1 | /* |
2 | * Copyright 2018 Google Inc. |
3 | * |
4 | * Use of this source code is governed by a BSD-style license that can be |
5 | * found in the LICENSE file. |
6 | */ |
7 | |
8 | #ifndef SkCanvasVirtualEnforcer_DEFINED |
9 | #define SkCanvasVirtualEnforcer_DEFINED |
10 | |
11 | #include "include/core/SkCanvas.h" |
12 | |
13 | // If you would ordinarily want to inherit from Base (eg SkCanvas, SkNWayCanvas), instead |
14 | // inherit from SkCanvasVirtualEnforcer<Base>, which will make the build fail if you forget |
15 | // to override one of SkCanvas' key virtual hooks. |
16 | template <typename Base> |
17 | class SkCanvasVirtualEnforcer : public Base { |
18 | public: |
19 | using Base::Base; |
20 | |
21 | protected: |
22 | void onDrawPaint(const SkPaint& paint) override = 0; |
23 | void onDrawBehind(const SkPaint&) override {} // make zero after android updates |
24 | void onDrawRect(const SkRect& rect, const SkPaint& paint) override = 0; |
25 | void onDrawRRect(const SkRRect& rrect, const SkPaint& paint) override = 0; |
26 | void onDrawDRRect(const SkRRect& outer, const SkRRect& inner, |
27 | const SkPaint& paint) override = 0; |
28 | void onDrawOval(const SkRect& rect, const SkPaint& paint) override = 0; |
29 | void onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle, bool useCenter, |
30 | const SkPaint& paint) override = 0; |
31 | void onDrawPath(const SkPath& path, const SkPaint& paint) override = 0; |
32 | void onDrawRegion(const SkRegion& region, const SkPaint& paint) override = 0; |
33 | |
34 | void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, |
35 | const SkPaint& paint) override = 0; |
36 | |
37 | void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], |
38 | const SkPoint texCoords[4], SkBlendMode mode, |
39 | const SkPaint& paint) override = 0; |
40 | void onDrawPoints(SkCanvas::PointMode mode, size_t count, const SkPoint pts[], |
41 | const SkPaint& paint) override = 0; |
42 | |
43 | // restore me later when clients are updated |
44 | // void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override = 0; |
45 | |
46 | void onDrawImage(const SkImage* image, SkScalar dx, SkScalar dy, |
47 | const SkPaint* paint) override = 0; |
48 | void onDrawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst, |
49 | const SkPaint* paint, SkCanvas::SrcRectConstraint constraint) override = 0; |
50 | void onDrawImageNine(const SkImage* image, const SkIRect& center, const SkRect& dst, |
51 | const SkPaint* paint) override = 0; |
52 | void onDrawImageLattice(const SkImage* image, const SkCanvas::Lattice& lattice, |
53 | const SkRect& dst, const SkPaint* paint) override = 0; |
54 | |
55 | #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
56 | // This is under active development for Chrome and not used in Android. Hold off on adding |
57 | // implementations in Android's SkCanvas subclasses until this stabilizes. |
58 | void onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], |
59 | SkCanvas::QuadAAFlags aaFlags, const SkColor4f& color, SkBlendMode mode) override {} |
60 | void onDrawEdgeAAImageSet(const SkCanvas::ImageSetEntry imageSet[], int count, |
61 | const SkPoint dstClips[], const SkMatrix preViewMatrices[], const SkPaint* paint, |
62 | SkCanvas::SrcRectConstraint constraint) override {} |
63 | #else |
64 | void onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], |
65 | SkCanvas::QuadAAFlags aaFlags, const SkColor4f& color, SkBlendMode mode) override = 0; |
66 | void onDrawEdgeAAImageSet(const SkCanvas::ImageSetEntry imageSet[], int count, |
67 | const SkPoint dstClips[], const SkMatrix preViewMatrices[], const SkPaint* paint, |
68 | SkCanvas::SrcRectConstraint constraint) override = 0; |
69 | #endif |
70 | |
71 | void onDrawAtlas(const SkImage* atlas, const SkRSXform xform[], const SkRect rect[], |
72 | const SkColor colors[], int count, SkBlendMode mode, const SkRect* cull, |
73 | const SkPaint* paint) override = 0; |
74 | |
75 | void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override = 0; |
76 | void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override = 0; |
77 | |
78 | void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override = 0; |
79 | void onDrawPicture(const SkPicture* picture, const SkMatrix* matrix, |
80 | const SkPaint* paint) override = 0; |
81 | }; |
82 | |
83 | #endif |
84 | |