X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/19193a2c85987b595932957e73013e7ea100f0e8..010024e17ee1c35dfb265c1b054ae88dbf7e1656:/src/msw/bitmap.cpp diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp index df9dcd8c70..3a3798dce3 100644 --- a/src/msw/bitmap.cpp +++ b/src/msw/bitmap.cpp @@ -1,12 +1,12 @@ -///////////////////////////////////////////////////////////////////////////// +//////////////////////////////////////////////////////////////////////////// // Name: bitmap.cpp // Purpose: wxBitmap // Author: Julian Smart // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// Copyright: (c) Julian Smart +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -17,7 +17,7 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "bitmap.h" #endif @@ -43,18 +43,86 @@ #include "wx/msw/private.h" #include "wx/log.h" -#if !defined(__WXMICROWIN__) +#if wxUSE_WXDIB #include "wx/msw/dib.h" #endif #include "wx/image.h" #include "wx/xpmdecod.h" +#ifdef wxHAVE_RAW_BITMAP +#include "wx/rawbmp.h" +#endif + // missing from mingw32 header #ifndef CLR_INVALID #define CLR_INVALID ((COLORREF)-1) #endif // no CLR_INVALID +// ---------------------------------------------------------------------------- +// Bitmap data +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxBitmapRefData : public wxGDIImageRefData +{ +public: + wxBitmapRefData(); + virtual ~wxBitmapRefData() { Free(); } + + virtual void Free(); + + // set the mask object to use as the mask, we take ownership of it + void SetMask(wxMask *mask) + { + delete m_bitmapMask; + m_bitmapMask = mask; + } + + // set the HBITMAP to use as the mask + void SetMask(HBITMAP hbmpMask) + { + SetMask(new wxMask((WXHBITMAP)hbmpMask)); + } + + // return the mask + wxMask *GetMask() const { return m_bitmapMask; } + +public: +#if wxUSE_PALETTE + wxPalette m_bitmapPalette; +#endif // wxUSE_PALETTE + + // MSW-specific + // ------------ + +#ifdef __WXDEBUG__ + // this field is solely for error checking: we detect selecting a bitmap + // into more than one DC at once or deleting a bitmap still selected into a + // DC (both are serious programming errors under Windows) + wxDC *m_selectedInto; +#endif // __WXDEBUG__ + +#if wxUSE_WXDIB + // when GetRawData() is called for a DDB we need to convert it to a DIB + // first to be able to provide direct access to it and we cache that DIB + // here and convert it back to DDB when UngetRawData() is called + wxDIB *m_dib; +#endif + + // true if we have alpha transparency info and can be drawn using + // AlphaBlend() + bool m_hasAlpha; + + // true if our HBITMAP is a DIB section, false if it is a DDB + bool m_isDIB; + +private: + // optional mask for transparent drawing + wxMask *m_bitmapMask; + + DECLARE_NO_COPY_CLASS(wxBitmapRefData) +}; + // ---------------------------------------------------------------------------- // macros // ---------------------------------------------------------------------------- @@ -68,17 +136,56 @@ IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject) // implementation // ============================================================================ +// ---------------------------------------------------------------------------- +// helper functions +// ---------------------------------------------------------------------------- + +// decide whether we should create a DIB or a DDB for the given parameters +static bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc) +{ +#if wxUSE_WXDIB + // here is the logic: + // + // (a) if hdc is specified, the caller explicitly wants DDB + // (b) otherwise, create a DIB if depth >= 24 (we don't support 16bpp or + // less DIBs anyhow) + // (c) finally, create DIBs under Win9x even if the depth hasn't been + // explicitly specified but the current display depth is 24 or more + // and the image is "big", i.e. > 16Mb which is the theoretical limit + // for DDBs under Win9x + // + // consequences (all of which seem to make sense): + // + // (i) by default, DDBs are created (depth == -1 usually) + // (ii) DIBs can be created by explicitly specifying the depth + // (iii) using a DC always forces creating a DDB + return !hdc && + (d >= 24 || + (d == -1 && + wxDIB::GetLineSize(w, wxDisplayDepth())*h > 16*1024*1024)); +#else + return FALSE; +#endif +} + // ---------------------------------------------------------------------------- // wxBitmapRefData // ---------------------------------------------------------------------------- wxBitmapRefData::wxBitmapRefData() { - m_quality = 0; +#ifdef __WXDEBUG__ m_selectedInto = NULL; - m_numColors = 0; +#endif m_bitmapMask = NULL; + m_hBitmap = (WXHBITMAP) NULL; +#if wxUSE_WXDIB + m_dib = NULL; +#endif + + m_isDIB = + m_hasAlpha = FALSE; } void wxBitmapRefData::Free() @@ -86,6 +193,10 @@ void wxBitmapRefData::Free() wxASSERT_MSG( !m_selectedInto, wxT("deleting bitmap still selected into wxMemoryDC") ); +#if wxUSE_WXDIB + wxASSERT_MSG( !m_dib, _T("forgot to call wxBitmap::UngetRawData()!") ); +#endif + if ( m_hBitmap) { if ( !::DeleteObject((HBITMAP)m_hBitmap) ) @@ -106,16 +217,18 @@ void wxBitmapRefData::Free() void wxBitmap::Init() { // m_refData = NULL; done in the base class ctor +} - if ( wxTheBitmapList ) - wxTheBitmapList->AddBitmap(this); +wxGDIImageRefData *wxBitmap::CreateData() const +{ + return new wxBitmapRefData; } #ifdef __WIN32__ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon) { -#ifndef __WXMICROWIN__ +#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) // it may be either HICON or HCURSOR HICON hicon = (HICON)icon.GetHandle(); @@ -141,12 +254,11 @@ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon) // the mask returned by GetIconInfo() is inversed compared to the usual // wxWin convention - refData->m_bitmapMask = new wxMask((WXHBITMAP) - wxInvertMask(iconInfo.hbmMask, w, h)); + refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h)); + -#if WXWIN_COMPATIBILITY_2 - refData->m_ok = TRUE; -#endif // WXWIN_COMPATIBILITY_2 + // delete the old one now as we don't need it any more + ::DeleteObject(iconInfo.hbmMask); return TRUE; #else @@ -206,20 +318,48 @@ bool wxBitmap::CopyFromIcon(const wxIcon& icon) refData->m_hBitmap = (WXHBITMAP)hbitmap; -#if WXWIN_COMPATIBILITY_2 - refData->m_ok = TRUE; -#endif // WXWIN_COMPATIBILITY_2 - return TRUE; #else // Win32 return CopyFromIconOrCursor(icon); #endif // Win16/Win32 } +#if wxUSE_WXDIB +bool wxBitmap::CopyFromDIB(const wxDIB& dib) +{ + wxCHECK_MSG( dib.IsOk(), FALSE, _T("invalid DIB in CopyFromDIB") ); + + HBITMAP hbitmap = dib.CreateDDB(); + if ( !hbitmap ) + return FALSE; + + UnRef(); + + wxBitmapRefData *refData = new wxBitmapRefData; + m_refData = refData; + + refData->m_width = dib.GetWidth(); + refData->m_height = dib.GetHeight(); + refData->m_depth = dib.GetDepth(); + + refData->m_hBitmap = (WXHBITMAP)hbitmap; + +#if wxUSE_PALETTE + wxPalette *palette = dib.CreatePalette(); + if ( palette ) + { + refData->m_bitmapPalette = *palette; + } + + delete palette; +#endif // wxUSE_PALETTE + + return TRUE; +} +#endif + wxBitmap::~wxBitmap() { - if (wxTheBitmapList) - wxTheBitmapList->DeleteObject(this); } wxBitmap::wxBitmap(const char bits[], int width, int height, int depth) @@ -233,8 +373,6 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth) refData->m_width = width; refData->m_height = height; refData->m_depth = depth; - refData->m_numColors = 0; - refData->m_selectedInto = NULL; char *data; if ( depth == 1 ) @@ -316,6 +454,13 @@ wxBitmap::wxBitmap(int w, int h, int d) (void)Create(w, h, d); } +wxBitmap::wxBitmap(int w, int h, const wxDC& dc) +{ + Init(); + + (void)Create(w, h, dc); +} + wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth) { Init(); @@ -330,121 +475,409 @@ wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type) LoadFile(filename, (int)type); } -bool wxBitmap::Create(int w, int h, int d) +bool wxBitmap::Create(int width, int height, int depth) +{ + return DoCreate(width, height, depth, 0); +} + +bool wxBitmap::Create(int width, int height, const wxDC& dc) +{ + wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::Create()") ); + + return DoCreate(width, height, -1, dc.GetHDC()); +} + +bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc) { -#ifndef __WXMICROWIN__ UnRef(); m_refData = new wxBitmapRefData; GetBitmapData()->m_width = w; GetBitmapData()->m_height = h; - GetBitmapData()->m_depth = d; HBITMAP hbmp; - if ( d > 0 ) +#if wxUSE_WXDIB + if ( wxShouldCreateDIB(w, h, d, hdc) ) { - hbmp = ::CreateBitmap(w, h, 1, d, NULL); - if ( !hbmp ) + if ( d == -1 ) { - wxLogLastError(wxT("CreateBitmap")); + // create DIBs without alpha channel by default + d = 24; } + + wxDIB dib(w, h, d); + if ( !dib.IsOk() ) + return FALSE; + + // don't delete the DIB section in dib object dtor + hbmp = dib.Detach(); + + GetBitmapData()->m_isDIB = TRUE; + GetBitmapData()->m_depth = d; } - else + else // create a DDB +#endif { - ScreenHDC dc; - hbmp = ::CreateCompatibleBitmap(dc, w, h); - if ( !hbmp ) + if ( d == -1 ) + d = wxDisplayDepth(); + + GetBitmapData()->m_depth = d; + +#ifndef __WXMICROWIN__ + if ( d > 0 ) { - wxLogLastError(wxT("CreateCompatibleBitmap")); + hbmp = ::CreateBitmap(w, h, 1, d, NULL); + if ( !hbmp ) + { + wxLogLastError(wxT("CreateBitmap")); + } } + else +#endif // !__WXMICROWIN__ + { + ScreenHDC dc; + hbmp = ::CreateCompatibleBitmap(dc, w, h); + if ( !hbmp ) + { + wxLogLastError(wxT("CreateCompatibleBitmap")); + } - GetBitmapData()->m_depth = wxDisplayDepth(); + GetBitmapData()->m_depth = wxDisplayDepth(); + } } SetHBITMAP((WXHBITMAP)hbmp); -#if WXWIN_COMPATIBILITY_2 - GetBitmapData()->m_ok = hbmp != 0; -#endif // WXWIN_COMPATIBILITY_2 return Ok(); +} + +#if wxUSE_IMAGE + +// ---------------------------------------------------------------------------- +// wxImage to/from conversions for Microwin +// ---------------------------------------------------------------------------- + +// Microwin versions are so different from normal ones that it really doesn't +// make sense to use #ifdefs inside the function bodies +#ifdef __WXMICROWIN__ + +bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc) +{ + // Set this to 1 to experiment with mask code, + // which currently doesn't work + #define USE_MASKS 0 + + m_refData = new wxBitmapRefData(); + + // Initial attempt at a simple-minded implementation. + // The bitmap will always be created at the screen depth, + // so the 'depth' argument is ignored. + + HDC hScreenDC = ::GetDC(NULL); + int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL); + + HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight()); + HBITMAP hMaskBitmap = NULL; + HBITMAP hOldMaskBitmap = NULL; + HDC hMaskDC = NULL; + unsigned char maskR = 0; + unsigned char maskG = 0; + unsigned char maskB = 0; + + // printf("Created bitmap %d\n", (int) hBitmap); + if (hBitmap == NULL) + { + ::ReleaseDC(NULL, hScreenDC); + return FALSE; + } + HDC hMemDC = ::CreateCompatibleDC(hScreenDC); + + HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap); + ::ReleaseDC(NULL, hScreenDC); + + // created an mono-bitmap for the possible mask + bool hasMask = image.HasMask(); + + if ( hasMask ) + { +#if USE_MASKS + // FIXME: we should be able to pass bpp = 1, but + // GdBlit can't handle a different depth +#if 0 + hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL ); #else - return FALSE; + hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight()); +#endif + maskR = image.GetMaskRed(); + maskG = image.GetMaskGreen(); + maskB = image.GetMaskBlue(); + + if (!hMaskBitmap) + { + hasMask = FALSE; + } + else + { + hScreenDC = ::GetDC(NULL); + hMaskDC = ::CreateCompatibleDC(hScreenDC); + ::ReleaseDC(NULL, hScreenDC); + + hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap); + } +#else + hasMask = FALSE; #endif + } + + int i, j; + for (i = 0; i < image.GetWidth(); i++) + { + for (j = 0; j < image.GetHeight(); j++) + { + unsigned char red = image.GetRed(i, j); + unsigned char green = image.GetGreen(i, j); + unsigned char blue = image.GetBlue(i, j); + + ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue)); + + if (hasMask) + { + // scan the bitmap for the transparent colour and set the corresponding + // pixels in the mask to BLACK and the rest to WHITE + if (maskR == red && maskG == green && maskB == blue) + ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0)); + else + ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255)); + } + } + } + + ::SelectObject(hMemDC, hOldBitmap); + ::DeleteDC(hMemDC); + if (hasMask) + { + ::SelectObject(hMaskDC, hOldMaskBitmap); + ::DeleteDC(hMaskDC); + + ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap); + } + + SetWidth(image.GetWidth()); + SetHeight(image.GetHeight()); + SetDepth(screenDepth); + SetHBITMAP( (WXHBITMAP) hBitmap ); + +#if wxUSE_PALETTE + // Copy the palette from the source image + SetPalette(image.GetPalette()); +#endif // wxUSE_PALETTE + + return TRUE; +} + +wxImage wxBitmap::ConvertToImage() const +{ + // Initial attempt at a simple-minded implementation. + // The bitmap will always be created at the screen depth, + // so the 'depth' argument is ignored. + // TODO: transparency (create a mask image) + + if (!Ok()) + { + wxFAIL_MSG( wxT("bitmap is invalid") ); + return wxNullImage; + } + + wxImage image; + + wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") ); + + // create an wxImage object + int width = GetWidth(); + int height = GetHeight(); + image.Create( width, height ); + unsigned char *data = image.GetData(); + if( !data ) + { + wxFAIL_MSG( wxT("could not allocate data for image") ); + return wxNullImage; + } + + HDC hScreenDC = ::GetDC(NULL); + + HDC hMemDC = ::CreateCompatibleDC(hScreenDC); + ::ReleaseDC(NULL, hScreenDC); + + HBITMAP hBitmap = (HBITMAP) GetHBITMAP(); + + HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap); + + int i, j; + for (i = 0; i < GetWidth(); i++) + { + for (j = 0; j < GetHeight(); j++) + { + COLORREF color = ::GetPixel(hMemDC, i, j); + unsigned char red = GetRValue(color); + unsigned char green = GetGValue(color); + unsigned char blue = GetBValue(color); + + image.SetRGB(i, j, red, green, blue); + } + } + + ::SelectObject(hMemDC, hOldBitmap); + ::DeleteDC(hMemDC); + +#if wxUSE_PALETTE + // Copy the palette from the source image + if (GetPalette()) + image.SetPalette(* GetPalette()); +#endif // wxUSE_PALETTE + + return image; } +#endif // __WXMICROWIN__ + // ---------------------------------------------------------------------------- // wxImage to/from conversions // ---------------------------------------------------------------------------- -#if wxUSE_IMAGE +bool wxBitmap::CreateFromImage(const wxImage& image, int depth) +{ + return CreateFromImage(image, depth, 0); +} -bool wxBitmap::CreateFromImage( const wxImage& image, int depth ) +bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc) { -#ifdef __WXMICROWIN__ - // TODO - return FALSE; -#else - wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") ) + wxCHECK_MSG( dc.Ok(), FALSE, + _T("invalid HDC in wxBitmap::CreateFromImage()") ); - m_refData = new wxBitmapRefData(); + return CreateFromImage(image, -1, dc.GetHDC()); +} + +bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc ) +{ +#if wxUSE_WXDIB + wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") ); + + UnRef(); + + // first convert the image to DIB + const int h = image.GetHeight(); + const int w = image.GetWidth(); + + wxDIB dib(image); + if ( !dib.IsOk() ) + return FALSE; + + + // store the bitmap parameters + wxBitmapRefData *refData = new wxBitmapRefData; + refData->m_width = w; + refData->m_height = h; + refData->m_hasAlpha = image.HasAlpha(); + + m_refData = refData; + + + // next either store DIB as is or create a DDB from it + HBITMAP hbitmap; + + // are we going to use DIB? + // + // NB: DDBs don't support alpha so if we have alpha channel we must use DIB + if ( image.HasAlpha() || wxShouldCreateDIB(w, h, depth, hdc) ) + { + // don't delete the DIB section in dib object dtor + hbitmap = dib.Detach(); + + refData->m_isDIB = TRUE; + refData->m_depth = dib.GetDepth(); + } + else // we need to convert DIB to DDB + { + hbitmap = dib.CreateDDB((HDC)hdc); - // sizeLimit is the MS upper limit for the DIB size -#ifdef WIN32 - int sizeLimit = 1024*768*3; + refData->m_depth = depth == -1 ? wxDisplayDepth() : depth; + } + + // validate this object + SetHBITMAP((WXHBITMAP)hbitmap); + + // finally also set the mask if we have one + if ( image.HasMask() ) + { + SetMask(new wxMask(*this, wxColour(image.GetMaskRed(), + image.GetMaskGreen(), + image.GetMaskBlue()))); + } + + return TRUE; #else - int sizeLimit = 0x7fff ; + // FIXME: wxWinCE doesn't support wxDIB yet + return FALSE; #endif +} + +wxImage wxBitmap::ConvertToImage() const +{ + // FIXME: this is untested code for WinCE, and + // the mask is not yet handled. + // For tips, see: + // http://www.codeproject.com/bitmap/dibsection.asp?print=true + +#ifdef __WXWINCE__ + // the colour used as transparent one in wxImage and the one it is replaced + // with when it really occurs in the bitmap + static const int MASK_RED = 1; + static const int MASK_GREEN = 2; + static const int MASK_BLUE = 3; + static const int MASK_BLUE_REPLACEMENT = 2; + + wxImage image; + + wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") ); - // width and height of the device-dependent bitmap - int width = image.GetWidth(); - int bmpHeight = image.GetHeight(); + // create an wxImage object + int width = GetWidth(); + int height = GetHeight(); + image.Create( width, height ); + unsigned char *data = image.GetData(); + if( !data ) + { + wxFAIL_MSG( wxT("could not allocate data for image") ); + return wxNullImage; + } - // calc the number of bytes per scanline and padding + // calc the number of bytes per scanline and padding in the DIB int bytePerLine = width*3; int sizeDWORD = sizeof( DWORD ); - int lineBoundary = bytePerLine % sizeDWORD; + int lineBoundary = bytePerLine % sizeDWORD; int padding = 0; if( lineBoundary > 0 ) { padding = sizeDWORD - lineBoundary; bytePerLine += padding; } - // calc the number of DIBs and heights of DIBs - int numDIB = 1; - int hRemain = 0; - int height = sizeLimit/bytePerLine; - if( height >= bmpHeight ) - height = bmpHeight; - else - { - numDIB = bmpHeight / height; - hRemain = bmpHeight % height; - if( hRemain >0 ) numDIB++; - } - - // set bitmap parameters - wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") ); - SetWidth( width ); - SetHeight( bmpHeight ); - if (depth == -1) depth = wxDisplayDepth(); - SetDepth( depth ); - - // Copy the palette from the source image - SetPalette(image.GetPalette()); // create a DIB header int headersize = sizeof(BITMAPINFOHEADER); BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize ); - wxCHECK_MSG( lpDIBh, FALSE, wxT("could not allocate memory for DIB header") ); + if( !lpDIBh ) + { + wxFAIL_MSG( wxT("could not allocate data for DIB header") ); + free( data ); + return wxNullImage; + } // Fill in the DIB header lpDIBh->bmiHeader.biSize = headersize; - lpDIBh->bmiHeader.biWidth = (DWORD)width; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - // the general formula for biSizeImage: - // ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height; + lpDIBh->bmiHeader.biWidth = width; + lpDIBh->bmiHeader.biHeight = -height; + lpDIBh->bmiHeader.biSizeImage = bytePerLine * height; lpDIBh->bmiHeader.biPlanes = 1; lpDIBh->bmiHeader.biBitCount = 24; lpDIBh->bmiHeader.biCompression = BI_RGB; @@ -453,177 +886,144 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth ) lpDIBh->bmiHeader.biClrImportant = 0; lpDIBh->bmiHeader.biXPelsPerMeter = 0; lpDIBh->bmiHeader.biYPelsPerMeter = 0; - // memory for DIB data - unsigned char *lpBits; - lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage ); - if( !lpBits ) + + // memory for DIB data is allocated by CreateDIBSection + void *lpBits = NULL; + + // copy data from the device-dependent bitmap to the DIB + HDC hdc = ::GetDC(NULL); + HBITMAP hBitmap = (HBITMAP) GetHBITMAP(); + + HBITMAP hBitmapSection = ::CreateDIBSection( hdc, lpDIBh, DIB_RGB_COLORS, & lpBits, NULL, 0 ); + if (!hBitmapSection) { - wxFAIL_MSG( wxT("could not allocate memory for DIB") ); - free( lpDIBh ); - return FALSE; + wxFAIL_MSG( wxT("could not create a DIB section") ); + return wxNullImage; } - // create and set the device-dependent bitmap - HDC hdc = ::GetDC(NULL); - HDC memdc = ::CreateCompatibleDC( hdc ); - HBITMAP hbitmap; - hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight ); - ::SelectObject( memdc, hbitmap); + // Copy the image from the DDB to the DIBSection + // Need to copy the supplied bitmap onto the newly created DIBsection + HDC hMemDC = CreateCompatibleDC(hdc); + HDC hCopyDC = CreateCompatibleDC(hdc); + + if (! hMemDC || ! hCopyDC) + { + wxFAIL_MSG( wxT("unable to create compatible DCs") ); + return wxNullImage; + } -#if wxUSE_PALETTE - HPALETTE hOldPalette = 0; - if (image.GetPalette().Ok()) +#if 0 + if (m_hPal) { - hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE); - ::RealizePalette(memdc); + SelectPalette(hMemDC, m_hPal, FALSE); RealizePalette(hMemDC); + SelectPalette(hCopyDC, m_hPal, FALSE); RealizePalette(hCopyDC); } -#endif // wxUSE_PALETTE +#endif - // copy image data into DIB data and then into DDB (in a loop) - unsigned char *data = image.GetData(); - int i, j, n; - int origin = 0; - unsigned char *ptdata = data; - unsigned char *ptbits; + HBITMAP hOldMemBitmap = (HBITMAP) SelectObject(hMemDC, hBitmap); + HBITMAP hOldCopyBitmap = (HBITMAP) SelectObject(hCopyDC, hBitmapSection); + + BitBlt(hCopyDC, 0, 0, GetWidth(), GetHeight(), hMemDC, 0, 0, SRCCOPY); + + SelectObject(hMemDC, hOldMemBitmap); + SelectObject(hCopyDC, hOldCopyBitmap); + DeleteDC(hMemDC); + DeleteDC(hCopyDC); - for( n=0; n 1 && n == numDIB-1 && hRemain > 0 ) - { - // redefine height and size of the (possibly) last smaller DIB - // memory is not reallocated - height = hRemain; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - } - ptbits = lpBits; + HGDIOBJ hObj = ::GetStockObject(DEFAULT_PALETTE); + SelectObject(hMemDC, hObj); + SelectObject(hCopyDC, hObj); + } +#endif + + ReleaseDC(NULL, hdc); - for( j=0; jbmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS ); - // The above line is equivalent to the following two lines. - // hbitmap = ::CreateCompatibleBitmap( hdc, width, height ); - // ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS); - // or the following lines - // hbitmap = ::CreateCompatibleBitmap( hdc, width, height ); - // HDC memdc = ::CreateCompatibleDC( hdc ); - // ::SelectObject( memdc, hbitmap); - // ::SetDIBitsToDevice( memdc, 0, 0, width, height, - // 0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS); - // ::SelectObject( memdc, 0 ); - // ::DeleteDC( memdc ); - } - SetHBITMAP( (WXHBITMAP) hbitmap ); - -#if wxUSE_PALETTE - if (hOldPalette) - SelectPalette(memdc, hOldPalette, FALSE); -#endif // wxUSE_PALETTE + ptbits += padding; + } - // similarly, created an mono-bitmap for the possible mask - if( image.HasMask() ) - { - hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL ); - HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap); - if( numDIB == 1 ) height = bmpHeight; - else height = sizeLimit/bytePerLine; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - origin = 0; - unsigned char r = image.GetMaskRed(); - unsigned char g = image.GetMaskGreen(); - unsigned char b = image.GetMaskBlue(); - unsigned char zero = 0, one = 255; + // TODO +#if 0 + // similarly, set data according to the possible mask bitmap + if( GetMask() && GetMask()->GetMaskBitmap() ) + { + hbitmap = (HBITMAP) GetMask()->GetMaskBitmap(); + // memory DC created, color set, data copied, and memory DC deleted + HDC memdc = ::CreateCompatibleDC( hdc ); + ::SetTextColor( memdc, RGB( 0, 0, 0 ) ); + ::SetBkColor( memdc, RGB( 255, 255, 255 ) ); + ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); + ::DeleteDC( memdc ); ptdata = data; - for( n=0; n 1 && n == numDIB - 1 && hRemain > 0 ) - { - // redefine height and size of the (possibly) last smaller DIB - // memory is not reallocated - height = hRemain; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - } - ptbits = lpBits; - for( int j=0; jSetMaskBitmap( (WXHBITMAP) hbitmap ); - SetMask( mask ); - // It will be deleted when the wxBitmap object is deleted (as of 01/1999) - /* The following can also be used but is slow to run - wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue()); - wxMask *mask = new wxMask( *this, colour ); - SetMask( mask ); - */ - ::SelectObject( memdc, hbmpOld ); + image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE ); + image.SetMask( TRUE ); + } + else +#endif + { + image.SetMask( FALSE ); } // free allocated resources - ::DeleteDC( memdc ); ::ReleaseDC(NULL, hdc); free(lpDIBh); - free(lpBits); - -#if WXWIN_COMPATIBILITY_2 - // check the wxBitmap object - GetBitmapData()->SetOk(); -#endif // WXWIN_COMPATIBILITY_2 - - if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this); - return TRUE; -#endif -} + // Delete the DIB section + ::DeleteObject(hBitmapSection); -wxImage wxBitmap::ConvertToImage() const -{ -#ifdef __WXMICROWIN__ - // TODO - return wxImage(); + return image; #else + // the colour used as transparent one in wxImage and the one it is replaced + // with when it really occurs in the bitmap + static const int MASK_RED = 1; + static const int MASK_GREEN = 2; + static const int MASK_BLUE = 3; + static const int MASK_BLUE_REPLACEMENT = 2; + wxImage image; wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") ); @@ -715,27 +1115,37 @@ wxImage wxBitmap::ConvertToImage() const ::SetBkColor( memdc, RGB( 255, 255, 255 ) ); ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); ::DeleteDC( memdc ); - // background color set to RGB(16,16,16) in consistent with wxGTK - unsigned char r=16, g=16, b=16; ptdata = data; ptbits = lpBits; for( i=0; i= 0) && (rect.y >= 0) && (rect.x+rect.width <= GetWidth()) && (rect.y+rect.height <= GetHeight()), wxNullBitmap, wxT("Invalid bitmap or bitmap region") ); - wxBitmap ret( rect.width, rect.height, GetDepth() ); + wxBitmap ret( rect.width, rect.height ); wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") ); +#ifndef __WXMICROWIN__ + // TODO: copy alpha channel data if any + // copy bitmap data - HDC dcSrc = ::CreateCompatibleDC(NULL); - HDC dcDst = ::CreateCompatibleDC(NULL); - SelectObject(dcSrc, (HBITMAP) GetHBITMAP()); - SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP()); - BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY); + MemoryHDC dcSrc, + dcDst; + + { + SelectInHDC selectSrc(dcSrc, GetHbitmap()), + selectDst(dcDst, GetHbitmapOf(ret)); + + if ( !selectSrc || !selectDst ) + { + wxLogLastError(_T("SelectObjct(hBitmap)")); + } + + if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height, + dcSrc, rect.x, rect.y, SRCCOPY) ) + { + wxLogLastError(_T("BitBlt")); + } + } // copy mask if there is one - if (GetMask()) + if ( GetMask() ) { HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0); - SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()); - SelectObject(dcDst, (HBITMAP) hbmpMask); - BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY); + SelectInHDC selectSrc(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()), + selectDst(dcDst, hbmpMask); + + if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height, + dcSrc, rect.x, rect.y, SRCCOPY) ) + { + wxLogLastError(_T("BitBlt")); + } wxMask *mask = new wxMask((WXHBITMAP) hbmpMask); ret.SetMask(mask); } - - SelectObject(dcDst, NULL); - SelectObject(dcSrc, NULL); - DeleteDC(dcDst); - DeleteDC(dcSrc); +#endif // !__WXMICROWIN__ return ret; -#else - return wxBitmap(); -#endif } // ---------------------------------------------------------------------------- // wxBitmap accessors // ---------------------------------------------------------------------------- -void wxBitmap::SetQuality(int q) +#if wxUSE_PALETTE +wxPalette* wxBitmap::GetPalette() const { - EnsureHasData(); + return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette + : (wxPalette *) NULL; +} +#endif - GetBitmapData()->m_quality = q; +wxMask *wxBitmap::GetMask() const +{ + return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL; } -#if WXWIN_COMPATIBILITY_2 -void wxBitmap::SetOk(bool isOk) +#ifdef __WXDEBUG__ + +wxDC *wxBitmap::GetSelectedInto() const { - EnsureHasData(); + return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL; +} + +#endif + +#if WXWIN_COMPATIBILITY_2_4 + +int wxBitmap::GetQuality() const +{ + return 0; +} + +#endif // WXWIN_COMPATIBILITY_2_4 - GetBitmapData()->m_ok = isOk; +void wxBitmap::UseAlpha() +{ + if ( GetBitmapData() ) + GetBitmapData()->m_hasAlpha = true; +} + +bool wxBitmap::HasAlpha() const +{ + return GetBitmapData() && GetBitmapData()->m_hasAlpha; +} + +// ---------------------------------------------------------------------------- +// wxBitmap setters +// ---------------------------------------------------------------------------- + +#ifdef __WXDEBUG__ + +void wxBitmap::SetSelectedInto(wxDC *dc) +{ + if ( GetBitmapData() ) + GetBitmapData()->m_selectedInto = dc; } -#endif // WXWIN_COMPATIBILITY_2 + +#endif #if wxUSE_PALETTE @@ -906,69 +1373,160 @@ void wxBitmap::SetMask(wxMask *mask) { EnsureHasData(); - GetBitmapData()->m_bitmapMask = mask; + GetBitmapData()->SetMask(mask); } -// Creates a bitmap that matches the device context, from -// an arbitray bitmap. At present, the original bitmap must have an -// associated palette. TODO: use a default palette if no palette exists. -// Contributed by Frederic Villeneuve -wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const +#if WXWIN_COMPATIBILITY_2_4 + +void wxBitmap::SetQuality(int WXUNUSED(quality)) { -#ifdef __WXMICROWIN__ - return wxBitmap(); -#else - wxMemoryDC memDC; - wxBitmap tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth()); - HPALETTE hPal = (HPALETTE) NULL; - LPBITMAPINFO lpDib; - void *lpBits = (void*) NULL; +} -#if wxUSE_PALETTE - if( GetPalette() && GetPalette()->Ok() ) +#endif // WXWIN_COMPATIBILITY_2_4 + +// ---------------------------------------------------------------------------- +// raw bitmap access support +// ---------------------------------------------------------------------------- + +#ifdef wxHAVE_RAW_BITMAP +void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp) +{ +#if wxUSE_WXDIB + if ( !Ok() ) { - tmpBitmap.SetPalette(*GetPalette()); - memDC.SelectObject(tmpBitmap); - memDC.SetPalette(*GetPalette()); - hPal = (HPALETTE)GetPalette()->GetHPALETTE(); + // no bitmap, no data (raw or otherwise) + return NULL; } - else + + // if we're already a DIB we can access our data directly, but if not we + // need to convert this DDB to a DIB section and use it for raw access and + // then convert it back + HBITMAP hDIB; + if ( !GetBitmapData()->m_isDIB ) + { + wxCHECK_MSG( !GetBitmapData()->m_dib, FALSE, + _T("GetRawData() may be called only once") ); + + wxDIB *dib = new wxDIB(*this); + if ( !dib->IsOk() ) + { + delete dib; + + return NULL; + } + + // we'll free it in UngetRawData() + GetBitmapData()->m_dib = dib; + + hDIB = dib->GetHandle(); + } + else // we're a DIB { - hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE); - wxPalette palette; - palette.SetHPALETTE( (WXHPALETTE)hPal ); - tmpBitmap.SetPalette( palette ); - memDC.SelectObject(tmpBitmap); - memDC.SetPalette( palette ); + hDIB = GetHbitmap(); } -#else // !wxUSE_PALETTE - hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE); -#endif // wxUSE_PALETTE/!wxUSE_PALETTE - // set the height negative because in a DIB the order of the lines is - // reversed - if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) ) + DIBSECTION ds; + if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) ) { - return wxNullBitmap; + wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") ); + + return NULL; } - lpBits = malloc(lpDib->bmiHeader.biSizeImage); + // check that the bitmap is in correct format + if ( ds.dsBm.bmBitsPixel != bpp ) + { + wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") ); + + return NULL; + } - ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits); + // ok, store the relevant info in wxPixelDataBase + const LONG h = ds.dsBm.bmHeight; - ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0, - GetWidth(), GetHeight(), - 0, 0, 0, GetHeight(), - lpBits, lpDib, DIB_RGB_COLORS); + data.m_width = ds.dsBm.bmWidth; + data.m_height = h; - free(lpBits); + // remember that DIBs are stored in top to bottom order! + const LONG bytesPerRow = ds.dsBm.bmWidthBytes; + data.m_stride = -bytesPerRow; - wxFreeDIB(lpDib); + char *bits = (char *)ds.dsBm.bmBits; + if ( h > 1 ) + { + bits += (h - 1)*bytesPerRow; + } - return tmpBitmap; + return bits; +#else + return NULL; #endif } +void wxBitmap::UngetRawData(wxPixelDataBase& dataBase) +{ +#if wxUSE_WXDIB + if ( !Ok() ) + return; + + // the cast is ugly but we can't do without it and without making this + // function template (and hence inline) unfortunately + typedef wxPixelData PixelData; + PixelData& data = (PixelData &)dataBase; + + if ( !data ) + { + // invalid data, don't crash -- but don't assert neither as we're + // called automatically from wxPixelDataBase dtor and so there is no + // way to prevent this from happening + return; + } + + if ( GetBitmapData()->m_hasAlpha ) + { + // AlphaBlend() wants to have premultiplied source alpha but + // wxRawBitmap API uses normal, not premultiplied, colours, so adjust + // them here now + PixelData::Iterator p(data); + + const int w = data.GetWidth(); + const int h = data.GetHeight(); + + for ( int y = 0; y < h; y++ ) + { + PixelData::Iterator rowStart = p; + + for ( int x = 0; x < w; x++ ) + { + const unsigned alpha = p.Alpha(); + + p.Red() = (p.Red() * alpha + 127) / 255; + p.Blue() = (p.Blue() * alpha + 127) / 255; + p.Green() = (p.Green() * alpha + 127) / 255; + + ++p; + } + + p = rowStart; + p.OffsetY(data, 1); + } + } + + // if we're a DDB we need to convert DIB back to DDB now to make the + // changes made via raw bitmap access effective + if ( !GetBitmapData()->m_isDIB ) + { + wxDIB *dib = GetBitmapData()->m_dib; + GetBitmapData()->m_dib = NULL; + + // TODO: convert + + delete dib; + } +#endif // wxUSE_WXDIB +} +#endif // #ifdef wxHAVE_RAW_BITMAP + // ---------------------------------------------------------------------------- // wxMask // ---------------------------------------------------------------------------- @@ -1083,7 +1641,7 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour) // scan the bitmap for the transparent colour and set the corresponding // pixels in the mask to BLACK and the rest to WHITE - COLORREF maskColour = wxColourToRGB(colour); + COLORREF maskColour = wxColourToPalRGB(colour); m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0); HDC srcDC = ::CreateCompatibleDC(NULL); @@ -1115,32 +1673,13 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour) ok = FALSE; } - // this is not very efficient, but I can't think of a better way of doing - // it - for ( int w = 0; ok && (w < width); w++ ) + if ( ok ) { - for ( int h = 0; ok && (h < height); h++ ) - { - COLORREF col = GetPixel(srcDC, w, h); - if ( col == CLR_INVALID ) - { - wxLogLastError(wxT("GetPixel")); - - // doesn't make sense to continue - ok = FALSE; - - break; - } - - if ( col == maskColour ) - { - ::SetPixel(destDC, w, h, RGB(0, 0, 0)); - } - else - { - ::SetPixel(destDC, w, h, RGB(255, 255, 255)); - } - } + // this will create a monochrome bitmap with 0 points for the pixels + // which have the same value as the background colour and 1 for the + // others + ::SetBkColor(srcDC, maskColour); + ::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, NOTSRCCOPY); } ::SelectObject(srcDC, hbmpSrcOld); @@ -1149,9 +1688,9 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour) ::DeleteDC(destDC); return ok; -#else +#else // __WXMICROWIN__ return FALSE; -#endif +#endif // __WXMICROWIN__/!__WXMICROWIN__ } // ---------------------------------------------------------------------------- @@ -1223,14 +1762,11 @@ bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel, HPALETTE hPal, LPBITMAPINFO* lpDIBHeader) { unsigned long i, headerSize; - LPBITMAPINFO lpDIBheader = NULL; - LPPALETTEENTRY lpPe = NULL; - // Allocate space for a DIB header headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY))); - lpDIBheader = (BITMAPINFO *) malloc(headerSize); - lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER)); + LPBITMAPINFO lpDIBheader = (BITMAPINFO *) malloc(headerSize); + LPPALETTEENTRY lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER)); GetPaletteEntries(hPal, 0, 256, lpPe); @@ -1269,10 +1805,82 @@ void wxFreeDIB(LPBITMAPINFO lpDIBHeader) #endif // ---------------------------------------------------------------------------- -// other helper functions +// global helper functions implemented here // ---------------------------------------------------------------------------- -extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h) +// helper of wxBitmapToHICON/HCURSOR +static +HICON wxBitmapToIconOrCursor(const wxBitmap& bmp, + bool iconWanted, + int hotSpotX, + int hotSpotY) +{ + if ( !bmp.Ok() ) + { + // we can't create an icon/cursor form nothing + return 0; + } + + wxMask *mask = bmp.GetMask(); + if ( !mask ) + { + // we must have a mask for an icon, so even if it's probably incorrect, + // do create it (grey is the "standard" transparent colour) + mask = new wxMask(bmp, *wxLIGHT_GREY); + } + + ICONINFO iconInfo; + wxZeroMemory(iconInfo); + iconInfo.fIcon = iconWanted; // do we want an icon or a cursor? + if ( !iconWanted ) + { + iconInfo.xHotspot = hotSpotX; + iconInfo.yHotspot = hotSpotY; + } + + iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap()); + iconInfo.hbmColor = GetHbitmapOf(bmp); + + // black out the transparent area to preserve background colour, because + // Windows blits the original bitmap using SRCINVERT (XOR) after applying + // the mask to the dest rect. + { + MemoryHDC dcSrc, dcDst; + SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()), + selectBitmap(dcDst, iconInfo.hbmColor); + + if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(), + dcSrc, 0, 0, SRCAND) ) + { + wxLogLastError(_T("BitBlt")); + } + } + + HICON hicon = ::CreateIconIndirect(&iconInfo); + + if ( !bmp.GetMask() ) + { + // we created the mask, now delete it + delete mask; + } + + // delete the inverted mask bitmap we created as well + ::DeleteObject(iconInfo.hbmMask); + + return hicon; +} + +HICON wxBitmapToHICON(const wxBitmap& bmp) +{ + return wxBitmapToIconOrCursor(bmp, TRUE, 0, 0); +} + +HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY) +{ + return (HCURSOR)wxBitmapToIconOrCursor(bmp, FALSE, hotSpotX, hotSpotY); +} + +HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h) { #ifndef __WXMICROWIN__ wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") ); @@ -1299,8 +1907,8 @@ extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h) wxLogLastError(wxT("CreateBitmap")); } - ::SelectObject(hdcSrc, hbmpMask); - ::SelectObject(hdcDst, hbmpInvMask); + HGDIOBJ srcTmp = ::SelectObject(hdcSrc, hbmpMask); + HGDIOBJ dstTmp = ::SelectObject(hdcDst, hbmpInvMask); if ( !::BitBlt(hdcDst, 0, 0, w, h, hdcSrc, 0, 0, NOTSRCCOPY) ) @@ -1308,6 +1916,10 @@ extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h) wxLogLastError(wxT("BitBlt")); } + // Deselect objects + SelectObject(hdcSrc,srcTmp); + SelectObject(hdcDst,dstTmp); + ::DeleteDC(hdcSrc); ::DeleteDC(hdcDst);