/* * 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 #include #include #include "windef.h" #include "winbase.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. */ 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 ); } /*********************************************************************** * bitmap_info_size * * Return the size of the bitmap info structure including color table. */ int bitmap_info_size( const BITMAPINFO * info, WORD coloruse ) { unsigned int colors, size, masks = 0; if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER)) { const BITMAPCOREHEADER *core = (const 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; if (info->bmiHeader.biCompression == BI_BITFIELDS) masks = 3; size = max( info->bmiHeader.biSize, sizeof(BITMAPINFOHEADER) + masks * sizeof(DWORD) ); return size + colors * ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD)); } } /*********************************************************************** * DIB_GetBitmapInfo * * Get the info from a bitmap header. * Return 0 for COREHEADER, 1 for INFOHEADER, -1 for error. */ int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, LONG *width, LONG *height, WORD *planes, WORD *bpp, DWORD *compr, DWORD *size ) { if (header->biSize == sizeof(BITMAPCOREHEADER)) { const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)header; *width = core->bcWidth; *height = core->bcHeight; *planes = core->bcPlanes; *bpp = core->bcBitCount; *compr = 0; *size = 0; return 0; } if (header->biSize >= sizeof(BITMAPINFOHEADER)) /* assume BITMAPINFOHEADER */ { *width = header->biWidth; *height = header->biHeight; *planes = header->biPlanes; *bpp = header->biBitCount; *compr = header->biCompression; *size = header->biSizeImage; return 1; } ERR("(%d): unknown/wrong size for header\n", header->biSize ); return -1; } /* nulldrv fallback implementation using SetDIBits/StretchBlt */ INT CDECL nulldrv_StretchDIBits( PHYSDEV dev, INT xDst, INT yDst, INT widthDst, INT heightDst, INT xSrc, INT ySrc, INT widthSrc, INT heightSrc, const void *bits, const BITMAPINFO *info, UINT coloruse, DWORD rop ) { DC *dc = get_nulldrv_dc( dev ); INT ret; LONG width, height; WORD planes, bpp; DWORD compr, size; HBITMAP hBitmap; HDC hdcMem; /* make sure we have a real implementation for StretchBlt and SetDIBits */ if (GET_DC_PHYSDEV( dc, pStretchBlt ) == dev || GET_DC_PHYSDEV( dc, pSetDIBits ) == dev) return 0; if (DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size ) == -1) return 0; if (width < 0) return 0; if (xSrc == 0 && ySrc == 0 && widthDst == widthSrc && heightDst == heightSrc && info->bmiHeader.biCompression == BI_RGB) { /* Windows appears to have a fast case optimization * that uses the wrong origin for top-down DIBs */ if (height < 0 && heightSrc < abs(height)) ySrc = abs(height) - heightSrc; if (xDst == 0 && yDst == 0 && info->bmiHeader.biCompression == BI_RGB && rop == SRCCOPY) { BITMAP bm; hBitmap = GetCurrentObject( dev->hdc, OBJ_BITMAP ); if (GetObjectW( hBitmap, sizeof(bm), &bm ) && bm.bmWidth == widthSrc && bm.bmHeight == heightSrc && bm.bmBitsPixel == bpp && bm.bmPlanes == planes) { /* fast path */ return SetDIBits( dev->hdc, hBitmap, 0, height, bits, info, coloruse ); } } } hdcMem = CreateCompatibleDC( dev->hdc ); hBitmap = CreateCompatibleBitmap( dev->hdc, width, height ); SelectObject( hdcMem, hBitmap ); if (coloruse == DIB_PAL_COLORS) SelectPalette( hdcMem, GetCurrentObject( dev->hdc, OBJ_PAL ), 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 */ StretchBlt( hdcMem, xSrc, abs(height) - heightSrc - ySrc, widthSrc, heightSrc, dev->hdc, xDst, yDst, widthDst, heightDst, rop ); } ret = SetDIBits( hdcMem, hBitmap, 0, height, bits, info, coloruse ); if (ret) StretchBlt( dev->hdc, xDst, yDst, widthDst, heightDst, hdcMem, xSrc, abs(height) - heightSrc - ySrc, widthSrc, heightSrc, rop ); DeleteDC( hdcMem ); DeleteObject( hBitmap ); return ret; } /*********************************************************************** * 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 coloruse, DWORD rop ) { DC *dc; INT ret = 0; if (!bits || !info) return 0; if ((dc = get_dc_ptr( hdc ))) { PHYSDEV physdev = GET_DC_PHYSDEV( dc, pStretchDIBits ); update_dc( dc ); ret = physdev->funcs->pStretchDIBits( physdev, xDst, yDst, widthDst, heightDst, xSrc, ySrc, widthSrc, heightSrc, bits, info, coloruse, rop ); release_dc_ptr( dc ); } return ret; } /****************************************************************************** * 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 = get_dc_ptr( hdc ); BOOL delete_hdc = FALSE; PHYSDEV physdev; BITMAPOBJ *bitmap; INT result = 0; if (coloruse == DIB_RGB_COLORS && !dc) { hdc = CreateCompatibleDC(0); dc = get_dc_ptr( hdc ); delete_hdc = TRUE; } if (!dc) return 0; update_dc( dc ); if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) { release_dc_ptr( dc ); if (delete_hdc) DeleteDC(hdc); return 0; } physdev = GET_DC_PHYSDEV( dc, pSetDIBits ); if (BITMAP_SetOwnerDC( hbitmap, physdev )) result = physdev->funcs->pSetDIBits( physdev, hbitmap, startscan, lines, bits, info, coloruse ); GDI_ReleaseObj( hbitmap ); release_dc_ptr( dc ); if (delete_hdc) DeleteDC(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 = 0; DC *dc; if (!bits) return 0; if ((dc = get_dc_ptr( hdc ))) { PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDIBitsToDevice ); update_dc( dc ); ret = physdev->funcs->pSetDIBitsToDevice( physdev, xDest, yDest, cx, cy, xSrc, ySrc, startscan, lines, bits, info, coloruse ); release_dc_ptr( dc ); } return ret; } /*********************************************************************** * SetDIBColorTable (GDI32.@) */ UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, CONST RGBQUAD *colors ) { DC * dc; UINT result = 0; BITMAPOBJ * bitmap; if (!(dc = get_dc_ptr( hdc ))) return 0; if ((bitmap = GDI_GetObjPtr( dc->hBitmap, OBJ_BITMAP ))) { PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDIBColorTable ); /* Check if currently selected bitmap is a DIB */ if (bitmap->color_table) { if (startpos < bitmap->nb_colors) { if (startpos + entries > bitmap->nb_colors) entries = bitmap->nb_colors - startpos; memcpy(bitmap->color_table + startpos, colors, entries * sizeof(RGBQUAD)); result = entries; } } GDI_ReleaseObj( dc->hBitmap ); physdev->funcs->pSetDIBColorTable( physdev, startpos, entries, colors ); } release_dc_ptr( dc ); return result; } /*********************************************************************** * GetDIBColorTable (GDI32.@) */ UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors ) { DC * dc; BITMAPOBJ *bitmap; UINT result = 0; if (!(dc = get_dc_ptr( hdc ))) return 0; if ((bitmap = GDI_GetObjPtr( dc->hBitmap, OBJ_BITMAP ))) { /* Check if currently selected bitmap is a DIB */ if (bitmap->color_table) { if (startpos < bitmap->nb_colors) { if (startpos + entries > bitmap->nb_colors) entries = bitmap->nb_colors - startpos; memcpy(colors, bitmap->color_table + startpos, entries * sizeof(RGBQUAD)); result = entries; } } GDI_ReleaseObj( dc->hBitmap ); } release_dc_ptr( dc ); return result; } 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, 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 } }; /****************************************************************************** * GetDIBits [GDI32.@] * * Retrieves bits of bitmap and copies to buffer. * * RETURNS * Success: Number of scan lines copied from bitmap * Failure: 0 */ 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; int bitmap_type; BOOL core_header; LONG width; LONG height; WORD planes, bpp; DWORD compr, size; void* colorPtr; RGBQUAD quad_buf[256]; RGBQUAD* rgbQuads = quad_buf; 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); if (!(dc = get_dc_ptr( hdc ))) { SetLastError( ERROR_INVALID_PARAMETER ); return 0; } update_dc( dc ); if (!(bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) { release_dc_ptr( dc ); return 0; } colorPtr = (LPBYTE) info + (WORD) info->bmiHeader.biSize; if(!core_header) rgbQuads = colorPtr; /* Transfer color info */ switch (bpp) { case 0: /* query bitmap info only */ 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 ); if (bmp->dib) { info->bmiHeader.biBitCount = bmp->dib->dsBm.bmBitsPixel; switch (bmp->dib->dsBm.bmBitsPixel) { case 16: case 32: info->bmiHeader.biCompression = BI_BITFIELDS; break; default: info->bmiHeader.biCompression = BI_RGB; break; } } else { info->bmiHeader.biCompression = (bmp->bitmap.bmBitsPixel > 8) ? BI_BITFIELDS : BI_RGB; info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel; } 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); goto done; case 1: case 4: case 8: { unsigned int colors = 1 << bpp; if (!core_header) info->bmiHeader.biClrUsed = 0; if (coloruse == DIB_PAL_COLORS) { WORD *index = colorPtr; for (i = 0; i < colors; i++, index++) *index = i; break; } /* 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) { colors = min( colors, bmp->nb_colors ); if (!core_header && colors != 1 << bpp) info->bmiHeader.biClrUsed = colors; memcpy(rgbQuads, bmp->color_table, colors * sizeof(RGBQUAD)); } /* For color DDBs in native depth (mono DDBs always have a black/white palette): Generate the color map from the selected palette */ else if (bpp > 1 && bpp == bmp->bitmap.bmBitsPixel) { PALETTEENTRY palEntry[256]; memset( palEntry, 0, sizeof(palEntry) ); if (!GetPaletteEntries( dc->hPalette, 0, colors, palEntry )) { release_dc_ptr( dc ); GDI_ReleaseObj( hbitmap ); return 0; } for (i = 0; i < colors; i++) { rgbQuads[i].rgbRed = palEntry[i].peRed; rgbQuads[i].rgbGreen = palEntry[i].peGreen; rgbQuads[i].rgbBlue = palEntry[i].peBlue; rgbQuads[i].rgbReserved = 0; } } else { switch (bpp) { case 1: 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: /* The EGA palette is the first and last 8 colours of the default palette with the innermost pair swapped */ memcpy(rgbQuads, DefLogPaletteQuads, 7 * sizeof(RGBQUAD)); memcpy(rgbQuads + 7, DefLogPaletteQuads + 12, 1 * sizeof(RGBQUAD)); memcpy(rgbQuads + 8, DefLogPaletteQuads + 7, 1 * sizeof(RGBQUAD)); memcpy(rgbQuads + 9, DefLogPaletteQuads + 13, 7 * sizeof(RGBQUAD)); break; case 8: memcpy(rgbQuads, DefLogPaletteQuads, 10 * sizeof(RGBQUAD)); memcpy(rgbQuads + 246, DefLogPaletteQuads + 10, 10 * sizeof(RGBQUAD)); for (i = 10; i < 246; i++) { rgbQuads[i].rgbRed = (i & 0x07) << 5; rgbQuads[i].rgbGreen = (i & 0x38) << 2; rgbQuads[i].rgbBlue = i & 0xc0; rgbQuads[i].rgbReserved = 0; } } } if(core_header) { RGBTRIPLE *triple = (RGBTRIPLE *)colorPtr; for (i = 0; i < colors; i++) { triple[i].rgbtRed = rgbQuads[i].rgbRed; triple[i].rgbtGreen = rgbQuads[i].rgbGreen; triple[i].rgbtBlue = rgbQuads[i].rgbBlue; } } break; } case 15: if (info->bmiHeader.biCompression == BI_BITFIELDS) { ((PDWORD)info->bmiColors)[0] = 0x7c00; ((PDWORD)info->bmiColors)[1] = 0x03e0; ((PDWORD)info->bmiColors)[2] = 0x001f; } break; case 16: if (info->bmiHeader.biCompression == BI_BITFIELDS) { if (bmp->dib) { if (bmp->dib->dsBmih.biCompression == BI_BITFIELDS) memcpy( info->bmiColors, bmp->dib->dsBitfields, 3 * sizeof(DWORD) ); else { ((PDWORD)info->bmiColors)[0] = 0x7c00; ((PDWORD)info->bmiColors)[1] = 0x03e0; ((PDWORD)info->bmiColors)[2] = 0x001f; } } else { ((PDWORD)info->bmiColors)[0] = 0xf800; ((PDWORD)info->bmiColors)[1] = 0x07e0; ((PDWORD)info->bmiColors)[2] = 0x001f; } } break; case 24: case 32: if (info->bmiHeader.biCompression == BI_BITFIELDS) { if (bmp->dib && bmp->dib->dsBmih.biCompression == BI_BITFIELDS) memcpy( info->bmiColors, bmp->dib->dsBitfields, 3 * sizeof(DWORD) ); else { ((PDWORD)info->bmiColors)[0] = 0xff0000; ((PDWORD)info->bmiColors)[1] = 0x00ff00; ((PDWORD)info->bmiColors)[2] = 0x0000ff; } } break; } 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; int 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 copying from a top-down source bitmap, move the source * pointer to the end of the source bitmap and negate the width * so that we copy the bits upside-down. */ if (bmp->dib->dsBmih.biHeight < 0) { sbits += (srcwidthb * (int)(abs(bmp->dib->dsBmih.biHeight) - 2 * startscan - 1)); srcwidthb = -srcwidthb; } /*Same for the destination.*/ if (height < 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(abs(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 = dbits+=dstwidthb; srcbits = (LPWORD)(sbits+=srcwidthb); } } break; case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */ { widthb = min(abs(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 = 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 = dbits+=dstwidthb; srcbits = 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(abs(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 { PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDIBits ); if (!BITMAP_SetOwnerDC( hbitmap, physdev )) lines = 0; else lines = physdev->funcs->pGetDIBits( physdev, hbitmap, startscan, lines, bits, info, coloruse ); } } else lines = abs(height); /* 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 ); TRACE("biSizeImage = %d, ", info->bmiHeader.biSizeImage); } TRACE("biWidth = %d, biHeight = %d\n", width, height); done: release_dc_ptr( dc ); GDI_ReleaseObj( hbitmap ); 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; if (!header) return 0; 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=%u, bits=%p, data=%p, coloruse=%u (bitmap: width=%d, height=%d, bpp=%u, compr=%u)\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) { if (SetDIBits( hdc, handle, 0, height, bits, data, coloruse ) == 0) { DeleteObject( handle ); handle = 0; } } } return handle; } /* Copy/synthesize RGB palette from BITMAPINFO. Ripped from dlls/winex11.drv/dib.c */ static void DIB_CopyColorTable( DC *dc, BITMAPOBJ *bmp, WORD coloruse, const BITMAPINFO *info ) { RGBQUAD *colorTable; unsigned int colors, i; BOOL core_info = info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER); if (core_info) { colors = 1 << ((const BITMAPCOREINFO*) info)->bmciHeader.bcBitCount; } else { colors = info->bmiHeader.biClrUsed; if (!colors) colors = 1 << info->bmiHeader.biBitCount; } if (colors > 256) { ERR("called with >256 colors!\n"); return; } if (!(colorTable = HeapAlloc(GetProcessHeap(), 0, colors * sizeof(RGBQUAD) ))) return; if(coloruse == DIB_RGB_COLORS) { if (core_info) { /* Convert RGBTRIPLEs to RGBQUADs */ for (i=0; i < colors; i++) { colorTable[i].rgbRed = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtRed; colorTable[i].rgbGreen = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtGreen; colorTable[i].rgbBlue = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtBlue; colorTable[i].rgbReserved = 0; } } else { memcpy(colorTable, (const BYTE*) info + (WORD) info->bmiHeader.biSize, colors * sizeof(RGBQUAD)); } } else { PALETTEENTRY entries[256]; const WORD *index = (const WORD*) ((const BYTE*) info + (WORD) info->bmiHeader.biSize); UINT count = GetPaletteEntries( dc->hPalette, 0, colors, entries ); for (i = 0; i < colors; i++, index++) { PALETTEENTRY *entry = &entries[*index % count]; colorTable[i].rgbRed = entry->peRed; colorTable[i].rgbGreen = entry->peGreen; colorTable[i].rgbBlue = entry->peBlue; colorTable[i].rgbReserved = 0; } } bmp->color_table = colorTable; bmp->nb_colors = colors; } /*********************************************************************** * 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(!bmi){ if(bits) *bits = NULL; return NULL; } if (((bitmap_type = DIB_GetBitmapInfo( &bmi->bmiHeader, &width, &height, &planes, &bpp, &compression, &sizeImage )) == -1)) return 0; switch (bpp) { case 16: case 32: if (compression == BI_BITFIELDS) break; /* fall through */ case 1: case 4: case 8: case 24: if (compression == BI_RGB) break; /* fall through */ default: WARN( "invalid %u bpp compression %u\n", bpp, compression ); return 0; } if (!(dib = HeapAlloc( GetProcessHeap(), 0, sizeof(*dib) ))) return 0; TRACE("format (%d,%d), planes %d, bpp %d, %s, size %d %s\n", width, height, planes, bpp, compression == BI_BITFIELDS? "BI_BITFIELDS" : "BI_RGB", 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 */ dib->dsBitfields[0] = dib->dsBitfields[1] = dib->dsBitfields[2] = 0; if((bpp == 15 || bpp == 16) && compression == BI_RGB) { /* In this case Windows changes biCompression to BI_BITFIELDS, however for now we won't do this, as there are a lot of places where BI_BITFIELDS is currently unsupported. */ /* dib->dsBmih.biCompression = compression = BI_BITFIELDS;*/ dib->dsBitfields[0] = 0x7c00; dib->dsBitfields[1] = 0x03e0; dib->dsBitfields[2] = 0x001f; } else if(compression == BI_BITFIELDS) { dib->dsBitfields[0] = *(const DWORD *)bmi->bmiColors; dib->dsBitfields[1] = *((const DWORD *)bmi->bmiColors + 1); dib->dsBitfields[2] = *((const DWORD *)bmi->bmiColors + 2); } /* 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 = get_dc_ptr( 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, OBJ_BITMAP)))) { PHYSDEV physdev = GET_DC_PHYSDEV( dc, pCreateDIBSection ); bmp->dib = dib; bmp->funcs = physdev->funcs; /* create local copy of DIB palette */ if (bpp <= 8) DIB_CopyColorTable( dc, bmp, usage, bmi ); GDI_ReleaseObj( ret ); if (!physdev->funcs->pCreateDIBSection( physdev, ret, bmi, usage )) { DeleteObject( ret ); ret = 0; } } release_dc_ptr( dc ); 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; }