WIP: GPU-accelerated trapezoidal path renderer.

samplecode/SampleConcavePaths.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleCode.h"
 #include "SkView.h"
@@ skipping 117 matching lines @@
             path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
             path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
             path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
             path.moveTo(SkIntToScalar(30), SkIntToScalar(30));
             path.lineTo(SkIntToScalar(30), SkIntToScalar(70));
             path.lineTo(SkIntToScalar(70), SkIntToScalar(70));
             path.lineTo(SkIntToScalar(70), SkIntToScalar(30));
             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,
                                               unsigned modi) {
         this->inval(nullptr);
         return this->INHERITED::onFindClickHandler(x, y, modi);
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new ConcavePathView; }
 static SkViewRegister reg(MyFactory);