#include "wx/msw/dib.h"
#include "wx/image.h"
+// missing from mingw32 header
+#ifndef CLR_INVALID
+ #define CLR_INVALID ((COLORREF)-1)
+#endif // no CLR_INVALID
+
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
-#if !USE_SHARED_LIBRARIES
- 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)
-#endif
+IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
// ============================================================================
// implementation
{
if ( !::DeleteObject((HBITMAP)m_hBitmap) )
{
- wxLogLastError("DeleteObject(hbitmap)");
+ wxLogLastError(wxT("DeleteObject(hbitmap)"));
}
}
ICONINFO iconInfo;
if ( !::GetIconInfo(hicon, &iconInfo) )
{
- wxLogLastError("GetIconInfo");
+ wxLogLastError(wxT("GetIconInfo"));
return FALSE;
}
// 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);
-
- SelectObject(dcDst, NULL);
- SelectObject(dcSrc, NULL);
- DeleteDC(dcDst);
- DeleteDC(dcSrc);
-
- refData->m_bitmapMask = new wxMask((WXHBITMAP)hbmpMask);
+ refData->m_bitmapMask = new wxMask((WXHBITMAP)
+ wxInvertMask(iconInfo.hbmMask, w, h));
#if WXWIN_COMPATIBILITY_2
refData->m_ok = TRUE;
wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
return FALSE;
-#endif // Win16
-
+#else
return CopyFromIconOrCursor(cursor);
+#endif // Win16
}
bool wxBitmap::CopyFromIcon(const wxIcon& icon)
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();
wxBitmapRefData *refData = new wxBitmapRefData;
m_refData = refData;
- refData->m_width = the_width;
- refData->m_height = the_height;
- refData->m_depth = no_bits;
+ refData->m_width = width;
+ refData->m_height = height;
+ refData->m_depth = depth;
refData->m_numColors = 0;
refData->m_selectedInto = NULL;
- HBITMAP hbmp = ::CreateBitmap(the_width, the_height, 1, no_bits, bits);
+ 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!
+ static const size_t bytesPerLine = (width + 7) / 8;
+ static const size_t padding = bytesPerLine % 2;
+ static const size_t len = height * ( padding + bytesPerLine );
+ data = (char *)malloc(len);
+ const char *src = bits;
+ char *dst = data;
+
+ for ( int rows = 0; rows < height; rows++ )
+ {
+ for ( size_t cols = 0; cols < bytesPerLine; cols++ )
+ {
+ unsigned char val = *src++;
+ unsigned char reversed = 0;
+
+ for ( int bits = 0; bits < 8; bits++)
+ {
+ reversed <<= 1;
+ reversed |= (val & 0x01);
+ val >>= 1;
+ }
+ *dst++ = reversed;
+ }
+
+ if ( padding )
+ *dst++ = 0;
+ }
+ }
+ else
+ {
+ // bits should already be in Windows standard format
+ data = (char *)bits; // const_cast is harmless
+ }
+
+ HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
if ( !hbmp )
{
- wxLogLastError("CreateBitmap");
+ wxLogLastError(wxT("CreateBitmap"));
+ }
+
+ if ( data != bits )
+ {
+ free(data);
}
SetHBITMAP((WXHBITMAP)hbmp);
}
// Create from XPM data
-wxBitmap::wxBitmap(char **data, wxControl *WXUNUSED(anItem))
+bool wxBitmap::CreateFromXpm(const char **data)
{
Init();
- (void)Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
+ return Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
}
wxBitmap::wxBitmap(int w, int h, int d)
(void)Create(data, type, width, height, depth);
}
-wxBitmap::wxBitmap(const wxString& filename, long type)
+wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
{
Init();
hbmp = ::CreateBitmap(w, h, 1, d, NULL);
if ( !hbmp )
{
- wxLogLastError("CreateBitmap");
+ wxLogLastError(wxT("CreateBitmap"));
}
}
else
hbmp = ::CreateCompatibleBitmap(dc, w, h);
if ( !hbmp )
{
- wxLogLastError("CreateCompatibleBitmap");
+ wxLogLastError(wxT("CreateCompatibleBitmap"));
}
GetBitmapData()->m_depth = wxDisplayDepth();
return Ok();
}
+// ----------------------------------------------------------------------------
+// wxImage to/from conversions
+// ----------------------------------------------------------------------------
+
+#if wxUSE_IMAGE
+
+bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
+{
+ wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
+
+ m_refData = new wxBitmapRefData();
+
+ // sizeLimit is the MS upper limit for the DIB size
+#ifdef WIN32
+ int sizeLimit = 1024*768*3;
+#else
+ int sizeLimit = 0x7fff ;
+#endif
+
+ // width and height of the device-dependent bitmap
+ int width = image.GetWidth();
+ int bmpHeight = image.GetHeight();
+
+ // calc the number of bytes per scanline and padding
+ int bytePerLine = width*3;
+ int sizeDWORD = sizeof( DWORD );
+ int lineBoundary = bytePerLine % sizeDWORD;
+ int padding = 0;
+ if( lineBoundary > 0 )
+ {
+ padding = sizeDWORD - lineBoundary;
+ bytePerLine += padding;
+ }
+ // calc the number of DIBs and heights of DIBs
+ int numDIB = 1;
+ int hRemain = 0;
+ int height = sizeLimit/bytePerLine;
+ if( height >= bmpHeight )
+ height = bmpHeight;
+ else
+ {
+ numDIB = bmpHeight / height;
+ hRemain = bmpHeight % height;
+ if( hRemain >0 ) numDIB++;
+ }
+
+ // set bitmap parameters
+ wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
+ SetWidth( width );
+ SetHeight( bmpHeight );
+ if (depth == -1) depth = wxDisplayDepth();
+ SetDepth( depth );
+
+ // create a DIB header
+ int headersize = sizeof(BITMAPINFOHEADER);
+ BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
+ wxCHECK_MSG( lpDIBh, FALSE, wxT("could not allocate memory for DIB header") );
+ // Fill in the DIB header
+ lpDIBh->bmiHeader.biSize = headersize;
+ lpDIBh->bmiHeader.biWidth = (DWORD)width;
+ lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
+ lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
+ // the general formula for biSizeImage:
+ // ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
+ lpDIBh->bmiHeader.biPlanes = 1;
+ lpDIBh->bmiHeader.biBitCount = 24;
+ lpDIBh->bmiHeader.biCompression = BI_RGB;
+ lpDIBh->bmiHeader.biClrUsed = 0;
+ // These seem not really needed for our purpose here.
+ lpDIBh->bmiHeader.biClrImportant = 0;
+ lpDIBh->bmiHeader.biXPelsPerMeter = 0;
+ lpDIBh->bmiHeader.biYPelsPerMeter = 0;
+ // memory for DIB data
+ unsigned char *lpBits;
+ lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
+ if( !lpBits )
+ {
+ wxFAIL_MSG( wxT("could not allocate memory for DIB") );
+ free( lpDIBh );
+ return FALSE;
+ }
+
+ // create and set the device-dependent bitmap
+ HDC hdc = ::GetDC(NULL);
+ HDC memdc = ::CreateCompatibleDC( hdc );
+ HBITMAP hbitmap;
+ hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
+ ::SelectObject( memdc, hbitmap);
+
+ HPALETTE hOldPalette = 0;
+ if (image.GetPalette().Ok())
+ {
+ hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
+ ::RealizePalette(memdc);
+ }
+
+ // copy image data into DIB data and then into DDB (in a loop)
+ unsigned char *data = image.GetData();
+ int i, j, n;
+ int origin = 0;
+ unsigned char *ptdata = data;
+ unsigned char *ptbits;
+
+ for( n=0; n<numDIB; n++ )
+ {
+ if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
+ {
+ // redefine height and size of the (possibly) last smaller DIB
+ // memory is not reallocated
+ height = hRemain;
+ lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
+ lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
+ }
+ ptbits = lpBits;
+
+ for( j=0; j<height; j++ )
+ {
+ for( i=0; i<width; i++ )
+ {
+ *(ptbits++) = *(ptdata+2);
+ *(ptbits++) = *(ptdata+1);
+ *(ptbits++) = *(ptdata );
+ ptdata += 3;
+ }
+ for( i=0; i< padding; i++ ) *(ptbits++) = 0;
+ }
+ ::StretchDIBits( memdc, 0, origin, width, height,\
+ 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
+ origin += height;
+ // if numDIB = 1, lines below can also be used
+ // hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
+ // The above line is equivalent to the following two lines.
+ // hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
+ // ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
+ // or the following lines
+ // hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
+ // HDC memdc = ::CreateCompatibleDC( hdc );
+ // ::SelectObject( memdc, hbitmap);
+ // ::SetDIBitsToDevice( memdc, 0, 0, width, height,
+ // 0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
+ // ::SelectObject( memdc, 0 );
+ // ::DeleteDC( memdc );
+ }
+ SetHBITMAP( (WXHBITMAP) hbitmap );
+
+ if (hOldPalette)
+ SelectPalette(memdc, hOldPalette, FALSE);
+
+ // similarly, created an mono-bitmap for the possible mask
+ if( image.HasMask() )
+ {
+ hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
+ HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap);
+ if( numDIB == 1 ) height = bmpHeight;
+ else height = sizeLimit/bytePerLine;
+ lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
+ lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
+ origin = 0;
+ unsigned char r = image.GetMaskRed();
+ unsigned char g = image.GetMaskGreen();
+ unsigned char b = image.GetMaskBlue();
+ unsigned char zero = 0, one = 255;
+ ptdata = data;
+ for( n=0; n<numDIB; n++ )
+ {
+ if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
+ {
+ // redefine height and size of the (possibly) last smaller DIB
+ // memory is not reallocated
+ height = hRemain;
+ lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
+ lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
+ }
+ ptbits = lpBits;
+ for( int j=0; j<height; j++ )
+ {
+ for(i=0; i<width; i++ )
+ {
+ // was causing a code gen bug in cw : if( ( cr !=r) || (cg!=g) || (cb!=b) )
+ unsigned char cr = (*(ptdata++)) ;
+ unsigned char cg = (*(ptdata++)) ;
+ unsigned char cb = (*(ptdata++)) ;
+
+ if( ( cr !=r) || (cg!=g) || (cb!=b) )
+ {
+ *(ptbits++) = one;
+ *(ptbits++) = one;
+ *(ptbits++) = one;
+ }
+ else
+ {
+ *(ptbits++) = zero;
+ *(ptbits++) = zero;
+ *(ptbits++) = zero;
+ }
+ }
+ for( i=0; i< padding; i++ ) *(ptbits++) = zero;
+ }
+ ::StretchDIBits( memdc, 0, origin, width, height,\
+ 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
+ origin += height;
+ }
+ // create a wxMask object
+ wxMask *mask = new wxMask();
+ mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
+ SetMask( mask );
+ // It will be deleted when the wxBitmap object is deleted (as of 01/1999)
+ /* The following can also be used but is slow to run
+ wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
+ wxMask *mask = new wxMask( *this, colour );
+ SetMask( mask );
+ */
+
+ ::SelectObject( memdc, hbmpOld );
+ }
+
+ // free allocated resources
+ ::DeleteDC( memdc );
+ ::ReleaseDC(NULL, hdc);
+ free(lpDIBh);
+ free(lpBits);
+
+#if WXWIN_COMPATIBILITY_2
+ // check the wxBitmap object
+ GetBitmapData()->SetOk();
+#endif // WXWIN_COMPATIBILITY_2
+
+ if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
+
+ return TRUE;
+}
+
+wxImage wxBitmap::ConvertToImage() const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
+
+ // create an wxImage object
+ int width = GetWidth();
+ int height = GetHeight();
+ image.Create( width, height );
+ unsigned char *data = image.GetData();
+ if( !data )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for image") );
+ return wxNullImage;
+ }
+
+ // calc the number of bytes per scanline and padding in the DIB
+ int bytePerLine = width*3;
+ int sizeDWORD = sizeof( DWORD );
+ int lineBoundary = bytePerLine % sizeDWORD;
+ int padding = 0;
+ if( lineBoundary > 0 )
+ {
+ padding = sizeDWORD - lineBoundary;
+ bytePerLine += padding;
+ }
+
+ // create a DIB header
+ int headersize = sizeof(BITMAPINFOHEADER);
+ BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
+ if( !lpDIBh )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for DIB header") );
+ free( data );
+ return wxNullImage;
+ }
+ // Fill in the DIB header
+ lpDIBh->bmiHeader.biSize = headersize;
+ lpDIBh->bmiHeader.biWidth = width;
+ lpDIBh->bmiHeader.biHeight = -height;
+ lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
+ lpDIBh->bmiHeader.biPlanes = 1;
+ lpDIBh->bmiHeader.biBitCount = 24;
+ lpDIBh->bmiHeader.biCompression = BI_RGB;
+ lpDIBh->bmiHeader.biClrUsed = 0;
+ // These seem not really needed for our purpose here.
+ lpDIBh->bmiHeader.biClrImportant = 0;
+ lpDIBh->bmiHeader.biXPelsPerMeter = 0;
+ lpDIBh->bmiHeader.biYPelsPerMeter = 0;
+ // memory for DIB data
+ unsigned char *lpBits;
+ lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
+ if( !lpBits )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for DIB") );
+ free( data );
+ free( lpDIBh );
+ return wxNullImage;
+ }
+
+ // copy data from the device-dependent bitmap to the DIB
+ HDC hdc = ::GetDC(NULL);
+ HBITMAP hbitmap;
+ hbitmap = (HBITMAP) GetHBITMAP();
+ ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
+
+ // copy DIB data into the wxImage object
+ int i, j;
+ unsigned char *ptdata = data;
+ unsigned char *ptbits = lpBits;
+ for( i=0; i<height; i++ )
+ {
+ for( j=0; j<width; j++ )
+ {
+ *(ptdata++) = *(ptbits+2);
+ *(ptdata++) = *(ptbits+1);
+ *(ptdata++) = *(ptbits );
+ ptbits += 3;
+ }
+ ptbits += padding;
+ }
+
+ // similarly, set data according to the possible mask bitmap
+ if( GetMask() && GetMask()->GetMaskBitmap() )
+ {
+ hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
+ // memory DC created, color set, data copied, and memory DC deleted
+ HDC memdc = ::CreateCompatibleDC( hdc );
+ ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
+ ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
+ ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
+ ::DeleteDC( memdc );
+ // background color set to RGB(16,16,16) in consistent with wxGTK
+ unsigned char r=16, g=16, b=16;
+ ptdata = data;
+ ptbits = lpBits;
+ for( i=0; i<height; i++ )
+ {
+ for( j=0; j<width; j++ )
+ {
+ if( *ptbits != 0 )
+ ptdata += 3;
+ else
+ {
+ *(ptdata++) = r;
+ *(ptdata++) = g;
+ *(ptdata++) = b;
+ }
+ ptbits += 3;
+ }
+ ptbits += padding;
+ }
+ image.SetMaskColour( r, g, b );
+ image.SetMask( TRUE );
+ }
+ else
+ {
+ image.SetMask( FALSE );
+ }
+ // free allocated resources
+ ::ReleaseDC(NULL, hdc);
+ free(lpDIBh);
+ free(lpBits);
+
+ return image;
+}
+
+#endif // wxUSE_IMAGE
+
bool wxBitmap::LoadFile(const wxString& filename, long type)
{
UnRef();
return handler->LoadFile(this, filename, type, -1, -1);
}
+#if wxUSE_IMAGE
else
{
wxImage image;
- if ( !image.LoadFile( filename, type ) || !image.Ok() )
- return FALSE;
-
- *this = image.ConvertToBitmap();
+ if ( image.LoadFile( filename, type ) && image.Ok() )
+ {
+ *this = image.ConvertToBitmap();
- return TRUE;
+ return TRUE;
+ }
}
+#endif // wxUSE_IMAGE
+
+ return FALSE;
}
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 %d defined."), type);
return FALSE;
}
{
return handler->SaveFile(this, filename, type, palette);
}
+#if wxUSE_IMAGE
else
{
// FIXME what about palette? shouldn't we use it?
wxImage image( *this );
- if (!image.Ok())
- return FALSE;
+ 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, 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);
+
+ // copy mask if there is one
+ if (GetMask())
+ {
+ HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
+
+ SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap());
+ SelectObject(dcDst, (HBITMAP) hbmpMask);
+ BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
- return image.SaveFile( filename, type );
+ wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
+ ret.SetMask(mask);
}
+
+ SelectObject(dcDst, NULL);
+ SelectObject(dcSrc, NULL);
+ DeleteDC(dcDst);
+ DeleteDC(dcSrc);
+
+ return ret;
}
// ----------------------------------------------------------------------------
wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
{
wxMemoryDC memDC;
- wxBitmap tmpBitmap(this->GetWidth(), this->GetHeight(), dc.GetDepth());
+ wxBitmap tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
HPALETTE hPal = (HPALETTE) NULL;
LPBITMAPINFO lpDib;
void *lpBits = (void*) NULL;
// Create a mask from a mono bitmap (copies the bitmap).
bool wxMask::Create(const wxBitmap& bitmap)
{
+ 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(),
// the transparent area
bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
{
+ 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 = wxColourToRGB(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++)
+ bool ok = TRUE;
+
+ HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
+ if ( !hbmpSrcOld )
+ {
+ wxLogLastError(wxT("SelectObject"));
+
+ ok = FALSE;
+ }
+
+ HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
+ if ( !hbmpDstOld )
+ {
+ wxLogLastError(wxT("SelectObject"));
+
+ ok = FALSE;
+ }
+
+ // this is not very efficient, but I can't think of a better way of doing
+ // it
+ for ( int w = 0; ok && (w < width); w++ )
+ {
+ for ( int h = 0; ok && (h < height); h++ )
{
COLORREF col = GetPixel(srcDC, w, h);
- if (col == maskColour)
+ if ( col == CLR_INVALID )
+ {
+ wxLogLastError(wxT("GetPixel"));
+
+ // doesn't make sense to continue
+ ok = FALSE;
+
+ break;
+ }
+
+ if ( col == maskColour )
{
::SetPixel(destDC, w, h, RGB(0, 0, 0));
}
}
}
}
- ::SelectObject(srcDC, 0);
+
+ ::SelectObject(srcDC, hbmpSrcOld);
::DeleteDC(srcDC);
- ::SelectObject(destDC, 0);
+ ::SelectObject(destDC, hbmpDstOld);
::DeleteDC(destDC);
- return TRUE;
+
+ return ok;
}
// ----------------------------------------------------------------------------
{
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,
free(lpDIBHeader);
}
+// ----------------------------------------------------------------------------
+// other helper functions
+// ----------------------------------------------------------------------------
+
+extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
+{
+ wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
+
+ // get width/height from the bitmap if not given
+ if ( !w || !h )
+ {
+ BITMAP bm;
+ ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
+ w = bm.bmWidth;
+ h = bm.bmHeight;
+ }
+
+ HDC hdcSrc = ::CreateCompatibleDC(NULL);
+ HDC hdcDst = ::CreateCompatibleDC(NULL);
+ if ( !hdcSrc || !hdcDst )
+ {
+ wxLogLastError(wxT("CreateCompatibleDC"));
+ }
+
+ HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
+ if ( !hbmpInvMask )
+ {
+ wxLogLastError(wxT("CreateBitmap"));
+ }
+
+ ::SelectObject(hdcSrc, hbmpMask);
+ ::SelectObject(hdcDst, hbmpInvMask);
+ if ( !::BitBlt(hdcDst, 0, 0, w, h,
+ hdcSrc, 0, 0,
+ NOTSRCCOPY) )
+ {
+ wxLogLastError(wxT("BitBlt"));
+ }
+
+ ::DeleteDC(hdcSrc);
+ ::DeleteDC(hdcDst);
+ return hbmpInvMask;
+}
projects / wxWidgets.git / blobdiff