Implement caching of stroked paths in the tessellating path renderer.

src/gpu/GrTestUtils.cpp

Index: src/gpu/GrTestUtils.cpp
diff --git a/src/gpu/GrTestUtils.cpp b/src/gpu/GrTestUtils.cpp
index b690d7e3cd4bc8f0e33b1dd31b27f0d8ed641196..714b99f65cf3ffd1ea9b9085867d121bf3417a8e 100644
--- a/src/gpu/GrTestUtils.cpp
+++ b/src/gpu/GrTestUtils.cpp
@@ -5,8 +5,10 @@
  * found in the LICENSE file.
  */
 
+#include "GrStrokeInfo.h"
 #include "GrTestUtils.h"
 #include "SkMatrix.h"
+#include "SkPathEffect.h"
 #include "SkPath.h"
 #include "SkRRect.h"
 
@@ -216,21 +218,44 @@ const SkPath& TestPathConvex(SkRandom* random) {
     return gPath[random->nextULessThan(static_cast<uint32_t>(SK_ARRAY_COUNT(gPath)))];
 }
 
-SkStrokeRec TestStrokeRec(SkRandom* random) {
-    SkStrokeRec::InitStyle style =
-            SkStrokeRec::InitStyle(random->nextULessThan(SkStrokeRec::kFill_InitStyle + 1));
-    SkStrokeRec rec(style);
+static void randomize_stroke_rec(SkStrokeRec* rec, SkRandom* random) {
     bool strokeAndFill = random->nextBool();
     SkScalar strokeWidth = random->nextBool() ? 0.f : 1.f;
-    rec.setStrokeStyle(strokeWidth, strokeAndFill);
+    rec->setStrokeStyle(strokeWidth, strokeAndFill);
 
     SkPaint::Cap cap = SkPaint::Cap(random->nextULessThan(SkPaint::kCapCount));
     SkPaint::Join join = SkPaint::Join(random->nextULessThan(SkPaint::kJoinCount));
     SkScalar miterLimit = random->nextRangeScalar(1.f, 5.f);
-    rec.setStrokeParams(cap, join, miterLimit);
+    rec->setStrokeParams(cap, join, miterLimit);
+}
+
+SkStrokeRec TestStrokeRec(SkRandom* random) {
+    SkStrokeRec::InitStyle style =
+            SkStrokeRec::InitStyle(random->nextULessThan(SkStrokeRec::kFill_InitStyle + 1));
+    SkStrokeRec rec(style);
+    randomize_stroke_rec(&rec, random);
     return rec;
 }
 
+GrStrokeInfo TestStrokeInfo(SkRandom* random) {
+    SkStrokeRec::InitStyle style =
+            SkStrokeRec::InitStyle(random->nextULessThan(SkStrokeRec::kFill_InitStyle + 1));
+    GrStrokeInfo strokeInfo(style);
+    randomize_stroke_rec(&strokeInfo, random);
+    SkPathEffect::DashInfo dashInfo;
+    dashInfo.fCount = random->nextRangeU(1, 50) * 2;
+    dashInfo.fIntervals = SkNEW_ARRAY(SkScalar, dashInfo.fCount);

[mtklein_C, 2015/08/06 18:42:03]

This you?

https://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-Golo-GPU-GT...

[Stephen White, 2015/08/06 19:22:38]

https://codereview.chromium.org/1274963003/

+    SkScalar sum = 0;
+    for (int i = 0; i < dashInfo.fCount; i++) {
+        dashInfo.fIntervals[i] = random->nextRangeScalar(SkDoubleToScalar(0.01),
+                                                         SkDoubleToScalar(10.0));
+        sum += dashInfo.fIntervals[i];
+    }
+    dashInfo.fPhase = random->nextRangeScalar(0, sum);
+    strokeInfo.setDashInfo(dashInfo);
+    return strokeInfo;
+}
+
 };
 
 #endif