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 --- .../SDL-3.2.20/include/SDL3/SDL_blendmode.h | 202 +++++++++++++++++++++ 1 file changed, 202 insertions(+) create mode 100644 src/contrib/SDL-3.2.20/include/SDL3/SDL_blendmode.h (limited to 'src/contrib/SDL-3.2.20/include/SDL3/SDL_blendmode.h') diff --git a/src/contrib/SDL-3.2.20/include/SDL3/SDL_blendmode.h b/src/contrib/SDL-3.2.20/include/SDL3/SDL_blendmode.h new file mode 100644 index 0000000..8f00cbc --- /dev/null +++ b/src/contrib/SDL-3.2.20/include/SDL3/SDL_blendmode.h @@ -0,0 +1,202 @@ +/* + 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. +*/ + +/** + * # CategoryBlendmode + * + * Blend modes decide how two colors will mix together. There are both + * standard modes for basic needs and a means to create custom modes, + * dictating what sort of math to do on what color components. + */ + +#ifndef SDL_blendmode_h_ +#define SDL_blendmode_h_ + +#include + +#include +/* Set up for C function definitions, even when using C++ */ +#ifdef __cplusplus +extern "C" { +#endif + +/** + * A set of blend modes used in drawing operations. + * + * These predefined blend modes are supported everywhere. + * + * Additional values may be obtained from SDL_ComposeCustomBlendMode. + * + * \since This datatype is available since SDL 3.2.0. + * + * \sa SDL_ComposeCustomBlendMode + */ +typedef Uint32 SDL_BlendMode; + +#define SDL_BLENDMODE_NONE 0x00000000u /**< no blending: dstRGBA = srcRGBA */ +#define SDL_BLENDMODE_BLEND 0x00000001u /**< alpha blending: dstRGB = (srcRGB * srcA) + (dstRGB * (1-srcA)), dstA = srcA + (dstA * (1-srcA)) */ +#define SDL_BLENDMODE_BLEND_PREMULTIPLIED 0x00000010u /**< pre-multiplied alpha blending: dstRGBA = srcRGBA + (dstRGBA * (1-srcA)) */ +#define SDL_BLENDMODE_ADD 0x00000002u /**< additive blending: dstRGB = (srcRGB * srcA) + dstRGB, dstA = dstA */ +#define SDL_BLENDMODE_ADD_PREMULTIPLIED 0x00000020u /**< pre-multiplied additive blending: dstRGB = srcRGB + dstRGB, dstA = dstA */ +#define SDL_BLENDMODE_MOD 0x00000004u /**< color modulate: dstRGB = srcRGB * dstRGB, dstA = dstA */ +#define SDL_BLENDMODE_MUL 0x00000008u /**< color multiply: dstRGB = (srcRGB * dstRGB) + (dstRGB * (1-srcA)), dstA = dstA */ +#define SDL_BLENDMODE_INVALID 0x7FFFFFFFu + +/** + * The blend operation used when combining source and destination pixel + * components. + * + * \since This enum is available since SDL 3.2.0. + */ +typedef enum SDL_BlendOperation +{ + SDL_BLENDOPERATION_ADD = 0x1, /**< dst + src: supported by all renderers */ + SDL_BLENDOPERATION_SUBTRACT = 0x2, /**< src - dst : supported by D3D, OpenGL, OpenGLES, and Vulkan */ + SDL_BLENDOPERATION_REV_SUBTRACT = 0x3, /**< dst - src : supported by D3D, OpenGL, OpenGLES, and Vulkan */ + SDL_BLENDOPERATION_MINIMUM = 0x4, /**< min(dst, src) : supported by D3D, OpenGL, OpenGLES, and Vulkan */ + SDL_BLENDOPERATION_MAXIMUM = 0x5 /**< max(dst, src) : supported by D3D, OpenGL, OpenGLES, and Vulkan */ +} SDL_BlendOperation; + +/** + * The normalized factor used to multiply pixel components. + * + * The blend factors are multiplied with the pixels from a drawing operation + * (src) and the pixels from the render target (dst) before the blend + * operation. The comma-separated factors listed above are always applied in + * the component order red, green, blue, and alpha. + * + * \since This enum is available since SDL 3.2.0. + */ +typedef enum SDL_BlendFactor +{ + SDL_BLENDFACTOR_ZERO = 0x1, /**< 0, 0, 0, 0 */ + SDL_BLENDFACTOR_ONE = 0x2, /**< 1, 1, 1, 1 */ + SDL_BLENDFACTOR_SRC_COLOR = 0x3, /**< srcR, srcG, srcB, srcA */ + SDL_BLENDFACTOR_ONE_MINUS_SRC_COLOR = 0x4, /**< 1-srcR, 1-srcG, 1-srcB, 1-srcA */ + SDL_BLENDFACTOR_SRC_ALPHA = 0x5, /**< srcA, srcA, srcA, srcA */ + SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA = 0x6, /**< 1-srcA, 1-srcA, 1-srcA, 1-srcA */ + SDL_BLENDFACTOR_DST_COLOR = 0x7, /**< dstR, dstG, dstB, dstA */ + SDL_BLENDFACTOR_ONE_MINUS_DST_COLOR = 0x8, /**< 1-dstR, 1-dstG, 1-dstB, 1-dstA */ + SDL_BLENDFACTOR_DST_ALPHA = 0x9, /**< dstA, dstA, dstA, dstA */ + SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA = 0xA /**< 1-dstA, 1-dstA, 1-dstA, 1-dstA */ +} SDL_BlendFactor; + +/** + * Compose a custom blend mode for renderers. + * + * The functions SDL_SetRenderDrawBlendMode and SDL_SetTextureBlendMode accept + * the SDL_BlendMode returned by this function if the renderer supports it. + * + * A blend mode controls how the pixels from a drawing operation (source) get + * combined with the pixels from the render target (destination). First, the + * components of the source and destination pixels get multiplied with their + * blend factors. Then, the blend operation takes the two products and + * calculates the result that will get stored in the render target. + * + * Expressed in pseudocode, it would look like this: + * + * ```c + * dstRGB = colorOperation(srcRGB * srcColorFactor, dstRGB * dstColorFactor); + * dstA = alphaOperation(srcA * srcAlphaFactor, dstA * dstAlphaFactor); + * ``` + * + * Where the functions `colorOperation(src, dst)` and `alphaOperation(src, + * dst)` can return one of the following: + * + * - `src + dst` + * - `src - dst` + * - `dst - src` + * - `min(src, dst)` + * - `max(src, dst)` + * + * The red, green, and blue components are always multiplied with the first, + * second, and third components of the SDL_BlendFactor, respectively. The + * fourth component is not used. + * + * The alpha component is always multiplied with the fourth component of the + * SDL_BlendFactor. The other components are not used in the alpha + * calculation. + * + * Support for these blend modes varies for each renderer. To check if a + * specific SDL_BlendMode is supported, create a renderer and pass it to + * either SDL_SetRenderDrawBlendMode or SDL_SetTextureBlendMode. They will + * return with an error if the blend mode is not supported. + * + * This list describes the support of custom blend modes for each renderer. + * All renderers support the four blend modes listed in the SDL_BlendMode + * enumeration. + * + * - **direct3d**: Supports all operations with all factors. However, some + * factors produce unexpected results with `SDL_BLENDOPERATION_MINIMUM` and + * `SDL_BLENDOPERATION_MAXIMUM`. + * - **direct3d11**: Same as Direct3D 9. + * - **opengl**: Supports the `SDL_BLENDOPERATION_ADD` operation with all + * factors. OpenGL versions 1.1, 1.2, and 1.3 do not work correctly here. + * - **opengles2**: Supports the `SDL_BLENDOPERATION_ADD`, + * `SDL_BLENDOPERATION_SUBTRACT`, `SDL_BLENDOPERATION_REV_SUBTRACT` + * operations with all factors. + * - **psp**: No custom blend mode support. + * - **software**: No custom blend mode support. + * + * Some renderers do not provide an alpha component for the default render + * target. The `SDL_BLENDFACTOR_DST_ALPHA` and + * `SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA` factors do not have an effect in this + * case. + * + * \param srcColorFactor the SDL_BlendFactor applied to the red, green, and + * blue components of the source pixels. + * \param dstColorFactor the SDL_BlendFactor applied to the red, green, and + * blue components of the destination pixels. + * \param colorOperation the SDL_BlendOperation used to combine the red, + * green, and blue components of the source and + * destination pixels. + * \param srcAlphaFactor the SDL_BlendFactor applied to the alpha component of + * the source pixels. + * \param dstAlphaFactor the SDL_BlendFactor applied to the alpha component of + * the destination pixels. + * \param alphaOperation the SDL_BlendOperation used to combine the alpha + * component of the source and destination pixels. + * \returns an SDL_BlendMode that represents the chosen factors and + * operations. + * + * \threadsafety It is safe to call this function from any thread. + * + * \since This function is available since SDL 3.2.0. + * + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_GetRenderDrawBlendMode + * \sa SDL_SetTextureBlendMode + * \sa SDL_GetTextureBlendMode + */ +extern SDL_DECLSPEC SDL_BlendMode SDLCALL SDL_ComposeCustomBlendMode(SDL_BlendFactor srcColorFactor, + SDL_BlendFactor dstColorFactor, + SDL_BlendOperation colorOperation, + SDL_BlendFactor srcAlphaFactor, + SDL_BlendFactor dstAlphaFactor, + SDL_BlendOperation alphaOperation); + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +} +#endif +#include + +#endif /* SDL_blendmode_h_ */ -- cgit v1.2.3