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Fix vertical alpha adjustment in wxPixelData<wxImage>::Offset().

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Handle "y" parameter correctly when offsetting m_pAlpha, it was just ignored
before, i.e. Offset(x, y) and OffsetY(y) always behaved as if y were 1.
This commit is contained in:
Vadim Zeitlin
2015-04-01 14:20:10 +02:00
parent 2a13ad64d8
commit 62f8950e0e
2 changed files with 3 additions and 2 deletions
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4
include/wx/rawbmp.h
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@@ -381,7 +381,7 @@ struct wxPixelDataOut<wxImage>
{
m_pRGB += data.GetRowStride()*y + PixelFormat::SizePixel*x;
if ( m_pAlpha )
m_pAlpha += data.GetWidth() + x;
m_pAlpha += data.GetWidth()*y + x;
}
// move x pixels to the right (again, no row wrapping)
@@ -397,7 +397,7 @@ struct wxPixelDataOut<wxImage>
{
m_pRGB += data.GetRowStride()*y;
if ( m_pAlpha )
m_pAlpha += data.GetWidth();
m_pAlpha += data.GetWidth()*y;
}
// go to the given position