+
+ wxMask *mask = NULL;
+ if ( useMask )
+ {
+ mask = bmpSrc.GetMask();
+
+ if ( !(bmpSrc.IsOk() && mask && mask->GetMaskBitmap()) )
+ {
+ // don't give assert here because this would break existing
+ // programs - just silently ignore useMask parameter
+ useMask = false;
+ }
+ }
+
+ if (xsrcMask == -1 && ysrcMask == -1)
+ {
+ xsrcMask = xsrc; ysrcMask = ysrc;
+ }
+
+ wxTextColoursChanger textCol(GetHdc(), *this);
+
+ DWORD dwRop;
+ switch (rop)
+ {
+ case wxXOR: dwRop = SRCINVERT; break;
+ case wxINVERT: dwRop = DSTINVERT; break;
+ case wxOR_REVERSE: dwRop = 0x00DD0228; break;
+ case wxAND_REVERSE: dwRop = SRCERASE; break;
+ case wxCLEAR: dwRop = BLACKNESS; break;
+ case wxSET: dwRop = WHITENESS; break;
+ case wxOR_INVERT: dwRop = MERGEPAINT; break;
+ case wxAND: dwRop = SRCAND; break;
+ case wxOR: dwRop = SRCPAINT; break;
+ case wxEQUIV: dwRop = 0x00990066; break;
+ case wxNAND: dwRop = 0x007700E6; break;
+ case wxAND_INVERT: dwRop = 0x00220326; break;
+ case wxCOPY: dwRop = SRCCOPY; break;
+ case wxNO_OP: dwRop = DSTCOPY; break;
+ case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
+ case wxNOR: dwRop = NOTSRCCOPY; break;
+ default:
+ wxFAIL_MSG( wxT("unsupported logical function") );
+ return false;
+ }
+
+ bool success = false;
+
+ if (useMask)
+ {
+#ifdef __WIN32__
+ // we want the part of the image corresponding to the mask to be
+ // transparent, so use "DSTCOPY" ROP for the mask points (the usual
+ // meaning of fg and bg is inverted which corresponds to wxWin notion
+ // of the mask which is also contrary to the Windows one)
+
+ // On some systems, MaskBlt succeeds yet is much much slower
+ // than the wxWidgets fall-back implementation. So we need
+ // to be able to switch this on and off at runtime.
+#if wxUSE_SYSTEM_OPTIONS
+ if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
+#endif
+ {
+ if ( dstWidth == srcWidth && dstHeight == srcHeight )
+ {
+ success = ::MaskBlt
+ (
+ GetHdc(),
+ xdest, ydest, dstWidth, dstHeight,
+ hdcSrc,
+ xsrc, ysrc,
+ (HBITMAP)mask->GetMaskBitmap(),
+ xsrcMask, ysrcMask,
+ MAKEROP4(dwRop, DSTCOPY)
+ ) != 0;
+ }
+ }
+
+ if ( !success )
+#endif // Win32
+ {
+ // Blit bitmap with mask
+ HDC dc_mask ;
+ HDC dc_buffer ;
+ HBITMAP buffer_bmap ;
+
+#if wxUSE_DC_CACHEING
+ // create a temp buffer bitmap and DCs to access it and the mask
+ wxDCCacheEntry* dcCacheEntry1 = FindDCInCache(NULL, hdcSrc);
+ dc_mask = (HDC) dcCacheEntry1->m_dc;
+
+ wxDCCacheEntry* dcCacheEntry2 = FindDCInCache(dcCacheEntry1, GetHDC());
+ dc_buffer = (HDC) dcCacheEntry2->m_dc;
+
+ wxDCCacheEntry* bitmapCacheEntry = FindBitmapInCache(GetHDC(),
+ dstWidth, dstHeight);
+
+ buffer_bmap = (HBITMAP) bitmapCacheEntry->m_bitmap;
+#else // !wxUSE_DC_CACHEING
+ // create a temp buffer bitmap and DCs to access it and the mask
+ dc_mask = ::CreateCompatibleDC(hdcSrc);
+ dc_buffer = ::CreateCompatibleDC(GetHdc());
+ buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), dstWidth, dstHeight);
+#endif // wxUSE_DC_CACHEING/!wxUSE_DC_CACHEING
+ HGDIOBJ hOldMaskBitmap = ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
+ HGDIOBJ hOldBufferBitmap = ::SelectObject(dc_buffer, buffer_bmap);
+
+ // copy dest to buffer
+ if ( !::BitBlt(dc_buffer, 0, 0, dstWidth, dstHeight,
+ GetHdc(), xdest, ydest, SRCCOPY) )
+ {
+ wxLogLastError(wxT("BitBlt"));
+ }
+
+#ifndef __WXWINCE__
+ StretchBltModeChanger changeMode(dc_buffer, COLORONCOLOR);
+#endif
+
+ // copy src to buffer using selected raster op
+ if ( !::StretchBlt(dc_buffer, 0, 0, dstWidth, dstHeight,
+ hdcSrc, xsrc, ysrc, srcWidth, srcHeight, dwRop) )
+ {
+ wxLogLastError(wxT("StretchBlt"));
+ }
+
+ // set masked area in buffer to BLACK
+ {
+ wxTextColoursChanger textCol2(GetHdc(), *wxBLACK, *wxWHITE);
+ if ( !::StretchBlt(dc_buffer, 0, 0, dstWidth, dstHeight,
+ dc_mask, xsrcMask, ysrcMask,
+ srcWidth, srcHeight, SRCAND) )
+ {
+ wxLogLastError(wxT("StretchBlt"));
+ }
+
+ // set unmasked area in dest to BLACK
+ ::SetBkColor(GetHdc(), RGB(0, 0, 0));
+ ::SetTextColor(GetHdc(), RGB(255, 255, 255));
+ if ( !::StretchBlt(GetHdc(), xdest, ydest, dstWidth, dstHeight,
+ dc_mask, xsrcMask, ysrcMask,
+ srcWidth, srcHeight, SRCAND) )
+ {
+ wxLogLastError(wxT("StretchBlt"));
+ }
+ } // restore the original text and background colours
+
+ // OR buffer to dest
+ success = ::BitBlt(GetHdc(), xdest, ydest, dstWidth, dstHeight,
+ dc_buffer, 0, 0, SRCPAINT) != 0;
+ if ( !success )
+ {
+ wxLogLastError(wxT("BitBlt"));
+ }
+
+ // tidy up temporary DCs and bitmap
+ ::SelectObject(dc_mask, hOldMaskBitmap);
+ ::SelectObject(dc_buffer, hOldBufferBitmap);
+
+#if !wxUSE_DC_CACHEING
+ {
+ ::DeleteDC(dc_mask);
+ ::DeleteDC(dc_buffer);
+ ::DeleteObject(buffer_bmap);
+ }
projects / wxWidgets.git / blobdiff