Rename GrAccelData to SkLayerInfo and move it to src/core

Review URL: https://codereview.chromium.org/719133002

1 files changed, 77 insertions, 0 deletions

diff --git a/src/core/SkLayerInfo.h b/src/core/SkLayerInfo.h
new file mode 100644
index 0000000000..dd0eaf032a
--- /dev/null
+++ b/src/core/SkLayerInfo.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkLayerInfo_DEFINED
+#define SkLayerInfo_DEFINED
+
+#include "SkPicture.h"
+#include "SkTArray.h"
+
+// This class stores information about the saveLayer/restore pairs found
+// within an SkPicture. It is used by Ganesh to perform layer hoisting.
+class SkLayerInfo : public SkPicture::AccelData {
+public:
+    // Information about a given saveLayer/restore block in an SkPicture
+    class BlockInfo {
+    public:
+        BlockInfo() : fPicture(NULL), fPaint(NULL) {}
+        ~BlockInfo() { SkSafeUnref(fPicture); SkDELETE(fPaint); }
+
+        // The picture owning the layer. If the owning picture is the top-most
+        // one (i.e., the picture for which this SkLayerInfo was created) then
+        // this pointer is NULL. If it is a nested picture then the pointer
+        // is non-NULL and owns a ref on the picture.
+        const SkPicture* fPicture;
+        // The device space bounds of this layer.
+        SkRect fBounds;
+        // The pre-matrix begins as the identity and accumulates the transforms
+        // of the containing SkPictures (if any). This matrix state has to be
+        // part of the initial matrix during replay so that it will be 
+        // preserved across setMatrix calls.
+        SkMatrix fPreMat;
+        // The matrix state (in the leaf picture) in which this layer's draws 
+        // must occur. It will/can be overridden by setMatrix calls in the
+        // layer itself. It does not include the translation needed to map the 
+        // layer's top-left point to the origin (which must be part of the
+        // initial matrix).
+        SkMatrix fLocalMat;
+        // The paint to use on restore. Can be NULL since it is optional.
+        const SkPaint* fPaint;
+        // The index of this saveLayer in the picture.
+        size_t  fSaveLayerOpID;
+        // The index of the matching restore in the picture.
+        size_t  fRestoreOpID;
+        // True if this saveLayer has at least one other saveLayer nested within it.
+        // False otherwise.
+        bool    fHasNestedLayers;
+        // True if this saveLayer is nested within another. False otherwise.
+        bool    fIsNested;
+    };
+
+    SkLayerInfo(Key key) : INHERITED(key) { }
+
+    BlockInfo& addBlock() { return fBlocks.push_back(); }
+
+    int numBlocks() const { return fBlocks.count(); }
+
+    const BlockInfo& block(int index) const {
+        SkASSERT(index < fBlocks.count());
+
+        return fBlocks[index];
+    }
+
+    // We may, in the future, need to pass in the GPUDevice in order to
+    // incorporate the clip and matrix state into the key
+    static SkPicture::AccelData::Key ComputeKey();
+
+private:
+    SkTArray<BlockInfo, true> fBlocks;
+
+    typedef SkPicture::AccelData INHERITED;
+};
+
+#endif // SkLayerInfo_DEFINED