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use DIB, not DDB, when converting from an image with alpha channel

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20570 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2003-05-09 23:54:16 +00:00
parent edf8e8e071
commit 4b8ab2f93a
1 changed files with 3 additions and 1 deletions
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4
src/msw/bitmap.cpp
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@@ -790,7 +790,9 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc )
HBITMAP hbitmap; HBITMAP hbitmap;
// are we going to use DIB? // are we going to use DIB?
if ( wxShouldCreateDIB(w, h, depth, hdc) ) //
// NB: DDBs don't support alpha so if we have alpha channel we must use DIB
if ( image.HasAlpha() || wxShouldCreateDIB(w, h, depth, hdc) )
{ {
// don't delete the DIB section in dib object dtor // don't delete the DIB section in dib object dtor
hbitmap = dib.Detach(); hbitmap = dib.Detach();