some fixes to the testshape.c code so it more correctly works.

test/testshape.c

@@ -19,12 +19,11 @@
 #define SHAPED_WINDOW_Y 150
 #define SHAPED_WINDOW_DIMENSION 640
 
-#define TICK_INTERVAL 1000/10
-
 typedef struct LoadedPicture {
     SDL_Surface *surface;
     SDL_Texture *texture;
     SDL_WindowShapeMode mode;
+    const char* name;
 } LoadedPicture;
 
 void render(SDL_Renderer *renderer,SDL_Texture *texture,SDL_Rect texture_dimensions)
@@ -39,17 +38,6 @@ void render(SDL_Renderer *renderer,SDL_Texture *texture,SDL_Rect texture_dimensi
     SDL_RenderPresent(renderer);
 }
 
-static Uint32 next_time;
-
-Uint32 time_left()
-{
-    Uint32 now = SDL_GetTicks();
-    if(next_time <= now)
-        return 0;
-    else
-        return next_time - now;
-}
-
 int main(int argc,char** argv)
 {
     Uint8 num_pictures;
@@ -87,18 +75,19 @@ int main(int argc,char** argv)
         pictures[i].surface = NULL;
     for(i=0;i<num_pictures;i++) {
         pictures[i].surface = SDL_LoadBMP(argv[i+1]);
+        pictures[i].name = argv[i+1];
         if(pictures[i].surface == NULL) {
             j = 0;
             for(j=0;j<num_pictures;j++)
                 SDL_FreeSurface(pictures[j].surface);
             SDL_free(pictures);
             SDL_VideoQuit();
-            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not load surface from named bitmap file.");
+            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not load surface from named bitmap file: %s", argv[i+1]);
             exit(-3);
         }
 
         format = pictures[i].surface->format;
-        if(format->Amask != 0) {
+        if(SDL_ISPIXELFORMAT_ALPHA(format->format)) {
             pictures[i].mode.mode = ShapeModeBinarizeAlpha;
             pictures[i].mode.parameters.binarizationCutoff = 255;
         }
@@ -108,7 +97,11 @@ int main(int argc,char** argv)
         }
     }
 
-    window = SDL_CreateShapedWindow("SDL_Shape test",SHAPED_WINDOW_X,SHAPED_WINDOW_Y,SHAPED_WINDOW_DIMENSION,SHAPED_WINDOW_DIMENSION,SDL_WINDOW_RESIZABLE);
+    window = SDL_CreateShapedWindow("SDL_Shape test",
+        SHAPED_WINDOW_X, SHAPED_WINDOW_Y,
+        SHAPED_WINDOW_DIMENSION,SHAPED_WINDOW_DIMENSION,
+        0);
+    SDL_SetWindowPosition(window, SHAPED_WINDOW_X, SHAPED_WINDOW_Y);
     if(window == NULL) {
         for(i=0;i<num_pictures;i++)
             SDL_FreeSurface(pictures[i].surface);
@@ -157,23 +150,26 @@ int main(int argc,char** argv)
     texture_dimensions.w = 0;
     texture_dimensions.x = 0;
     texture_dimensions.y = 0;
+    SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
     SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);
     SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
     SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);
-    next_time = SDL_GetTicks() + TICK_INTERVAL;
     while(should_exit == 0) {
         event_pending = SDL_PollEvent(&event);
         if(event_pending == 1) {
             if(event.type == SDL_KEYDOWN) {
                 button_down = 1;
-                if(event.key.keysym.sym == SDLK_ESCAPE)
+                if(event.key.keysym.sym == SDLK_ESCAPE) {
                     should_exit = 1;
+                    break;
+                }
             }
             if(button_down && event.type == SDL_KEYUP) {
                 button_down = 0;
                 current_picture += 1;
                 if(current_picture >= num_pictures)
                     current_picture = 0;
+                SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
                 SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);
                 SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
                 SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);
@@ -183,8 +179,7 @@ int main(int argc,char** argv)
             event_pending = 0;
         }
         render(renderer,pictures[current_picture].texture,texture_dimensions);
-        SDL_Delay(time_left());
-        next_time += TICK_INTERVAL;
+        SDL_Delay(10);
     }
 
     /* Free the textures. */