X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7b46ecac6415b5c9d76bfca160163aa5dbfd0256..a45d2855c6882edc830777de2cec9ac21caced61:/src/msw/bitmap.cpp diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp index a7c0cb8e1d..4477a07b19 100644 --- a/src/msw/bitmap.cpp +++ b/src/msw/bitmap.cpp @@ -1,430 +1,1349 @@ -///////////////////////////////////////////////////////////////////////////// +//////////////////////////////////////////////////////////////////////////// // 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 ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "bitmap.h" -#endif +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP -#include -#include "wx/setup.h" -#include "wx/list.h" -#include "wx/utils.h" -#include "wx/app.h" -#include "wx/palette.h" -#include "wx/bitmap.h" -#include "wx/icon.h" + #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" -#include "assert.h" +#if wxUSE_WXDIB +#include "wx/msw/dib.h" +#endif + +#include "wx/image.h" +#include "wx/xpmdecod.h" -#if USE_XPM_IN_MSW -#define FOR_MSW 1 -#include "../../contrib/wxxpm/libxpm.34b/lib/xpm34.h" +#ifdef wxHAVE_RAW_BITMAP +#include "wx/rawbmp.h" #endif -#include "wx/msw/dib.h" +// 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(); + wxBitmapRefData(const wxBitmapRefData& data); + 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; + + + // not implemented + wxBitmapRefData& operator=(const wxBitmapRefData&); +}; + +// ---------------------------------------------------------------------------- +// macros +// ---------------------------------------------------------------------------- -#if !USE_SHARED_LIBRARIES 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 +// +// NB: we always use DIBs under Windows CE as this is much simpler (even if +// also less efficient...) and we obviously can't use them if there is no +// DIB support compiled in at all +#ifdef __WXWINCE__ + static inline bool wxShouldCreateDIB(int, int, int, WXHDC) { return true; } + + #define ALWAYS_USE_DIB +#elif !wxUSE_WXDIB + // no sense in defining wxShouldCreateDIB() as we can't compile code + // executed if it is true, so we have to use #if's anyhow + #define NEVER_USE_DIB +#else // wxUSE_WXDIB && !__WXWINCE__ + static inline bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc) + { + // 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)); + } + + #define SOMETIMES_USE_DIB +#endif // different DIB usage scenarious + +// ---------------------------------------------------------------------------- +// 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; +} + +wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data) + : wxGDIImageRefData(data) +{ +#ifdef __WXDEBUG__ + m_selectedInto = NULL; +#endif + + // can't copy the mask as the other bitmap destroys it + m_bitmapMask = NULL; + + wxASSERT_MSG( !data.m_isDIB, + _T("can't copy bitmap locked for raw access!") ); + m_isDIB = false; + + m_hasAlpha = data.m_hasAlpha; +} + +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 -wxBitmapRefData::wxBitmapRefData(void) -{ - m_ok = FALSE; - m_width = 0; - m_height = 0; - m_depth = 0; - m_quality = 0; - m_hBitmap = 0 ; - m_selectedInto = NULL; - m_numColors = 0; - m_bitmapMask = NULL; -} - -wxBitmapRefData::~wxBitmapRefData(void) -{ - if (m_selectedInto) - { - char buf[200]; - sprintf(buf, "Bitmap was deleted without selecting out of wxMemoryDC %X.", (unsigned int) m_selectedInto); - wxFatalError(buf); - } - if (m_hBitmap) - { - DeleteObject((HBITMAP) m_hBitmap); - } - m_hBitmap = 0 ; - - if (m_bitmapMask) + if ( m_hBitmap) + { + if ( !::DeleteObject((HBITMAP)m_hBitmap) ) + { + wxLogLastError(wxT("DeleteObject(hbitmap)")); + } + } + delete m_bitmapMask; - m_bitmapMask = NULL; + m_bitmapMask = NULL; } -wxList wxBitmap::sm_handlers; +// ---------------------------------------------------------------------------- +// wxBitmap creation +// ---------------------------------------------------------------------------- -wxBitmap::wxBitmap(void) +// this function should be called from all wxBitmap ctors +void wxBitmap::Init() { - m_refData = NULL; // new wxBitmapRefData; + // m_refData = NULL; done in the base class ctor +} - if ( wxTheBitmapList ) - wxTheBitmapList->AddBitmap(this); +wxGDIImageRefData *wxBitmap::CreateData() const +{ + return new wxBitmapRefData; +} + +wxObjectRefData *wxBitmap::CloneRefData(const wxObjectRefData *dataOrig) const +{ + const wxBitmapRefData * + data = wx_static_cast(const wxBitmapRefData *, dataOrig); + if ( !data ) + return NULL; + + wxBitmap *self = wx_const_cast(wxBitmap *, this); + +#if wxUSE_WXDIB + // copy the other bitmap + if ( data->m_hBitmap ) + { + wxDIB dib((HBITMAP)(data->m_hBitmap)); + self->CopyFromDIB(dib); + } + else +#endif // wxUSE_WXDIB + { + // don't copy the bitmap data, but do copy the size, depth, ... + self->m_refData = new wxBitmapRefData(*data); + } + + return m_refData; } -wxBitmap::~wxBitmap(void) +#ifdef __WIN32__ + +bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon) { - if (wxTheBitmapList) - wxTheBitmapList->DeleteObject(this); +#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; + +#if wxUSE_WXDIB + // If the icon is 32 bits per pixel then it may have alpha channel data, + // although there are some icons that are 32 bpp but have no alpha... So + // convert to a DIB and manually check the 4th byte for each pixel. + BITMAP bm; + if ( ::GetObject(iconInfo.hbmColor, sizeof(BITMAP), (LPVOID)&bm) + && bm.bmBitsPixel == 32) + { + wxDIB dib(iconInfo.hbmColor); + if (dib.IsOk()) + { + unsigned char* pixels = dib.GetData(); + for (int idx=0; idxm_hasAlpha = true; + break; + } + } + } + } +#endif + if ( !refData->m_hasAlpha ) + { + // the mask returned by GetIconInfo() is inverted 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 + wxUnusedVar(icon); + return false; +#endif } -bool wxBitmap::FreeResource(bool force) +#endif // Win32 + +bool wxBitmap::CopyFromCursor(const wxCursor& cursor) { - if ( !M_BITMAPDATA ) - return FALSE; + UnRef(); - if (M_BITMAPDATA->m_selectedInto) - { - char buf[200]; - sprintf(buf, "Bitmap %X was deleted without selecting out of wxMemoryDC %X.", (unsigned int) this, (unsigned int) M_BITMAPDATA->m_selectedInto); - wxFatalError(buf); - } - if (M_BITMAPDATA->m_hBitmap) - { - DeleteObject((HBITMAP) M_BITMAPDATA->m_hBitmap); - } - M_BITMAPDATA->m_hBitmap = 0 ; + if ( !cursor.Ok() ) + return false; -/* - if (M_BITMAPDATA->m_bitmapPalette) - delete M_BITMAPDATA->m_bitmapPalette; + return CopyFromIconOrCursor(cursor); +} + +bool wxBitmap::CopyFromIcon(const wxIcon& icon) +{ + UnRef(); - M_BITMAPDATA->m_bitmapPalette = NULL ; -*/ + if ( !icon.Ok() ) + return false; - return TRUE; + return CopyFromIconOrCursor(icon); } +#ifndef NEVER_USE_DIB -wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits) +bool wxBitmap::CopyFromDIB(const wxDIB& dib) { - m_refData = new wxBitmapRefData; + wxCHECK_MSG( dib.IsOk(), false, _T("invalid DIB in CopyFromDIB") ); - M_BITMAPDATA->m_width = the_width ; - M_BITMAPDATA->m_height = the_height ; - M_BITMAPDATA->m_depth = no_bits ; - M_BITMAPDATA->m_numColors = 0; +#ifdef SOMETIMES_USE_DIB + HBITMAP hbitmap = dib.CreateDDB(); + if ( !hbitmap ) + return false; +#else // ALWAYS_USE_DIB + HBITMAP hbitmap = ((wxDIB &)dib).Detach(); // const_cast +#endif // SOMETIMES_USE_DIB/ALWAYS_USE_DIB + + 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; + } - M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateBitmap(the_width, the_height, 1, no_bits, bits); + delete palette; +#endif // wxUSE_PALETTE - if (M_BITMAPDATA->m_hBitmap) - M_BITMAPDATA->m_ok = TRUE; - else - M_BITMAPDATA->m_ok = FALSE; + return true; +} - M_BITMAPDATA->m_selectedInto = NULL; +#endif // NEVER_USE_DIB - if ( wxTheBitmapList ) - wxTheBitmapList->AddBitmap(this); +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 reversed! + 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 |= (unsigned char)(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 && wxUSE_WXDIB + 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 + wxUnusedVar(data); + return false; +#endif } wxBitmap::wxBitmap(int w, int h, int d) { - (void)Create(w, h, d); + Init(); - if ( wxTheBitmapList ) - wxTheBitmapList->AddBitmap(this); + (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) { - (void) Create(data, type, width, height, depth); + Init(); - if ( wxTheBitmapList ) - wxTheBitmapList->AddBitmap(this); + (void)Create(data, type, width, height, depth); } -wxBitmap::wxBitmap(const wxString& filename, long type) +wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type) { - LoadFile(filename, (int)type); + Init(); - if ( wxTheBitmapList ) - wxTheBitmapList->AddBitmap(this); + LoadFile(filename, (int)type); } -#if USE_XPM_IN_MSW -// Create from data -wxBitmap::wxBitmap(const char **data, wxItem *WXUNUSED(anItem)) +bool wxBitmap::Create(int width, int height, int depth) { - (void) Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0); + 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()); } -#endif -bool wxBitmap::Create(int w, int h, int d) +bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc) { - UnRef(); + UnRef(); + + m_refData = new wxBitmapRefData; + + GetBitmapData()->m_width = w; + GetBitmapData()->m_height = h; + + HBITMAP hbmp wxDUMMY_INITIALIZE(0); + +#ifndef NEVER_USE_DIB + if ( wxShouldCreateDIB(w, h, d, hdc) ) + { + if ( d == -1 ) + { + // create DIBs without alpha channel by default + d = 24; + } - m_refData = new wxBitmapRefData; + wxDIB dib(w, h, d); + if ( !dib.IsOk() ) + return false; - M_BITMAPDATA->m_width = w; - M_BITMAPDATA->m_height = h; - M_BITMAPDATA->m_depth = d; + // don't delete the DIB section in dib object dtor + hbmp = dib.Detach(); - if (d > 0) - { - M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateBitmap(w, h, 1, d, NULL); - } - else - { - HDC dc = GetDC(NULL); - M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateCompatibleBitmap(dc, w, h); - ReleaseDC(NULL, dc); - M_BITMAPDATA->m_depth = wxDisplayDepth(); - } - if (M_BITMAPDATA->m_hBitmap) - M_BITMAPDATA->m_ok = TRUE; - else - M_BITMAPDATA->m_ok = FALSE; - return M_BITMAPDATA->m_ok; + GetBitmapData()->m_isDIB = true; + GetBitmapData()->m_depth = d; + } + else // create a DDB +#endif // NEVER_USE_DIB + { +#ifndef ALWAYS_USE_DIB +#ifndef __WXMICROWIN__ + if ( d > 0 ) + { + hbmp = ::CreateBitmap(w, h, 1, d, NULL); + if ( !hbmp ) + { + wxLogLastError(wxT("CreateBitmap")); + } + + GetBitmapData()->m_depth = d; + } + else // d == 0, create bitmap compatible with the screen +#endif // !__WXMICROWIN__ + { + ScreenHDC dc; + hbmp = ::CreateCompatibleBitmap(dc, w, h); + if ( !hbmp ) + { + wxLogLastError(wxT("CreateCompatibleBitmap")); + } + + GetBitmapData()->m_depth = wxDisplayDepth(); + } +#endif // !ALWAYS_USE_DIB + } + + SetHBITMAP((WXHBITMAP)hbmp); + + return Ok(); } -bool wxBitmap::LoadFile(const wxString& filename, long type) +#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) { - UnRef(); + // 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)); + } + } + } - m_refData = new wxBitmapRefData; + ::SelectObject(hMemDC, hOldBitmap); + ::DeleteDC(hMemDC); + if (hasMask) + { + ::SelectObject(hMaskDC, hOldMaskBitmap); + ::DeleteDC(hMaskDC); - wxBitmapHandler *handler = FindHandler(type); + ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap); + } - if ( handler == NULL ) { - wxLogWarning("no bitmap handler for type %d defined.", type); + SetWidth(image.GetWidth()); + SetHeight(image.GetHeight()); + SetDepth(screenDepth); + SetHBITMAP( (WXHBITMAP) hBitmap ); - return FALSE; - } +#if wxUSE_PALETTE + // Copy the palette from the source image + SetPalette(image.GetPalette()); +#endif // wxUSE_PALETTE - return handler->LoadFile(this, filename, type, -1, -1); + return true; } -bool wxBitmap::Create(void *data, long type, int width, int height, int depth) +wxImage wxBitmap::ConvertToImage() const { - UnRef(); + // 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); - m_refData = new wxBitmapRefData; + HBITMAP hBitmap = (HBITMAP) GetHBITMAP(); - wxBitmapHandler *handler = FindHandler(type); + HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap); - if ( handler == NULL ) { - wxLogWarning("no bitmap handler for type %d defined.", type); + 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); + } + } - return FALSE; - } + ::SelectObject(hMemDC, hOldBitmap); + ::DeleteDC(hMemDC); - return handler->Create(this, data, type, width, height, depth); +#if wxUSE_PALETTE + // Copy the palette from the source image + if (GetPalette()) + image.SetPalette(* GetPalette()); +#endif // wxUSE_PALETTE + + return image; } -bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette) -{ - wxBitmapHandler *handler = FindHandler(type); +#endif // __WXMICROWIN__ - if ( handler == NULL ) { - wxLogWarning("no bitmap handler for type %d defined.", type); +// ---------------------------------------------------------------------------- +// wxImage to/from conversions +// ---------------------------------------------------------------------------- - return FALSE; - } +#if wxUSE_WXDIB - return handler->SaveFile(this, filename, type, palette); +bool wxBitmap::CreateFromImage(const wxImage& image, int depth) +{ + return CreateFromImage(image, depth, 0); } -void wxBitmap::SetWidth(int w) +bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc) { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + wxCHECK_MSG( dc.Ok(), false, + _T("invalid HDC in wxBitmap::CreateFromImage()") ); - M_BITMAPDATA->m_width = w; + return CreateFromImage(image, -1, dc.GetHDC()); } -void wxBitmap::SetHeight(int h) +bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc) { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + 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; + if (depth == -1) + depth = dib.GetDepth(); // Get depth from image if none specified + + // 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 wxDUMMY_INITIALIZE(0); + + // 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(); - M_BITMAPDATA->m_height = h; + refData->m_isDIB = true; + refData->m_depth = depth; + } +#ifndef ALWAYS_USE_DIB + else // we need to convert DIB to DDB + { + hbitmap = dib.CreateDDB((HDC)hdc); + + refData->m_depth = depth; + } +#endif // !ALWAYS_USE_DIB + + // validate this object + SetHBITMAP((WXHBITMAP)hbitmap); + + // finally also set the mask if we have one + if ( image.HasMask() ) + { + const size_t len = 2*((w+15)/16); + BYTE *src = image.GetData(); + BYTE *data = new BYTE[h*len]; + memset(data, 0, h*len); + BYTE r = image.GetMaskRed(), + g = image.GetMaskGreen(), + b = image.GetMaskBlue(); + BYTE *dst = data; + for ( int y = 0; y < h; y++, dst += len ) + { + BYTE *dstLine = dst; + BYTE mask = 0x80; + for ( int x = 0; x < w; x++, src += 3 ) + { + if (src[0] != r || src[1] != g || src[2] != b) + *dstLine |= mask; + + if ( (mask >>= 1) == 0 ) + { + dstLine++; + mask = 0x80; + } + } + } + + hbitmap = ::CreateBitmap(w, h, 1, 1, data); + if ( !hbitmap ) + { + wxLogLastError(_T("CreateBitmap(mask)")); + } + else + { + SetMask(new wxMask((WXHBITMAP)hbitmap)); + } + + delete[] data; + } + + return true; } -void wxBitmap::SetDepth(int d) +wxImage wxBitmap::ConvertToImage() const { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + // convert DDB to DIB + wxDIB dib(*this); + + if ( !dib.IsOk() ) + { + return wxNullImage; + } + + // and then DIB to our wxImage + wxImage image = dib.ConvertToImage(); + if ( !image.Ok() ) + { + return wxNullImage; + } + + // now do the same for the mask, if we have any + HBITMAP hbmpMask = GetMask() ? (HBITMAP) GetMask()->GetMaskBitmap() : NULL; + if ( hbmpMask ) + { + wxDIB dibMask(hbmpMask); + if ( dibMask.IsOk() ) + { + // TODO: use wxRawBitmap to iterate over DIB + + // we hard code the mask colour for now but we could also make an + // effort (and waste time) to choose a colour not present in the + // image already to avoid having to fudge the pixels below -- + // whether it's worth to do it is unclear however + 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; + + const int h = dibMask.GetHeight(); + const int w = dibMask.GetWidth(); + const int bpp = dibMask.GetDepth(); + const int maskBytesPerPixel = bpp >> 3; + const int maskBytesPerLine = wxDIB::GetLineSize(w, bpp); + unsigned char *data = image.GetData(); + + // remember that DIBs are stored in bottom to top order + unsigned char * + maskLineStart = dibMask.GetData() + ((h - 1) * maskBytesPerLine); + + for ( int y = 0; y < h; y++, maskLineStart -= maskBytesPerLine ) + { + // traverse one mask DIB line + unsigned char *mask = maskLineStart; + for ( int x = 0; x < w; x++, mask += maskBytesPerPixel ) + { + // should this pixel be transparent? + if ( *mask ) + { + // no, check that it isn't transparent by accident + if ( (data[0] == MASK_RED) && + (data[1] == MASK_GREEN) && + (data[2] == MASK_BLUE) ) + { + // we have to fudge the colour a bit to prevent + // this pixel from appearing transparent + data[2] = MASK_BLUE_REPLACEMENT; + } + + data += 3; + } + else // yes, transparent pixel + { + *data++ = MASK_RED; + *data++ = MASK_GREEN; + *data++ = MASK_BLUE; + } + } + } + + image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE); + } + } - M_BITMAPDATA->m_depth = d; + return image; } -void wxBitmap::SetQuality(int q) +#endif // wxUSE_WXDIB + +#endif // wxUSE_IMAGE + +// ---------------------------------------------------------------------------- +// loading and saving bitmaps +// ---------------------------------------------------------------------------- + +bool wxBitmap::LoadFile(const wxString& filename, long type) { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + UnRef(); + + wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler); + + if ( handler ) + { + m_refData = new wxBitmapRefData; + + return handler->LoadFile(this, filename, type, -1, -1); + } +#if wxUSE_IMAGE && wxUSE_WXDIB + else // no bitmap handler found + { + wxImage image; + if ( image.LoadFile( filename, type ) && image.Ok() ) + { + *this = wxBitmap(image); - M_BITMAPDATA->m_quality = q; + return true; + } + } +#endif // wxUSE_IMAGE + + return false; } -void wxBitmap::SetOk(bool isOk) +bool wxBitmap::Create(void *data, long type, int width, int height, int depth) { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + 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; - M_BITMAPDATA->m_ok = isOk; + return handler->Create(this, data, type, width, height, depth); } -void wxBitmap::SetPalette(const wxPalette& palette) +bool wxBitmap::SaveFile(const wxString& filename, + int type, + const wxPalette *palette) { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler); + + if ( handler ) + { + return handler->SaveFile(this, filename, type, palette); + } +#if wxUSE_IMAGE && wxUSE_WXDIB + else // no bitmap handler found + { + // FIXME what about palette? shouldn't we use it? + wxImage image = ConvertToImage(); + if ( image.Ok() ) + { + return image.SaveFile(filename, type); + } + } +#endif // wxUSE_IMAGE - M_BITMAPDATA->m_bitmapPalette = palette ; + return false; } -void wxBitmap::SetMask(wxMask *mask) +// ---------------------------------------------------------------------------- +// 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, GetDepth() ); + wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") ); + +#ifndef __WXMICROWIN__ + // handle alpha channel, if any + if (HasAlpha()) + ret.UseAlpha(); + + // 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 { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL; +} - M_BITMAPDATA->m_bitmapMask = mask ; +wxBitmap wxBitmap::GetMaskBitmap() const +{ + wxBitmap bmp; + wxMask *mask = GetMask(); + if ( mask ) + bmp.SetHBITMAP(mask->GetMaskBitmap()); + return bmp; } -void wxBitmap::SetHBITMAP(WXHBITMAP bmp) +#ifdef __WXDEBUG__ + +wxDC *wxBitmap::GetSelectedInto() const { - if (!M_BITMAPDATA) - m_refData = new wxBitmapRefData; + return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL; +} - M_BITMAPDATA->m_hBitmap = bmp; +#endif + +#if WXWIN_COMPATIBILITY_2_4 + +int wxBitmap::GetQuality() const +{ + return 0; } -void wxBitmap::AddHandler(wxBitmapHandler *handler) +#endif // WXWIN_COMPATIBILITY_2_4 + +void wxBitmap::UseAlpha() { - sm_handlers.Append(handler); + if ( GetBitmapData() ) + GetBitmapData()->m_hasAlpha = true; } -void wxBitmap::InsertHandler(wxBitmapHandler *handler) +bool wxBitmap::HasAlpha() const { - sm_handlers.Insert(handler); + return GetBitmapData() && GetBitmapData()->m_hasAlpha; } -bool wxBitmap::RemoveHandler(const wxString& name) +// ---------------------------------------------------------------------------- +// wxBitmap setters +// ---------------------------------------------------------------------------- + +#ifdef __WXDEBUG__ + +void wxBitmap::SetSelectedInto(wxDC *dc) { - wxBitmapHandler *handler = FindHandler(name); - if ( handler ) - { - sm_handlers.DeleteObject(handler); - return TRUE; - } - else - return FALSE; + if ( GetBitmapData() ) + GetBitmapData()->m_selectedInto = dc; } -wxBitmapHandler *wxBitmap::FindHandler(const wxString& name) +#endif + +#if wxUSE_PALETTE + +void wxBitmap::SetPalette(const wxPalette& palette) { - wxNode *node = sm_handlers.First(); - while ( node ) - { - wxBitmapHandler *handler = (wxBitmapHandler *)node->Data(); - if ( handler->GetName() == name ) - return handler; - node = node->Next(); - } - return NULL; + AllocExclusive(); + + GetBitmapData()->m_bitmapPalette = palette; } -wxBitmapHandler *wxBitmap::FindHandler(const wxString& extension, long bitmapType) +#endif // wxUSE_PALETTE + +void wxBitmap::SetMask(wxMask *mask) { - wxNode *node = sm_handlers.First(); - while ( node ) - { - wxBitmapHandler *handler = (wxBitmapHandler *)node->Data(); - if ( handler->GetExtension() == extension && - (bitmapType == -1 || handler->GetType() == bitmapType) ) - return handler; - node = node->Next(); - } - return NULL; + AllocExclusive(); + + GetBitmapData()->SetMask(mask); } -wxBitmapHandler *wxBitmap::FindHandler(long bitmapType) +#if WXWIN_COMPATIBILITY_2_4 + +void wxBitmap::SetQuality(int WXUNUSED(quality)) { - wxNode *node = sm_handlers.First(); - while ( node ) - { - wxBitmapHandler *handler = (wxBitmapHandler *)node->Data(); - if (handler->GetType() == bitmapType) - return handler; - node = node->Next(); - } - return NULL; } -// New Create/FreeDIB functions since ones in dibutils.cpp are confusing -static long createDIB(long xSize, long ySize, long bitsPerPixel, - HPALETTE hPal, LPBITMAPINFO* lpDIBHeader); -static long freeDIB(LPBITMAPINFO lpDIBHeader); +#endif // WXWIN_COMPATIBILITY_2_4 -// 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 +// ---------------------------------------------------------------------------- +// raw bitmap access support +// ---------------------------------------------------------------------------- + +#ifdef wxHAVE_RAW_BITMAP +void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp) { - wxMemoryDC memDC; - wxBitmap tmpBitmap(this->GetWidth(), this->GetHeight(), dc.GetDepth()); - HPALETTE hPal = NULL; - LPBITMAPINFO lpDib; - void *lpBits = NULL; +#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, NULL, + _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(); + } - wxASSERT( this->GetPalette() && this->GetPalette()->Ok() && (this->GetPalette()->GetHPALETTE() != NULL) ); + 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; + } - tmpBitmap.SetPalette(this->GetPalette()); - memDC.SelectObject(tmpBitmap); - memDC.SetPalette(this->GetPalette()); + // ok, store the relevant info in wxPixelDataBase + const LONG h = ds.dsBm.bmHeight; - hPal = (HPALETTE) this->GetPalette()->GetHPALETTE(); + data.m_width = ds.dsBm.bmWidth; + data.m_height = h; - // set the height negative because in a DIB the order of the lines is reversed - createDIB(this->GetWidth(), -this->GetHeight(), this->GetDepth(), hPal, &lpDib); + // remember that DIBs are stored in top to bottom order! + // (We can't just use ds.dsBm.bmWidthBytes here, because it isn't always a + // multiple of 2, as required by the documentation. So we use the official + // formula, which we already use elsewhere.) + const LONG bytesPerRow = + wxDIB::GetLineSize(ds.dsBm.bmWidth, ds.dsBm.bmBitsPixel); + data.m_stride = -bytesPerRow; + + char *bits = (char *)ds.dsBm.bmBits; + if ( h > 1 ) + { + bits += (h - 1)*bytesPerRow; + } + + return bits; +#else + return NULL; +#endif +} - lpBits = malloc(lpDib->bmiHeader.biSizeImage); +void wxBitmap::UngetRawData(wxPixelDataBase& dataBase) +{ +#if wxUSE_WXDIB + if ( !Ok() ) + return; - ::GetBitmapBits((HBITMAP)GetHBITMAP(), lpDib->bmiHeader.biSizeImage, lpBits); + if ( !&dataBase ) + { + // 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; + } - ::SetDIBitsToDevice((HDC) memDC.GetHDC(), 0, 0, this->GetWidth(), this->GetHeight(), - 0, 0, 0, this->GetHeight(), lpBits, lpDib, DIB_RGB_COLORS); + // 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; - free(lpBits); + // TODO: convert - freeDIB(lpDib); - return (tmpBitmap); + delete dib; + } +#endif // wxUSE_WXDIB } +#endif // #ifdef wxHAVE_RAW_BITMAP -/* - * wxMask - */ +// ---------------------------------------------------------------------------- +// wxMask +// ---------------------------------------------------------------------------- -wxMask::wxMask(void) +wxMask::wxMask() { m_maskBitmap = 0; } @@ -434,7 +1353,7 @@ wxMask::wxMask(void) wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour) { m_maskBitmap = 0; - Create(bitmap, colour); + Create(bitmap, colour); } // Construct a mask from a bitmap and a palette index indicating @@ -442,17 +1361,17 @@ wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour) wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex) { m_maskBitmap = 0; - Create(bitmap, paletteIndex); + Create(bitmap, paletteIndex); } // Construct a mask from a mono bitmap (copies the bitmap). wxMask::wxMask(const wxBitmap& bitmap) { m_maskBitmap = 0; - Create(bitmap); + Create(bitmap); } -wxMask::~wxMask(void) +wxMask::~wxMask() { if ( m_maskBitmap ) ::DeleteObject((HBITMAP) m_maskBitmap); @@ -461,30 +1380,35 @@ wxMask::~wxMask(void) // 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; - } - if (!bitmap.Ok() || bitmap.GetDepth() != 1) - { - return FALSE; - } - 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; + { + ::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 + wxUnusedVar(bitmap); + return false; +#endif } // Create a mask from a bitmap and a palette index indicating @@ -492,397 +1416,177 @@ bool wxMask::Create(const wxBitmap& bitmap) bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex) { if ( m_maskBitmap ) - { - ::DeleteObject((HBITMAP) m_maskBitmap); - m_maskBitmap = 0; - } - 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); + ::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); + } } - } - return FALSE; +#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) { - if ( m_maskBitmap ) - { - ::DeleteObject((HBITMAP) m_maskBitmap); - m_maskBitmap = 0; - } - if (!bitmap.Ok()) - { - return FALSE; - } - - // scan the bitmap for the transparent colour and set - // the corresponding pixels in the mask to BLACK and - // the rest to WHITE - COLORREF maskColour = RGB(colour.Red(), colour.Green(), colour.Blue()); - 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); - - // this is not very efficient, but I can't think - // of a better way of doing it - for (int w = 0; w < bitmap.GetWidth(); w++) - { - for (int h = 0; h < bitmap.GetHeight(); h++) - { - COLORREF col = GetPixel(srcDC, w, h); - if (col == maskColour) - { - ::SetPixel(destDC, w, h, RGB(0, 0, 0)); - } - else - { - ::SetPixel(destDC, w, h, RGB(255, 255, 255)); - } - } - } - ::SelectObject(srcDC, 0); - ::DeleteDC(srcDC); - ::SelectObject(destDC, 0); - ::DeleteDC(destDC); - return TRUE; -} - -/* - * wxBitmapHandler - */ +#ifndef __WXMICROWIN__ + wxCHECK_MSG( bitmap.Ok(), false, _T("invalid bitmap in wxMask::Create") ); -IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject) + if ( m_maskBitmap ) + { + ::DeleteObject((HBITMAP) m_maskBitmap); + m_maskBitmap = 0; + } -bool wxBitmapHandler::Create(wxBitmap *bitmap, void *data, long type, int width, int height, int depth) -{ - return FALSE; -} + int width = bitmap.GetWidth(), + height = bitmap.GetHeight(); -bool wxBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long type, - int desiredWidth, int desiredHeight) -{ - return FALSE; -} + // 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); -bool wxBitmapHandler::SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette) -{ - return FALSE; -} + HDC srcDC = ::CreateCompatibleDC(NULL); + HDC destDC = ::CreateCompatibleDC(NULL); + if ( !srcDC || !destDC ) + { + wxLogLastError(wxT("CreateCompatibleDC")); + } -/* - * Standard handlers - */ + bool ok = true; -class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler -{ - DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler) -public: - inline wxBMPResourceHandler(void) - { - m_name = "Windows bitmap resource"; - m_extension = ""; - m_type = wxBITMAP_TYPE_BMP_RESOURCE; - }; - - virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags, - int desiredWidth, int desiredHeight); -}; -IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler) + // SelectObject() will fail + wxASSERT_MSG( !bitmap.GetSelectedInto(), + _T("bitmap can't be selected in another DC") ); -bool wxBMPResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags, - int desiredWidth, int desiredHeight) -{ - // TODO: load colourmap. - M_BITMAPHANDLERDATA->m_hBitmap = (WXHBITMAP) ::LoadBitmap(wxGetInstance(), name); - if (M_BITMAPHANDLERDATA->m_hBitmap) + HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap)); + if ( !hbmpSrcOld ) { - M_BITMAPHANDLERDATA->m_ok = TRUE; - BITMAP bm; - GetObject((HBITMAP) M_BITMAPHANDLERDATA->m_hBitmap, sizeof(BITMAP), (LPSTR) &bm); - M_BITMAPHANDLERDATA->m_width = bm.bmWidth; - M_BITMAPHANDLERDATA->m_height = bm.bmHeight; - M_BITMAPHANDLERDATA->m_depth = bm.bmBitsPixel; - return TRUE; - } + wxLogLastError(wxT("SelectObject")); - // it's probably not found - wxLogError("Can't load bitmap '%s' from resources! Check .rc file.", name.c_str()); + ok = false; + } - return FALSE; -} + HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap); + if ( !hbmpDstOld ) + { + wxLogLastError(wxT("SelectObject")); -class WXDLLEXPORT wxBMPFileHandler: public wxBitmapHandler -{ - DECLARE_DYNAMIC_CLASS(wxBMPFileHandler) -public: - inline wxBMPFileHandler(void) - { - m_name = "Windows bitmap file"; - m_extension = "bmp"; - m_type = wxBITMAP_TYPE_BMP; - }; - - virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags, - int desiredWidth, int desiredHeight); - virtual bool SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette = NULL); -}; -IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler) + ok = false; + } -bool wxBMPFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags, - int desiredWidth, int desiredHeight) -{ -#if USE_IMAGE_LOADING_IN_MSW - wxPalette *palette = NULL; - bool success = FALSE; -/* - if (type & wxBITMAP_DISCARD_COLOURMAP) - success = wxLoadIntoBitmap(WXSTRINGCAST name, bitmap); - else -*/ - success = (wxLoadIntoBitmap(WXSTRINGCAST name, bitmap, &palette) != 0); - if (!success && palette) + if ( ok ) { - delete palette; - palette = NULL; + // 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); } - if (palette) - M_BITMAPHANDLERDATA->m_bitmapPalette = *palette; - return success; -#else - return FALSE; -#endif -} -bool wxBMPFileHandler::SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *pal) -{ -#if USE_IMAGE_LOADING_IN_MSW - wxPalette *actualPalette = (wxPalette *)pal; - if (!actualPalette && (!M_BITMAPHANDLERDATA->m_bitmapPalette.IsNull())) - actualPalette = & (M_BITMAPHANDLERDATA->m_bitmapPalette); - return (wxSaveBitmap(WXSTRINGCAST name, bitmap, actualPalette) != 0); -#else - return FALSE; -#endif + ::SelectObject(srcDC, hbmpSrcOld); + ::DeleteDC(srcDC); + ::SelectObject(destDC, hbmpDstOld); + ::DeleteDC(destDC); + + return ok; +#else // __WXMICROWIN__ + wxUnusedVar(bitmap); + wxUnusedVar(colour); + return false; +#endif // __WXMICROWIN__/!__WXMICROWIN__ } -class WXDLLEXPORT wxXPMFileHandler: public wxBitmapHandler +// ---------------------------------------------------------------------------- +// wxBitmapHandler +// ---------------------------------------------------------------------------- + +bool wxBitmapHandler::Create(wxGDIImage *image, + void *data, + long flags, + int width, int height, int depth) { - DECLARE_DYNAMIC_CLASS(wxXPMFileHandler) -public: - inline wxXPMFileHandler(void) - { - m_name = "XPM bitmap file"; - m_extension = "xpm"; - m_type = wxBITMAP_TYPE_XPM; - }; - - virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags, - int desiredWidth = -1, int desiredHeight = -1); - virtual bool SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette = NULL); -}; -IMPLEMENT_DYNAMIC_CLASS(wxXPMFileHandler, wxBitmapHandler) - -bool wxXPMFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags, - int desiredWidth, int desiredHeight) -{ -#if USE_XPM_IN_MSW - XImage *ximage; - XpmAttributes xpmAttr; - HDC dc; - - M_BITMAPHANDLERDATA->m_ok = FALSE; - dc = CreateCompatibleDC(NULL); - if (dc) - { - xpmAttr.valuemask = XpmReturnPixels; - int errorStatus = XpmReadFileToImage(&dc, WXSTRINGCAST name, &ximage, (XImage **) NULL, &xpmAttr); - DeleteDC(dc); - if (errorStatus == XpmSuccess) - { - M_BITMAPHANDLERDATA->m_hBitmap = (WXHBITMAP) ximage->bitmap; - - BITMAP bm; - GetObject((HBITMAP)M_BITMAPHANDLERDATA->m_hBitmap, sizeof(bm), (LPSTR) & bm); - - M_BITMAPHANDLERDATA->m_width = (bm.bmWidth); - M_BITMAPHANDLERDATA->m_height = (bm.bmHeight); - M_BITMAPHANDLERDATA->m_depth = (bm.bmPlanes * bm.bmBitsPixel); - M_BITMAPHANDLERDATA->m_numColors = xpmAttr.npixels; - XpmFreeAttributes(&xpmAttr); - XImageFree(ximage); - - M_BITMAPHANDLERDATA->m_ok = TRUE; - return TRUE; - } - else - { - M_BITMAPHANDLERDATA->m_ok = FALSE; - return FALSE; - } - } -#endif + wxBitmap *bitmap = wxDynamicCast(image, wxBitmap); - return FALSE; + return bitmap ? Create(bitmap, data, flags, width, height, depth) : false; } -bool wxXPMFileHandler::SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette) +bool wxBitmapHandler::Load(wxGDIImage *image, + const wxString& name, + long flags, + int width, int height) { -#if USE_XPM_IN_MSW - HDC dc = NULL; - - Visual *visual = NULL; - XImage ximage; + wxBitmap *bitmap = wxDynamicCast(image, wxBitmap); - dc = CreateCompatibleDC(NULL); - if (dc) - { - if (SelectObject(dc, (HBITMAP) M_BITMAPHANDLERDATA->m_hBitmap)) - { /* for following SetPixel */ - /* fill the XImage struct 'by hand' */ - ximage.width = M_BITMAPHANDLERDATA->m_width; - ximage.height = M_BITMAPHANDLERDATA->m_height; - ximage.depth = M_BITMAPHANDLERDATA->m_depth; - ximage.bitmap = (void *)M_BITMAPHANDLERDATA->m_hBitmap; - int errorStatus = XpmWriteFileFromImage(&dc, WXSTRINGCAST name, - &ximage, (XImage *) NULL, (XpmAttributes *) NULL); - - if (dc) - DeleteDC(dc); - - if (errorStatus == XpmSuccess) - return TRUE; /* no error */ - else - return FALSE; - } else return FALSE; - } else return FALSE; -#else - return FALSE; -#endif + return bitmap ? LoadFile(bitmap, name, flags, width, height) : false; } -class WXDLLEXPORT wxXPMDataHandler: public wxBitmapHandler +bool wxBitmapHandler::Save(wxGDIImage *image, + const wxString& name, + int type) { - DECLARE_DYNAMIC_CLASS(wxXPMDataHandler) -public: - inline wxXPMDataHandler(void) - { - m_name = "XPM bitmap data"; - m_extension = "xpm"; - m_type = wxBITMAP_TYPE_XPM_DATA; - }; - - virtual bool Create(wxBitmap *bitmap, void *data, long flags, int width, int height, int depth = 1); -}; -IMPLEMENT_DYNAMIC_CLASS(wxXPMDataHandler, wxBitmapHandler) - -bool wxXPMDataHandler::Create(wxBitmap *bitmap, void *data, long flags, int width, int height, int depth) -{ -#if USE_XPM_IN_MSW - XImage *ximage; - int ErrorStatus; - XpmAttributes xpmAttr; - HDC dc; - - M_BITMAPHANDLERDATA->m_ok = FALSE; - M_BITMAPHANDLERDATA->m_numColors = 0; + wxBitmap *bitmap = wxDynamicCast(image, wxBitmap); - dc = CreateCompatibleDC(NULL); /* memory DC */ - - if (dc) - { - xpmAttr.valuemask = XpmReturnInfos; /* get infos back */ - ErrorStatus = XpmCreateImageFromData(&dc, (char **)data, - &ximage, (XImage **) NULL, &xpmAttr); - - if (ErrorStatus == XpmSuccess) - { - /* ximage is malloced and contains bitmap and attributes */ - M_BITMAPHANDLERDATA->m_hBitmap = (WXHBITMAP) ximage->bitmap; - - BITMAP bm; - GetObject((HBITMAP) M_BITMAPHANDLERDATA->m_hBitmap, sizeof(bm), (LPSTR) & bm); - - M_BITMAPHANDLERDATA->m_width = (bm.bmWidth); - M_BITMAPHANDLERDATA->m_height = (bm.bmHeight); - M_BITMAPHANDLERDATA->m_depth = (bm.bmPlanes * bm.bmBitsPixel); - M_BITMAPHANDLERDATA->m_numColors = xpmAttr.npixels; - XpmFreeAttributes(&xpmAttr); - - XImageFree(ximage); // releases the malloc, but does not detroy - // the bitmap - M_BITMAPHANDLERDATA->m_ok = TRUE; - DeleteDC(dc); - - return TRUE; - } - else - { - M_BITMAPHANDLERDATA->m_ok = FALSE; -// XpmDebugError(ErrorStatus, NULL); - DeleteDC(dc); - return FALSE; - } - } -#endif + return bitmap ? SaveFile(bitmap, name, type) : false; +} - return FALSE; +bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap), + void *WXUNUSED(data), + long WXUNUSED(type), + int WXUNUSED(width), + int WXUNUSED(height), + int WXUNUSED(depth)) +{ + return false; } -void wxBitmap::CleanUpHandlers(void) +bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap), + const wxString& WXUNUSED(name), + long WXUNUSED(type), + int WXUNUSED(desiredWidth), + int WXUNUSED(desiredHeight)) { - wxNode *node = sm_handlers.First(); - while ( node ) - { - wxBitmapHandler *handler = (wxBitmapHandler *)node->Data(); - wxNode *next = node->Next(); - delete handler; - delete node; - node = next; - } + return false; } -void wxBitmap::InitStandardHandlers(void) +bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap), + const wxString& WXUNUSED(name), + int WXUNUSED(type), + const wxPalette *WXUNUSED(palette)) { - AddHandler(new wxBMPResourceHandler); - AddHandler(new wxBMPFileHandler); - AddHandler(new wxXPMFileHandler); - AddHandler(new wxXPMDataHandler); - AddHandler(new wxICOResourceHandler); - AddHandler(new wxICOFileHandler); + return false; } -static long createDIB(long xSize, long ySize, long bitsPerPixel, - HPALETTE hPal, LPBITMAPINFO* lpDIBHeader) +// ---------------------------------------------------------------------------- +// 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)); + LPBITMAPINFO lpDIBheader = (BITMAPINFO *) malloc(headerSize); + LPPALETTEENTRY 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; @@ -892,8 +1596,7 @@ static long createDIB(long xSize, long ySize, long bitsPerPixel, // 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.biSizeImage = (xSize * abs(ySize) * bitsPerPixel) >> 3; lpDIBheader->bmiHeader.biClrUsed = 256; @@ -907,21 +1610,162 @@ static long createDIB(long xSize, long ySize, long bitsPerPixel, *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; + } + + if ( bmp.HasAlpha() ) + { + // Create an empty mask bitmap. + // it doesn't seem to work if we mess with the mask at all. + HBITMAP hMonoBitmap = CreateBitmap(bmp.GetWidth(),bmp.GetHeight(),1,1,NULL); + + 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 = hMonoBitmap; + iconInfo.hbmColor = GetHbitmapOf(bmp); + + HICON hicon = ::CreateIconIndirect(&iconInfo); + + ::DeleteObject(hMonoBitmap); + + return hicon; + } + + 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() && !bmp.HasAlpha() ) + { + // we created the mask, now delete it + delete mask; + } - return (0); + // 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); +} -static long freeDIB(LPBITMAPINFO lpDIBHeader) +HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h) { +#ifndef __WXMICROWIN__ + wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") ); - if (lpDIBHeader != NULL) { - free(lpDIBHeader); - } + // 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; + } - return (0); -} + 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")); + } + HGDIOBJ srcTmp = ::SelectObject(hdcSrc, hbmpMask); + HGDIOBJ dstTmp = ::SelectObject(hdcDst, hbmpInvMask); + if ( !::BitBlt(hdcDst, 0, 0, w, h, + hdcSrc, 0, 0, + NOTSRCCOPY) ) + { + wxLogLastError(wxT("BitBlt")); + } + + // Deselect objects + SelectObject(hdcSrc,srcTmp); + SelectObject(hdcDst,dstTmp); + + ::DeleteDC(hdcSrc); + ::DeleteDC(hdcDst); + return hbmpInvMask; +#else + return 0; +#endif +}