2 * Copyright 2018 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef SkCanvasVirtualEnforcer_DEFINED
9 #define SkCanvasVirtualEnforcer_DEFINED
11 #include "include/core/SkCanvas.h"
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 {
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;
34 void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
35 const SkPaint& paint) override = 0;
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;
43 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
44 // This is under active development for Chrome and not used in Android. Hold off on adding
45 // implementations in Android's SkCanvas subclasses until this stabilizes.
46 void onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4],
47 SkCanvas::QuadAAFlags aaFlags, const SkColor4f& color, SkBlendMode mode) override {}
49 void onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4],
50 SkCanvas::QuadAAFlags aaFlags, const SkColor4f& color, SkBlendMode mode) override = 0;
53 void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override = 0;
54 void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override = 0;
56 void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override = 0;
57 void onDrawPicture(const SkPicture* picture, const SkMatrix* matrix,
58 const SkPaint* paint) override = 0;