Path stenciling in GrBatch

src/gpu/batches/GrStencilPathBatch.h

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrStencilPathBatch_DEFINED
+#define GrStencilPathBatch_DEFINED
+
+#include "GrBatch.h"
+#include "GrBatchFlushState.h"
+#include "GrGpu.h"
+#include "GrPath.h"
+#include "GrPathRendering.h"
+#include "GrRenderTarget.h"
+
+class GrStencilPathBatch final : public GrBatch {
+public:
+    static GrBatch* Create(const SkMatrix& viewMatrix,
+                           bool useHWAA,
+                           const GrStencilSettings& stencil,
+                           const GrScissorState& scissor,
+                           GrRenderTarget* renderTarget,
+                           const GrPath* path) {
+        return SkNEW_ARGS(GrStencilPathBatch, (viewMatrix, useHWAA, stencil, scissor, renderTarget,
+                                               path));
+    }
+
+    const char* name() const override { return "StencilPath"; }
+
+    uint32_t renderTargetUniqueID() const { return fRenderTarget.get()->getUniqueID(); }
+
+    SkString dumpInfo() const override {
+        SkString string;
+        string.printf("PATH: 0x%p, AA:%d", fPath.get(), fUseHWAA);
+        return string;
+    }
+
+private:
+    GrStencilPathBatch(const SkMatrix& viewMatrix,
+                       bool useHWAA,
+                       const GrStencilSettings& stencil,
+                       const GrScissorState& scissor,
+                       GrRenderTarget* renderTarget,
+                       const GrPath* path)
+    : fViewMatrix(viewMatrix)
+    , fUseHWAA(useHWAA)
+    , fStencil(stencil)
+    , fScissor(scissor)
+    , fRenderTarget(renderTarget)
+    , fPath(path) {}
+
+    bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { return false; }
+
+    void onPrepare(GrBatchFlushState*) override {}
+
+    void onDraw(GrBatchFlushState* state) override {
+        GrPathRendering::StencilPathArgs args(fUseHWAA, fRenderTarget.get(), &fViewMatrix,
+                                              &fScissor, &fStencil);
+        state->gpu()->pathRendering()->stencilPath(args, fPath.get());
+    }
+
+    SkMatrix                                                fViewMatrix;
+    bool                                                    fUseHWAA;
+    GrStencilSettings                                       fStencil;
+    GrScissorState                                          fScissor;
+    GrPendingIOResource<GrRenderTarget, kWrite_GrIOType>    fRenderTarget;
+    GrPendingIOResource<const GrPath, kRead_GrIOType>       fPath;
+};
+
+#endif