Added SDL_SetTextureUserData() and SDL_GetTextureUserData() to associate a user-specified pointer with an SDL texture

src/dynapi/SDL_dynapi_overrides.h

@@ -815,3 +815,5 @@
 #define SDL_GameControllerSendEffect SDL_GameControllerSendEffect_REAL
 #define SDL_JoystickSendEffect SDL_JoystickSendEffect_REAL
 #define SDL_GameControllerGetSensorDataRate SDL_GameControllerGetSensorDataRate_REAL
+#define SDL_SetTextureUserData SDL_SetTextureUserData_REAL
+#define SDL_GetTextureUserData SDL_GetTextureUserData_REAL

src/dynapi/SDL_dynapi_procs.h

@@ -880,3 +880,5 @@ SDL_DYNAPI_PROC(int,SDL_FlashWindow,(SDL_Window *a, SDL_FlashOperation b),(a,b),
 SDL_DYNAPI_PROC(int,SDL_GameControllerSendEffect,(SDL_GameController *a, const void *b, int c),(a,b,c),return)
 SDL_DYNAPI_PROC(int,SDL_JoystickSendEffect,(SDL_Joystick *a, const void *b, int c),(a,b,c),return)
 SDL_DYNAPI_PROC(float,SDL_GameControllerGetSensorDataRate,(SDL_GameController *a, SDL_SensorType b),(a,b),return)
+SDL_DYNAPI_PROC(int,SDL_SetTextureUserData,(SDL_Texture *a, void *b),(a,b),return)
+SDL_DYNAPI_PROC(void*,SDL_GetTextureUserData,(SDL_Texture *a),(a),return)

src/render/SDL_render.c

@@ -1486,6 +1486,23 @@ SDL_GetTextureScaleMode(SDL_Texture * texture, SDL_ScaleMode *scaleMode)
     return 0;
 }
 
+int
+SDL_SetTextureUserData(SDL_Texture * texture, void *userdata)
+{
+    CHECK_TEXTURE_MAGIC(texture, -1);
+
+    texture->userdata = userdata;
+    return 0;
+}
+
+void *
+SDL_GetTextureUserData(SDL_Texture * texture)
+{
+    CHECK_TEXTURE_MAGIC(texture, NULL);
+
+    return texture->userdata;
+}
+
 #if SDL_HAVE_YUV
 static int
 SDL_UpdateTextureYUV(SDL_Texture * texture, const SDL_Rect * rect,

src/render/SDL_sysrender.h

@@ -58,6 +58,7 @@ struct SDL_Texture
     Uint32 last_command_generation; /* last command queue generation this texture was in. */
 
     void *driverdata;           /**< Driver specific texture representation */
+    void *userdata;
 
     SDL_Texture *prev;
     SDL_Texture *next;