| /* |
| * GDI device-independent bitmaps |
| * |
| * Copyright 1993,1994 Alexandre Julliard |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| /* |
| Important information: |
| |
| * Current Windows versions support two different DIB structures: |
| |
| - BITMAPCOREINFO / BITMAPCOREHEADER (legacy structures; used in OS/2) |
| - BITMAPINFO / BITMAPINFOHEADER |
| |
| Most Windows API functions taking a BITMAPINFO* / BITMAPINFOHEADER* also |
| accept the old "core" structures, and so must WINE. |
| You can distinguish them by looking at the first member (bcSize/biSize), |
| or use the internal function DIB_GetBitmapInfo. |
| |
| |
| * The palettes are stored in different formats: |
| |
| - BITMAPCOREINFO: Array of RGBTRIPLE |
| - BITMAPINFO: Array of RGBQUAD |
| |
| |
| * There are even more DIB headers, but they all extend BITMAPINFOHEADER: |
| |
| - BITMAPV4HEADER: Introduced in Windows 95 / NT 4.0 |
| - BITMAPV5HEADER: Introduced in Windows 98 / 2000 |
| |
| If biCompression is BI_BITFIELDS, the color masks are at the same position |
| in all the headers (they start at bmiColors of BITMAPINFOHEADER), because |
| the new headers have structure members for the masks. |
| |
| |
| * You should never access the color table using the bmiColors member, |
| because the passed structure may have one of the extended headers |
| mentioned above. Use this to calculate the location: |
| |
| BITMAPINFO* info; |
| void* colorPtr = (LPBYTE) info + (WORD) info->bmiHeader.biSize; |
| |
| |
| * More information: |
| Search for "Bitmap Structures" in MSDN |
| */ |
| |
| #include <stdarg.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "windef.h" |
| #include "winbase.h" |
| #include "gdi.h" |
| #include "wownt32.h" |
| #include "gdi_private.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(bitmap); |
| |
| |
| /* |
| Some of the following helper functions are duplicated in |
| dlls/x11drv/dib.c |
| */ |
| |
| /*********************************************************************** |
| * DIB_GetDIBWidthBytes |
| * |
| * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned. |
| * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_87eb.asp |
| */ |
| int DIB_GetDIBWidthBytes( int width, int depth ) |
| { |
| int words; |
| |
| switch(depth) |
| { |
| case 1: words = (width + 31) / 32; break; |
| case 4: words = (width + 7) / 8; break; |
| case 8: words = (width + 3) / 4; break; |
| case 15: |
| case 16: words = (width + 1) / 2; break; |
| case 24: words = (width * 3 + 3)/4; break; |
| |
| default: |
| WARN("(%d): Unsupported depth\n", depth ); |
| /* fall through */ |
| case 32: |
| words = width; |
| } |
| return 4 * words; |
| } |
| |
| /*********************************************************************** |
| * DIB_GetDIBImageBytes |
| * |
| * Return the number of bytes used to hold the image in a DIB bitmap. |
| */ |
| int DIB_GetDIBImageBytes( int width, int height, int depth ) |
| { |
| return DIB_GetDIBWidthBytes( width, depth ) * abs( height ); |
| } |
| |
| |
| /*********************************************************************** |
| * DIB_BitmapInfoSize |
| * |
| * Return the size of the bitmap info structure including color table. |
| */ |
| int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse ) |
| { |
| int colors; |
| |
| if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER)) |
| { |
| BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info; |
| colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0; |
| return sizeof(BITMAPCOREHEADER) + colors * |
| ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD)); |
| } |
| else /* assume BITMAPINFOHEADER */ |
| { |
| colors = info->bmiHeader.biClrUsed; |
| if (colors > 256) colors = 256; |
| if (!colors && (info->bmiHeader.biBitCount <= 8)) |
| colors = 1 << info->bmiHeader.biBitCount; |
| return sizeof(BITMAPINFOHEADER) + colors * |
| ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD)); |
| } |
| } |
| |
| |
| /*********************************************************************** |
| * DIB_GetBitmapInfo |
| * |
| * Get the info from a bitmap header. |
| * Return 1 for INFOHEADER, 0 for COREHEADER, |
| * 4 for V4HEADER, 5 for V5HEADER, -1 for error. |
| */ |
| static int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, LONG *width, |
| LONG *height, WORD *planes, WORD *bpp, DWORD *compr, DWORD *size ) |
| { |
| if (header->biSize == sizeof(BITMAPINFOHEADER)) |
| { |
| *width = header->biWidth; |
| *height = header->biHeight; |
| *planes = header->biPlanes; |
| *bpp = header->biBitCount; |
| *compr = header->biCompression; |
| *size = header->biSizeImage; |
| return 1; |
| } |
| if (header->biSize == sizeof(BITMAPCOREHEADER)) |
| { |
| BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header; |
| *width = core->bcWidth; |
| *height = core->bcHeight; |
| *planes = core->bcPlanes; |
| *bpp = core->bcBitCount; |
| *compr = 0; |
| *size = 0; |
| return 0; |
| } |
| if (header->biSize == sizeof(BITMAPV4HEADER)) |
| { |
| BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header; |
| *width = v4hdr->bV4Width; |
| *height = v4hdr->bV4Height; |
| *planes = v4hdr->bV4Planes; |
| *bpp = v4hdr->bV4BitCount; |
| *compr = v4hdr->bV4V4Compression; |
| *size = v4hdr->bV4SizeImage; |
| return 4; |
| } |
| if (header->biSize == sizeof(BITMAPV5HEADER)) |
| { |
| BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header; |
| *width = v5hdr->bV5Width; |
| *height = v5hdr->bV5Height; |
| *planes = v5hdr->bV5Planes; |
| *bpp = v5hdr->bV5BitCount; |
| *compr = v5hdr->bV5Compression; |
| *size = v5hdr->bV5SizeImage; |
| return 5; |
| } |
| ERR("(%ld): unknown/wrong size for header\n", header->biSize ); |
| return -1; |
| } |
| |
| |
| /*********************************************************************** |
| * StretchDIBits (GDI32.@) |
| */ |
| INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst, |
| INT heightDst, INT xSrc, INT ySrc, INT widthSrc, |
| INT heightSrc, const void *bits, |
| const BITMAPINFO *info, UINT wUsage, DWORD dwRop ) |
| { |
| DC *dc; |
| |
| if (!bits || !info) |
| return 0; |
| |
| dc = DC_GetDCUpdate( hdc ); |
| if(!dc) return FALSE; |
| |
| if(dc->funcs->pStretchDIBits) |
| { |
| heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst, |
| heightDst, xSrc, ySrc, widthSrc, |
| heightSrc, bits, info, wUsage, dwRop); |
| GDI_ReleaseObj( hdc ); |
| } |
| else /* use StretchBlt */ |
| { |
| HBITMAP hBitmap, hOldBitmap; |
| HPALETTE hpal = NULL; |
| HDC hdcMem; |
| LONG height; |
| LONG width; |
| WORD planes, bpp; |
| DWORD compr, size; |
| |
| GDI_ReleaseObj( hdc ); |
| |
| if (DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size ) == -1) |
| { |
| ERR("Invalid bitmap\n"); |
| return 0; |
| } |
| |
| if (width < 0) |
| { |
| ERR("Bitmap has a negative width\n"); |
| return 0; |
| } |
| |
| hdcMem = CreateCompatibleDC( hdc ); |
| hBitmap = CreateCompatibleBitmap(hdc, width, height); |
| hOldBitmap = SelectObject( hdcMem, hBitmap ); |
| if(wUsage == DIB_PAL_COLORS) |
| { |
| hpal = GetCurrentObject(hdc, OBJ_PAL); |
| hpal = SelectPalette(hdcMem, hpal, FALSE); |
| } |
| |
| if (info->bmiHeader.biCompression == BI_RLE4 || |
| info->bmiHeader.biCompression == BI_RLE8) { |
| |
| /* when RLE compression is used, there may be some gaps (ie the DIB doesn't |
| * contain all the rectangle described in bmiHeader, but only part of it. |
| * This mean that those undescribed pixels must be left untouched. |
| * So, we first copy on a memory bitmap the current content of the |
| * destination rectangle, blit the DIB bits on top of it - hence leaving |
| * the gaps untouched -, and blitting the rectangle back. |
| * This insure that gaps are untouched on the destination rectangle |
| * Not doing so leads to trashed images (the gaps contain what was on the |
| * memory bitmap => generally black or garbage) |
| * Unfortunately, RLE DIBs without gaps will be slowed down. But this is |
| * another speed vs correctness issue. Anyway, if speed is needed, then the |
| * pStretchDIBits function shall be implemented. |
| * ericP (2000/09/09) |
| */ |
| |
| /* copy existing bitmap from destination dc */ |
| StretchBlt( hdcMem, xSrc, abs(height) - heightSrc - ySrc, |
| widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst, |
| dwRop ); |
| } |
| |
| SetDIBits(hdcMem, hBitmap, 0, height, bits, info, wUsage); |
| |
| /* Origin for DIBitmap may be bottom left (positive biHeight) or top |
| left (negative biHeight) */ |
| StretchBlt( hdc, xDst, yDst, widthDst, heightDst, |
| hdcMem, xSrc, abs(height) - heightSrc - ySrc, |
| widthSrc, heightSrc, dwRop ); |
| if(hpal) |
| SelectPalette(hdcMem, hpal, FALSE); |
| SelectObject( hdcMem, hOldBitmap ); |
| DeleteDC( hdcMem ); |
| DeleteObject( hBitmap ); |
| } |
| return heightSrc; |
| } |
| |
| |
| /****************************************************************************** |
| * SetDIBits [GDI32.@] |
| * |
| * Sets pixels in a bitmap using colors from DIB. |
| * |
| * PARAMS |
| * hdc [I] Handle to device context |
| * hbitmap [I] Handle to bitmap |
| * startscan [I] Starting scan line |
| * lines [I] Number of scan lines |
| * bits [I] Array of bitmap bits |
| * info [I] Address of structure with data |
| * coloruse [I] Type of color indexes to use |
| * |
| * RETURNS |
| * Success: Number of scan lines copied |
| * Failure: 0 |
| */ |
| INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan, |
| UINT lines, LPCVOID bits, const BITMAPINFO *info, |
| UINT coloruse ) |
| { |
| DC *dc; |
| BITMAPOBJ *bitmap; |
| INT result = 0; |
| |
| if (!(dc = DC_GetDCUpdate( hdc ))) |
| { |
| if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" ); |
| return 0; |
| } |
| |
| if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) |
| { |
| GDI_ReleaseObj( hdc ); |
| return 0; |
| } |
| |
| if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done; |
| |
| if (bitmap->funcs && bitmap->funcs->pSetDIBits) |
| result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines, |
| bits, info, coloruse ); |
| else |
| result = lines; |
| |
| done: |
| GDI_ReleaseObj( hbitmap ); |
| GDI_ReleaseObj( hdc ); |
| return result; |
| } |
| |
| |
| /*********************************************************************** |
| * SetDIBitsToDevice (GDI32.@) |
| */ |
| INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx, |
| DWORD cy, INT xSrc, INT ySrc, UINT startscan, |
| UINT lines, LPCVOID bits, const BITMAPINFO *info, |
| UINT coloruse ) |
| { |
| INT ret; |
| DC *dc; |
| |
| if (!(dc = DC_GetDCUpdate( hdc ))) return 0; |
| |
| if(dc->funcs->pSetDIBitsToDevice) |
| ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc, |
| ySrc, startscan, lines, bits, |
| info, coloruse ); |
| else { |
| FIXME("unimplemented on hdc %p\n", hdc); |
| ret = 0; |
| } |
| |
| GDI_ReleaseObj( hdc ); |
| return ret; |
| } |
| |
| /*********************************************************************** |
| * SetDIBColorTable (GDI32.@) |
| */ |
| UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, CONST RGBQUAD *colors ) |
| { |
| DC * dc; |
| UINT result = 0; |
| |
| if (!(dc = DC_GetDCUpdate( hdc ))) return 0; |
| |
| if (dc->funcs->pSetDIBColorTable) |
| result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors); |
| |
| GDI_ReleaseObj( hdc ); |
| return result; |
| } |
| |
| |
| /*********************************************************************** |
| * GetDIBColorTable (GDI32.@) |
| */ |
| UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors ) |
| { |
| DC * dc; |
| UINT result = 0; |
| |
| if (!(dc = DC_GetDCUpdate( hdc ))) return 0; |
| |
| if (dc->funcs->pGetDIBColorTable) |
| result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors); |
| |
| GDI_ReleaseObj( hdc ); |
| return result; |
| } |
| |
| /* FIXME the following two structs should be combined with __sysPalTemplate in |
| objects/color.c - this should happen after de-X11-ing both of these |
| files. |
| NB. RGBQUAD and PALETTEENTRY have different orderings of red, green |
| and blue - sigh */ |
| |
| static const RGBQUAD EGAColorsQuads[16] = { |
| /* rgbBlue, rgbGreen, rgbRed, rgbReserved */ |
| { 0x00, 0x00, 0x00, 0x00 }, |
| { 0x00, 0x00, 0x80, 0x00 }, |
| { 0x00, 0x80, 0x00, 0x00 }, |
| { 0x00, 0x80, 0x80, 0x00 }, |
| { 0x80, 0x00, 0x00, 0x00 }, |
| { 0x80, 0x00, 0x80, 0x00 }, |
| { 0x80, 0x80, 0x00, 0x00 }, |
| { 0x80, 0x80, 0x80, 0x00 }, |
| { 0xc0, 0xc0, 0xc0, 0x00 }, |
| { 0x00, 0x00, 0xff, 0x00 }, |
| { 0x00, 0xff, 0x00, 0x00 }, |
| { 0x00, 0xff, 0xff, 0x00 }, |
| { 0xff, 0x00, 0x00, 0x00 }, |
| { 0xff, 0x00, 0xff, 0x00 }, |
| { 0xff, 0xff, 0x00, 0x00 }, |
| { 0xff, 0xff, 0xff, 0x00 } |
| }; |
| |
| static const RGBTRIPLE EGAColorsTriples[16] = { |
| /* rgbBlue, rgbGreen, rgbRed */ |
| { 0x00, 0x00, 0x00 }, |
| { 0x00, 0x00, 0x80 }, |
| { 0x00, 0x80, 0x00 }, |
| { 0x00, 0x80, 0x80 }, |
| { 0x80, 0x00, 0x00 }, |
| { 0x80, 0x00, 0x80 }, |
| { 0x80, 0x80, 0x00 }, |
| { 0x80, 0x80, 0x80 }, |
| { 0xc0, 0xc0, 0xc0 }, |
| { 0x00, 0x00, 0xff }, |
| { 0x00, 0xff, 0x00 }, |
| { 0x00, 0xff, 0xff }, |
| { 0xff, 0x00, 0x00 } , |
| { 0xff, 0x00, 0xff }, |
| { 0xff, 0xff, 0x00 }, |
| { 0xff, 0xff, 0xff } |
| }; |
| |
| static const RGBQUAD DefLogPaletteQuads[20] = { /* Copy of Default Logical Palette */ |
| /* rgbBlue, rgbGreen, rgbRed, rgbReserved */ |
| { 0x00, 0x00, 0x00, 0x00 }, |
| { 0x00, 0x00, 0x80, 0x00 }, |
| { 0x00, 0x80, 0x00, 0x00 }, |
| { 0x00, 0x80, 0x80, 0x00 }, |
| { 0x80, 0x00, 0x00, 0x00 }, |
| { 0x80, 0x00, 0x80, 0x00 }, |
| { 0x80, 0x80, 0x00, 0x00 }, |
| { 0xc0, 0xc0, 0xc0, 0x00 }, |
| { 0xc0, 0xdc, 0xc0, 0x00 }, |
| { 0xf0, 0xca, 0xa6, 0x00 }, |
| { 0xf0, 0xfb, 0xff, 0x00 }, |
| { 0xa4, 0xa0, 0xa0, 0x00 }, |
| { 0x80, 0x80, 0x80, 0x00 }, |
| { 0x00, 0x00, 0xf0, 0x00 }, |
| { 0x00, 0xff, 0x00, 0x00 }, |
| { 0x00, 0xff, 0xff, 0x00 }, |
| { 0xff, 0x00, 0x00, 0x00 }, |
| { 0xff, 0x00, 0xff, 0x00 }, |
| { 0xff, 0xff, 0x00, 0x00 }, |
| { 0xff, 0xff, 0xff, 0x00 } |
| }; |
| |
| static const RGBTRIPLE DefLogPaletteTriples[20] = { /* Copy of Default Logical Palette */ |
| /* rgbBlue, rgbGreen, rgbRed */ |
| { 0x00, 0x00, 0x00 }, |
| { 0x00, 0x00, 0x80 }, |
| { 0x00, 0x80, 0x00 }, |
| { 0x00, 0x80, 0x80 }, |
| { 0x80, 0x00, 0x00 }, |
| { 0x80, 0x00, 0x80 }, |
| { 0x80, 0x80, 0x00 }, |
| { 0xc0, 0xc0, 0xc0 }, |
| { 0xc0, 0xdc, 0xc0 }, |
| { 0xf0, 0xca, 0xa6 }, |
| { 0xf0, 0xfb, 0xff }, |
| { 0xa4, 0xa0, 0xa0 }, |
| { 0x80, 0x80, 0x80 }, |
| { 0x00, 0x00, 0xf0 }, |
| { 0x00, 0xff, 0x00 }, |
| { 0x00, 0xff, 0xff }, |
| { 0xff, 0x00, 0x00 }, |
| { 0xff, 0x00, 0xff }, |
| { 0xff, 0xff, 0x00 }, |
| { 0xff, 0xff, 0xff} |
| }; |
| |
| |
| /****************************************************************************** |
| * GetDIBits [GDI32.@] |
| * |
| * Retrieves bits of bitmap and copies to buffer. |
| * |
| * RETURNS |
| * Success: Number of scan lines copied from bitmap |
| * Failure: 0 |
| * |
| * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_87eb.asp |
| */ |
| INT WINAPI GetDIBits( |
| HDC hdc, /* [in] Handle to device context */ |
| HBITMAP hbitmap, /* [in] Handle to bitmap */ |
| UINT startscan, /* [in] First scan line to set in dest bitmap */ |
| UINT lines, /* [in] Number of scan lines to copy */ |
| LPVOID bits, /* [out] Address of array for bitmap bits */ |
| BITMAPINFO * info, /* [out] Address of structure with bitmap data */ |
| UINT coloruse) /* [in] RGB or palette index */ |
| { |
| DC * dc; |
| BITMAPOBJ * bmp; |
| int i; |
| HDC memdc; |
| int bitmap_type; |
| BOOL core_header; |
| LONG width; |
| LONG height; |
| WORD planes, bpp; |
| DWORD compr, size; |
| void* colorPtr; |
| RGBTRIPLE* rgbTriples; |
| RGBQUAD* rgbQuads; |
| |
| if (!info) return 0; |
| |
| bitmap_type = DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size); |
| if (bitmap_type == -1) |
| { |
| ERR("Invalid bitmap format\n"); |
| return 0; |
| } |
| core_header = (bitmap_type == 0); |
| memdc = CreateCompatibleDC(hdc); |
| if (!(dc = DC_GetDCUpdate( hdc ))) |
| { |
| DeleteDC(memdc); |
| return 0; |
| } |
| if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) |
| { |
| GDI_ReleaseObj( hdc ); |
| DeleteDC(memdc); |
| return 0; |
| } |
| |
| colorPtr = (LPBYTE) info + (WORD) info->bmiHeader.biSize; |
| rgbTriples = (RGBTRIPLE *) colorPtr; |
| rgbQuads = (RGBQUAD *) colorPtr; |
| |
| /* Transfer color info */ |
| |
| if (bpp <= 8 && bpp > 0) |
| { |
| if (!core_header) info->bmiHeader.biClrUsed = 0; |
| |
| /* If the bitmap object already has a dib section at the |
| same color depth then get the color map from it */ |
| if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == bpp) { |
| if(coloruse == DIB_RGB_COLORS) { |
| HBITMAP oldbm = SelectObject(memdc, hbitmap); |
| unsigned int colors = 1 << bpp; |
| |
| if (core_header) |
| { |
| /* Convert the color table (RGBQUAD to RGBTRIPLE) */ |
| RGBQUAD* buffer = HeapAlloc(GetProcessHeap(), 0, colors * sizeof(RGBQUAD)); |
| |
| if (buffer) |
| { |
| RGBTRIPLE* index = rgbTriples; |
| GetDIBColorTable(memdc, 0, colors, buffer); |
| |
| for (i=0; i < colors; i++, index++) |
| { |
| index->rgbtRed = buffer[i].rgbRed; |
| index->rgbtGreen = buffer[i].rgbGreen; |
| index->rgbtBlue = buffer[i].rgbBlue; |
| } |
| |
| HeapFree(GetProcessHeap(), 0, buffer); |
| } |
| } |
| else |
| { |
| GetDIBColorTable(memdc, 0, colors, colorPtr); |
| } |
| SelectObject(memdc, oldbm); |
| } |
| else { |
| WORD *index = colorPtr; |
| for(i = 0; i < 1 << info->bmiHeader.biBitCount; i++, index++) |
| *index = i; |
| } |
| } |
| else { |
| if(bpp >= bmp->bitmap.bmBitsPixel) { |
| /* Generate the color map from the selected palette */ |
| PALETTEENTRY * palEntry; |
| PALETTEOBJ * palette; |
| if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC ))) { |
| GDI_ReleaseObj( hdc ); |
| GDI_ReleaseObj( hbitmap ); |
| DeleteDC(memdc); |
| return 0; |
| } |
| palEntry = palette->logpalette.palPalEntry; |
| for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) { |
| if (coloruse == DIB_RGB_COLORS) { |
| if (core_header) |
| { |
| rgbTriples[i].rgbtRed = palEntry->peRed; |
| rgbTriples[i].rgbtGreen = palEntry->peGreen; |
| rgbTriples[i].rgbtBlue = palEntry->peBlue; |
| } |
| else |
| { |
| rgbQuads[i].rgbRed = palEntry->peRed; |
| rgbQuads[i].rgbGreen = palEntry->peGreen; |
| rgbQuads[i].rgbBlue = palEntry->peBlue; |
| rgbQuads[i].rgbReserved = 0; |
| } |
| } |
| else ((WORD *)colorPtr)[i] = (WORD)i; |
| } |
| GDI_ReleaseObj( dc->hPalette ); |
| } else { |
| switch (bpp) { |
| case 1: |
| if (core_header) |
| { |
| rgbTriples[0].rgbtRed = rgbTriples[0].rgbtGreen = |
| rgbTriples[0].rgbtBlue = 0; |
| rgbTriples[1].rgbtRed = rgbTriples[1].rgbtGreen = |
| rgbTriples[1].rgbtBlue = 0xff; |
| } |
| else |
| { |
| rgbQuads[0].rgbRed = rgbQuads[0].rgbGreen = |
| rgbQuads[0].rgbBlue = 0; |
| rgbQuads[0].rgbReserved = 0; |
| rgbQuads[1].rgbRed = rgbQuads[1].rgbGreen = |
| rgbQuads[1].rgbBlue = 0xff; |
| rgbQuads[1].rgbReserved = 0; |
| } |
| break; |
| |
| case 4: |
| if (core_header) |
| memcpy(colorPtr, EGAColorsTriples, sizeof(EGAColorsTriples)); |
| else |
| memcpy(colorPtr, EGAColorsQuads, sizeof(EGAColorsQuads)); |
| |
| break; |
| |
| case 8: |
| { |
| if (core_header) |
| { |
| INT r, g, b; |
| RGBTRIPLE *color; |
| |
| memcpy(rgbTriples, DefLogPaletteTriples, |
| 10 * sizeof(RGBTRIPLE)); |
| memcpy(rgbTriples + 246, DefLogPaletteTriples + 10, |
| 10 * sizeof(RGBTRIPLE)); |
| color = rgbTriples + 10; |
| for(r = 0; r <= 5; r++) /* FIXME */ |
| for(g = 0; g <= 5; g++) |
| for(b = 0; b <= 5; b++) { |
| color->rgbtRed = (r * 0xff) / 5; |
| color->rgbtGreen = (g * 0xff) / 5; |
| color->rgbtBlue = (b * 0xff) / 5; |
| color++; |
| } |
| } |
| else |
| { |
| INT r, g, b; |
| RGBQUAD *color; |
| |
| memcpy(rgbQuads, DefLogPaletteQuads, |
| 10 * sizeof(RGBQUAD)); |
| memcpy(rgbQuads + 246, DefLogPaletteQuads + 10, |
| 10 * sizeof(RGBQUAD)); |
| color = rgbQuads + 10; |
| for(r = 0; r <= 5; r++) /* FIXME */ |
| for(g = 0; g <= 5; g++) |
| for(b = 0; b <= 5; b++) { |
| color->rgbRed = (r * 0xff) / 5; |
| color->rgbGreen = (g * 0xff) / 5; |
| color->rgbBlue = (b * 0xff) / 5; |
| color->rgbReserved = 0; |
| color++; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| if (bits && lines) |
| { |
| /* If the bitmap object already have a dib section that contains image data, get the bits from it */ |
| if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && bpp >= 15) |
| { |
| /*FIXME: Only RGB dibs supported for now */ |
| unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes; |
| unsigned int dstwidth = width; |
| int dstwidthb = DIB_GetDIBWidthBytes( width, bpp ); |
| LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb); |
| unsigned int x, y, width, widthb; |
| |
| if ((height < 0) ^ (bmp->dib->dsBmih.biHeight < 0)) |
| { |
| dbits = (LPBYTE)bits + (dstwidthb * (lines-1)); |
| dstwidthb = -dstwidthb; |
| } |
| |
| switch( bpp ) { |
| |
| case 15: |
| case 16: /* 16 bpp dstDIB */ |
| { |
| LPWORD dstbits = (LPWORD)dbits; |
| WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f; |
| |
| /* FIXME: BI_BITFIELDS not supported yet */ |
| |
| switch(bmp->dib->dsBm.bmBitsPixel) { |
| |
| case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */ |
| { |
| widthb = min(srcwidthb, abs(dstwidthb)); |
| /* FIXME: BI_BITFIELDS not supported yet */ |
| for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) |
| memcpy(dbits, sbits, widthb); |
| } |
| break; |
| |
| case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */ |
| { |
| LPBYTE srcbits = sbits; |
| |
| width = min(srcwidth, dstwidth); |
| for( y = 0; y < lines; y++) { |
| for( x = 0; x < width; x++, srcbits += 3) |
| *dstbits++ = ((srcbits[0] >> 3) & bmask) | |
| (((WORD)srcbits[1] << 2) & gmask) | |
| (((WORD)srcbits[2] << 7) & rmask); |
| |
| dstbits = (LPWORD)(dbits+=dstwidthb); |
| srcbits = (sbits += srcwidthb); |
| } |
| } |
| break; |
| |
| case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */ |
| { |
| LPDWORD srcbits = (LPDWORD)sbits; |
| DWORD val; |
| |
| width = min(srcwidth, dstwidth); |
| for( y = 0; y < lines; y++) { |
| for( x = 0; x < width; x++ ) { |
| val = *srcbits++; |
| *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) | |
| ((val >> 9) & rmask)); |
| } |
| dstbits = (LPWORD)(dbits+=dstwidthb); |
| srcbits = (LPDWORD)(sbits+=srcwidthb); |
| } |
| } |
| break; |
| |
| default: /* ? bit bmp -> 16 bit DIB */ |
| FIXME("15/16 bit DIB %d bit bitmap\n", |
| bmp->bitmap.bmBitsPixel); |
| break; |
| } |
| } |
| break; |
| |
| case 24: /* 24 bpp dstDIB */ |
| { |
| LPBYTE dstbits = dbits; |
| |
| switch(bmp->dib->dsBm.bmBitsPixel) { |
| |
| case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */ |
| { |
| LPWORD srcbits = (LPWORD)sbits; |
| WORD val; |
| |
| width = min(srcwidth, dstwidth); |
| /* FIXME: BI_BITFIELDS not supported yet */ |
| for( y = 0; y < lines; y++) { |
| for( x = 0; x < width; x++ ) { |
| val = *srcbits++; |
| *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07)); |
| *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07)); |
| *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07)); |
| } |
| dstbits = (LPBYTE)(dbits+=dstwidthb); |
| srcbits = (LPWORD)(sbits+=srcwidthb); |
| } |
| } |
| break; |
| |
| case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */ |
| { |
| widthb = min(srcwidthb, abs(dstwidthb)); |
| for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) |
| memcpy(dbits, sbits, widthb); |
| } |
| break; |
| |
| case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */ |
| { |
| LPBYTE srcbits = (LPBYTE)sbits; |
| |
| width = min(srcwidth, dstwidth); |
| for( y = 0; y < lines; y++) { |
| for( x = 0; x < width; x++, srcbits++ ) { |
| *dstbits++ = *srcbits++; |
| *dstbits++ = *srcbits++; |
| *dstbits++ = *srcbits++; |
| } |
| dstbits=(LPBYTE)(dbits+=dstwidthb); |
| srcbits = (LPBYTE)(sbits+=srcwidthb); |
| } |
| } |
| break; |
| |
| default: /* ? bit bmp -> 24 bit DIB */ |
| FIXME("24 bit DIB %d bit bitmap\n", |
| bmp->bitmap.bmBitsPixel); |
| break; |
| } |
| } |
| break; |
| |
| case 32: /* 32 bpp dstDIB */ |
| { |
| LPDWORD dstbits = (LPDWORD)dbits; |
| |
| /* FIXME: BI_BITFIELDS not supported yet */ |
| |
| switch(bmp->dib->dsBm.bmBitsPixel) { |
| case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */ |
| { |
| LPWORD srcbits = (LPWORD)sbits; |
| DWORD val; |
| |
| width = min(srcwidth, dstwidth); |
| /* FIXME: BI_BITFIELDS not supported yet */ |
| for( y = 0; y < lines; y++) { |
| for( x = 0; x < width; x++ ) { |
| val = (DWORD)*srcbits++; |
| *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) | |
| ((val << 6) & 0xf800) | ((val << 1) & 0x0700) | |
| ((val << 9) & 0xf80000) | ((val << 4) & 0x070000); |
| } |
| dstbits=(LPDWORD)(dbits+=dstwidthb); |
| srcbits=(LPWORD)(sbits+=srcwidthb); |
| } |
| } |
| break; |
| |
| case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */ |
| { |
| LPBYTE srcbits = sbits; |
| |
| width = min(srcwidth, dstwidth); |
| for( y = 0; y < lines; y++) { |
| for( x = 0; x < width; x++, srcbits+=3 ) |
| *dstbits++ = srcbits[0] | |
| (srcbits[1] << 8) | |
| (srcbits[2] << 16); |
| dstbits=(LPDWORD)(dbits+=dstwidthb); |
| srcbits=(sbits+=srcwidthb); |
| } |
| } |
| break; |
| |
| case 32: /* 32 bpp srcDIB -> 32 bpp dstDIB */ |
| { |
| widthb = min(srcwidthb, abs(dstwidthb)); |
| /* FIXME: BI_BITFIELDS not supported yet */ |
| for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) { |
| memcpy(dbits, sbits, widthb); |
| } |
| } |
| break; |
| |
| default: /* ? bit bmp -> 32 bit DIB */ |
| FIXME("32 bit DIB %d bit bitmap\n", |
| bmp->bitmap.bmBitsPixel); |
| break; |
| } |
| } |
| break; |
| |
| default: /* ? bit DIB */ |
| FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount); |
| break; |
| } |
| } |
| /* Otherwise, get bits from the XImage */ |
| else |
| { |
| if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0; |
| else |
| { |
| if (bmp->funcs && bmp->funcs->pGetDIBits) |
| lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan, |
| lines, bits, info, coloruse ); |
| else |
| lines = 0; /* FIXME: should copy from bmp->bitmap.bmBits */ |
| } |
| } |
| } |
| else |
| { |
| /* fill in struct members */ |
| |
| if (bpp == 0) |
| { |
| if (core_header) |
| { |
| BITMAPCOREHEADER* coreheader = (BITMAPCOREHEADER*) info; |
| coreheader->bcWidth = bmp->bitmap.bmWidth; |
| coreheader->bcHeight = bmp->bitmap.bmHeight; |
| coreheader->bcPlanes = 1; |
| coreheader->bcBitCount = bmp->bitmap.bmBitsPixel; |
| } |
| else |
| { |
| info->bmiHeader.biWidth = bmp->bitmap.bmWidth; |
| info->bmiHeader.biHeight = bmp->bitmap.bmHeight; |
| info->bmiHeader.biPlanes = 1; |
| info->bmiHeader.biSizeImage = |
| DIB_GetDIBImageBytes( bmp->bitmap.bmWidth, |
| bmp->bitmap.bmHeight, |
| bmp->bitmap.bmBitsPixel ); |
| switch(bmp->bitmap.bmBitsPixel) |
| { |
| case 15: |
| info->bmiHeader.biBitCount = 16; |
| info->bmiHeader.biCompression = BI_RGB; |
| break; |
| |
| case 16: |
| info->bmiHeader.biBitCount = 16; |
| info->bmiHeader.biCompression = BI_BITFIELDS; |
| ((PDWORD)info->bmiColors)[0] = 0xf800; |
| ((PDWORD)info->bmiColors)[1] = 0x07e0; |
| ((PDWORD)info->bmiColors)[2] = 0x001f; |
| break; |
| |
| default: |
| info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel; |
| info->bmiHeader.biCompression = BI_RGB; |
| break; |
| } |
| info->bmiHeader.biXPelsPerMeter = 0; |
| info->bmiHeader.biYPelsPerMeter = 0; |
| info->bmiHeader.biClrUsed = 0; |
| info->bmiHeader.biClrImportant = 0; |
| |
| /* Windows 2000 doesn't touch the additional struct members if |
| it's a BITMAPV4HEADER or a BITMAPV5HEADER */ |
| } |
| lines = abs(bmp->bitmap.bmHeight); |
| } |
| else |
| { |
| /* The knowledge base article Q81498 ("DIBs and Their Uses") states that |
| if bits == NULL and bpp != 0, only biSizeImage and the color table are |
| filled in. */ |
| if (!core_header) |
| { |
| /* FIXME: biSizeImage should be calculated according to the selected |
| compression algorithm if biCompression != BI_RGB */ |
| info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes( width, height, bpp ); |
| } |
| lines = abs(height); |
| } |
| } |
| |
| if (!core_header) |
| { |
| TRACE("biSizeImage = %ld, ", info->bmiHeader.biSizeImage); |
| } |
| TRACE("biWidth = %ld, biHeight = %ld\n", width, height); |
| |
| GDI_ReleaseObj( hdc ); |
| GDI_ReleaseObj( hbitmap ); |
| DeleteDC(memdc); |
| return lines; |
| } |
| |
| |
| /*********************************************************************** |
| * CreateDIBitmap (GDI32.@) |
| * |
| * Creates a DDB (device dependent bitmap) from a DIB. |
| * The DDB will have the same color depth as the reference DC. |
| */ |
| HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header, |
| DWORD init, LPCVOID bits, const BITMAPINFO *data, |
| UINT coloruse ) |
| { |
| HBITMAP handle; |
| LONG width; |
| LONG height; |
| WORD planes, bpp; |
| DWORD compr, size; |
| DC *dc; |
| |
| if (DIB_GetBitmapInfo( header, &width, &height, &planes, &bpp, &compr, &size ) == -1) return 0; |
| |
| if (width < 0) |
| { |
| TRACE("Bitmap has a negative width\n"); |
| return 0; |
| } |
| |
| /* Top-down DIBs have a negative height */ |
| if (height < 0) height = -height; |
| |
| TRACE("hdc=%p, header=%p, init=%lu, bits=%p, data=%p, coloruse=%u (bitmap: width=%ld, height=%ld, bpp=%u, compr=%lu)\n", |
| hdc, header, init, bits, data, coloruse, width, height, bpp, compr); |
| |
| if (hdc == NULL) |
| handle = CreateBitmap( width, height, 1, 1, NULL ); |
| else |
| handle = CreateCompatibleBitmap( hdc, width, height ); |
| |
| if (handle) |
| { |
| if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse ); |
| |
| else if (hdc && ((dc = DC_GetDCPtr( hdc )) != NULL) ) |
| { |
| if (!BITMAP_SetOwnerDC( handle, dc )) |
| { |
| DeleteObject( handle ); |
| handle = 0; |
| } |
| GDI_ReleaseObj( hdc ); |
| } |
| } |
| |
| return handle; |
| } |
| |
| /*********************************************************************** |
| * CreateDIBSection (GDI.489) |
| */ |
| HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, const BITMAPINFO *bmi, UINT16 usage, |
| SEGPTR *bits16, HANDLE section, DWORD offset) |
| { |
| LPVOID bits32; |
| HBITMAP hbitmap; |
| |
| hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset ); |
| if (hbitmap) |
| { |
| BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC); |
| if (bmp && bmp->dib && bits32) |
| { |
| const BITMAPINFOHEADER *bi = &bmi->bmiHeader; |
| LONG width, height; |
| WORD planes, bpp; |
| DWORD compr, size; |
| INT width_bytes; |
| WORD count, sel; |
| int i; |
| |
| DIB_GetBitmapInfo(bi, &width, &height, &planes, &bpp, &compr, &size); |
| |
| height = height >= 0 ? height : -height; |
| width_bytes = DIB_GetDIBWidthBytes(width, bpp); |
| |
| if (!size || (compr != BI_RLE4 && compr != BI_RLE8)) size = width_bytes * height; |
| |
| /* calculate number of sel's needed for size with 64K steps */ |
| count = (size + 0xffff) / 0x10000; |
| sel = AllocSelectorArray16(count); |
| |
| for (i = 0; i < count; i++) |
| { |
| SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000); |
| SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */ |
| size -= 0x10000; |
| } |
| bmp->segptr_bits = MAKESEGPTR( sel, 0 ); |
| if (bits16) *bits16 = bmp->segptr_bits; |
| } |
| if (bmp) GDI_ReleaseObj( hbitmap ); |
| } |
| return HBITMAP_16(hbitmap); |
| } |
| |
| /*********************************************************************** |
| * CreateDIBSection (GDI32.@) |
| */ |
| HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage, |
| VOID **bits, HANDLE section, DWORD offset) |
| { |
| HBITMAP ret = 0; |
| DC *dc; |
| BOOL bDesktopDC = FALSE; |
| DIBSECTION *dib; |
| BITMAPOBJ *bmp; |
| int bitmap_type; |
| LONG width, height; |
| WORD planes, bpp; |
| DWORD compression, sizeImage; |
| void *mapBits = NULL; |
| |
| if (((bitmap_type = DIB_GetBitmapInfo( &bmi->bmiHeader, &width, &height, |
| &planes, &bpp, &compression, &sizeImage )) == -1)) |
| return 0; |
| |
| if (compression != BI_RGB && compression != BI_BITFIELDS) |
| { |
| TRACE("can't create a compressed (%lu) dibsection\n", compression); |
| return 0; |
| } |
| |
| if (!(dib = HeapAlloc( GetProcessHeap(), 0, sizeof(*dib) ))) return 0; |
| |
| TRACE("format (%ld,%ld), planes %d, bpp %d, size %ld, %s\n", |
| width, height, planes, bpp, sizeImage, usage == DIB_PAL_COLORS? "PAL" : "RGB"); |
| |
| dib->dsBm.bmType = 0; |
| dib->dsBm.bmWidth = width; |
| dib->dsBm.bmHeight = height >= 0 ? height : -height; |
| dib->dsBm.bmWidthBytes = DIB_GetDIBWidthBytes(width, bpp); |
| dib->dsBm.bmPlanes = planes; |
| dib->dsBm.bmBitsPixel = bpp; |
| dib->dsBm.bmBits = NULL; |
| |
| if (!bitmap_type) /* core header */ |
| { |
| /* convert the BITMAPCOREHEADER to a BITMAPINFOHEADER */ |
| dib->dsBmih.biSize = sizeof(BITMAPINFOHEADER); |
| dib->dsBmih.biWidth = width; |
| dib->dsBmih.biHeight = height; |
| dib->dsBmih.biPlanes = planes; |
| dib->dsBmih.biBitCount = bpp; |
| dib->dsBmih.biCompression = compression; |
| dib->dsBmih.biXPelsPerMeter = 0; |
| dib->dsBmih.biYPelsPerMeter = 0; |
| dib->dsBmih.biClrUsed = 0; |
| dib->dsBmih.biClrImportant = 0; |
| } |
| else |
| { |
| /* truncate extended bitmap headers (BITMAPV4HEADER etc.) */ |
| dib->dsBmih = bmi->bmiHeader; |
| dib->dsBmih.biSize = sizeof(BITMAPINFOHEADER); |
| } |
| |
| /* set number of entries in bmi.bmiColors table */ |
| if( bpp <= 8 ) |
| dib->dsBmih.biClrUsed = 1 << bpp; |
| |
| dib->dsBmih.biSizeImage = dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight; |
| |
| /* set dsBitfields values */ |
| if (usage == DIB_PAL_COLORS || bpp <= 8) |
| { |
| dib->dsBitfields[0] = dib->dsBitfields[1] = dib->dsBitfields[2] = 0; |
| } |
| else switch( bpp ) |
| { |
| case 15: |
| case 16: |
| dib->dsBitfields[0] = (compression == BI_BITFIELDS) ? *(const DWORD *)bmi->bmiColors : 0x7c00; |
| dib->dsBitfields[1] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 1) : 0x03e0; |
| dib->dsBitfields[2] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 2) : 0x001f; |
| break; |
| case 24: |
| case 32: |
| dib->dsBitfields[0] = (compression == BI_BITFIELDS) ? *(const DWORD *)bmi->bmiColors : 0xff0000; |
| dib->dsBitfields[1] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 1) : 0x00ff00; |
| dib->dsBitfields[2] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 2) : 0x0000ff; |
| break; |
| } |
| |
| /* get storage location for DIB bits */ |
| |
| if (section) |
| { |
| SYSTEM_INFO SystemInfo; |
| DWORD mapOffset; |
| INT mapSize; |
| |
| GetSystemInfo( &SystemInfo ); |
| mapOffset = offset - (offset % SystemInfo.dwAllocationGranularity); |
| mapSize = dib->dsBmih.biSizeImage + (offset - mapOffset); |
| mapBits = MapViewOfFile( section, FILE_MAP_ALL_ACCESS, 0, mapOffset, mapSize ); |
| if (mapBits) dib->dsBm.bmBits = (char *)mapBits + (offset - mapOffset); |
| } |
| else |
| { |
| offset = 0; |
| dib->dsBm.bmBits = VirtualAlloc( NULL, dib->dsBmih.biSizeImage, |
| MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE ); |
| } |
| dib->dshSection = section; |
| dib->dsOffset = offset; |
| |
| if (!dib->dsBm.bmBits) |
| { |
| HeapFree( GetProcessHeap(), 0, dib ); |
| return 0; |
| } |
| |
| /* If the reference hdc is null, take the desktop dc */ |
| if (hdc == 0) |
| { |
| hdc = CreateCompatibleDC(0); |
| bDesktopDC = TRUE; |
| } |
| |
| if (!(dc = DC_GetDCPtr( hdc ))) goto error; |
| |
| /* create Device Dependent Bitmap and add DIB pointer */ |
| ret = CreateBitmap( dib->dsBm.bmWidth, dib->dsBm.bmHeight, 1, |
| (bpp == 1) ? 1 : GetDeviceCaps(hdc, BITSPIXEL), NULL ); |
| |
| if (ret && ((bmp = GDI_GetObjPtr(ret, BITMAP_MAGIC)))) |
| { |
| bmp->dib = dib; |
| bmp->funcs = dc->funcs; |
| GDI_ReleaseObj( ret ); |
| |
| if (dc->funcs->pCreateDIBSection) |
| { |
| if (!dc->funcs->pCreateDIBSection(dc->physDev, ret, bmi, usage)) |
| { |
| DeleteObject( ret ); |
| ret = 0; |
| } |
| } |
| } |
| |
| GDI_ReleaseObj(hdc); |
| if (bDesktopDC) DeleteDC( hdc ); |
| if (ret && bits) *bits = dib->dsBm.bmBits; |
| return ret; |
| |
| error: |
| if (bDesktopDC) DeleteDC( hdc ); |
| if (section) UnmapViewOfFile( mapBits ); |
| else if (!offset) VirtualFree( dib->dsBm.bmBits, 0, MEM_RELEASE ); |
| HeapFree( GetProcessHeap(), 0, dib ); |
| return 0; |
| } |
