| /* |
| * GDI bit-blit operations |
| * |
| * 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 |
| */ |
| |
| #include "config.h" |
| |
| #include <stdarg.h> |
| |
| #include <math.h> |
| #ifdef HAVE_FLOAT_H |
| #include <float.h> |
| #endif |
| |
| #include "windef.h" |
| #include "winbase.h" |
| #include "wingdi.h" |
| #include "gdi_private.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(bitblt); |
| |
| |
| /*********************************************************************** |
| * PatBlt (GDI32.@) |
| */ |
| BOOL WINAPI PatBlt( HDC hdc, INT left, INT top, |
| INT width, INT height, DWORD rop) |
| { |
| DC * dc = get_dc_ptr( hdc ); |
| BOOL bRet = FALSE; |
| |
| if (!dc) return FALSE; |
| |
| TRACE("%p %d,%d %dx%d %06x\n", hdc, left, top, width, height, rop ); |
| |
| if (dc->funcs->pPatBlt) |
| { |
| update_dc( dc ); |
| bRet = dc->funcs->pPatBlt( dc->physDev, left, top, width, height, rop ); |
| } |
| else if (dc->funcs->pStretchBlt) |
| { |
| update_dc( dc ); |
| bRet = dc->funcs->pStretchBlt( dc->physDev, left, top, width, height, NULL, 0, 0, 0, 0, rop ); |
| } |
| release_dc_ptr( dc ); |
| return bRet; |
| } |
| |
| |
| /*********************************************************************** |
| * BitBlt (GDI32.@) |
| */ |
| BOOL WINAPI BitBlt( HDC hdcDst, INT xDst, INT yDst, INT width, |
| INT height, HDC hdcSrc, INT xSrc, INT ySrc, DWORD rop ) |
| { |
| BOOL ret = FALSE; |
| DC *dcDst, *dcSrc; |
| |
| TRACE("hdcSrc=%p %d,%d -> hdcDest=%p %d,%d %dx%d rop=%06x\n", |
| hdcSrc, xSrc, ySrc, hdcDst, xDst, yDst, width, height, rop); |
| |
| if (!(dcDst = get_dc_ptr( hdcDst ))) return FALSE; |
| |
| if (dcDst->funcs->pBitBlt || dcDst->funcs->pStretchBlt) |
| { |
| update_dc( dcDst ); |
| dcSrc = get_dc_ptr( hdcSrc ); |
| if (dcSrc) update_dc( dcSrc ); |
| |
| if (dcDst->funcs->pBitBlt) |
| ret = dcDst->funcs->pBitBlt( dcDst->physDev, xDst, yDst, width, height, |
| dcSrc ? dcSrc->physDev : NULL, xSrc, ySrc, rop ); |
| else |
| ret = dcDst->funcs->pStretchBlt( dcDst->physDev, xDst, yDst, width, height, |
| dcSrc ? dcSrc->physDev : NULL, xSrc, ySrc, |
| width, height, rop ); |
| |
| release_dc_ptr( dcDst ); |
| if (dcSrc) release_dc_ptr( dcSrc ); |
| } |
| else if (dcDst->funcs->pStretchDIBits) |
| { |
| BITMAP bm; |
| BITMAPINFOHEADER info_hdr; |
| HBITMAP hbm; |
| LPVOID bits; |
| INT lines; |
| |
| release_dc_ptr( dcDst ); |
| |
| if(GetObjectType( hdcSrc ) != OBJ_MEMDC) |
| { |
| FIXME("hdcSrc isn't a memory dc. Don't yet cope with this\n"); |
| return FALSE; |
| } |
| |
| GetObjectW(GetCurrentObject(hdcSrc, OBJ_BITMAP), sizeof(bm), &bm); |
| |
| info_hdr.biSize = sizeof(info_hdr); |
| info_hdr.biWidth = bm.bmWidth; |
| info_hdr.biHeight = bm.bmHeight; |
| info_hdr.biPlanes = 1; |
| info_hdr.biBitCount = 32; |
| info_hdr.biCompression = BI_RGB; |
| info_hdr.biSizeImage = 0; |
| info_hdr.biXPelsPerMeter = 0; |
| info_hdr.biYPelsPerMeter = 0; |
| info_hdr.biClrUsed = 0; |
| info_hdr.biClrImportant = 0; |
| |
| if(!(bits = HeapAlloc(GetProcessHeap(), 0, bm.bmHeight * bm.bmWidth * 4))) |
| return FALSE; |
| |
| /* Select out the src bitmap before calling GetDIBits */ |
| hbm = SelectObject(hdcSrc, GetStockObject(DEFAULT_BITMAP)); |
| GetDIBits(hdcSrc, hbm, 0, bm.bmHeight, bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS); |
| SelectObject(hdcSrc, hbm); |
| |
| lines = StretchDIBits(hdcDst, xDst, yDst, width, height, xSrc, bm.bmHeight - height - ySrc, |
| width, height, bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS, rop); |
| |
| HeapFree(GetProcessHeap(), 0, bits); |
| return (lines == height); |
| } |
| else release_dc_ptr( dcDst ); |
| |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * StretchBlt (GDI32.@) |
| */ |
| BOOL WINAPI StretchBlt( HDC hdcDst, INT xDst, INT yDst, |
| INT widthDst, INT heightDst, |
| HDC hdcSrc, INT xSrc, INT ySrc, |
| INT widthSrc, INT heightSrc, |
| DWORD rop ) |
| { |
| BOOL ret = FALSE; |
| DC *dcDst, *dcSrc; |
| |
| TRACE("%p %d,%d %dx%d -> %p %d,%d %dx%d rop=%06x\n", |
| hdcSrc, xSrc, ySrc, widthSrc, heightSrc, |
| hdcDst, xDst, yDst, widthDst, heightDst, rop ); |
| |
| |
| if (!(dcDst = get_dc_ptr( hdcDst ))) return FALSE; |
| |
| if (dcDst->funcs->pStretchBlt) |
| { |
| if ((dcSrc = get_dc_ptr( hdcSrc ))) |
| { |
| update_dc( dcDst ); |
| update_dc( dcSrc ); |
| |
| ret = dcDst->funcs->pStretchBlt( dcDst->physDev, xDst, yDst, widthDst, heightDst, |
| dcSrc->physDev, xSrc, ySrc, widthSrc, heightSrc, |
| rop ); |
| release_dc_ptr( dcDst ); |
| release_dc_ptr( dcSrc ); |
| } |
| } |
| else if (dcDst->funcs->pStretchDIBits) |
| { |
| BITMAP bm; |
| BITMAPINFOHEADER info_hdr; |
| HBITMAP hbm; |
| LPVOID bits; |
| INT lines; |
| POINT pts[2]; |
| |
| pts[0].x = xSrc; |
| pts[0].y = ySrc; |
| pts[1].x = xSrc + widthSrc; |
| pts[1].y = ySrc + heightSrc; |
| LPtoDP(hdcSrc, pts, 2); |
| xSrc = pts[0].x; |
| ySrc = pts[0].y; |
| widthSrc = pts[1].x - pts[0].x; |
| heightSrc = pts[1].y - pts[0].y; |
| |
| release_dc_ptr( dcDst ); |
| |
| if(GetObjectType( hdcSrc ) != OBJ_MEMDC) return FALSE; |
| |
| GetObjectW(GetCurrentObject(hdcSrc, OBJ_BITMAP), sizeof(bm), &bm); |
| |
| info_hdr.biSize = sizeof(info_hdr); |
| info_hdr.biWidth = bm.bmWidth; |
| info_hdr.biHeight = bm.bmHeight; |
| info_hdr.biPlanes = 1; |
| info_hdr.biBitCount = 32; |
| info_hdr.biCompression = BI_RGB; |
| info_hdr.biSizeImage = 0; |
| info_hdr.biXPelsPerMeter = 0; |
| info_hdr.biYPelsPerMeter = 0; |
| info_hdr.biClrUsed = 0; |
| info_hdr.biClrImportant = 0; |
| |
| if(!(bits = HeapAlloc(GetProcessHeap(), 0, bm.bmHeight * bm.bmWidth * 4))) |
| return FALSE; |
| |
| /* Select out the src bitmap before calling GetDIBits */ |
| hbm = SelectObject(hdcSrc, GetStockObject(DEFAULT_BITMAP)); |
| GetDIBits(hdcSrc, hbm, 0, bm.bmHeight, bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS); |
| SelectObject(hdcSrc, hbm); |
| |
| lines = StretchDIBits(hdcDst, xDst, yDst, widthDst, heightDst, xSrc, bm.bmHeight - heightSrc - ySrc, |
| widthSrc, heightSrc, bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS, rop); |
| |
| HeapFree(GetProcessHeap(), 0, bits); |
| return (lines == heightSrc); |
| } |
| else release_dc_ptr( dcDst ); |
| |
| return ret; |
| } |
| |
| #define FRGND_ROP3(ROP4) ((ROP4) & 0x00FFFFFF) |
| #define BKGND_ROP3(ROP4) (ROP3Table[((ROP4)>>24) & 0xFF]) |
| |
| /*********************************************************************** |
| * MaskBlt [GDI32.@] |
| */ |
| BOOL WINAPI MaskBlt(HDC hdcDest, INT nXDest, INT nYDest, |
| INT nWidth, INT nHeight, HDC hdcSrc, |
| INT nXSrc, INT nYSrc, HBITMAP hbmMask, |
| INT xMask, INT yMask, DWORD dwRop) |
| { |
| HBITMAP hBitmap1, hOldBitmap1, hBitmap2, hOldBitmap2; |
| HDC hDC1, hDC2; |
| HBRUSH hbrMask, hbrDst, hbrTmp; |
| |
| static const DWORD ROP3Table[256] = |
| { |
| 0x00000042, 0x00010289, |
| 0x00020C89, 0x000300AA, |
| 0x00040C88, 0x000500A9, |
| 0x00060865, 0x000702C5, |
| 0x00080F08, 0x00090245, |
| 0x000A0329, 0x000B0B2A, |
| 0x000C0324, 0x000D0B25, |
| 0x000E08A5, 0x000F0001, |
| 0x00100C85, 0x001100A6, |
| 0x00120868, 0x001302C8, |
| 0x00140869, 0x001502C9, |
| 0x00165CCA, 0x00171D54, |
| 0x00180D59, 0x00191CC8, |
| 0x001A06C5, 0x001B0768, |
| 0x001C06CA, 0x001D0766, |
| 0x001E01A5, 0x001F0385, |
| 0x00200F09, 0x00210248, |
| 0x00220326, 0x00230B24, |
| 0x00240D55, 0x00251CC5, |
| 0x002606C8, 0x00271868, |
| 0x00280369, 0x002916CA, |
| 0x002A0CC9, 0x002B1D58, |
| 0x002C0784, 0x002D060A, |
| 0x002E064A, 0x002F0E2A, |
| 0x0030032A, 0x00310B28, |
| 0x00320688, 0x00330008, |
| 0x003406C4, 0x00351864, |
| 0x003601A8, 0x00370388, |
| 0x0038078A, 0x00390604, |
| 0x003A0644, 0x003B0E24, |
| 0x003C004A, 0x003D18A4, |
| 0x003E1B24, 0x003F00EA, |
| 0x00400F0A, 0x00410249, |
| 0x00420D5D, 0x00431CC4, |
| 0x00440328, 0x00450B29, |
| 0x004606C6, 0x0047076A, |
| 0x00480368, 0x004916C5, |
| 0x004A0789, 0x004B0605, |
| 0x004C0CC8, 0x004D1954, |
| 0x004E0645, 0x004F0E25, |
| 0x00500325, 0x00510B26, |
| 0x005206C9, 0x00530764, |
| 0x005408A9, 0x00550009, |
| 0x005601A9, 0x00570389, |
| 0x00580785, 0x00590609, |
| 0x005A0049, 0x005B18A9, |
| 0x005C0649, 0x005D0E29, |
| 0x005E1B29, 0x005F00E9, |
| 0x00600365, 0x006116C6, |
| 0x00620786, 0x00630608, |
| 0x00640788, 0x00650606, |
| 0x00660046, 0x006718A8, |
| 0x006858A6, 0x00690145, |
| 0x006A01E9, 0x006B178A, |
| 0x006C01E8, 0x006D1785, |
| 0x006E1E28, 0x006F0C65, |
| 0x00700CC5, 0x00711D5C, |
| 0x00720648, 0x00730E28, |
| 0x00740646, 0x00750E26, |
| 0x00761B28, 0x007700E6, |
| 0x007801E5, 0x00791786, |
| 0x007A1E29, 0x007B0C68, |
| 0x007C1E24, 0x007D0C69, |
| 0x007E0955, 0x007F03C9, |
| 0x008003E9, 0x00810975, |
| 0x00820C49, 0x00831E04, |
| 0x00840C48, 0x00851E05, |
| 0x008617A6, 0x008701C5, |
| 0x008800C6, 0x00891B08, |
| 0x008A0E06, 0x008B0666, |
| 0x008C0E08, 0x008D0668, |
| 0x008E1D7C, 0x008F0CE5, |
| 0x00900C45, 0x00911E08, |
| 0x009217A9, 0x009301C4, |
| 0x009417AA, 0x009501C9, |
| 0x00960169, 0x0097588A, |
| 0x00981888, 0x00990066, |
| 0x009A0709, 0x009B07A8, |
| 0x009C0704, 0x009D07A6, |
| 0x009E16E6, 0x009F0345, |
| 0x00A000C9, 0x00A11B05, |
| 0x00A20E09, 0x00A30669, |
| 0x00A41885, 0x00A50065, |
| 0x00A60706, 0x00A707A5, |
| 0x00A803A9, 0x00A90189, |
| 0x00AA0029, 0x00AB0889, |
| 0x00AC0744, 0x00AD06E9, |
| 0x00AE0B06, 0x00AF0229, |
| 0x00B00E05, 0x00B10665, |
| 0x00B21974, 0x00B30CE8, |
| 0x00B4070A, 0x00B507A9, |
| 0x00B616E9, 0x00B70348, |
| 0x00B8074A, 0x00B906E6, |
| 0x00BA0B09, 0x00BB0226, |
| 0x00BC1CE4, 0x00BD0D7D, |
| 0x00BE0269, 0x00BF08C9, |
| 0x00C000CA, 0x00C11B04, |
| 0x00C21884, 0x00C3006A, |
| 0x00C40E04, 0x00C50664, |
| 0x00C60708, 0x00C707AA, |
| 0x00C803A8, 0x00C90184, |
| 0x00CA0749, 0x00CB06E4, |
| 0x00CC0020, 0x00CD0888, |
| 0x00CE0B08, 0x00CF0224, |
| 0x00D00E0A, 0x00D1066A, |
| 0x00D20705, 0x00D307A4, |
| 0x00D41D78, 0x00D50CE9, |
| 0x00D616EA, 0x00D70349, |
| 0x00D80745, 0x00D906E8, |
| 0x00DA1CE9, 0x00DB0D75, |
| 0x00DC0B04, 0x00DD0228, |
| 0x00DE0268, 0x00DF08C8, |
| 0x00E003A5, 0x00E10185, |
| 0x00E20746, 0x00E306EA, |
| 0x00E40748, 0x00E506E5, |
| 0x00E61CE8, 0x00E70D79, |
| 0x00E81D74, 0x00E95CE6, |
| 0x00EA02E9, 0x00EB0849, |
| 0x00EC02E8, 0x00ED0848, |
| 0x00EE0086, 0x00EF0A08, |
| 0x00F00021, 0x00F10885, |
| 0x00F20B05, 0x00F3022A, |
| 0x00F40B0A, 0x00F50225, |
| 0x00F60265, 0x00F708C5, |
| 0x00F802E5, 0x00F90845, |
| 0x00FA0089, 0x00FB0A09, |
| 0x00FC008A, 0x00FD0A0A, |
| 0x00FE02A9, 0x00FF0062, |
| }; |
| |
| if (!hbmMask) |
| return BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, FRGND_ROP3(dwRop)); |
| |
| hbrMask = CreatePatternBrush(hbmMask); |
| hbrDst = SelectObject(hdcDest, GetStockObject(NULL_BRUSH)); |
| |
| /* make bitmap */ |
| hDC1 = CreateCompatibleDC(hdcDest); |
| hBitmap1 = CreateCompatibleBitmap(hdcDest, nWidth, nHeight); |
| hOldBitmap1 = SelectObject(hDC1, hBitmap1); |
| |
| /* draw using bkgnd rop */ |
| BitBlt(hDC1, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest, SRCCOPY); |
| hbrTmp = SelectObject(hDC1, hbrDst); |
| BitBlt(hDC1, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, BKGND_ROP3(dwRop)); |
| SelectObject(hDC1, hbrTmp); |
| |
| /* make bitmap */ |
| hDC2 = CreateCompatibleDC(hdcDest); |
| hBitmap2 = CreateCompatibleBitmap(hdcDest, nWidth, nHeight); |
| hOldBitmap2 = SelectObject(hDC2, hBitmap2); |
| |
| /* draw using foregnd rop */ |
| BitBlt(hDC2, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest, SRCCOPY); |
| hbrTmp = SelectObject(hDC2, hbrDst); |
| BitBlt(hDC2, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, FRGND_ROP3(dwRop)); |
| |
| /* combine both using the mask as a pattern brush */ |
| SelectObject(hDC2, hbrMask); |
| BitBlt(hDC2, 0, 0, nWidth, nHeight, hDC1, 0, 0, 0xac0744 ); /* (D & P) | (S & ~P) */ |
| SelectObject(hDC2, hbrTmp); |
| |
| /* blit to dst */ |
| BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hDC2, 0, 0, SRCCOPY); |
| |
| /* restore all objects */ |
| SelectObject(hdcDest, hbrDst); |
| SelectObject(hDC1, hOldBitmap1); |
| SelectObject(hDC2, hOldBitmap2); |
| |
| /* delete all temp objects */ |
| DeleteObject(hBitmap1); |
| DeleteObject(hBitmap2); |
| DeleteObject(hbrMask); |
| |
| DeleteDC(hDC1); |
| DeleteDC(hDC2); |
| |
| return TRUE; |
| } |
| |
| /****************************************************************************** |
| * GdiTransparentBlt [GDI32.@] |
| */ |
| BOOL WINAPI GdiTransparentBlt( HDC hdcDest, int xDest, int yDest, int widthDest, int heightDest, |
| HDC hdcSrc, int xSrc, int ySrc, int widthSrc, int heightSrc, |
| UINT crTransparent ) |
| { |
| BOOL ret = FALSE; |
| HDC hdcWork; |
| HBITMAP bmpWork; |
| HGDIOBJ oldWork; |
| HDC hdcMask = NULL; |
| HBITMAP bmpMask = NULL; |
| HBITMAP oldMask = NULL; |
| COLORREF oldBackground; |
| COLORREF oldForeground; |
| int oldStretchMode; |
| |
| if(widthDest < 0 || heightDest < 0 || widthSrc < 0 || heightSrc < 0) { |
| TRACE("Cannot mirror\n"); |
| return FALSE; |
| } |
| |
| oldBackground = SetBkColor(hdcDest, RGB(255,255,255)); |
| oldForeground = SetTextColor(hdcDest, RGB(0,0,0)); |
| |
| /* Stretch bitmap */ |
| oldStretchMode = GetStretchBltMode(hdcSrc); |
| if(oldStretchMode == BLACKONWHITE || oldStretchMode == WHITEONBLACK) |
| SetStretchBltMode(hdcSrc, COLORONCOLOR); |
| hdcWork = CreateCompatibleDC(hdcDest); |
| bmpWork = CreateCompatibleBitmap(hdcDest, widthDest, heightDest); |
| oldWork = SelectObject(hdcWork, bmpWork); |
| if(!StretchBlt(hdcWork, 0, 0, widthDest, heightDest, hdcSrc, xSrc, ySrc, widthSrc, heightSrc, SRCCOPY)) { |
| TRACE("Failed to stretch\n"); |
| goto error; |
| } |
| SetBkColor(hdcWork, crTransparent); |
| |
| /* Create mask */ |
| hdcMask = CreateCompatibleDC(hdcDest); |
| bmpMask = CreateCompatibleBitmap(hdcMask, widthDest, heightDest); |
| oldMask = SelectObject(hdcMask, bmpMask); |
| if(!BitBlt(hdcMask, 0, 0, widthDest, heightDest, hdcWork, 0, 0, SRCCOPY)) { |
| TRACE("Failed to create mask\n"); |
| goto error; |
| } |
| |
| /* Replace transparent color with black */ |
| SetBkColor(hdcWork, RGB(0,0,0)); |
| SetTextColor(hdcWork, RGB(255,255,255)); |
| if(!BitBlt(hdcWork, 0, 0, widthDest, heightDest, hdcMask, 0, 0, SRCAND)) { |
| TRACE("Failed to mask out background\n"); |
| goto error; |
| } |
| |
| /* Replace non-transparent area on destination with black */ |
| if(!BitBlt(hdcDest, xDest, yDest, widthDest, heightDest, hdcMask, 0, 0, SRCAND)) { |
| TRACE("Failed to clear destination area\n"); |
| goto error; |
| } |
| |
| /* Draw the image */ |
| if(!BitBlt(hdcDest, xDest, yDest, widthDest, heightDest, hdcWork, 0, 0, SRCPAINT)) { |
| TRACE("Failed to paint image\n"); |
| goto error; |
| } |
| |
| ret = TRUE; |
| error: |
| SetStretchBltMode(hdcSrc, oldStretchMode); |
| SetBkColor(hdcDest, oldBackground); |
| SetTextColor(hdcDest, oldForeground); |
| if(hdcWork) { |
| SelectObject(hdcWork, oldWork); |
| DeleteDC(hdcWork); |
| } |
| if(bmpWork) DeleteObject(bmpWork); |
| if(hdcMask) { |
| SelectObject(hdcMask, oldMask); |
| DeleteDC(hdcMask); |
| } |
| if(bmpMask) DeleteObject(bmpMask); |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * GdiAlphaBlend [GDI32.@] |
| */ |
| BOOL WINAPI GdiAlphaBlend(HDC hdcDst, int xDst, int yDst, int widthDst, int heightDst, |
| HDC hdcSrc, int xSrc, int ySrc, int widthSrc, int heightSrc, |
| BLENDFUNCTION blendFunction) |
| { |
| BOOL ret = FALSE; |
| DC *dcDst, *dcSrc; |
| |
| dcSrc = get_dc_ptr( hdcSrc ); |
| if (!dcSrc) return FALSE; |
| |
| if ((dcDst = get_dc_ptr( hdcDst ))) |
| { |
| update_dc( dcSrc ); |
| update_dc( dcDst ); |
| TRACE("%p %d,%d %dx%d -> %p %d,%d %dx%d op=%02x flags=%02x srcconstalpha=%02x alphafmt=%02x\n", |
| hdcSrc, xSrc, ySrc, widthSrc, heightSrc, |
| hdcDst, xDst, yDst, widthDst, heightDst, |
| blendFunction.BlendOp, blendFunction.BlendFlags, |
| blendFunction.SourceConstantAlpha, blendFunction.AlphaFormat); |
| if (dcDst->funcs->pAlphaBlend) |
| ret = dcDst->funcs->pAlphaBlend( dcDst->physDev, xDst, yDst, widthDst, heightDst, |
| dcSrc->physDev, xSrc, ySrc, widthSrc, heightSrc, |
| blendFunction ); |
| release_dc_ptr( dcDst ); |
| } |
| release_dc_ptr( dcSrc ); |
| return ret; |
| } |
| |
| /********************************************************************* |
| * PlgBlt [GDI32.@] |
| * |
| */ |
| BOOL WINAPI PlgBlt( HDC hdcDest, const POINT *lpPoint, |
| HDC hdcSrc, INT nXSrc, INT nYSrc, INT nWidth, |
| INT nHeight, HBITMAP hbmMask, INT xMask, INT yMask) |
| { |
| int oldgMode; |
| /* parallelogram coords */ |
| POINT plg[3]; |
| /* rect coords */ |
| POINT rect[3]; |
| XFORM xf; |
| XFORM SrcXf; |
| XFORM oldDestXf; |
| double det; |
| |
| /* save actual mode, set GM_ADVANCED */ |
| oldgMode = SetGraphicsMode(hdcDest,GM_ADVANCED); |
| if (oldgMode == 0) |
| return FALSE; |
| |
| memcpy(plg,lpPoint,sizeof(POINT)*3); |
| rect[0].x = nXSrc; |
| rect[0].y = nYSrc; |
| rect[1].x = nXSrc + nWidth; |
| rect[1].y = nYSrc; |
| rect[2].x = nXSrc; |
| rect[2].y = nYSrc + nHeight; |
| /* calc XFORM matrix to transform hdcDest -> hdcSrc (parallelogram to rectangle) */ |
| /* determinant */ |
| det = rect[1].x*(rect[2].y - rect[0].y) - rect[2].x*(rect[1].y - rect[0].y) - rect[0].x*(rect[2].y - rect[1].y); |
| |
| if (fabs(det) < 1e-5) |
| { |
| SetGraphicsMode(hdcDest,oldgMode); |
| return FALSE; |
| } |
| |
| TRACE("hdcSrc=%p %d,%d,%dx%d -> hdcDest=%p %d,%d,%d,%d,%d,%d\n", |
| hdcSrc, nXSrc, nYSrc, nWidth, nHeight, hdcDest, plg[0].x, plg[0].y, plg[1].x, plg[1].y, plg[2].x, plg[2].y); |
| |
| /* X components */ |
| xf.eM11 = (plg[1].x*(rect[2].y - rect[0].y) - plg[2].x*(rect[1].y - rect[0].y) - plg[0].x*(rect[2].y - rect[1].y)) / det; |
| xf.eM21 = (rect[1].x*(plg[2].x - plg[0].x) - rect[2].x*(plg[1].x - plg[0].x) - rect[0].x*(plg[2].x - plg[1].x)) / det; |
| xf.eDx = (rect[0].x*(rect[1].y*plg[2].x - rect[2].y*plg[1].x) - |
| rect[1].x*(rect[0].y*plg[2].x - rect[2].y*plg[0].x) + |
| rect[2].x*(rect[0].y*plg[1].x - rect[1].y*plg[0].x) |
| ) / det; |
| |
| /* Y components */ |
| xf.eM12 = (plg[1].y*(rect[2].y - rect[0].y) - plg[2].y*(rect[1].y - rect[0].y) - plg[0].y*(rect[2].y - rect[1].y)) / det; |
| xf.eM22 = (plg[1].x*(rect[2].y - rect[0].y) - plg[2].x*(rect[1].y - rect[0].y) - plg[0].x*(rect[2].y - rect[1].y)) / det; |
| xf.eDy = (rect[0].x*(rect[1].y*plg[2].y - rect[2].y*plg[1].y) - |
| rect[1].x*(rect[0].y*plg[2].y - rect[2].y*plg[0].y) + |
| rect[2].x*(rect[0].y*plg[1].y - rect[1].y*plg[0].y) |
| ) / det; |
| |
| GetWorldTransform(hdcSrc,&SrcXf); |
| CombineTransform(&xf,&xf,&SrcXf); |
| |
| /* save actual dest transform */ |
| GetWorldTransform(hdcDest,&oldDestXf); |
| |
| SetWorldTransform(hdcDest,&xf); |
| /* now destination and source DCs use same coords */ |
| MaskBlt(hdcDest,nXSrc,nYSrc,nWidth,nHeight, |
| hdcSrc, nXSrc,nYSrc, |
| hbmMask,xMask,yMask, |
| SRCCOPY); |
| /* restore dest DC */ |
| SetWorldTransform(hdcDest,&oldDestXf); |
| SetGraphicsMode(hdcDest,oldgMode); |
| |
| return TRUE; |
| } |
