Move working tests to new directory

These are tests that are working on both GL and Cairo now.

Some tests got black boxes over the areas that aren't easy to compare.

testsuite/gsk/compare/clipped_rounded_clip.node

@@ -0,0 +1,41 @@
+color {
+  color: white;
+  bounds: 50 70 80 90;
+}
+
+clip {
+  clip: 60 80 60 70;
+  child: rounded-clip {
+    clip: 20 50 100 100 / 50;
+    child: color {
+      bounds: 20 50 100 100;
+      color: red;
+    }
+  }
+}
+
+debug {
+  message: "clipped out area";
+  child: container {
+    color {
+      bounds: 115 80 5 45;
+      color: black;
+    }
+    color {
+      bounds: 110 121 5 11;
+      color: black;
+    }
+    color {
+      bounds: 99 129 11 11;
+      color: black;
+    }
+    color {
+      bounds: 91 140 11 5;
+      color: black;
+    }
+    color {
+      bounds: 60 145 35 5;
+      color: black;
+    }
+  }
+}

testsuite/gsk/compare/opacity_clip.node

@@ -0,0 +1,36 @@
+color {
+  bounds: 40 40 70 70;
+  color: transparent;
+}
+
+clip {
+  clip: 50 50 50 50;
+  child: opacity {
+    opacity: 0.4;
+    child: rounded-clip {
+      clip: 50 50 100 100 / 50;
+      child: color {
+        bounds: 50 50 100 100;
+        color: red;
+      }
+    }
+  }
+}
+
+debug {
+  message: "clipped out area";
+  child: container {
+    color {
+      bounds: 50 70 10 30;
+      color: black;
+    }
+    color {
+      bounds: 55 55 20 20;
+      color: black;
+    }
+    color {
+      bounds: 70 50 30 10;
+      color: black;
+    }
+  }
+}

testsuite/gsk/gl/clipped_rounded_clip.txt

@@ -1,10 +0,0 @@
-clip {
-  clip: 60 80 60 70;
-  child: rounded-clip {
-    clip: 20 50 100 100 / 50;
-    child: color {
-      bounds: 20 50 100 100;
-      color: red;
-    }
-  }
-}

testsuite/gsk/gl/opacity_clip.txt

@@ -1,13 +0,0 @@
-clip {
-  clip: 50 50 50 50;
-  child: opacity {
-    opacity: 0.4;
-    child: rounded-clip {
-      clip: 50 50 100 100 / 50;
-      child: color {
-        bounds: 50 50 100 100;
-        color: red;
-      }
-    }
-  }
-}

testsuite/gsk/meson.build

@@ -40,21 +40,14 @@ test('nodes (cairo)', test_render_nodes,
 
 # Interesting render nodes proven to be rendered 'correctly' by the GL renderer.
 gl_tests = [
-  ['outset shadow simple',         'outset_shadow_simple'],
-  ['outset shadow offset x',       'outset_shadow_offsetx'],
-  ['outset shadow offset y',       'outset_shadow_offsety'],
-  ['outset shadow offset both',    'outset_shadow_offset_both'],
   ['outset shadow rounded1',       'outset_shadow_rounded1'],
   ['outset shadow rounded2',       'outset_shadow_rounded2'],
-  ['outset shadow rounded top',    'outset_shadow_rounded_top'],
   ['outset shadow blurred simple', 'outset_shadow_blurred_simple'],
   ['outset shadow blurred small',  'outset_shadow_blurred_small'],
   ['outset shadow blurred offset', 'outset_shadow_blurred_offset'],
   ['Crossfade simple',             'cross_fade'],
-  ['Clipped rounded clip',         'clipped_rounded_clip'],
   ['gradient simple',              'gradient_simple'],
   ['gradient clipped',             'gradient_clipped'],
-  ['offscreen opacity',            'opacity_clip'],
 ]
 
 foreach gl_test : gl_tests
@@ -72,6 +65,38 @@ foreach gl_test : gl_tests
        suite: 'gsk')
 endforeach
 
+compare_render_tests = [
+  'clipped_rounded_clip',
+  'opacity_clip',
+  'outset_shadow_offset_both',
+  'outset_shadow_offset_x',
+  'outset_shadow_offset_y',
+  'outset_shadow_rounded_top',
+  'outset_shadow_simple',
+]
+
+renderers = [
+  'opengl',
+  'cairo',
+]
+
+foreach renderer : renderers
+  foreach test : compare_render_tests
+    test(renderer + ' ' + test, compare_render,
+         args: [join_paths(meson.current_source_dir(), 'compare', test + '.node'),
+                join_paths(meson.current_source_dir(), 'compare', test + '.png')],
+         env: [ 'GIO_USE_VOLUME_MONITOR=unix',
+                'GSETTINGS_BACKEND=memory',
+                'GTK_CSD=1',
+                'G_ENABLE_DIAGNOSTIC=0',
+                'G_TEST_SRCDIR=@0@'.format(meson.current_source_dir()),
+                'G_TEST_BUILDDIR=@0@'.format(meson.current_build_dir()),
+                'GSK_RENDERER=' + renderer
+              ],
+       suite: [ 'gsk', 'gsk-compare', 'gsk-' + renderer, 'gsk-compare-' + renderer ])
+  endforeach
+endforeach
+
 node_parser_tests = [
   'crash1',
   'crash2',