dglpf.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

				lpDD1,
				&IID_IDirectDraw4,
				(void**)&lpDD4);
	if (FAILED(hRes)) {
		ddlogError(DDLOG_ERROR, "dglBPFL: QueryInterface (DD4) failed", hRes);
		goto clean_up;
	}


	// Retrieve caps of current display mode
	ZeroMemory(&ddsdDisplayMode, sizeof(ddsdDisplayMode));
	ddsdDisplayMode.dwSize = sizeof(ddsdDisplayMode);
	hRes = IDirectDraw4_GetDisplayMode(lpDD4, &ddsdDisplayMode);
	if (FAILED(hRes))
		goto clean_up;

	dwDisplayBitDepth = ddsdDisplayMode.ddpfPixelFormat.dwRGBBitCount;
	dwPixelType = (dwDisplayBitDepth <= 8) ? PFD_TYPE_COLORINDEX : PFD_TYPE_RGBA;
	dwRb = BitCount(ddsdDisplayMode.ddpfPixelFormat.dwRBitMask);
	dwGb = BitCount(ddsdDisplayMode.ddpfPixelFormat.dwGBitMask);
	dwBb = BitCount(ddsdDisplayMode.ddpfPixelFormat.dwBBitMask);
	dwRs = BitShift(ddsdDisplayMode.ddpfPixelFormat.dwRBitMask);
	dwGs = BitShift(ddsdDisplayMode.ddpfPixelFormat.dwGBitMask);
	dwBs = BitShift(ddsdDisplayMode.ddpfPixelFormat.dwBBitMask);

	if (BitCount(ddsdDisplayMode.ddpfPixelFormat.dwRGBAlphaBitMask)) {
		dwAb = BitCount(ddsdDisplayMode.ddpfPixelFormat.dwRGBAlphaBitMask);
		dwAs = BitShift(ddsdDisplayMode.ddpfPixelFormat.dwRGBAlphaBitMask);
	} else {
		dwAb = 0;
		dwAs = 0;
	}

	// Query for available display modes
	ddlogMessage(DDLOG_INFO, "\n");
	ddlogMessage(DDLOG_INFO, "Display Modes:\n");

	// Pass 1: Determine count
	iEnumCount = 0;
	hRes = IDirectDraw4_EnumDisplayModes(
				lpDD4,
				0,
				NULL,
				NULL,
				EnumDisplayModesCallback);
	if (FAILED(hRes)) {
		ddlogError(DDLOG_ERROR, "dglBPFL: EnumDisplayModes failed", hRes);
		goto clean_up;
	}
	if (iEnumCount == 0) {
		ddlogMessage(DDLOG_ERROR, "dglBPFL: No display modes found");
		goto clean_up;
	}
	glb.lpDisplayModes = (DDSURFACEDESC2 *)calloc(iEnumCount,
												sizeof(DDSURFACEDESC2));
	if (glb.lpDisplayModes == NULL) {
		ddlogMessage(DDLOG_ERROR, "dglBPFL: DDSURFACEDESC2 calloc failed");
		goto clean_up;
	}
	glb.nDisplayModeCount = iEnumCount;
	// Pass 2: Save modes
	iEnumCount = 0;
	hRes = IDirectDraw4_EnumDisplayModes(
				lpDD4,
				0,
				NULL,
				(void *)glb.lpDisplayModes,
				EnumDisplayModesCallback);
	if (FAILED(hRes)) {
		ddlogError(DDLOG_ERROR, "dglBPFL: EnumDisplayModes failed", hRes);
		goto clean_up;
	}
							  // Query for IDirect3D3 interface
	hRes = IDirectDraw4_QueryInterface(
				lpDD4,
				&IID_IDirect3D3,
				(void**)&lpD3D3);
	if (FAILED(hRes)) {
		ddlogError(DDLOG_ERROR, "dglBPFL: QueryInterface (D3D3) failed", hRes);
		goto clean_up;
	}

	ddlogMessage(DDLOG_INFO, "\n");
	ddlogMessage(DDLOG_INFO, "ZBuffer formats:\n");

	// Pass 1. Count the ZBuffer pixel formats
	hRes = IDirect3D3_EnumZBufferFormats(
				lpD3D3,
				&glb.d3dGuid,
				d3dEnumZBufferFormatsCallback,
				NULL);

	if (FAILED(hRes))
		goto clean_up;

	if (glb.nZBufferPFCount) {
		glb.lpZBufferPF = (DDPIXELFORMAT *)calloc(glb.nZBufferPFCount,
												sizeof(DDPIXELFORMAT));
		if(glb.lpZBufferPF == NULL)
			goto clean_up;

		// Pass 2. Cache the ZBuffer pixel formats
		iEnumCount = 0; // (Used by the enum function)
		hRes = IDirect3D3_EnumZBufferFormats(
					lpD3D3,
					&glb.d3dGuid,
					d3dEnumZBufferFormatsCallback,
					glb.lpZBufferPF);

		if (FAILED(hRes))
			goto clean_up;
	}

	// Remove stencil support for boards which don't work for AutoCAD;
	// Matrox G400 does not work, but NVidia TNT2 and ATI Rage128 do... (DaveM)
	if (IsStencilSupportBroken(lpDD4)) {
		for (i=0; i<iEnumCount; i++)
			if (glb.lpZBufferPF[i].dwFlags & DDPF_STENCILBUFFER)
				glb.nZBufferPFCount--;
	}

	// One each for every ZBuffer pixel format (including no depth buffer)
	// Times-two because duplicated for single buffering (as opposed to double)
	glb.nPixelFormatCount = 2 * (glb.nZBufferPFCount + 1);
	glb.lpPF = (DGL_pixelFormat *)calloc(glb.nPixelFormatCount,
										sizeof(DGL_pixelFormat));
	if (glb.lpPF == NULL)
		goto clean_up;
	//
	// Fill in the pixel formats
	// Note: Depth buffer bits are really (dwZBufferBitDepth-dwStencilBitDepth)
	//		 but this will pass wierd numbers to the OpenGL app. (?)
	//

	pfTemplateHW.pfd.iPixelType		= dwPixelType;
	pfTemplateHW.pfd.cColorBits		= dwDisplayBitDepth;
	pfTemplateHW.pfd.cRedBits		= dwRb;
	pfTemplateHW.pfd.cGreenBits		= dwGb;
	pfTemplateHW.pfd.cBlueBits		= dwBb;
	pfTemplateHW.pfd.cAlphaBits		= dwAb;
	pfTemplateHW.pfd.cRedShift		= dwRs;
	pfTemplateHW.pfd.cGreenShift	= dwGs;
	pfTemplateHW.pfd.cBlueShift		= dwBs;
	pfTemplateHW.pfd.cAlphaShift	= dwAs;

	lpPF = glb.lpPF;

	// Fill in the double-buffered pixel formats
	for (i=0; i<(glb.nZBufferPFCount + 1); i++, lpPF++) {
		memcpy(lpPF, &pfTemplateHW, sizeof(DGL_pixelFormat));
		if (i) {
			lpPF->iZBufferPF		= i-1;
			lpPF->pfd.cDepthBits	= glb.lpZBufferPF[i-1].dwZBufferBitDepth;
			lpPF->pfd.cStencilBits	= glb.lpZBufferPF[i-1].dwStencilBitDepth;
		}
	}
	// Fill in the single-buffered pixel formats
	for (i=0; i<(glb.nZBufferPFCount + 1); i++, lpPF++) {
		memcpy(lpPF, &pfTemplateHW, sizeof(DGL_pixelFormat));
		if (i) {
			lpPF->iZBufferPF		= i-1;
			lpPF->pfd.cDepthBits	= glb.lpZBufferPF[i-1].dwZBufferBitDepth;
			lpPF->pfd.cStencilBits	= glb.lpZBufferPF[i-1].dwStencilBitDepth;
		}
		// Remove double-buffer flag. Could use XOR instead...
		lpPF->pfd.dwFlags &= (~(PFD_DOUBLEBUFFER));
		// Insert GDI flag for single buffered format only.
		lpPF->pfd.dwFlags |= PFD_SUPPORT_GDI;
	}
#endif // _USE_GLD3_WGL

	// Lets dump the list to the log
	// ** Based on "wglinfo" by Nate Robins **
	ddlogMessage(DDLOG_INFO, "\n");
	ddlogMessage(DDLOG_INFO, "Pixel Formats:\n");
	ddlogMessage(DDLOG_INFO,
		"   visual  x  bf lv rg d st  r  g  b a  ax dp st accum buffs  ms\n");
	ddlogMessage(DDLOG_INFO,
		" id dep cl sp sz l  ci b ro sz sz sz sz bf th cl  r  g  b  a ns b\n");
	ddlogMessage(DDLOG_INFO,
		"-----------------------------------------------------------------\n");
	for (i=0, lpPF = glb.lpPF; i<glb.nPixelFormatCount; i++, lpPF++) {
		sprintf(buf, "0x%02x ", i+1);

		sprintf(cat, "%2d ", lpPF->pfd.cColorBits);
		strcat(buf, cat);
		if(lpPF->pfd.dwFlags & PFD_DRAW_TO_WINDOW)      sprintf(cat, "wn ");
		else if(lpPF->pfd.dwFlags & PFD_DRAW_TO_BITMAP) sprintf(cat, "bm ");
		else sprintf(cat, ".  ");
		strcat(buf, cat);

		/* should find transparent pixel from LAYERPLANEDESCRIPTOR */
		sprintf(cat, " . "); 
		strcat(buf, cat);

		sprintf(cat, "%2d ", lpPF->pfd.cColorBits);
		strcat(buf, cat);

		/* bReserved field indicates number of over/underlays */
		if(lpPF->pfd.bReserved) sprintf(cat, " %d ", lpPF->pfd.bReserved);
		else sprintf(cat, " . "); 
		strcat(buf, cat);

		sprintf(cat, " %c ", lpPF->pfd.iPixelType == PFD_TYPE_RGBA ? 'r' : 'c');
		strcat(buf, cat);

		sprintf(cat, "%c ", lpPF->pfd.dwFlags & PFD_DOUBLEBUFFER ? 'y' : '.');
		strcat(buf, cat);

		sprintf(cat, " %c ", lpPF->pfd.dwFlags & PFD_STEREO ? 'y' : '.');
		strcat(buf, cat);

		if(lpPF->pfd.cRedBits && lpPF->pfd.iPixelType == PFD_TYPE_RGBA) 
		    sprintf(cat, "%2d ", lpPF->pfd.cRedBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);

		if(lpPF->pfd.cGreenBits && lpPF->pfd.iPixelType == PFD_TYPE_RGBA) 
		    sprintf(cat, "%2d ", lpPF->pfd.cGreenBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);

		if(lpPF->pfd.cBlueBits && lpPF->pfd.iPixelType == PFD_TYPE_RGBA) 
		    sprintf(cat, "%2d ", lpPF->pfd.cBlueBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		if(lpPF->pfd.cAlphaBits && lpPF->pfd.iPixelType == PFD_TYPE_RGBA) 
			sprintf(cat, "%2d ", lpPF->pfd.cAlphaBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		if(lpPF->pfd.cAuxBuffers)     sprintf(cat, "%2d ", lpPF->pfd.cAuxBuffers);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		if(lpPF->pfd.cDepthBits)      sprintf(cat, "%2d ", lpPF->pfd.cDepthBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		if(lpPF->pfd.cStencilBits)    sprintf(cat, "%2d ", lpPF->pfd.cStencilBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		if(lpPF->pfd.cAccumRedBits)   sprintf(cat, "%2d ", lpPF->pfd.cAccumRedBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);

		if(lpPF->pfd.cAccumGreenBits) sprintf(cat, "%2d ", lpPF->pfd.cAccumGreenBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		if(lpPF->pfd.cAccumBlueBits)  sprintf(cat, "%2d ", lpPF->pfd.cAccumBlueBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		if(lpPF->pfd.cAccumAlphaBits) sprintf(cat, "%2d ", lpPF->pfd.cAccumAlphaBits);
		else sprintf(cat, " . ");
		strcat(buf, cat);
	
		/* no multisample in Win32 */
		sprintf(cat, " . .\n");
		strcat(buf, cat);

		ddlogMessage(DDLOG_INFO, buf);
	}
	ddlogMessage(DDLOG_INFO,
		"-----------------------------------------------------------------\n");
	ddlogMessage(DDLOG_INFO, "\n");

#ifndef _USE_GLD3_WGL
clean_up:
	// Release COM objects
	RELEASE(lpD3D3);
	RELEASE(lpDD4);
	RELEASE(lpDD1);

	// Popup warning message if non RGB color mode
	if (dwDisplayBitDepth <= 8) {
		ddlogPrintf(DDLOG_WARN, "Current Color Depth %d bpp is not supported", dwDisplayBitDepth);
		MessageBox(NULL, szColorDepthWarning, "GLDirect", MB_OK | MB_ICONWARNING);
	}
#endif // _USE_GLD3_WGL
}

// ***********************************************************************

void dglReleasePixelFormatList()
{
	glb.nPixelFormatCount = 0;
	if (glb.lpPF) {
		free(glb.lpPF);
		glb.lpPF = NULL;
	}
#ifndef _USE_GLD3_WGL
	glb.nZBufferPFCount = 0;
	if (glb.lpZBufferPF) {
		free(glb.lpZBufferPF);
		glb.lpZBufferPF = NULL;
	}
	glb.nDisplayModeCount = 0;
	if (glb.lpDisplayModes) {
		free(glb.lpDisplayModes);
		glb.lpDisplayModes = NULL;
	}
#endif // _USE_GLD3_WGL
}

// ***********************************************************************