1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SkiaCanvasProxy_DEFINED
18#define SkiaCanvasProxy_DEFINED
19
20#include <cutils/compiler.h>
21#include <SkCanvas.h>
22
23#include "hwui/Canvas.h"
24
25namespace android {
26namespace uirenderer {
27
28/**
29 * This class serves as a proxy between Skia's SkCanvas and Android Framework's
30 * Canvas.  The class does not maintain any draw-related state and will pass
31 * through most requests directly to the Canvas provided in the constructor.
32 *
33 * Upon construction it is expected that the provided Canvas has already been
34 * prepared for recording and will continue to be in the recording state while
35 * this proxy class is being used.
36 *
37 * If filterHwuiCalls is true, the proxy silently ignores away draw calls that
38 * aren't supported by HWUI.
39 */
40class ANDROID_API SkiaCanvasProxy : public SkCanvas {
41public:
42    SkiaCanvasProxy(Canvas* canvas, bool filterHwuiCalls = false);
43    virtual ~SkiaCanvasProxy() {}
44
45protected:
46
47    virtual SkSurface* onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override;
48
49    virtual void willSave() override;
50    virtual SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
51    virtual void willRestore() override;
52
53    virtual void didConcat(const SkMatrix&) override;
54    virtual void didSetMatrix(const SkMatrix&) override;
55
56    virtual void onDrawPaint(const SkPaint& paint) override;
57    virtual void onDrawPoints(PointMode, size_t count, const SkPoint pts[],
58                              const SkPaint&) override;
59    virtual void onDrawOval(const SkRect&, const SkPaint&) override;
60    virtual void onDrawRect(const SkRect&, const SkPaint&) override;
61    virtual void onDrawRRect(const SkRRect&, const SkPaint&) override;
62    virtual void onDrawPath(const SkPath& path, const SkPaint&) override;
63    virtual void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top,
64                              const SkPaint*) override;
65    virtual void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst,
66                                  const SkPaint* paint, SrcRectConstraint) override;
67    virtual void onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
68                                  const SkRect& dst, const SkPaint*) override;
69    virtual void onDrawVertices(VertexMode, int vertexCount, const SkPoint vertices[],
70                                const SkPoint texs[], const SkColor colors[], SkXfermode*,
71                                const uint16_t indices[], int indexCount,
72                                const SkPaint&) override;
73
74    virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
75
76    virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
77                            const SkPaint&) override;
78    virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
79                               const SkPaint&) override;
80    virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
81                                SkScalar constY, const SkPaint&) override;
82    virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
83                                  const SkMatrix* matrix, const SkPaint&) override;
84    virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
85                                const SkPaint& paint) override;
86
87    virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
88                             const SkPoint texCoords[4], SkXfermode* xmode,
89                             const SkPaint& paint) override;
90
91    virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) override;
92    virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) override;
93    virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) override;
94    virtual void onClipRegion(const SkRegion&, SkRegion::Op) override;
95
96private:
97    Canvas* mCanvas;
98    bool mFilterHwuiCalls;
99
100    typedef SkCanvas INHERITED;
101};
102
103}; // namespace uirenderer
104}; // namespace android
105
106#endif // SkiaCanvasProxy_DEFINED
107