AuroraMiddleware/wxWidgets
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create the DIBs in correct (and not down up) line order

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19709 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2003-03-22 19:01:27 +00:00
parent 916b0ea345
commit bbc1265c40
1 changed files with 10 additions and 3 deletions
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13
src/msw/dib.cpp
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@ -69,7 +69,14 @@ bool wxDIB::Create(int width, int height, int depth)
info->bmiHeader.biSize = infosize;
info->bmiHeader.biWidth = width;
info->bmiHeader.biHeight = -height;
// we use positive height here which corresponds to a DIB with normal, i.e.
// bottom to top, order -- normally using negative height (which means
// reversed for MS and hence natural for all the normal people top to
// bottom line scan order) could be used to avoid the need for the image
// reversal in Create(image) but this doesn't work under NT, only Win9x!
info->bmiHeader.biHeight = height;
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = depth;
info->bmiHeader.biCompression = BI_RGB;
@ -156,8 +163,8 @@ bool wxDIB::Create(const wxImage& image)
if ( !Create(w, h, bpp) )
return false;
// DIBs are stored in bottom to top order so we need to copy bits line by
// line and starting from the end
// DIBs are stored in bottom to top order (see also the comment above in
// Create()) so we need to copy bits line by line and starting from the end
const int srcBytesPerLine = w * 3;
const int dstBytesPerLine = GetLineSize(w, bpp);
const unsigned char *src = image.GetData() + ((h - 1) * srcBytesPerLine);