void wxPrinterDC::DoDrawBitmap(const wxBitmap& bmp,
wxCoord x, wxCoord y,
bool useMask)
{
wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxPrinterDC::DrawBitmap") );
int width = bmp.GetWidth(),
height = bmp.GetHeight();
if ( !(::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHDIB) ||
!DrawBitmapUsingStretchDIBits(GetHdc(), bmp, x, y) )
{
// no support for StretchDIBits() or an error occurred if we got here
wxMemoryDC memDC;
memDC.SelectObject(bmp);
Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
memDC.SelectObject(wxNullBitmap);
}
}
bool wxPrinterDCImpl::DoBlit(wxCoord xdest, wxCoord ydest,
wxCoord width, wxCoord height,
wxDC *source,
wxCoord WXUNUSED(xsrc), wxCoord WXUNUSED(ysrc),
wxRasterOperationMode WXUNUSED(rop), bool useMask,
wxCoord WXUNUSED(xsrcMask), wxCoord WXUNUSED(ysrcMask))
{
wxDCImpl *impl = source->GetImpl();
wxMSWDCImpl *msw_impl = wxDynamicCast(impl, wxMSWDCImpl);
if (!msw_impl)
return false;
wxBitmap& bmp = msw_impl->GetSelectedBitmap();
wxMask *mask = useMask ? bmp.GetMask() : NULL;
if ( mask )
{
// If we are printing source colours are screen colours not printer
// colours and so we need copy the bitmap pixel by pixel.
RECT rect;
HDC dcSrc = GetHdcOf(*msw_impl);
MemoryHDC dcMask(dcSrc);
SelectInHDC selectMask(dcMask, (HBITMAP)mask->GetMaskBitmap());
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
COLORREF cref = ::GetPixel(dcMask, x, y);
if (cref)
{
HBRUSH brush = ::CreateSolidBrush(::GetPixel(dcSrc, x, y));
rect.left = xdest + x;
rect.right = rect.left + 1;
rect.top = ydest + y;
rect.bottom = rect.top + 1;
::FillRect(GetHdc(), &rect, brush);
::DeleteObject(brush);
}
}
}
}
else // no mask
{
if ( !(::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHDIB) ||
!DrawBitmapUsingStretchDIBits(GetHdc(), bmp, xdest, ydest) )
{
// no support for StretchDIBits
// as we are printing, source colours are screen colours not
// printer colours and so we need copy the bitmap pixel by pixel.
HDC dcSrc = GetHdcOf(*msw_impl);
RECT rect;
for (int y = 0; y < height; y++)
{
// optimization: draw identical adjacent pixels together.
for (int x = 0; x < width; x++)
{
COLORREF col = ::GetPixel(dcSrc, x, y);
HBRUSH brush = ::CreateSolidBrush( col );
rect.left = xdest + x;
rect.top = ydest + y;
while( (x + 1 < width) &&
(::GetPixel(dcSrc, x + 1, y) == col ) )
{
++x;
}
rect.right = xdest + x + 1;
rect.bottom = rect.top + 1;
::FillRect((HDC) m_hDC, &rect, brush);
::DeleteObject(brush);
}
}
}
}
return true;
}
