1 files changed, 141 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/gpu/GrAppliedClip.h b/gfx/skia/skia/src/gpu/GrAppliedClip.h
new file mode 100644
index 0000000000..5e6e4cacce
--- /dev/null
+++ b/gfx/skia/skia/src/gpu/GrAppliedClip.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrAppliedClip_DEFINED
+#define GrAppliedClip_DEFINED
+
+#include "src/gpu/GrFragmentProcessor.h"
+#include "src/gpu/GrScissorState.h"
+#include "src/gpu/GrWindowRectsState.h"
+
+#include "src/core/SkClipStack.h"
+
+
+/**
+ * Produced by GrHardClip. It provides a set of modifications to the hardware drawing state that
+ * implement the clip.
+ */
+class GrAppliedHardClip {
+public:
+    GrAppliedHardClip() = default;
+    GrAppliedHardClip(GrAppliedHardClip&& that) = default;
+    GrAppliedHardClip(const GrAppliedHardClip&) = delete;
+
+    const GrScissorState& scissorState() const { return fScissorState; }
+    const GrWindowRectsState& windowRectsState() const { return fWindowRectsState; }
+    uint32_t stencilStackID() const { return fStencilStackID; }
+    bool hasStencilClip() const { return SkClipStack::kInvalidGenID != fStencilStackID; }
+
+    /**
+     * Intersects the applied clip with the provided rect. Returns false if the draw became empty.
+     * 'clippedDrawBounds' will be intersected with 'irect'. This returns false if the clip becomes
+     * empty or the draw no longer intersects the clip. In either case the draw can be skipped.
+     */
+    bool addScissor(const SkIRect& irect, SkRect* clippedDrawBounds) {
+        return fScissorState.intersect(irect) && clippedDrawBounds->intersect(SkRect::Make(irect));
+    }
+
+    void addWindowRectangles(const GrWindowRectsState& windowState) {
+        SkASSERT(!fWindowRectsState.enabled());
+        fWindowRectsState = windowState;
+    }
+
+    void addWindowRectangles(const GrWindowRectangles& windows, GrWindowRectsState::Mode mode) {
+        SkASSERT(!fWindowRectsState.enabled());
+        fWindowRectsState.set(windows, mode);
+    }
+
+    void addStencilClip(uint32_t stencilStackID) {
+        SkASSERT(SkClipStack::kInvalidGenID == fStencilStackID);
+        fStencilStackID = stencilStackID;
+    }
+
+    bool doesClip() const {
+        return fScissorState.enabled() || this->hasStencilClip() || fWindowRectsState.enabled();
+    }
+
+    bool operator==(const GrAppliedHardClip& that) const {
+        return fScissorState == that.fScissorState &&
+               fWindowRectsState == that.fWindowRectsState &&
+               fStencilStackID == that.fStencilStackID;
+    }
+    bool operator!=(const GrAppliedHardClip& that) const { return !(*this == that); }
+
+private:
+    GrScissorState             fScissorState;
+    GrWindowRectsState         fWindowRectsState;
+    uint32_t                   fStencilStackID = SkClipStack::kInvalidGenID;
+};
+
+/**
+ * Produced by GrClip. It provides a set of modifications to GrPipeline that implement the clip.
+ */
+class GrAppliedClip {
+public:
+    GrAppliedClip() = default;
+    GrAppliedClip(GrAppliedClip&& that) = default;
+    GrAppliedClip(const GrAppliedClip&) = delete;
+
+    const GrScissorState& scissorState() const { return fHardClip.scissorState(); }
+    const GrWindowRectsState& windowRectsState() const { return fHardClip.windowRectsState(); }
+    uint32_t stencilStackID() const { return fHardClip.stencilStackID(); }
+    bool hasStencilClip() const { return fHardClip.hasStencilClip(); }
+    int numClipCoverageFragmentProcessors() const { return fClipCoverageFPs.count(); }
+    const GrFragmentProcessor* clipCoverageFragmentProcessor(int i) const {
+        SkASSERT(fClipCoverageFPs[i]);
+        return fClipCoverageFPs[i].get();
+    }
+    std::unique_ptr<const GrFragmentProcessor> detachClipCoverageFragmentProcessor(int i) {
+        SkASSERT(fClipCoverageFPs[i]);
+        return std::move(fClipCoverageFPs[i]);
+    }
+
+    GrAppliedHardClip& hardClip() { return fHardClip; }
+
+    void addCoverageFP(std::unique_ptr<GrFragmentProcessor> fp) {
+        SkASSERT(fp);
+        fClipCoverageFPs.push_back(std::move(fp));
+    }
+
+    bool doesClip() const {
+        return fHardClip.doesClip() || !fClipCoverageFPs.empty();
+    }
+
+    bool operator==(const GrAppliedClip& that) const {
+        if (fHardClip != that.fHardClip ||
+            fClipCoverageFPs.count() != that.fClipCoverageFPs.count()) {
+            return false;
+        }
+        for (int i = 0; i < fClipCoverageFPs.count(); ++i) {
+            if (!fClipCoverageFPs[i] || !that.fClipCoverageFPs[i]) {
+                if (fClipCoverageFPs[i] == that.fClipCoverageFPs[i]) {
+                    continue; // Both are null.
+                }
+                return false;
+            }
+            if (!fClipCoverageFPs[i]->isEqual(*that.fClipCoverageFPs[i])) {
+                return false;
+            }
+        }
+        return true;
+    }
+    bool operator!=(const GrAppliedClip& that) const { return !(*this == that); }
+
+    void visitProxies(const GrOp::VisitProxyFunc& func) const {
+        for (const std::unique_ptr<GrFragmentProcessor>& fp : fClipCoverageFPs) {
+            if (fp) { // This might be called after detach.
+                fp->visitProxies(func);
+            }
+        }
+    }
+
+private:
+    GrAppliedHardClip fHardClip;
+    SkSTArray<4, std::unique_ptr<GrFragmentProcessor>> fClipCoverageFPs;
+};
+
+#endif