sdl_gemvideo.c

linux下面的一个开源的多媒体中间件

				source, destination,
				x2-x1, rects[i].h,
				SDL_FALSE,
				surface->pitch, destpitch
			);
		}
	}

	if (GEM_bufops & (B2S_VROCPYFM_1TOS|B2S_VROCPYFM_2TOS)) {
		MFDB mfdb_src;
		short blitcoords[8];

		mfdb_src.fd_addr=surface->pixels;
		mfdb_src.fd_w=surf_width;
		mfdb_src.fd_h=surface->h;
		mfdb_src.fd_wdwidth= (surface->pitch/VDI_pixelsize) >> 4;
		mfdb_src.fd_nplanes=surface->format->BitsPerPixel;
		mfdb_src.fd_stand=
			mfdb_src.fd_r1=
			mfdb_src.fd_r2=
			mfdb_src.fd_r3= 0;
		if (GEM_bufops & B2S_VROCPYFM_2TOS) {
			mfdb_src.fd_addr=GEM_buffer2;
		}

		for ( i=0; i<numrects; ++i ) {
			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);
		}
	}
}

static void GEM_UpdateRectsWindowed(_THIS, int numrects, SDL_Rect *rects)
{
	short pxy[4], wind_pxy[4];
	int i;

	if (wind_get(GEM_handle, WF_WORKXYWH, &wind_pxy[0], &wind_pxy[1], &wind_pxy[2], &wind_pxy[3])==0) {
		return;
	}

	for ( i=0; i<numrects; ++i ) {
		pxy[0] = wind_pxy[0] + rects[i].x;
		pxy[1] = wind_pxy[1] + rects[i].y;
		pxy[2] = rects[i].w;
		pxy[3] = rects[i].h;

		GEM_wind_redraw(this, GEM_handle, pxy);
	}
}

static void GEM_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
{
	SDL_Surface *surface;

	if (GEM_lock_redraw) {
		return;
	}

	surface = this->screen;

	if (surface->flags & SDL_FULLSCREEN) {
		GEM_UpdateRectsFullscreen(this, numrects, rects);
	} else {
		GEM_UpdateRectsWindowed(this, numrects, rects);
	}
}

static int GEM_FlipHWSurfaceFullscreen(_THIS, SDL_Surface *surface)
{
	int surf_width;

	/* Need to be a multiple of 16 pixels */
	surf_width=surface->w;
	if ((surf_width & 15) != 0) {
		surf_width = (surf_width | 15) + 1;
	}

	if (GEM_bufops & (B2S_C2P_1TO2|B2S_C2P_1TOS)) {
		void *destscr;
		int destpitch;

		if (GEM_bufops & B2S_C2P_1TOS) {
			destscr = VDI_screen;
			destpitch = VDI_pitch;
		} else {
			destscr = GEM_buffer2;
			destpitch = surface->pitch;
		}

		SDL_Atari_C2pConvert(
			surface->pixels, destscr,
			surf_width, surface->h,
			SDL_FALSE,
			surface->pitch, destpitch
		);
	}

	if (GEM_bufops & (B2S_VROCPYFM_1TOS|B2S_VROCPYFM_2TOS)) {
		MFDB mfdb_src;
		short blitcoords[8];

		mfdb_src.fd_w=surf_width;
		mfdb_src.fd_h=surface->h;
		mfdb_src.fd_wdwidth=mfdb_src.fd_w >> 4;
		mfdb_src.fd_nplanes=surface->format->BitsPerPixel;
		mfdb_src.fd_stand=
			mfdb_src.fd_r1=
			mfdb_src.fd_r2=
			mfdb_src.fd_r3= 0;
		if (GEM_bufops & B2S_VROCPYFM_1TOS) {
			mfdb_src.fd_addr=surface->pixels;
		} else {
			mfdb_src.fd_addr=GEM_buffer2;
		}

		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);
	}

	return(0);
}

static int GEM_FlipHWSurfaceWindowed(_THIS, SDL_Surface *surface)
{
	short	pxy[8];

	/* Update the whole window */
	wind_get(GEM_handle, WF_WORKXYWH, &pxy[0], &pxy[1], &pxy[2], &pxy[3]);

	GEM_wind_redraw(this, GEM_handle, pxy);

	return(0);
}

static int GEM_FlipHWSurface(_THIS, SDL_Surface *surface)
{
	if (GEM_lock_redraw) {
		return(0);
	}

	if (surface->flags & SDL_FULLSCREEN) {
		return GEM_FlipHWSurfaceFullscreen(this, surface);
	} else {
		return GEM_FlipHWSurfaceWindowed(this, surface);
	}
}

static int GEM_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
	int i;
	SDL_Surface *surface;

#ifdef DEBUG_VIDEO_GEM
	printf("sdl:video:gem: setcolors()\n");
#endif

	/* Do not change palette in True Colour */
	surface = this->screen;
	if (surface->format->BitsPerPixel > 8) {
		return 1;
	}

	for(i = 0; i < ncolors; i++)
	{
		int		r, g, b;
		short	rgb[3];

		r = colors[i].r;
		g = colors[i].g;
		b = colors[i].b;

		rgb[0] = VDI_curpalette[i][0] = (1000 * r) / 255;
		rgb[1] = VDI_curpalette[i][1] =(1000 * g) / 255;
		rgb[2] = VDI_curpalette[i][2] =(1000 * b) / 255;

		vs_color(VDI_handle, vdi_index[firstcolor+i], rgb);
	}

	return(1);
}

#if 0
static int GEM_ToggleFullScreen(_THIS, int on)
{
	if (on) {
		GEM_LockScreen(this);
	} else {
		GEM_UnlockScreen(this);
	}

	return(1);
}
#endif

/* Note:  If we are terminated, this could be called in the middle of
   another SDL video routine -- notably UpdateRects.
*/
void GEM_VideoQuit(_THIS)
{
	SDL_AtariXbios_RestoreVectors();
	if (GEM_usedevmouse) {
		SDL_AtariDevMouse_Close();
	}

	GEM_FreeBuffers(this);

#if SDL_VIDEO_OPENGL
	if (gl_active) {
		SDL_AtariGL_Quit(this, SDL_TRUE);
	}
#endif

	/* Destroy window */
	if (GEM_handle>=0) {
		wind_close(GEM_handle);
		wind_delete(GEM_handle);
		GEM_handle=-1;
	}

	GEM_UnlockScreen(this);
	if (GEM_menubar) {
		Mfree(GEM_menubar);
		GEM_menubar=NULL;
	}

	appl_exit();

	GEM_SetNewPalette(this, VDI_oldpalette);

	/* Close VDI workstation */
	if (VDI_handle) {
		v_clsvwk(VDI_handle);
	}

	/* Free mode list */
	if (SDL_modelist[0]) {
		SDL_free(SDL_modelist[0]);
		SDL_modelist[0]=NULL;
	}

	this->screen->pixels = NULL;	
}

void GEM_wind_redraw(_THIS, int winhandle, short *inside)
{
	short todo[4];

	/* Tell AES we are going to update */
	wind_update(BEG_UPDATE);

	v_hide_c(VDI_handle);

	/* Browse the rectangle list to redraw */
	if (wind_get(winhandle, WF_FIRSTXYWH, &todo[0], &todo[1], &todo[2], &todo[3])!=0) {

		while (todo[2] && todo[3]) {

			if (rc_intersect((GRECT *)inside,(GRECT *)todo)) {
				todo[2] += todo[0]-1;
				todo[3] += todo[1]-1;
				refresh_window(this, winhandle, todo);
			}

			if (wind_get(winhandle, WF_NEXTXYWH, &todo[0], &todo[1], &todo[2], &todo[3])==0) {
				break;
			}
		}

	}

	/* Update finished */
	wind_update(END_UPDATE);

	v_show_c(VDI_handle,1);
}

static void refresh_window(_THIS, int winhandle, short *rect)
{
	MFDB mfdb_src;
	short pxy[8],wind_pxy[8];
	SDL_Surface *surface;
	int iconified;

	/* Is window iconified ? */
	iconified = 0;
/*	if (GEM_wfeatures & (1<<WF_ICONIFY))*/ {
		if (wind_get(winhandle, WF_ICONIFY, &wind_pxy[0], &wind_pxy[1], &wind_pxy[2], &wind_pxy[3])!=0) {
			iconified = wind_pxy[0];
		}
	}

	if (wind_get(winhandle, WF_WORKXYWH, &wind_pxy[0], &wind_pxy[1], &wind_pxy[2], &wind_pxy[3])==0) {
		return;
	}

	if (iconified && GEM_icon) {
		short icon_rect[4], dst_rect[4];
		short iconx,icony;
		
		surface = GEM_icon;

		GEM_ClearRect(this, rect);

		/* Calculate centered icon(x,y,w,h) relative to window */
		iconx = (wind_pxy[2]-surface->w)>>1;
		icony = (wind_pxy[3]-surface->h)>>1;

		icon_rect[0] = iconx;
		icon_rect[1] = icony;
		icon_rect[2] = surface->w;
		icon_rect[3] = surface->h;

		/* Calculate redraw rectangle(x,y,w,h) relative to window */
		dst_rect[0] = rect[0]-wind_pxy[0];
		dst_rect[1] = rect[1]-wind_pxy[1];
		dst_rect[2] = rect[2]-rect[0]+1;
		dst_rect[3] = rect[3]-rect[1]+1;

		/* Does the icon rectangle must be redrawn ? */
		if (!rc_intersect((GRECT *)icon_rect, (GRECT *)dst_rect)) {
			return;
		}

#if DEBUG_VIDEO_GEM
		printf("sdl:video:gem:  clip(0,0,%d,%d) to (%d,%d,%d,%d)\n",
			surface->w-1,surface->h-1, dst_rect[0],dst_rect[1],dst_rect[2],dst_rect[3]);
		printf("sdl:video:gem:  icon(%d,%d,%d,%d)\n",
			icon_rect[0], icon_rect[1], icon_rect[2], icon_rect[3]);
		printf("sdl:video:gem: refresh_window(): draw icon\n");
#endif

		/* Calculate icon(x1,y1,x2,y2) relative to screen */
		icon_rect[0] += wind_pxy[0];
		icon_rect[1] += wind_pxy[1];
		icon_rect[2] += icon_rect[0]-1;
		icon_rect[3] += icon_rect[1]-1;

		/* Calculate intersection rectangle to redraw */
		pxy[4]=pxy[0]=MAX(icon_rect[0],rect[0]);
		pxy[5]=pxy[1]=MAX(icon_rect[1],rect[1]);
 		pxy[6]=pxy[2]=MIN(icon_rect[2],rect[2]);
	 	pxy[7]=pxy[3]=MIN(icon_rect[3],rect[3]);

		/* Calculate icon source image pos relative to window */
		pxy[0] -= wind_pxy[0]+iconx;
		pxy[1] -= wind_pxy[1]+icony;
		pxy[2] -= wind_pxy[0]+iconx;
		pxy[3] -= wind_pxy[1]+icony;

	} else {
		surface = this->screen;

#if DEBUG_VIDEO_GEM
		printf("sdl:video:gem: refresh_window(): draw frame buffer\n");
#endif

		/* Redraw all window content */
		pxy[0] = rect[0]-wind_pxy[0];
		pxy[1] = rect[1]-wind_pxy[1];
	 	pxy[2] = rect[2]-wind_pxy[0];   
	 	pxy[3] = rect[3]-wind_pxy[1];  

		pxy[4] = rect[0];
		pxy[5] = rect[1];
		pxy[6] = rect[2];  
		pxy[7] = rect[3];
	}

	if (GEM_bufops & B2S_C2P_1TO2) {
		void *src, *dest;
		int x1,x2;

		x1 = (rect[0]-wind_pxy[0]) & ~15;
		x2 = rect[2]-wind_pxy[0];
		if (x2 & 15) {
			x2 = (x2 | 15) +1;
		}

		src = surface->pixels;
		src += surface->pitch * (rect[1]-wind_pxy[1]);
		src += x1;

		dest = GEM_buffer2;
		dest += surface->pitch * (rect[1]-wind_pxy[1]);
		dest += x1;

		SDL_Atari_C2pConvert(
			src, dest,
			x2-x1, rect[3]-rect[1]+1,
			SDL_FALSE,
			surface->pitch, surface->pitch
		);
	}

	mfdb_src.fd_addr=surface->pixels;
	{
		int width;

		/* Need to be a multiple of 16 pixels */
		width=surface->w;
		if ((width & 15) != 0) {
			width = (width | 15) + 1;
		}
		mfdb_src.fd_w=width;
	}
	mfdb_src.fd_h=surface->h;
  	mfdb_src.fd_nplanes=surface->format->BitsPerPixel;
	mfdb_src.fd_wdwidth=mfdb_src.fd_w>>4;
	mfdb_src.fd_stand=
		mfdb_src.fd_r1=
  		mfdb_src.fd_r2=
	  	mfdb_src.fd_r3= 0;

	if (GEM_bufops & B2S_VROCPYFM_2TOS) {
		mfdb_src.fd_addr=GEM_buffer2;
	}

#if DEBUG_VIDEO_GEM
	printf("sdl:video:gem: redraw %dx%d: (%d,%d,%d,%d) to (%d,%d,%d,%d)\n",
		surface->w, surface->h,
		pxy[0],pxy[1],pxy[2],pxy[3],
		pxy[4],pxy[5],pxy[6],pxy[7]
	);
#endif

	vro_cpyfm( VDI_handle, S_ONLY, pxy, &mfdb_src, &VDI_dst_mfdb);
}

#if SDL_VIDEO_OPENGL

static void GEM_GL_SwapBuffers(_THIS)
{
	SDL_AtariGL_SwapBuffers(this);
	GEM_FlipHWSurface(this, this->screen);
}

#endif