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| author | Bo Xu <bo_xu@foxitsoftware.com> | 2015-01-05 10:11:47 -0800 |
|---|---|---|
| committer | Bo Xu <bo_xu@foxitsoftware.com> | 2015-01-05 10:11:47 -0800 |
| commit | 07f10ae2eede1ad1fbb4424064eaaaa77dfb90d2 (patch) | |
| tree | 94b66b4acb8a6f2f20a292505e6bfb79acb79085 | |
| parent | d66051b5edfee0279b504b49f7d167f03c17c6dd (diff) | |
| download | pdfium-07f10ae2eede1ad1fbb4424064eaaaa77dfb90d2.tar.xz | |
In windows printing, convert src bitmap to dest bitmap using CompositeBitmap.
When dealing with transparency, the printing procedure will generate a bitmap first,
then draw this bitmap in windows DC.
The format of source bitmap is argb, but the destination bitmap is rgb.
Simply doing memcpy will lose the alpha channel information, so CompositeBitmap function is needed.
BUG=412908
R=vitalybuka@chromium.org
Review URL: https://codereview.chromium.org/826633002
| -rw-r--r-- | fpdfsdk/src/fpdfview.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fpdfsdk/src/fpdfview.cpp b/fpdfsdk/src/fpdfview.cpp index d8ec8c676a..653702382c 100644 --- a/fpdfsdk/src/fpdfview.cpp +++ b/fpdfsdk/src/fpdfview.cpp @@ -383,9 +383,10 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int if (WinDC.GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) { CFX_DIBitmap* pDst = FX_NEW CFX_DIBitmap; - pDst->Create(pBitmap->GetWidth(), pBitmap->GetHeight(),FXDIB_Rgb32); - FXSYS_memcpy(pDst->GetBuffer(), pBitmap->GetBuffer(), pBitmap->GetPitch()*pBitmap->GetHeight()); -// WinDC.SetDIBits(pDst,0,0); + int pitch = pBitmap->GetPitch(); + pDst->Create(size_x, size_y, FXDIB_Rgb32); + FXSYS_memset(pDst->GetBuffer(), -1, pitch*size_y); + pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap, 0, 0, FXDIB_BLEND_NORMAL, NULL, FALSE, NULL); WinDC.StretchDIBits(pDst,0,0,size_x,size_y); delete pDst; } |