Implement caching in the tessellating path renderer, including strokes.

src/gpu/GrTessellatingPathRenderer.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTessellatingPathRenderer.h"
 
 #include "GrBatch.h"
@@ skipping 1376 matching lines @@
     // This path renderer can draw all fill styles, but does not do antialiasing. It can do convex
     // and concave paths, but we'll leave the convex ones to simpler algorithms.
     return args.fStroke->isFillStyle() && !args.fAntiAlias && !args.fPath->isConvex();
 }
 
 class TessellatingPathBatch : public GrBatch {
 public:
 
     static GrBatch* Create(const GrColor& color,
                            const SkPath& path,
+                           const GrStrokeInfo* stroke,
                            const SkMatrix& viewMatrix,
-                           SkRect clipBounds) {
-        return SkNEW_ARGS(TessellatingPathBatch, (color, path, viewMatrix, clipBounds));
+                           SkRect clipBounds,
+                           const SkPath* origSrcPath,
+                           const GrStrokeInfo* origStrokeInfo) {
+        return SkNEW_ARGS(TessellatingPathBatch, (color, path, stroke, viewMatrix, clipBounds, origSrcPath, origStrokeInfo));
     }
 
     const char* name() const override { return "TessellatingPathBatch"; }
 
     void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
         out->setKnownFourComponents(fColor);
     }
 
     void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
         out->setUnknownSingleComponent();
@@ skipping 68 matching lines @@
             return 0;
         }
         SkPoint* verts = static_cast<SkPoint*>(vertexBuffer->map());
         LOG("emitting %d verts\n", count);
         SkPoint* end = polys_to_triangles(polys, fillType, verts);
         vertexBuffer->unmap();
         int actualCount = static_cast<int>(end - verts);
         LOG("actual count: %d\n", actualCount);
         SkASSERT(actualCount <= count);
 
-        if (!fPath.isVolatile()) {
-            TessInfo info;
-            info.fTolerance = isLinear ? 0 : tol;
-            info.fCount = actualCount;
-            SkAutoTUnref<SkData> data(SkData::NewWithCopy(&info, sizeof(info)));
-            key->setCustomData(data.get());
-            resourceProvider->assignUniqueKeyToResource(*key, vertexBuffer.get());
-            SkPathPriv::AddGenIDChangeListener(fPath, SkNEW(PathInvalidator(*key)));
-        }
+        TessInfo info;
+        info.fTolerance = isLinear ? 0 : tol;
+        info.fCount = actualCount;
+        SkAutoTUnref<SkData> data(SkData::NewWithCopy(&info, sizeof(info)));
+        key->setCustomData(data.get());
+        resourceProvider->assignUniqueKeyToResource(*key, vertexBuffer.get());
+        SkPathPriv::AddGenIDChangeListener(fPathForKey, SkNEW(PathInvalidator(*key)));
         return actualCount;
     }
 
     void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override {
         // construct a cache key from the path's genID and the view matrix
         static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain();
         GrUniqueKey key;
         int clipBoundsSize32 =
             fPath.isInverseFillType() ? sizeof(fClipBounds) / sizeof(uint32_t) : 0;
-        GrUniqueKey::Builder builder(&key, kDomain, 2 + clipBoundsSize32);
-        builder[0] = fPath.getGenerationID();
-        builder[1] = fPath.getFillType();
+        int strokeDataSize32 = fOrigStroke.computeUniqueKeyFragmentData32Cnt();
+        GrUniqueKey::Builder builder(&key, kDomain, 2 + clipBoundsSize32 + strokeDataSize32);
+        builder[0] = fPathForKey.getGenerationID();
+        builder[1] = fPathForKey.getFillType();
         // For inverse fills, the tessellation is dependent on clip bounds.
         if (fPath.isInverseFillType()) {
             memcpy(&builder[2], &fClipBounds, sizeof(fClipBounds));
         }
+        fOrigStroke.asUniqueKeyFragment(&builder[2 + clipBoundsSize32]);
         builder.finish();
         GrResourceProvider* rp = batchTarget->resourceProvider();
         SkAutoTUnref<GrVertexBuffer> vertexBuffer(rp->findAndRefTByUniqueKey<GrVertexBuffer>(key));
         int actualCount;
         SkScalar screenSpaceTol = GrPathUtils::kDefaultTolerance;
         SkScalar tol = GrPathUtils::scaleToleranceToSrc(
             screenSpaceTol, fViewMatrix, fPath.getBounds());
         if (!cache_match(vertexBuffer.get(), tol, &actualCount)) {
             actualCount = tessellate(&key, rp, vertexBuffer);
         }
@@ skipping 31 matching lines @@
         batchTarget->draw(vertices);
     }
 
     bool onCombineIfPossible(GrBatch*) override {
         return false;
     }
 
 private:
     TessellatingPathBatch(const GrColor& color,
                           const SkPath& path,
+                          const GrStrokeInfo* stroke,
                           const SkMatrix& viewMatrix,
-                          const SkRect& clipBounds)
+                          const SkRect& clipBounds,
+                          const SkPath* origSrcPath,
+                          const GrStrokeInfo* origStrokeInfo)
       : fColor(color)
       , fPath(path)
+      , fStroke(*stroke)
       , fViewMatrix(viewMatrix)
-      , fClipBounds(clipBounds) {
+      , fClipBounds(clipBounds)
+      , fPathForKey(origSrcPath ? *origSrcPath : fPath)
+      , fOrigStroke(origStrokeInfo ? *origStrokeInfo : *stroke) {
         this->initClassID<TessellatingPathBatch>();
 
         fBounds = path.getBounds();
         viewMatrix.mapRect(&fBounds);
     }
 
     GrColor        fColor;
     SkPath         fPath;
+    GrStrokeInfo   fStroke;
     SkMatrix       fViewMatrix;
     SkRect         fClipBounds; // in source space
     GrPipelineInfo fPipelineInfo;
+    SkPath         fPathForKey;
+    GrStrokeInfo   fOrigStroke;
 };
 
 bool GrTessellatingPathRenderer::onDrawPath(const DrawPathArgs& args) {
     SkASSERT(!args.fAntiAlias);
     const GrRenderTarget* rt = args.fPipelineBuilder->getRenderTarget();
     if (NULL == rt) {
         return false;
     }
 
     SkIRect clipBoundsI;
     args.fPipelineBuilder->clip().getConservativeBounds(rt, &clipBoundsI);
     SkRect clipBounds = SkRect::Make(clipBoundsI);
     SkMatrix vmi;
     if (!args.fViewMatrix->invert(&vmi)) {
         return false;
     }
     vmi.mapRect(&clipBounds);
     SkAutoTUnref<GrBatch> batch(TessellatingPathBatch::Create(args.fColor, *args.fPath,
-                                                              *args.fViewMatrix, clipBounds));
+                                                              args.fStroke, *args.fViewMatrix, clipBounds, args.fOrigSrcPath, args.fOrigStrokeInfo));
     args.fTarget->drawBatch(*args.fPipelineBuilder, batch);
 
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #ifdef GR_TEST_UTILS
 
 BATCH_TEST_DEFINE(TesselatingPathBatch) {
     GrColor color = GrRandomColor(random);
     SkMatrix viewMatrix = GrTest::TestMatrixInvertible(random);
     SkPath path = GrTest::TestPath(random);
+    GrStrokeInfo stroke(SkStrokeRec::kFill_InitStyle);
     SkRect clipBounds = GrTest::TestRect(random);
     SkMatrix vmi;
     bool result = viewMatrix.invert(&vmi);
     if (!result) {
         SkFAIL("Cannot invert matrix\n");
     }
     vmi.mapRect(&clipBounds);
-    return TessellatingPathBatch::Create(color, path, viewMatrix, clipBounds);
+    return TessellatingPathBatch::Create(color, path, &stroke, viewMatrix, clipBounds, nullptr, nullptr);
 }
 
 #endif