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| 1 // Copyright 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "config.h" | |
| 6 | |
| 7 #include "cc/texture_update_controller.h" | |
| 8 | |
| 9 #include "base/debug/trace_event.h" | |
| 10 #include "cc/prioritized_texture.h" | |
| 11 #include "cc/proxy.h" | |
| 12 #include "cc/resource_provider.h" | |
| 13 #include "cc/texture_copier.h" | |
| 14 #include "third_party/khronos/GLES2/gl2.h" | |
| 15 #include "third_party/skia/include/gpu/SkGpuDevice.h" | |
| 16 #include <limits> | |
| 17 #include <public/WebGraphicsContext3D.h> | |
| 18 #include <public/WebSharedGraphicsContext3D.h> | |
| 19 #include <wtf/CurrentTime.h> | |
| 20 | |
| 21 using WebKit::WebGraphicsContext3D; | |
| 22 using WebKit::WebSharedGraphicsContext3D; | |
| 23 | |
| 24 namespace { | |
| 25 | |
| 26 // Number of partial updates we allow. | |
| 27 const size_t partialTextureUpdatesMax = 12; | |
| 28 | |
| 29 // Measured in seconds. | |
| 30 const double textureUpdateTickRate = 0.004; | |
| 31 | |
| 32 // Measured in seconds. | |
| 33 const double uploaderBusyTickRate = 0.001; | |
| 34 | |
| 35 // Flush interval when performing texture uploads. | |
| 36 const int textureUploadFlushPeriod = 4; | |
| 37 | |
| 38 // Number of blocking update intervals to allow. | |
| 39 const size_t maxBlockingUpdateIntervals = 4; | |
| 40 | |
| 41 scoped_ptr<SkCanvas> createAcceleratedCanvas( | |
| 42 GrContext* grContext, cc::IntSize canvasSize, unsigned textureId) | |
| 43 { | |
| 44 GrPlatformTextureDesc textureDesc; | |
| 45 textureDesc.fFlags = kRenderTarget_GrPlatformTextureFlag; | |
| 46 textureDesc.fWidth = canvasSize.width(); | |
| 47 textureDesc.fHeight = canvasSize.height(); | |
| 48 textureDesc.fConfig = kSkia8888_GrPixelConfig; | |
| 49 textureDesc.fTextureHandle = textureId; | |
| 50 SkAutoTUnref<GrTexture> target( | |
| 51 grContext->createPlatformTexture(textureDesc)); | |
| 52 SkAutoTUnref<SkDevice> device(new SkGpuDevice(grContext, target.get())); | |
| 53 return make_scoped_ptr(new SkCanvas(device.get())); | |
| 54 } | |
| 55 | |
| 56 } // namespace | |
| 57 | |
| 58 namespace cc { | |
| 59 | |
| 60 size_t TextureUpdateController::maxPartialTextureUpdates() | |
| 61 { | |
| 62 return partialTextureUpdatesMax; | |
| 63 } | |
| 64 | |
| 65 size_t TextureUpdateController::maxFullUpdatesPerTick( | |
| 66 ResourceProvider* resourceProvider) | |
| 67 { | |
| 68 double texturesPerSecond = resourceProvider->estimatedUploadsPerSecond(); | |
| 69 size_t texturesPerTick = floor(textureUpdateTickRate * texturesPerSecond); | |
| 70 return texturesPerTick ? texturesPerTick : 1; | |
| 71 } | |
| 72 | |
| 73 TextureUpdateController::TextureUpdateController(TextureUpdateControllerClient*
client, Thread* thread, scoped_ptr<TextureUpdateQueue> queue, ResourceProvider*
resourceProvider) | |
| 74 : m_client(client) | |
| 75 , m_timer(new Timer(thread, this)) | |
| 76 , m_queue(queue.Pass()) | |
| 77 , m_resourceProvider(resourceProvider) | |
| 78 , m_textureUpdatesPerTick(maxFullUpdatesPerTick(resourceProvider)) | |
| 79 , m_firstUpdateAttempt(true) | |
| 80 { | |
| 81 } | |
| 82 | |
| 83 TextureUpdateController::~TextureUpdateController() | |
| 84 { | |
| 85 } | |
| 86 | |
| 87 void TextureUpdateController::performMoreUpdates( | |
| 88 base::TimeTicks timeLimit) | |
| 89 { | |
| 90 m_timeLimit = timeLimit; | |
| 91 | |
| 92 // Update already in progress. | |
| 93 if (m_timer->isActive()) | |
| 94 return; | |
| 95 | |
| 96 // Call updateMoreTexturesNow() directly unless it's the first update | |
| 97 // attempt. This ensures that we empty the update queue in a finite | |
| 98 // amount of time. | |
| 99 if (m_firstUpdateAttempt) { | |
| 100 // Post a 0-delay task when no updates were left. When it runs, | |
| 101 // readyToFinalizeTextureUpdates() will be called. | |
| 102 if (!updateMoreTexturesIfEnoughTimeRemaining()) | |
| 103 m_timer->startOneShot(0); | |
| 104 | |
| 105 m_firstUpdateAttempt = false; | |
| 106 } else | |
| 107 updateMoreTexturesNow(); | |
| 108 } | |
| 109 | |
| 110 void TextureUpdateController::discardUploadsToEvictedResources() | |
| 111 { | |
| 112 m_queue->clearUploadsToEvictedResources(); | |
| 113 } | |
| 114 | |
| 115 void TextureUpdateController::updateTexture(ResourceUpdate update) | |
| 116 { | |
| 117 if (update.picture) { | |
| 118 PrioritizedTexture* texture = update.texture; | |
| 119 IntRect pictureRect = update.content_rect; | |
| 120 IntRect sourceRect = update.source_rect; | |
| 121 IntSize destOffset = update.dest_offset; | |
| 122 | |
| 123 texture->acquireBackingTexture(m_resourceProvider); | |
| 124 DCHECK(texture->haveBackingTexture()); | |
| 125 | |
| 126 DCHECK(m_resourceProvider->resourceType(texture->resourceId()) == | |
| 127 ResourceProvider::GLTexture); | |
| 128 | |
| 129 WebGraphicsContext3D* paintContext = Proxy::hasImplThread() ? | |
| 130 WebSharedGraphicsContext3D::compositorThreadContext() : | |
| 131 WebSharedGraphicsContext3D::mainThreadContext(); | |
| 132 GrContext* paintGrContext = Proxy::hasImplThread() ? | |
| 133 WebSharedGraphicsContext3D::compositorThreadGrContext() : | |
| 134 WebSharedGraphicsContext3D::mainThreadGrContext(); | |
| 135 | |
| 136 // Flush the context in which the backing texture is created so that it | |
| 137 // is available in other shared contexts. It is important to do here | |
| 138 // because the backing texture is created in one context while it is | |
| 139 // being written to in another. | |
| 140 m_resourceProvider->flush(); | |
| 141 ResourceProvider::ScopedWriteLockGL lock( | |
| 142 m_resourceProvider, texture->resourceId()); | |
| 143 | |
| 144 // Make sure ganesh uses the correct GL context. | |
| 145 paintContext->makeContextCurrent(); | |
| 146 | |
| 147 // Create an accelerated canvas to draw on. | |
| 148 scoped_ptr<SkCanvas> canvas = createAcceleratedCanvas( | |
| 149 paintGrContext, texture->size(), lock.textureId()); | |
| 150 | |
| 151 // The compositor expects the textures to be upside-down so it can flip | |
| 152 // the final composited image. Ganesh renders the image upright so we | |
| 153 // need to do a y-flip. | |
| 154 canvas->translate(0.0, texture->size().height()); | |
| 155 canvas->scale(1.0, -1.0); | |
| 156 // Clip to the destination on the texture that must be updated. | |
| 157 canvas->clipRect(SkRect::MakeXYWH(destOffset.width(), | |
| 158 destOffset.height(), | |
| 159 sourceRect.width(), | |
| 160 sourceRect.height())); | |
| 161 // Translate the origin of pictureRect to destOffset. | |
| 162 // Note that destOffset is defined relative to sourceRect. | |
| 163 canvas->translate( | |
| 164 pictureRect.x() - sourceRect.x() + destOffset.width(), | |
| 165 pictureRect.y() - sourceRect.y() + destOffset.height()); | |
| 166 canvas->drawPicture(*update.picture); | |
| 167 | |
| 168 // Flush ganesh context so that all the rendered stuff appears on the | |
| 169 // texture. | |
| 170 paintGrContext->flush(); | |
| 171 | |
| 172 // Flush the GL context so rendering results from this context are | |
| 173 // visible in the compositor's context. | |
| 174 paintContext->flush(); | |
| 175 } | |
| 176 | |
| 177 if (update.bitmap) { | |
| 178 update.bitmap->lockPixels(); | |
| 179 update.texture->upload( | |
| 180 m_resourceProvider, | |
| 181 static_cast<const uint8_t*>(update.bitmap->getPixels()), | |
| 182 update.content_rect, | |
| 183 update.source_rect, | |
| 184 update.dest_offset); | |
| 185 update.bitmap->unlockPixels(); | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 void TextureUpdateController::finalize() | |
| 190 { | |
| 191 size_t uploadCount = 0; | |
| 192 while (m_queue->fullUploadSize()) { | |
| 193 if (!(uploadCount % textureUploadFlushPeriod) && uploadCount) | |
| 194 m_resourceProvider->shallowFlushIfSupported(); | |
| 195 | |
| 196 updateTexture(m_queue->takeFirstFullUpload()); | |
| 197 uploadCount++; | |
| 198 } | |
| 199 | |
| 200 while (m_queue->partialUploadSize()) { | |
| 201 if (!(uploadCount % textureUploadFlushPeriod) && uploadCount) | |
| 202 m_resourceProvider->shallowFlushIfSupported(); | |
| 203 | |
| 204 updateTexture(m_queue->takeFirstPartialUpload()); | |
| 205 uploadCount++; | |
| 206 } | |
| 207 | |
| 208 if (uploadCount) | |
| 209 m_resourceProvider->shallowFlushIfSupported(); | |
| 210 | |
| 211 if (m_queue->copySize()) { | |
| 212 TextureCopier* copier = m_resourceProvider->textureCopier(); | |
| 213 while (m_queue->copySize()) | |
| 214 copier->copyTexture(m_queue->takeFirstCopy()); | |
| 215 | |
| 216 // If we've performed any texture copies, we need to insert a flush | |
| 217 // here into the compositor context before letting the main thread | |
| 218 // proceed as it may make draw calls to the source texture of one of | |
| 219 // our copy operations. | |
| 220 copier->flush(); | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 void TextureUpdateController::onTimerFired() | |
| 225 { | |
| 226 ResourceProvider::debugNotifyEnterZone(0xB000000); | |
| 227 if (!updateMoreTexturesIfEnoughTimeRemaining()) | |
| 228 m_client->readyToFinalizeTextureUpdates(); | |
| 229 ResourceProvider::debugNotifyLeaveZone(); | |
| 230 } | |
| 231 | |
| 232 base::TimeTicks TextureUpdateController::now() const | |
| 233 { | |
| 234 return base::TimeTicks::Now(); | |
| 235 } | |
| 236 | |
| 237 base::TimeDelta TextureUpdateController::updateMoreTexturesTime() const | |
| 238 { | |
| 239 return base::TimeDelta::FromMilliseconds(textureUpdateTickRate * 1000); | |
| 240 } | |
| 241 | |
| 242 size_t TextureUpdateController::updateMoreTexturesSize() const | |
| 243 { | |
| 244 return m_textureUpdatesPerTick; | |
| 245 } | |
| 246 | |
| 247 size_t TextureUpdateController::maxBlockingUpdates() const | |
| 248 { | |
| 249 return updateMoreTexturesSize() * maxBlockingUpdateIntervals; | |
| 250 } | |
| 251 | |
| 252 bool TextureUpdateController::updateMoreTexturesIfEnoughTimeRemaining() | |
| 253 { | |
| 254 // Blocking uploads will increase when we're too aggressive in our upload | |
| 255 // time estimate. We use a different timeout here to prevent unnecessary | |
| 256 // amounts of idle time when blocking uploads have reached the max. | |
| 257 if (m_resourceProvider->numBlockingUploads() >= maxBlockingUpdates()) { | |
| 258 m_timer->startOneShot(uploaderBusyTickRate); | |
| 259 return true; | |
| 260 } | |
| 261 | |
| 262 if (!m_queue->fullUploadSize()) | |
| 263 return false; | |
| 264 | |
| 265 bool hasTimeRemaining = m_timeLimit.is_null() || | |
| 266 this->now() < m_timeLimit - updateMoreTexturesTime(); | |
| 267 if (hasTimeRemaining) | |
| 268 updateMoreTexturesNow(); | |
| 269 | |
| 270 return true; | |
| 271 } | |
| 272 | |
| 273 void TextureUpdateController::updateMoreTexturesNow() | |
| 274 { | |
| 275 size_t uploads = std::min( | |
| 276 m_queue->fullUploadSize(), updateMoreTexturesSize()); | |
| 277 m_timer->startOneShot( | |
| 278 updateMoreTexturesTime().InSecondsF() / updateMoreTexturesSize() * | |
| 279 uploads); | |
| 280 | |
| 281 if (!uploads) | |
| 282 return; | |
| 283 | |
| 284 size_t uploadCount = 0; | |
| 285 while (m_queue->fullUploadSize() && uploadCount < uploads) { | |
| 286 if (!(uploadCount % textureUploadFlushPeriod) && uploadCount) | |
| 287 m_resourceProvider->shallowFlushIfSupported(); | |
| 288 updateTexture(m_queue->takeFirstFullUpload()); | |
| 289 uploadCount++; | |
| 290 } | |
| 291 m_resourceProvider->shallowFlushIfSupported(); | |
| 292 } | |
| 293 | |
| 294 } // namespace cc | |
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Chromium Code Reviews
Issue 11270047:
cc: Rename TextureUpdate to ResourceUpdate. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src