| /* |
| * 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 <assert.h> |
| |
| #include "windef.h" |
| #include "winbase.h" |
| #include "gdi_private.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(bitmap); |
| |
| |
| /*********************************************************************** |
| * 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; |
| } |
| |
| /******************************************************************************************* |
| * Fill out a true BITMAPINFO from a variable sized BITMAPINFO / BITMAPCOREINFO. |
| */ |
| static BOOL bitmapinfo_from_user_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *info, UINT coloruse ) |
| { |
| LONG width, height; |
| WORD planes, bpp; |
| DWORD compr, size; |
| void *src_colors = (char *)info + info->bmiHeader.biSize; |
| unsigned int colors; |
| int bitmap_type = DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size ); |
| |
| if (bitmap_type == -1) return FALSE; |
| |
| colors = (bpp > 8) ? 0 : 1 << bpp; |
| |
| if (bitmap_type == 1) |
| { |
| dst->bmiHeader = info->bmiHeader; |
| dst->bmiHeader.biSize = sizeof(dst->bmiHeader); |
| |
| if (info->bmiHeader.biClrUsed) colors = info->bmiHeader.biClrUsed; |
| |
| if (info->bmiHeader.biCompression == BI_BITFIELDS) |
| /* bitfields are always at bmiColors even in larger structures */ |
| memcpy( dst->bmiColors, info->bmiColors, 3 * sizeof(DWORD) ); |
| else if (colors) |
| { |
| unsigned int size; |
| |
| if (coloruse == DIB_PAL_COLORS) |
| size = colors * sizeof(WORD); |
| else |
| size = colors * sizeof(RGBQUAD); |
| memcpy( dst->bmiColors, src_colors, size ); |
| } |
| } |
| else |
| { |
| dst->bmiHeader.biSize = sizeof(dst->bmiHeader); |
| dst->bmiHeader.biWidth = width; |
| dst->bmiHeader.biHeight = height; |
| dst->bmiHeader.biPlanes = planes; |
| dst->bmiHeader.biBitCount = bpp; |
| dst->bmiHeader.biCompression = compr; |
| dst->bmiHeader.biSizeImage = size; |
| dst->bmiHeader.biXPelsPerMeter = 0; |
| dst->bmiHeader.biYPelsPerMeter = 0; |
| dst->bmiHeader.biClrUsed = 0; |
| dst->bmiHeader.biClrImportant = 0; |
| |
| if (colors) |
| { |
| if (coloruse == DIB_PAL_COLORS) |
| memcpy( dst->bmiColors, src_colors, colors * sizeof(WORD) ); |
| else |
| { |
| unsigned int i; |
| RGBTRIPLE *triple = (RGBTRIPLE *)src_colors; |
| for (i = 0; i < colors; i++) |
| { |
| dst->bmiColors[i].rgbRed = triple[i].rgbtRed; |
| dst->bmiColors[i].rgbGreen = triple[i].rgbtGreen; |
| dst->bmiColors[i].rgbBlue = triple[i].rgbtBlue; |
| dst->bmiColors[i].rgbReserved = 0; |
| } |
| } |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| static int fill_color_table_from_palette( BITMAPINFO *info, DC *dc ) |
| { |
| PALETTEENTRY palEntry[256]; |
| int i, colors = (info->bmiHeader.biBitCount > 8) ? 0 : 1 << info->bmiHeader.biBitCount; |
| |
| if (info->bmiHeader.biClrUsed) colors = info->bmiHeader.biClrUsed; |
| |
| if (!colors) return 0; |
| |
| memset( palEntry, 0, sizeof(palEntry) ); |
| if (!GetPaletteEntries( dc->hPalette, 0, colors, palEntry )) |
| return 0; |
| |
| for (i = 0; i < colors; i++) |
| { |
| info->bmiColors[i].rgbRed = palEntry[i].peRed; |
| info->bmiColors[i].rgbGreen = palEntry[i].peGreen; |
| info->bmiColors[i].rgbBlue = palEntry[i].peBlue; |
| info->bmiColors[i].rgbReserved = 0; |
| } |
| |
| return colors; |
| } |
| |
| /* nulldrv fallback implementation using SetDIBits/StretchBlt */ |
| INT 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, abs( 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, abs( 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; |
| char src_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )]; |
| BITMAPINFO *src_info = (BITMAPINFO *)src_bmibuf; |
| 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; |
| } |
| |
| if (!bitmapinfo_from_user_bitmapinfo( src_info, info, coloruse )) goto done; |
| |
| physdev = GET_DC_PHYSDEV( dc, pSetDIBits ); |
| if (!BITMAP_SetOwnerDC( hbitmap, physdev )) goto done; |
| |
| result = physdev->funcs->pSetDIBits( physdev, hbitmap, startscan, lines, bits, src_info, coloruse ); |
| |
| done: |
| 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 } |
| }; |
| |
| static const DWORD bit_fields_888[3] = {0xff0000, 0x00ff00, 0x0000ff}; |
| static const DWORD bit_fields_565[3] = {0xf800, 0x07e0, 0x001f}; |
| static const DWORD bit_fields_555[3] = {0x7c00, 0x03e0, 0x001f}; |
| |
| static int fill_query_info( BITMAPINFO *info, BITMAPOBJ *bmp ) |
| { |
| BITMAPINFOHEADER header; |
| |
| header.biSize = info->bmiHeader.biSize; /* Ensure we don't overwrite the original size when we copy back */ |
| header.biWidth = bmp->bitmap.bmWidth; |
| header.biHeight = bmp->bitmap.bmHeight; |
| header.biPlanes = 1; |
| |
| if (bmp->dib) |
| { |
| header.biBitCount = bmp->dib->dsBm.bmBitsPixel; |
| switch (bmp->dib->dsBm.bmBitsPixel) |
| { |
| case 16: |
| case 32: |
| header.biCompression = BI_BITFIELDS; |
| break; |
| default: |
| header.biCompression = BI_RGB; |
| break; |
| } |
| } |
| else |
| { |
| header.biCompression = (bmp->bitmap.bmBitsPixel > 8) ? BI_BITFIELDS : BI_RGB; |
| header.biBitCount = bmp->bitmap.bmBitsPixel; |
| } |
| |
| header.biSizeImage = get_dib_image_size( (BITMAPINFO *)&header ); |
| header.biXPelsPerMeter = 0; |
| header.biYPelsPerMeter = 0; |
| header.biClrUsed = 0; |
| header.biClrImportant = 0; |
| |
| if ( info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER) ) |
| { |
| BITMAPCOREHEADER *coreheader = (BITMAPCOREHEADER *)info; |
| |
| coreheader->bcWidth = header.biWidth; |
| coreheader->bcHeight = header.biHeight; |
| coreheader->bcPlanes = header.biPlanes; |
| coreheader->bcBitCount = header.biBitCount; |
| } |
| else |
| info->bmiHeader = header; |
| |
| return abs(bmp->bitmap.bmHeight); |
| } |
| |
| /************************************************************************ |
| * copy_color_info |
| * |
| * Copy BITMAPINFO color information where dst may be a BITMAPCOREINFO. |
| */ |
| static void copy_color_info(BITMAPINFO *dst, const BITMAPINFO *src, UINT coloruse) |
| { |
| unsigned int colors = src->bmiHeader.biBitCount > 8 ? 0 : 1 << src->bmiHeader.biBitCount; |
| RGBQUAD *src_colors = (RGBQUAD *)((char *)src + src->bmiHeader.biSize); |
| |
| assert( src->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) ); |
| |
| if (src->bmiHeader.biClrUsed) colors = src->bmiHeader.biClrUsed; |
| |
| if (dst->bmiHeader.biSize == sizeof(BITMAPCOREHEADER)) |
| { |
| BITMAPCOREINFO *core = (BITMAPCOREINFO *)dst; |
| if (coloruse == DIB_PAL_COLORS) |
| memcpy( core->bmciColors, src_colors, colors * sizeof(WORD) ); |
| else |
| { |
| unsigned int i; |
| for (i = 0; i < colors; i++) |
| { |
| core->bmciColors[i].rgbtRed = src_colors[i].rgbRed; |
| core->bmciColors[i].rgbtGreen = src_colors[i].rgbGreen; |
| core->bmciColors[i].rgbtBlue = src_colors[i].rgbBlue; |
| } |
| } |
| } |
| else |
| { |
| dst->bmiHeader.biClrUsed = src->bmiHeader.biClrUsed; |
| dst->bmiHeader.biSizeImage = src->bmiHeader.biSizeImage; |
| |
| if (src->bmiHeader.biCompression == BI_BITFIELDS) |
| /* bitfields are always at bmiColors even in larger structures */ |
| memcpy( dst->bmiColors, src->bmiColors, 3 * sizeof(DWORD) ); |
| else if (colors) |
| { |
| void *colorptr = (char *)dst + dst->bmiHeader.biSize; |
| unsigned int size; |
| |
| if (coloruse == DIB_PAL_COLORS) |
| size = colors * sizeof(WORD); |
| else |
| size = colors * sizeof(RGBQUAD); |
| memcpy( colorptr, src_colors, size ); |
| } |
| } |
| } |
| |
| static void fill_default_color_table( BITMAPINFO *info ) |
| { |
| int i; |
| |
| 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: |
| /* The EGA palette is the first and last 8 colours of the default palette |
| with the innermost pair swapped */ |
| memcpy(info->bmiColors, DefLogPaletteQuads, 7 * sizeof(RGBQUAD)); |
| memcpy(info->bmiColors + 7, DefLogPaletteQuads + 12, 1 * sizeof(RGBQUAD)); |
| memcpy(info->bmiColors + 8, DefLogPaletteQuads + 7, 1 * sizeof(RGBQUAD)); |
| memcpy(info->bmiColors + 9, DefLogPaletteQuads + 13, 7 * sizeof(RGBQUAD)); |
| break; |
| |
| case 8: |
| memcpy(info->bmiColors, DefLogPaletteQuads, 10 * sizeof(RGBQUAD)); |
| memcpy(info->bmiColors + 246, DefLogPaletteQuads + 10, 10 * sizeof(RGBQUAD)); |
| for (i = 10; i < 246; i++) |
| { |
| info->bmiColors[i].rgbRed = (i & 0x07) << 5; |
| info->bmiColors[i].rgbGreen = (i & 0x38) << 2; |
| info->bmiColors[i].rgbBlue = i & 0xc0; |
| info->bmiColors[i].rgbReserved = 0; |
| } |
| break; |
| |
| default: |
| ERR("called with bitcount %d\n", info->bmiHeader.biBitCount); |
| } |
| } |
| |
| /****************************************************************************** |
| * 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; |
| LONG width; |
| LONG height; |
| WORD planes, bpp; |
| DWORD compr, size; |
| char dst_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )]; |
| BITMAPINFO *dst_info = (BITMAPINFO *)dst_bmibuf; |
| unsigned int colors = 0; |
| |
| 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; |
| } |
| 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; |
| } |
| |
| |
| if (bpp == 0) /* query bitmap info only */ |
| { |
| lines = fill_query_info( info, bmp ); |
| goto done; |
| } |
| |
| /* Since info may be a BITMAPCOREINFO or any of the larger BITMAPINFO structures, we'll use our |
| own copy and transfer the colour info back at the end */ |
| |
| dst_info->bmiHeader.biSize = sizeof(dst_info->bmiHeader); |
| dst_info->bmiHeader.biWidth = width; |
| dst_info->bmiHeader.biHeight = height; |
| dst_info->bmiHeader.biPlanes = planes; |
| dst_info->bmiHeader.biBitCount = bpp; |
| dst_info->bmiHeader.biCompression = compr; |
| dst_info->bmiHeader.biSizeImage = get_dib_image_size( dst_info ); |
| dst_info->bmiHeader.biXPelsPerMeter = 0; |
| dst_info->bmiHeader.biYPelsPerMeter = 0; |
| dst_info->bmiHeader.biClrUsed = 0; |
| dst_info->bmiHeader.biClrImportant = 0; |
| |
| switch (bpp) |
| { |
| case 1: |
| case 4: |
| case 8: |
| { |
| colors = 1 << bpp; |
| |
| /* If the bitmap object is a dib section at the |
| same color depth then get the color map from it */ |
| if (bmp->dib && bpp == bmp->dib->dsBm.bmBitsPixel && coloruse == DIB_RGB_COLORS) |
| { |
| colors = min( colors, bmp->nb_colors ); |
| if (colors != 1 << bpp) dst_info->bmiHeader.biClrUsed = colors; |
| memcpy( dst_info->bmiColors, 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. In the DIB_PAL_COLORS |
| case we'll fix up the indices after the format conversion. */ |
| else if ( (bpp > 1 && bpp == bmp->bitmap.bmBitsPixel) || coloruse == DIB_PAL_COLORS ) |
| { |
| if (!fill_color_table_from_palette( dst_info, dc )) |
| { |
| lines = 0; |
| goto done; |
| } |
| } |
| else |
| fill_default_color_table( dst_info ); |
| break; |
| } |
| |
| case 15: |
| if (dst_info->bmiHeader.biCompression == BI_BITFIELDS) |
| memcpy( dst_info->bmiColors, bit_fields_555, sizeof(bit_fields_555) ); |
| break; |
| |
| case 16: |
| if (dst_info->bmiHeader.biCompression == BI_BITFIELDS) |
| { |
| if (bmp->dib) |
| { |
| if (bmp->dib->dsBmih.biCompression == BI_BITFIELDS && bmp->dib->dsBmih.biBitCount == bpp) |
| memcpy( dst_info->bmiColors, bmp->dib->dsBitfields, 3 * sizeof(DWORD) ); |
| else |
| memcpy( dst_info->bmiColors, bit_fields_555, sizeof(bit_fields_555) ); |
| } |
| else |
| memcpy( dst_info->bmiColors, bit_fields_565, sizeof(bit_fields_565) ); |
| } |
| break; |
| |
| case 24: |
| case 32: |
| if (dst_info->bmiHeader.biCompression == BI_BITFIELDS) |
| { |
| if (bmp->dib && bmp->dib->dsBmih.biCompression == BI_BITFIELDS && bmp->dib->dsBmih.biBitCount == bpp) |
| memcpy( dst_info->bmiColors, bmp->dib->dsBitfields, 3 * sizeof(DWORD) ); |
| else |
| memcpy( dst_info->bmiColors, bit_fields_888, sizeof(bit_fields_888) ); |
| } |
| break; |
| } |
| |
| if (bits && lines) |
| { |
| PHYSDEV physdev; |
| char src_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )]; |
| BITMAPINFO *src_info = (BITMAPINFO *)src_bmibuf; |
| struct gdi_image_bits src_bits; |
| struct bitblt_coords src; |
| DWORD err; |
| |
| /* FIXME: will need updating once the dib driver has pGetImage. */ |
| physdev = GET_DC_PHYSDEV( dc, pGetImage ); |
| |
| if (!BITMAP_SetOwnerDC( hbitmap, physdev )) lines = 0; |
| |
| src.visrect.left = 0; |
| src.visrect.right = min( width, bmp->bitmap.bmWidth ); |
| |
| if (startscan >= bmp->bitmap.bmHeight) /* constrain lines to within src bitmap */ |
| lines = 0; |
| else |
| lines = min( lines, bmp->bitmap.bmHeight - startscan ); |
| lines = min( lines, abs(height) ); /* and constrain to within dest bitmap */ |
| |
| if (lines == 0) goto done; |
| |
| src.visrect.bottom = bmp->bitmap.bmHeight - startscan; |
| src.visrect.top = src.visrect.bottom - lines; |
| src.x = src.visrect.left; |
| src.y = src.visrect.top; |
| src.width = src.visrect.right - src.visrect.left; |
| src.height = src.visrect.bottom - src.visrect.top; |
| |
| err = physdev->funcs->pGetImage( physdev, hbitmap, src_info, &src_bits, &src ); |
| |
| if(err) |
| { |
| lines = 0; |
| goto done; |
| } |
| |
| if (src_info->bmiHeader.biBitCount <= 8 && src_info->bmiHeader.biClrUsed == 0) |
| { |
| if (bmp->dib) |
| memcpy( src_info->bmiColors, bmp->color_table, bmp->nb_colors * sizeof(RGBQUAD) ); |
| else |
| fill_default_color_table( src_info ); |
| } |
| |
| if(dst_info->bmiHeader.biHeight > 0) |
| dst_info->bmiHeader.biHeight = lines; |
| else |
| dst_info->bmiHeader.biHeight = -lines; |
| |
| convert_bitmapinfo( src_info, src_bits.ptr, &src.visrect, dst_info, bits ); |
| if (src_bits.free) src_bits.free( &src_bits ); |
| } |
| else lines = abs(height); |
| |
| if (coloruse == DIB_PAL_COLORS) |
| { |
| WORD *index = (WORD *)dst_info->bmiColors; |
| for (i = 0; i < colors; i++, index++) |
| *index = i; |
| } |
| |
| copy_color_info( info, dst_info, coloruse ); |
| |
| 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 = get_dib_stride( 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; |
| } |
