/* * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include "windef.h" #include "winbase.h" #include "bitmap.h" #include "selectors.h" #include "gdi.h" #include "wownt32.h" #include "wine/debug.h" #include "palette.h" WINE_DEFAULT_DEBUG_CHANNEL(bitmap); /*********************************************************************** * DIB_GetDIBWidthBytes * * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned. * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm */ 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 && (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, DWORD *width, int *height, WORD *bpp, WORD *compr ) { if (header->biSize == sizeof(BITMAPINFOHEADER)) { *width = header->biWidth; *height = header->biHeight; *bpp = header->biBitCount; *compr = header->biCompression; return 1; } if (header->biSize == sizeof(BITMAPCOREHEADER)) { BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header; *width = core->bcWidth; *height = core->bcHeight; *bpp = core->bcBitCount; *compr = 0; return 0; } if (header->biSize == sizeof(BITMAPV4HEADER)) { BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header; *width = v4hdr->bV4Width; *height = v4hdr->bV4Height; *bpp = v4hdr->bV4BitCount; *compr = v4hdr->bV4V4Compression; return 4; } if (header->biSize == sizeof(BITMAPV5HEADER)) { BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header; *width = v5hdr->bV5Width; *height = v5hdr->bV5Height; *bpp = v5hdr->bV5BitCount; *compr = v5hdr->bV5Compression; 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; HDC hdcMem; GDI_ReleaseObj( hdc ); hdcMem = CreateCompatibleDC( hdc ); hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth, info->bmiHeader.biHeight); hOldBitmap = SelectObject( hdcMem, hBitmap ); 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(info->bmiHeader.biHeight) - heightSrc - ySrc, widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst, dwRop ); } SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, 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(info->bmiHeader.biHeight) - heightSrc - ySrc, widthSrc, heightSrc, dwRop ); 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 (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0; if (!(dc = DC_GetDCUpdate( hdc ))) { if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" ); GDI_ReleaseObj( hbitmap ); 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( hdc ); GDI_ReleaseObj( hbitmap ); 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, 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 RGBQUAD EGAColors[16] = { /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */ { 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 RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */ /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */ { 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 } }; /****************************************************************************** * GetDIBits [GDI32.@] Retrieves bits of bitmap and copies to buffer * * RETURNS * Success: Number of scan lines copied from bitmap * Failure: 0 * * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm */ 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; if (!info) return 0; if (!(dc = DC_GetDCUpdate( hdc ))) return 0; if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) { GDI_ReleaseObj( hdc ); return 0; } /* Transfer color info */ if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) { 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 == info->bmiHeader.biBitCount) { GetDIBColorTable(hdc, 0, 1 << info->bmiHeader.biBitCount, info->bmiColors); } else { if(info->bmiHeader.biBitCount >= 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 ); return 0; } palEntry = palette->logpalette.palPalEntry; for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) { if (coloruse == DIB_RGB_COLORS) { info->bmiColors[i].rgbRed = palEntry->peRed; info->bmiColors[i].rgbGreen = palEntry->peGreen; info->bmiColors[i].rgbBlue = palEntry->peBlue; info->bmiColors[i].rgbReserved = 0; } else ((WORD *)info->bmiColors)[i] = (WORD)i; } GDI_ReleaseObj( dc->hPalette ); } else { switch (info->bmiHeader.biBitCount) { case 1: info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen = info->bmiColors[0].rgbBlue = 0; info->bmiColors[0].rgbReserved = 0; info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen = info->bmiColors[1].rgbBlue = 0xff; info->bmiColors[1].rgbReserved = 0; break; case 4: memcpy(info->bmiColors, EGAColors, sizeof(EGAColors)); break; case 8: { INT r, g, b; RGBQUAD *color; memcpy(info->bmiColors, DefLogPalette, 10 * sizeof(RGBQUAD)); memcpy(info->bmiColors + 246, DefLogPalette + 10, 10 * sizeof(RGBQUAD)); color = info->bmiColors + 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 && info->bmiHeader.biBitCount >= 15) { /*FIXME: Only RGB dibs supported for now */ unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes; int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount ); LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb); unsigned int x, y; if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0)) { dbits = (LPBYTE)bits + (dstwidthb * (lines-1)); dstwidthb = -dstwidthb; } switch( info->bmiHeader.biBitCount ) { 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 */ { /* FIXME: BI_BITFIELDS not supported yet */ for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) memcpy(dbits, sbits, srcwidthb); } break; case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */ { LPBYTE srcbits = sbits; for( y = 0; y < lines; y++) { for( x = 0; x < srcwidth; 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; for( y = 0; y < lines; y++) { for( x = 0; x < srcwidth; 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; /* FIXME: BI_BITFIELDS not supported yet */ for( y = 0; y < lines; y++) { for( x = 0; x < srcwidth; 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 */ { for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) memcpy(dbits, sbits, srcwidthb); } break; case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */ { LPBYTE srcbits = (LPBYTE)sbits; for( y = 0; y < lines; y++) { for( x = 0; x < srcwidth; 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; /* FIXME: BI_BITFIELDS not supported yet */ for( y = 0; y < lines; y++) { for( x = 0; x < srcwidth; 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; for( y = 0; y < lines; y++) { for( x = 0; x < srcwidth; x++, srcbits+=3 ) *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff; dstbits=(LPDWORD)(dbits+=dstwidthb); srcbits=(sbits+=srcwidthb); } } break; case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */ { /* FIXME: BI_BITFIELDS not supported yet */ for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) memcpy(dbits, sbits, srcwidthb); } 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 if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) ) { /* fill in struct members */ if( info->bmiHeader.biBitCount == 0) { info->bmiHeader.biWidth = bmp->bitmap.bmWidth; info->bmiHeader.biHeight = bmp->bitmap.bmHeight; info->bmiHeader.biPlanes = 1; info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel; info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes( bmp->bitmap.bmWidth, bmp->bitmap.bmHeight, bmp->bitmap.bmBitsPixel ); info->bmiHeader.biCompression = 0; } else { info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes( info->bmiHeader.biWidth, info->bmiHeader.biHeight, info->bmiHeader.biBitCount ); } } TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n", info->bmiHeader.biSizeImage, info->bmiHeader.biWidth, info->bmiHeader.biHeight); GDI_ReleaseObj( hdc ); GDI_ReleaseObj( hbitmap ); return lines; } /*********************************************************************** * CreateDIBitmap (GDI32.@) */ HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header, DWORD init, LPCVOID bits, const BITMAPINFO *data, UINT coloruse ) { HBITMAP handle; BOOL fColor; DWORD width; int height; WORD bpp; WORD compr; DC *dc; if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0; if (height < 0) height = -height; /* Check if we should create a monochrome or color bitmap. */ /* We create a monochrome bitmap only if it has exactly 2 */ /* colors, which are black followed by white, nothing else. */ /* In all other cases, we create a color bitmap. */ if (bpp != 1) fColor = TRUE; else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE; else { if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER)) { RGBQUAD *rgb = data->bmiColors; DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue ); /* Check if the first color of the colormap is black */ if ((col == RGB(0,0,0))) { rgb++; col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue ); /* If the second color is white, create a monochrome bitmap */ fColor = (col != RGB(0xff,0xff,0xff)); } /* Note : If the first color of the colormap is white followed by black, we have to create a color bitmap. If we don't the white will be displayed in black later on!*/ else fColor = TRUE; } else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER)) { RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors; DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue ); if ((col == RGB(0,0,0))) { rgb++; col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue ); fColor = (col != RGB(0xff,0xff,0xff)); } else fColor = TRUE; } else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER)) { /* FIXME: correct ? */ RGBQUAD *rgb = data->bmiColors; DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue ); /* Check if the first color of the colormap is black */ if ((col == RGB(0,0,0))) { rgb++; col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue ); /* If the second color is white, create a monochrome bitmap */ fColor = (col != RGB(0xff,0xff,0xff)); } /* Note : If the first color of the colormap is white followed by black, we have to create a color bitmap. If we don't the white will be displayed in black later on!*/ else fColor = TRUE; } else { ERR("(%ld): wrong/unknown size for data\n", data->bmiHeader.biSize ); return 0; } } /* Now create the bitmap */ if (!(dc = DC_GetDCPtr( hdc ))) return 0; if (fColor) handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ), GetDeviceCaps( hdc, BITSPIXEL ), NULL ); else handle = CreateBitmap( width, height, 1, 1, NULL ); if (handle) { if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse ); else if (!BITMAP_SetOwnerDC( handle, dc )) { DeleteObject( handle ); handle = 0; } } GDI_ReleaseObj( hdc ); return handle; } /*********************************************************************** * CreateDIBSection (GDI.489) */ HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, 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) { BITMAPINFOHEADER *bi = &bmi->bmiHeader; INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight; INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount); INT size = (bi->biSizeImage && bi->biCompression != BI_RGB) ? bi->biSizeImage : width_bytes * height; /* calculate number of sel's needed for size with 64K steps */ WORD count = (size + 0xffff) / 0x10000; WORD sel = AllocSelectorArray16(count); int i; 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); } /*********************************************************************** * DIB_CreateDIBSection */ HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage, LPVOID *bits, HANDLE section, DWORD offset, DWORD ovr_pitch) { HBITMAP hbitmap = 0; DC *dc; BOOL bDesktopDC = FALSE; /* If the reference hdc is null, take the desktop dc */ if (hdc == 0) { hdc = CreateCompatibleDC(0); bDesktopDC = TRUE; } /* Windows ignores the supplied values of biClrUsed and biClrImportant thus: */ if (bmi->bmiHeader.biBitCount >= 1 && bmi->bmiHeader.biBitCount <= 8) bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 1L << bmi->bmiHeader.biBitCount; else bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 0; if ((dc = DC_GetDCPtr( hdc ))) { if(dc->funcs->pCreateDIBSection) hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch); GDI_ReleaseObj(hdc); } if (bDesktopDC) DeleteDC(hdc); return hbitmap; } /*********************************************************************** * CreateDIBSection (GDI32.@) */ HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage, LPVOID *bits, HANDLE section, DWORD offset) { return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0); } /*********************************************************************** * DIB_CreateDIBFromBitmap * Allocates a packed DIB and copies the bitmap data into it. */ HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp) { BITMAPOBJ *pBmp = NULL; HGLOBAL hPackedDIB = 0; LPBYTE pPackedDIB = NULL; LPBITMAPINFOHEADER pbmiHeader = NULL; unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0, OffsetBits = 0, nLinesCopied = 0; /* Get a pointer to the BITMAPOBJ structure */ pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC ); if (!pBmp) return hPackedDIB; /* Get the bitmap dimensions */ width = pBmp->bitmap.bmWidth; height = pBmp->bitmap.bmHeight; depth = pBmp->bitmap.bmBitsPixel; /* * A packed DIB contains a BITMAPINFO structure followed immediately by * an optional color palette and the pixel data. */ /* Calculate the size of the packed DIB */ cDataSize = DIB_GetDIBImageBytes( width, height, depth ); cPackedSize = sizeof(BITMAPINFOHEADER) + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 ) + cDataSize; /* Get the offset to the bits */ OffsetBits = cPackedSize - cDataSize; /* Allocate the packed DIB */ TRACE("\tAllocating packed DIB of size %d\n", cPackedSize); hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/, cPackedSize ); if ( !hPackedDIB ) { WARN("Could not allocate packed DIB!\n"); goto END; } /* A packed DIB starts with a BITMAPINFOHEADER */ pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB); pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB; /* Init the BITMAPINFOHEADER */ pbmiHeader->biSize = sizeof(BITMAPINFOHEADER); pbmiHeader->biWidth = width; pbmiHeader->biHeight = height; pbmiHeader->biPlanes = 1; pbmiHeader->biBitCount = depth; pbmiHeader->biCompression = BI_RGB; pbmiHeader->biSizeImage = 0; pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0; pbmiHeader->biClrUsed = 0; pbmiHeader->biClrImportant = 0; /* Retrieve the DIB bits from the bitmap and fill in the * DIB color table if present */ nLinesCopied = GetDIBits(hdc, /* Handle to device context */ hBmp, /* Handle to bitmap */ 0, /* First scan line to set in dest bitmap */ height, /* Number of scan lines to copy */ pPackedDIB + OffsetBits, /* [out] Address of array for bitmap bits */ (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */ 0); /* RGB or palette index */ GlobalUnlock(hPackedDIB); /* Cleanup if GetDIBits failed */ if (nLinesCopied != height) { TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height); GlobalFree(hPackedDIB); hPackedDIB = 0; } END: GDI_ReleaseObj( hBmp ); return hPackedDIB; }