X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/3f399a69cceccea1f955dab85af0c21b361c78a0..10a59880771fae005b31e003916a028267b54427:/src/msw/bitmap.cpp diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp index e74cf073a4..b174fdf9de 100644 --- a/src/msw/bitmap.cpp +++ b/src/msw/bitmap.cpp @@ -1,12 +1,12 @@ -///////////////////////////////////////////////////////////////////////////// +//////////////////////////////////////////////////////////////////////////// // Name: bitmap.cpp // Purpose: wxBitmap // Author: Julian Smart // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// Copyright: (c) Julian Smart +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -17,7 +17,7 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "bitmap.h" #endif @@ -43,33 +43,161 @@ #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(wxBitmap, wxGDIObject) +IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject) - IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, 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() { - m_quality = 0; +#ifdef __WXDEBUG__ m_selectedInto = NULL; - m_numColors = 0; +#endif m_bitmapMask = NULL; + m_hBitmap = (WXHBITMAP) NULL; +#if wxUSE_WXDIB + m_dib = NULL; +#endif + + m_isDIB = + m_hasAlpha = FALSE; } void wxBitmapRefData::Free() @@ -77,11 +205,15 @@ 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("DeleteObject(hbitmap)"); + wxLogLastError(wxT("DeleteObject(hbitmap)")); } } @@ -97,24 +229,27 @@ void wxBitmapRefData::Free() void wxBitmap::Init() { // m_refData = NULL; done in the base class ctor +} - if ( wxTheBitmapList ) - wxTheBitmapList->AddBitmap(this); +wxGDIImageRefData *wxBitmap::CreateData() const +{ + return new wxBitmapRefData; } #ifdef __WIN32__ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon) { +#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) // it may be either HICON or HCURSOR HICON hicon = (HICON)icon.GetHandle(); ICONINFO iconInfo; if ( !::GetIconInfo(hicon, &iconInfo) ) { - wxLogLastError("GetIconInfo"); + wxLogLastError(wxT("GetIconInfo")); - return FALSE; + return false; } wxBitmapRefData *refData = new wxBitmapRefData; @@ -131,32 +266,17 @@ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon) // the mask returned by GetIconInfo() is inversed compared to the usual // wxWin convention - HBITMAP hbmpMask = ::CreateBitmap(w, h, 1, 1, 0); - - // the icons mask is opposite to the usual wxWin convention - HDC dcSrc = ::CreateCompatibleDC(NULL); - HDC dcDst = ::CreateCompatibleDC(NULL); - (void)SelectObject(dcSrc, iconInfo.hbmMask); - (void)SelectObject(dcDst, hbmpMask); - - HBRUSH brush = ::CreateSolidBrush(RGB(255, 255, 255)); - RECT rect = { 0, 0, w, h }; - FillRect(dcDst, &rect, brush); - - BitBlt(dcDst, 0, 0, w, h, dcSrc, 0, 0, SRCINVERT); + refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h)); - SelectObject(dcDst, NULL); - SelectObject(dcSrc, NULL); - DeleteDC(dcDst); - DeleteDC(dcSrc); - refData->m_bitmapMask = new wxMask((WXHBITMAP)hbmpMask); + // delete the old one now as we don't need it any more + ::DeleteObject(iconInfo.hbmMask); -#if WXWIN_COMPATIBILITY_2 - refData->m_ok = TRUE; -#endif // WXWIN_COMPATIBILITY_2 - - return TRUE; + return true; +#else + wxUnusedVar(icon); + return false; +#endif } #endif // Win32 @@ -168,13 +288,7 @@ bool wxBitmap::CopyFromCursor(const wxCursor& cursor) 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) @@ -184,124 +298,154 @@ bool wxBitmap::CopyFromIcon(const wxIcon& icon) 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(); + return CopyFromIconOrCursor(icon); +} - // copy the icon to the bitmap - ScreenHDC hdcScreen; - HDC hdc = ::CreateCompatibleDC(hdcScreen); - HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height); - HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap); +#ifndef NEVER_USE_DIB - ::DrawIcon(hdc, 0, 0, GetHiconOf(icon)); +bool wxBitmap::CopyFromDIB(const wxDIB& dib) +{ + wxCHECK_MSG( dib.IsOk(), FALSE, _T("invalid DIB in CopyFromDIB") ); - ::SelectObject(hdc, hbmpOld); - ::DeleteDC(hdc); +#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 = width; - refData->m_height = height; - refData->m_depth = wxDisplayDepth(); + refData->m_width = dib.GetWidth(); + refData->m_height = dib.GetHeight(); + refData->m_depth = dib.GetDepth(); refData->m_hBitmap = (WXHBITMAP)hbitmap; -#if WXWIN_COMPATIBILITY_2 - refData->m_ok = TRUE; -#endif // WXWIN_COMPATIBILITY_2 +#if wxUSE_PALETTE + wxPalette *palette = dib.CreatePalette(); + if ( palette ) + { + refData->m_bitmapPalette = *palette; + } + + delete palette; +#endif // wxUSE_PALETTE return TRUE; -#else // Win32 - return CopyFromIconOrCursor(icon); -#endif // Win16/Win32 } +#endif // NEVER_USE_DIB + wxBitmap::~wxBitmap() { - if (wxTheBitmapList) - wxTheBitmapList->DeleteObject(this); } -wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits) +wxBitmap::wxBitmap(const char bits[], int width, int height, int depth) { Init(); +#ifndef __WXMICROWIN__ wxBitmapRefData *refData = new wxBitmapRefData; m_refData = refData; - refData->m_width = the_width; - refData->m_height = the_height; - refData->m_depth = no_bits; - refData->m_numColors = 0; - refData->m_selectedInto = NULL; + 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(the_width, the_height, 1, no_bits, bits); + HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data); if ( !hbmp ) { - wxLogLastError("CreateBitmap"); + wxLogLastError(wxT("CreateBitmap")); + } + + if ( data != bits ) + { + free(data); } SetHBITMAP((WXHBITMAP)hbmp); +#endif } -// GRG, Dic/99 -wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const +// Create from XPM data +#if wxUSE_IMAGE && wxUSE_XPM +bool wxBitmap::CreateFromXpm(const char **data) +#else +bool wxBitmap::CreateFromXpm(const char **WXUNUSED(data)) +#endif { - 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") ); - - // copy bitmap data - HDC dcSrc = ::CreateCompatibleDC(NULL); - HDC dcDst = ::CreateCompatibleDC(NULL); - SelectObject(dcSrc, (HBITMAP) GetHBITMAP()); - SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP()); - BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY); +#if wxUSE_IMAGE && wxUSE_XPM + Init(); - // copy mask if there is one - if (GetMask()) - { - HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0); + wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") ) - SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()); - SelectObject(dcDst, (HBITMAP) hbmpMask); - BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY); + wxXPMDecoder decoder; + wxImage img = decoder.ReadData(data); + wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") ) - wxMask *mask = new wxMask((WXHBITMAP) hbmpMask); - ret.SetMask(mask); - } - - SelectObject(dcDst, NULL); - SelectObject(dcSrc, NULL); - DeleteDC(dcDst); - DeleteDC(dcSrc); - - return ret; + *this = wxBitmap(img); + return TRUE; +#else + return FALSE; +#endif } -// Create from XPM data -wxBitmap::wxBitmap(char **data, wxControl *WXUNUSED(anItem)) +wxBitmap::wxBitmap(int w, int h, int d) { Init(); - (void)Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0); + (void)Create(w, h, d); } -wxBitmap::wxBitmap(int w, int h, int d) +wxBitmap::wxBitmap(int w, int h, const wxDC& dc) { Init(); - (void)Create(w, h, d); + (void)Create(w, h, dc); } wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth) @@ -311,14 +455,26 @@ wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth) (void)Create(data, type, width, height, depth); } -wxBitmap::wxBitmap(const wxString& filename, long type) +wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type) { Init(); LoadFile(filename, (int)type); } -bool wxBitmap::Create(int w, int h, int d) +bool wxBitmap::Create(int width, int height, int depth) +{ + return DoCreate(width, height, depth, 0); +} + +bool wxBitmap::Create(int width, int height, const wxDC& dc) +{ + wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::Create()") ); + + return DoCreate(width, height, -1, dc.GetHDC()); +} + +bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc) { UnRef(); @@ -326,39 +482,423 @@ bool wxBitmap::Create(int w, int h, int d) GetBitmapData()->m_width = w; GetBitmapData()->m_height = h; - GetBitmapData()->m_depth = d; - HBITMAP hbmp; + HBITMAP hbmp wxDUMMY_INITIALIZE(0); - if ( d > 0 ) +#ifndef NEVER_USE_DIB + if ( wxShouldCreateDIB(w, h, d, hdc) ) { - hbmp = ::CreateBitmap(w, h, 1, d, NULL); - if ( !hbmp ) + if ( d == -1 ) { - wxLogLastError("CreateBitmap"); + // create DIBs without alpha channel by default + d = 24; } + + wxDIB dib(w, h, d); + if ( !dib.IsOk() ) + return FALSE; + + // don't delete the DIB section in dib object dtor + hbmp = dib.Detach(); + + GetBitmapData()->m_isDIB = TRUE; + GetBitmapData()->m_depth = d; } - else + else // create a DDB +#endif // NEVER_USE_DIB { - ScreenHDC dc; - hbmp = ::CreateCompatibleBitmap(dc, w, h); - if ( !hbmp ) +#ifndef ALWAYS_USE_DIB +#ifndef __WXMICROWIN__ + if ( d > 0 ) { - wxLogLastError("CreateCompatibleBitmap"); + 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(); + GetBitmapData()->m_depth = wxDisplayDepth(); + } +#endif // !ALWAYS_USE_DIB } SetHBITMAP((WXHBITMAP)hbmp); -#if WXWIN_COMPATIBILITY_2 - GetBitmapData()->m_ok = hbmp != 0; -#endif // WXWIN_COMPATIBILITY_2 - return Ok(); } +#if wxUSE_IMAGE + +// ---------------------------------------------------------------------------- +// wxImage to/from conversions for Microwin +// ---------------------------------------------------------------------------- + +// Microwin versions are so different from normal ones that it really doesn't +// make sense to use #ifdefs inside the function bodies +#ifdef __WXMICROWIN__ + +bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc) +{ + // Set this to 1 to experiment with mask code, + // which currently doesn't work + #define USE_MASKS 0 + + m_refData = new wxBitmapRefData(); + + // Initial attempt at a simple-minded implementation. + // The bitmap will always be created at the screen depth, + // so the 'depth' argument is ignored. + + HDC hScreenDC = ::GetDC(NULL); + int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL); + + HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight()); + HBITMAP hMaskBitmap = NULL; + HBITMAP hOldMaskBitmap = NULL; + HDC hMaskDC = NULL; + unsigned char maskR = 0; + unsigned char maskG = 0; + unsigned char maskB = 0; + + // printf("Created bitmap %d\n", (int) hBitmap); + if (hBitmap == NULL) + { + ::ReleaseDC(NULL, hScreenDC); + return FALSE; + } + HDC hMemDC = ::CreateCompatibleDC(hScreenDC); + + HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap); + ::ReleaseDC(NULL, hScreenDC); + + // created an mono-bitmap for the possible mask + bool hasMask = image.HasMask(); + + if ( hasMask ) + { +#if USE_MASKS + // FIXME: we should be able to pass bpp = 1, but + // GdBlit can't handle a different depth +#if 0 + hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL ); +#else + hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight()); +#endif + maskR = image.GetMaskRed(); + maskG = image.GetMaskGreen(); + maskB = image.GetMaskBlue(); + + if (!hMaskBitmap) + { + hasMask = FALSE; + } + else + { + hScreenDC = ::GetDC(NULL); + hMaskDC = ::CreateCompatibleDC(hScreenDC); + ::ReleaseDC(NULL, hScreenDC); + + hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap); + } +#else + hasMask = FALSE; +#endif + } + + int i, j; + for (i = 0; i < image.GetWidth(); i++) + { + for (j = 0; j < image.GetHeight(); j++) + { + unsigned char red = image.GetRed(i, j); + unsigned char green = image.GetGreen(i, j); + unsigned char blue = image.GetBlue(i, j); + + ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue)); + + if (hasMask) + { + // scan the bitmap for the transparent colour and set the corresponding + // pixels in the mask to BLACK and the rest to WHITE + if (maskR == red && maskG == green && maskB == blue) + ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0)); + else + ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255)); + } + } + } + + ::SelectObject(hMemDC, hOldBitmap); + ::DeleteDC(hMemDC); + if (hasMask) + { + ::SelectObject(hMaskDC, hOldMaskBitmap); + ::DeleteDC(hMaskDC); + + ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap); + } + + SetWidth(image.GetWidth()); + SetHeight(image.GetHeight()); + SetDepth(screenDepth); + SetHBITMAP( (WXHBITMAP) hBitmap ); + +#if wxUSE_PALETTE + // Copy the palette from the source image + SetPalette(image.GetPalette()); +#endif // wxUSE_PALETTE + + return TRUE; +} + +wxImage wxBitmap::ConvertToImage() const +{ + // Initial attempt at a simple-minded implementation. + // The bitmap will always be created at the screen depth, + // so the 'depth' argument is ignored. + // TODO: transparency (create a mask image) + + if (!Ok()) + { + wxFAIL_MSG( wxT("bitmap is invalid") ); + return wxNullImage; + } + + wxImage image; + + wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") ); + + // create an wxImage object + int width = GetWidth(); + int height = GetHeight(); + image.Create( width, height ); + unsigned char *data = image.GetData(); + if( !data ) + { + wxFAIL_MSG( wxT("could not allocate data for image") ); + return wxNullImage; + } + + HDC hScreenDC = ::GetDC(NULL); + + HDC hMemDC = ::CreateCompatibleDC(hScreenDC); + ::ReleaseDC(NULL, hScreenDC); + + HBITMAP hBitmap = (HBITMAP) GetHBITMAP(); + + HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap); + + int i, j; + for (i = 0; i < GetWidth(); i++) + { + for (j = 0; j < GetHeight(); j++) + { + COLORREF color = ::GetPixel(hMemDC, i, j); + unsigned char red = GetRValue(color); + unsigned char green = GetGValue(color); + unsigned char blue = GetBValue(color); + + image.SetRGB(i, j, red, green, blue); + } + } + + ::SelectObject(hMemDC, hOldBitmap); + ::DeleteDC(hMemDC); + +#if wxUSE_PALETTE + // Copy the palette from the source image + if (GetPalette()) + image.SetPalette(* GetPalette()); +#endif // wxUSE_PALETTE + + return image; +} + +#endif // __WXMICROWIN__ + +// ---------------------------------------------------------------------------- +// wxImage to/from conversions +// ---------------------------------------------------------------------------- + +#if wxUSE_WXDIB + +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) +{ + 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 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(); + + refData->m_isDIB = TRUE; + refData->m_depth = dib.GetDepth(); + } +#ifndef ALWAYS_USE_DIB + else // we need to convert DIB to DDB + { + hbitmap = dib.CreateDDB((HDC)hdc); + + refData->m_depth = depth == -1 ? dib.GetDepth() : depth; + } +#endif // !ALWAYS_USE_DIB + + // 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; +} + +wxImage wxBitmap::ConvertToImage() const +{ + // 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); + } + } + + return image; +} + +#endif // wxUSE_WXDIB + +#endif // wxUSE_IMAGE + +// ---------------------------------------------------------------------------- +// loading and saving bitmaps +// ---------------------------------------------------------------------------- + bool wxBitmap::LoadFile(const wxString& filename, long type) { UnRef(); @@ -371,16 +911,20 @@ bool wxBitmap::LoadFile(const wxString& filename, long type) return handler->LoadFile(this, filename, type, -1, -1); } - else +#if wxUSE_IMAGE + else // no bitmap handler found { wxImage image; - if ( !image.LoadFile( filename, type ) || !image.Ok() ) - return FALSE; - - *this = image.ConvertToBitmap(); + if ( image.LoadFile( filename, type ) && image.Ok() ) + { + *this = wxBitmap(image); - return TRUE; + return TRUE; + } } +#endif // wxUSE_IMAGE + + return FALSE; } bool wxBitmap::Create(void *data, long type, int width, int height, int depth) @@ -391,8 +935,7 @@ bool wxBitmap::Create(void *data, long type, int width, int height, int depth) if ( !handler ) { - wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for " - "type %d defined."), type); + wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type); return FALSE; } @@ -402,7 +945,9 @@ bool wxBitmap::Create(void *data, long type, int width, int height, int depth) return handler->Create(this, data, type, width, height, depth); } -bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette) +bool wxBitmap::SaveFile(const wxString& filename, + int type, + const wxPalette *palette) { wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler); @@ -410,36 +955,142 @@ bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *pal { return handler->SaveFile(this, filename, type, palette); } - else +#if wxUSE_IMAGE + else // no bitmap handler found { // FIXME what about palette? shouldn't we use it? - wxImage image( *this ); - if (!image.Ok()) - return FALSE; + 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")); + } - return image.SaveFile( filename, type ); + wxMask *mask = new wxMask((WXHBITMAP) hbmpMask); + ret.SetMask(mask); } +#endif // !__WXMICROWIN__ + + return ret; } // ---------------------------------------------------------------------------- // wxBitmap accessors // ---------------------------------------------------------------------------- -void wxBitmap::SetQuality(int q) +#if wxUSE_PALETTE +wxPalette* wxBitmap::GetPalette() const { - EnsureHasData(); + return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette + : (wxPalette *) NULL; +} +#endif - GetBitmapData()->m_quality = q; +wxMask *wxBitmap::GetMask() const +{ + return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL; } -#if WXWIN_COMPATIBILITY_2 -void wxBitmap::SetOk(bool isOk) +#ifdef __WXDEBUG__ + +wxDC *wxBitmap::GetSelectedInto() const { - EnsureHasData(); + return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL; +} - GetBitmapData()->m_ok = isOk; +#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; } -#endif // WXWIN_COMPATIBILITY_2 + +// ---------------------------------------------------------------------------- +// 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) { @@ -448,64 +1099,165 @@ void wxBitmap::SetPalette(const wxPalette& palette) GetBitmapData()->m_bitmapPalette = palette; } +#endif // wxUSE_PALETTE + void wxBitmap::SetMask(wxMask *mask) { EnsureHasData(); - GetBitmapData()->m_bitmapMask = mask; + GetBitmapData()->SetMask(mask); +} + +#if WXWIN_COMPATIBILITY_2_4 + +void wxBitmap::SetQuality(int WXUNUSED(quality)) +{ } -// 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 +#endif // WXWIN_COMPATIBILITY_2_4 + +// ---------------------------------------------------------------------------- +// 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 = (HPALETTE) NULL; - LPBITMAPINFO lpDib; - void *lpBits = (void*) NULL; +#if wxUSE_WXDIB + if ( !Ok() ) + { + // no bitmap, no data (raw or otherwise) + return NULL; + } - if( GetPalette() && GetPalette()->Ok() ) + // 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 ) { - tmpBitmap.SetPalette(*GetPalette()); - memDC.SelectObject(tmpBitmap); - memDC.SetPalette(*GetPalette()); - hPal = (HPALETTE)GetPalette()->GetHPALETTE(); + 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 + else // we're a DIB { - hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE); - wxPalette palette; - palette.SetHPALETTE( (WXHPALETTE)hPal ); - tmpBitmap.SetPalette( palette ); - memDC.SelectObject(tmpBitmap); - memDC.SetPalette( palette ); + hDIB = GetHbitmap(); } - // set the height negative because in a DIB the order of the lines is - // reversed - if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) ) + DIBSECTION ds; + if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) ) { - return wxNullBitmap; + wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") ); + + return NULL; } - lpBits = malloc(lpDib->bmiHeader.biSizeImage); + // check that the bitmap is in correct format + if ( ds.dsBm.bmBitsPixel != bpp ) + { + wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") ); - ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits); + 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; - ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0, - GetWidth(), GetHeight(), - 0, 0, 0, GetHeight(), - lpBits, lpDib, DIB_RGB_COLORS); + // 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; - free(lpBits); + 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; + } - wxFreeDIB(lpDib); + 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); - return tmpBitmap; + const int w = data.GetWidth(); + const int h = data.GetHeight(); + + for ( int y = 0; y < h; y++ ) + { + PixelData::Iterator rowStart = p; + + for ( int x = 0; x < w; x++ ) + { + const unsigned alpha = p.Alpha(); + + p.Red() = (p.Red() * alpha + 127) / 255; + p.Blue() = (p.Blue() * alpha + 127) / 255; + p.Green() = (p.Green() * alpha + 127) / 255; + + ++p; + } + + p = rowStart; + p.OffsetY(data, 1); + } + } + + // if we're a DDB we need to convert DIB back to DDB now to make the + // changes made via raw bitmap access effective + if ( !GetBitmapData()->m_isDIB ) + { + wxDIB *dib = GetBitmapData()->m_dib; + GetBitmapData()->m_dib = NULL; + + // TODO: convert + + delete dib; + } +#endif // wxUSE_WXDIB } +#endif // #ifdef wxHAVE_RAW_BITMAP // ---------------------------------------------------------------------------- // wxMask @@ -548,15 +1300,16 @@ wxMask::~wxMask() // 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(), @@ -572,6 +1325,9 @@ bool wxMask::Create(const wxBitmap& bitmap) SelectObject(destDC, 0); DeleteDC(destDC); return TRUE; +#else + return FALSE; +#endif } // Create a mask from a bitmap and a palette index indicating @@ -583,6 +1339,8 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex) ::DeleteObject((HBITMAP) m_maskBitmap); m_maskBitmap = 0; } + +#if wxUSE_PALETTE if (bitmap.Ok() && bitmap.GetPalette()->Ok()) { unsigned char red, green, blue; @@ -592,6 +1350,8 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex) return Create(bitmap, transparentColour); } } +#endif // wxUSE_PALETTE + return FALSE; } @@ -599,52 +1359,70 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex) // 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; } - if (!bitmap.Ok()) + + 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 ) { - return FALSE; + wxLogLastError(wxT("CreateCompatibleDC")); } - // 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)); - } - } + 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; } - ::SelectObject(srcDC, 0); + + 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, 0); + ::SelectObject(destDC, hbmpDstOld); ::DeleteDC(destDC); - return TRUE; + + return ok; +#else // __WXMICROWIN__ + return FALSE; +#endif // __WXMICROWIN__/!__WXMICROWIN__ } // ---------------------------------------------------------------------------- @@ -658,7 +1436,7 @@ bool wxBitmapHandler::Create(wxGDIImage *image, { wxBitmap *bitmap = wxDynamicCast(image, wxBitmap); - return bitmap ? Create(bitmap, data, width, height, depth) : FALSE; + return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE; } bool wxBitmapHandler::Load(wxGDIImage *image, @@ -711,18 +1489,16 @@ bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap), // 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); @@ -758,5 +1534,129 @@ 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")); + } + 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 +}