OffscreenBufferPool.cpp revision 07ae505d4045e2b1ae501e87560984dae06f9dd8
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 "Properties.h" 21#include "renderstate/RenderState.h" 22#include "utils/FatVector.h" 23#include "utils/TraceUtils.h" 24 25#include <utils/Color.h> 26#include <utils/Log.h> 27 28#include <GLES2/gl2.h> 29 30namespace android { 31namespace uirenderer { 32 33//////////////////////////////////////////////////////////////////////////////// 34// OffscreenBuffer 35//////////////////////////////////////////////////////////////////////////////// 36 37OffscreenBuffer::OffscreenBuffer(RenderState& renderState, Caches& caches, 38 uint32_t viewportWidth, uint32_t viewportHeight, bool wideColorGamut) 39 : GpuMemoryTracker(GpuObjectType::OffscreenBuffer) 40 , renderState(renderState) 41 , viewportWidth(viewportWidth) 42 , viewportHeight(viewportHeight) 43 , texture(caches) 44 , wideColorGamut(wideColorGamut) { 45 uint32_t width = computeIdealDimension(viewportWidth); 46 uint32_t height = computeIdealDimension(viewportHeight); 47 ATRACE_FORMAT("Allocate %ux%u HW Layer", width, height); 48 caches.textureState().activateTexture(0); 49 texture.resize(width, height, 50 wideColorGamut ? GL_RGBA16F : caches.rgbaInternalFormat(), GL_RGBA); 51 texture.blend = true; 52 texture.setWrap(GL_CLAMP_TO_EDGE); 53 // not setting filter on texture, since it's set when drawing, based on transform 54} 55 56Rect OffscreenBuffer::getTextureCoordinates() { 57 const float texX = 1.0f / static_cast<float>(texture.width()); 58 const float texY = 1.0f / static_cast<float>(texture.height()); 59 return Rect(0, viewportHeight * texY, viewportWidth * texX, 0); 60} 61 62void OffscreenBuffer::dirty(Rect dirtyArea) { 63 dirtyArea.doIntersect(0, 0, viewportWidth, viewportHeight); 64 if (!dirtyArea.isEmpty()) { 65 region.orSelf(android::Rect(dirtyArea.left, dirtyArea.top, 66 dirtyArea.right, dirtyArea.bottom)); 67 } 68} 69 70void OffscreenBuffer::updateMeshFromRegion() { 71 // avoid T-junctions as they cause artifacts in between the resultant 72 // geometry when complex transforms occur. 73 // TODO: generate the safeRegion only if necessary based on drawing transform 74 Region safeRegion = Region::createTJunctionFreeRegion(region); 75 76 size_t count; 77 const android::Rect* rects = safeRegion.getArray(&count); 78 79 const float texX = 1.0f / float(texture.width()); 80 const float texY = 1.0f / float(texture.height()); 81 82 FatVector<TextureVertex, 64> meshVector(count * 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(&vbo, 99 sizeof(TextureVertex) * count * 4, 100 &meshVector[0], 101 GL_DYNAMIC_DRAW); // TODO: GL_STATIC_DRAW if savelayer 102} 103 104uint32_t OffscreenBuffer::computeIdealDimension(uint32_t dimension) { 105 return uint32_t(ceilf(dimension / float(LAYER_SIZE)) * LAYER_SIZE); 106} 107 108OffscreenBuffer::~OffscreenBuffer() { 109 ATRACE_FORMAT("Destroy %ux%u HW Layer", texture.width(), texture.height()); 110 texture.deleteTexture(); 111 renderState.meshState().deleteMeshBuffer(vbo); 112 elementCount = 0; 113 vbo = 0; 114} 115 116/////////////////////////////////////////////////////////////////////////////// 117// OffscreenBufferPool 118/////////////////////////////////////////////////////////////////////////////// 119 120OffscreenBufferPool::OffscreenBufferPool() 121 : mMaxSize(Properties::layerPoolSize) { 122} 123 124OffscreenBufferPool::~OffscreenBufferPool() { 125 clear(); // TODO: unique_ptr? 126} 127 128int OffscreenBufferPool::Entry::compare(const Entry& lhs, const Entry& rhs) { 129 int deltaInt = int(lhs.width) - int(rhs.width); 130 if (deltaInt != 0) return deltaInt; 131 132 deltaInt = int(lhs.height) - int(rhs.height); 133 if (deltaInt != 0) return deltaInt; 134 135 return int(lhs.wideColorGamut) - int(rhs.wideColorGamut); 136} 137 138void OffscreenBufferPool::clear() { 139 for (auto& entry : mPool) { 140 delete entry.layer; 141 } 142 mPool.clear(); 143 mSize = 0; 144} 145 146OffscreenBuffer* OffscreenBufferPool::get(RenderState& renderState, 147 const uint32_t width, const uint32_t height, bool wideColorGamut) { 148 OffscreenBuffer* layer = nullptr; 149 150 Entry entry(width, height, wideColorGamut); 151 auto iter = mPool.find(entry); 152 153 if (iter != mPool.end()) { 154 entry = *iter; 155 mPool.erase(iter); 156 157 layer = entry.layer; 158 layer->viewportWidth = width; 159 layer->viewportHeight = height; 160 mSize -= layer->getSizeInBytes(); 161 } else { 162 layer = new OffscreenBuffer(renderState, Caches::getInstance(), 163 width, height, wideColorGamut); 164 } 165 166 return layer; 167} 168 169OffscreenBuffer* OffscreenBufferPool::resize(OffscreenBuffer* layer, 170 const uint32_t width, const uint32_t height) { 171 RenderState& renderState = layer->renderState; 172 if (layer->texture.width() == OffscreenBuffer::computeIdealDimension(width) 173 && layer->texture.height() == OffscreenBuffer::computeIdealDimension(height)) { 174 // resize in place 175 layer->viewportWidth = width; 176 layer->viewportHeight = height; 177 178 // entire area will be repainted (and may be smaller) so clear usage region 179 layer->region.clear(); 180 return layer; 181 } 182 putOrDelete(layer); 183 return get(renderState, width, height, layer->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