1 /* 2 * Copyright (C) 2021 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 #pragma once 17 18 #include <include/core/SkCanvas.h> 19 #include "SkPaintFilterCanvas.h" 20 #include <effects/StretchEffect.h> 21 22 class SkData; 23 class SkDrawable; 24 class SkMatrix; 25 class SkPaint; 26 enum class SkBlendMode; 27 struct SkRect; 28 29 class TransformCanvas : public SkPaintFilterCanvas { 30 public: TransformCanvas(SkCanvas * target,SkBlendMode blendmode)31 TransformCanvas(SkCanvas* target, SkBlendMode blendmode) : 32 SkPaintFilterCanvas(target), mWrappedCanvas(target), mHolePunchBlendMode(blendmode) {} 33 34 protected: 35 bool onFilter(SkPaint& paint) const override; 36 37 protected: 38 void onDrawAnnotation(const SkRect& rect, const char* key, SkData* value) override; 39 void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override; 40 41 private: 42 // We don't own the canvas so just maintain a raw pointer to it 43 SkCanvas* mWrappedCanvas; 44 const SkBlendMode mHolePunchBlendMode; 45 }; 46