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 <SkSurface.h> 19 #include <effects/StretchEffect.h> 20 #include <include/gpu/ganesh/GrRecordingContext.h> 21 22 #include "SkiaDisplayList.h" 23 24 namespace android::uirenderer { 25 26 /** 27 * Helper class used to create/cache an SkSurface instance 28 * to create a mask that is used to draw a stretched hole punch 29 */ 30 class StretchMask { 31 public: 32 /** 33 * Release the current surface used for the stretch mask 34 */ clear()35 void clear() { 36 mMaskSurface = nullptr; 37 } 38 39 /** 40 * Reset the dirty flag to re-create the stretch mask on the next draw 41 * pass 42 */ markDirty()43 void markDirty() { 44 mIsDirty = true; 45 } 46 47 /** 48 * Draws the stretch mask into the given target canvas 49 * @param context GrRecordingContext used to create the surface if necessary 50 * @param stretch StretchEffect to apply to the mask 51 * @param bounds Target bounds to draw into the given canvas 52 * @param displayList List of drawing commands to render into the stretch mask 53 * @param canvas Target canvas to draw the mask into 54 */ 55 void draw(GrRecordingContext* context, 56 const StretchEffect& stretch, const SkRect& bounds, 57 skiapipeline::SkiaDisplayList* displayList, SkCanvas* canvas); 58 private: 59 sk_sp<SkSurface> mMaskSurface; 60 bool mIsDirty = true; 61 }; 62 63 } 64