testsuite: Add clip-translate-offscreen test

This was an experiment where an offscreen was translated inside an
existing clip.

Because renderers try to limit offscreens to the clip rect, this is
interesting, because they might get the translation wrong.

3 files changed, 18 insertions, 0 deletions

diff --git a/testsuite/gsk/compare/clip-translate-offscreen.node b/testsuite/gsk/compare/clip-translate-offscreen.node
new file mode 100644
index 0000000000..b5313e3de5
--- /dev/null
+++ b/testsuite/gsk/compare/clip-translate-offscreen.node
@@ -0,0 +1,17 @@
+color {
+  bounds: 0 0 50 50;
+  color: rgb(0,0,0);
+}
+clip {
+  clip: 10 10 30 30;
+  child: transform {
+    transform: translate(10, 10);
+    child: opacity {
+      opacity: 0.8;
+      child: color {
+        bounds: -50 -50 100 100;
+        color: rgb(255,0,0);
+      }
+    }
+  }
+}
diff --git a/testsuite/gsk/compare/clip-translate-offscreen.png b/testsuite/gsk/compare/clip-translate-offscreen.png
new file mode 100644
index 0000000000..9fe22b0b47
--- /dev/null
+++ b/testsuite/gsk/compare/clip-translate-offscreen.png
diff --git a/testsuite/gsk/meson.build b/testsuite/gsk/meson.build
index 53a5f6cc46..999e955ce5 100644
--- a/testsuite/gsk/meson.build
+++ b/testsuite/gsk/meson.build
@@ -31,6 +31,7 @@ compare_render_tests = [
   'clipped-repeat-3d-ngl',
   'clipped_rounded_clip',
   'clip-nested1',
+  'clip-translate-offscreen',
   'color-blur0',
   'color-matrix-identity',
   'color-matrix-parsing',