video/wiiu: Add support for DRC/TV only windows (#1)

src/render/wiiu/SDL_rpresent_wiiu.c

@@ -101,19 +101,22 @@ static void render_scene(SDL_Renderer * renderer) {
 void WIIU_SDL_RenderPresent(SDL_Renderer * renderer)
 {
     WIIU_RenderData *data = (WIIU_RenderData *) renderer->driverdata;
-    //SDL_Window *window = renderer->window;
-
-    //GX2Flush();
+    Uint32 flags = SDL_GetWindowFlags(renderer->window);
 
     WHBGfxBeginRender();
 
-    WHBGfxBeginRenderTV();
-    render_scene(renderer);
-    WHBGfxFinishRenderTV();
+/*  Only render to TV if the window is *not* drc-only */
+    if (!(flags & SDL_WINDOW_WIIU_GAMEPAD_ONLY)) {
+        WHBGfxBeginRenderTV();
+        render_scene(renderer);
+        WHBGfxFinishRenderTV();
+    }
 
-    WHBGfxBeginRenderDRC();
-    render_scene(renderer);
-    WHBGfxFinishRenderDRC();
+    if (!(flags & SDL_WINDOW_WIIU_TV_ONLY)) {
+        WHBGfxBeginRenderDRC();
+        render_scene(renderer);
+        WHBGfxFinishRenderDRC();
+    }
 
     WHBGfxFinishRender();
 

src/video/wiiu/SDL_wiiuvideo.c

@@ -88,10 +88,76 @@ static void WIIU_VideoQuit(_THIS)
 }
 
 static int WIIU_CreateSDLWindow(_THIS, SDL_Window *window) {
+	WIIU_VideoDeviceData* ddata = (WIIU_VideoDeviceData*) _this->driverdata;
+
+	/* If this window wants to be mirrored (no _ONLY flags) */
+	if (!(window->flags &
+		(SDL_WINDOW_WIIU_TV_ONLY | SDL_WINDOW_WIIU_GAMEPAD_ONLY))) {
+		/* Only one window can exist in this state */
+		if (ddata->drc_window_exists ||
+			ddata->tv_window_exists ||
+			ddata->mirrored_window_exists) {
+			return SDL_SetError(
+				"WiiU only supports one window when mirroring the TV and "
+				"Gamepad. https://github.com/yawut/SDL/wiki/Custom-Window-Flags"
+			);
+		}
+
+		/* Okay! */
+		ddata->mirrored_window_exists = SDL_TRUE;
+
+	/* If this window wants the TV */
+	} else if (window->flags & SDL_WINDOW_WIIU_TV_ONLY) {
+		/* Check if a TV window already exists */
+		if (ddata->tv_window_exists) {
+			return SDL_SetError(
+				"WiiU only supports one window on the TV. "
+				"https://github.com/yawut/SDL/wiki/Custom-Window-Flags"
+			);
+		/* Check if a mirrored window exists */
+		} else if (ddata->mirrored_window_exists) {
+			return SDL_SetError(
+				"WiiU only supports one window when mirroring the TV and "
+				"Gamepad. https://github.com/yawut/SDL/wiki/Custom-Window-Flags"
+			);
+		}
+
+		ddata->tv_window_exists = SDL_TRUE;
+
+	/* If this window wants the Gamepad */
+	} else if (window->flags & SDL_WINDOW_WIIU_GAMEPAD_ONLY) {
+		/* Check if a TV window already exists */
+		if (ddata->drc_window_exists) {
+			return SDL_SetError(
+				"WiiU only supports one window on the Gamepad. "
+				"https://github.com/yawut/SDL/wiki/Custom-Window-Flags"
+			);
+		/* Check if a mirrored window exists */
+		} else if (ddata->mirrored_window_exists) {
+			return SDL_SetError(
+				"WiiU only supports one window when mirroring the TV and "
+				"Gamepad. https://github.com/yawut/SDL/wiki/Custom-Window-Flags"
+			);
+		}
+
+		ddata->drc_window_exists = SDL_TRUE;
+	}
 	SDL_SetKeyboardFocus(window);
 	return 0;
 }
 
+static void WIIU_DestroyWindow(_THIS, SDL_Window * window) {
+	WIIU_VideoDeviceData* ddata = (WIIU_VideoDeviceData*) _this->driverdata;
+
+	if (window->flags & SDL_WINDOW_WIIU_TV_ONLY) {
+		ddata->tv_window_exists = SDL_FALSE;
+	} else if (window->flags & SDL_WINDOW_WIIU_GAMEPAD_ONLY) {
+		ddata->drc_window_exists = SDL_FALSE;
+	} else {
+		ddata->mirrored_window_exists = SDL_FALSE;
+	}
+}
+
 static int WIIU_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode)
 {
 	return 0;
@@ -108,6 +174,7 @@ static int WIIU_Available(void)
 
 static void WIIU_DeleteDevice(SDL_VideoDevice *device)
 {
+	SDL_free(device->driverdata);
 	SDL_free(device);
 }
 
@@ -121,11 +188,19 @@ static SDL_VideoDevice *WIIU_CreateDevice(int devindex)
 		return NULL;
 	}
 
+	device->driverdata = (void*) SDL_calloc(1, sizeof(WIIU_VideoDeviceData));
+	if (!device->driverdata) {
+		SDL_OutOfMemory();
+		SDL_free(device);
+		return NULL;
+	}
+
 	device->VideoInit = WIIU_VideoInit;
 	device->VideoQuit = WIIU_VideoQuit;
 	device->SetDisplayMode = WIIU_SetDisplayMode;
 	device->PumpEvents = WIIU_PumpEvents;
 	device->CreateSDLWindow = WIIU_CreateSDLWindow;
+	device->DestroyWindow = WIIU_DestroyWindow;
 
 	device->free = WIIU_DeleteDevice;
 

src/video/wiiu/SDL_wiiuvideo.h

@@ -35,4 +35,11 @@ typedef struct
     GX2Texture texture;
 } WIIU_WindowData;
 
+typedef struct
+{
+    SDL_bool tv_window_exists;
+    SDL_bool drc_window_exists;
+    SDL_bool mirrored_window_exists;
+} WIIU_VideoDeviceData;
+
 #endif //SDL_wiiuvideo_h