vcl/unx/gtk3/gdi/gtk3salnativewidgets-gtk.cxx | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
New commits:
commit 92e00f2e536ce0458961d329a3c676acc86249e6
Author: Ivan Timofeev <timofeev....@gmail.com>
Date: Thu Aug 2 16:06:33 2012 +0400
cairo uses pre-multiplied alpha
Change-Id: I6cf04b10bfdd6c7b16761b2aa2f31c1392c49546
diff --git a/vcl/unx/gtk3/gdi/gtk3salnativewidgets-gtk.cxx
b/vcl/unx/gtk3/gdi/gtk3salnativewidgets-gtk.cxx
index 5e0972f..4298493 100644
--- a/vcl/unx/gtk3/gdi/gtk3salnativewidgets-gtk.cxx
+++ b/vcl/unx/gtk3/gdi/gtk3salnativewidgets-gtk.cxx
@@ -972,9 +972,9 @@ void GtkSalGraphics::renderAreaToPix( cairo_t *cr,
for (int x = 0; x < awidth && y < aheight; ++x)
{
double alpha = ((float)cairo_data[x*4 + 3])/255.0;
- src[x*3 + 0] = src[x*3 + 0] * (1.0 - alpha) + cairo_data[x*4+0] *
alpha;
- src[x*3 + 1] = src[x*3 + 1] * (1.0 - alpha) + cairo_data[x*4+1] *
alpha;
- src[x*3 + 2] = src[x*3 + 2] * (1.0 - alpha) + cairo_data[x*4+2] *
alpha;
+ src[x*3 + 0] = src[x*3 + 0] * (1.0 - alpha) + cairo_data[x*4+0];
+ src[x*3 + 1] = src[x*3 + 1] * (1.0 - alpha) + cairo_data[x*4+1];
+ src[x*3 + 2] = src[x*3 + 2] * (1.0 - alpha) + cairo_data[x*4+2];
}
src += nStride;
cairo_data += cairo_stride;
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