Refugee from Dead Machine 13: New version of the convex AA tessellator

gm/convex_all_line_paths.cpp

Index: gm/convex_all_line_paths.cpp
diff --git a/gm/convex_all_line_paths.cpp b/gm/convex_all_line_paths.cpp
index 0ffd65497cbf08ff910724f0917d0c09d50bd132..ba2d94b758c5c36277a0a0451ab21dff4f06ece3 100644
--- a/gm/convex_all_line_paths.cpp
+++ b/gm/convex_all_line_paths.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "gm.h"
+#include "GrAAConvexTessellator.h"
 
 static void create_ngon(int n, SkPoint* pts, SkScalar width, SkScalar height) {
     float angleStep = 360.0f / n, angle = 0.0f, sin, cos;
@@ -29,7 +30,7 @@ class ConvexLineOnlyPathsGM : public GM {
 public:
     ConvexLineOnlyPathsGM() { 
         fOffset.set(0, SkScalarHalf(kMaxPathHeight));
-        this->setBGColor(0xFFFFFFFF);
+        this->setBGColor(0xFF404040);
     }
 
 protected:
@@ -54,8 +55,8 @@ protected:
         };
         // trap - narrow on top - wide on bottom
         const SkPoint gPoints2[] = {
-            { -10.0f, -50.0f },
-            {  10.0f, -50.0f },
+            {  -2.0f, -50.0f },
+            {   2.0f, -50.0f },
             {  50.0f,  50.0f },
             { -50.0f,  50.0f }
         };
@@ -130,7 +131,7 @@ protected:
             { -65.45f, -29.39f },
             { -54.39f, -40.45f },
             { -40.45f, -47.55f },
-            { -25.0f,  -50.0f },
+            { -25.0f,  -50.0f  },
             {  -9.55f, -47.55f },
             {   4.39f, -40.45f },
             {  75.00f,   0.00f }
@@ -283,6 +284,27 @@ protected:
     }
 
     void onDraw(SkCanvas* canvas) override {
+#if 0
+        SkPath path = GetPath(8, 0, SkPath::kCCW_Direction);
+
+        SkMatrix m2;
+        m2.setScale(0.01f, 0.01f);
+//        m2.postTranslate(kGMWidth/2, kGMHeight/2);
+
+        path.transform(m2);
+
+        GrAAConvexTessellator result;
+        result.setTargetDepth(40.0f);
+
+        result.tessellate(SkMatrix::I(), path);
+
+        canvas->translate(kGMWidth/2, kGMHeight/2);
+        canvas->scale(400, 400);
+#if GR_AA_CONVEX_TESSELLATOR_VIZ
+        result.draw(canvas);
+#endif
+
+#else
         for (int i = 0; i < kNumPaths; ++i) {
             this->drawPath(canvas, i);
         }
@@ -301,13 +323,14 @@ protected:
             p1.lineTo(386.121399f, 689.940125f);
             canvas->drawPath(p1, p);
         }
+#endif
     }
 
 private:
     static const int kNumPaths      = 20;
     static const int kMaxPathHeight = 100;
-    static const int kGMWidth       = 512;
-    static const int kGMHeight      = 512;
+    static const int kGMWidth       = 1024;
+    static const int kGMHeight      = 1024;
 
     SkPoint fOffset;        // the right edge of the last drawn path