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From 95c0e2be5e09f8e658295ea12f814706664c431f Mon Sep 17 00:00:00 2001
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From: Miklos Vajna <vmiklos@collabora.co.uk>
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Date: Fri, 2 Oct 2015 10:31:35 +0200
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Subject: [PATCH 170/398] vcl tiled rendering: avoid 'Pixel represents color
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values!' warnings
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Which happens e.g. during rendering tiles:
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OutputDevice::BlendBitmapWithAlpha() produces an RGB alpha
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(255,255,255), then tries to set a pixel in the 8bit alpha channel using
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it, so when BitmapReadAccess::SetPixelFor_8BIT_PAL() tries to get the
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color index, we try to get it from a color that is not indexed.
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Let's assume that when the color is not indexed, it's always gray, so it
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doesn't matter what color we pick for the alpha mask needs.
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Change-Id: I325c1d70514fd176fdc9cc39683b444447adf07f
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(cherry picked from commit 4caaa09d4da0f7bd5aa0fae3233d66bd977f185e)
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---
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vcl/source/gdi/bmpacc2.cxx | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/vcl/source/gdi/bmpacc2.cxx b/vcl/source/gdi/bmpacc2.cxx
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index d664c4b769fd..286ea8fca26a 100644
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--- a/vcl/source/gdi/bmpacc2.cxx
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+++ b/vcl/source/gdi/bmpacc2.cxx
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@@ -79,7 +79,11 @@ BitmapColor BitmapReadAccess::GetPixelFor_8BIT_PAL(ConstScanline pScanline, long
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void BitmapReadAccess::SetPixelFor_8BIT_PAL(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask&)
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{
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- pScanline[ nX ] = rBitmapColor.GetIndex();
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+ if (rBitmapColor.IsIndex())
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+ pScanline[ nX ] = rBitmapColor.GetIndex();
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+ else
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+ // Let's hope that the RGB color values equal, so it doesn't matter what do we pick
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+ pScanline[ nX ] = rBitmapColor.GetBlueOrIndex();
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}
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BitmapColor BitmapReadAccess::GetPixelFor_8BIT_TC_MASK(ConstScanline pScanline, long nX, const ColorMask& rMask)
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--
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2.12.0
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