Squashed 'external/SDL/' content from commit 716c767b7

git-subtree-dir: external/SDL
git-subtree-split: 716c767b7e7099fb0e2fda9db59227a7e1d1d8a4

test/testutils.h

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+/*
+  Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
+  Copyright 2022 Collabora Ltd.
+
+  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.
+*/
+
+#ifndef TESTUTILS_H
+#define TESTUTILS_H
+
+#include <SDL3/SDL.h>
+
+SDL_Texture *LoadTexture(SDL_Renderer *renderer, const char *file, bool transparent);
+char *GetNearbyFilename(const char *file);
+char *GetResourceFilename(const char *user_specified, const char *def);
+
+#endif