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 <SkCanvas.h>
21#include <cutils/compiler.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    explicit SkiaCanvasProxy(Canvas* canvas, bool filterHwuiCalls = false);
43    virtual ~SkiaCanvasProxy() {}
44
45protected:
46    virtual sk_sp<SkSurface> onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override;
47
48    virtual void willSave() override;
49    virtual SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
50    virtual void willRestore() override;
51
52    virtual void didConcat(const SkMatrix&) override;
53    virtual void didSetMatrix(const SkMatrix&) override;
54
55    virtual void onDrawPaint(const SkPaint& paint) override;
56    virtual void onDrawPoints(PointMode, size_t count, const SkPoint pts[],
57                              const SkPaint&) override;
58    virtual void onDrawOval(const SkRect&, const SkPaint&) override;
59    virtual void onDrawRect(const SkRect&, const SkPaint&) override;
60    virtual void onDrawRRect(const SkRRect&, const SkPaint&) override;
61    virtual void onDrawPath(const SkPath& path, const SkPaint&) override;
62    virtual void onDrawArc(const SkRect&, SkScalar startAngle, SkScalar sweepAngle, bool useCenter,
63                           const SkPaint&) override;
64    virtual void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top,
65                              const SkPaint*) override;
66    virtual void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst,
67                                  const SkPaint* paint, SrcRectConstraint) override;
68    virtual void onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, const SkRect& dst,
69                                  const SkPaint*) override;
70    virtual void onDrawImage(const SkImage*, SkScalar dx, SkScalar dy, const SkPaint*);
71    virtual void onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*,
72                                 SrcRectConstraint);
73    virtual void onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
74                                 const SkPaint*);
75    virtual void onDrawImageLattice(const SkImage*, const Lattice& lattice, const SkRect& dst,
76                                    const SkPaint*);
77    virtual void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override;
78
79    virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
80
81    virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
82                            const SkPaint&) override;
83    virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
84                               const SkPaint&) override;
85    virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
86                                SkScalar constY, const SkPaint&) override;
87    virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
88                                  const SkMatrix* matrix, const SkPaint&) override;
89    virtual void onDrawTextRSXform(const void* text, size_t byteLength, const SkRSXform[],
90                                   const SkRect* cullRect, const SkPaint& paint);
91    virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
92                                const SkPaint& paint) override;
93
94    virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
95                             const SkPoint texCoords[4], SkBlendMode,
96                             const SkPaint& paint) override;
97
98    virtual void onClipRect(const SkRect&, SkClipOp, ClipEdgeStyle) override;
99    virtual void onClipRRect(const SkRRect&, SkClipOp, ClipEdgeStyle) override;
100    virtual void onClipPath(const SkPath&, SkClipOp, ClipEdgeStyle) override;
101
102private:
103    Canvas* mCanvas;
104    bool mFilterHwuiCalls;
105
106    typedef SkCanvas INHERITED;
107};
108
109};  // namespace uirenderer
110};  // namespace android
111
112#endif  // SkiaCanvasProxy_DEFINED
113