Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
This is helpful to validate the automated test suite, since this renderer is super simple and should always pass tests.
--- a/src/video/dummy/SDL_nullrender.c Wed Nov 18 09:17:29 2009 +0000
+++ b/src/video/dummy/SDL_nullrender.c Wed Nov 18 09:20:01 2009 +0000
@@ -40,6 +40,14 @@
SDL_Texture * texture,
const SDL_Rect * srcrect,
const SDL_Rect * dstrect);
+static int SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer,
+ const SDL_Rect * rect,
+ Uint32 format,
+ void * pixels, int pitch);
+static int SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer,
+ const SDL_Rect * rect,
+ Uint32 format,
+ const void * pixels, int pitch);
static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
@@ -95,6 +103,8 @@
renderer->RenderLine = SDL_DUMMY_RenderLine;
renderer->RenderFill = SDL_DUMMY_RenderFill;
renderer->RenderCopy = SDL_DUMMY_RenderCopy;
+ renderer->RenderReadPixels = SDL_DUMMY_RenderReadPixels;
+ renderer->RenderWritePixels = SDL_DUMMY_RenderWritePixels;
renderer->RenderPresent = SDL_DUMMY_RenderPresent;
renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
renderer->info.name = SDL_DUMMY_RenderDriver.info.name;
@@ -225,6 +235,46 @@
}
}
+static int
+SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
+ Uint32 format, void * pixels, int pitch)
+{
+ SDL_DUMMY_RenderData *data =
+ (SDL_DUMMY_RenderData *) renderer->driverdata;
+ SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+ SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+ SDL_Surface *screen = data->screens[data->current_screen];
+ Uint32 screen_format = display->current_mode.format;
+ Uint8 *screen_pixels = (Uint8 *) screen->pixels +
+ rect->y * screen->pitch +
+ rect->x * screen->format->BytesPerPixel;
+ int screen_pitch = screen->pitch;
+
+ return SDL_ConvertPixels(rect->w, rect->h,
+ screen_format, screen_pixels, screen_pitch,
+ format, pixels, pitch);
+}
+
+static int
+SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
+ Uint32 format, const void * pixels, int pitch)
+{
+ SDL_DUMMY_RenderData *data =
+ (SDL_DUMMY_RenderData *) renderer->driverdata;
+ SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+ SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+ SDL_Surface *screen = data->screens[data->current_screen];
+ Uint32 screen_format = display->current_mode.format;
+ Uint8 *screen_pixels = (Uint8 *) screen->pixels +
+ rect->y * screen->pitch +
+ rect->x * screen->format->BytesPerPixel;
+ int screen_pitch = screen->pitch;
+
+ return SDL_ConvertPixels(rect->w, rect->h,
+ format, pixels, pitch,
+ screen_format, screen_pixels, screen_pitch);
+}
+
static void
SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
{