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added debug checks

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20210 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2003-04-14 01:03:04 +00:00
parent 3692b94818
commit 8ffc8f1fb9
1 changed files with 4 additions and 1 deletions
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5
src/msw/dc.cpp
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@@ -2303,7 +2303,7 @@ static void
wxAlphaBlend(wxDC& dc, int xDst, int yDst, int w, int h, const wxBitmap& bmpSrc) wxAlphaBlend(wxDC& dc, int xDst, int yDst, int w, int h, const wxBitmap& bmpSrc)
{ {
// get the destination DC pixels // get the destination DC pixels
wxBitmap bmpDst(w, h, 32); wxBitmap bmpDst(w, h, 32 /* force creating RGBA DIB */);
MemoryHDC hdcMem; MemoryHDC hdcMem;
SelectInHDC select(hdcMem, GetHbitmapOf(bmpDst)); SelectInHDC select(hdcMem, GetHbitmapOf(bmpDst));
@@ -2316,6 +2316,9 @@ wxAlphaBlend(wxDC& dc, int xDst, int yDst, int w, int h, const wxBitmap& bmpSrc)
wxRawBitmapData dataDst(bmpDst), wxRawBitmapData dataDst(bmpDst),
dataSrc(bmpSrc); dataSrc(bmpSrc);
wxCHECK_RET( dataDst && dataSrc,
_T("failed to get raw data in wxAlphaBlend") );
wxRawBitmapIterator pDst(dataDst), wxRawBitmapIterator pDst(dataDst),
pSrc(dataSrc); pSrc(dataSrc);