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| 1 /* | |
| 2 * Copyright (c) 2010, Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 | |
| 32 #include "sky/engine/platform/graphics/gpu/DrawingBuffer.h" | |
| 33 | |
| 34 #include <algorithm> | |
| 35 #include "gen/sky/platform/RuntimeEnabledFeatures.h" | |
| 36 #include "sky/engine/platform/TraceEvent.h" | |
| 37 #include "sky/engine/platform/graphics/ImageBuffer.h" | |
| 38 #include "sky/engine/platform/graphics/gpu/Extensions3DUtil.h" | |
| 39 #include "sky/engine/public/platform/Platform.h" | |
| 40 #include "sky/engine/public/platform/WebExternalBitmap.h" | |
| 41 #include "sky/engine/public/platform/WebExternalTextureLayer.h" | |
| 42 #include "sky/engine/public/platform/WebGraphicsContext3D.h" | |
| 43 #include "sky/engine/public/platform/WebGraphicsContext3DProvider.h" | |
| 44 #ifndef NDEBUG | |
| 45 #include "sky/engine/wtf/RefCountedLeakCounter.h" | |
| 46 #endif | |
| 47 | |
| 48 namespace blink { | |
| 49 | |
| 50 namespace { | |
| 51 // Global resource ceiling (expressed in terms of pixels) for DrawingBuffer crea
tion and resize. | |
| 52 // When this limit is set, DrawingBuffer::create() and DrawingBuffer::reset() ca
lls that would | |
| 53 // exceed the global cap will instead clear the buffer. | |
| 54 const int s_maximumResourceUsePixels = 16 * 1024 * 1024; | |
| 55 int s_currentResourceUsePixels = 0; | |
| 56 const float s_resourceAdjustedRatio = 0.5; | |
| 57 | |
| 58 const bool s_allowContextEvictionOnCreate = true; | |
| 59 const int s_maxScaleAttempts = 3; | |
| 60 | |
| 61 DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, drawingBufferCounter, ("Dra
wingBuffer")); | |
| 62 | |
| 63 class ScopedTextureUnit0BindingRestorer { | |
| 64 public: | |
| 65 ScopedTextureUnit0BindingRestorer(WebGraphicsContext3D* context, GLenum acti
veTextureUnit, Platform3DObject textureUnitZeroId) | |
| 66 : m_context(context) | |
| 67 , m_oldActiveTextureUnit(activeTextureUnit) | |
| 68 , m_oldTextureUnitZeroId(textureUnitZeroId) | |
| 69 { | |
| 70 m_context->activeTexture(GL_TEXTURE0); | |
| 71 } | |
| 72 ~ScopedTextureUnit0BindingRestorer() | |
| 73 { | |
| 74 m_context->bindTexture(GL_TEXTURE_2D, m_oldTextureUnitZeroId); | |
| 75 m_context->activeTexture(m_oldActiveTextureUnit); | |
| 76 } | |
| 77 | |
| 78 private: | |
| 79 WebGraphicsContext3D* m_context; | |
| 80 GLenum m_oldActiveTextureUnit; | |
| 81 Platform3DObject m_oldTextureUnitZeroId; | |
| 82 }; | |
| 83 | |
| 84 } // namespace | |
| 85 | |
| 86 PassRefPtr<DrawingBuffer> DrawingBuffer::create(PassOwnPtr<WebGraphicsContext3D>
context, const IntSize& size, PreserveDrawingBuffer preserve, WebGraphicsContex
t3D::Attributes requestedAttributes, PassRefPtr<ContextEvictionManager> contextE
victionManager) | |
| 87 { | |
| 88 ASSERT(context); | |
| 89 OwnPtr<Extensions3DUtil> extensionsUtil = Extensions3DUtil::create(context.g
et()); | |
| 90 if (!extensionsUtil) { | |
| 91 // This might be the first time we notice that the WebGraphicsContext3D
is lost. | |
| 92 return nullptr; | |
| 93 } | |
| 94 bool multisampleSupported = extensionsUtil->supportsExtension("GL_CHROMIUM_f
ramebuffer_multisample") | |
| 95 && extensionsUtil->supportsExtension("GL_OES_rgb8_rgba8"); | |
| 96 if (multisampleSupported) { | |
| 97 extensionsUtil->ensureExtensionEnabled("GL_CHROMIUM_framebuffer_multisam
ple"); | |
| 98 extensionsUtil->ensureExtensionEnabled("GL_OES_rgb8_rgba8"); | |
| 99 } | |
| 100 bool packedDepthStencilSupported = extensionsUtil->supportsExtension("GL_OES
_packed_depth_stencil"); | |
| 101 if (packedDepthStencilSupported) | |
| 102 extensionsUtil->ensureExtensionEnabled("GL_OES_packed_depth_stencil"); | |
| 103 | |
| 104 RefPtr<DrawingBuffer> drawingBuffer = adoptRef(new DrawingBuffer(context, ex
tensionsUtil.release(), multisampleSupported, packedDepthStencilSupported, prese
rve, requestedAttributes, contextEvictionManager)); | |
| 105 if (!drawingBuffer->initialize(size)) { | |
| 106 drawingBuffer->beginDestruction(); | |
| 107 return PassRefPtr<DrawingBuffer>(); | |
| 108 } | |
| 109 return drawingBuffer.release(); | |
| 110 } | |
| 111 | |
| 112 DrawingBuffer::DrawingBuffer(PassOwnPtr<WebGraphicsContext3D> context, | |
| 113 PassOwnPtr<Extensions3DUtil> extensionsUtil, | |
| 114 bool multisampleExtensionSupported, | |
| 115 bool packedDepthStencilExtensionSupported, | |
| 116 PreserveDrawingBuffer preserve, | |
| 117 WebGraphicsContext3D::Attributes requestedAttributes, | |
| 118 PassRefPtr<ContextEvictionManager> contextEvictionManager) | |
| 119 : m_preserveDrawingBuffer(preserve) | |
| 120 , m_scissorEnabled(false) | |
| 121 , m_texture2DBinding(0) | |
| 122 , m_framebufferBinding(0) | |
| 123 , m_activeTextureUnit(GL_TEXTURE0) | |
| 124 , m_context(context) | |
| 125 , m_extensionsUtil(extensionsUtil) | |
| 126 , m_size(-1, -1) | |
| 127 , m_requestedAttributes(requestedAttributes) | |
| 128 , m_multisampleExtensionSupported(multisampleExtensionSupported) | |
| 129 , m_packedDepthStencilExtensionSupported(packedDepthStencilExtensionSupporte
d) | |
| 130 , m_fbo(0) | |
| 131 , m_depthStencilBuffer(0) | |
| 132 , m_depthBuffer(0) | |
| 133 , m_stencilBuffer(0) | |
| 134 , m_multisampleFBO(0) | |
| 135 , m_multisampleColorBuffer(0) | |
| 136 , m_contentsChanged(true) | |
| 137 , m_contentsChangeCommitted(false) | |
| 138 , m_layerComposited(false) | |
| 139 , m_multisampleMode(None) | |
| 140 , m_internalColorFormat(0) | |
| 141 , m_colorFormat(0) | |
| 142 , m_internalRenderbufferFormat(0) | |
| 143 , m_maxTextureSize(0) | |
| 144 , m_sampleCount(0) | |
| 145 , m_packAlignment(4) | |
| 146 , m_destructionInProgress(false) | |
| 147 , m_isHidden(false) | |
| 148 , m_contextEvictionManager(contextEvictionManager) | |
| 149 { | |
| 150 // Used by browser tests to detect the use of a DrawingBuffer. | |
| 151 TRACE_EVENT_INSTANT0("test_gpu", "DrawingBufferCreation", TRACE_EVENT_SCOPE_
NAME_PROCESS); | |
| 152 #ifndef NDEBUG | |
| 153 drawingBufferCounter.increment(); | |
| 154 #endif | |
| 155 } | |
| 156 | |
| 157 DrawingBuffer::~DrawingBuffer() | |
| 158 { | |
| 159 ASSERT(m_destructionInProgress); | |
| 160 ASSERT(m_textureMailboxes.isEmpty()); | |
| 161 m_layer.clear(); | |
| 162 m_context.clear(); | |
| 163 #ifndef NDEBUG | |
| 164 drawingBufferCounter.decrement(); | |
| 165 #endif | |
| 166 } | |
| 167 | |
| 168 void DrawingBuffer::markContentsChanged() | |
| 169 { | |
| 170 m_contentsChanged = true; | |
| 171 m_contentsChangeCommitted = false; | |
| 172 m_layerComposited = false; | |
| 173 } | |
| 174 | |
| 175 bool DrawingBuffer::layerComposited() const | |
| 176 { | |
| 177 return m_layerComposited; | |
| 178 } | |
| 179 | |
| 180 void DrawingBuffer::markLayerComposited() | |
| 181 { | |
| 182 m_layerComposited = true; | |
| 183 } | |
| 184 | |
| 185 WebGraphicsContext3D* DrawingBuffer::context() | |
| 186 { | |
| 187 return m_context.get(); | |
| 188 } | |
| 189 | |
| 190 void DrawingBuffer::setIsHidden(bool hidden) | |
| 191 { | |
| 192 if (m_isHidden == hidden) | |
| 193 return; | |
| 194 m_isHidden = hidden; | |
| 195 if (m_isHidden) | |
| 196 freeRecycledMailboxes(); | |
| 197 } | |
| 198 | |
| 199 void DrawingBuffer::freeRecycledMailboxes() | |
| 200 { | |
| 201 if (m_recycledMailboxQueue.isEmpty()) | |
| 202 return; | |
| 203 while (!m_recycledMailboxQueue.isEmpty()) | |
| 204 deleteMailbox(m_recycledMailboxQueue.takeLast()); | |
| 205 } | |
| 206 | |
| 207 bool DrawingBuffer::prepareMailbox(WebExternalTextureMailbox* outMailbox, WebExt
ernalBitmap* bitmap) | |
| 208 { | |
| 209 ASSERT(!m_isHidden); | |
| 210 if (!m_contentsChanged) | |
| 211 return false; | |
| 212 | |
| 213 if (m_destructionInProgress) { | |
| 214 // It can be hit in the following sequence. | |
| 215 // 1. WebGL draws something. | |
| 216 // 2. The compositor begins the frame. | |
| 217 // 3. Javascript makes a context lost using WEBGL_lose_context extension
. | |
| 218 // 4. Here. | |
| 219 return false; | |
| 220 } | |
| 221 | |
| 222 // Resolve the multisampled buffer into m_colorBuffer texture. | |
| 223 if (m_multisampleMode != None) | |
| 224 commit(); | |
| 225 | |
| 226 if (bitmap) { | |
| 227 bitmap->setSize(size()); | |
| 228 | |
| 229 unsigned char* pixels = bitmap->pixels(); | |
| 230 bool needPremultiply = m_actualAttributes.alpha && !m_actualAttributes.p
remultipliedAlpha; | |
| 231 WebGLImageConversion::AlphaOp op = needPremultiply ? WebGLImageConversio
n::AlphaDoPremultiply : WebGLImageConversion::AlphaDoNothing; | |
| 232 if (pixels) | |
| 233 readBackFramebuffer(pixels, size().width(), size().height(), Readbac
kSkia, op); | |
| 234 } | |
| 235 | |
| 236 // We must restore the texture binding since creating new textures, | |
| 237 // consuming and producing mailboxes changes it. | |
| 238 ScopedTextureUnit0BindingRestorer restorer(m_context.get(), m_activeTextureU
nit, m_texture2DBinding); | |
| 239 | |
| 240 // First try to recycle an old buffer. | |
| 241 RefPtr<MailboxInfo> frontColorBufferMailbox = recycledMailbox(); | |
| 242 | |
| 243 // No buffer available to recycle, create a new one. | |
| 244 if (!frontColorBufferMailbox) { | |
| 245 TextureInfo newTexture; | |
| 246 newTexture.textureId = createColorTexture(); | |
| 247 allocateTextureMemory(&newTexture, m_size); | |
| 248 // Bad things happened, abandon ship. | |
| 249 if (!newTexture.textureId) | |
| 250 return false; | |
| 251 | |
| 252 frontColorBufferMailbox = createNewMailbox(newTexture); | |
| 253 } | |
| 254 | |
| 255 if (m_preserveDrawingBuffer == Discard) { | |
| 256 std::swap(frontColorBufferMailbox->textureInfo, m_colorBuffer); | |
| 257 // It appears safe to overwrite the context's framebuffer binding in the
Discard case since there will always be a | |
| 258 // WebGLRenderingContext::clearIfComposited() call made before the next
draw call which restores the framebuffer binding. | |
| 259 // If this stops being true at some point, we should track the current f
ramebuffer binding in the DrawingBuffer and restore | |
| 260 // it after attaching the new back buffer here. | |
| 261 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_fbo); | |
| 262 if (m_multisampleMode == ImplicitResolve) | |
| 263 m_context->framebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COL
OR_ATTACHMENT0, GL_TEXTURE_2D, m_colorBuffer.textureId, 0, m_sampleCount); | |
| 264 else | |
| 265 m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0
, GL_TEXTURE_2D, m_colorBuffer.textureId, 0); | |
| 266 } else { | |
| 267 m_context->copyTextureCHROMIUM(GL_TEXTURE_2D, m_colorBuffer.textureId, f
rontColorBufferMailbox->textureInfo.textureId, 0, GL_RGBA, GL_UNSIGNED_BYTE); | |
| 268 } | |
| 269 | |
| 270 if (m_multisampleMode != None && !m_framebufferBinding) | |
| 271 bind(); | |
| 272 else | |
| 273 restoreFramebufferBinding(); | |
| 274 | |
| 275 m_contentsChanged = false; | |
| 276 | |
| 277 m_context->produceTextureDirectCHROMIUM(frontColorBufferMailbox->textureInfo
.textureId, GL_TEXTURE_2D, frontColorBufferMailbox->mailbox.name); | |
| 278 m_context->flush(); | |
| 279 frontColorBufferMailbox->mailbox.syncPoint = m_context->insertSyncPoint(); | |
| 280 frontColorBufferMailbox->mailbox.allowOverlay = frontColorBufferMailbox->tex
tureInfo.imageId != 0; | |
| 281 markLayerComposited(); | |
| 282 | |
| 283 // set m_parentDrawingBuffer to make sure 'this' stays alive as long as it h
as live mailboxes | |
| 284 ASSERT(!frontColorBufferMailbox->m_parentDrawingBuffer); | |
| 285 frontColorBufferMailbox->m_parentDrawingBuffer = this; | |
| 286 *outMailbox = frontColorBufferMailbox->mailbox; | |
| 287 m_frontColorBuffer = frontColorBufferMailbox->textureInfo; | |
| 288 return true; | |
| 289 } | |
| 290 | |
| 291 void DrawingBuffer::mailboxReleased(const WebExternalTextureMailbox& mailbox, bo
ol lostResource) | |
| 292 { | |
| 293 if (m_destructionInProgress || m_context->isContextLost() || lostResource ||
m_isHidden) { | |
| 294 mailboxReleasedWithoutRecycling(mailbox); | |
| 295 return; | |
| 296 } | |
| 297 | |
| 298 for (size_t i = 0; i < m_textureMailboxes.size(); i++) { | |
| 299 RefPtr<MailboxInfo> mailboxInfo = m_textureMailboxes[i]; | |
| 300 if (nameEquals(mailboxInfo->mailbox, mailbox)) { | |
| 301 mailboxInfo->mailbox.syncPoint = mailbox.syncPoint; | |
| 302 ASSERT(mailboxInfo->m_parentDrawingBuffer.get() == this); | |
| 303 mailboxInfo->m_parentDrawingBuffer.clear(); | |
| 304 m_recycledMailboxQueue.prepend(mailboxInfo->mailbox); | |
| 305 return; | |
| 306 } | |
| 307 } | |
| 308 ASSERT_NOT_REACHED(); | |
| 309 } | |
| 310 | |
| 311 void DrawingBuffer::mailboxReleasedWithoutRecycling(const WebExternalTextureMail
box& mailbox) | |
| 312 { | |
| 313 ASSERT(m_textureMailboxes.size()); | |
| 314 // Ensure not to call the destructor until deleteMailbox() is completed. | |
| 315 RefPtr<DrawingBuffer> self = this; | |
| 316 deleteMailbox(mailbox); | |
| 317 } | |
| 318 | |
| 319 PassRefPtr<DrawingBuffer::MailboxInfo> DrawingBuffer::recycledMailbox() | |
| 320 { | |
| 321 if (m_recycledMailboxQueue.isEmpty()) | |
| 322 return PassRefPtr<MailboxInfo>(); | |
| 323 | |
| 324 WebExternalTextureMailbox mailbox; | |
| 325 while (!m_recycledMailboxQueue.isEmpty()) { | |
| 326 mailbox = m_recycledMailboxQueue.takeLast(); | |
| 327 // Never have more than one mailbox in the released state. | |
| 328 if (!m_recycledMailboxQueue.isEmpty()) | |
| 329 deleteMailbox(mailbox); | |
| 330 } | |
| 331 | |
| 332 RefPtr<MailboxInfo> mailboxInfo; | |
| 333 for (size_t i = 0; i < m_textureMailboxes.size(); i++) { | |
| 334 if (nameEquals(m_textureMailboxes[i]->mailbox, mailbox)) { | |
| 335 mailboxInfo = m_textureMailboxes[i]; | |
| 336 break; | |
| 337 } | |
| 338 } | |
| 339 ASSERT(mailboxInfo); | |
| 340 | |
| 341 if (mailboxInfo->mailbox.syncPoint) { | |
| 342 m_context->waitSyncPoint(mailboxInfo->mailbox.syncPoint); | |
| 343 mailboxInfo->mailbox.syncPoint = 0; | |
| 344 } | |
| 345 | |
| 346 if (mailboxInfo->size != m_size) { | |
| 347 m_context->bindTexture(GL_TEXTURE_2D, mailboxInfo->textureInfo.textureId
); | |
| 348 allocateTextureMemory(&mailboxInfo->textureInfo, m_size); | |
| 349 mailboxInfo->size = m_size; | |
| 350 } | |
| 351 | |
| 352 return mailboxInfo.release(); | |
| 353 } | |
| 354 | |
| 355 PassRefPtr<DrawingBuffer::MailboxInfo> DrawingBuffer::createNewMailbox(const Tex
tureInfo& info) | |
| 356 { | |
| 357 RefPtr<MailboxInfo> returnMailbox = adoptRef(new MailboxInfo()); | |
| 358 m_context->genMailboxCHROMIUM(returnMailbox->mailbox.name); | |
| 359 returnMailbox->textureInfo = info; | |
| 360 returnMailbox->size = m_size; | |
| 361 m_textureMailboxes.append(returnMailbox); | |
| 362 return returnMailbox.release(); | |
| 363 } | |
| 364 | |
| 365 void DrawingBuffer::deleteMailbox(const WebExternalTextureMailbox& mailbox) | |
| 366 { | |
| 367 for (size_t i = 0; i < m_textureMailboxes.size(); i++) { | |
| 368 if (nameEquals(m_textureMailboxes[i]->mailbox, mailbox)) { | |
| 369 if (mailbox.syncPoint) | |
| 370 m_context->waitSyncPoint(mailbox.syncPoint); | |
| 371 | |
| 372 deleteChromiumImageForTexture(&m_textureMailboxes[i]->textureInfo); | |
| 373 | |
| 374 m_context->deleteTexture(m_textureMailboxes[i]->textureInfo.textureI
d); | |
| 375 m_textureMailboxes.remove(i); | |
| 376 return; | |
| 377 } | |
| 378 } | |
| 379 ASSERT_NOT_REACHED(); | |
| 380 } | |
| 381 | |
| 382 bool DrawingBuffer::initialize(const IntSize& size) | |
| 383 { | |
| 384 if (m_context->isContextLost()) { | |
| 385 // Need to try to restore the context again later. | |
| 386 return false; | |
| 387 } | |
| 388 | |
| 389 if (m_requestedAttributes.alpha) { | |
| 390 m_internalColorFormat = GL_RGBA; | |
| 391 m_colorFormat = GL_RGBA; | |
| 392 m_internalRenderbufferFormat = GL_RGBA8_OES; | |
| 393 } else { | |
| 394 m_internalColorFormat = GL_RGB; | |
| 395 m_colorFormat = GL_RGB; | |
| 396 m_internalRenderbufferFormat = GL_RGB8_OES; | |
| 397 } | |
| 398 | |
| 399 m_context->getIntegerv(GL_MAX_TEXTURE_SIZE, &m_maxTextureSize); | |
| 400 | |
| 401 int maxSampleCount = 0; | |
| 402 m_multisampleMode = None; | |
| 403 if (m_requestedAttributes.antialias && m_multisampleExtensionSupported) { | |
| 404 m_context->getIntegerv(GL_MAX_SAMPLES_ANGLE, &maxSampleCount); | |
| 405 m_multisampleMode = ExplicitResolve; | |
| 406 if (m_extensionsUtil->supportsExtension("GL_EXT_multisampled_render_to_t
exture")) | |
| 407 m_multisampleMode = ImplicitResolve; | |
| 408 } | |
| 409 m_sampleCount = std::min(4, maxSampleCount); | |
| 410 | |
| 411 m_fbo = m_context->createFramebuffer(); | |
| 412 | |
| 413 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_fbo); | |
| 414 m_colorBuffer.textureId = createColorTexture(); | |
| 415 if (m_multisampleMode == ImplicitResolve) | |
| 416 m_context->framebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COLOR_A
TTACHMENT0, GL_TEXTURE_2D, m_colorBuffer.textureId, 0, m_sampleCount); | |
| 417 else | |
| 418 m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL
_TEXTURE_2D, m_colorBuffer.textureId, 0); | |
| 419 createSecondaryBuffers(); | |
| 420 // We first try to initialize everything with the requested attributes. | |
| 421 if (!reset(size)) | |
| 422 return false; | |
| 423 // If that succeeds, we then see what we actually got and update our actual
attributes to reflect that. | |
| 424 m_actualAttributes = m_requestedAttributes; | |
| 425 if (m_requestedAttributes.alpha) { | |
| 426 WGC3Dint alphaBits = 0; | |
| 427 m_context->getIntegerv(GL_ALPHA_BITS, &alphaBits); | |
| 428 m_actualAttributes.alpha = alphaBits > 0; | |
| 429 } | |
| 430 if (m_requestedAttributes.depth) { | |
| 431 WGC3Dint depthBits = 0; | |
| 432 m_context->getIntegerv(GL_DEPTH_BITS, &depthBits); | |
| 433 m_actualAttributes.depth = depthBits > 0; | |
| 434 } | |
| 435 if (m_requestedAttributes.stencil) { | |
| 436 WGC3Dint stencilBits = 0; | |
| 437 m_context->getIntegerv(GL_STENCIL_BITS, &stencilBits); | |
| 438 m_actualAttributes.stencil = stencilBits > 0; | |
| 439 } | |
| 440 m_actualAttributes.antialias = multisample(); | |
| 441 return true; | |
| 442 } | |
| 443 | |
| 444 bool DrawingBuffer::copyToPlatformTexture(WebGraphicsContext3D* context, Platfor
m3DObject texture, GLenum internalFormat, GLenum destType, GLint level, bool pre
multiplyAlpha, bool flipY, bool fromFrontBuffer) | |
| 445 { | |
| 446 GLint textureId = m_colorBuffer.textureId; | |
| 447 if (fromFrontBuffer && m_frontColorBuffer.textureId) | |
| 448 textureId = m_frontColorBuffer.textureId; | |
| 449 | |
| 450 if (m_contentsChanged) { | |
| 451 if (m_multisampleMode != None) { | |
| 452 commit(); | |
| 453 if (!m_framebufferBinding) | |
| 454 bind(); | |
| 455 else | |
| 456 restoreFramebufferBinding(); | |
| 457 } | |
| 458 m_context->flush(); | |
| 459 } | |
| 460 | |
| 461 if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(internalFormat, destType, l
evel)) | |
| 462 return false; | |
| 463 | |
| 464 // Contexts may be in a different share group. We must transfer the texture
through a mailbox first | |
| 465 RefPtr<MailboxInfo> bufferMailbox = adoptRef(new MailboxInfo()); | |
| 466 m_context->genMailboxCHROMIUM(bufferMailbox->mailbox.name); | |
| 467 m_context->produceTextureDirectCHROMIUM(textureId, GL_TEXTURE_2D, bufferMail
box->mailbox.name); | |
| 468 m_context->flush(); | |
| 469 | |
| 470 bufferMailbox->mailbox.syncPoint = m_context->insertSyncPoint(); | |
| 471 | |
| 472 context->waitSyncPoint(bufferMailbox->mailbox.syncPoint); | |
| 473 Platform3DObject sourceTexture = context->createAndConsumeTextureCHROMIUM(GL
_TEXTURE_2D, bufferMailbox->mailbox.name); | |
| 474 | |
| 475 bool unpackPremultiplyAlphaNeeded = false; | |
| 476 bool unpackUnpremultiplyAlphaNeeded = false; | |
| 477 if (m_actualAttributes.alpha && m_actualAttributes.premultipliedAlpha && !pr
emultiplyAlpha) | |
| 478 unpackUnpremultiplyAlphaNeeded = true; | |
| 479 else if (m_actualAttributes.alpha && !m_actualAttributes.premultipliedAlpha
&& premultiplyAlpha) | |
| 480 unpackPremultiplyAlphaNeeded = true; | |
| 481 | |
| 482 context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, unpackUnpremu
ltiplyAlphaNeeded); | |
| 483 context->pixelStorei(GC3D_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM, unpackPremultip
lyAlphaNeeded); | |
| 484 context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, flipY); | |
| 485 context->copyTextureCHROMIUM(GL_TEXTURE_2D, sourceTexture, texture, level, i
nternalFormat, destType); | |
| 486 context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, false); | |
| 487 context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, false); | |
| 488 context->pixelStorei(GC3D_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM, false); | |
| 489 | |
| 490 context->deleteTexture(sourceTexture); | |
| 491 | |
| 492 context->flush(); | |
| 493 m_context->waitSyncPoint(context->insertSyncPoint()); | |
| 494 | |
| 495 return true; | |
| 496 } | |
| 497 | |
| 498 Platform3DObject DrawingBuffer::framebuffer() const | |
| 499 { | |
| 500 return m_fbo; | |
| 501 } | |
| 502 | |
| 503 WebLayer* DrawingBuffer::platformLayer() | |
| 504 { | |
| 505 if (!m_layer) { | |
| 506 m_layer = nullptr; | |
| 507 CRASH(); // No compositor. | |
| 508 | |
| 509 m_layer->setOpaque(!m_actualAttributes.alpha); | |
| 510 m_layer->setBlendBackgroundColor(m_actualAttributes.alpha); | |
| 511 m_layer->setPremultipliedAlpha(m_actualAttributes.premultipliedAlpha); | |
| 512 } | |
| 513 | |
| 514 return m_layer->layer(); | |
| 515 } | |
| 516 | |
| 517 void DrawingBuffer::paintCompositedResultsToCanvas(ImageBuffer* imageBuffer) | |
| 518 { | |
| 519 if (m_context->getGraphicsResetStatusARB() != GL_NO_ERROR) | |
| 520 return; | |
| 521 | |
| 522 if (!imageBuffer) | |
| 523 return; | |
| 524 Platform3DObject tex = imageBuffer->getBackingTexture(); | |
| 525 if (tex) { | |
| 526 RefPtr<MailboxInfo> bufferMailbox = adoptRef(new MailboxInfo()); | |
| 527 m_context->genMailboxCHROMIUM(bufferMailbox->mailbox.name); | |
| 528 m_context->produceTextureDirectCHROMIUM(m_frontColorBuffer.textureId, GL
_TEXTURE_2D, bufferMailbox->mailbox.name); | |
| 529 m_context->flush(); | |
| 530 | |
| 531 bufferMailbox->mailbox.syncPoint = m_context->insertSyncPoint(); | |
| 532 OwnPtr<WebGraphicsContext3DProvider> provider = | |
| 533 adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3D
Provider()); | |
| 534 if (!provider) | |
| 535 return; | |
| 536 WebGraphicsContext3D* context = provider->context3d(); | |
| 537 if (!context) | |
| 538 return; | |
| 539 | |
| 540 context->waitSyncPoint(bufferMailbox->mailbox.syncPoint); | |
| 541 Platform3DObject sourceTexture = context->createAndConsumeTextureCHROMIU
M(GL_TEXTURE_2D, bufferMailbox->mailbox.name); | |
| 542 context->copyTextureCHROMIUM(GL_TEXTURE_2D, sourceTexture, | |
| 543 tex, 0, GL_RGBA, GL_UNSIGNED_BYTE); | |
| 544 context->deleteTexture(sourceTexture); | |
| 545 context->flush(); | |
| 546 m_context->waitSyncPoint(context->insertSyncPoint()); | |
| 547 return; | |
| 548 } | |
| 549 | |
| 550 Platform3DObject framebuffer = m_context->createFramebuffer(); | |
| 551 m_context->bindFramebuffer(GL_FRAMEBUFFER, framebuffer); | |
| 552 // We don't need to bind a copy of m_frontColorBuffer since the texture para
meters are untouched. | |
| 553 m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEX
TURE_2D, m_frontColorBuffer.textureId, 0); | |
| 554 | |
| 555 paintFramebufferToCanvas(framebuffer, size().width(), size().height(), !m_ac
tualAttributes.premultipliedAlpha, imageBuffer); | |
| 556 m_context->deleteFramebuffer(framebuffer); | |
| 557 // Since we're using the same context as WebGL, we have to restore any state
we change (in this case, just the framebuffer binding). | |
| 558 restoreFramebufferBinding(); | |
| 559 } | |
| 560 | |
| 561 void DrawingBuffer::clearPlatformLayer() | |
| 562 { | |
| 563 if (m_layer) | |
| 564 m_layer->clearTexture(); | |
| 565 | |
| 566 m_context->flush(); | |
| 567 } | |
| 568 | |
| 569 void DrawingBuffer::beginDestruction() | |
| 570 { | |
| 571 ASSERT(!m_destructionInProgress); | |
| 572 m_destructionInProgress = true; | |
| 573 | |
| 574 clearPlatformLayer(); | |
| 575 | |
| 576 while (!m_recycledMailboxQueue.isEmpty()) | |
| 577 deleteMailbox(m_recycledMailboxQueue.takeLast()); | |
| 578 | |
| 579 if (m_multisampleFBO) | |
| 580 m_context->deleteFramebuffer(m_multisampleFBO); | |
| 581 | |
| 582 if (m_fbo) | |
| 583 m_context->deleteFramebuffer(m_fbo); | |
| 584 | |
| 585 if (m_multisampleColorBuffer) | |
| 586 m_context->deleteRenderbuffer(m_multisampleColorBuffer); | |
| 587 | |
| 588 if (m_depthStencilBuffer) | |
| 589 m_context->deleteRenderbuffer(m_depthStencilBuffer); | |
| 590 | |
| 591 if (m_depthBuffer) | |
| 592 m_context->deleteRenderbuffer(m_depthBuffer); | |
| 593 | |
| 594 if (m_stencilBuffer) | |
| 595 m_context->deleteRenderbuffer(m_stencilBuffer); | |
| 596 | |
| 597 if (m_colorBuffer.textureId) { | |
| 598 deleteChromiumImageForTexture(&m_colorBuffer); | |
| 599 m_context->deleteTexture(m_colorBuffer.textureId); | |
| 600 } | |
| 601 | |
| 602 setSize(IntSize()); | |
| 603 | |
| 604 m_colorBuffer = TextureInfo(); | |
| 605 m_frontColorBuffer = TextureInfo(); | |
| 606 m_multisampleColorBuffer = 0; | |
| 607 m_depthStencilBuffer = 0; | |
| 608 m_depthBuffer = 0; | |
| 609 m_stencilBuffer = 0; | |
| 610 m_multisampleFBO = 0; | |
| 611 m_fbo = 0; | |
| 612 m_contextEvictionManager.clear(); | |
| 613 } | |
| 614 | |
| 615 unsigned DrawingBuffer::createColorTexture() | |
| 616 { | |
| 617 unsigned offscreenColorTexture = m_context->createTexture(); | |
| 618 if (!offscreenColorTexture) | |
| 619 return 0; | |
| 620 | |
| 621 m_context->bindTexture(GL_TEXTURE_2D, offscreenColorTexture); | |
| 622 m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); | |
| 623 m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); | |
| 624 m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
; | |
| 625 m_context->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
; | |
| 626 | |
| 627 return offscreenColorTexture; | |
| 628 } | |
| 629 | |
| 630 void DrawingBuffer::createSecondaryBuffers() | |
| 631 { | |
| 632 // create a multisample FBO | |
| 633 if (m_multisampleMode == ExplicitResolve) { | |
| 634 m_multisampleFBO = m_context->createFramebuffer(); | |
| 635 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_multisampleFBO); | |
| 636 m_multisampleColorBuffer = m_context->createRenderbuffer(); | |
| 637 } | |
| 638 } | |
| 639 | |
| 640 bool DrawingBuffer::resizeFramebuffer(const IntSize& size) | |
| 641 { | |
| 642 // resize regular FBO | |
| 643 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_fbo); | |
| 644 | |
| 645 m_context->bindTexture(GL_TEXTURE_2D, m_colorBuffer.textureId); | |
| 646 | |
| 647 allocateTextureMemory(&m_colorBuffer, size); | |
| 648 | |
| 649 if (m_multisampleMode == ImplicitResolve) | |
| 650 m_context->framebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COLOR_A
TTACHMENT0, GL_TEXTURE_2D, m_colorBuffer.textureId, 0, m_sampleCount); | |
| 651 else | |
| 652 m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL
_TEXTURE_2D, m_colorBuffer.textureId, 0); | |
| 653 | |
| 654 m_context->bindTexture(GL_TEXTURE_2D, 0); | |
| 655 | |
| 656 if (m_multisampleMode != ExplicitResolve) | |
| 657 resizeDepthStencil(size); | |
| 658 if (m_context->checkFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMP
LETE) | |
| 659 return false; | |
| 660 | |
| 661 return true; | |
| 662 } | |
| 663 | |
| 664 bool DrawingBuffer::resizeMultisampleFramebuffer(const IntSize& size) | |
| 665 { | |
| 666 if (m_multisampleMode == ExplicitResolve) { | |
| 667 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_multisampleFBO); | |
| 668 | |
| 669 m_context->bindRenderbuffer(GL_RENDERBUFFER, m_multisampleColorBuffer); | |
| 670 m_context->renderbufferStorageMultisampleCHROMIUM(GL_RENDERBUFFER, m_sam
pleCount, m_internalRenderbufferFormat, size.width(), size.height()); | |
| 671 | |
| 672 if (m_context->getError() == GL_OUT_OF_MEMORY) | |
| 673 return false; | |
| 674 | |
| 675 m_context->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, m_multisampleColorBuffer); | |
| 676 resizeDepthStencil(size); | |
| 677 if (m_context->checkFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_
COMPLETE) | |
| 678 return false; | |
| 679 } | |
| 680 | |
| 681 return true; | |
| 682 } | |
| 683 | |
| 684 void DrawingBuffer::resizeDepthStencil(const IntSize& size) | |
| 685 { | |
| 686 if (!m_requestedAttributes.depth && !m_requestedAttributes.stencil) | |
| 687 return; | |
| 688 | |
| 689 if (m_packedDepthStencilExtensionSupported) { | |
| 690 if (!m_depthStencilBuffer) | |
| 691 m_depthStencilBuffer = m_context->createRenderbuffer(); | |
| 692 m_context->bindRenderbuffer(GL_RENDERBUFFER, m_depthStencilBuffer); | |
| 693 if (m_multisampleMode == ImplicitResolve) | |
| 694 m_context->renderbufferStorageMultisampleEXT(GL_RENDERBUFFER, m_samp
leCount, GL_DEPTH24_STENCIL8_OES, size.width(), size.height()); | |
| 695 else if (m_multisampleMode == ExplicitResolve) | |
| 696 m_context->renderbufferStorageMultisampleCHROMIUM(GL_RENDERBUFFER, m
_sampleCount, GL_DEPTH24_STENCIL8_OES, size.width(), size.height()); | |
| 697 else | |
| 698 m_context->renderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8_
OES, size.width(), size.height()); | |
| 699 m_context->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT
, GL_RENDERBUFFER, m_depthStencilBuffer); | |
| 700 m_context->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, m_depthStencilBuffer); | |
| 701 } else { | |
| 702 if (m_requestedAttributes.depth) { | |
| 703 if (!m_depthBuffer) | |
| 704 m_depthBuffer = m_context->createRenderbuffer(); | |
| 705 m_context->bindRenderbuffer(GL_RENDERBUFFER, m_depthBuffer); | |
| 706 if (m_multisampleMode == ImplicitResolve) | |
| 707 m_context->renderbufferStorageMultisampleEXT(GL_RENDERBUFFER, m_
sampleCount, GL_DEPTH_COMPONENT16, size.width(), size.height()); | |
| 708 else if (m_multisampleMode == ExplicitResolve) | |
| 709 m_context->renderbufferStorageMultisampleCHROMIUM(GL_RENDERBUFFE
R, m_sampleCount, GL_DEPTH_COMPONENT16, size.width(), size.height()); | |
| 710 else | |
| 711 m_context->renderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONE
NT16, size.width(), size.height()); | |
| 712 m_context->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHME
NT, GL_RENDERBUFFER, m_depthBuffer); | |
| 713 } | |
| 714 if (m_requestedAttributes.stencil) { | |
| 715 if (!m_stencilBuffer) | |
| 716 m_stencilBuffer = m_context->createRenderbuffer(); | |
| 717 m_context->bindRenderbuffer(GL_RENDERBUFFER, m_stencilBuffer); | |
| 718 if (m_multisampleMode == ImplicitResolve) | |
| 719 m_context->renderbufferStorageMultisampleEXT(GL_RENDERBUFFER, m_
sampleCount, GL_STENCIL_INDEX8, size.width(), size.height()); | |
| 720 else if (m_multisampleMode == ExplicitResolve) | |
| 721 m_context->renderbufferStorageMultisampleCHROMIUM(GL_RENDERBUFFE
R, m_sampleCount, GL_STENCIL_INDEX8, size.width(), size.height()); | |
| 722 else | |
| 723 m_context->renderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX
8, size.width(), size.height()); | |
| 724 m_context->framebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACH
MENT, GL_RENDERBUFFER, m_stencilBuffer); | |
| 725 } | |
| 726 } | |
| 727 m_context->bindRenderbuffer(GL_RENDERBUFFER, 0); | |
| 728 } | |
| 729 | |
| 730 | |
| 731 | |
| 732 void DrawingBuffer::clearFramebuffers(GLbitfield clearMask) | |
| 733 { | |
| 734 // We will clear the multisample FBO, but we also need to clear the non-mult
isampled buffer. | |
| 735 if (m_multisampleFBO) { | |
| 736 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_fbo); | |
| 737 m_context->clear(GL_COLOR_BUFFER_BIT); | |
| 738 } | |
| 739 | |
| 740 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_multisampleFBO ? m_multisampleF
BO : m_fbo); | |
| 741 m_context->clear(clearMask); | |
| 742 } | |
| 743 | |
| 744 void DrawingBuffer::setSize(const IntSize& size) | |
| 745 { | |
| 746 if (m_size == size) | |
| 747 return; | |
| 748 | |
| 749 s_currentResourceUsePixels += pixelDelta(size, m_size); | |
| 750 m_size = size; | |
| 751 } | |
| 752 | |
| 753 int DrawingBuffer::pixelDelta(const IntSize& newSize, const IntSize& curSize) | |
| 754 { | |
| 755 return (std::max(0, newSize.width()) * std::max(0, newSize.height())) - (std
::max(0, curSize.width()) * std::max(0, curSize.height())); | |
| 756 } | |
| 757 | |
| 758 IntSize DrawingBuffer::adjustSize(const IntSize& desiredSize, const IntSize& cur
Size, int maxTextureSize) | |
| 759 { | |
| 760 IntSize adjustedSize = desiredSize; | |
| 761 | |
| 762 // Clamp if the desired size is greater than the maximum texture size for th
e device. | |
| 763 if (adjustedSize.height() > maxTextureSize) | |
| 764 adjustedSize.setHeight(maxTextureSize); | |
| 765 | |
| 766 if (adjustedSize.width() > maxTextureSize) | |
| 767 adjustedSize.setWidth(maxTextureSize); | |
| 768 | |
| 769 // Try progressively smaller sizes until we find a size that fits or reach a
scale limit. | |
| 770 int scaleAttempts = 0; | |
| 771 while ((s_currentResourceUsePixels + pixelDelta(adjustedSize, curSize)) > s_
maximumResourceUsePixels) { | |
| 772 scaleAttempts++; | |
| 773 if (scaleAttempts > s_maxScaleAttempts) | |
| 774 return IntSize(); | |
| 775 | |
| 776 adjustedSize.scale(s_resourceAdjustedRatio); | |
| 777 | |
| 778 if (adjustedSize.isEmpty()) | |
| 779 return IntSize(); | |
| 780 } | |
| 781 | |
| 782 return adjustedSize; | |
| 783 } | |
| 784 | |
| 785 IntSize DrawingBuffer::adjustSizeWithContextEviction(const IntSize& size, bool&
evictContext) | |
| 786 { | |
| 787 IntSize adjustedSize = adjustSize(size, m_size, m_maxTextureSize); | |
| 788 if (!adjustedSize.isEmpty()) { | |
| 789 evictContext = false; | |
| 790 return adjustedSize; // Buffer fits without evicting a context. | |
| 791 } | |
| 792 | |
| 793 // Speculatively adjust the pixel budget to see if the buffer would fit shou
ld the oldest context be evicted. | |
| 794 IntSize oldestSize = m_contextEvictionManager->oldestContextSize(); | |
| 795 int pixelDelta = oldestSize.width() * oldestSize.height(); | |
| 796 | |
| 797 s_currentResourceUsePixels -= pixelDelta; | |
| 798 adjustedSize = adjustSize(size, m_size, m_maxTextureSize); | |
| 799 s_currentResourceUsePixels += pixelDelta; | |
| 800 | |
| 801 evictContext = !adjustedSize.isEmpty(); | |
| 802 return adjustedSize; | |
| 803 } | |
| 804 | |
| 805 bool DrawingBuffer::reset(const IntSize& newSize) | |
| 806 { | |
| 807 ASSERT(!newSize.isEmpty()); | |
| 808 IntSize adjustedSize; | |
| 809 bool evictContext = false; | |
| 810 bool isNewContext = m_size.isEmpty(); | |
| 811 if (s_allowContextEvictionOnCreate && isNewContext) | |
| 812 adjustedSize = adjustSizeWithContextEviction(newSize, evictContext); | |
| 813 else | |
| 814 adjustedSize = adjustSize(newSize, m_size, m_maxTextureSize); | |
| 815 | |
| 816 if (adjustedSize.isEmpty()) | |
| 817 return false; | |
| 818 | |
| 819 if (evictContext) | |
| 820 m_contextEvictionManager->forciblyLoseOldestContext("WARNING: WebGL cont
exts have exceeded the maximum allowed backbuffer area. Oldest context will be l
ost."); | |
| 821 | |
| 822 if (adjustedSize != m_size) { | |
| 823 do { | |
| 824 // resize multisample FBO | |
| 825 if (!resizeMultisampleFramebuffer(adjustedSize) || !resizeFramebuffe
r(adjustedSize)) { | |
| 826 adjustedSize.scale(s_resourceAdjustedRatio); | |
| 827 continue; | |
| 828 } | |
| 829 break; | |
| 830 } while (!adjustedSize.isEmpty()); | |
| 831 | |
| 832 setSize(adjustedSize); | |
| 833 | |
| 834 if (adjustedSize.isEmpty()) | |
| 835 return false; | |
| 836 } | |
| 837 | |
| 838 m_context->disable(GL_SCISSOR_TEST); | |
| 839 m_context->clearColor(0, 0, 0, 0); | |
| 840 m_context->colorMask(true, true, true, true); | |
| 841 | |
| 842 GLbitfield clearMask = GL_COLOR_BUFFER_BIT; | |
| 843 if (m_actualAttributes.depth) { | |
| 844 m_context->clearDepth(1.0f); | |
| 845 clearMask |= GL_DEPTH_BUFFER_BIT; | |
| 846 m_context->depthMask(true); | |
| 847 } | |
| 848 if (m_actualAttributes.stencil) { | |
| 849 m_context->clearStencil(0); | |
| 850 clearMask |= GL_STENCIL_BUFFER_BIT; | |
| 851 m_context->stencilMaskSeparate(GL_FRONT, 0xFFFFFFFF); | |
| 852 } | |
| 853 | |
| 854 clearFramebuffers(clearMask); | |
| 855 return true; | |
| 856 } | |
| 857 | |
| 858 void DrawingBuffer::commit(long x, long y, long width, long height) | |
| 859 { | |
| 860 if (width < 0) | |
| 861 width = m_size.width(); | |
| 862 if (height < 0) | |
| 863 height = m_size.height(); | |
| 864 | |
| 865 if (m_multisampleFBO && !m_contentsChangeCommitted) { | |
| 866 m_context->bindFramebuffer(GL_READ_FRAMEBUFFER_ANGLE, m_multisampleFBO); | |
| 867 m_context->bindFramebuffer(GL_DRAW_FRAMEBUFFER_ANGLE, m_fbo); | |
| 868 | |
| 869 if (m_scissorEnabled) | |
| 870 m_context->disable(GL_SCISSOR_TEST); | |
| 871 | |
| 872 // Use NEAREST, because there is no scale performed during the blit. | |
| 873 m_context->blitFramebufferCHROMIUM(x, y, width, height, x, y, width, hei
ght, GL_COLOR_BUFFER_BIT, GL_NEAREST); | |
| 874 | |
| 875 if (m_scissorEnabled) | |
| 876 m_context->enable(GL_SCISSOR_TEST); | |
| 877 } | |
| 878 | |
| 879 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_fbo); | |
| 880 m_contentsChangeCommitted = true; | |
| 881 } | |
| 882 | |
| 883 void DrawingBuffer::restoreFramebufferBinding() | |
| 884 { | |
| 885 if (!m_framebufferBinding) | |
| 886 return; | |
| 887 | |
| 888 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_framebufferBinding); | |
| 889 } | |
| 890 | |
| 891 bool DrawingBuffer::multisample() const | |
| 892 { | |
| 893 return m_multisampleMode != None; | |
| 894 } | |
| 895 | |
| 896 void DrawingBuffer::bind() | |
| 897 { | |
| 898 m_context->bindFramebuffer(GL_FRAMEBUFFER, m_multisampleFBO ? m_multisampleF
BO : m_fbo); | |
| 899 } | |
| 900 | |
| 901 void DrawingBuffer::setPackAlignment(GLint param) | |
| 902 { | |
| 903 m_packAlignment = param; | |
| 904 } | |
| 905 | |
| 906 void DrawingBuffer::paintRenderingResultsToCanvas(ImageBuffer* imageBuffer) | |
| 907 { | |
| 908 paintFramebufferToCanvas(framebuffer(), size().width(), size().height(), !m_
actualAttributes.premultipliedAlpha, imageBuffer); | |
| 909 } | |
| 910 | |
| 911 PassRefPtr<Uint8ClampedArray> DrawingBuffer::paintRenderingResultsToImageData(in
t& width, int& height) | |
| 912 { | |
| 913 if (m_actualAttributes.premultipliedAlpha) | |
| 914 return nullptr; | |
| 915 | |
| 916 width = size().width(); | |
| 917 height = size().height(); | |
| 918 | |
| 919 Checked<int, RecordOverflow> dataSize = 4; | |
| 920 dataSize *= width; | |
| 921 dataSize *= height; | |
| 922 if (dataSize.hasOverflowed()) | |
| 923 return nullptr; | |
| 924 | |
| 925 RefPtr<Uint8ClampedArray> pixels = Uint8ClampedArray::createUninitialized(wi
dth * height * 4); | |
| 926 | |
| 927 m_context->bindFramebuffer(GL_FRAMEBUFFER, framebuffer()); | |
| 928 readBackFramebuffer(pixels->data(), width, height, ReadbackRGBA, WebGLImageC
onversion::AlphaDoNothing); | |
| 929 flipVertically(pixels->data(), width, height); | |
| 930 | |
| 931 return pixels.release(); | |
| 932 } | |
| 933 | |
| 934 void DrawingBuffer::paintFramebufferToCanvas(int framebuffer, int width, int hei
ght, bool premultiplyAlpha, ImageBuffer* imageBuffer) | |
| 935 { | |
| 936 unsigned char* pixels = 0; | |
| 937 | |
| 938 const SkBitmap& canvasBitmap = imageBuffer->bitmap(); | |
| 939 const SkBitmap* readbackBitmap = 0; | |
| 940 ASSERT(canvasBitmap.colorType() == kN32_SkColorType); | |
| 941 if (canvasBitmap.width() == width && canvasBitmap.height() == height) { | |
| 942 // This is the fastest and most common case. We read back | |
| 943 // directly into the canvas's backing store. | |
| 944 readbackBitmap = &canvasBitmap; | |
| 945 m_resizingBitmap.reset(); | |
| 946 } else { | |
| 947 // We need to allocate a temporary bitmap for reading back the | |
| 948 // pixel data. We will then use Skia to rescale this bitmap to | |
| 949 // the size of the canvas's backing store. | |
| 950 if (m_resizingBitmap.width() != width || m_resizingBitmap.height() != he
ight) | |
| 951 m_resizingBitmap.allocN32Pixels(width, height); | |
| 952 readbackBitmap = &m_resizingBitmap; | |
| 953 } | |
| 954 | |
| 955 // Read back the frame buffer. | |
| 956 SkAutoLockPixels bitmapLock(*readbackBitmap); | |
| 957 pixels = static_cast<unsigned char*>(readbackBitmap->getPixels()); | |
| 958 | |
| 959 m_context->bindFramebuffer(GL_FRAMEBUFFER, framebuffer); | |
| 960 readBackFramebuffer(pixels, width, height, ReadbackSkia, premultiplyAlpha ?
WebGLImageConversion::AlphaDoPremultiply : WebGLImageConversion::AlphaDoNothing)
; | |
| 961 flipVertically(pixels, width, height); | |
| 962 | |
| 963 readbackBitmap->notifyPixelsChanged(); | |
| 964 if (m_resizingBitmap.readyToDraw()) { | |
| 965 // We need to draw the resizing bitmap into the canvas's backing store. | |
| 966 SkCanvas canvas(canvasBitmap); | |
| 967 SkRect dst; | |
| 968 dst.set(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(canvasBitmap.w
idth()), SkIntToScalar(canvasBitmap.height())); | |
| 969 canvas.drawBitmapRect(m_resizingBitmap, 0, dst); | |
| 970 } | |
| 971 } | |
| 972 | |
| 973 void DrawingBuffer::readBackFramebuffer(unsigned char* pixels, int width, int he
ight, ReadbackOrder readbackOrder, WebGLImageConversion::AlphaOp op) | |
| 974 { | |
| 975 if (m_packAlignment > 4) | |
| 976 m_context->pixelStorei(GL_PACK_ALIGNMENT, 1); | |
| 977 m_context->readPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels
); | |
| 978 if (m_packAlignment > 4) | |
| 979 m_context->pixelStorei(GL_PACK_ALIGNMENT, m_packAlignment); | |
| 980 | |
| 981 size_t bufferSize = 4 * width * height; | |
| 982 | |
| 983 if (readbackOrder == ReadbackSkia) { | |
| 984 #if (SK_R32_SHIFT == 16) && !SK_B32_SHIFT | |
| 985 // Swizzle red and blue channels to match SkBitmap's byte ordering. | |
| 986 // TODO(kbr): expose GL_BGRA as extension. | |
| 987 for (size_t i = 0; i < bufferSize; i += 4) { | |
| 988 std::swap(pixels[i], pixels[i + 2]); | |
| 989 } | |
| 990 #endif | |
| 991 } | |
| 992 | |
| 993 if (op == WebGLImageConversion::AlphaDoPremultiply) { | |
| 994 for (size_t i = 0; i < bufferSize; i += 4) { | |
| 995 pixels[i + 0] = std::min(255, pixels[i + 0] * pixels[i + 3] / 255); | |
| 996 pixels[i + 1] = std::min(255, pixels[i + 1] * pixels[i + 3] / 255); | |
| 997 pixels[i + 2] = std::min(255, pixels[i + 2] * pixels[i + 3] / 255); | |
| 998 } | |
| 999 } else if (op != WebGLImageConversion::AlphaDoNothing) { | |
| 1000 ASSERT_NOT_REACHED(); | |
| 1001 } | |
| 1002 } | |
| 1003 | |
| 1004 void DrawingBuffer::flipVertically(uint8_t* framebuffer, int width, int height) | |
| 1005 { | |
| 1006 m_scanline.resize(width * 4); | |
| 1007 uint8* scanline = &m_scanline[0]; | |
| 1008 unsigned rowBytes = width * 4; | |
| 1009 unsigned count = height / 2; | |
| 1010 for (unsigned i = 0; i < count; i++) { | |
| 1011 uint8* rowA = framebuffer + i * rowBytes; | |
| 1012 uint8* rowB = framebuffer + (height - i - 1) * rowBytes; | |
| 1013 memcpy(scanline, rowB, rowBytes); | |
| 1014 memcpy(rowB, rowA, rowBytes); | |
| 1015 memcpy(rowA, scanline, rowBytes); | |
| 1016 } | |
| 1017 } | |
| 1018 | |
| 1019 void DrawingBuffer::texImage2DResourceSafe(GLenum target, GLint level, GLenum in
ternalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum
type, GLint unpackAlignment) | |
| 1020 { | |
| 1021 ASSERT(unpackAlignment == 1 || unpackAlignment == 2 || unpackAlignment == 4
|| unpackAlignment == 8); | |
| 1022 m_context->texImage2D(target, level, internalformat, width, height, border,
format, type, 0); | |
| 1023 } | |
| 1024 | |
| 1025 void DrawingBuffer::allocateTextureMemory(TextureInfo* info, const IntSize& size
) | |
| 1026 { | |
| 1027 if (RuntimeEnabledFeatures::webGLImageChromiumEnabled()) { | |
| 1028 deleteChromiumImageForTexture(info); | |
| 1029 | |
| 1030 info->imageId = m_context->createImageCHROMIUM(size.width(), size.height
(), GL_RGBA8_OES, GC3D_IMAGE_SCANOUT_CHROMIUM); | |
| 1031 if (info->imageId) { | |
| 1032 m_context->bindTexImage2DCHROMIUM(GL_TEXTURE_2D, info->imageId); | |
| 1033 return; | |
| 1034 } | |
| 1035 } | |
| 1036 | |
| 1037 texImage2DResourceSafe(GL_TEXTURE_2D, 0, m_internalColorFormat, size.width()
, size.height(), 0, m_colorFormat, GL_UNSIGNED_BYTE); | |
| 1038 } | |
| 1039 | |
| 1040 void DrawingBuffer::deleteChromiumImageForTexture(TextureInfo* info) | |
| 1041 { | |
| 1042 if (info->imageId) { | |
| 1043 m_context->releaseTexImage2DCHROMIUM(GL_TEXTURE_2D, info->imageId); | |
| 1044 m_context->destroyImageCHROMIUM(info->imageId); | |
| 1045 info->imageId = 0; | |
| 1046 } | |
| 1047 } | |
| 1048 | |
| 1049 } // namespace blink | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1229113003:
Remove some unneeded DEPS from //sky (Closed)
Base URL: git@github.com:domokit/mojo.git@master