDL pick the optimal + * driver. + * \returns a GPU context on success or NULL on failure; call SDL_GetError() + * for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_GetGPUShaderFormats + * \sa SDL_GetGPUDeviceDriver + * \sa SDL_DestroyGPUDevice + * \sa SDL_GPUSupportsShaderFormats + */ +extern SDL_DECLSPEC SDL_GPUDevice * SDLCALL SDL_CreateGPUDevice( + SDL_GPUShaderFormat format_flags, + bool debug_mode, + const char *name); + +/** + * Creates a GPU context. + * + * These are the supported properties: + * + * - `SDL_PROP_GPU_DEVICE_CREATE_DEBUGMODE_BOOLEAN`: enable debug mode + * properties and validations, defaults to true. + * - `SDL_PROP_GPU_DEVICE_CREATE_PREFERLOWPOWER_BOOLEAN`: enable to prefer + * energy efficiency over maximum GPU performance, defaults to false. + * - `SDL_PROP_GPU_DEVICE_CREATE_NAME_STRING`: the name of the GPU driver to + * use, if a specific one is desired. + * + * These are the current shader format properties: + * + * - `SDL_PROP_GPU_DEVICE_CREATE_SHADERS_PRIVATE_BOOLEAN`: The app is able to + * provide shaders for an NDA platform. + * - `SDL_PROP_GPU_DEVICE_CREATE_SHADERS_SPIRV_BOOLEAN`: The app is able to + * provide SPIR-V shaders if applicable. + * - `SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXBC_BOOLEAN`: The app is able to + * provide DXBC shaders if applicable + * - `SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXIL_BOOLEAN`: The app is able to + * provide DXIL shaders if applicable. + * - `SDL_PROP_GPU_DEVICE_CREATE_SHADERS_MSL_BOOLEAN`: The app is able to + * provide MSL shaders if applicable. + * - `SDL_PROP_GPU_DEVICE_CREATE_SHADERS_METALLIB_BOOLEAN`: The app is able to + * provide Metal shader libraries if applicable. + * + * With the D3D12 renderer: + * + * - `SDL_PROP_GPU_DEVICE_CREATE_D3D12_SEMANTIC_NAME_STRING`: the prefix to + * use for all vertex semantics, default is "TEXCOORD". + * + * \param props the properties to use. + * \returns a GPU context on success or NULL on failure; call SDL_GetError() + * for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_GetGPUShaderFormats + * \sa SDL_GetGPUDeviceDriver + * \sa SDL_DestroyGPUDevice + * \sa SDL_GPUSupportsProperties + */ +extern SDL_DECLSPEC SDL_GPUDevice * SDLCALL SDL_CreateGPUDeviceWithProperties( + SDL_PropertiesID props); + +#define SDL_PROP_GPU_DEVICE_CREATE_DEBUGMODE_BOOLEAN "SDL.gpu.device.create.debugmode" +#define SDL_PROP_GPU_DEVICE_CREATE_PREFERLOWPOWER_BOOLEAN "SDL.gpu.device.create.preferlowpower" +#define SDL_PROP_GPU_DEVICE_CREATE_NAME_STRING "SDL.gpu.device.create.name" +#define SDL_PROP_GPU_DEVICE_CREATE_SHADERS_PRIVATE_BOOLEAN "SDL.gpu.device.create.shaders.private" +#define SDL_PROP_GPU_DEVICE_CREATE_SHADERS_SPIRV_BOOLEAN "SDL.gpu.device.create.shaders.spirv" +#define SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXBC_BOOLEAN "SDL.gpu.device.create.shaders.dxbc" +#define SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXIL_BOOLEAN "SDL.gpu.device.create.shaders.dxil" +#define SDL_PROP_GPU_DEVICE_CREATE_SHADERS_MSL_BOOLEAN "SDL.gpu.device.create.shaders.msl" +#define SDL_PROP_GPU_DEVICE_CREATE_SHADERS_METALLIB_BOOLEAN "SDL.gpu.device.create.shaders.metallib" +#define SDL_PROP_GPU_DEVICE_CREATE_D3D12_SEMANTIC_NAME_STRING "SDL.gpu.device.create.d3d12.semantic" + +/** + * Destroys a GPU context previously returned by SDL_CreateGPUDevice. + * + * \param device a GPU Context to destroy. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUDevice + */ +extern SDL_DECLSPEC void SDLCALL SDL_DestroyGPUDevice(SDL_GPUDevice *device); + +/** + * Get the number of GPU drivers compiled into SDL. + * + * \returns the number of built in GPU drivers. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_GetGPUDriver + */ +extern SDL_DECLSPEC int SDLCALL SDL_GetNumGPUDrivers(void); + +/** + * Get the name of a built in GPU driver. + * + * The GPU drivers are presented in the order in which they are normally + * checked during initialization. + * + * The names of drivers are all simple, low-ASCII identifiers, like "vulkan", + * "metal" or "direct3d12". These never have Unicode characters, and are not + * meant to be proper names. + * + * \param index the index of a GPU driver. + * \returns the name of the GPU driver with the given **index**. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_GetNumGPUDrivers + */ +extern SDL_DECLSPEC const char * SDLCALL SDL_GetGPUDriver(int index); + +/** + * Returns the name of the backend used to create this GPU context. + * + * \param device a GPU context to query. + * \returns the name of the device's driver, or NULL on error. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC const char * SDLCALL SDL_GetGPUDeviceDriver(SDL_GPUDevice *device); + +/** + * Returns the supported shader formats for this GPU context. + * + * \param device a GPU context to query. + * \returns a bitflag indicating which shader formats the driver is able to + * consume. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC SDL_GPUShaderFormat SDLCALL SDL_GetGPUShaderFormats(SDL_GPUDevice *device); + +/* State Creation */ + +/** + * Creates a pipeline object to be used in a compute workflow. + * + * Shader resource bindings must be authored to follow a particular order + * depending on the shader format. + * + * For SPIR-V shaders, use the following resource sets: + * + * - 0: Sampled textures, followed by read-only storage textures, followed by + * read-only storage buffers + * - 1: Read-write storage textures, followed by read-write storage buffers + * - 2: Uniform buffers + * + * For DXBC and DXIL shaders, use the following register order: + * + * - (t[n], space0): Sampled textures, followed by read-only storage textures, + * followed by read-only storage buffers + * - (u[n], space1): Read-write storage textures, followed by read-write + * storage buffers + * - (b[n], space2): Uniform buffers + * + * For MSL/metallib, use the following order: + * + * - [[buffer]]: Uniform buffers, followed by read-only storage buffers, + * followed by read-write storage buffers + * - [[texture]]: Sampled textures, followed by read-only storage textures, + * followed by read-write storage textures + * + * There are optional properties that can be provided through `props`. These + * are the supported properties: + * + * - `SDL_PROP_GPU_COMPUTEPIPELINE_CREATE_NAME_STRING`: a name that can be + * displayed in debugging tools. + * + * \param device a GPU Context. + * \param createinfo a struct describing the state of the compute pipeline to + * create. + * \returns a compute pipeline object on success, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_BindGPUComputePipeline + * \sa SDL_ReleaseGPUComputePipeline + */ +extern SDL_DECLSPEC SDL_GPUComputePipeline * SDLCALL SDL_CreateGPUComputePipeline( + SDL_GPUDevice *device, + const SDL_GPUComputePipelineCreateInfo *createinfo); + +#define SDL_PROP_GPU_COMPUTEPIPELINE_CREATE_NAME_STRING "SDL.gpu.computepipeline.create.name" + +/** + * Creates a pipeline object to be used in a graphics workflow. + * + * There are optional properties that can be provided through `props`. These + * are the supported properties: + * + * - `SDL_PROP_GPU_GRAPHICSPIPELINE_CREATE_NAME_STRING`: a name that can be + * displayed in debugging tools. + * + * \param device a GPU Context. + * \param createinfo a struct describing the state of the graphics pipeline to + * create. + * \returns a graphics pipeline object on success, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + * \sa SDL_BindGPUGraphicsPipeline + * \sa SDL_ReleaseGPUGraphicsPipeline + */ +extern SDL_DECLSPEC SDL_GPUGraphicsPipeline * SDLCALL SDL_CreateGPUGraphicsPipeline( + SDL_GPUDevice *device, + const SDL_GPUGraphicsPipelineCreateInfo *createinfo); + +#define SDL_PROP_GPU_GRAPHICSPIPELINE_CREATE_NAME_STRING "SDL.gpu.graphicspipeline.create.name" + +/** + * Creates a sampler object to be used when binding textures in a graphics + * workflow. + * + * There are optional properties that can be provided through `props`. These + * are the supported properties: + * + * - `SDL_PROP_GPU_SAMPLER_CREATE_NAME_STRING`: a name that can be displayed + * in debugging tools. + * + * \param device a GPU Context. + * \param createinfo a struct describing the state of the sampler to create. + * \returns a sampler object on success, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_BindGPUVertexSamplers + * \sa SDL_BindGPUFragmentSamplers + * \sa SDL_ReleaseGPUSampler + */ +extern SDL_DECLSPEC SDL_GPUSampler * SDLCALL SDL_CreateGPUSampler( + SDL_GPUDevice *device, + const SDL_GPUSamplerCreateInfo *createinfo); + +#define SDL_PROP_GPU_SAMPLER_CREATE_NAME_STRING "SDL.gpu.sampler.create.name" + +/** + * Creates a shader to be used when creating a graphics pipeline. + * + * Shader resource bindings must be authored to follow a particular order + * depending on the shader format. + * + * For SPIR-V shaders, use the following resource sets: + * + * For vertex shaders: + * + * - 0: Sampled textures, followed by storage textures, followed by storage + * buffers + * - 1: Uniform buffers + * + * For fragment shaders: + * + * - 2: Sampled textures, followed by storage textures, followed by storage + * buffers + * - 3: Uniform buffers + * + * For DXBC and DXIL shaders, use the following register order: + * + * For vertex shaders: + * + * - (t[n], space0): Sampled textures, followed by storage textures, followed + * by storage buffers + * - (s[n], space0): Samplers with indices corresponding to the sampled + * textures + * - (b[n], space1): Uniform buffers + * + * For pixel shaders: + * + * - (t[n], space2): Sampled textures, followed by storage textures, followed + * by storage buffers + * - (s[n], space2): Samplers with indices corresponding to the sampled + * textures + * - (b[n], space3): Uniform buffers + * + * For MSL/metallib, use the following order: + * + * - [[texture]]: Sampled textures, followed by storage textures + * - [[sampler]]: Samplers with indices corresponding to the sampled textures + * - [[buffer]]: Uniform buffers, followed by storage buffers. Vertex buffer 0 + * is bound at [[buffer(14)]], vertex buffer 1 at [[buffer(15)]], and so on. + * Rather than manually authoring vertex buffer indices, use the + * [[stage_in]] attribute which will automatically use the vertex input + * information from the SDL_GPUGraphicsPipeline. + * + * Shader semantics other than system-value semantics do not matter in D3D12 + * and for ease of use the SDL implementation assumes that non system-value + * semantics will all be TEXCOORD. If you are using HLSL as the shader source + * language, your vertex semantics should start at TEXCOORD0 and increment + * like so: TEXCOORD1, TEXCOORD2, etc. If you wish to change the semantic + * prefix to something other than TEXCOORD you can use + * SDL_PROP_GPU_DEVICE_CREATE_D3D12_SEMANTIC_NAME_STRING with + * SDL_CreateGPUDeviceWithProperties(). + * + * There are optional properties that can be provided through `props`. These + * are the supported properties: + * + * - `SDL_PROP_GPU_SHADER_CREATE_NAME_STRING`: a name that can be displayed in + * debugging tools. + * + * \param device a GPU Context. + * \param createinfo a struct describing the state of the shader to create. + * \returns a shader object on success, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUGraphicsPipeline + * \sa SDL_ReleaseGPUShader + */ +extern SDL_DECLSPEC SDL_GPUShader * SDLCALL SDL_CreateGPUShader( + SDL_GPUDevice *device, + const SDL_GPUShaderCreateInfo *createinfo); + +#define SDL_PROP_GPU_SHADER_CREATE_NAME_STRING "SDL.gpu.shader.create.name" + +/** + * Creates a texture object to be used in graphics or compute workflows. + * + * The contents of this texture are undefined until data is written to the + * texture. + * + * Note that certain combinations of usage flags are invalid. For example, a + * texture cannot have both the SAMPLER and GRAPHICS_STORAGE_READ flags. + * + * If you request a sample count higher than the hardware supports, the + * implementation will automatically fall back to the highest available sample + * count. + * + * There are optional properties that can be provided through + * SDL_GPUTextureCreateInfo's `props`. These are the supported properties: + * + * - `SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_R_FLOAT`: (Direct3D 12 only) if + * the texture usage is SDL_GPU_TEXTUREUSAGE_COLOR_TARGET, clear the texture + * to a color with this red intensity. Defaults to zero. + * - `SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_G_FLOAT`: (Direct3D 12 only) if + * the texture usage is SDL_GPU_TEXTUREUSAGE_COLOR_TARGET, clear the texture + * to a color with this green intensity. Defaults to zero. + * - `SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_B_FLOAT`: (Direct3D 12 only) if + * the texture usage is SDL_GPU_TEXTUREUSAGE_COLOR_TARGET, clear the texture + * to a color with this blue intensity. Defaults to zero. + * - `SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_A_FLOAT`: (Direct3D 12 only) if + * the texture usage is SDL_GPU_TEXTUREUSAGE_COLOR_TARGET, clear the texture + * to a color with this alpha intensity. Defaults to zero. + * - `SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_DEPTH_FLOAT`: (Direct3D 12 only) + * if the texture usage is SDL_GPU_TEXTUREUSAGE_DEPTH_STENCIL_TARGET, clear + * the texture to a depth of this value. Defaults to zero. + * - `SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_STENCIL_NUMBER`: (Direct3D 12 + * only) if the texture usage is SDL_GPU_TEXTUREUSAGE_DEPTH_STENCIL_TARGET, + * clear the texture to a stencil of this Uint8 value. Defaults to zero. + * - `SDL_PROP_GPU_TEXTURE_CREATE_NAME_STRING`: a name that can be displayed + * in debugging tools. + * + * \param device a GPU Context. + * \param createinfo a struct describing the state of the texture to create. + * \returns a texture object on success, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUTexture + * \sa SDL_DownloadFromGPUTexture + * \sa SDL_BindGPUVertexSamplers + * \sa SDL_BindGPUVertexStorageTextures + * \sa SDL_BindGPUFragmentSamplers + * \sa SDL_BindGPUFragmentStorageTextures + * \sa SDL_BindGPUComputeStorageTextures + * \sa SDL_BlitGPUTexture + * \sa SDL_ReleaseGPUTexture + * \sa SDL_GPUTextureSupportsFormat + */ +extern SDL_DECLSPEC SDL_GPUTexture * SDLCALL SDL_CreateGPUTexture( + SDL_GPUDevice *device, + const SDL_GPUTextureCreateInfo *createinfo); + +#define SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_R_FLOAT "SDL.gpu.texture.create.d3d12.clear.r" +#define SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_G_FLOAT "SDL.gpu.texture.create.d3d12.clear.g" +#define SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_B_FLOAT "SDL.gpu.texture.create.d3d12.clear.b" +#define SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_A_FLOAT "SDL.gpu.texture.create.d3d12.clear.a" +#define SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_DEPTH_FLOAT "SDL.gpu.texture.create.d3d12.clear.depth" +#define SDL_PROP_GPU_TEXTURE_CREATE_D3D12_CLEAR_STENCIL_NUMBER "SDL.gpu.texture.create.d3d12.clear.stencil" +#define SDL_PROP_GPU_TEXTURE_CREATE_NAME_STRING "SDL.gpu.texture.create.name" + +/** + * Creates a buffer object to be used in graphics or compute workflows. + * + * The contents of this buffer are undefined until data is written to the + * buffer. + * + * Note that certain combinations of usage flags are invalid. For example, a + * buffer cannot have both the VERTEX and INDEX flags. + * + * If you use a STORAGE flag, the data in the buffer must respect std140 + * layout conventions. In practical terms this means you must ensure that vec3 + * and vec4 fields are 16-byte aligned. + * + * For better understanding of underlying concepts and memory management with + * SDL GPU API, you may refer + * [this blog post](https://moonside.games/posts/sdl-gpu-concepts-cycling/) + * . + * + * There are optional properties that can be provided through `props`. These + * are the supported properties: + * + * - `SDL_PROP_GPU_BUFFER_CREATE_NAME_STRING`: a name that can be displayed in + * debugging tools. + * + * \param device a GPU Context. + * \param createinfo a struct describing the state of the buffer to create. + * \returns a buffer object on success, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUBuffer + * \sa SDL_DownloadFromGPUBuffer + * \sa SDL_CopyGPUBufferToBuffer + * \sa SDL_BindGPUVertexBuffers + * \sa SDL_BindGPUIndexBuffer + * \sa SDL_BindGPUVertexStorageBuffers + * \sa SDL_BindGPUFragmentStorageBuffers + * \sa SDL_DrawGPUPrimitivesIndirect + * \sa SDL_DrawGPUIndexedPrimitivesIndirect + * \sa SDL_BindGPUComputeStorageBuffers + * \sa SDL_DispatchGPUComputeIndirect + * \sa SDL_ReleaseGPUBuffer + */ +extern SDL_DECLSPEC SDL_GPUBuffer * SDLCALL SDL_CreateGPUBuffer( + SDL_GPUDevice *device, + const SDL_GPUBufferCreateInfo *createinfo); + +#define SDL_PROP_GPU_BUFFER_CREATE_NAME_STRING "SDL.gpu.buffer.create.name" + +/** + * Creates a transfer buffer to be used when uploading to or downloading from + * graphics resources. + * + * Download buffers can be particularly expensive to create, so it is good + * practice to reuse them if data will be downloaded regularly. + * + * There are optional properties that can be provided through `props`. These + * are the supported properties: + * + * - `SDL_PROP_GPU_TRANSFERBUFFER_CREATE_NAME_STRING`: a name that can be + * displayed in debugging tools. + * + * \param device a GPU Context. + * \param createinfo a struct describing the state of the transfer buffer to + * create. + * \returns a transfer buffer on success, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUBuffer + * \sa SDL_DownloadFromGPUBuffer + * \sa SDL_UploadToGPUTexture + * \sa SDL_DownloadFromGPUTexture + * \sa SDL_ReleaseGPUTransferBuffer + */ +extern SDL_DECLSPEC SDL_GPUTransferBuffer * SDLCALL SDL_CreateGPUTransferBuffer( + SDL_GPUDevice *device, + const SDL_GPUTransferBufferCreateInfo *createinfo); + +#define SDL_PROP_GPU_TRANSFERBUFFER_CREATE_NAME_STRING "SDL.gpu.transferbuffer.create.name" + +/* Debug Naming */ + +/** + * Sets an arbitrary string constant to label a buffer. + * + * You should use SDL_PROP_GPU_BUFFER_CREATE_NAME_STRING with + * SDL_CreateGPUBuffer instead of this function to avoid thread safety issues. + * + * \param device a GPU Context. + * \param buffer a buffer to attach the name to. + * \param text a UTF-8 string constant to mark as the name of the buffer. + * + * \threadsafety This function is not thread safe, you must make sure the + * buffer is not simultaneously used by any other thread. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUBuffer + */ +extern SDL_DECLSPEC void SDLCALL SDL_SetGPUBufferName( + SDL_GPUDevice *device, + SDL_GPUBuffer *buffer, + const char *text); + +/** + * Sets an arbitrary string constant to label a texture. + * + * You should use SDL_PROP_GPU_TEXTURE_CREATE_NAME_STRING with + * SDL_CreateGPUTexture instead of this function to avoid thread safety + * issues. + * + * \param device a GPU Context. + * \param texture a texture to attach the name to. + * \param text a UTF-8 string constant to mark as the name of the texture. + * + * \threadsafety This function is not thread safe, you must make sure the + * texture is not simultaneously used by any other thread. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUTexture + */ +extern SDL_DECLSPEC void SDLCALL SDL_SetGPUTextureName( + SDL_GPUDevice *device, + SDL_GPUTexture *texture, + const char *text); + +/** + * Inserts an arbitrary string label into the command buffer callstream. + * + * Useful for debugging. + * + * \param command_buffer a command buffer. + * \param text a UTF-8 string constant to insert as the label. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_InsertGPUDebugLabel( + SDL_GPUCommandBuffer *command_buffer, + const char *text); + +/** + * Begins a debug group with an arbitary name. + * + * Used for denoting groups of calls when viewing the command buffer + * callstream in a graphics debugging tool. + * + * Each call to SDL_PushGPUDebugGroup must have a corresponding call to + * SDL_PopGPUDebugGroup. + * + * On some backends (e.g. Metal), pushing a debug group during a + * render/blit/compute pass will create a group that is scoped to the native + * pass rather than the command buffer. For best results, if you push a debug + * group during a pass, always pop it in the same pass. + * + * \param command_buffer a command buffer. + * \param name a UTF-8 string constant that names the group. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_PopGPUDebugGroup + */ +extern SDL_DECLSPEC void SDLCALL SDL_PushGPUDebugGroup( + SDL_GPUCommandBuffer *command_buffer, + const char *name); + +/** + * Ends the most-recently pushed debug group. + * + * \param command_buffer a command buffer. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_PushGPUDebugGroup + */ +extern SDL_DECLSPEC void SDLCALL SDL_PopGPUDebugGroup( + SDL_GPUCommandBuffer *command_buffer); + +/* Disposal */ + +/** + * Frees the given texture as soon as it is safe to do so. + * + * You must not reference the texture after calling this function. + * + * \param device a GPU context. + * \param texture a texture to be destroyed. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUTexture( + SDL_GPUDevice *device, + SDL_GPUTexture *texture); + +/** + * Frees the given sampler as soon as it is safe to do so. + * + * You must not reference the sampler after calling this function. + * + * \param device a GPU context. + * \param sampler a sampler to be destroyed. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUSampler( + SDL_GPUDevice *device, + SDL_GPUSampler *sampler); + +/** + * Frees the given buffer as soon as it is safe to do so. + * + * You must not reference the buffer after calling this function. + * + * \param device a GPU context. + * \param buffer a buffer to be destroyed. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUBuffer( + SDL_GPUDevice *device, + SDL_GPUBuffer *buffer); + +/** + * Frees the given transfer buffer as soon as it is safe to do so. + * + * You must not reference the transfer buffer after calling this function. + * + * \param device a GPU context. + * \param transfer_buffer a transfer buffer to be destroyed. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUTransferBuffer( + SDL_GPUDevice *device, + SDL_GPUTransferBuffer *transfer_buffer); + +/** + * Frees the given compute pipeline as soon as it is safe to do so. + * + * You must not reference the compute pipeline after calling this function. + * + * \param device a GPU context. + * \param compute_pipeline a compute pipeline to be destroyed. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUComputePipeline( + SDL_GPUDevice *device, + SDL_GPUComputePipeline *compute_pipeline); + +/** + * Frees the given shader as soon as it is safe to do so. + * + * You must not reference the shader after calling this function. + * + * \param device a GPU context. + * \param shader a shader to be destroyed. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUShader( + SDL_GPUDevice *device, + SDL_GPUShader *shader); + +/** + * Frees the given graphics pipeline as soon as it is safe to do so. + * + * You must not reference the graphics pipeline after calling this function. + * + * \param device a GPU context. + * \param graphics_pipeline a graphics pipeline to be destroyed. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUGraphicsPipeline( + SDL_GPUDevice *device, + SDL_GPUGraphicsPipeline *graphics_pipeline); + +/** + * Acquire a command buffer. + * + * This command buffer is managed by the implementation and should not be + * freed by the user. The command buffer may only be used on the thread it was + * acquired on. The command buffer should be submitted on the thread it was + * acquired on. + * + * It is valid to acquire multiple command buffers on the same thread at once. + * In fact a common design pattern is to acquire two command buffers per frame + * where one is dedicated to render and compute passes and the other is + * dedicated to copy passes and other preparatory work such as generating + * mipmaps. Interleaving commands between the two command buffers reduces the + * total amount of passes overall which improves rendering performance. + * + * \param device a GPU context. + * \returns a command buffer, or NULL on failure; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_SubmitGPUCommandBuffer + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + */ +extern SDL_DECLSPEC SDL_GPUCommandBuffer * SDLCALL SDL_AcquireGPUCommandBuffer( + SDL_GPUDevice *device); + +/* Uniform Data */ + +/** + * Pushes data to a vertex uniform slot on the command buffer. + * + * Subsequent draw calls will use this uniform data. + * + * The data being pushed must respect std140 layout conventions. In practical + * terms this means you must ensure that vec3 and vec4 fields are 16-byte + * aligned. + * + * \param command_buffer a command buffer. + * \param slot_index the vertex uniform slot to push data to. + * \param data client data to write. + * \param length the length of the data to write. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_PushGPUVertexUniformData( + SDL_GPUCommandBuffer *command_buffer, + Uint32 slot_index, + const void *data, + Uint32 length); + +/** + * Pushes data to a fragment uniform slot on the command buffer. + * + * Subsequent draw calls will use this uniform data. + * + * The data being pushed must respect std140 layout conventions. In practical + * terms this means you must ensure that vec3 and vec4 fields are 16-byte + * aligned. + * + * \param command_buffer a command buffer. + * \param slot_index the fragment uniform slot to push data to. + * \param data client data to write. + * \param length the length of the data to write. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_PushGPUFragmentUniformData( + SDL_GPUCommandBuffer *command_buffer, + Uint32 slot_index, + const void *data, + Uint32 length); + +/** + * Pushes data to a uniform slot on the command buffer. + * + * Subsequent draw calls will use this uniform data. + * + * The data being pushed must respect std140 layout conventions. In practical + * terms this means you must ensure that vec3 and vec4 fields are 16-byte + * aligned. + * + * \param command_buffer a command buffer. + * \param slot_index the uniform slot to push data to. + * \param data client data to write. + * \param length the length of the data to write. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_PushGPUComputeUniformData( + SDL_GPUCommandBuffer *command_buffer, + Uint32 slot_index, + const void *data, + Uint32 length); + +/* Graphics State */ + +/** + * Begins a render pass on a command buffer. + * + * A render pass consists of a set of texture subresources (or depth slices in + * the 3D texture case) which will be rendered to during the render pass, + * along with corresponding clear values and load/store operations. All + * operations related to graphics pipelines must take place inside of a render + * pass. A default viewport and scissor state are automatically set when this + * is called. You cannot begin another render pass, or begin a compute pass or + * copy pass until you have ended the render pass. + * + * \param command_buffer a command buffer. + * \param color_target_infos an array of texture subresources with + * corresponding clear values and load/store ops. + * \param num_color_targets the number of color targets in the + * color_target_infos array. + * \param depth_stencil_target_info a texture subresource with corresponding + * clear value and load/store ops, may be + * NULL. + * \returns a render pass handle. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_EndGPURenderPass + */ +extern SDL_DECLSPEC SDL_GPURenderPass * SDLCALL SDL_BeginGPURenderPass( + SDL_GPUCommandBuffer *command_buffer, + const SDL_GPUColorTargetInfo *color_target_infos, + Uint32 num_color_targets, + const SDL_GPUDepthStencilTargetInfo *depth_stencil_target_info); + +/** + * Binds a graphics pipeline on a render pass to be used in rendering. + * + * A graphics pipeline must be bound before making any draw calls. + * + * \param render_pass a render pass handle. + * \param graphics_pipeline the graphics pipeline to bind. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUGraphicsPipeline( + SDL_GPURenderPass *render_pass, + SDL_GPUGraphicsPipeline *graphics_pipeline); + +/** + * Sets the current viewport state on a command buffer. + * + * \param render_pass a render pass handle. + * \param viewport the viewport to set. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_SetGPUViewport( + SDL_GPURenderPass *render_pass, + const SDL_GPUViewport *viewport); + +/** + * Sets the current scissor state on a command buffer. + * + * \param render_pass a render pass handle. + * \param scissor the scissor area to set. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_SetGPUScissor( + SDL_GPURenderPass *render_pass, + const SDL_Rect *scissor); + +/** + * Sets the current blend constants on a command buffer. + * + * \param render_pass a render pass handle. + * \param blend_constants the blend constant color. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_GPU_BLENDFACTOR_CONSTANT_COLOR + * \sa SDL_GPU_BLENDFACTOR_ONE_MINUS_CONSTANT_COLOR + */ +extern SDL_DECLSPEC void SDLCALL SDL_SetGPUBlendConstants( + SDL_GPURenderPass *render_pass, + SDL_FColor blend_constants); + +/** + * Sets the current stencil reference value on a command buffer. + * + * \param render_pass a render pass handle. + * \param reference the stencil reference value to set. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_SetGPUStencilReference( + SDL_GPURenderPass *render_pass, + Uint8 reference); + +/** + * Binds vertex buffers on a command buffer for use with subsequent draw + * calls. + * + * \param render_pass a render pass handle. + * \param first_slot the vertex buffer slot to begin binding from. + * \param bindings an array of SDL_GPUBufferBinding structs containing vertex + * buffers and offset values. + * \param num_bindings the number of bindings in the bindings array. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUVertexBuffers( + SDL_GPURenderPass *render_pass, + Uint32 first_slot, + const SDL_GPUBufferBinding *bindings, + Uint32 num_bindings); + +/** + * Binds an index buffer on a command buffer for use with subsequent draw + * calls. + * + * \param render_pass a render pass handle. + * \param binding a pointer to a struct containing an index buffer and offset. + * \param index_element_size whether the index values in the buffer are 16- or + * 32-bit. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUIndexBuffer( + SDL_GPURenderPass *render_pass, + const SDL_GPUBufferBinding *binding, + SDL_GPUIndexElementSize index_element_size); + +/** + * Binds texture-sampler pairs for use on the vertex shader. + * + * The textures must have been created with SDL_GPU_TEXTUREUSAGE_SAMPLER. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param render_pass a render pass handle. + * \param first_slot the vertex sampler slot to begin binding from. + * \param texture_sampler_bindings an array of texture-sampler binding + * structs. + * \param num_bindings the number of texture-sampler pairs to bind from the + * array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUVertexSamplers( + SDL_GPURenderPass *render_pass, + Uint32 first_slot, + const SDL_GPUTextureSamplerBinding *texture_sampler_bindings, + Uint32 num_bindings); + +/** + * Binds storage textures for use on the vertex shader. + * + * These textures must have been created with + * SDL_GPU_TEXTUREUSAGE_GRAPHICS_STORAGE_READ. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param render_pass a render pass handle. + * \param first_slot the vertex storage texture slot to begin binding from. + * \param storage_textures an array of storage textures. + * \param num_bindings the number of storage texture to bind from the array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUVertexStorageTextures( + SDL_GPURenderPass *render_pass, + Uint32 first_slot, + SDL_GPUTexture *const *storage_textures, + Uint32 num_bindings); + +/** + * Binds storage buffers for use on the vertex shader. + * + * These buffers must have been created with + * SDL_GPU_BUFFERUSAGE_GRAPHICS_STORAGE_READ. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param render_pass a render pass handle. + * \param first_slot the vertex storage buffer slot to begin binding from. + * \param storage_buffers an array of buffers. + * \param num_bindings the number of buffers to bind from the array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUVertexStorageBuffers( + SDL_GPURenderPass *render_pass, + Uint32 first_slot, + SDL_GPUBuffer *const *storage_buffers, + Uint32 num_bindings); + +/** + * Binds texture-sampler pairs for use on the fragment shader. + * + * The textures must have been created with SDL_GPU_TEXTUREUSAGE_SAMPLER. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param render_pass a render pass handle. + * \param first_slot the fragment sampler slot to begin binding from. + * \param texture_sampler_bindings an array of texture-sampler binding + * structs. + * \param num_bindings the number of texture-sampler pairs to bind from the + * array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUFragmentSamplers( + SDL_GPURenderPass *render_pass, + Uint32 first_slot, + const SDL_GPUTextureSamplerBinding *texture_sampler_bindings, + Uint32 num_bindings); + +/** + * Binds storage textures for use on the fragment shader. + * + * These textures must have been created with + * SDL_GPU_TEXTUREUSAGE_GRAPHICS_STORAGE_READ. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param render_pass a render pass handle. + * \param first_slot the fragment storage texture slot to begin binding from. + * \param storage_textures an array of storage textures. + * \param num_bindings the number of storage textures to bind from the array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUFragmentStorageTextures( + SDL_GPURenderPass *render_pass, + Uint32 first_slot, + SDL_GPUTexture *const *storage_textures, + Uint32 num_bindings); + +/** + * Binds storage buffers for use on the fragment shader. + * + * These buffers must have been created with + * SDL_GPU_BUFFERUSAGE_GRAPHICS_STORAGE_READ. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param render_pass a render pass handle. + * \param first_slot the fragment storage buffer slot to begin binding from. + * \param storage_buffers an array of storage buffers. + * \param num_bindings the number of storage buffers to bind from the array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUFragmentStorageBuffers( + SDL_GPURenderPass *render_pass, + Uint32 first_slot, + SDL_GPUBuffer *const *storage_buffers, + Uint32 num_bindings); + +/* Drawing */ + +/** + * Draws data using bound graphics state with an index buffer and instancing + * enabled. + * + * You must not call this function before binding a graphics pipeline. + * + * Note that the `first_vertex` and `first_instance` parameters are NOT + * compatible with built-in vertex/instance ID variables in shaders (for + * example, SV_VertexID); GPU APIs and shader languages do not define these + * built-in variables consistently, so if your shader depends on them, the + * only way to keep behavior consistent and portable is to always pass 0 for + * the correlating parameter in the draw calls. + * + * \param render_pass a render pass handle. + * \param num_indices the number of indices to draw per instance. + * \param num_instances the number of instances to draw. + * \param first_index the starting index within the index buffer. + * \param vertex_offset value added to vertex index before indexing into the + * vertex buffer. + * \param first_instance the ID of the first instance to draw. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DrawGPUIndexedPrimitives( + SDL_GPURenderPass *render_pass, + Uint32 num_indices, + Uint32 num_instances, + Uint32 first_index, + Sint32 vertex_offset, + Uint32 first_instance); + +/** + * Draws data using bound graphics state. + * + * You must not call this function before binding a graphics pipeline. + * + * Note that the `first_vertex` and `first_instance` parameters are NOT + * compatible with built-in vertex/instance ID variables in shaders (for + * example, SV_VertexID); GPU APIs and shader languages do not define these + * built-in variables consistently, so if your shader depends on them, the + * only way to keep behavior consistent and portable is to always pass 0 for + * the correlating parameter in the draw calls. + * + * \param render_pass a render pass handle. + * \param num_vertices the number of vertices to draw. + * \param num_instances the number of instances that will be drawn. + * \param first_vertex the index of the first vertex to draw. + * \param first_instance the ID of the first instance to draw. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DrawGPUPrimitives( + SDL_GPURenderPass *render_pass, + Uint32 num_vertices, + Uint32 num_instances, + Uint32 first_vertex, + Uint32 first_instance); + +/** + * Draws data using bound graphics state and with draw parameters set from a + * buffer. + * + * The buffer must consist of tightly-packed draw parameter sets that each + * match the layout of SDL_GPUIndirectDrawCommand. You must not call this + * function before binding a graphics pipeline. + * + * \param render_pass a render pass handle. + * \param buffer a buffer containing draw parameters. + * \param offset the offset to start reading from the draw buffer. + * \param draw_count the number of draw parameter sets that should be read + * from the draw buffer. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DrawGPUPrimitivesIndirect( + SDL_GPURenderPass *render_pass, + SDL_GPUBuffer *buffer, + Uint32 offset, + Uint32 draw_count); + +/** + * Draws data using bound graphics state with an index buffer enabled and with + * draw parameters set from a buffer. + * + * The buffer must consist of tightly-packed draw parameter sets that each + * match the layout of SDL_GPUIndexedIndirectDrawCommand. You must not call + * this function before binding a graphics pipeline. + * + * \param render_pass a render pass handle. + * \param buffer a buffer containing draw parameters. + * \param offset the offset to start reading from the draw buffer. + * \param draw_count the number of draw parameter sets that should be read + * from the draw buffer. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DrawGPUIndexedPrimitivesIndirect( + SDL_GPURenderPass *render_pass, + SDL_GPUBuffer *buffer, + Uint32 offset, + Uint32 draw_count); + +/** + * Ends the given render pass. + * + * All bound graphics state on the render pass command buffer is unset. The + * render pass handle is now invalid. + * + * \param render_pass a render pass handle. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_EndGPURenderPass( + SDL_GPURenderPass *render_pass); + +/* Compute Pass */ + +/** + * Begins a compute pass on a command buffer. + * + * A compute pass is defined by a set of texture subresources and buffers that + * may be written to by compute pipelines. These textures and buffers must + * have been created with the COMPUTE_STORAGE_WRITE bit or the + * COMPUTE_STORAGE_SIMULTANEOUS_READ_WRITE bit. If you do not create a texture + * with COMPUTE_STORAGE_SIMULTANEOUS_READ_WRITE, you must not read from the + * texture in the compute pass. All operations related to compute pipelines + * must take place inside of a compute pass. You must not begin another + * compute pass, or a render pass or copy pass before ending the compute pass. + * + * A VERY IMPORTANT NOTE - Reads and writes in compute passes are NOT + * implicitly synchronized. This means you may cause data races by both + * reading and writing a resource region in a compute pass, or by writing + * multiple times to a resource region. If your compute work depends on + * reading the completed output from a previous dispatch, you MUST end the + * current compute pass and begin a new one before you can safely access the + * data. Otherwise you will receive unexpected results. Reading and writing a + * texture in the same compute pass is only supported by specific texture + * formats. Make sure you check the format support! + * + * \param command_buffer a command buffer. + * \param storage_texture_bindings an array of writeable storage texture + * binding structs. + * \param num_storage_texture_bindings the number of storage textures to bind + * from the array. + * \param storage_buffer_bindings an array of writeable storage buffer binding + * structs. + * \param num_storage_buffer_bindings the number of storage buffers to bind + * from the array. + * \returns a compute pass handle. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_EndGPUComputePass + */ +extern SDL_DECLSPEC SDL_GPUComputePass * SDLCALL SDL_BeginGPUComputePass( + SDL_GPUCommandBuffer *command_buffer, + const SDL_GPUStorageTextureReadWriteBinding *storage_texture_bindings, + Uint32 num_storage_texture_bindings, + const SDL_GPUStorageBufferReadWriteBinding *storage_buffer_bindings, + Uint32 num_storage_buffer_bindings); + +/** + * Binds a compute pipeline on a command buffer for use in compute dispatch. + * + * \param compute_pass a compute pass handle. + * \param compute_pipeline a compute pipeline to bind. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUComputePipeline( + SDL_GPUComputePass *compute_pass, + SDL_GPUComputePipeline *compute_pipeline); + +/** + * Binds texture-sampler pairs for use on the compute shader. + * + * The textures must have been created with SDL_GPU_TEXTUREUSAGE_SAMPLER. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param compute_pass a compute pass handle. + * \param first_slot the compute sampler slot to begin binding from. + * \param texture_sampler_bindings an array of texture-sampler binding + * structs. + * \param num_bindings the number of texture-sampler bindings to bind from the + * array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUComputeSamplers( + SDL_GPUComputePass *compute_pass, + Uint32 first_slot, + const SDL_GPUTextureSamplerBinding *texture_sampler_bindings, + Uint32 num_bindings); + +/** + * Binds storage textures as readonly for use on the compute pipeline. + * + * These textures must have been created with + * SDL_GPU_TEXTUREUSAGE_COMPUTE_STORAGE_READ. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param compute_pass a compute pass handle. + * \param first_slot the compute storage texture slot to begin binding from. + * \param storage_textures an array of storage textures. + * \param num_bindings the number of storage textures to bind from the array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUComputeStorageTextures( + SDL_GPUComputePass *compute_pass, + Uint32 first_slot, + SDL_GPUTexture *const *storage_textures, + Uint32 num_bindings); + +/** + * Binds storage buffers as readonly for use on the compute pipeline. + * + * These buffers must have been created with + * SDL_GPU_BUFFERUSAGE_COMPUTE_STORAGE_READ. + * + * Be sure your shader is set up according to the requirements documented in + * SDL_CreateGPUShader(). + * + * \param compute_pass a compute pass handle. + * \param first_slot the compute storage buffer slot to begin binding from. + * \param storage_buffers an array of storage buffer binding structs. + * \param num_bindings the number of storage buffers to bind from the array. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_CreateGPUShader + */ +extern SDL_DECLSPEC void SDLCALL SDL_BindGPUComputeStorageBuffers( + SDL_GPUComputePass *compute_pass, + Uint32 first_slot, + SDL_GPUBuffer *const *storage_buffers, + Uint32 num_bindings); + +/** + * Dispatches compute work. + * + * You must not call this function before binding a compute pipeline. + * + * A VERY IMPORTANT NOTE If you dispatch multiple times in a compute pass, and + * the dispatches write to the same resource region as each other, there is no + * guarantee of which order the writes will occur. If the write order matters, + * you MUST end the compute pass and begin another one. + * + * \param compute_pass a compute pass handle. + * \param groupcount_x number of local workgroups to dispatch in the X + * dimension. + * \param groupcount_y number of local workgroups to dispatch in the Y + * dimension. + * \param groupcount_z number of local workgroups to dispatch in the Z + * dimension. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DispatchGPUCompute( + SDL_GPUComputePass *compute_pass, + Uint32 groupcount_x, + Uint32 groupcount_y, + Uint32 groupcount_z); + +/** + * Dispatches compute work with parameters set from a buffer. + * + * The buffer layout should match the layout of + * SDL_GPUIndirectDispatchCommand. You must not call this function before + * binding a compute pipeline. + * + * A VERY IMPORTANT NOTE If you dispatch multiple times in a compute pass, and + * the dispatches write to the same resource region as each other, there is no + * guarantee of which order the writes will occur. If the write order matters, + * you MUST end the compute pass and begin another one. + * + * \param compute_pass a compute pass handle. + * \param buffer a buffer containing dispatch parameters. + * \param offset the offset to start reading from the dispatch buffer. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DispatchGPUComputeIndirect( + SDL_GPUComputePass *compute_pass, + SDL_GPUBuffer *buffer, + Uint32 offset); + +/** + * Ends the current compute pass. + * + * All bound compute state on the command buffer is unset. The compute pass + * handle is now invalid. + * + * \param compute_pass a compute pass handle. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_EndGPUComputePass( + SDL_GPUComputePass *compute_pass); + +/* TransferBuffer Data */ + +/** + * Maps a transfer buffer into application address space. + * + * You must unmap the transfer buffer before encoding upload commands. The + * memory is owned by the graphics driver - do NOT call SDL_free() on the + * returned pointer. + * + * \param device a GPU context. + * \param transfer_buffer a transfer buffer. + * \param cycle if true, cycles the transfer buffer if it is already bound. + * \returns the address of the mapped transfer buffer memory, or NULL on + * failure; call SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void * SDLCALL SDL_MapGPUTransferBuffer( + SDL_GPUDevice *device, + SDL_GPUTransferBuffer *transfer_buffer, + bool cycle); + +/** + * Unmaps a previously mapped transfer buffer. + * + * \param device a GPU context. + * \param transfer_buffer a previously mapped transfer buffer. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_UnmapGPUTransferBuffer( + SDL_GPUDevice *device, + SDL_GPUTransferBuffer *transfer_buffer); + +/* Copy Pass */ + +/** + * Begins a copy pass on a command buffer. + * + * All operations related to copying to or from buffers or textures take place + * inside a copy pass. You must not begin another copy pass, or a render pass + * or compute pass before ending the copy pass. + * + * \param command_buffer a command buffer. + * \returns a copy pass handle. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC SDL_GPUCopyPass * SDLCALL SDL_BeginGPUCopyPass( + SDL_GPUCommandBuffer *command_buffer); + +/** + * Uploads data from a transfer buffer to a texture. + * + * The upload occurs on the GPU timeline. You may assume that the upload has + * finished in subsequent commands. + * + * You must align the data in the transfer buffer to a multiple of the texel + * size of the texture format. + * + * \param copy_pass a copy pass handle. + * \param source the source transfer buffer with image layout information. + * \param destination the destination texture region. + * \param cycle if true, cycles the texture if the texture is bound, otherwise + * overwrites the data. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_UploadToGPUTexture( + SDL_GPUCopyPass *copy_pass, + const SDL_GPUTextureTransferInfo *source, + const SDL_GPUTextureRegion *destination, + bool cycle); + +/** + * Uploads data from a transfer buffer to a buffer. + * + * The upload occurs on the GPU timeline. You may assume that the upload has + * finished in subsequent commands. + * + * \param copy_pass a copy pass handle. + * \param source the source transfer buffer with offset. + * \param destination the destination buffer with offset and size. + * \param cycle if true, cycles the buffer if it is already bound, otherwise + * overwrites the data. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_UploadToGPUBuffer( + SDL_GPUCopyPass *copy_pass, + const SDL_GPUTransferBufferLocation *source, + const SDL_GPUBufferRegion *destination, + bool cycle); + +/** + * Performs a texture-to-texture copy. + * + * This copy occurs on the GPU timeline. You may assume the copy has finished + * in subsequent commands. + * + * \param copy_pass a copy pass handle. + * \param source a source texture region. + * \param destination a destination texture region. + * \param w the width of the region to copy. + * \param h the height of the region to copy. + * \param d the depth of the region to copy. + * \param cycle if true, cycles the destination texture if the destination + * texture is bound, otherwise overwrites the data. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_CopyGPUTextureToTexture( + SDL_GPUCopyPass *copy_pass, + const SDL_GPUTextureLocation *source, + const SDL_GPUTextureLocation *destination, + Uint32 w, + Uint32 h, + Uint32 d, + bool cycle); + +/** + * Performs a buffer-to-buffer copy. + * + * This copy occurs on the GPU timeline. You may assume the copy has finished + * in subsequent commands. + * + * \param copy_pass a copy pass handle. + * \param source the buffer and offset to copy from. + * \param destination the buffer and offset to copy to. + * \param size the length of the buffer to copy. + * \param cycle if true, cycles the destination buffer if it is already bound, + * otherwise overwrites the data. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_CopyGPUBufferToBuffer( + SDL_GPUCopyPass *copy_pass, + const SDL_GPUBufferLocation *source, + const SDL_GPUBufferLocation *destination, + Uint32 size, + bool cycle); + +/** + * Copies data from a texture to a transfer buffer on the GPU timeline. + * + * This data is not guaranteed to be copied until the command buffer fence is + * signaled. + * + * \param copy_pass a copy pass handle. + * \param source the source texture region. + * \param destination the destination transfer buffer with image layout + * information. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DownloadFromGPUTexture( + SDL_GPUCopyPass *copy_pass, + const SDL_GPUTextureRegion *source, + const SDL_GPUTextureTransferInfo *destination); + +/** + * Copies data from a buffer to a transfer buffer on the GPU timeline. + * + * This data is not guaranteed to be copied until the command buffer fence is + * signaled. + * + * \param copy_pass a copy pass handle. + * \param source the source buffer with offset and size. + * \param destination the destination transfer buffer with offset. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_DownloadFromGPUBuffer( + SDL_GPUCopyPass *copy_pass, + const SDL_GPUBufferRegion *source, + const SDL_GPUTransferBufferLocation *destination); + +/** + * Ends the current copy pass. + * + * \param copy_pass a copy pass handle. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_EndGPUCopyPass( + SDL_GPUCopyPass *copy_pass); + +/** + * Generates mipmaps for the given texture. + * + * This function must not be called inside of any pass. + * + * \param command_buffer a command_buffer. + * \param texture a texture with more than 1 mip level. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_GenerateMipmapsForGPUTexture( + SDL_GPUCommandBuffer *command_buffer, + SDL_GPUTexture *texture); + +/** + * Blits from a source texture region to a destination texture region. + * + * This function must not be called inside of any pass. + * + * \param command_buffer a command buffer. + * \param info the blit info struct containing the blit parameters. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC void SDLCALL SDL_BlitGPUTexture( + SDL_GPUCommandBuffer *command_buffer, + const SDL_GPUBlitInfo *info); + +/* Submission/Presentation */ + +/** + * Determines whether a swapchain composition is supported by the window. + * + * The window must be claimed before calling this function. + * + * \param device a GPU context. + * \param window an SDL_Window. + * \param swapchain_composition the swapchain composition to check. + * \returns true if supported, false if unsupported. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_ClaimWindowForGPUDevice + */ +extern SDL_DECLSPEC bool SDLCALL SDL_WindowSupportsGPUSwapchainComposition( + SDL_GPUDevice *device, + SDL_Window *window, + SDL_GPUSwapchainComposition swapchain_composition); + +/** + * Determines whether a presentation mode is supported by the window. + * + * The window must be claimed before calling this function. + * + * \param device a GPU context. + * \param window an SDL_Window. + * \param present_mode the presentation mode to check. + * \returns true if supported, false if unsupported. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_ClaimWindowForGPUDevice + */ +extern SDL_DECLSPEC bool SDLCALL SDL_WindowSupportsGPUPresentMode( + SDL_GPUDevice *device, + SDL_Window *window, + SDL_GPUPresentMode present_mode); + +/** + * Claims a window, creating a swapchain structure for it. + * + * This must be called before SDL_AcquireGPUSwapchainTexture is called using + * the window. You should only call this function from the thread that created + * the window. + * + * The swapchain will be created with SDL_GPU_SWAPCHAINCOMPOSITION_SDR and + * SDL_GPU_PRESENTMODE_VSYNC. If you want to have different swapchain + * parameters, you must call SDL_SetGPUSwapchainParameters after claiming the + * window. + * + * \param device a GPU context. + * \param window an SDL_Window. + * \returns true on success, or false on failure; call SDL_GetError() for more + * information. + * + * \threadsafety This function should only be called from the thread that + * created the window. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + * \sa SDL_ReleaseWindowFromGPUDevice + * \sa SDL_WindowSupportsGPUPresentMode + * \sa SDL_WindowSupportsGPUSwapchainComposition + */ +extern SDL_DECLSPEC bool SDLCALL SDL_ClaimWindowForGPUDevice( + SDL_GPUDevice *device, + SDL_Window *window); + +/** + * Unclaims a window, destroying its swapchain structure. + * + * \param device a GPU context. + * \param window an SDL_Window that has been claimed. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_ClaimWindowForGPUDevice + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseWindowFromGPUDevice( + SDL_GPUDevice *device, + SDL_Window *window); + +/** + * Changes the swapchain parameters for the given claimed window. + * + * This function will fail if the requested present mode or swapchain + * composition are unsupported by the device. Check if the parameters are + * supported via SDL_WindowSupportsGPUPresentMode / + * SDL_WindowSupportsGPUSwapchainComposition prior to calling this function. + * + * SDL_GPU_PRESENTMODE_VSYNC with SDL_GPU_SWAPCHAINCOMPOSITION_SDR are always + * supported. + * + * \param device a GPU context. + * \param window an SDL_Window that has been claimed. + * \param swapchain_composition the desired composition of the swapchain. + * \param present_mode the desired present mode for the swapchain. + * \returns true if successful, false on error; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_WindowSupportsGPUPresentMode + * \sa SDL_WindowSupportsGPUSwapchainComposition + */ +extern SDL_DECLSPEC bool SDLCALL SDL_SetGPUSwapchainParameters( + SDL_GPUDevice *device, + SDL_Window *window, + SDL_GPUSwapchainComposition swapchain_composition, + SDL_GPUPresentMode present_mode); + +/** + * Configures the maximum allowed number of frames in flight. + * + * The default value when the device is created is 2. This means that after + * you have submitted 2 frames for presentation, if the GPU has not finished + * working on the first frame, SDL_AcquireGPUSwapchainTexture() will fill the + * swapchain texture pointer with NULL, and + * SDL_WaitAndAcquireGPUSwapchainTexture() will block. + * + * Higher values increase throughput at the expense of visual latency. Lower + * values decrease visual latency at the expense of throughput. + * + * Note that calling this function will stall and flush the command queue to + * prevent synchronization issues. + * + * The minimum value of allowed frames in flight is 1, and the maximum is 3. + * + * \param device a GPU context. + * \param allowed_frames_in_flight the maximum number of frames that can be + * pending on the GPU. + * \returns true if successful, false on error; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC bool SDLCALL SDL_SetGPUAllowedFramesInFlight( + SDL_GPUDevice *device, + Uint32 allowed_frames_in_flight); + +/** + * Obtains the texture format of the swapchain for the given window. + * + * Note that this format can change if the swapchain parameters change. + * + * \param device a GPU context. + * \param window an SDL_Window that has been claimed. + * \returns the texture format of the swapchain. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC SDL_GPUTextureFormat SDLCALL SDL_GetGPUSwapchainTextureFormat( + SDL_GPUDevice *device, + SDL_Window *window); + +/** + * Acquire a texture to use in presentation. + * + * When a swapchain texture is acquired on a command buffer, it will + * automatically be submitted for presentation when the command buffer is + * submitted. The swapchain texture should only be referenced by the command + * buffer used to acquire it. + * + * This function will fill the swapchain texture handle with NULL if too many + * frames are in flight. This is not an error. + * + * If you use this function, it is possible to create a situation where many + * command buffers are allocated while the rendering context waits for the GPU + * to catch up, which will cause memory usage to grow. You should use + * SDL_WaitAndAcquireGPUSwapchainTexture() unless you know what you are doing + * with timing. + * + * The swapchain texture is managed by the implementation and must not be + * freed by the user. You MUST NOT call this function from any thread other + * than the one that created the window. + * + * \param command_buffer a command buffer. + * \param window a window that has been claimed. + * \param swapchain_texture a pointer filled in with a swapchain texture + * handle. + * \param swapchain_texture_width a pointer filled in with the swapchain + * texture width, may be NULL. + * \param swapchain_texture_height a pointer filled in with the swapchain + * texture height, may be NULL. + * \returns true on success, false on error; call SDL_GetError() for more + * information. + * + * \threadsafety This function should only be called from the thread that + * created the window. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_ClaimWindowForGPUDevice + * \sa SDL_SubmitGPUCommandBuffer + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + * \sa SDL_CancelGPUCommandBuffer + * \sa SDL_GetWindowSizeInPixels + * \sa SDL_WaitForGPUSwapchain + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + * \sa SDL_SetGPUAllowedFramesInFlight + */ +extern SDL_DECLSPEC bool SDLCALL SDL_AcquireGPUSwapchainTexture( + SDL_GPUCommandBuffer *command_buffer, + SDL_Window *window, + SDL_GPUTexture **swapchain_texture, + Uint32 *swapchain_texture_width, + Uint32 *swapchain_texture_height); + +/** + * Blocks the thread until a swapchain texture is available to be acquired. + * + * \param device a GPU context. + * \param window a window that has been claimed. + * \returns true on success, false on failure; call SDL_GetError() for more + * information. + * + * \threadsafety This function should only be called from the thread that + * created the window. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_AcquireGPUSwapchainTexture + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + * \sa SDL_SetGPUAllowedFramesInFlight + */ +extern SDL_DECLSPEC bool SDLCALL SDL_WaitForGPUSwapchain( + SDL_GPUDevice *device, + SDL_Window *window); + +/** + * Blocks the thread until a swapchain texture is available to be acquired, + * and then acquires it. + * + * When a swapchain texture is acquired on a command buffer, it will + * automatically be submitted for presentation when the command buffer is + * submitted. The swapchain texture should only be referenced by the command + * buffer used to acquire it. It is an error to call + * SDL_CancelGPUCommandBuffer() after a swapchain texture is acquired. + * + * This function can fill the swapchain texture handle with NULL in certain + * cases, for example if the window is minimized. This is not an error. You + * should always make sure to check whether the pointer is NULL before + * actually using it. + * + * The swapchain texture is managed by the implementation and must not be + * freed by the user. You MUST NOT call this function from any thread other + * than the one that created the window. + * + * The swapchain texture is write-only and cannot be used as a sampler or for + * another reading operation. + * + * \param command_buffer a command buffer. + * \param window a window that has been claimed. + * \param swapchain_texture a pointer filled in with a swapchain texture + * handle. + * \param swapchain_texture_width a pointer filled in with the swapchain + * texture width, may be NULL. + * \param swapchain_texture_height a pointer filled in with the swapchain + * texture height, may be NULL. + * \returns true on success, false on error; call SDL_GetError() for more + * information. + * + * \threadsafety This function should only be called from the thread that + * created the window. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_SubmitGPUCommandBuffer + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + * \sa SDL_AcquireGPUSwapchainTexture + */ +extern SDL_DECLSPEC bool SDLCALL SDL_WaitAndAcquireGPUSwapchainTexture( + SDL_GPUCommandBuffer *command_buffer, + SDL_Window *window, + SDL_GPUTexture **swapchain_texture, + Uint32 *swapchain_texture_width, + Uint32 *swapchain_texture_height); + +/** + * Submits a command buffer so its commands can be processed on the GPU. + * + * It is invalid to use the command buffer after this is called. + * + * This must be called from the thread the command buffer was acquired on. + * + * All commands in the submission are guaranteed to begin executing before any + * command in a subsequent submission begins executing. + * + * \param command_buffer a command buffer. + * \returns true on success, false on failure; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_AcquireGPUCommandBuffer + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + * \sa SDL_AcquireGPUSwapchainTexture + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + */ +extern SDL_DECLSPEC bool SDLCALL SDL_SubmitGPUCommandBuffer( + SDL_GPUCommandBuffer *command_buffer); + +/** + * Submits a command buffer so its commands can be processed on the GPU, and + * acquires a fence associated with the command buffer. + * + * You must release this fence when it is no longer needed or it will cause a + * leak. It is invalid to use the command buffer after this is called. + * + * This must be called from the thread the command buffer was acquired on. + * + * All commands in the submission are guaranteed to begin executing before any + * command in a subsequent submission begins executing. + * + * \param command_buffer a command buffer. + * \returns a fence associated with the command buffer, or NULL on failure; + * call SDL_GetError() for more information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_AcquireGPUCommandBuffer + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + * \sa SDL_AcquireGPUSwapchainTexture + * \sa SDL_SubmitGPUCommandBuffer + * \sa SDL_ReleaseGPUFence + */ +extern SDL_DECLSPEC SDL_GPUFence * SDLCALL SDL_SubmitGPUCommandBufferAndAcquireFence( + SDL_GPUCommandBuffer *command_buffer); + +/** + * Cancels a command buffer. + * + * None of the enqueued commands are executed. + * + * It is an error to call this function after a swapchain texture has been + * acquired. + * + * This must be called from the thread the command buffer was acquired on. + * + * You must not reference the command buffer after calling this function. + * + * \param command_buffer a command buffer. + * \returns true on success, false on error; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_WaitAndAcquireGPUSwapchainTexture + * \sa SDL_AcquireGPUCommandBuffer + * \sa SDL_AcquireGPUSwapchainTexture + */ +extern SDL_DECLSPEC bool SDLCALL SDL_CancelGPUCommandBuffer( + SDL_GPUCommandBuffer *command_buffer); + +/** + * Blocks the thread until the GPU is completely idle. + * + * \param device a GPU context. + * \returns true on success, false on failure; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_WaitForGPUFences + */ +extern SDL_DECLSPEC bool SDLCALL SDL_WaitForGPUIdle( + SDL_GPUDevice *device); + +/** + * Blocks the thread until the given fences are signaled. + * + * \param device a GPU context. + * \param wait_all if 0, wait for any fence to be signaled, if 1, wait for all + * fences to be signaled. + * \param fences an array of fences to wait on. + * \param num_fences the number of fences in the fences array. + * \returns true on success, false on failure; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + * \sa SDL_WaitForGPUIdle + */ +extern SDL_DECLSPEC bool SDLCALL SDL_WaitForGPUFences( + SDL_GPUDevice *device, + bool wait_all, + SDL_GPUFence *const *fences, + Uint32 num_fences); + +/** + * Checks the status of a fence. + * + * \param device a GPU context. + * \param fence a fence. + * \returns true if the fence is signaled, false if it is not. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + */ +extern SDL_DECLSPEC bool SDLCALL SDL_QueryGPUFence( + SDL_GPUDevice *device, + SDL_GPUFence *fence); + +/** + * Releases a fence obtained from SDL_SubmitGPUCommandBufferAndAcquireFence. + * + * You must not reference the fence after calling this function. + * + * \param device a GPU context. + * \param fence a fence. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_SubmitGPUCommandBufferAndAcquireFence + */ +extern SDL_DECLSPEC void SDLCALL SDL_ReleaseGPUFence( + SDL_GPUDevice *device, + SDL_GPUFence *fence); + +/* Format Info */ + +/** + * Obtains the texel block size for a texture format. + * + * \param format the texture format you want to know the texel size of. + * \returns the texel block size of the texture format. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_UploadToGPUTexture + */ +extern SDL_DECLSPEC Uint32 SDLCALL SDL_GPUTextureFormatTexelBlockSize( + SDL_GPUTextureFormat format); + +/** + * Determines whether a texture format is supported for a given type and + * usage. + * + * \param device a GPU context. + * \param format the texture format to check. + * \param type the type of texture (2D, 3D, Cube). + * \param usage a bitmask of all usage scenarios to check. + * \returns whether the texture format is supported for this type and usage. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC bool SDLCALL SDL_GPUTextureSupportsFormat( + SDL_GPUDevice *device, + SDL_GPUTextureFormat format, + SDL_GPUTextureType type, + SDL_GPUTextureUsageFlags usage); + +/** + * Determines if a sample count for a texture format is supported. + * + * \param device a GPU context. + * \param format the texture format to check. + * \param sample_count the sample count to check. + * \returns whether the sample count is supported for this texture format. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC bool SDLCALL SDL_GPUTextureSupportsSampleCount( + SDL_GPUDevice *device, + SDL_GPUTextureFormat format, + SDL_GPUSampleCount sample_count); + +/** + * Calculate the size in bytes of a texture format with dimensions. + * + * \param format a texture format. + * \param width width in pixels. + * \param height height in pixels. + * \param depth_or_layer_count depth for 3D textures or layer count otherwise. + * \returns the size of a texture with this format and dimensions. + * + * \since This function is available since SDL 3.2.0. + */ +extern SDL_DECLSPEC Uint32 SDLCALL SDL_CalculateGPUTextureFormatSize( + SDL_GPUTextureFormat format, + Uint32 width, + Uint32 height, + Uint32 depth_or_layer_count); + +#ifdef SDL_PLATFORM_GDK + +/** + * Call this to suspend GPU operation on Xbox when you receive the + * SDL_EVENT_DID_ENTER_BACKGROUND event. + * + * Do NOT call any SDL_GPU functions after calling this function! This must + * also be called before calling SDL_GDKSuspendComplete. + * + * \param device a GPU context. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_AddEventWatch + */ +extern SDL_DECLSPEC void SDLCALL SDL_GDKSuspendGPU(SDL_GPUDevice *device); + +/** + * Call this to resume GPU operation on Xbox when you receive the + * SDL_EVENT_WILL_ENTER_FOREGROUND event. + * + * When resuming, this function MUST be called before calling any other + * SDL_GPU functions. + * + * \param device a GPU context. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_AddEventWatch + */ +extern SDL_DECLSPEC void SDLCALL SDL_GDKResumeGPU(SDL_GPUDevice *device); + +#endif /* SDL_PLATFORM_GDK */ + +#ifdef __cplusplus +} +#endif /* __cplusplus */ +#include + +#endif /* SDL_gpu_h_ */ -- cgit v1.2.3