From 0775432ed9fc0db42efd41f7d3e12345a0315999 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Tue, 6 Aug 2024 00:30:04 -0400
Subject: [PATCH] Add a compare test for premultiplied colors

This test checks a that a specific combination of mask with alpha
inside opacity works as expected. We were treating the mask color
as premultiplied here, although it isn't.
---
 testsuite/gsk/compare/premul-color-nogl.node |  12 ++++++++++++
 testsuite/gsk/compare/premul-color-nogl.png  | Bin 0 -> 174 bytes
 testsuite/gsk/meson.build                    |   1 +
 3 files changed, 13 insertions(+)
 create mode 100644 testsuite/gsk/compare/premul-color-nogl.node
 create mode 100644 testsuite/gsk/compare/premul-color-nogl.png

diff --git a/testsuite/gsk/compare/premul-color-nogl.node b/testsuite/gsk/compare/premul-color-nogl.node
new file mode 100644
index 0000000000..dddb903110
--- /dev/null
+++ b/testsuite/gsk/compare/premul-color-nogl.node
@@ -0,0 +1,12 @@
+opacity {
+  child: mask {
+    source: color {
+      bounds: 0 0 50 50;
+      color: rgba(255,0,0,0.3);
+    }
+    mask: color {
+      bounds: 0 0 50 50;
+      color: rgb(255,255,255);
+    }
+  }
+}
diff --git a/testsuite/gsk/compare/premul-color-nogl.png b/testsuite/gsk/compare/premul-color-nogl.png
new file mode 100644
index 0000000000000000000000000000000000000000..ab374fc6630aab92572bad6dcf37bd773bbfb1cd
GIT binary patch
literal 174
zcmeAS@N?(olHy`uVBq!ia0vp^Mj*_=1|;R|J2nC-#^NA%Cx&(BWL^R}EXkhE0gSv1
zjB_%rK`J9WT^vI)8sDC0<UC*?aNt1v(JT88pLJQ7ct_J?UU}Mi{x!E5mrJZP3`$;d
m%%gXrl(MN?R?ii}0yT$J89S#oHl738!QkoY=d#Wzp$P!OojJ4s

literal 0
HcmV?d00001

diff --git a/testsuite/gsk/meson.build b/testsuite/gsk/meson.build
index 4f449957e0..5f3c550e1d 100644
--- a/testsuite/gsk/meson.build
+++ b/testsuite/gsk/meson.build
@@ -130,6 +130,7 @@ compare_render_tests = [
   'outset_shadow_rounded_top',
   'outset-shadow-scale-offset',
   'outset_shadow_simple',
+  'premul-color-nogl',
   'radial-gradient-with-64-colorstops',
   'repeat',
   'repeating-linear-gradient-edge-colors',