Reuse texture

src/sdl_draw.c

@@ -64,11 +64,10 @@ static void sdl_pal_check(void) {
 void sdl_updateScreen(void) {
 	if (!sdl_dirty)
 		return;
-	SDL_Texture *texture = SDL_CreateTextureFromSurface(sdl_renderer, sdl_display);
+	SDL_UpdateTexture(sdl_texture, NULL, sdl_display->pixels, sdl_display->pitch);
 	SDL_RenderClear(sdl_renderer);
-	SDL_RenderCopy(sdl_renderer, texture, NULL, NULL);
+	SDL_RenderCopy(sdl_renderer, sdl_texture, NULL, NULL);
 	SDL_RenderPresent(sdl_renderer);
-	SDL_DestroyTexture(texture);
 	sdl_dirty = false;
 }
 

src/sdl_mode.c

@@ -57,7 +57,11 @@ void sdl_setWindowSize(int x, int y, int w, int h) {
 	view_h = h;
 	
 	SDL_SetWindowSize(sdl_window, w, h);
+	SDL_FreeSurface(sdl_display);
+	SDL_DestroyTexture(sdl_texture);
 	sdl_display = SDL_CreateRGBSurface(0, w, h, 32, 0, 0, 0, 0);
+	sdl_texture = SDL_CreateTexture(sdl_renderer, sdl_display->format->format,
+									SDL_TEXTUREACCESS_STATIC, w, h);
 
 	//ms_active = (SDL_GetAppState() & SDL_APPMOUSEFOCUS) ? TRUE : FALSE;
 }

src/sdl_private.h

@@ -34,6 +34,7 @@
 struct sdl_private_data {
 	SDL_Window *window;
 	SDL_Renderer *renderer;
+	SDL_Texture *texture;
 	SDL_Surface     *dsp; /* toplevel surface */
 
 	SDL_Surface     *dib; /* offscreen surface */
@@ -70,6 +71,7 @@ extern struct sdl_private_data *sdl_videodev;
 
 #define sdl_window (sdl_videodev->window)
 #define sdl_renderer (sdl_videodev->renderer)
+#define sdl_texture (sdl_videodev->texture)
 #define sdl_display (sdl_videodev->dsp)
 #define sdl_dib (sdl_videodev->dib)
 #define sdl_col (sdl_videodev->col)

src/sdl_video.c

@@ -106,6 +106,9 @@ static void window_init(void) {
 	sdl_renderer = SDL_CreateRenderer(sdl_window, -1, 0);
 	sdl_display = SDL_CreateRGBSurface(0, SYS35_DEFAULT_WIDTH, SYS35_DEFAULT_HEIGHT,
 									   32, 0, 0, 0, 0);
+	sdl_texture = SDL_CreateTexture(sdl_renderer, sdl_display->format->format,
+									SDL_TEXTUREACCESS_STATIC,
+									SYS35_DEFAULT_WIDTH, SYS35_DEFAULT_HEIGHT);
 }
 
 static void makeDIB(int width, int height, int depth) {