WIP: GPU-accelerated trapezoidal path renderer.

samplecode/SampleConcavePaths.cpp

Index: samplecode/SampleConcavePaths.cpp
diff --git a/samplecode/SampleConcavePaths.cpp b/samplecode/SampleConcavePaths.cpp
index fb5447efc76673c3af946af4eeedcf4013262f5b..de8389ab780b350989ce1f3ee4b3681e7a2839fc 100644
--- a/samplecode/SampleConcavePaths.cpp
+++ b/samplecode/SampleConcavePaths.cpp
@@ -135,6 +135,50 @@ protected:
             canvas->drawPath(path, paint);
             canvas->restore();
         }
+        if (1) {
+            SkPath path;
+            canvas->save();
+            canvas->translate(300, 100);
+            path.moveTo(30, 20);
+            path.lineTo(50, 80);
+            path.lineTo(70, 20);
+            path.lineTo(20, 57);
+            path.lineTo(80, 57);
+            path.close();
+            canvas->drawPath(path, paint);
+            canvas->restore();
+        }
+        // Quadratic path test.
+        if (1) {
+            SkPath path;
+            canvas->save();
+            canvas->translate(0, 200);
+            path.moveTo(SkIntToScalar(20), SkIntToScalar(50));
+            path.quadTo(SkIntToScalar(50), SkIntToScalar(50), SkIntToScalar(50), SkIntToScalar(20));
+            path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
+            path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
+            path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
+            canvas->drawPath(path, paint);
+            canvas->restore();
+        }
+        // Cubic path test.
+        if (1) {
+            SkPath path;
+            canvas->save();
+            canvas->translate(100, 200);
+            path.moveTo(SkIntToScalar(20), SkIntToScalar(50));
+//            path.cubicTo(SkIntToScalar(20), SkIntToScalar(20),
+//                         SkIntToScalar(70), SkIntToScalar(70),
+//                         SkIntToScalar(50), SkIntToScalar(20));
+            path.cubicTo(SkIntToScalar(60), SkIntToScalar(40),
+                         SkIntToScalar(-20), SkIntToScalar(30),
+                         SkIntToScalar(50), SkIntToScalar(20));
+            path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
+            path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
+            path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
+            canvas->drawPath(path, paint);
+            canvas->restore();
+        }
     }
 
     virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y,