Update to SDL3

1 files changed, 184 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/include/SDL3/SDL_touch.h b/src/contrib/SDL-3.2.20/include/SDL3/SDL_touch.h
new file mode 100644
index 0000000..64845a1
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/include/SDL3/SDL_touch.h
@@ -0,0 +1,184 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  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.
+*/
+
+/**
+ * # CategoryTouch
+ *
+ * SDL offers touch input, on platforms that support it. It can manage
+ * multiple touch devices and track multiple fingers on those devices.
+ *
+ * Touches are mostly dealt with through the event system, in the
+ * SDL_EVENT_FINGER_DOWN, SDL_EVENT_FINGER_MOTION, and SDL_EVENT_FINGER_UP
+ * events, but there are also functions to query for hardware details, etc.
+ *
+ * The touch system, by default, will also send virtual mouse events; this can
+ * be useful for making a some desktop apps work on a phone without
+ * significant changes. For apps that care about mouse and touch input
+ * separately, they should ignore mouse events that have a `which` field of
+ * SDL_TOUCH_MOUSEID.
+ */
+
+#ifndef SDL_touch_h_
+#define SDL_touch_h_
+
+#include <SDL3/SDL_stdinc.h>
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_mouse.h>
+
+#include <SDL3/SDL_begin_code.h>
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * A unique ID for a touch device.
+ *
+ * This ID is valid for the time the device is connected to the system, and is
+ * never reused for the lifetime of the application.
+ *
+ * The value 0 is an invalid ID.
+ *
+ * \since This datatype is available since SDL 3.2.0.
+ */
+typedef Uint64 SDL_TouchID;
+
+/**
+ * A unique ID for a single finger on a touch device.
+ *
+ * This ID is valid for the time the finger (stylus, etc) is touching and will
+ * be unique for all fingers currently in contact, so this ID tracks the
+ * lifetime of a single continuous touch. This value may represent an index, a
+ * pointer, or some other unique ID, depending on the platform.
+ *
+ * The value 0 is an invalid ID.
+ *
+ * \since This datatype is available since SDL 3.2.0.
+ */
+typedef Uint64 SDL_FingerID;
+
+/**
+ * An enum that describes the type of a touch device.
+ *
+ * \since This enum is available since SDL 3.2.0.
+ */
+typedef enum SDL_TouchDeviceType
+{
+    SDL_TOUCH_DEVICE_INVALID = -1,
+    SDL_TOUCH_DEVICE_DIRECT,            /**< touch screen with window-relative coordinates */
+    SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE, /**< trackpad with absolute device coordinates */
+    SDL_TOUCH_DEVICE_INDIRECT_RELATIVE  /**< trackpad with screen cursor-relative coordinates */
+} SDL_TouchDeviceType;
+
+/**
+ * Data about a single finger in a multitouch event.
+ *
+ * Each touch event is a collection of fingers that are simultaneously in
+ * contact with the touch device (so a "touch" can be a "multitouch," in
+ * reality), and this struct reports details of the specific fingers.
+ *
+ * \since This struct is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetTouchFingers
+ */
+typedef struct SDL_Finger
+{
+    SDL_FingerID id;  /**< the finger ID */
+    float x;  /**< the x-axis location of the touch event, normalized (0...1) */
+    float y;  /**< the y-axis location of the touch event, normalized (0...1) */
+    float pressure; /**< the quantity of pressure applied, normalized (0...1) */
+} SDL_Finger;
+
+/**
+ * The SDL_MouseID for mouse events simulated with touch input.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_TOUCH_MOUSEID ((SDL_MouseID)-1)
+
+/**
+ * The SDL_TouchID for touch events simulated with mouse input.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_MOUSE_TOUCHID ((SDL_TouchID)-1)
+
+
+/**
+ * Get a list of registered touch devices.
+ *
+ * On some platforms SDL first sees the touch device if it was actually used.
+ * Therefore the returned list might be empty, although devices are available.
+ * After using all devices at least once the number will be correct.
+ *
+ * \param count a pointer filled in with the number of devices returned, may
+ *              be NULL.
+ * \returns a 0 terminated array of touch device IDs or NULL on failure; call
+ *          SDL_GetError() for more information. This should be freed with
+ *          SDL_free() when it is no longer needed.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_TouchID * SDLCALL SDL_GetTouchDevices(int *count);
+
+/**
+ * Get the touch device name as reported from the driver.
+ *
+ * \param touchID the touch device instance ID.
+ * \returns touch device name, or NULL on failure; call SDL_GetError() for
+ *          more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC const char * SDLCALL SDL_GetTouchDeviceName(SDL_TouchID touchID);
+
+/**
+ * Get the type of the given touch device.
+ *
+ * \param touchID the ID of a touch device.
+ * \returns touch device type.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_TouchDeviceType SDLCALL SDL_GetTouchDeviceType(SDL_TouchID touchID);
+
+/**
+ * Get a list of active fingers for a given touch device.
+ *
+ * \param touchID the ID of a touch device.
+ * \param count a pointer filled in with the number of fingers returned, can
+ *              be NULL.
+ * \returns a NULL terminated array of SDL_Finger pointers or NULL on failure;
+ *          call SDL_GetError() for more information. This is a single
+ *          allocation that should be freed with SDL_free() when it is no
+ *          longer needed.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_Finger ** SDLCALL SDL_GetTouchFingers(SDL_TouchID touchID, int *count);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include <SDL3/SDL_close_code.h>
+
+#endif /* SDL_touch_h_ */