skia WIPjarred/canvas

1 files changed, 80 insertions, 0 deletions

diff --git a/src/deps/skia/include/utils/SkNoDrawCanvas.h b/src/deps/skia/include/utils/SkNoDrawCanvas.h
new file mode 100644
index 000000000..3f2563873
--- /dev/null
+++ b/src/deps/skia/include/utils/SkNoDrawCanvas.h
@@ -0,0 +1,80 @@
+/*
+ * 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 SkNoDrawCanvas_DEFINED
+#define SkNoDrawCanvas_DEFINED
+
+#include "include/core/SkCanvas.h"
+#include "include/core/SkCanvasVirtualEnforcer.h"
+
+struct SkIRect;
+
+// SkNoDrawCanvas is a helper for SkCanvas subclasses which do not need to
+// actually rasterize (e.g., analysis of the draw calls).
+//
+// It provides the following simplifications:
+//
+//   * not backed by any device/pixels
+//   * conservative clipping (clipping calls only use rectangles)
+//
+class SK_API SkNoDrawCanvas : public SkCanvasVirtualEnforcer<SkCanvas> {
+public:
+    SkNoDrawCanvas(int width, int height);
+    SkNoDrawCanvas(const SkIRect&);
+
+    explicit SkNoDrawCanvas(sk_sp<SkBaseDevice> device);
+
+    // Optimization to reset state to be the same as after construction.
+    void resetCanvas(int w, int h)        { this->resetForNextPicture(SkIRect::MakeWH(w, h)); }
+    void resetCanvas(const SkIRect& rect) { this->resetForNextPicture(rect); }
+
+protected:
+    SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override;
+    bool onDoSaveBehind(const SkRect*) override;
+
+    // No-op overrides for aborting rasterization earlier than SkNullBlitter.
+    void onDrawAnnotation(const SkRect&, const char[], SkData*) override {}
+    void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override {}
+    void onDrawDrawable(SkDrawable*, const SkMatrix*) override {}
+    void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override {}
+    void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode,
+                     const SkPaint&) override {}
+
+    void onDrawPaint(const SkPaint&) override {}
+    void onDrawBehind(const SkPaint&) override {}
+    void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override {}
+    void onDrawRect(const SkRect&, const SkPaint&) override {}
+    void onDrawRegion(const SkRegion&, const SkPaint&) override {}
+    void onDrawOval(const SkRect&, const SkPaint&) override {}
+    void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override {}
+    void onDrawRRect(const SkRRect&, const SkPaint&) override {}
+    void onDrawPath(const SkPath&, const SkPaint&) override {}
+
+    void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&,
+                      const SkPaint*) override {}
+    void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&,
+                          const SkPaint*, SrcRectConstraint) override {}
+    void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode,
+                             const SkPaint*) override {}
+    void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int,
+                  SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override {}
+
+    void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override {}
+    void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override {}
+    void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override {}
+
+    void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&,
+                          SkBlendMode) override {}
+    void onDrawEdgeAAImageSet2(const ImageSetEntry[], int, const SkPoint[], const SkMatrix[],
+                               const SkSamplingOptions&, const SkPaint*,
+                               SrcRectConstraint) override {}
+
+private:
+    using INHERITED = SkCanvasVirtualEnforcer<SkCanvas>;
+};
+
+#endif // SkNoDrawCanvas_DEFINED