1/* 2 * Copyright (C) 2016 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 17#include "GLFunctorDrawable.h" 18#include "GlFunctorLifecycleListener.h" 19#include "RenderNode.h" 20#include "SkClipStack.h" 21#include <private/hwui/DrawGlInfo.h> 22#include <GrContext.h> 23 24namespace android { 25namespace uirenderer { 26namespace skiapipeline { 27 28GLFunctorDrawable::~GLFunctorDrawable() { 29 if(mListener.get() != nullptr) { 30 mListener->onGlFunctorReleased(mFunctor); 31 } 32} 33 34void GLFunctorDrawable::syncFunctor() const { 35 (*mFunctor)(DrawGlInfo::kModeSync, nullptr); 36} 37 38static void setScissor(int viewportHeight, const SkIRect& clip) { 39 SkASSERT(!clip.isEmpty()); 40 // transform to Y-flipped GL space, and prevent negatives 41 GLint y = viewportHeight - clip.fBottom; 42 GLint height = (viewportHeight - clip.fTop) - y; 43 glScissor(clip.fLeft, y, clip.width(), height); 44} 45 46void GLFunctorDrawable::onDraw(SkCanvas* canvas) { 47 if (canvas->getGrContext() == nullptr) { 48 SkDEBUGF(("Attempting to draw GLFunctor into an unsupported surface")); 49 return; 50 } 51 52 canvas->flush(); 53 54 if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaVulkan) { 55 canvas->clear(SK_ColorRED); 56 return; 57 } 58 59 SkImageInfo canvasInfo = canvas->imageInfo(); 60 SkMatrix44 mat4(canvas->getTotalMatrix()); 61 62 SkIRect ibounds = canvas->getDeviceClipBounds(); 63 64 DrawGlInfo info; 65 info.clipLeft = ibounds.fLeft; 66 info.clipTop = ibounds.fTop; 67 info.clipRight = ibounds.fRight; 68 info.clipBottom = ibounds.fBottom; 69 // info.isLayer = hasLayer(); 70 info.isLayer = false; 71 info.width = canvasInfo.width(); 72 info.height = canvasInfo.height(); 73 mat4.asColMajorf(&info.transform[0]); 74 75 //apply a simple clip with a scissor or a complex clip with a stencil 76 SkRegion clipRegion; 77 canvas->temporary_internal_getRgnClip(&clipRegion); 78 if (CC_UNLIKELY(clipRegion.isComplex())) { 79 //It is only a temporary solution to use a scissor to draw the stencil. 80 //There is a bug 31489986 to implement efficiently non-rectangular clips. 81 glDisable(GL_SCISSOR_TEST); 82 glDisable(GL_STENCIL_TEST); 83 glStencilMask(0xff); 84 glClearStencil(0); 85 glClear(GL_STENCIL_BUFFER_BIT); 86 glEnable(GL_SCISSOR_TEST); 87 SkRegion::Cliperator it(clipRegion, ibounds); 88 while (!it.done()) { 89 setScissor(info.height, it.rect()); 90 glClearStencil(0x1); 91 glClear(GL_STENCIL_BUFFER_BIT); 92 it.next(); 93 } 94 glDisable(GL_SCISSOR_TEST); 95 glStencilFunc(GL_EQUAL, 0x1, 0xff); 96 glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); 97 glEnable(GL_STENCIL_TEST); 98 } else if (clipRegion.isEmpty()) { 99 glDisable(GL_STENCIL_TEST); 100 glDisable(GL_SCISSOR_TEST); 101 } else { 102 glDisable(GL_STENCIL_TEST); 103 glEnable(GL_SCISSOR_TEST); 104 setScissor(info.height, clipRegion.getBounds()); 105 } 106 107 (*mFunctor)(DrawGlInfo::kModeDraw, &info); 108 109 canvas->getGrContext()->resetContext(); 110 } 111 112}; // namespace skiapipeline 113}; // namespace uirenderer 114}; // namespace android 115