X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d285d708a229ece6ad606a460bcbf048c65d252b..82ac3b0a423b755c6329c2ae2faaab9576a3f647:/src/msw/dc.cpp diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp index e533015783..64e2dda0db 100644 --- a/src/msw/dc.cpp +++ b/src/msw/dc.cpp @@ -5,7 +5,7 @@ // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem +// Copyright: (c) Julian Smart // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// @@ -43,6 +43,7 @@ #include "wx/sysopt.h" #include "wx/dcprint.h" #include "wx/module.h" +#include "wx/dynload.h" #include #include @@ -57,6 +58,11 @@ #include #endif +/* Quaternary raster codes */ +#ifndef MAKEROP4 +#define MAKEROP4(fore,back) (DWORD)((((back) << 8) & 0xFF000000) | (fore)) +#endif + IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase) // --------------------------------------------------------------------------- @@ -127,6 +133,30 @@ private: bool m_changed; }; +// this class saves the old stretch blit mode during its life time +class StretchBltModeChanger +{ +public: + StretchBltModeChanger(HDC hdc, int mode) + : m_hdc(hdc) + { + m_modeOld = ::SetStretchBltMode(m_hdc, mode); + if ( !m_modeOld ) + wxLogLastError(_T("SetStretchBltMode")); + } + + ~StretchBltModeChanger() + { + if ( !::SetStretchBltMode(m_hdc, m_modeOld) ) + wxLogLastError(_T("SetStretchBltMode")); + } + +private: + const HDC m_hdc; + + int m_modeOld; +}; + // =========================================================================== // implementation // =========================================================================== @@ -243,10 +273,12 @@ void wxDC::SelectOldObjects(WXHDC dc) if (m_oldBitmap) { ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap); +#ifdef __WXDEBUG__ if (m_selectedBitmap.Ok()) { m_selectedBitmap.SetSelectedInto(NULL); } +#endif } m_oldBitmap = 0; if (m_oldPen) @@ -910,6 +942,70 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask HPALETTE oldPal = 0; #endif // wxUSE_PALETTE + // do we have AlphaBlend() and company in the headers? +#ifdef AC_SRC_OVER + if ( bmp.HasAlpha() ) + { + // yes, now try to see if we have it during run-time + + typedef BOOL (WINAPI *AlphaBlend_t)(HDC,int,int,int,int, + HDC,int,int,int,int, + BLENDFUNCTION); + + // bitmaps can be drawn only from GUI thread so there is no need to + // protect this static variable from multiple threads + static bool s_triedToLoad = FALSE; + static AlphaBlend_t pfnAlphaBlend = NULL; + if ( !s_triedToLoad ) + { + s_triedToLoad = TRUE; + + // don't give errors about the DLL being unavailable, we're + // prepared to handle this + wxLogNull nolog; + + wxDynamicLibrary dll(_T("msimg32.dll")); + if ( dll.IsLoaded() ) + { + pfnAlphaBlend = (AlphaBlend_t)dll.GetSymbol(_T("AlphaBlend")); + if ( pfnAlphaBlend ) + { + // we must keep the DLL loaded if we want to be able to + // call AlphaBlend() so just never unload it at all, not a + // big deal + dll.Detach(); + } + } + } + + if ( pfnAlphaBlend ) + { + MemoryHDC hdcMem; + SelectInHDC select(hdcMem, GetHbitmapOf(bmp)); + +#ifndef AC_SRC_ALPHA + #define AC_SRC_ALPHA 1 +#endif + + BLENDFUNCTION bf; + bf.BlendOp = AC_SRC_OVER; + bf.BlendFlags = 0; + bf.SourceConstantAlpha = 0xff; + bf.AlphaFormat = AC_SRC_ALPHA; + + if ( !pfnAlphaBlend(GetHdc(), x, y, width, height, + hdcMem, 0, 0, width, height, + bf) ) + { + wxLogLastError(_T("AlphaBlend")); + } + + return; + } + //else: AlphaBlend() not available + } +#endif // defined(AC_SRC_OVER) + if ( useMask ) { wxMask *mask = bmp.GetMask(); @@ -1803,10 +1899,16 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0) #endif { - success = ::MaskBlt(GetHdc(), xdest, ydest, width, height, - GetHdcOf(*source), xsrc, ysrc, - (HBITMAP)mask->GetMaskBitmap(), xsrcMask, ysrcMask, - MAKEROP4(dwRop, DSTCOPY)) != 0; + success = ::MaskBlt + ( + GetHdc(), + xdest, ydest, width, height, + GetHdcOf(*source), + xsrc, ysrc, + (HBITMAP)mask->GetMaskBitmap(), + xsrcMask, ysrcMask, + MAKEROP4(dwRop, DSTCOPY) + ) != 0; } if ( !success ) @@ -1896,14 +1998,39 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, } else // no mask, just BitBlt() it { - success = ::BitBlt(GetHdc(), xdest, ydest, - (int)width, (int)height, - GetHdcOf(*source), xsrc, ysrc, dwRop) != 0; + // use StretchBlt() if available + if ( ::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHBLT ) + { + StretchBltModeChanger changeMode(GetHdc(), COLORONCOLOR); + + success = ::StretchBlt + ( + GetHdc(), + xdest, ydest, width, height, + GetHdcOf(*source), + xsrc, ysrc, width, height, + dwRop + ) != 0; + } + else + { + success = ::BitBlt + ( + GetHdc(), + xdest, ydest, + (int)width, (int)height, + GetHdcOf(*source), + xsrc, ysrc, + dwRop + ) != 0; + } + if ( !success ) { - wxLogLastError(wxT("BitBlt")); + wxLogLastError(wxT("BitBlt/StretchBlt")); } } + ::SetTextColor(GetHdc(), old_textground); ::SetBkColor(GetHdc(), old_background); @@ -1975,25 +2102,6 @@ void wxDC::SetLogicalScale(double x, double y) m_logicalScaleY = y; } -#if WXWIN_COMPATIBILITY -void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y, - float *descent, float *externalLeading, - wxFont *theFont, bool use16bit) const -{ -#ifdef __WXMICROWIN__ - if (!GetHDC()) return; -#endif - - wxCoord x1, y1, descent1, externalLeading1; - GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit); - *x = x1; *y = y1; - if (descent) - *descent = descent1; - if (externalLeading) - *externalLeading = externalLeading1; -} -#endif - #if wxUSE_DC_CACHEING /* @@ -2108,12 +2216,12 @@ void wxDC::AddToDCCache(wxDCCacheEntry* entry) void wxDC::ClearCache() { - sm_bitmapCache.DeleteContents(TRUE); - sm_bitmapCache.Clear(); - sm_bitmapCache.DeleteContents(FALSE); sm_dcCache.DeleteContents(TRUE); sm_dcCache.Clear(); sm_dcCache.DeleteContents(FALSE); + sm_bitmapCache.DeleteContents(TRUE); + sm_bitmapCache.Clear(); + sm_bitmapCache.DeleteContents(FALSE); } // Clean up cache at app exit