Update to SDL3

1 files changed, 138 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/test/testutils.c b/src/contrib/SDL-3.2.20/test/testutils.c
new file mode 100644
index 0000000..ab044bf
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/test/testutils.c
@@ -0,0 +1,138 @@
+/*
+  Copyright (C) 1997-2025 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.
+*/
+
+#include "testutils.h"
+
+/**
+ * Return the absolute path to def in the SDL_GetBasePath() if possible, or
+ * the relative path to def on platforms that don't have a working
+ * SDL_GetBasePath(). Free the result with SDL_free.
+ *
+ * Fails and returns NULL if out of memory.
+ */
+char *GetNearbyFilename(const char *file)
+{
+    const char *base = SDL_GetBasePath();
+    char *path;
+
+    if (base) {
+        SDL_IOStream *rw;
+
+        if (SDL_asprintf(&path, "%s%s", base, file) < 0) {
+            return NULL;
+        }
+
+        rw = SDL_IOFromFile(path, "rb");
+        if (rw) {
+            SDL_CloseIO(rw);
+            return path;
+        }
+
+        /* Couldn't find the file in the base path */
+        SDL_free(path);
+    }
+
+    return SDL_strdup(file);
+}
+
+/**
+ * If user_specified is non-NULL, return a copy of it. Free with SDL_free.
+ *
+ * Otherwise, return the absolute path to def in the SDL_GetBasePath() if
+ * possible, or the relative path to def on platforms that don't have a
+ * working SDL_GetBasePath(). Free the result with SDL_free.
+ *
+ * Fails and returns NULL if out of memory.
+ */
+char *GetResourceFilename(const char *user_specified, const char *def)
+{
+    if (user_specified) {
+        return SDL_strdup(user_specified);
+    }
+    return GetNearbyFilename(def);
+}
+
+/**
+ * Load the .bmp file whose name is file, from the SDL_GetBasePath() if
+ * possible or the current working directory if not.
+ *
+ * If transparent is true, set the transparent colour from the top left pixel.
+ *
+ * If width_out is non-NULL, set it to the texture width.
+ *
+ * If height_out is non-NULL, set it to the texture height.
+ */
+SDL_Texture *LoadTexture(SDL_Renderer *renderer, const char *file, bool transparent, int *width_out, int *height_out)
+{
+    SDL_Surface *temp = NULL;
+    SDL_Texture *texture = NULL;
+    char *path;
+
+    path = GetNearbyFilename(file);
+
+    if (path) {
+        file = path;
+    }
+
+    temp = SDL_LoadBMP(file);
+    if (!temp) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError());
+    } else {
+        /* Set transparent pixel as the pixel at (0,0) */
+        if (transparent) {
+            if (SDL_GetSurfacePalette(temp)) {
+                const Uint8 bpp = SDL_BITSPERPIXEL(temp->format);
+                const Uint8 mask = (1 << bpp) - 1;
+                if (SDL_PIXELORDER(temp->format) == SDL_BITMAPORDER_4321)
+                    SDL_SetSurfaceColorKey(temp, true, (*(Uint8 *)temp->pixels) & mask);
+                else
+                    SDL_SetSurfaceColorKey(temp, true, ((*(Uint8 *)temp->pixels) >> (8 - bpp)) & mask);
+            } else {
+                switch (SDL_BITSPERPIXEL(temp->format)) {
+                case 15:
+                    SDL_SetSurfaceColorKey(temp, true,
+                                    (*(Uint16 *)temp->pixels) & 0x00007FFF);
+                    break;
+                case 16:
+                    SDL_SetSurfaceColorKey(temp, true, *(Uint16 *)temp->pixels);
+                    break;
+                case 24:
+                    SDL_SetSurfaceColorKey(temp, true,
+                                    (*(Uint32 *)temp->pixels) & 0x00FFFFFF);
+                    break;
+                case 32:
+                    SDL_SetSurfaceColorKey(temp, true, *(Uint32 *)temp->pixels);
+                    break;
+                }
+            }
+        }
+
+        if (width_out) {
+            *width_out = temp->w;
+        }
+
+        if (height_out) {
+            *height_out = temp->h;
+        }
+
+        texture = SDL_CreateTextureFromSurface(renderer, temp);
+        if (!texture) {
+            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s", SDL_GetError());
+        }
+    }
+    SDL_DestroySurface(temp);
+    if (path) {
+        SDL_free(path);
+    }
+    return texture;
+}