예제 #1
0
static void blit_to_primary(win_window_info *window, int srcwidth, int srcheight)
{
	dd_info *dd = window->drawdata;
	IDirectDrawSurface7 *target = (dd->back != NULL) ? dd->back : dd->primary;
	win_monitor_info *monitor = winwindow_video_window_monitor(window, NULL);
	DDBLTFX blitfx = { sizeof(DDBLTFX) };
	RECT clear, outer, dest, source;
	INT32 dstwidth, dstheight;
	HRESULT result;

	// compute source rect
	source.left = source.top = 0;
	source.right = srcwidth;
	source.bottom = srcheight;

	// compute outer rect -- windowed version
	if (!window->fullscreen)
	{
		GetClientRect(window->hwnd, &outer);
		ClientToScreen(window->hwnd, &((LPPOINT)&outer)[0]);
		ClientToScreen(window->hwnd, &((LPPOINT)&outer)[1]);

		// adjust to be relative to the monitor
		outer.left -= monitor->info.rcMonitor.left;
		outer.right -= monitor->info.rcMonitor.left;
		outer.top -= monitor->info.rcMonitor.top;
		outer.bottom -= monitor->info.rcMonitor.top;
	}

	// compute outer rect -- full screen version
	else
	{
		calc_fullscreen_margins(window, dd->primarydesc.dwWidth, dd->primarydesc.dwHeight, &outer);
	}

	// if we're respecting the aspect ratio, we need to adjust to fit
	dstwidth = rect_width(&outer);
	dstheight = rect_height(&outer);
	if (!video_config.hwstretch)
	{
		// trim the source if necessary
		if (rect_width(&outer) < srcwidth)
		{
			source.left += (srcwidth - rect_width(&outer)) / 2;
			source.right = source.left + rect_width(&outer);
		}
		if (rect_height(&outer) < srcheight)
		{
			source.top += (srcheight - rect_height(&outer)) / 2;
			source.bottom = source.top + rect_height(&outer);
		}

		// match the destination and source sizes
		dstwidth = srcwidth = source.right - source.left;
		dstheight = srcheight = source.bottom - source.top;
	}
	else if (video_config.keepaspect)
	{
		// compute the appropriate visible area
		render_target_compute_visible_area(window->target, rect_width(&outer), rect_height(&outer), winvideo_monitor_get_aspect(monitor), render_target_get_orientation(window->target), &dstwidth, &dstheight);
	}

	// center within
	dest.left = outer.left + (rect_width(&outer) - dstwidth) / 2;
	dest.right = dest.left + dstwidth;
	dest.top = outer.top + (rect_height(&outer) - dstheight) / 2;
	dest.bottom = dest.top + dstheight;

	// compare against last destination; if different, force a redraw
	if (dest.left != dd->lastdest.left || dest.right != dd->lastdest.right || dest.top != dd->lastdest.top || dest.bottom != dd->lastdest.bottom)
	{
		dd->lastdest = dest;
		update_outer_rects(dd);
	}

	// clear outer rects if we need to
	if (dd->clearouter != 0)
	{
		dd->clearouter--;

		// clear the left edge
		if (dest.left > outer.left)
		{
			clear = outer;
			clear.right = dest.left;
			result = IDirectDrawSurface_Blt(target, &clear, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &blitfx);
			if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X clearing the screen\n", (int)result);
		}

		// clear the right edge
		if (dest.right < outer.right)
		{
			clear = outer;
			clear.left = dest.right;
			result = IDirectDrawSurface_Blt(target, &clear, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &blitfx);
			if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X clearing the screen\n", (int)result);
		}

		// clear the top edge
		if (dest.top > outer.top)
		{
			clear = outer;
			clear.bottom = dest.top;
			result = IDirectDrawSurface_Blt(target, &clear, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &blitfx);
			if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X clearing the screen\n", (int)result);
		}

		// clear the bottom edge
		if (dest.bottom < outer.bottom)
		{
			clear = outer;
			clear.top = dest.bottom;
			result = IDirectDrawSurface_Blt(target, &clear, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &blitfx);
			if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X clearing the screen\n", (int)result);
		}
	}

	// do the blit
	result = IDirectDrawSurface7_Blt(target, &dest, dd->blit, &source, DDBLT_WAIT, NULL);
	if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X blitting to the screen\n", (int)result);

	// page flip if triple buffered
	if (window->fullscreen && dd->back != NULL)
	{
		result = IDirectDrawSurface7_Flip(dd->primary, NULL, DDFLIP_WAIT);
		if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X waiting for VBLANK\n", (int)result);
	}
}
예제 #2
0
static void compute_blit_surface_size(win_window_info *window)
{
	dd_info *dd = window->drawdata;
	INT32 newwidth, newheight;
	int xscale, yscale;
	RECT client;

	// start with the minimum size
	render_target_get_minimum_size(window->target, &newwidth, &newheight);

	// get the window's client rectangle
	GetClientRect(window->hwnd, &client);

	// hardware stretch case: apply prescale
	if (video_config.hwstretch)
	{
		int prescale = (video_config.prescale < 1) ? 1 : video_config.prescale;

		// clamp the prescale to something smaller than the target bounds
		xscale = prescale;
		while (xscale > 1 && newwidth * xscale > rect_width(&client))
			xscale--;
		yscale = prescale;
		while (yscale > 1 && newheight * yscale > rect_height(&client))
			yscale--;
	}

	// non stretch case
	else
	{
		INT32 target_width = rect_width(&client);
		INT32 target_height = rect_height(&client);
		float desired_aspect = 1.0f;

		// compute the appropriate visible area if we're trying to keepaspect
		if (video_config.keepaspect)
		{
			win_monitor_info *monitor = winwindow_video_window_monitor(window, NULL);
			render_target_compute_visible_area(window->target, target_width, target_height, winvideo_monitor_get_aspect(monitor), render_target_get_orientation(window->target), &target_width, &target_height);
			desired_aspect = (float)target_width / (float)target_height;
		}

		// compute maximum integral scaling to fit the window
		xscale = (target_width + 2) / newwidth;
		yscale = (target_height + 2) / newheight;

		// try a little harder to keep the aspect ratio if desired
		if (video_config.keepaspect)
		{
			// if we could stretch more in the X direction, and that makes a better fit, bump the xscale
			while (newwidth * (xscale + 1) <= rect_width(&client) &&
				better_mode(newwidth * xscale, newheight * yscale, newwidth * (xscale + 1), newheight * yscale, desired_aspect))
				xscale++;

			// if we could stretch more in the Y direction, and that makes a better fit, bump the yscale
			while (newheight * (yscale + 1) <= rect_height(&client) &&
				better_mode(newwidth * xscale, newheight * yscale, newwidth * xscale, newheight * (yscale + 1), desired_aspect))
				yscale++;

			// now that we've maxed out, see if backing off the maximally stretched one makes a better fit
			if (rect_width(&client) - newwidth * xscale < rect_height(&client) - newheight * yscale)
			{
				while (xscale > 1 && better_mode(newwidth * xscale, newheight * yscale, newwidth * (xscale - 1), newheight * yscale, desired_aspect))
					xscale--;
			}
			else
			{
				while (yscale > 1 && better_mode(newwidth * xscale, newheight * yscale, newwidth * xscale, newheight * (yscale - 1), desired_aspect))
					yscale--;
			}
		}
	}

	// ensure at least a scale factor of 1
	if (xscale == 0) xscale = 1;
	if (yscale == 0) yscale = 1;

	// apply the final scale
	newwidth *= xscale;
	newheight *= yscale;
	if (newwidth != dd->blitwidth || newheight != dd->blitheight)
	{
		// force some updates
		update_outer_rects(dd);
		mame_printf_verbose("DirectDraw: New blit size = %dx%d\n", newwidth, newheight);
	}
	dd->blitwidth = newwidth;
	dd->blitheight = newheight;
}
예제 #3
0
static int ddraw_create_surfaces(win_window_info *window)
{
	dd_info *dd = window->drawdata;
	HRESULT result;

	// make a description of the primary surface
	memset(&dd->primarydesc, 0, sizeof(dd->primarydesc));
	dd->primarydesc.dwSize = sizeof(dd->primarydesc);
	dd->primarydesc.dwFlags = DDSD_CAPS;
	dd->primarydesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

	// for triple-buffered full screen mode, allocate flipping surfaces
	if (window->fullscreen && video_config.triplebuf)
	{
		dd->primarydesc.dwFlags |= DDSD_BACKBUFFERCOUNT;
		dd->primarydesc.ddsCaps.dwCaps |= DDSCAPS_FLIP | DDSCAPS_COMPLEX;
		dd->primarydesc.dwBackBufferCount = 2;
	}

	// create the primary surface and report errors
	result = create_surface(dd, &dd->primarydesc, &dd->primary, "primary");
	if (result != DD_OK) goto error;

	// full screen mode: get the back surface
	dd->back = NULL;
	if (window->fullscreen && video_config.triplebuf)
	{
		DDSCAPS2 caps = { DDSCAPS_BACKBUFFER };
		result = IDirectDrawSurface7_GetAttachedSurface(dd->primary, &caps, &dd->back);
		if (result != DD_OK)
		{
			mame_printf_verbose("DirectDraw: Error %08X getting attached back surface\n", (int)result);
			goto error;
		}
	}

	// now make a description of our blit surface, based on the primary surface
	if (dd->blitwidth == 0 || dd->blitheight == 0)
		compute_blit_surface_size(window);
	dd->blitdesc = dd->primarydesc;
	dd->blitdesc.dwFlags = DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT | DDSD_CAPS;
	dd->blitdesc.dwWidth = dd->blitwidth;
	dd->blitdesc.dwHeight = dd->blitheight;
	dd->blitdesc.ddsCaps.dwCaps = DDSCAPS_VIDEOMEMORY;

	// then create the blit surface, fall back to system memory if video mem doesn't work
	result = create_surface(dd, &dd->blitdesc, &dd->blit, "blit");
	if (result != DD_OK)
	{
		dd->blitdesc.ddsCaps.dwCaps = DDSCAPS_SYSTEMMEMORY;
		result = create_surface(dd, &dd->blitdesc, &dd->blit, "blit");
	}
	if (result != DD_OK) goto error;

	// create a memory buffer for offscreen drawing
	if (dd->membuffersize < dd->blitwidth * dd->blitheight * 4)
	{
		dd->membuffersize = dd->blitwidth * dd->blitheight * 4;
		dd->membuffer = realloc(dd->membuffer, dd->membuffersize);
	}
	if (dd->membuffer == NULL)
		goto error;

#ifdef MESS
	// create a clipper for all modes, since MESS has dialogs
	if (create_clipper(window))
		goto error;
#else
	// create a clipper for windowed mode
	if (!window->fullscreen && create_clipper(window))
		goto error;
#endif

	// full screen mode: set the gamma
	if (window->fullscreen)
	{
		// only set the gamma if it's not 1.0f
		float brightness = options_get_float(mame_options(), WINOPTION_FULLSCREENBRIGHTNESS);
		float contrast = options_get_float(mame_options(), WINOPTION_FULLLSCREENCONTRAST);
		float gamma = options_get_float(mame_options(), WINOPTION_FULLSCREENGAMMA);
		if (brightness != 1.0f || contrast != 1.0f || gamma != 1.0f)
		{
			// see if we can get a GammaControl object
			result = IDirectDrawSurface_QueryInterface(dd->primary, &IID_IDirectDrawGammaControl, (void **)&dd->gamma);
			if (result != DD_OK)
			{
				mame_printf_warning("DirectDraw: Warning - device does not support full screen gamma correction.\n");
				dd->gamma = NULL;
			}

			// proceed if we can
			if (dd->gamma != NULL)
			{
				DDGAMMARAMP ramp;
				int i;

				// create a standard ramp and set it
				for (i = 0; i < 256; i++)
					ramp.red[i] = ramp.green[i] = ramp.blue[i] = apply_brightness_contrast_gamma(i, brightness, contrast, gamma) << 8;

				// attempt to set it
				result = IDirectDrawGammaControl_SetGammaRamp(dd->gamma, 0, &ramp);
				if (result != DD_OK)
					mame_printf_verbose("DirectDraw: Error %08X attempting to set gamma correction.\n", (int)result);
			}
		}
	}

	// force some updates
	update_outer_rects(dd);
	return 0;

error:
	ddraw_delete_surfaces(window);
	return 1;
}
예제 #4
0
static int drawdd_window_draw(win_window_info *window, HDC dc, int update)
{
	dd_info *dd = window->drawdata;
	const render_primitive *prim;
	int usemembuffer = FALSE;
	HRESULT result;

	// if we haven't been created, just punt
	if (dd == NULL)
		return 1;

	// if we're updating, remember to erase the outer stuff
	if (update)
		update_outer_rects(dd);

	// if we have a ddraw object, check the cooperative level
	if (ddraw_test_cooperative(window))
		return 1;

	// get the size; if we're too small, delete the existing surfaces
	if (dd->blitwidth > dd->blitdesc.dwWidth || dd->blitheight > dd->blitdesc.dwHeight)
		ddraw_delete_surfaces(window);

	// if we need to create surfaces, do it now
	if (dd->blit == NULL && ddraw_create_surfaces(window) != 0)
		return 1;

	// select our surface and lock it
	result = IDirectDrawSurface7_Lock(dd->blit, NULL, &dd->blitdesc, DDLOCK_WAIT, NULL);
	if (result == DDERR_SURFACELOST)
	{
		mame_printf_verbose("DirectDraw: Lost surfaces; deleting and retrying next frame\n");
		ddraw_delete_surfaces(window);
		return 1;
	}
	if (result != DD_OK)
	{
		mame_printf_verbose("DirectDraw: Error %08X locking blit surface\n", (int)result);
		return 1;
	}

	// render to it
	osd_lock_acquire(window->primlist->lock);

	// scan the list of primitives for tricky stuff
	for (prim = window->primlist->head; prim != NULL; prim = prim->next)
		if (PRIMFLAG_GET_BLENDMODE(prim->flags) != BLENDMODE_NONE ||
			(prim->texture.base != NULL && PRIMFLAG_GET_TEXFORMAT(prim->flags) == TEXFORMAT_ARGB32))
		{
			usemembuffer = TRUE;
			break;
		}

	// if we're using the memory buffer, draw offscreen first and then copy
	if (usemembuffer)
	{
		int x, y;

		// based on the target format, use one of our standard renderers
		switch (dd->blitdesc.ddpfPixelFormat.dwRBitMask)
		{
			case 0x00ff0000: 	drawdd_rgb888_draw_primitives(window->primlist->head, dd->membuffer, dd->blitwidth, dd->blitheight, dd->blitwidth);	break;
			case 0x000000ff:	drawdd_bgr888_draw_primitives(window->primlist->head, dd->membuffer, dd->blitwidth, dd->blitheight, dd->blitwidth);	break;
			case 0xf800:		drawdd_rgb565_draw_primitives(window->primlist->head, dd->membuffer, dd->blitwidth, dd->blitheight, dd->blitwidth);	break;
			case 0x7c00:		drawdd_rgb555_draw_primitives(window->primlist->head, dd->membuffer, dd->blitwidth, dd->blitheight, dd->blitwidth);	break;
			default:
				mame_printf_verbose("DirectDraw: Unknown target mode: R=%08X G=%08X B=%08X\n", (int)dd->blitdesc.ddpfPixelFormat.dwRBitMask, (int)dd->blitdesc.ddpfPixelFormat.dwGBitMask, (int)dd->blitdesc.ddpfPixelFormat.dwBBitMask);
				break;
		}

		// handle copying to both 16bpp and 32bpp destinations
		for (y = 0; y < dd->blitheight; y++)
		{
			if (dd->blitdesc.ddpfPixelFormat.dwRGBBitCount == 32)
			{
				UINT32 *src = (UINT32 *)dd->membuffer + y * dd->blitwidth;
				UINT32 *dst = (UINT32 *)((UINT8 *)dd->blitdesc.lpSurface + y * dd->blitdesc.lPitch);
				for (x = 0; x < dd->blitwidth; x++)
					*dst++ = *src++;
			}
			else if (dd->blitdesc.ddpfPixelFormat.dwRGBBitCount == 16)
			{
				UINT16 *src = (UINT16 *)dd->membuffer + y * dd->blitwidth;
				UINT16 *dst = (UINT16 *)((UINT8 *)dd->blitdesc.lpSurface + y * dd->blitdesc.lPitch);
				for (x = 0; x < dd->blitwidth; x++)
					*dst++ = *src++;
			}
		}

	}

	// otherwise, draw directly
	else
	{
		// based on the target format, use one of our standard renderers
		switch (dd->blitdesc.ddpfPixelFormat.dwRBitMask)
		{
			case 0x00ff0000: 	drawdd_rgb888_nr_draw_primitives(window->primlist->head, dd->blitdesc.lpSurface, dd->blitwidth, dd->blitheight, dd->blitdesc.lPitch / 4);	break;
			case 0x000000ff:	drawdd_bgr888_nr_draw_primitives(window->primlist->head, dd->blitdesc.lpSurface, dd->blitwidth, dd->blitheight, dd->blitdesc.lPitch / 4);	break;
			case 0xf800:		drawdd_rgb565_nr_draw_primitives(window->primlist->head, dd->blitdesc.lpSurface, dd->blitwidth, dd->blitheight, dd->blitdesc.lPitch / 2);	break;
			case 0x7c00:		drawdd_rgb555_nr_draw_primitives(window->primlist->head, dd->blitdesc.lpSurface, dd->blitwidth, dd->blitheight, dd->blitdesc.lPitch / 2);	break;
			default:
				mame_printf_verbose("DirectDraw: Unknown target mode: R=%08X G=%08X B=%08X\n", (int)dd->blitdesc.ddpfPixelFormat.dwRBitMask, (int)dd->blitdesc.ddpfPixelFormat.dwGBitMask, (int)dd->blitdesc.ddpfPixelFormat.dwBBitMask);
				break;
		}
	}
	osd_lock_release(window->primlist->lock);

	// unlock and blit
	result = IDirectDrawSurface7_Unlock(dd->blit, NULL);
	if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X unlocking blit surface\n", (int)result);

	// sync to VBLANK
	if ((video_config.waitvsync || video_config.syncrefresh) && video_get_throttle() && (!window->fullscreen || dd->back == NULL))
	{
		result = IDirectDraw7_WaitForVerticalBlank(dd->ddraw, DDWAITVB_BLOCKBEGIN, NULL);
		if (result != DD_OK) mame_printf_verbose("DirectDraw: Error %08X waiting for VBLANK\n", (int)result);
	}

	// complete the blitting
	blit_to_primary(window, dd->blitwidth, dd->blitheight);
	return 0;
}
예제 #5
0
파일: drawdd.cpp 프로젝트: waisam/mame
int renderer_dd::ddraw_create_surfaces()
{
	HRESULT result;

	// make a description of the primary surface
	memset(&primarydesc, 0, sizeof(primarydesc));
	primarydesc.dwSize = sizeof(primarydesc);
	primarydesc.dwFlags = DDSD_CAPS;
	primarydesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

	// for triple-buffered full screen mode, allocate flipping surfaces
	if (window().fullscreen() && video_config.triplebuf)
	{
		primarydesc.dwFlags |= DDSD_BACKBUFFERCOUNT;
		primarydesc.ddsCaps.dwCaps |= DDSCAPS_FLIP | DDSCAPS_COMPLEX;
		primarydesc.dwBackBufferCount = 2;
	}

	// create the primary surface and report errors
	result = create_surface(&primarydesc, &primary, "primary");
	if (result != DD_OK) goto error;

	// full screen mode: get the back surface
	back = NULL;
	if (window().fullscreen() && video_config.triplebuf)
	{
		DDSCAPS2 caps = { DDSCAPS_BACKBUFFER };
		result = IDirectDrawSurface7_GetAttachedSurface(primary, &caps, &back);
		if (result != DD_OK)
		{
			osd_printf_verbose("DirectDraw: Error %08X getting attached back surface\n", (int)result);
			goto error;
		}
	}

	// now make a description of our blit surface, based on the primary surface
	if (blitwidth == 0 || blitheight == 0)
		compute_blit_surface_size();
	blitdesc = primarydesc;
	blitdesc.dwFlags = DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT | DDSD_CAPS;
	blitdesc.dwWidth = blitwidth;
	blitdesc.dwHeight = blitheight;
	blitdesc.ddsCaps.dwCaps = DDSCAPS_VIDEOMEMORY;

	// then create the blit surface, fall back to system memory if video mem doesn't work
	result = create_surface(&blitdesc, &blit, "blit");
	if (result != DD_OK)
	{
		blitdesc.ddsCaps.dwCaps = DDSCAPS_SYSTEMMEMORY;
		result = create_surface(&blitdesc, &blit, "blit");
	}
	if (result != DD_OK) goto error;

	// create a memory buffer for offscreen drawing
	if (membuffersize < blitwidth * blitheight * 4)
	{
		membuffersize = blitwidth * blitheight * 4;
		global_free_array(membuffer);
		membuffer = global_alloc_array_nothrow(UINT8, membuffersize);
	}
	if (membuffer == NULL)
		goto error;

	// create a clipper for windowed mode
	if (!window().fullscreen() && create_clipper())
		goto error;

	// full screen mode: set the gamma
	if (window().fullscreen())
	{
		// only set the gamma if it's not 1.0f
		windows_options &options = downcast<windows_options &>(window().machine().options());
		float brightness = options.full_screen_brightness();
		float contrast = options.full_screen_contrast();
		float fgamma = options.full_screen_gamma();
		if (brightness != 1.0f || contrast != 1.0f || fgamma != 1.0f)
		{
			// see if we can get a GammaControl object
			result = IDirectDrawSurface_QueryInterface(primary, WRAP_REFIID(IID_IDirectDrawGammaControl), (void **)&gamma);
			if (result != DD_OK)
			{
				osd_printf_warning("DirectDraw: Warning - device does not support full screen gamma correction.\n");
				this->gamma = NULL;
			}

			// proceed if we can
			if (this->gamma != NULL)
			{
				DDGAMMARAMP ramp;
				int i;

				// create a standard ramp and set it
				for (i = 0; i < 256; i++)
					ramp.red[i] = ramp.green[i] = ramp.blue[i] = apply_brightness_contrast_gamma(i, brightness, contrast, fgamma) << 8;

				// attempt to set it
				result = IDirectDrawGammaControl_SetGammaRamp(this->gamma, 0, &ramp);
				if (result != DD_OK)
					osd_printf_verbose("DirectDraw: Error %08X attempting to set gamma correction.\n", (int)result);
			}
		}
	}

	// force some updates
	update_outer_rects();
	return 0;

error:
	ddraw_delete_surfaces();
	return 1;
}
예제 #6
0
파일: drawdd.cpp 프로젝트: waisam/mame
int renderer_dd::draw(const int update)
{
	render_primitive *prim;
	int usemembuffer = FALSE;
	HRESULT result;

	// if we're updating, remember to erase the outer stuff
	if (update)
		update_outer_rects();

	// if we have a ddraw object, check the cooperative level
	if (ddraw_test_cooperative())
		return 1;

	// get the size; if we're too small, delete the existing surfaces
	if (blitwidth > blitdesc.dwWidth || blitheight > blitdesc.dwHeight)
		ddraw_delete_surfaces();

	// if we need to create surfaces, do it now
	if (blit == NULL && ddraw_create_surfaces() != 0)
		return 1;

	// select our surface and lock it
	result = IDirectDrawSurface7_Lock(blit, NULL, &blitdesc, DDLOCK_WAIT, NULL);
	if (result == DDERR_SURFACELOST)
	{
		osd_printf_verbose("DirectDraw: Lost surfaces; deleting and retrying next frame\n");
		ddraw_delete_surfaces();
		return 1;
	}
	if (result != DD_OK)
	{
		osd_printf_verbose("DirectDraw: Error %08X locking blit surface\n", (int)result);
		return 1;
	}

	// render to it
	window().m_primlist->acquire_lock();

	// scan the list of primitives for tricky stuff
	for (prim = window().m_primlist->first(); prim != NULL; prim = prim->next())
		if (PRIMFLAG_GET_BLENDMODE(prim->flags) != BLENDMODE_NONE ||
			(prim->texture.base != NULL && PRIMFLAG_GET_TEXFORMAT(prim->flags) == TEXFORMAT_ARGB32))
		{
			usemembuffer = TRUE;
			break;
		}

	// if we're using the memory buffer, draw offscreen first and then copy
	if (usemembuffer)
	{
		int x, y;

		// based on the target format, use one of our standard renderers
		switch (blitdesc.ddpfPixelFormat.dwRBitMask)
		{
			case 0x00ff0000:    software_renderer<UINT32, 0,0,0, 16,8,0>::draw_primitives(*window().m_primlist, membuffer, blitwidth, blitheight, blitwidth);  break;
			case 0x000000ff:    software_renderer<UINT32, 0,0,0, 0,8,16>::draw_primitives(*window().m_primlist, membuffer, blitwidth, blitheight, blitwidth);  break;
			case 0xf800:        software_renderer<UINT16, 3,2,3, 11,5,0>::draw_primitives(*window().m_primlist, membuffer, blitwidth, blitheight, blitwidth);  break;
			case 0x7c00:        software_renderer<UINT16, 3,3,3, 10,5,0>::draw_primitives(*window().m_primlist, membuffer, blitwidth, blitheight, blitwidth);  break;
			default:
				osd_printf_verbose("DirectDraw: Unknown target mode: R=%08X G=%08X B=%08X\n", (int)blitdesc.ddpfPixelFormat.dwRBitMask, (int)blitdesc.ddpfPixelFormat.dwGBitMask, (int)blitdesc.ddpfPixelFormat.dwBBitMask);
				break;
		}

		// handle copying to both 16bpp and 32bpp destinations
		for (y = 0; y < blitheight; y++)
		{
			if (blitdesc.ddpfPixelFormat.dwRGBBitCount == 32)
			{
				UINT32 *src = (UINT32 *)membuffer + y * blitwidth;
				UINT32 *dst = (UINT32 *)((UINT8 *)blitdesc.lpSurface + y * blitdesc.lPitch);
				for (x = 0; x < blitwidth; x++)
					*dst++ = *src++;
			}
			else if (blitdesc.ddpfPixelFormat.dwRGBBitCount == 16)
			{
				UINT16 *src = (UINT16 *)membuffer + y * blitwidth;
				UINT16 *dst = (UINT16 *)((UINT8 *)blitdesc.lpSurface + y * blitdesc.lPitch);
				for (x = 0; x < blitwidth; x++)
					*dst++ = *src++;
			}
		}

	}

	// otherwise, draw directly
	else
	{
		// based on the target format, use one of our standard renderers
		switch (blitdesc.ddpfPixelFormat.dwRBitMask)
		{
			case 0x00ff0000:    software_renderer<UINT32, 0,0,0, 16,8,0, true>::draw_primitives(*window().m_primlist, blitdesc.lpSurface, blitwidth, blitheight, blitdesc.lPitch / 4); break;
			case 0x000000ff:    software_renderer<UINT32, 0,0,0, 0,8,16, true>::draw_primitives(*window().m_primlist, blitdesc.lpSurface, blitwidth, blitheight, blitdesc.lPitch / 4); break;
			case 0xf800:        software_renderer<UINT16, 3,2,3, 11,5,0, true>::draw_primitives(*window().m_primlist, blitdesc.lpSurface, blitwidth, blitheight, blitdesc.lPitch / 2); break;
			case 0x7c00:        software_renderer<UINT16, 3,3,3, 10,5,0, true>::draw_primitives(*window().m_primlist, blitdesc.lpSurface, blitwidth, blitheight, blitdesc.lPitch / 2); break;
			default:
				osd_printf_verbose("DirectDraw: Unknown target mode: R=%08X G=%08X B=%08X\n", (int)blitdesc.ddpfPixelFormat.dwRBitMask, (int)blitdesc.ddpfPixelFormat.dwGBitMask, (int)blitdesc.ddpfPixelFormat.dwBBitMask);
				break;
		}
	}
	window().m_primlist->release_lock();

	// unlock and blit
	result = IDirectDrawSurface7_Unlock(blit, NULL);
	if (result != DD_OK) osd_printf_verbose("DirectDraw: Error %08X unlocking blit surface\n", (int)result);

	// sync to VBLANK
	if ((video_config.waitvsync || video_config.syncrefresh) && window().machine().video().throttled() && (!window().fullscreen() || back == NULL))
	{
		result = IDirectDraw7_WaitForVerticalBlank(ddraw, DDWAITVB_BLOCKBEGIN, NULL);
		if (result != DD_OK) osd_printf_verbose("DirectDraw: Error %08X waiting for VBLANK\n", (int)result);
	}

	// complete the blitting
	blit_to_primary(blitwidth, blitheight);
	return 0;
}