4 files changed, 71 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/examples/renderer/01-clear/README.txt b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/README.txt
new file mode 100644
index 0000000..ce9ef81
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/README.txt
@@ -0,0 +1,3 @@
+This example code creates an SDL window and renderer, and then clears the
+window to a different color every frame, so you'll effectively get a window
+that's smoothly fading between colors.
diff --git a/src/contrib/SDL-3.2.20/examples/renderer/01-clear/clear.c b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/clear.c
new file mode 100644
index 0000000..5b2b7dc
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/clear.c
@@ -0,0 +1,68 @@
+/*
+ * This example code creates an SDL window and renderer, and then clears the
+ * window to a different color every frame, so you'll effectively get a window
+ * that's smoothly fading between colors.
+ *
+ * This code is public domain. Feel free to use it for any purpose!
+ */
+
+#define SDL_MAIN_USE_CALLBACKS 1  /* use the callbacks instead of main() */
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+
+/* We will use this renderer to draw into this window every frame. */
+static SDL_Window *window = NULL;
+static SDL_Renderer *renderer = NULL;
+
+/* This function runs once at startup. */
+SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
+{
+    SDL_SetAppMetadata("Example Renderer Clear", "1.0", "com.example.renderer-clear");
+
+    if (!SDL_Init(SDL_INIT_VIDEO)) {
+        SDL_Log("Couldn't initialize SDL: %s", SDL_GetError());
+        return SDL_APP_FAILURE;
+    }
+
+    if (!SDL_CreateWindowAndRenderer("examples/renderer/clear", 640, 480, 0, &window, &renderer)) {
+        SDL_Log("Couldn't create window/renderer: %s", SDL_GetError());
+        return SDL_APP_FAILURE;
+    }
+
+    return SDL_APP_CONTINUE;  /* carry on with the program! */
+}
+
+/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
+{
+    if (event->type == SDL_EVENT_QUIT) {
+        return SDL_APP_SUCCESS;  /* end the program, reporting success to the OS. */
+    }
+    return SDL_APP_CONTINUE;  /* carry on with the program! */
+}
+
+/* This function runs once per frame, and is the heart of the program. */
+SDL_AppResult SDL_AppIterate(void *appstate)
+{
+    const double now = ((double)SDL_GetTicks()) / 1000.0;  /* convert from milliseconds to seconds. */
+    /* choose the color for the frame we will draw. The sine wave trick makes it fade between colors smoothly. */
+    const float red = (float) (0.5 + 0.5 * SDL_sin(now));
+    const float green = (float) (0.5 + 0.5 * SDL_sin(now + SDL_PI_D * 2 / 3));
+    const float blue = (float) (0.5 + 0.5 * SDL_sin(now + SDL_PI_D * 4 / 3));
+    SDL_SetRenderDrawColorFloat(renderer, red, green, blue, SDL_ALPHA_OPAQUE_FLOAT);  /* new color, full alpha. */
+
+    /* clear the window to the draw color. */
+    SDL_RenderClear(renderer);
+
+    /* put the newly-cleared rendering on the screen. */
+    SDL_RenderPresent(renderer);
+
+    return SDL_APP_CONTINUE;  /* carry on with the program! */
+}
+
+/* This function runs once at shutdown. */
+void SDL_AppQuit(void *appstate, SDL_AppResult result)
+{
+    /* SDL will clean up the window/renderer for us. */
+}
+
diff --git a/src/contrib/SDL-3.2.20/examples/renderer/01-clear/onmouseover.webp b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/onmouseover.webp
new file mode 100644
index 0000000..a0062fe
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/onmouseover.webp
diff --git a/src/contrib/SDL-3.2.20/examples/renderer/01-clear/thumbnail.png b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/thumbnail.png
new file mode 100644
index 0000000..b255675
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/examples/renderer/01-clear/thumbnail.png