OffscreenBufferPool.cpp revision 1bcacfdcab0eaa0cee92bd7f5a1b5e271dd68e52
1/* 2 * Copyright (C) 2015 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 "OffscreenBufferPool.h" 18 19#include "Caches.h" 20#include "renderstate/RenderState.h" 21#include "utils/FatVector.h" 22#include "utils/TraceUtils.h" 23 24#include <utils/Color.h> 25#include <utils/Log.h> 26 27#include <GLES2/gl2.h> 28 29namespace android { 30namespace uirenderer { 31 32//////////////////////////////////////////////////////////////////////////////// 33// OffscreenBuffer 34//////////////////////////////////////////////////////////////////////////////// 35 36OffscreenBuffer::OffscreenBuffer(RenderState& renderState, Caches& caches, uint32_t viewportWidth, 37 uint32_t viewportHeight, bool wideColorGamut) 38 : GpuMemoryTracker(GpuObjectType::OffscreenBuffer) 39 , renderState(renderState) 40 , viewportWidth(viewportWidth) 41 , viewportHeight(viewportHeight) 42 , texture(caches) 43 , wideColorGamut(wideColorGamut) { 44 uint32_t width = computeIdealDimension(viewportWidth); 45 uint32_t height = computeIdealDimension(viewportHeight); 46 ATRACE_FORMAT("Allocate %ux%u HW Layer", width, height); 47 caches.textureState().activateTexture(0); 48 texture.resize(width, height, wideColorGamut ? GL_RGBA16F : caches.rgbaInternalFormat(), 49 GL_RGBA); 50 texture.blend = true; 51 texture.setWrap(GL_CLAMP_TO_EDGE); 52 // not setting filter on texture, since it's set when drawing, based on transform 53} 54 55Rect OffscreenBuffer::getTextureCoordinates() { 56 const float texX = 1.0f / static_cast<float>(texture.width()); 57 const float texY = 1.0f / static_cast<float>(texture.height()); 58 return Rect(0, viewportHeight * texY, viewportWidth * texX, 0); 59} 60 61void OffscreenBuffer::dirty(Rect dirtyArea) { 62 dirtyArea.doIntersect(0, 0, viewportWidth, viewportHeight); 63 if (!dirtyArea.isEmpty()) { 64 region.orSelf( 65 android::Rect(dirtyArea.left, dirtyArea.top, dirtyArea.right, dirtyArea.bottom)); 66 } 67} 68 69void OffscreenBuffer::updateMeshFromRegion() { 70 // avoid T-junctions as they cause artifacts in between the resultant 71 // geometry when complex transforms occur. 72 // TODO: generate the safeRegion only if necessary based on drawing transform 73 Region safeRegion = Region::createTJunctionFreeRegion(region); 74 75 size_t count; 76 const android::Rect* rects = safeRegion.getArray(&count); 77 78 const float texX = 1.0f / float(texture.width()); 79 const float texY = 1.0f / float(texture.height()); 80 81 FatVector<TextureVertex, 64> meshVector(count * 82 4); // uses heap if more than 64 vertices needed 83 TextureVertex* mesh = &meshVector[0]; 84 for (size_t i = 0; i < count; i++) { 85 const android::Rect* r = &rects[i]; 86 87 const float u1 = r->left * texX; 88 const float v1 = (viewportHeight - r->top) * texY; 89 const float u2 = r->right * texX; 90 const float v2 = (viewportHeight - r->bottom) * texY; 91 92 TextureVertex::set(mesh++, r->left, r->top, u1, v1); 93 TextureVertex::set(mesh++, r->right, r->top, u2, v1); 94 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 95 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 96 } 97 elementCount = count * 6; 98 renderState.meshState().genOrUpdateMeshBuffer( 99 &vbo, sizeof(TextureVertex) * count * 4, &meshVector[0], 100 GL_DYNAMIC_DRAW); // TODO: GL_STATIC_DRAW if savelayer 101} 102 103uint32_t OffscreenBuffer::computeIdealDimension(uint32_t dimension) { 104 return uint32_t(ceilf(dimension / float(LAYER_SIZE)) * LAYER_SIZE); 105} 106 107OffscreenBuffer::~OffscreenBuffer() { 108 ATRACE_FORMAT("Destroy %ux%u HW Layer", texture.width(), texture.height()); 109 texture.deleteTexture(); 110 renderState.meshState().deleteMeshBuffer(vbo); 111 elementCount = 0; 112 vbo = 0; 113} 114 115/////////////////////////////////////////////////////////////////////////////// 116// OffscreenBufferPool 117/////////////////////////////////////////////////////////////////////////////// 118 119OffscreenBufferPool::OffscreenBufferPool() 120 // 4 screen-sized RGBA_8888 textures 121 : mMaxSize(DeviceInfo::multiplyByResolution(4 * 4)) {} 122 123OffscreenBufferPool::~OffscreenBufferPool() { 124 clear(); // TODO: unique_ptr? 125} 126 127int OffscreenBufferPool::Entry::compare(const Entry& lhs, const Entry& rhs) { 128 int deltaInt = int(lhs.width) - int(rhs.width); 129 if (deltaInt != 0) return deltaInt; 130 131 deltaInt = int(lhs.height) - int(rhs.height); 132 if (deltaInt != 0) return deltaInt; 133 134 return int(lhs.wideColorGamut) - int(rhs.wideColorGamut); 135} 136 137void OffscreenBufferPool::clear() { 138 for (auto& entry : mPool) { 139 delete entry.layer; 140 } 141 mPool.clear(); 142 mSize = 0; 143} 144 145OffscreenBuffer* OffscreenBufferPool::get(RenderState& renderState, const uint32_t width, 146 const uint32_t height, bool wideColorGamut) { 147 OffscreenBuffer* layer = nullptr; 148 149 Entry entry(width, height, wideColorGamut); 150 auto iter = mPool.find(entry); 151 152 if (iter != mPool.end()) { 153 entry = *iter; 154 mPool.erase(iter); 155 156 layer = entry.layer; 157 layer->viewportWidth = width; 158 layer->viewportHeight = height; 159 mSize -= layer->getSizeInBytes(); 160 } else { 161 layer = new OffscreenBuffer(renderState, Caches::getInstance(), width, height, 162 wideColorGamut); 163 } 164 165 return layer; 166} 167 168OffscreenBuffer* OffscreenBufferPool::resize(OffscreenBuffer* layer, const uint32_t width, 169 const uint32_t height) { 170 RenderState& renderState = layer->renderState; 171 if (layer->texture.width() == OffscreenBuffer::computeIdealDimension(width) && 172 layer->texture.height() == OffscreenBuffer::computeIdealDimension(height)) { 173 // resize in place 174 layer->viewportWidth = width; 175 layer->viewportHeight = height; 176 177 // entire area will be repainted (and may be smaller) so clear usage region 178 layer->region.clear(); 179 return layer; 180 } 181 bool wideColorGamut = layer->wideColorGamut; 182 putOrDelete(layer); 183 return get(renderState, width, height, wideColorGamut); 184} 185 186void OffscreenBufferPool::dump() { 187 for (auto entry : mPool) { 188 ALOGD(" Layer size %dx%d", entry.width, entry.height); 189 } 190} 191 192void OffscreenBufferPool::putOrDelete(OffscreenBuffer* layer) { 193 const uint32_t size = layer->getSizeInBytes(); 194 // Don't even try to cache a layer that's bigger than the cache 195 if (size < mMaxSize) { 196 // TODO: Use an LRU 197 while (mSize + size > mMaxSize) { 198 OffscreenBuffer* victim = mPool.begin()->layer; 199 mSize -= victim->getSizeInBytes(); 200 delete victim; 201 mPool.erase(mPool.begin()); 202 } 203 204 // clear region, since it's no longer valid 205 layer->region.clear(); 206 207 Entry entry(layer); 208 209 mPool.insert(entry); 210 mSize += size; 211 } else { 212 delete layer; 213 } 214} 215 216}; // namespace uirenderer 217}; // namespace android 218