1 files changed, 69 insertions, 0 deletions
diff --git a/tests/sdl_image_prepare_data.c b/tests/sdl_image_prepare_data.c
new file mode 100644
index 00000000..87e33399
--- /dev/null
+++ b/tests/sdl_image_prepare_data.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <SDL/SDL.h>
+#include <SDL/SDL_image.h>
+#include <assert.h>
+#include <emscripten.h>
+
+SDL_Surface* screen;
+
+int testImage(const char* fileName) {
+  printf("IMG_Load: %s\n", fileName);
+  SDL_Surface *image = IMG_Load(fileName);
+  if (!image)
+  {
+     printf("IMG_Load: %s\n", IMG_GetError());
+     return 0;
+  }
+  assert(image->format->BitsPerPixel == 32);
+  assert(image->format->BytesPerPixel == 4);
+  assert(image->pitch == 4*image->w);
+  int result = image->w;
+
+  SDL_BlitSurface (image, NULL, screen, NULL);
+  SDL_FreeSurface (image);
+
+  return result;
+}
+
+void ready(void *arg, const char *fileName) {
+  printf("ready! %s (%d)\n", fileName, (int)arg);
+
+  static int first = 1;
+  static const char *seenName;
+  static void *seenArg;
+  if (first) {
+    first = 0;
+    seenName = fileName;
+    seenArg = arg;
+  } else {
+    printf("%s ? %s == %d\n", fileName, seenName, strcmp(fileName, seenName));
+    assert(strcmp(fileName, seenName)); // different names
+
+    assert(seenArg != arg); // different args
+
+    testImage(seenName);
+
+    free(seenName); // As the API docs say, we are responsible for freeing the 'fake' names we are given
+
+    SDL_Flip(screen);
+  }
+}
+
+int main() {
+  SDL_Init(SDL_INIT_VIDEO);
+  screen = SDL_SetVideoMode(600, 450, 32, SDL_SWSURFACE);
+
+  printf("prepare..\n");
+
+  #define SIZE 203164
+  FILE *f = open("screenshot.not", "rb");
+  char *buffer = malloc(SIZE);
+  fread(buffer, SIZE, 1, f);
+  fclose(f);
+
+  emscripten_async_prepare_data(buffer, SIZE, "jpg", (void*)25, ready, NULL);
+  emscripten_async_prepare_data(buffer, SIZE, "jpg", (void*)33, ready, NULL); // twice to see different filenames
+
+  return 0;
+}
+