示例#1
0
/* 
 * This function performs a fast fill of the given rectangle with 'color'
 */
int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
{
	SDL_VideoDevice *video = current_video;
	SDL_VideoDevice *this  = current_video;
	int x, y;
	Uint8 *row;

	/* If 'dstrect' == NULL, then fill the whole surface */
	if ( dstrect ) {
		/* Perform clipping */
		if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) {
			return(0);
		}
	} else {
		dstrect = &dst->clip_rect;
	}

	/* Check for hardware acceleration */
	if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) &&
					video->info.blit_fill ) {
		return(video->FillHWRect(this, dst, dstrect, color));
	}

	/* Perform software fill */
	if ( SDL_LockSurface(dst) != 0 ) {
		return(-1);
	}
	row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+
			dstrect->x*dst->format->BytesPerPixel;
	if ( dst->format->palette || (color == 0) ) {
		x = dstrect->w*dst->format->BytesPerPixel;
		if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) {
			int n = x >> 2;
			for ( y=dstrect->h; y; --y ) {
				SDL_memset4(row, 0, n);
				row += dst->pitch;
			}
		} else {
示例#2
0
/* 
 * This function performs a fast fill of the given rectangle with 'color'
 */
int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
{
	SDL_VideoDevice *video = current_video;
	SDL_VideoDevice *this  = current_video;
	int x, y;
	Uint8 *row;

	/* This function doesn't work on surfaces < 8 bpp */
	if ( dst->format->BitsPerPixel < 8 ) {
		switch(dst->format->BitsPerPixel) {
		    case 1:
			return SDL_FillRect1(dst, dstrect, color);
			break;
		    case 4:
			return SDL_FillRect4(dst, dstrect, color);
			break;
		    default:
			SDL_SetError("Fill rect on unsupported surface format");
			return(-1);
			break;
		}
	}

	/* If 'dstrect' == NULL, then fill the whole surface */
	if ( dstrect ) {
		/* Perform clipping */
		if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) {
			return(0);
		}
	} else {
		dstrect = &dst->clip_rect;
	}

	/* Check for hardware acceleration */
	if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) &&
					video->info.blit_fill ) {
		SDL_Rect hw_rect;
		if ( dst == SDL_VideoSurface ) {
			hw_rect = *dstrect;
			hw_rect.x += current_video->offset_x;
			hw_rect.y += current_video->offset_y;
			dstrect = &hw_rect;
		}
		return(video->FillHWRect(this, dst, dstrect, color));
	}

	/* Perform software fill */
	if ( SDL_LockSurface(dst) != 0 ) {
		return(-1);
	}
	row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+
			dstrect->x*dst->format->BytesPerPixel;
	if ( dst->format->palette || (color == 0) ) {
		x = dstrect->w*dst->format->BytesPerPixel;
		if ( !color && !((int)row&3) && !(x&3) && !(dst->pitch&3) ) {
			int n = x >> 2;
			for ( y=dstrect->h; y; --y ) {
				SDL_memset4(row, 0, n);
				row += dst->pitch;
			}
		} else {