Implement caching of stroked paths in the tessellating path renderer.

This requires adding the stroke info to the cache key, and doing the
stroking and dashing before rendering as triangles.

BUG=skia:3755

Committed: https://skia.googlesource.com/skia/+/29e0d3f267a03546f236023347cdb4595ece2fd1

Review URL: https://codereview.chromium.org/1275553002

1 files changed, 31 insertions, 6 deletions

diff --git a/src/gpu/GrTestUtils.cpp b/src/gpu/GrTestUtils.cpp
index b690d7e3cd..714b99f65c 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);
+    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