Fixed testshape on high DPI displays

Since the shape is set based on the pixels in the image, we want the window to have the same number of pixels.

src/video/windows/SDL_windowsshape.c

@@ -80,9 +80,7 @@ int Win32_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_Windo
 
     if ((shaper == NULL) ||
         (shape == NULL) ||
-        ((shape->format->Amask == 0) && (shape_mode->mode != ShapeModeColorKey)) ||
-        (shape->w != shaper->window->w) ||
-        (shape->h != shaper->window->h)) {
+        ((shape->format->Amask == 0) && (shape_mode->mode != ShapeModeColorKey))) {
         return SDL_INVALID_SHAPE_ARGUMENT;
     }
 

test/testshape.c

@@ -42,6 +42,7 @@ int main(int argc, char **argv)
     Uint8 num_pictures;
     LoadedPicture *pictures;
     int i, j;
+    const SDL_DisplayMode *mode;
     SDL_PixelFormat *format = NULL;
     SDL_Window *window;
     SDL_Renderer *renderer;
@@ -66,6 +67,12 @@ int main(int argc, char **argv)
         exit(-2);
     }
 
+    mode = SDL_GetDesktopDisplayMode(SDL_GetPrimaryDisplay());
+    if (!mode) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't get desktop display mode: %s", SDL_GetError());
+        exit(-2);
+    }
+
     num_pictures = argc - 1;
     pictures = (LoadedPicture *)SDL_malloc(sizeof(LoadedPicture) * num_pictures);
     if (pictures == NULL) {
@@ -151,7 +158,8 @@ int main(int argc, char **argv)
     button_down = 0;
     SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
     SDL_QueryTexture(pictures[current_picture].texture, &pixelFormat, &access, &w, &h);
-    SDL_SetWindowSize(window, w, h);
+    /* We want to set the window size in pixels */
+    SDL_SetWindowSize(window, (int)SDL_ceilf(w / mode->display_scale), (int)SDL_ceilf(h / mode->display_scale));
     SDL_SetWindowShape(window, pictures[current_picture].surface, &pictures[current_picture].mode);
     while (should_exit == 0) {
         while (SDL_PollEvent(&event)) {
@@ -170,7 +178,7 @@ int main(int argc, char **argv)
                 }
                 SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
                 SDL_QueryTexture(pictures[current_picture].texture, &pixelFormat, &access, &w, &h);
-                SDL_SetWindowSize(window, w, h);
+                SDL_SetWindowSize(window, (int)SDL_ceilf(w / mode->display_scale), (int)SDL_ceilf(h / mode->display_scale));
                 SDL_SetWindowShape(window, pictures[current_picture].surface, &pictures[current_picture].mode);
             }
             if (event.type == SDL_EVENT_QUIT) {