Bug 12711 - Alpha blending doesn't add on overlapping rectangles.
Summary: Alpha blending doesn't add on overlapping rectangles.
Status: NEW
Alias: None
Product: Class Libraries
Classification: Mono
Component: libgdiplus ()
Version: 2.10.x
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2013-06-16 21:26 UTC by Martín Coll
Modified: 2013-06-16 21:27 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

test class (620 bytes, text/x-csharp)
2013-06-16 21:26 UTC, Martín Coll
actual rendering (1013 bytes, image/png)
2013-06-16 21:27 UTC, Martín Coll
expected rendering (1012 bytes, image/png)
2013-06-16 21:27 UTC, Martín Coll

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Description Martín Coll 2013-06-16 21:26:09 UTC
Created attachment 4123 [details]
test class

I'm trying to draw overlapping rectangles with semi-transparent colors. When two rectangles overlap, their alphas should blend and add like in the windows library.

I'm attaching a sample code, and I would attach screenshots too if I could.
Comment 1 Martín Coll 2013-06-16 21:27:30 UTC
Created attachment 4124 [details]
actual rendering
Comment 2 Martín Coll 2013-06-16 21:27:54 UTC
Created attachment 4125 [details]
expected rendering