SDL will center surface on screen for us

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401072

src/video/gem/SDL_gemvideo.c

@@ -777,8 +777,6 @@ SDL_Surface *GEM_SetVideoMode(_THIS, SDL_Surface *current,
 		current->pitch = width * VDI_pixelsize;
 	} else {
 		current->pixels = VDI_screen;
-		current->pixels += VDI_pitch * ((VDI_h - height) >> 1);
-		current->pixels += VDI_pixelsize * ((VDI_w - width) >> 1);
 		current->pitch = VDI_pitch;
 	}
 
@@ -844,13 +842,7 @@ static void GEM_UpdateRectsFullscreen(_THIS, int numrects, SDL_Rect *rects)
 		int destpitch;
 
 		if (GEM_bufops & B2S_C2P_1TOS) {
-			int destx;
-
 			destscr = VDI_screen;
-			destscr += VDI_pitch * ((VDI_h - surface->h) >> 1);
-			destx = (VDI_w - surf_width) >> 1;
-			destx &= ~15;
-			destscr += destx;
 			destpitch = VDI_pitch;
 		} else {
 			destscr = GEM_buffer2;
@@ -902,15 +894,10 @@ static void GEM_UpdateRectsFullscreen(_THIS, int numrects, SDL_Rect *rects)
 		}
 
 		for ( i=0; i<numrects; ++i ) {
-			blitcoords[0] = rects[i].x;
-			blitcoords[1] = rects[i].y;
-			blitcoords[2] = blitcoords[0] + rects[i].w - 1;
-			blitcoords[3] = blitcoords[1] + rects[i].h - 1;
-
-			blitcoords[4] = rects[i].x + ((VDI_w - surface->w) >> 1);
-			blitcoords[5] = rects[i].y + ((VDI_h - surface->h) >> 1);
-			blitcoords[6] = blitcoords[4] + rects[i].w - 1;
-			blitcoords[7] = blitcoords[5] + rects[i].h - 1;
+			blitcoords[0] = blitcoords[4] = rects[i].x;
+			blitcoords[1] = blitcoords[5] = rects[i].y;
+			blitcoords[2] = blitcoords[6] = rects[i].x + rects[i].w - 1;
+			blitcoords[3] = blitcoords[7] = rects[i].y + rects[i].h - 1;
 
 			vro_cpyfm(VDI_handle, S_ONLY, blitcoords, &mfdb_src, &VDI_dst_mfdb);
 		}
@@ -968,13 +955,7 @@ static int GEM_FlipHWSurfaceFullscreen(_THIS, SDL_Surface *surface)
 		int destpitch;
 
 		if (GEM_bufops & B2S_C2P_1TOS) {
-			int destx;
-
 			destscr = VDI_screen;
-			destscr += VDI_pitch * ((VDI_h - surface->h) >> 1);
-			destx = (VDI_w - surf_width) >> 1;
-			destx &= ~15;
-			destscr += destx;
 			destpitch = VDI_pitch;
 		} else {
 			destscr = GEM_buffer2;
@@ -1007,15 +988,10 @@ static int GEM_FlipHWSurfaceFullscreen(_THIS, SDL_Surface *surface)
 			mfdb_src.fd_addr=GEM_buffer2;
 		}
 
-		blitcoords[0] = 0;
-		blitcoords[1] = 0;
-		blitcoords[2] = surface->w - 1;
-		blitcoords[3] = surface->h - 1;
-
-		blitcoords[4] = (VDI_w - surface->w) >> 1;
-		blitcoords[5] = (VDI_h - surface->h) >> 1;
-		blitcoords[6] = blitcoords[4] + surface->w - 1;
-		blitcoords[7] = blitcoords[5] + surface->h - 1;
+		blitcoords[0] = blitcoords[4] = 0;
+		blitcoords[1] = blitcoords[5] = 0;
+		blitcoords[2] = blitcoords[6] = surface->w - 1;
+		blitcoords[3] = blitcoords[7] = surface->h - 1;
 
 		vro_cpyfm(VDI_handle, S_ONLY, blitcoords, &mfdb_src, &VDI_dst_mfdb);
 	}

src/video/xbios/SDL_xbios.c

@@ -727,17 +727,8 @@ static void XBIOS_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
 	surface = this->screen;
 
 	if ((surface->format->BitsPerPixel) == 8) {
-		void *destscr;
-		int destx;
 		int i;
 
-		/* Center on destination screen */
-		destscr = XBIOS_screens[XBIOS_fbnum];
-		destscr += XBIOS_pitch * ((XBIOS_height - surface->h) >> 1);
-		destx = (XBIOS_width - surface->w) >> 1;
-		destx &= ~15;
-		destscr += destx;
-
 		for (i=0;i<numrects;i++) {
 			void *source,*destination;
 			int x1,x2;
@@ -752,19 +743,16 @@ static void XBIOS_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
 			source += surface->pitch * rects[i].y;
 			source += x1;
 
-			destination = destscr;
+			destination = XBIOS_screens[XBIOS_fbnum];
 			destination += XBIOS_pitch * rects[i].y;
 			destination += x1;
 
 			/* Convert chunky to planar screen */
 			SDL_Atari_C2pConvert(
-				source,
-				destination,
-				x2-x1,
-				rects[i].h,
+				source, destination,
+				x2-x1, rects[i].h,
 				XBIOS_doubleline,
-				surface->pitch,
-				XBIOS_pitch
+				surface->pitch, XBIOS_pitch
 			);
 		}
 	}
@@ -785,25 +773,12 @@ static void XBIOS_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
 static int XBIOS_FlipHWSurface(_THIS, SDL_Surface *surface)
 {
 	if ((surface->format->BitsPerPixel) == 8) {
-		void *destscr;
-		int destx;
-			
-		/* Center on destination screen */
-		destscr = XBIOS_screens[XBIOS_fbnum];
-		destscr += XBIOS_pitch * ((XBIOS_height - surface->h) >> 1);
-		destx = (XBIOS_width - surface->w) >> 1;
-		destx &= ~15;
-		destscr += destx;
-
 		/* Convert chunky to planar screen */
 		SDL_Atari_C2pConvert(
-			surface->pixels,
-			destscr,
-			surface->w,
-			surface->h,
+			surface->pixels, XBIOS_screens[XBIOS_fbnum],
+			surface->w, surface->h,
 			XBIOS_doubleline,
-			surface->pitch,
-			XBIOS_pitch
+			surface->pitch, XBIOS_pitch
 		);
 	}