static Bool
winInitScreenShadowGDI(ScreenPtr pScreen)
{
winScreenPriv(pScreen);
/* Get device contexts for the screen and shadow bitmap */
pScreenPriv->hdcScreen = GetDC(pScreenPriv->hwndScreen);
pScreenPriv->hdcShadow = CreateCompatibleDC(pScreenPriv->hdcScreen);
/* Allocate bitmap info header */
pScreenPriv->pbmih = malloc(sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
if (pScreenPriv->pbmih == NULL) {
ErrorF("winInitScreenShadowGDI - malloc () failed\n");
return FALSE;
}
/* Query the screen format */
if (!winQueryScreenDIBFormat(pScreen, pScreenPriv->pbmih)) {
ErrorF("winInitScreenShadowGDI - winQueryScreenDIBFormat failed\n");
return FALSE;
}
/* Determine our color masks */
if (!winQueryRGBBitsAndMasks(pScreen)) {
ErrorF("winInitScreenShadowGDI - winQueryRGBBitsAndMasks failed\n");
return FALSE;
}
return winAllocateFBShadowGDI(pScreen);
}
static Bool
winAllocateFBShadowGDI (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
BITMAPINFOHEADER *pbmih = NULL;
DIBSECTION dibsection;
Bool fReturn = TRUE;
/* Get device contexts for the screen and shadow bitmap */
pScreenPriv->hdcScreen = GetDC (pScreenPriv->hwndScreen);
pScreenPriv->hdcShadow = CreateCompatibleDC (pScreenPriv->hdcScreen);
/* Allocate bitmap info header */
pbmih = (BITMAPINFOHEADER*) malloc (sizeof (BITMAPINFOHEADER)
+ 256 * sizeof (RGBQUAD));
if (pbmih == NULL)
{
ErrorF ("winAllocateFBShadowGDI - malloc () failed\n");
return FALSE;
}
/* Query the screen format */
fReturn = winQueryScreenDIBFormat (pScreen, pbmih);
/* Describe shadow bitmap to be created */
pbmih->biWidth = pScreenInfo->dwWidth;
pbmih->biHeight = -pScreenInfo->dwHeight;
ErrorF ("winAllocateFBShadowGDI - Creating DIB with width: %d height: %d "
"depth: %d\n",
(int) pbmih->biWidth, (int) -pbmih->biHeight, pbmih->biBitCount);
/* Create a DI shadow bitmap with a bit pointer */
pScreenPriv->hbmpShadow = CreateDIBSection (pScreenPriv->hdcScreen,
(BITMAPINFO *) pbmih,
DIB_RGB_COLORS,
(VOID**) &pScreenInfo->pfb,
NULL,
0);
if (pScreenPriv->hbmpShadow == NULL || pScreenInfo->pfb == NULL)
{
winW32Error (2, "winAllocateFBShadowGDI - CreateDIBSection failed:");
return FALSE;
}
else
{
#if CYGDEBUG
winDebug ("winAllocateFBShadowGDI - Shadow buffer allocated\n");
#endif
}
/* Get information about the bitmap that was allocated */
GetObject (pScreenPriv->hbmpShadow,
sizeof (dibsection),
&dibsection);
#if CYGDEBUG || YES
/* Print information about bitmap allocated */
winDebug ("winAllocateFBShadowGDI - Dibsection width: %d height: %d "
"depth: %d size image: %d\n",
(int) dibsection.dsBmih.biWidth, (int) dibsection.dsBmih.biHeight,
dibsection.dsBmih.biBitCount,
(int) dibsection.dsBmih.biSizeImage);
#endif
/* Select the shadow bitmap into the shadow DC */
SelectObject (pScreenPriv->hdcShadow,
pScreenPriv->hbmpShadow);
#if CYGDEBUG
winDebug ("winAllocateFBShadowGDI - Attempting a shadow blit\n");
#endif
/* Do a test blit from the shadow to the screen, I think */
fReturn = BitBlt (pScreenPriv->hdcScreen,
0, 0,
pScreenInfo->dwWidth, pScreenInfo->dwHeight,
pScreenPriv->hdcShadow,
0, 0,
SRCCOPY);
if (fReturn)
{
#if CYGDEBUG
winDebug ("winAllocateFBShadowGDI - Shadow blit success\n");
#endif
}
else
{
winW32Error (2, "winAllocateFBShadowGDI - Shadow blit failure\n");
#if 0
return FALSE;
#else
/* ago: ignore this error. The blit fails with wine, but does not
* cause any problems later. */
fReturn = TRUE;
#endif
}
/* Look for height weirdness */
if (dibsection.dsBmih.biHeight < 0)
{
dibsection.dsBmih.biHeight = -dibsection.dsBmih.biHeight;
}
/* Set screeninfo stride */
pScreenInfo->dwStride = ((dibsection.dsBmih.biSizeImage
/ dibsection.dsBmih.biHeight)
* 8) / pScreenInfo->dwBPP;
#if CYGDEBUG || YES
winDebug ("winAllocateFBShadowGDI - Created shadow stride: %d\n",
(int) pScreenInfo->dwStride);
#endif
/* See if the shadow bitmap will be larger than the DIB size limit */
if (pScreenInfo->dwWidth * pScreenInfo->dwHeight * pScreenInfo->dwBPP
>= WIN_DIB_MAXIMUM_SIZE)
{
ErrorF ("winAllocateFBShadowGDI - Requested DIB (bitmap) "
"will be larger than %d MB. The surface may fail to be "
"allocated on Windows 95, 98, or Me, due to a %d MB limit in "
"DIB size. This limit does not apply to Windows NT/2000, and "
"this message may be ignored on those platforms.\n",
WIN_DIB_MAXIMUM_SIZE_MB, WIN_DIB_MAXIMUM_SIZE_MB);
}
/* Determine our color masks */
if (!winQueryRGBBitsAndMasks (pScreen))
{
ErrorF ("winAllocateFBShadowGDI - winQueryRGBBitsAndMasks failed\n");
return FALSE;
}
#ifdef XWIN_MULTIWINDOW
/* Redraw all windows */
if (pScreenInfo->fMultiWindow)
EnumThreadWindows (g_dwCurrentThreadID, winRedrawAllProcShadowGDI, 0);
#endif
return fReturn;
}
static
Bool
winQueryRGBBitsAndMasks (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
BITMAPINFOHEADER *pbmih = NULL;
Bool fReturn = TRUE;
LPDWORD pdw = NULL;
DWORD dwRedBits, dwGreenBits, dwBlueBits;
/* Color masks for 8 bpp are standardized */
if (GetDeviceCaps (pScreenPriv->hdcScreen, RASTERCAPS) & RC_PALETTE)
{
/*
* RGB BPP for 8 bit palletes is always 8
* and the color masks are always 0.
*/
pScreenPriv->dwBitsPerRGB = 8;
pScreenPriv->dwRedMask = 0x0L;
pScreenPriv->dwGreenMask = 0x0L;
pScreenPriv->dwBlueMask = 0x0L;
return TRUE;
}
/* Color masks for 24 bpp are standardized */
if (GetDeviceCaps (pScreenPriv->hdcScreen, PLANES)
* GetDeviceCaps (pScreenPriv->hdcScreen, BITSPIXEL) == 24)
{
ErrorF ("winQueryRGBBitsAndMasks - GetDeviceCaps (BITSPIXEL) "
"returned 24 for the screen. Using default 24bpp masks.\n");
/* 8 bits per primary color */
pScreenPriv->dwBitsPerRGB = 8;
/* Set screen privates masks */
pScreenPriv->dwRedMask = WIN_24BPP_MASK_RED;
pScreenPriv->dwGreenMask = WIN_24BPP_MASK_GREEN;
pScreenPriv->dwBlueMask = WIN_24BPP_MASK_BLUE;
return TRUE;
}
/* Allocate a bitmap header and color table */
pbmih = (BITMAPINFOHEADER*) malloc (sizeof (BITMAPINFOHEADER)
+ 256 * sizeof (RGBQUAD));
if (pbmih == NULL)
{
ErrorF ("winQueryRGBBitsAndMasks - malloc failed\n");
return FALSE;
}
/* Get screen description */
if (winQueryScreenDIBFormat (pScreen, pbmih))
{
/* Get a pointer to bitfields */
pdw = (DWORD*) ((CARD8*)pbmih + sizeof (BITMAPINFOHEADER));
#if CYGDEBUG
winDebug ("%s - Masks: %08x %08x %08x\n", __FUNCTION__,
pdw[0], pdw[1], pdw[2]);
winDebug ("%s - Bitmap: %dx%d %d bpp %d planes\n", __FUNCTION__,
pbmih->biWidth, pbmih->biHeight, pbmih->biBitCount, pbmih->biPlanes);
winDebug ("%s - Compression: %d %s\n", __FUNCTION__,
pbmih->biCompression,
(pbmih->biCompression == BI_RGB?"(BI_RGB)":
(pbmih->biCompression == BI_RLE8?"(BI_RLE8)":
(pbmih->biCompression == BI_RLE4?"(BI_RLE4)":
(pbmih->biCompression == BI_BITFIELDS?"(BI_BITFIELDS)":""
)))));
#endif
/* Handle BI_RGB case, which is returned by Wine */
if (pbmih->biCompression == BI_RGB)
{
dwRedBits = 5;
dwGreenBits = 5;
dwBlueBits = 5;
pScreenPriv->dwBitsPerRGB = 5;
/* Set screen privates masks */
pScreenPriv->dwRedMask = 0x7c00;
pScreenPriv->dwGreenMask = 0x03e0;
pScreenPriv->dwBlueMask = 0x001f;
}
else
{
/* Count the number of bits in each mask */
dwRedBits = winCountBits (pdw[0]);
dwGreenBits = winCountBits (pdw[1]);
dwBlueBits = winCountBits (pdw[2]);
/* Find maximum bits per red, green, blue */
if (dwRedBits > dwGreenBits && dwRedBits > dwBlueBits)
pScreenPriv->dwBitsPerRGB = dwRedBits;
else if (dwGreenBits > dwRedBits && dwGreenBits > dwBlueBits)
pScreenPriv->dwBitsPerRGB = dwGreenBits;
else
pScreenPriv->dwBitsPerRGB = dwBlueBits;
/* Set screen privates masks */
pScreenPriv->dwRedMask = pdw[0];
pScreenPriv->dwGreenMask = pdw[1];
pScreenPriv->dwBlueMask = pdw[2];
}
}
else
{
ErrorF ("winQueryRGBBitsAndMasks - winQueryScreenDIBFormat failed\n");
free (pbmih);
fReturn = FALSE;
}
/* Free memory */
free (pbmih);
return fReturn;
}
static
Bool
winQueryRGBBitsAndMasks (ScreenPtr pScreen)
{
winScreenPriv(pScreen);
BITMAPINFOHEADER *pbmih = NULL;
Bool fReturn = TRUE;
LPDWORD pdw = NULL;
DWORD dwRedBits, dwGreenBits, dwBlueBits;
/* Color masks for 8 bpp are standardized */
if (GetDeviceCaps (pScreenPriv->hdcScreen, RASTERCAPS) & RC_PALETTE)
{
/*
* RGB BPP for 8 bit palletes is always 8
* and the color masks are always 0.
*/
pScreenPriv->dwBitsPerRGB = 8;
pScreenPriv->dwRedMask = 0x0L;
pScreenPriv->dwGreenMask = 0x0L;
pScreenPriv->dwBlueMask = 0x0L;
return TRUE;
}
/* Color masks for 24 bpp are standardized */
if (GetDeviceCaps (pScreenPriv->hdcScreen, PLANES)
* GetDeviceCaps (pScreenPriv->hdcScreen, BITSPIXEL) == 24)
{
ErrorF ("winQueryRGBBitsAndMasks - GetDeviceCaps (BITSPIXEL) "
"returned 24 for the screen. Using default 24bpp masks.\n");
/* 8 bits per primary color */
pScreenPriv->dwBitsPerRGB = 8;
/* Set screen privates masks */
pScreenPriv->dwRedMask = WIN_24BPP_MASK_RED;
pScreenPriv->dwGreenMask = WIN_24BPP_MASK_GREEN;
pScreenPriv->dwBlueMask = WIN_24BPP_MASK_BLUE;
return TRUE;
}
/* Allocate a bitmap header and color table */
pbmih = (BITMAPINFOHEADER*) malloc (sizeof (BITMAPINFOHEADER)
+ 256 * sizeof (RGBQUAD));
if (pbmih == NULL)
{
ErrorF ("winQueryRGBBitsAndMasks - malloc failed\n");
return FALSE;
}
/* Get screen description */
if (winQueryScreenDIBFormat (pScreen, pbmih))
{
/* Get a pointer to bitfields */
pdw = (DWORD*) ((CARD8*)pbmih + sizeof (BITMAPINFOHEADER));
#if CYGDEBUG
ErrorF ("winQueryRGBBitsAndMasks - Masks: %08x %08x %08x\n",
pdw[0], pdw[1], pdw[2]);
#endif
/* Count the number of bits in each mask */
dwRedBits = winCountBits (pdw[0]);
dwGreenBits = winCountBits (pdw[1]);
dwBlueBits = winCountBits (pdw[2]);
/* Find maximum bits per red, green, blue */
if (dwRedBits > dwGreenBits && dwRedBits > dwBlueBits)
pScreenPriv->dwBitsPerRGB = dwRedBits;
else if (dwGreenBits > dwRedBits && dwGreenBits > dwBlueBits)
pScreenPriv->dwBitsPerRGB = dwGreenBits;
else
pScreenPriv->dwBitsPerRGB = dwBlueBits;
/* Set screen privates masks */
pScreenPriv->dwRedMask = pdw[0];
pScreenPriv->dwGreenMask = pdw[1];
pScreenPriv->dwBlueMask = pdw[2];
}
else
{
ErrorF ("winQueryRGBBitsAndMasks - winQueryScreenDIBFormat failed\n");
free (pbmih);
fReturn = FALSE;
}
/* Free memory */
free (pbmih);
return fReturn;
}