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diff --git a/dependencies/SDL/SDL_test_images.h b/dependencies/SDL/SDL_test_images.h
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+++ b/dependencies/SDL/SDL_test_images.h
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+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2022 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.
+*/
+
+/**
+ *  \file SDL_test_images.h
+ *
+ *  Include file for SDL test framework.
+ *
+ *  This code is a part of the SDL2_test library, not the main SDL library.
+ */
+
+/*
+
+ Defines some images for tests.
+
+*/
+
+#ifndef SDL_test_images_h_
+#define SDL_test_images_h_
+
+#include "SDL.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *Type for test images.
+ */
+typedef struct SDLTest_SurfaceImage_s {
+  int width;
+  int height;
+  unsigned int bytes_per_pixel; /* 3:RGB, 4:RGBA */
+  const char *pixel_data;
+} SDLTest_SurfaceImage_t;
+
+/* Test images */
+SDL_Surface *SDLTest_ImageBlit(void);
+SDL_Surface *SDLTest_ImageBlitColor(void);
+SDL_Surface *SDLTest_ImageBlitAlpha(void);
+SDL_Surface *SDLTest_ImageBlitBlendAdd(void);
+SDL_Surface *SDLTest_ImageBlitBlend(void);
+SDL_Surface *SDLTest_ImageBlitBlendMod(void);
+SDL_Surface *SDLTest_ImageBlitBlendNone(void);
+SDL_Surface *SDLTest_ImageBlitBlendAll(void);
+SDL_Surface *SDLTest_ImageFace(void);
+SDL_Surface *SDLTest_ImagePrimitives(void);
+SDL_Surface *SDLTest_ImagePrimitivesBlend(void);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* SDL_test_images_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */