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| 1 // Copyright 2014 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 "content/common/gpu/image_transport_surface_calayer_mac.h" | |
| 6 | |
| 7 #include <IOSurface/IOSurface.h> | |
| 8 #include <OpenGL/CGLRenderers.h> | |
| 9 #include <OpenGL/CGLIOSurface.h> | |
| 10 | |
| 11 #include "base/command_line.h" | |
| 12 #include "base/mac/sdk_forward_declarations.h" | |
| 13 #include "base/trace_event/trace_event.h" | |
| 14 #include "gpu/config/gpu_info_collector.h" | |
| 15 #include "ui/accelerated_widget_mac/surface_handle_types.h" | |
| 16 #include "ui/base/cocoa/animation_utils.h" | |
| 17 #include "ui/gfx/geometry/dip_util.h" | |
| 18 #include "ui/gfx/geometry/size_conversions.h" | |
| 19 #include "ui/gl/gl_switches.h" | |
| 20 #include "ui/gl/gpu_switching_manager.h" | |
| 21 #include "ui/gl/scoped_api.h" | |
| 22 | |
| 23 namespace { | |
| 24 const size_t kFramesToKeepCAContextAfterDiscard = 2; | |
| 25 const size_t kCanDrawFalsesBeforeSwitchFromAsync = 4; | |
| 26 const base::TimeDelta kMinDeltaToSwitchToAsync = | |
| 27 base::TimeDelta::FromSecondsD(1. / 15.); | |
| 28 | |
| 29 | |
| 30 } // namespace | |
| 31 | |
| 32 @interface ImageTransportCAOpenGLLayer : CAOpenGLLayer { | |
| 33 content::CALayerStorageProvider* storageProvider_; | |
| 34 base::Closure didDrawCallback_; | |
| 35 | |
| 36 // Used to determine if we should use setNeedsDisplay or setAsynchronous to | |
| 37 // animate. If the last swap time happened very recently, then | |
| 38 // setAsynchronous is used (which allows smooth animation, but comes with the | |
| 39 // penalty of the canDrawInCGLContext function waking up the process every | |
| 40 // vsync). | |
| 41 base::TimeTicks lastSynchronousSwapTime_; | |
| 42 | |
| 43 // A counter that is incremented whenever LayerCanDraw returns false. If this | |
| 44 // reaches a threshold, then |layer_| is switched to synchronous drawing to | |
| 45 // save CPU work. | |
| 46 uint32 canDrawReturnedFalseCount_; | |
| 47 | |
| 48 gfx::Size pixelSize_; | |
| 49 } | |
| 50 | |
| 51 - (id)initWithStorageProvider:(content::CALayerStorageProvider*)storageProvider | |
| 52 pixelSize:(gfx::Size)pixelSize | |
| 53 scaleFactor:(float)scaleFactor; | |
| 54 - (void)requestDrawNewFrame; | |
| 55 - (void)drawPendingFrameImmediately; | |
| 56 - (void)resetStorageProvider; | |
| 57 @end | |
| 58 | |
| 59 @implementation ImageTransportCAOpenGLLayer | |
| 60 | |
| 61 - (id)initWithStorageProvider: | |
| 62 (content::CALayerStorageProvider*)storageProvider | |
| 63 pixelSize:(gfx::Size)pixelSize | |
| 64 scaleFactor:(float)scaleFactor { | |
| 65 if (self = [super init]) { | |
| 66 gfx::Size dipSize = gfx::ConvertSizeToDIP(scaleFactor, pixelSize); | |
| 67 [self setContentsScale:scaleFactor]; | |
| 68 [self setFrame:CGRectMake(0, 0, dipSize.width(), dipSize.height())]; | |
| 69 storageProvider_ = storageProvider; | |
| 70 pixelSize_ = pixelSize; | |
| 71 } | |
| 72 return self; | |
| 73 } | |
| 74 | |
| 75 - (void)requestDrawNewFrame { | |
| 76 // This tracing would be more natural to do with a pseudo-thread for each | |
| 77 // layer, rather than a counter. | |
| 78 // http://crbug.com/366300 | |
| 79 // A trace value of 2 indicates that there is a pending swap ack. See | |
| 80 // canDrawInCGLContext for other value meanings. | |
| 81 TRACE_COUNTER_ID1("gpu", "CALayerPendingSwap", self, 2); | |
| 82 | |
| 83 if (![self isAsynchronous]) { | |
| 84 // Switch to asynchronous drawing only if we get two frames in rapid | |
| 85 // succession. | |
| 86 base::TimeTicks this_swap_time = base::TimeTicks::Now(); | |
| 87 base::TimeDelta delta = this_swap_time - lastSynchronousSwapTime_; | |
| 88 if (delta <= kMinDeltaToSwitchToAsync) { | |
| 89 lastSynchronousSwapTime_ = base::TimeTicks(); | |
| 90 [self setAsynchronous:YES]; | |
| 91 } else { | |
| 92 lastSynchronousSwapTime_ = this_swap_time; | |
| 93 [self setNeedsDisplay]; | |
| 94 } | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 - (void)drawPendingFrameImmediately { | |
| 99 DCHECK(storageProvider_->LayerHasPendingDraw()); | |
| 100 if ([self isAsynchronous]) | |
| 101 [self setAsynchronous:NO]; | |
| 102 [self setNeedsDisplay]; | |
| 103 [self displayIfNeeded]; | |
| 104 } | |
| 105 | |
| 106 - (void)resetStorageProvider { | |
| 107 storageProvider_ = NULL; | |
| 108 } | |
| 109 | |
| 110 - (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask { | |
| 111 if (!storageProvider_) | |
| 112 return NULL; | |
| 113 return CGLRetainPixelFormat(CGLGetPixelFormat( | |
| 114 storageProvider_->LayerShareGroupContext())); | |
| 115 } | |
| 116 | |
| 117 - (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat { | |
| 118 if (!storageProvider_) | |
| 119 return NULL; | |
| 120 CGLContextObj context = NULL; | |
| 121 CGLError error = CGLCreateContext( | |
| 122 pixelFormat, storageProvider_->LayerShareGroupContext(), &context); | |
| 123 if (error != kCGLNoError) | |
| 124 LOG(ERROR) << "CGLCreateContext failed with CGL error: " << error; | |
| 125 return context; | |
| 126 } | |
| 127 | |
| 128 - (BOOL)canDrawInCGLContext:(CGLContextObj)glContext | |
| 129 pixelFormat:(CGLPixelFormatObj)pixelFormat | |
| 130 forLayerTime:(CFTimeInterval)timeInterval | |
| 131 displayTime:(const CVTimeStamp*)timeStamp { | |
| 132 TRACE_EVENT0("gpu", "CALayerStorageProvider::LayerCanDraw"); | |
| 133 | |
| 134 if (!storageProvider_) | |
| 135 return NO; | |
| 136 | |
| 137 if (storageProvider_->LayerHasPendingDraw()) { | |
| 138 // If there is a draw pending then increase the signal from 2 to 3, to | |
| 139 // indicate that there is a swap pending, and CoreAnimation has asked to | |
| 140 // draw it. | |
| 141 TRACE_COUNTER_ID1("gpu", "CALayerPendingSwap", self, 3); | |
| 142 | |
| 143 canDrawReturnedFalseCount_ = 0; | |
| 144 return YES; | |
| 145 } else { | |
| 146 // If there is not a draw pending, then give an instantaneous blip up from | |
| 147 // 0 to 1, indicating that CoreAnimation was ready to draw a frame but we | |
| 148 // were not (or didn't have new content to draw). | |
| 149 TRACE_COUNTER_ID1("gpu", "CALayerPendingSwap", self, 1); | |
| 150 TRACE_COUNTER_ID1("gpu", "CALayerPendingSwap", self, 0); | |
| 151 | |
| 152 if ([self isAsynchronous]) { | |
| 153 // If we are in asynchronous mode, we will be getting callbacks at every | |
| 154 // vsync, asking us if we have anything to draw. If we get many of these | |
| 155 // in a row, ask that we stop getting these callback for now, so that we | |
| 156 // don't waste CPU cycles. | |
| 157 if (canDrawReturnedFalseCount_ >= kCanDrawFalsesBeforeSwitchFromAsync) | |
| 158 [self setAsynchronous:NO]; | |
| 159 else | |
| 160 canDrawReturnedFalseCount_ += 1; | |
| 161 } | |
| 162 return NO; | |
| 163 } | |
| 164 } | |
| 165 | |
| 166 - (void)drawInCGLContext:(CGLContextObj)glContext | |
| 167 pixelFormat:(CGLPixelFormatObj)pixelFormat | |
| 168 forLayerTime:(CFTimeInterval)timeInterval | |
| 169 displayTime:(const CVTimeStamp*)timeStamp { | |
| 170 // While in this callback, CoreAnimation has set |glContext| to be current. | |
| 171 // Ensure that the GL calls that we make are made against the native GL API. | |
| 172 gfx::ScopedSetGLToRealGLApi scoped_set_gl_api; | |
| 173 | |
| 174 if (storageProvider_) { | |
| 175 storageProvider_->LayerDoDraw(gfx::Rect(pixelSize_), false); | |
| 176 storageProvider_->LayerUnblockBrowserIfNeeded(); | |
| 177 // A trace value of 0 indicates that there is no longer a pending swap ack. | |
| 178 TRACE_COUNTER_ID1("gpu", "CALayerPendingSwap", self, 0); | |
| 179 } else { | |
| 180 glClearColor(1, 1, 1, 1); | |
| 181 glClear(GL_COLOR_BUFFER_BIT); | |
| 182 } | |
| 183 [super drawInCGLContext:glContext | |
| 184 pixelFormat:pixelFormat | |
| 185 forLayerTime:timeInterval | |
| 186 displayTime:timeStamp]; | |
| 187 } | |
| 188 | |
| 189 @end | |
| 190 | |
| 191 namespace content { | |
| 192 | |
| 193 CALayerStorageProvider::CALayerStorageProvider( | |
| 194 ImageTransportSurfaceFBO* transport_surface) | |
| 195 : transport_surface_(transport_surface), | |
| 196 gpu_vsync_disabled_(base::CommandLine::ForCurrentProcess()->HasSwitch( | |
| 197 switches::kDisableGpuVsync)), | |
| 198 throttling_disabled_(false), | |
| 199 has_pending_ack_(false), | |
| 200 fbo_texture_(0), | |
| 201 fbo_scale_factor_(1), | |
| 202 program_(0), | |
| 203 vertex_shader_(0), | |
| 204 fragment_shader_(0), | |
| 205 position_location_(0), | |
| 206 tex_location_(0), | |
| 207 vertex_buffer_(0), | |
| 208 vertex_array_(0), | |
| 209 recreate_layer_after_gpu_switch_(false), | |
| 210 pending_draw_weak_factory_(this) { | |
| 211 ui::GpuSwitchingManager::GetInstance()->AddObserver(this); | |
| 212 } | |
| 213 | |
| 214 CALayerStorageProvider::~CALayerStorageProvider() { | |
| 215 ui::GpuSwitchingManager::GetInstance()->RemoveObserver(this); | |
| 216 } | |
| 217 | |
| 218 gfx::Size CALayerStorageProvider::GetRoundedSize(gfx::Size size) { | |
| 219 return size; | |
| 220 } | |
| 221 | |
| 222 bool CALayerStorageProvider::AllocateColorBufferStorage( | |
| 223 CGLContextObj context, const base::Closure& context_dirtied_callback, | |
| 224 GLuint texture, gfx::Size pixel_size, float scale_factor) { | |
| 225 // Allocate an ordinary OpenGL texture to back the FBO. | |
| 226 GLenum error; | |
| 227 while ((error = glGetError()) != GL_NO_ERROR) { | |
| 228 LOG(ERROR) << "OpenGL error hit but ignored before allocating buffer " | |
| 229 << "storage: " << error; | |
| 230 } | |
| 231 | |
| 232 if (gfx::GetGLImplementation() == | |
| 233 gfx::kGLImplementationDesktopGLCoreProfile) { | |
| 234 glTexImage2D(GL_TEXTURE_2D, | |
| 235 0, | |
| 236 GL_RGBA, | |
| 237 pixel_size.width(), | |
| 238 pixel_size.height(), | |
| 239 0, | |
| 240 GL_RGBA, | |
| 241 GL_UNSIGNED_BYTE, | |
| 242 NULL); | |
| 243 glFlush(); | |
| 244 | |
| 245 if (!vertex_shader_) { | |
| 246 const char* source = | |
| 247 "#version 150\n" | |
| 248 "in vec4 position;\n" | |
| 249 "out vec2 texcoord;\n" | |
| 250 "void main() {\n" | |
| 251 " texcoord = vec2(position.x, position.y);\n" | |
| 252 " gl_Position = vec4(2*position.x-1, 2*position.y-1,\n" | |
| 253 " position.z, position.w);\n" | |
| 254 "}\n"; | |
| 255 vertex_shader_ = glCreateShader(GL_VERTEX_SHADER); | |
| 256 glShaderSource(vertex_shader_, 1, &source, NULL); | |
| 257 glCompileShader(vertex_shader_); | |
| 258 #if DCHECK_IS_ON() | |
| 259 GLint status = GL_FALSE; | |
| 260 glGetShaderiv(vertex_shader_, GL_COMPILE_STATUS, &status); | |
| 261 DCHECK(status == GL_TRUE); | |
| 262 #endif | |
| 263 } | |
| 264 if (!fragment_shader_) { | |
| 265 const char* source = | |
| 266 "#version 150\n" | |
| 267 "uniform sampler2D tex;\n" | |
| 268 "in vec2 texcoord;\n" | |
| 269 "out vec4 frag_color;\n" | |
| 270 "void main() {\n" | |
| 271 " frag_color = texture(tex, texcoord);\n" | |
| 272 "}\n"; | |
| 273 fragment_shader_ = glCreateShader(GL_FRAGMENT_SHADER); | |
| 274 glShaderSource(fragment_shader_, 1, &source, NULL); | |
| 275 glCompileShader(fragment_shader_); | |
| 276 #if DCHECK_IS_ON() | |
| 277 GLint status = GL_FALSE; | |
| 278 glGetShaderiv(fragment_shader_, GL_COMPILE_STATUS, &status); | |
| 279 DCHECK(status == GL_TRUE); | |
| 280 #endif | |
| 281 } | |
| 282 if (!program_) { | |
| 283 program_ = glCreateProgram(); | |
| 284 glAttachShader(program_, vertex_shader_); | |
| 285 glAttachShader(program_, fragment_shader_); | |
| 286 glBindFragDataLocation(program_, 0, "frag_color"); | |
| 287 glLinkProgram(program_); | |
| 288 #if DCHECK_IS_ON() | |
| 289 GLint status = GL_FALSE; | |
| 290 glGetProgramiv(program_, GL_LINK_STATUS, &status); | |
| 291 DCHECK(status == GL_TRUE); | |
| 292 #endif | |
| 293 position_location_ = glGetAttribLocation(program_, "position"); | |
| 294 tex_location_ = glGetUniformLocation(program_, "tex"); | |
| 295 } | |
| 296 if (!vertex_buffer_) { | |
| 297 GLfloat vertex_data[24] = { | |
| 298 0, 0, 0, 1, | |
| 299 1, 0, 0, 1, | |
| 300 1, 1, 0, 1, | |
| 301 1, 1, 0, 1, | |
| 302 0, 1, 0, 1, | |
| 303 0, 0, 0, 1, | |
| 304 }; | |
| 305 glGenBuffersARB(1, &vertex_buffer_); | |
| 306 // If the allocation path used GLContext::RestoreStateIfDirtiedExternally | |
| 307 // as the draw path does, this manual state restoration would not be | |
| 308 // necessary. | |
| 309 GLint bound_buffer = 0; | |
| 310 glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &bound_buffer); | |
| 311 glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer_); | |
| 312 glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_data), | |
| 313 vertex_data, GL_STATIC_DRAW); | |
| 314 glBindBuffer(GL_ARRAY_BUFFER, bound_buffer); | |
| 315 } | |
| 316 if (!vertex_array_) { | |
| 317 // If the allocation path used GLContext::RestoreStateIfDirtiedExternally | |
| 318 // as the draw path does, this manual state restoration would not be | |
| 319 // necessary. | |
| 320 GLint bound_vao = 0; | |
| 321 glGetIntegerv(GL_VERTEX_ARRAY_BINDING_OES, &bound_vao); | |
| 322 glGenVertexArraysOES(1, &vertex_array_); | |
| 323 glBindVertexArrayOES(vertex_array_); | |
| 324 { | |
| 325 glEnableVertexAttribArray(position_location_); | |
| 326 GLint bound_buffer = 0; | |
| 327 glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &bound_buffer); | |
| 328 glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer_); | |
| 329 glVertexAttribPointer(position_location_, 4, GL_FLOAT, GL_FALSE, 0, 0); | |
| 330 glBindBuffer(GL_ARRAY_BUFFER, bound_buffer); | |
| 331 } | |
| 332 glBindVertexArrayOES(bound_vao); | |
| 333 } | |
| 334 } else { | |
| 335 glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, | |
| 336 0, | |
| 337 GL_RGBA, | |
| 338 pixel_size.width(), | |
| 339 pixel_size.height(), | |
| 340 0, | |
| 341 GL_RGBA, | |
| 342 GL_UNSIGNED_BYTE, | |
| 343 NULL); | |
| 344 glFlush(); | |
| 345 } | |
| 346 | |
| 347 bool hit_error = false; | |
| 348 while ((error = glGetError()) != GL_NO_ERROR) { | |
| 349 LOG(ERROR) << "OpenGL error hit while trying to allocate buffer storage: " | |
| 350 << error; | |
| 351 hit_error = true; | |
| 352 } | |
| 353 if (hit_error) | |
| 354 return false; | |
| 355 | |
| 356 // Set the parameters that will be used to allocate the CALayer to draw the | |
| 357 // texture into. | |
| 358 share_group_context_.reset(CGLRetainContext(context)); | |
| 359 share_group_context_dirtied_callback_ = context_dirtied_callback; | |
| 360 fbo_texture_ = texture; | |
| 361 fbo_pixel_size_ = pixel_size; | |
| 362 fbo_scale_factor_ = scale_factor; | |
| 363 return true; | |
| 364 } | |
| 365 | |
| 366 void CALayerStorageProvider::FreeColorBufferStorage() { | |
| 367 if (gfx::GetGLImplementation() == | |
| 368 gfx::kGLImplementationDesktopGLCoreProfile) { | |
| 369 if (vertex_shader_) | |
| 370 glDeleteShader(vertex_shader_); | |
| 371 if (fragment_shader_) | |
| 372 glDeleteShader(fragment_shader_); | |
| 373 if (program_) | |
| 374 glDeleteProgram(program_); | |
| 375 if (vertex_buffer_) | |
| 376 glDeleteBuffersARB(1, &vertex_buffer_); | |
| 377 if (vertex_array_) | |
| 378 glDeleteVertexArraysOES(1, &vertex_array_); | |
| 379 vertex_shader_ = 0; | |
| 380 fragment_shader_ = 0; | |
| 381 program_ = 0; | |
| 382 vertex_buffer_ = 0; | |
| 383 vertex_array_ = 0; | |
| 384 } | |
| 385 | |
| 386 // Note that |context_| still holds a reference to |layer_|, and will until | |
| 387 // a new frame is swapped in. | |
| 388 ResetLayer(); | |
| 389 | |
| 390 share_group_context_.reset(); | |
| 391 share_group_context_dirtied_callback_ = base::Closure(); | |
| 392 fbo_texture_ = 0; | |
| 393 fbo_pixel_size_ = gfx::Size(); | |
| 394 } | |
| 395 | |
| 396 void CALayerStorageProvider::FrameSizeChanged(const gfx::Size& pixel_size, | |
| 397 float scale_factor) { | |
| 398 DCHECK_EQ(fbo_pixel_size_.ToString(), pixel_size.ToString()); | |
| 399 DCHECK_EQ(fbo_scale_factor_, scale_factor); | |
| 400 } | |
| 401 | |
| 402 void CALayerStorageProvider::SwapBuffers(const gfx::Rect& dirty_rect) { | |
| 403 TRACE_EVENT0("gpu", "CALayerStorageProvider::SwapBuffers"); | |
| 404 DCHECK(!has_pending_ack_); | |
| 405 | |
| 406 // Recreate the CALayer on the new GPU if a GPU switch has occurred. Note | |
| 407 // that the CAContext will retain a reference to the old CALayer until the | |
| 408 // call to -[CAContext setLayer:] replaces the old CALayer with the new one. | |
| 409 if (recreate_layer_after_gpu_switch_) { | |
| 410 ResetLayer(); | |
| 411 recreate_layer_after_gpu_switch_ = false; | |
| 412 } | |
| 413 | |
| 414 // Set the pending draw flag only after potentially destroying the old layer | |
| 415 // (otherwise destroying it will un-set the flag). | |
| 416 has_pending_ack_ = true; | |
| 417 | |
| 418 // Allocate a CAContext to use to transport the CALayer to the browser | |
| 419 // process, if needed. | |
| 420 if (!context_) { | |
| 421 base::scoped_nsobject<NSDictionary> dict([[NSDictionary alloc] init]); | |
| 422 CGSConnectionID connection_id = CGSMainConnectionID(); | |
| 423 context_.reset([CAContext contextWithCGSConnection:connection_id | |
| 424 options:dict]); | |
| 425 [context_ retain]; | |
| 426 } | |
| 427 | |
| 428 // Create the appropriate CALayer (if needed) and request that it draw. | |
| 429 bool should_draw_immediately = gpu_vsync_disabled_ || throttling_disabled_; | |
| 430 CreateLayerAndRequestDraw(should_draw_immediately, dirty_rect); | |
| 431 | |
| 432 // CoreAnimation may not call the function to un-block the browser in a | |
| 433 // timely manner (or ever). Post a task to force the draw and un-block | |
| 434 // the browser (at the next cycle through the run-loop if drawing is to | |
| 435 // be immediate, and at a timeout of 1/6th of a second otherwise). | |
| 436 if (has_pending_ack_) { | |
| 437 base::MessageLoop::current()->PostDelayedTask( | |
| 438 FROM_HERE, | |
| 439 base::Bind(&CALayerStorageProvider::DrawImmediatelyAndUnblockBrowser, | |
| 440 pending_draw_weak_factory_.GetWeakPtr()), | |
| 441 should_draw_immediately ? base::TimeDelta() : | |
| 442 base::TimeDelta::FromSeconds(1) / 6); | |
| 443 } | |
| 444 } | |
| 445 | |
| 446 void CALayerStorageProvider::CreateLayerAndRequestDraw( | |
| 447 bool should_draw_immediately, const gfx::Rect& dirty_rect) { | |
| 448 if (!ca_opengl_layer_) { | |
| 449 ca_opengl_layer_.reset([[ImageTransportCAOpenGLLayer alloc] | |
| 450 initWithStorageProvider:this | |
| 451 pixelSize:fbo_pixel_size_ | |
| 452 scaleFactor:fbo_scale_factor_]); | |
| 453 } | |
| 454 | |
| 455 // -[CAOpenGLLayer drawInCGLContext] won't get called until we're in the | |
| 456 // visible layer hierarchy, so call setLayer: immediately, to make this | |
| 457 // happen. | |
| 458 [context_ setLayer:ca_opengl_layer_]; | |
| 459 | |
| 460 // Tell CoreAnimation to draw our frame. Note that sometimes, calling | |
| 461 // -[CAContext setLayer:] will result in the layer getting an immediate | |
| 462 // draw. If that happend, we're done. | |
| 463 if (!should_draw_immediately && has_pending_ack_) { | |
| 464 [ca_opengl_layer_ requestDrawNewFrame]; | |
| 465 } | |
| 466 } | |
| 467 | |
| 468 void CALayerStorageProvider::DrawImmediatelyAndUnblockBrowser() { | |
| 469 DCHECK(has_pending_ack_); | |
| 470 | |
| 471 if (ca_opengl_layer_) { | |
| 472 // Beware that sometimes, the setNeedsDisplay+displayIfNeeded pairs have no | |
| 473 // effect. This can happen if the NSView that this layer is attached to | |
| 474 // isn't in the window hierarchy (e.g, tab capture of a backgrounded tab). | |
| 475 // In this case, the frame will never be seen, so drop it. | |
| 476 [ca_opengl_layer_ drawPendingFrameImmediately]; | |
| 477 } | |
| 478 | |
| 479 UnblockBrowserIfNeeded(); | |
| 480 } | |
| 481 | |
| 482 void CALayerStorageProvider::WillWriteToBackbuffer() { | |
| 483 // The browser should always throttle itself so that there are no pending | |
| 484 // draws when the output surface is written to, but in the event of things | |
| 485 // like context lost, or changing context, this will not be true. If there | |
| 486 // exists a pending draw, flush it immediately to maintain a consistent | |
| 487 // state. | |
| 488 if (has_pending_ack_) | |
| 489 DrawImmediatelyAndUnblockBrowser(); | |
| 490 } | |
| 491 | |
| 492 void CALayerStorageProvider::DiscardBackbuffer() { | |
| 493 // If this surface's backbuffer is discarded, it is because this surface has | |
| 494 // been made non-visible. Ensure that the previous contents are not briefly | |
| 495 // flashed when this is made visible by creating a new CALayer and CAContext | |
| 496 // at the next swap. | |
| 497 ResetLayer(); | |
| 498 | |
| 499 // If we remove all references to the CAContext in this process, it will be | |
| 500 // blanked-out in the browser process (even if the browser process is inside | |
| 501 // a disable screen updates block). Ensure that the context is kept around | |
| 502 // until a fixed number of frames (determined empirically) have been acked. | |
| 503 // http://crbug.com/425819 | |
| 504 while (previously_discarded_contexts_.size() < | |
| 505 kFramesToKeepCAContextAfterDiscard) { | |
| 506 previously_discarded_contexts_.push_back( | |
| 507 base::scoped_nsobject<CAContext>()); | |
| 508 } | |
| 509 previously_discarded_contexts_.push_back(context_); | |
| 510 | |
| 511 context_.reset(); | |
| 512 } | |
| 513 | |
| 514 void CALayerStorageProvider::SwapBuffersAckedByBrowser( | |
| 515 bool disable_throttling) { | |
| 516 TRACE_EVENT0("gpu", "CALayerStorageProvider::SwapBuffersAckedByBrowser"); | |
| 517 throttling_disabled_ = disable_throttling; | |
| 518 if (!previously_discarded_contexts_.empty()) | |
| 519 previously_discarded_contexts_.pop_front(); | |
| 520 } | |
| 521 | |
| 522 CGLContextObj CALayerStorageProvider::LayerShareGroupContext() { | |
| 523 return share_group_context_; | |
| 524 } | |
| 525 | |
| 526 base::Closure CALayerStorageProvider::LayerShareGroupContextDirtiedCallback() { | |
| 527 return share_group_context_dirtied_callback_; | |
| 528 } | |
| 529 | |
| 530 void CALayerStorageProvider::LayerDoDraw( | |
| 531 const gfx::Rect& dirty_rect, bool flipped) { | |
| 532 TRACE_EVENT0("gpu", "CALayerStorageProvider::LayerDoDraw"); | |
| 533 if (gfx::GetGLImplementation() == | |
| 534 gfx::kGLImplementationDesktopGLCoreProfile) { | |
| 535 glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); | |
| 536 glClearColor(1, 0, 1, 1); | |
| 537 glClear(GL_COLOR_BUFFER_BIT); | |
| 538 glDisable(GL_BLEND); | |
| 539 glDisable(GL_CULL_FACE); | |
| 540 glDisable(GL_DEPTH_TEST); | |
| 541 glDisable(GL_STENCIL_TEST); | |
| 542 glDisable(GL_SCISSOR_TEST); | |
| 543 | |
| 544 DCHECK(glIsProgram(program_)); | |
| 545 glUseProgram(program_); | |
| 546 glBindVertexArrayOES(vertex_array_); | |
| 547 | |
| 548 glActiveTexture(GL_TEXTURE0); | |
| 549 glBindTexture(GL_TEXTURE_2D, fbo_texture_); | |
| 550 glUniform1i(tex_location_, 0); | |
| 551 | |
| 552 glDisable(GL_CULL_FACE); | |
| 553 glDrawArrays(GL_TRIANGLES, 0, 6); | |
| 554 glBindVertexArrayOES(0); | |
| 555 glUseProgram(0); | |
| 556 } else { | |
| 557 GLint viewport[4] = {0, 0, 0, 0}; | |
| 558 glGetIntegerv(GL_VIEWPORT, viewport); | |
| 559 gfx::Size viewport_size(viewport[2], viewport[3]); | |
| 560 | |
| 561 // Set the coordinate system to be one-to-one with pixels. | |
| 562 glMatrixMode(GL_PROJECTION); | |
| 563 glLoadIdentity(); | |
| 564 if (flipped) | |
| 565 glOrtho(0, viewport_size.width(), viewport_size.height(), 0, -1, 1); | |
| 566 else | |
| 567 glOrtho(0, viewport_size.width(), 0, viewport_size.height(), -1, 1); | |
| 568 glMatrixMode(GL_MODELVIEW); | |
| 569 glLoadIdentity(); | |
| 570 | |
| 571 // Reset drawing state and draw a fullscreen quad. | |
| 572 glUseProgram(0); | |
| 573 glDisable(GL_BLEND); | |
| 574 glDisable(GL_CULL_FACE); | |
| 575 glDisable(GL_DEPTH_TEST); | |
| 576 glDisable(GL_STENCIL_TEST); | |
| 577 glDisable(GL_SCISSOR_TEST); | |
| 578 glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); | |
| 579 glColor4f(1, 1, 1, 1); | |
| 580 glActiveTexture(GL_TEXTURE0); | |
| 581 glEnable(GL_TEXTURE_RECTANGLE_ARB); | |
| 582 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, fbo_texture_); | |
| 583 glBegin(GL_QUADS); | |
| 584 { | |
| 585 glTexCoord2f(dirty_rect.x(), dirty_rect.y()); | |
| 586 glVertex2f(dirty_rect.x(), dirty_rect.y()); | |
| 587 | |
| 588 glTexCoord2f(dirty_rect.x(), dirty_rect.bottom()); | |
| 589 glVertex2f(dirty_rect.x(), dirty_rect.bottom()); | |
| 590 | |
| 591 glTexCoord2f(dirty_rect.right(), dirty_rect.bottom()); | |
| 592 glVertex2f(dirty_rect.right(), dirty_rect.bottom()); | |
| 593 | |
| 594 glTexCoord2f(dirty_rect.right(), dirty_rect.y()); | |
| 595 glVertex2f(dirty_rect.right(), dirty_rect.y()); | |
| 596 } | |
| 597 glEnd(); | |
| 598 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0); | |
| 599 glDisable(GL_TEXTURE_RECTANGLE_ARB); | |
| 600 } | |
| 601 | |
| 602 GLint current_renderer_id = 0; | |
| 603 if (CGLGetParameter(CGLGetCurrentContext(), | |
| 604 kCGLCPCurrentRendererID, | |
| 605 ¤t_renderer_id) == kCGLNoError) { | |
| 606 current_renderer_id &= kCGLRendererIDMatchingMask; | |
| 607 transport_surface_->SetRendererID(current_renderer_id); | |
| 608 } | |
| 609 | |
| 610 GLenum error; | |
| 611 while ((error = glGetError()) != GL_NO_ERROR) { | |
| 612 LOG(ERROR) << "OpenGL error hit while drawing frame: " << error; | |
| 613 } | |
| 614 } | |
| 615 | |
| 616 void CALayerStorageProvider::LayerUnblockBrowserIfNeeded() { | |
| 617 UnblockBrowserIfNeeded(); | |
| 618 } | |
| 619 | |
| 620 bool CALayerStorageProvider::LayerHasPendingDraw() const { | |
| 621 return has_pending_ack_; | |
| 622 } | |
| 623 | |
| 624 void CALayerStorageProvider::OnGpuSwitched() { | |
| 625 recreate_layer_after_gpu_switch_ = true; | |
| 626 } | |
| 627 | |
| 628 void CALayerStorageProvider::UnblockBrowserIfNeeded() { | |
| 629 if (!has_pending_ack_) | |
| 630 return; | |
| 631 pending_draw_weak_factory_.InvalidateWeakPtrs(); | |
| 632 has_pending_ack_ = false; | |
| 633 transport_surface_->SendSwapBuffers( | |
| 634 ui::SurfaceHandleFromCAContextID([context_ contextId]), | |
| 635 fbo_pixel_size_, | |
| 636 fbo_scale_factor_); | |
| 637 } | |
| 638 | |
| 639 void CALayerStorageProvider::ResetLayer() { | |
| 640 if (ca_opengl_layer_) { | |
| 641 [ca_opengl_layer_ resetStorageProvider]; | |
| 642 // If we are providing back-pressure by waiting for a draw, that draw will | |
| 643 // now never come, so release the pressure now. | |
| 644 UnblockBrowserIfNeeded(); | |
| 645 ca_opengl_layer_.reset(); | |
| 646 } | |
| 647 } | |
| 648 | |
| 649 } // namespace content | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1416363002:
Mac: Always use surfaceless mode (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master