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 TransformCanvas : public SkPaintFilterCanvas { 23 public: TransformCanvas(SkCanvas * target,SkBlendMode blendmode)24 TransformCanvas(SkCanvas* target, SkBlendMode blendmode) : 25 SkPaintFilterCanvas(target), mWrappedCanvas(target), mHolePunchBlendMode(blendmode) {} 26 27 protected: 28 bool onFilter(SkPaint& paint) const override; 29 30 protected: 31 void onDrawAnnotation(const SkRect& rect, const char* key, SkData* value) override; 32 void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override; 33 34 private: 35 // We don't own the canvas so just maintain a raw pointer to it 36 SkCanvas* mWrappedCanvas; 37 const SkBlendMode mHolePunchBlendMode; 38 }; 39