//////////////////////////////////////////////////////////////////////////// // Name: bitmap.cpp // Purpose: wxBitmap // Author: Julian Smart // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ // Copyright: (c) Julian Smart // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ // declarations // ============================================================================ // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "bitmap.h" #endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WX_PRECOMP #include #include "wx/list.h" #include "wx/utils.h" #include "wx/app.h" #include "wx/palette.h" #include "wx/dcmemory.h" #include "wx/bitmap.h" #include "wx/icon.h" #endif #include "wx/msw/private.h" #include "wx/log.h" #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 // ---------------------------------------------------------------------------- IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject) IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject) 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() { #ifdef __WXDEBUG__ m_selectedInto = NULL; #endif m_bitmapMask = NULL; m_hBitmap = (WXHBITMAP) NULL; #if wxUSE_WXDIB m_dib = NULL; #endif m_isDIB = m_hasAlpha = FALSE; } 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) ) { wxLogLastError(wxT("DeleteObject(hbitmap)")); } } delete m_bitmapMask; m_bitmapMask = NULL; } // ---------------------------------------------------------------------------- // wxBitmap creation // ---------------------------------------------------------------------------- // this function should be called from all wxBitmap ctors void wxBitmap::Init() { // m_refData = NULL; done in the base class ctor } wxGDIImageRefData *wxBitmap::CreateData() const { return new wxBitmapRefData; } #ifdef __WIN32__ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon) { #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) // it may be either HICON or HCURSOR HICON hicon = (HICON)icon.GetHandle(); ICONINFO iconInfo; if ( !::GetIconInfo(hicon, &iconInfo) ) { wxLogLastError(wxT("GetIconInfo")); return FALSE; } wxBitmapRefData *refData = new wxBitmapRefData; m_refData = refData; int w = icon.GetWidth(), h = icon.GetHeight(); refData->m_width = w; refData->m_height = h; refData->m_depth = wxDisplayDepth(); refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor; // the mask returned by GetIconInfo() is inversed compared to the usual // wxWin convention refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h)); // delete the old one now as we don't need it any more ::DeleteObject(iconInfo.hbmMask); return TRUE; #else return FALSE; #endif } #endif // Win32 bool wxBitmap::CopyFromCursor(const wxCursor& cursor) { UnRef(); if ( !cursor.Ok() ) return FALSE; #ifdef __WIN16__ wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") ); return FALSE; #else return CopyFromIconOrCursor(cursor); #endif // Win16 } bool wxBitmap::CopyFromIcon(const wxIcon& icon) { UnRef(); if ( !icon.Ok() ) return FALSE; // GetIconInfo() doesn't exist under Win16 and I don't know any other way // to create a bitmap from icon there - but using this way we won't have // the mask (FIXME) #ifdef __WIN16__ int width = icon.GetWidth(), height = icon.GetHeight(); // copy the icon to the bitmap ScreenHDC hdcScreen; HDC hdc = ::CreateCompatibleDC(hdcScreen); HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height); HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap); ::DrawIcon(hdc, 0, 0, GetHiconOf(icon)); ::SelectObject(hdc, hbmpOld); ::DeleteDC(hdc); wxBitmapRefData *refData = new wxBitmapRefData; m_refData = refData; refData->m_width = width; refData->m_height = height; refData->m_depth = wxDisplayDepth(); refData->m_hBitmap = (WXHBITMAP)hbitmap; 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() { } wxBitmap::wxBitmap(const char bits[], int width, int height, int depth) { Init(); #ifndef __WXMICROWIN__ wxBitmapRefData *refData = new wxBitmapRefData; m_refData = refData; refData->m_width = width; refData->m_height = height; refData->m_depth = depth; char *data; if ( depth == 1 ) { // we assume that it is in XBM format which is not quite the same as // the format CreateBitmap() wants because the order of bytes in the // line is inversed! const size_t bytesPerLine = (width + 7) / 8; const size_t padding = bytesPerLine % 2; const size_t len = height * ( padding + bytesPerLine ); data = (char *)malloc(len); const char *src = bits; char *dst = data; for ( int rows = 0; rows < height; rows++ ) { for ( size_t cols = 0; cols < bytesPerLine; cols++ ) { unsigned char val = *src++; unsigned char reversed = 0; for ( int bits = 0; bits < 8; bits++) { reversed <<= 1; reversed |= (val & 0x01); val >>= 1; } *dst++ = reversed; } if ( padding ) *dst++ = 0; } } else { // bits should already be in Windows standard format data = (char *)bits; // const_cast is harmless } HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data); if ( !hbmp ) { wxLogLastError(wxT("CreateBitmap")); } if ( data != bits ) { free(data); } SetHBITMAP((WXHBITMAP)hbmp); #endif } // Create from XPM data bool wxBitmap::CreateFromXpm(const char **data) { #if wxUSE_IMAGE && wxUSE_XPM Init(); wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") ) wxXPMDecoder decoder; wxImage img = decoder.ReadData(data); wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") ) *this = wxBitmap(img); return TRUE; #else return FALSE; #endif } wxBitmap::wxBitmap(int w, int h, int d) { Init(); (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(); (void)Create(data, type, width, height, depth); } wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type) { Init(); LoadFile(filename, (int)type); } 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) { UnRef(); m_refData = new wxBitmapRefData; GetBitmapData()->m_width = w; GetBitmapData()->m_height = h; HBITMAP hbmp; #if wxUSE_WXDIB if ( wxShouldCreateDIB(w, h, d, hdc) ) { if ( d == -1 ) { // 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 // create a DDB #endif { if ( d == -1 ) d = wxDisplayDepth(); GetBitmapData()->m_depth = d; #ifndef __WXMICROWIN__ if ( d > 0 ) { 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(); } } SetHBITMAP((WXHBITMAP)hbmp); 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 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 // ---------------------------------------------------------------------------- bool wxBitmap::CreateFromImage(const wxImage& image, int depth) { return CreateFromImage(image, depth, 0); } bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc) { wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::CreateFromImage()") ); 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); 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 // 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") ); // 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 in the DIB int bytePerLine = width*3; int sizeDWORD = sizeof( DWORD ); int lineBoundary = bytePerLine % sizeDWORD; int padding = 0; if( lineBoundary > 0 ) { padding = sizeDWORD - lineBoundary; bytePerLine += padding; } // create a DIB header int headersize = sizeof(BITMAPINFOHEADER); BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize ); 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 = width; lpDIBh->bmiHeader.biHeight = -height; lpDIBh->bmiHeader.biSizeImage = bytePerLine * height; lpDIBh->bmiHeader.biPlanes = 1; lpDIBh->bmiHeader.biBitCount = 24; lpDIBh->bmiHeader.biCompression = BI_RGB; lpDIBh->bmiHeader.biClrUsed = 0; // These seem not really needed for our purpose here. lpDIBh->bmiHeader.biClrImportant = 0; lpDIBh->bmiHeader.biXPelsPerMeter = 0; lpDIBh->bmiHeader.biYPelsPerMeter = 0; // 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 create a DIB section") ); return wxNullImage; } // 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 0 if (m_hPal) { SelectPalette(hMemDC, m_hPal, FALSE); RealizePalette(hMemDC); SelectPalette(hCopyDC, m_hPal, FALSE); RealizePalette(hCopyDC); } #endif 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); #if 0 if (m_hPal) { HGDIOBJ hObj = ::GetStockObject(DEFAULT_PALETTE); SelectObject(hMemDC, hObj); SelectObject(hCopyDC, hObj); } #endif ReleaseDC(NULL, hdc); // copy DIB data into the wxImage object int i, j; unsigned char *ptdata = data; unsigned char *ptbits = (unsigned char*) lpBits; for( i=0; iGetMaskBitmap() ) { 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; ptbits = lpBits; for( i=0; i 0 ) { padding = sizeDWORD - lineBoundary; bytePerLine += padding; } // create a DIB header int headersize = sizeof(BITMAPINFOHEADER); BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize ); 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 = width; lpDIBh->bmiHeader.biHeight = -height; lpDIBh->bmiHeader.biSizeImage = bytePerLine * height; lpDIBh->bmiHeader.biPlanes = 1; lpDIBh->bmiHeader.biBitCount = 24; lpDIBh->bmiHeader.biCompression = BI_RGB; lpDIBh->bmiHeader.biClrUsed = 0; // These seem not really needed for our purpose here. 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 ) { wxFAIL_MSG( wxT("could not allocate data for DIB") ); free( data ); free( lpDIBh ); return wxNullImage; } // copy data from the device-dependent bitmap to the DIB HDC hdc = ::GetDC(NULL); HBITMAP hbitmap; hbitmap = (HBITMAP) GetHBITMAP(); ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); // copy DIB data into the wxImage object int i, j; unsigned char *ptdata = data; unsigned char *ptbits = lpBits; for( i=0; iGetMaskBitmap() ) { 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; ptbits = lpBits; for( i=0; iLoadFile(this, filename, type, -1, -1); } #if wxUSE_IMAGE else { wxImage image; if ( image.LoadFile( filename, type ) && image.Ok() ) { *this = wxBitmap(image); return TRUE; } } #endif // wxUSE_IMAGE return FALSE; } bool wxBitmap::Create(void *data, long type, int width, int height, int depth) { UnRef(); wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler); if ( !handler ) { wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type); return FALSE; } m_refData = new wxBitmapRefData; return handler->Create(this, data, type, width, height, depth); } bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette) { wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler); if ( handler ) { return handler->SaveFile(this, filename, type, palette); } #if wxUSE_IMAGE else { // FIXME what about palette? shouldn't we use it? wxImage image = ConvertToImage(); if ( image.Ok() ) { return image.SaveFile(filename, type); } } #endif // wxUSE_IMAGE return FALSE; } // ---------------------------------------------------------------------------- // sub bitmap extraction // ---------------------------------------------------------------------------- wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const { wxCHECK_MSG( Ok() && (rect.x >= 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 ); wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") ); #ifndef __WXMICROWIN__ // TODO: copy alpha channel data if any // copy bitmap data 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() ) { HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0); 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); } #endif // !__WXMICROWIN__ return ret; } // ---------------------------------------------------------------------------- // wxBitmap accessors // ---------------------------------------------------------------------------- #if wxUSE_PALETTE wxPalette* wxBitmap::GetPalette() const { return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette : (wxPalette *) NULL; } #endif wxMask *wxBitmap::GetMask() const { return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL; } #ifdef __WXDEBUG__ wxDC *wxBitmap::GetSelectedInto() const { return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL; } #endif #if WXWIN_COMPATIBILITY_2_4 int wxBitmap::GetQuality() const { return 0; } #endif // WXWIN_COMPATIBILITY_2_4 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 #if wxUSE_PALETTE void wxBitmap::SetPalette(const wxPalette& palette) { EnsureHasData(); GetBitmapData()->m_bitmapPalette = palette; } #endif // wxUSE_PALETTE void wxBitmap::SetMask(wxMask *mask) { EnsureHasData(); GetBitmapData()->SetMask(mask); } #if WXWIN_COMPATIBILITY_2_4 void wxBitmap::SetQuality(int WXUNUSED(quality)) { } #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() ) { // no bitmap, no data (raw or otherwise) return NULL; } // 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 { hDIB = GetHbitmap(); } DIBSECTION ds; if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) ) { wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") ); return NULL; } // check that the bitmap is in correct format if ( ds.dsBm.bmBitsPixel != bpp ) { wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") ); return NULL; } // ok, store the relevant info in wxPixelDataBase const LONG h = ds.dsBm.bmHeight; data.m_width = ds.dsBm.bmWidth; data.m_height = h; // remember that DIBs are stored in top to bottom order! const LONG bytesPerRow = ds.dsBm.bmWidthBytes; data.m_stride = -bytesPerRow; char *bits = (char *)ds.dsBm.bmBits; if ( h > 1 ) { bits += (h - 1)*bytesPerRow; } 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 } #endif // #ifdef wxHAVE_RAW_BITMAP // ---------------------------------------------------------------------------- // wxMask // ---------------------------------------------------------------------------- wxMask::wxMask() { m_maskBitmap = 0; } // Construct a mask from a bitmap and a colour indicating // the transparent area wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour) { m_maskBitmap = 0; Create(bitmap, colour); } // Construct a mask from a bitmap and a palette index indicating // the transparent area wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex) { m_maskBitmap = 0; Create(bitmap, paletteIndex); } // Construct a mask from a mono bitmap (copies the bitmap). wxMask::wxMask(const wxBitmap& bitmap) { m_maskBitmap = 0; Create(bitmap); } wxMask::~wxMask() { if ( m_maskBitmap ) ::DeleteObject((HBITMAP) m_maskBitmap); } // Create a mask from a mono bitmap (copies the bitmap). bool wxMask::Create(const wxBitmap& bitmap) { #ifndef __WXMICROWIN__ wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE, _T("can't create mask from invalid or not monochrome bitmap") ); if ( m_maskBitmap ) { ::DeleteObject((HBITMAP) m_maskBitmap); m_maskBitmap = 0; } m_maskBitmap = (WXHBITMAP) CreateBitmap( bitmap.GetWidth(), bitmap.GetHeight(), 1, 1, 0 ); HDC srcDC = CreateCompatibleDC(0); SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP()); HDC destDC = CreateCompatibleDC(0); SelectObject(destDC, (HBITMAP) m_maskBitmap); BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY); SelectObject(srcDC, 0); DeleteDC(srcDC); SelectObject(destDC, 0); DeleteDC(destDC); return TRUE; #else return FALSE; #endif } // Create a mask from a bitmap and a palette index indicating // the transparent area bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex) { if ( m_maskBitmap ) { ::DeleteObject((HBITMAP) m_maskBitmap); m_maskBitmap = 0; } #if wxUSE_PALETTE if (bitmap.Ok() && bitmap.GetPalette()->Ok()) { unsigned char red, green, blue; if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue)) { wxColour transparentColour(red, green, blue); return Create(bitmap, transparentColour); } } #endif // wxUSE_PALETTE return FALSE; } // Create a mask from a bitmap and a colour indicating // the transparent area bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour) { #ifndef __WXMICROWIN__ wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") ); if ( m_maskBitmap ) { ::DeleteObject((HBITMAP) m_maskBitmap); m_maskBitmap = 0; } int width = bitmap.GetWidth(), height = bitmap.GetHeight(); // scan the bitmap for the transparent colour and set the corresponding // pixels in the mask to BLACK and the rest to WHITE COLORREF maskColour = wxColourToPalRGB(colour); m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0); HDC srcDC = ::CreateCompatibleDC(NULL); HDC destDC = ::CreateCompatibleDC(NULL); if ( !srcDC || !destDC ) { wxLogLastError(wxT("CreateCompatibleDC")); } bool ok = TRUE; // SelectObject() will fail wxASSERT_MSG( !bitmap.GetSelectedInto(), _T("bitmap can't be selected in another DC") ); HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap)); if ( !hbmpSrcOld ) { wxLogLastError(wxT("SelectObject")); ok = FALSE; } HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap); if ( !hbmpDstOld ) { wxLogLastError(wxT("SelectObject")); ok = FALSE; } if ( ok ) { // 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); ::DeleteDC(srcDC); ::SelectObject(destDC, hbmpDstOld); ::DeleteDC(destDC); return ok; #else // __WXMICROWIN__ return FALSE; #endif // __WXMICROWIN__/!__WXMICROWIN__ } // ---------------------------------------------------------------------------- // wxBitmapHandler // ---------------------------------------------------------------------------- bool wxBitmapHandler::Create(wxGDIImage *image, void *data, long flags, int width, int height, int depth) { wxBitmap *bitmap = wxDynamicCast(image, wxBitmap); return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE; } bool wxBitmapHandler::Load(wxGDIImage *image, const wxString& name, long flags, int width, int height) { wxBitmap *bitmap = wxDynamicCast(image, wxBitmap); return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE; } bool wxBitmapHandler::Save(wxGDIImage *image, const wxString& name, int type) { wxBitmap *bitmap = wxDynamicCast(image, wxBitmap); return bitmap ? SaveFile(bitmap, name, type) : FALSE; } bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap), void *WXUNUSED(data), long WXUNUSED(type), int WXUNUSED(width), int WXUNUSED(height), int WXUNUSED(depth)) { return FALSE; } bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name), long WXUNUSED(type), int WXUNUSED(desiredWidth), int WXUNUSED(desiredHeight)) { return FALSE; } bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name), int WXUNUSED(type), const wxPalette *WXUNUSED(palette)) { return FALSE; } // ---------------------------------------------------------------------------- // DIB functions // ---------------------------------------------------------------------------- #ifndef __WXMICROWIN__ 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)); GetPaletteEntries(hPal, 0, 256, lpPe); memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER)); // Fill in the static parts of the DIB header lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); lpDIBheader->bmiHeader.biWidth = xSize; lpDIBheader->bmiHeader.biHeight = ySize; lpDIBheader->bmiHeader.biPlanes = 1; // this value must be 1, 4, 8 or 24 so PixelDepth can only be lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel); lpDIBheader->bmiHeader.biCompression = BI_RGB; lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3; lpDIBheader->bmiHeader.biClrUsed = 256; // Initialize the DIB palette for (i = 0; i < 256; i++) { lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags; lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed; lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen; lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue; } *lpDIBHeader = lpDIBheader; return TRUE; } void wxFreeDIB(LPBITMAPINFO lpDIBHeader) { free(lpDIBHeader); } #endif // ---------------------------------------------------------------------------- // global helper functions implemented here // ---------------------------------------------------------------------------- // 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") ); // get width/height from the bitmap if not given if ( !w || !h ) { BITMAP bm; ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm); w = bm.bmWidth; h = bm.bmHeight; } HDC hdcSrc = ::CreateCompatibleDC(NULL); HDC hdcDst = ::CreateCompatibleDC(NULL); if ( !hdcSrc || !hdcDst ) { wxLogLastError(wxT("CreateCompatibleDC")); } HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0); if ( !hbmpInvMask ) { wxLogLastError(wxT("CreateBitmap")); } ::SelectObject(hdcSrc, hbmpMask); ::SelectObject(hdcDst, hbmpInvMask); if ( !::BitBlt(hdcDst, 0, 0, w, h, hdcSrc, 0, 0, NOTSRCCOPY) ) { wxLogLastError(wxT("BitBlt")); } ::DeleteDC(hdcSrc); ::DeleteDC(hdcDst); return hbmpInvMask; #else return 0; #endif }