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| 1 // Copyright (c) 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 "remoting/host/capturer.h" | |
| 6 | |
| 7 #include <ApplicationServices/ApplicationServices.h> | |
| 8 #include <Cocoa/Cocoa.h> | |
| 9 #include <dlfcn.h> | |
| 10 #include <IOKit/pwr_mgt/IOPMLib.h> | |
| 11 #include <OpenGL/CGLMacro.h> | |
| 12 #include <OpenGL/OpenGL.h> | |
| 13 #include <stddef.h> | |
| 14 | |
| 15 #include "base/logging.h" | |
| 16 #include "base/mac/mac_util.h" | |
| 17 #include "base/mac/scoped_cftyperef.h" | |
| 18 #include "base/memory/scoped_ptr.h" | |
| 19 #include "base/synchronization/waitable_event.h" | |
| 20 #include "base/time.h" | |
| 21 #include "remoting/base/capture_data.h" | |
| 22 #include "remoting/base/util.h" | |
| 23 #include "remoting/host/capturer_helper.h" | |
| 24 #include "remoting/proto/control.pb.h" | |
| 25 | |
| 26 namespace remoting { | |
| 27 | |
| 28 namespace { | |
| 29 | |
| 30 SkIRect CGRectToSkIRect(const CGRect& rect) { | |
| 31 SkIRect sk_rect = { | |
| 32 SkScalarRound(rect.origin.x), | |
| 33 SkScalarRound(rect.origin.y), | |
| 34 SkScalarRound(rect.origin.x + rect.size.width), | |
| 35 SkScalarRound(rect.origin.y + rect.size.height) | |
| 36 }; | |
| 37 return sk_rect; | |
| 38 } | |
| 39 | |
| 40 #if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_5) | |
| 41 // Possibly remove CapturerMac::CgBlitPreLion as well depending on performance | |
| 42 // of CapturerMac::CgBlitPostLion on 10.6. | |
| 43 #error No longer need to import CGDisplayCreateImage. | |
| 44 #else | |
| 45 // Declared here because CGDisplayCreateImage does not exist in the 10.5 SDK, | |
| 46 // which we are currently compiling against, and it is required on 10.7 to do | |
| 47 // screen capture. | |
| 48 typedef CGImageRef (*CGDisplayCreateImageFunc)(CGDirectDisplayID displayID); | |
| 49 #endif | |
| 50 | |
| 51 // The amount of time allowed for displays to reconfigure. | |
| 52 const int64 kDisplayReconfigurationTimeoutInSeconds = 10; | |
| 53 | |
| 54 class scoped_pixel_buffer_object { | |
| 55 public: | |
| 56 scoped_pixel_buffer_object(); | |
| 57 ~scoped_pixel_buffer_object(); | |
| 58 | |
| 59 bool Init(CGLContextObj cgl_context, int size_in_bytes); | |
| 60 void Release(); | |
| 61 | |
| 62 GLuint get() const { return pixel_buffer_object_; } | |
| 63 | |
| 64 private: | |
| 65 CGLContextObj cgl_context_; | |
| 66 GLuint pixel_buffer_object_; | |
| 67 | |
| 68 DISALLOW_COPY_AND_ASSIGN(scoped_pixel_buffer_object); | |
| 69 }; | |
| 70 | |
| 71 scoped_pixel_buffer_object::scoped_pixel_buffer_object() | |
| 72 : cgl_context_(NULL), | |
| 73 pixel_buffer_object_(0) { | |
| 74 } | |
| 75 | |
| 76 scoped_pixel_buffer_object::~scoped_pixel_buffer_object() { | |
| 77 Release(); | |
| 78 } | |
| 79 | |
| 80 bool scoped_pixel_buffer_object::Init(CGLContextObj cgl_context, | |
| 81 int size_in_bytes) { | |
| 82 // The PBO path is only done on 10.6 (SnowLeopard) and above due to | |
| 83 // a driver issue that was found on 10.5 | |
| 84 // (specifically on a NVIDIA GeForce 7300 GT). | |
| 85 // http://crbug.com/87283 | |
| 86 if (base::mac::IsOSLeopardOrEarlier()) { | |
| 87 return false; | |
| 88 } | |
| 89 cgl_context_ = cgl_context; | |
| 90 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 91 glGenBuffersARB(1, &pixel_buffer_object_); | |
| 92 if (glGetError() == GL_NO_ERROR) { | |
| 93 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pixel_buffer_object_); | |
| 94 glBufferDataARB(GL_PIXEL_PACK_BUFFER_ARB, size_in_bytes, NULL, | |
| 95 GL_STREAM_READ_ARB); | |
| 96 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, 0); | |
| 97 if (glGetError() != GL_NO_ERROR) { | |
| 98 Release(); | |
| 99 } | |
| 100 } else { | |
| 101 cgl_context_ = NULL; | |
| 102 pixel_buffer_object_ = 0; | |
| 103 } | |
| 104 return pixel_buffer_object_ != 0; | |
| 105 } | |
| 106 | |
| 107 void scoped_pixel_buffer_object::Release() { | |
| 108 if (pixel_buffer_object_) { | |
| 109 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 110 glDeleteBuffersARB(1, &pixel_buffer_object_); | |
| 111 cgl_context_ = NULL; | |
| 112 pixel_buffer_object_ = 0; | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 // A class representing a full-frame pixel buffer. | |
| 117 class VideoFrameBuffer { | |
| 118 public: | |
| 119 VideoFrameBuffer() : bytes_per_row_(0), needs_update_(true) { } | |
| 120 | |
| 121 // If the buffer is marked as needing to be updated (for example after the | |
| 122 // screen mode changes) and is the wrong size, then release the old buffer | |
| 123 // and create a new one. | |
| 124 void Update() { | |
| 125 if (needs_update_) { | |
| 126 needs_update_ = false; | |
| 127 CGDirectDisplayID mainDevice = CGMainDisplayID(); | |
| 128 int width = CGDisplayPixelsWide(mainDevice); | |
| 129 int height = CGDisplayPixelsHigh(mainDevice); | |
| 130 if (width != size_.width() || height != size_.height()) { | |
| 131 size_.set(width, height); | |
| 132 bytes_per_row_ = width * sizeof(uint32_t); | |
| 133 size_t buffer_size = width * height * sizeof(uint32_t); | |
| 134 ptr_.reset(new uint8[buffer_size]); | |
| 135 } | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 SkISize size() const { return size_; } | |
| 140 int bytes_per_row() const { return bytes_per_row_; } | |
| 141 uint8* ptr() const { return ptr_.get(); } | |
| 142 | |
| 143 void set_needs_update() { needs_update_ = true; } | |
| 144 | |
| 145 private: | |
| 146 SkISize size_; | |
| 147 int bytes_per_row_; | |
| 148 scoped_array<uint8> ptr_; | |
| 149 bool needs_update_; | |
| 150 | |
| 151 DISALLOW_COPY_AND_ASSIGN(VideoFrameBuffer); | |
| 152 }; | |
| 153 | |
| 154 // A class to perform capturing for mac. | |
| 155 class CapturerMac : public Capturer { | |
| 156 public: | |
| 157 CapturerMac(); | |
| 158 virtual ~CapturerMac(); | |
| 159 | |
| 160 bool Init(); | |
| 161 | |
| 162 // Capturer interface. | |
| 163 virtual void Start(const CursorShapeChangedCallback& callback) OVERRIDE; | |
| 164 virtual void Stop() OVERRIDE; | |
| 165 virtual void ScreenConfigurationChanged() OVERRIDE; | |
| 166 virtual media::VideoFrame::Format pixel_format() const OVERRIDE; | |
| 167 virtual void ClearInvalidRegion() OVERRIDE; | |
| 168 virtual void InvalidateRegion(const SkRegion& invalid_region) OVERRIDE; | |
| 169 virtual void InvalidateScreen(const SkISize& size) OVERRIDE; | |
| 170 virtual void InvalidateFullScreen() OVERRIDE; | |
| 171 virtual void CaptureInvalidRegion( | |
| 172 const CaptureCompletedCallback& callback) OVERRIDE; | |
| 173 virtual const SkISize& size_most_recent() const OVERRIDE; | |
| 174 | |
| 175 private: | |
| 176 void CaptureCursor(); | |
| 177 | |
| 178 void GlBlitFast(const VideoFrameBuffer& buffer, const SkRegion& region); | |
| 179 void GlBlitSlow(const VideoFrameBuffer& buffer); | |
| 180 void CgBlitPreLion(const VideoFrameBuffer& buffer, const SkRegion& region); | |
| 181 void CgBlitPostLion(const VideoFrameBuffer& buffer, const SkRegion& region); | |
| 182 void CaptureRegion(const SkRegion& region, | |
| 183 const CaptureCompletedCallback& callback); | |
| 184 | |
| 185 void ScreenRefresh(CGRectCount count, const CGRect *rect_array); | |
| 186 void ScreenUpdateMove(CGScreenUpdateMoveDelta delta, | |
| 187 size_t count, | |
| 188 const CGRect *rect_array); | |
| 189 void DisplaysReconfigured(CGDirectDisplayID display, | |
| 190 CGDisplayChangeSummaryFlags flags); | |
| 191 static void ScreenRefreshCallback(CGRectCount count, | |
| 192 const CGRect *rect_array, | |
| 193 void *user_parameter); | |
| 194 static void ScreenUpdateMoveCallback(CGScreenUpdateMoveDelta delta, | |
| 195 size_t count, | |
| 196 const CGRect *rect_array, | |
| 197 void *user_parameter); | |
| 198 static void DisplaysReconfiguredCallback(CGDirectDisplayID display, | |
| 199 CGDisplayChangeSummaryFlags flags, | |
| 200 void *user_parameter); | |
| 201 | |
| 202 void ReleaseBuffers(); | |
| 203 | |
| 204 CGLContextObj cgl_context_; | |
| 205 static const int kNumBuffers = 2; | |
| 206 scoped_pixel_buffer_object pixel_buffer_object_; | |
| 207 VideoFrameBuffer buffers_[kNumBuffers]; | |
| 208 | |
| 209 // A thread-safe list of invalid rectangles, and the size of the most | |
| 210 // recently captured screen. | |
| 211 CapturerHelper helper_; | |
| 212 | |
| 213 // Callback notified whenever the cursor shape is changed. | |
| 214 CursorShapeChangedCallback cursor_shape_changed_callback_; | |
| 215 | |
| 216 // Image of the last cursor that we sent to the client. | |
| 217 base::mac::ScopedCFTypeRef<CGImageRef> current_cursor_; | |
| 218 | |
| 219 // The current buffer with valid data for reading. | |
| 220 int current_buffer_; | |
| 221 | |
| 222 // The previous buffer into which we captured, or NULL for the first capture | |
| 223 // for a particular screen resolution. | |
| 224 uint8* last_buffer_; | |
| 225 | |
| 226 // Contains an invalid region from the previous capture. | |
| 227 SkRegion last_invalid_region_; | |
| 228 | |
| 229 // Format of pixels returned in buffer. | |
| 230 media::VideoFrame::Format pixel_format_; | |
| 231 | |
| 232 // Acts as a critical section around our display configuration data | |
| 233 // structures. Specifically cgl_context_ and pixel_buffer_object_. | |
| 234 base::WaitableEvent display_configuration_capture_event_; | |
| 235 | |
| 236 // Will be non-null on lion. | |
| 237 CGDisplayCreateImageFunc display_create_image_func_; | |
| 238 | |
| 239 // Power management assertion to prevent the screen from sleeping. | |
| 240 IOPMAssertionID power_assertion_id_display_; | |
| 241 | |
| 242 // Power management assertion to indicate that the user is active. | |
| 243 IOPMAssertionID power_assertion_id_user_; | |
| 244 | |
| 245 DISALLOW_COPY_AND_ASSIGN(CapturerMac); | |
| 246 }; | |
| 247 | |
| 248 CapturerMac::CapturerMac() | |
| 249 : cgl_context_(NULL), | |
| 250 current_buffer_(0), | |
| 251 last_buffer_(NULL), | |
| 252 pixel_format_(media::VideoFrame::RGB32), | |
| 253 display_configuration_capture_event_(false, true), | |
| 254 display_create_image_func_(NULL), | |
| 255 power_assertion_id_display_(kIOPMNullAssertionID), | |
| 256 power_assertion_id_user_(kIOPMNullAssertionID) { | |
| 257 } | |
| 258 | |
| 259 CapturerMac::~CapturerMac() { | |
| 260 ReleaseBuffers(); | |
| 261 CGUnregisterScreenRefreshCallback(CapturerMac::ScreenRefreshCallback, this); | |
| 262 CGScreenUnregisterMoveCallback(CapturerMac::ScreenUpdateMoveCallback, this); | |
| 263 CGError err = CGDisplayRemoveReconfigurationCallback( | |
| 264 CapturerMac::DisplaysReconfiguredCallback, this); | |
| 265 if (err != kCGErrorSuccess) { | |
| 266 LOG(ERROR) << "CGDisplayRemoveReconfigurationCallback " << err; | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 bool CapturerMac::Init() { | |
| 271 CGError err = | |
| 272 CGRegisterScreenRefreshCallback(CapturerMac::ScreenRefreshCallback, | |
| 273 this); | |
| 274 if (err != kCGErrorSuccess) { | |
| 275 LOG(ERROR) << "CGRegisterScreenRefreshCallback " << err; | |
| 276 return false; | |
| 277 } | |
| 278 | |
| 279 err = CGScreenRegisterMoveCallback(CapturerMac::ScreenUpdateMoveCallback, | |
| 280 this); | |
| 281 if (err != kCGErrorSuccess) { | |
| 282 LOG(ERROR) << "CGScreenRegisterMoveCallback " << err; | |
| 283 return false; | |
| 284 } | |
| 285 err = CGDisplayRegisterReconfigurationCallback( | |
| 286 CapturerMac::DisplaysReconfiguredCallback, this); | |
| 287 if (err != kCGErrorSuccess) { | |
| 288 LOG(ERROR) << "CGDisplayRegisterReconfigurationCallback " << err; | |
| 289 return false; | |
| 290 } | |
| 291 | |
| 292 if (base::mac::IsOSLionOrLater()) { | |
| 293 display_create_image_func_ = | |
| 294 reinterpret_cast<CGDisplayCreateImageFunc>( | |
| 295 dlsym(RTLD_NEXT, "CGDisplayCreateImage")); | |
| 296 if (!display_create_image_func_) { | |
| 297 LOG(ERROR) << "Unable to load CGDisplayCreateImage on Lion"; | |
| 298 return false; | |
| 299 } | |
| 300 } | |
| 301 ScreenConfigurationChanged(); | |
| 302 return true; | |
| 303 } | |
| 304 | |
| 305 void CapturerMac::ReleaseBuffers() { | |
| 306 if (cgl_context_) { | |
| 307 pixel_buffer_object_.Release(); | |
| 308 CGLDestroyContext(cgl_context_); | |
| 309 cgl_context_ = NULL; | |
| 310 } | |
| 311 // The buffers might be in use by the encoder, so don't delete them here. | |
| 312 // Instead, mark them as "needs update"; next time the buffers are used by | |
| 313 // the capturer, they will be recreated if necessary. | |
| 314 for (int i = 0; i < kNumBuffers; ++i) { | |
| 315 buffers_[i].set_needs_update(); | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 void CapturerMac::Start( | |
| 320 const CursorShapeChangedCallback& callback) { | |
| 321 cursor_shape_changed_callback_ = callback; | |
| 322 | |
| 323 // Create power management assertions to wake the display and prevent it from | |
| 324 // going to sleep on user idle. | |
| 325 IOPMAssertionCreate(kIOPMAssertionTypeNoDisplaySleep, | |
| 326 kIOPMAssertionLevelOn, | |
| 327 &power_assertion_id_display_); | |
| 328 IOPMAssertionCreate(CFSTR("UserIsActive"), | |
| 329 kIOPMAssertionLevelOn, | |
| 330 &power_assertion_id_user_); | |
| 331 } | |
| 332 | |
| 333 void CapturerMac::Stop() { | |
| 334 if (power_assertion_id_display_ != kIOPMNullAssertionID) { | |
| 335 IOPMAssertionRelease(power_assertion_id_display_); | |
| 336 power_assertion_id_display_ = kIOPMNullAssertionID; | |
| 337 } | |
| 338 if (power_assertion_id_user_ != kIOPMNullAssertionID) { | |
| 339 IOPMAssertionRelease(power_assertion_id_user_); | |
| 340 power_assertion_id_user_ = kIOPMNullAssertionID; | |
| 341 } | |
| 342 } | |
| 343 | |
| 344 void CapturerMac::ScreenConfigurationChanged() { | |
| 345 ReleaseBuffers(); | |
| 346 helper_.ClearInvalidRegion(); | |
| 347 last_buffer_ = NULL; | |
| 348 | |
| 349 CGDirectDisplayID mainDevice = CGMainDisplayID(); | |
| 350 int width = CGDisplayPixelsWide(mainDevice); | |
| 351 int height = CGDisplayPixelsHigh(mainDevice); | |
| 352 InvalidateScreen(SkISize::Make(width, height)); | |
| 353 | |
| 354 if (!CGDisplayUsesOpenGLAcceleration(mainDevice)) { | |
| 355 VLOG(3) << "OpenGL support not available."; | |
| 356 return; | |
| 357 } | |
| 358 | |
| 359 if (display_create_image_func_ != NULL) { | |
| 360 // No need for any OpenGL support on Lion | |
| 361 return; | |
| 362 } | |
| 363 | |
| 364 CGLPixelFormatAttribute attributes[] = { | |
| 365 kCGLPFAFullScreen, | |
| 366 kCGLPFADisplayMask, | |
| 367 (CGLPixelFormatAttribute)CGDisplayIDToOpenGLDisplayMask(mainDevice), | |
| 368 (CGLPixelFormatAttribute)0 | |
| 369 }; | |
| 370 CGLPixelFormatObj pixel_format = NULL; | |
| 371 GLint matching_pixel_format_count = 0; | |
| 372 CGLError err = CGLChoosePixelFormat(attributes, | |
| 373 &pixel_format, | |
| 374 &matching_pixel_format_count); | |
| 375 DCHECK_EQ(err, kCGLNoError); | |
| 376 err = CGLCreateContext(pixel_format, NULL, &cgl_context_); | |
| 377 DCHECK_EQ(err, kCGLNoError); | |
| 378 CGLDestroyPixelFormat(pixel_format); | |
| 379 CGLSetFullScreen(cgl_context_); | |
| 380 CGLSetCurrentContext(cgl_context_); | |
| 381 | |
| 382 size_t buffer_size = width * height * sizeof(uint32_t); | |
| 383 pixel_buffer_object_.Init(cgl_context_, buffer_size); | |
| 384 } | |
| 385 | |
| 386 media::VideoFrame::Format CapturerMac::pixel_format() const { | |
| 387 return pixel_format_; | |
| 388 } | |
| 389 | |
| 390 void CapturerMac::ClearInvalidRegion() { | |
| 391 helper_.ClearInvalidRegion(); | |
| 392 } | |
| 393 | |
| 394 void CapturerMac::InvalidateRegion(const SkRegion& invalid_region) { | |
| 395 helper_.InvalidateRegion(invalid_region); | |
| 396 } | |
| 397 | |
| 398 void CapturerMac::InvalidateScreen(const SkISize& size) { | |
| 399 helper_.InvalidateScreen(size); | |
| 400 } | |
| 401 | |
| 402 void CapturerMac::InvalidateFullScreen() { | |
| 403 helper_.InvalidateFullScreen(); | |
| 404 } | |
| 405 | |
| 406 void CapturerMac::CaptureInvalidRegion( | |
| 407 const CaptureCompletedCallback& callback) { | |
| 408 // Only allow captures when the display configuration is not occurring. | |
| 409 scoped_refptr<CaptureData> data; | |
| 410 | |
| 411 // Critical section shared with DisplaysReconfigured(...). | |
| 412 CHECK(display_configuration_capture_event_.TimedWait( | |
| 413 base::TimeDelta::FromSeconds(kDisplayReconfigurationTimeoutInSeconds))); | |
| 414 SkRegion region; | |
| 415 helper_.SwapInvalidRegion(®ion); | |
| 416 VideoFrameBuffer& current_buffer = buffers_[current_buffer_]; | |
| 417 current_buffer.Update(); | |
| 418 | |
| 419 bool flip = false; // GL capturers need flipping. | |
| 420 if (display_create_image_func_ != NULL) { | |
| 421 // Lion requires us to use their new APIs for doing screen capture. | |
| 422 CgBlitPostLion(current_buffer, region); | |
| 423 } else if (cgl_context_) { | |
| 424 flip = true; | |
| 425 if (pixel_buffer_object_.get() != 0) { | |
| 426 GlBlitFast(current_buffer, region); | |
| 427 } else { | |
| 428 // See comment in scoped_pixel_buffer_object::Init about why the slow | |
| 429 // path is always used on 10.5. | |
| 430 GlBlitSlow(current_buffer); | |
| 431 } | |
| 432 } else { | |
| 433 CgBlitPreLion(current_buffer, region); | |
| 434 } | |
| 435 | |
| 436 DataPlanes planes; | |
| 437 planes.data[0] = current_buffer.ptr(); | |
| 438 planes.strides[0] = current_buffer.bytes_per_row(); | |
| 439 if (flip) { | |
| 440 planes.strides[0] = -planes.strides[0]; | |
| 441 planes.data[0] += | |
| 442 (current_buffer.size().height() - 1) * current_buffer.bytes_per_row(); | |
| 443 } | |
| 444 | |
| 445 data = new CaptureData(planes, current_buffer.size(), pixel_format()); | |
| 446 data->mutable_dirty_region() = region; | |
| 447 | |
| 448 current_buffer_ = (current_buffer_ + 1) % kNumBuffers; | |
| 449 helper_.set_size_most_recent(data->size()); | |
| 450 display_configuration_capture_event_.Signal(); | |
| 451 | |
| 452 CaptureCursor(); | |
| 453 | |
| 454 callback.Run(data); | |
| 455 } | |
| 456 | |
| 457 void CapturerMac::CaptureCursor() { | |
| 458 if (cursor_shape_changed_callback_.is_null()) { | |
| 459 return; | |
| 460 } | |
| 461 | |
| 462 NSCursor* cursor = [NSCursor currentSystemCursor]; | |
| 463 if (cursor == nil) { | |
| 464 return; | |
| 465 } | |
| 466 | |
| 467 NSImage* nsimage = [cursor image]; | |
| 468 NSPoint hotspot = [cursor hotSpot]; | |
| 469 NSSize size = [nsimage size]; | |
| 470 CGImageRef image = [nsimage CGImageForProposedRect:NULL | |
| 471 context:nil | |
| 472 hints:nil]; | |
| 473 if (image == nil) { | |
| 474 return; | |
| 475 } | |
| 476 | |
| 477 if (CGImageGetBitsPerPixel(image) != 32 || | |
| 478 CGImageGetBytesPerRow(image) != (size.width * 4) || | |
| 479 CGImageGetBitsPerComponent(image) != 8) { | |
| 480 return; | |
| 481 } | |
| 482 | |
| 483 // Compare the current cursor with the last one we sent to the client | |
| 484 // and exit if the cursor is the same. | |
| 485 if (current_cursor_.get() != NULL) { | |
| 486 CGImageRef current = current_cursor_.get(); | |
| 487 if (CGImageGetWidth(image) == CGImageGetWidth(current) && | |
| 488 CGImageGetHeight(image) == CGImageGetHeight(current) && | |
| 489 CGImageGetBitsPerPixel(image) == CGImageGetBitsPerPixel(current) && | |
| 490 CGImageGetBytesPerRow(image) == CGImageGetBytesPerRow(current) && | |
| 491 CGImageGetBitsPerComponent(image) == | |
| 492 CGImageGetBitsPerComponent(current)) { | |
| 493 CGDataProviderRef provider_new = CGImageGetDataProvider(image); | |
| 494 base::mac::ScopedCFTypeRef<CFDataRef> data_ref_new( | |
| 495 CGDataProviderCopyData(provider_new)); | |
| 496 CGDataProviderRef provider_current = CGImageGetDataProvider(current); | |
| 497 base::mac::ScopedCFTypeRef<CFDataRef> data_ref_current( | |
| 498 CGDataProviderCopyData(provider_current)); | |
| 499 | |
| 500 if (data_ref_new.get() != NULL && data_ref_current.get() != NULL) { | |
| 501 int data_size = CFDataGetLength(data_ref_new); | |
| 502 CHECK(data_size == CFDataGetLength(data_ref_current)); | |
| 503 const uint8* data_new = CFDataGetBytePtr(data_ref_new); | |
| 504 const uint8* data_current = CFDataGetBytePtr(data_ref_current); | |
| 505 if (memcmp(data_new, data_current, data_size) == 0) { | |
| 506 return; | |
| 507 } | |
| 508 } | |
| 509 } | |
| 510 } | |
| 511 | |
| 512 VLOG(3) << "Sending cursor: " << size.width << "x" << size.height; | |
| 513 | |
| 514 CGDataProviderRef provider = CGImageGetDataProvider(image); | |
| 515 base::mac::ScopedCFTypeRef<CFDataRef> image_data_ref( | |
| 516 CGDataProviderCopyData(provider)); | |
| 517 if (image_data_ref.get() == NULL) { | |
| 518 return; | |
| 519 } | |
| 520 const uint8* cursor_src_data = CFDataGetBytePtr(image_data_ref); | |
| 521 int data_size = CFDataGetLength(image_data_ref); | |
| 522 | |
| 523 // Create a CursorShapeInfo proto that describes the cursor and pass it to | |
| 524 // the client. | |
| 525 scoped_ptr<protocol::CursorShapeInfo> cursor_proto( | |
| 526 new protocol::CursorShapeInfo()); | |
| 527 cursor_proto->mutable_data()->resize(data_size); | |
| 528 uint8* cursor_tgt_data = const_cast<uint8*>(reinterpret_cast<const uint8*>( | |
| 529 cursor_proto->mutable_data()->data())); | |
| 530 | |
| 531 memcpy(cursor_tgt_data, cursor_src_data, data_size); | |
| 532 | |
| 533 cursor_proto->set_width(size.width); | |
| 534 cursor_proto->set_height(size.height); | |
| 535 cursor_proto->set_hotspot_x(hotspot.x); | |
| 536 cursor_proto->set_hotspot_y(hotspot.y); | |
| 537 cursor_shape_changed_callback_.Run(cursor_proto.Pass()); | |
| 538 | |
| 539 // Record the last cursor image that we sent. | |
| 540 current_cursor_.reset(CGImageCreateCopy(image)); | |
| 541 } | |
| 542 | |
| 543 void CapturerMac::GlBlitFast(const VideoFrameBuffer& buffer, | |
| 544 const SkRegion& region) { | |
| 545 const int buffer_height = buffer.size().height(); | |
| 546 const int buffer_width = buffer.size().width(); | |
| 547 | |
| 548 // Clip to the size of our current screen. | |
| 549 SkIRect clip_rect = SkIRect::MakeWH(buffer_width, buffer_height); | |
| 550 if (last_buffer_) { | |
| 551 // We are doing double buffer for the capture data so we just need to copy | |
| 552 // the invalid region from the previous capture in the current buffer. | |
| 553 // TODO(hclam): We can reduce the amount of copying here by subtracting | |
| 554 // |capturer_helper_|s region from |last_invalid_region_|. | |
| 555 // http://crbug.com/92354 | |
| 556 | |
| 557 // Since the image obtained from OpenGL is upside-down, need to do some | |
| 558 // magic here to copy the correct rectangle. | |
| 559 const int y_offset = (buffer_height - 1) * buffer.bytes_per_row(); | |
| 560 for(SkRegion::Iterator i(last_invalid_region_); !i.done(); i.next()) { | |
| 561 SkIRect copy_rect = i.rect(); | |
| 562 if (copy_rect.intersect(clip_rect)) { | |
| 563 CopyRect(last_buffer_ + y_offset, | |
| 564 -buffer.bytes_per_row(), | |
| 565 buffer.ptr() + y_offset, | |
| 566 -buffer.bytes_per_row(), | |
| 567 4, // Bytes for pixel for RGBA. | |
| 568 copy_rect); | |
| 569 } | |
| 570 } | |
| 571 } | |
| 572 last_buffer_ = buffer.ptr(); | |
| 573 last_invalid_region_ = region; | |
| 574 | |
| 575 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 576 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pixel_buffer_object_.get()); | |
| 577 glReadPixels(0, 0, buffer_width, buffer_height, GL_BGRA, GL_UNSIGNED_BYTE, 0); | |
| 578 GLubyte* ptr = static_cast<GLubyte*>( | |
| 579 glMapBufferARB(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY_ARB)); | |
| 580 if (ptr == NULL) { | |
| 581 // If the buffer can't be mapped, assume that it's no longer valid and | |
| 582 // release it. | |
| 583 pixel_buffer_object_.Release(); | |
| 584 } else { | |
| 585 // Copy only from the dirty rects. Since the image obtained from OpenGL is | |
| 586 // upside-down we need to do some magic here to copy the correct rectangle. | |
| 587 const int y_offset = (buffer_height - 1) * buffer.bytes_per_row(); | |
| 588 for(SkRegion::Iterator i(region); !i.done(); i.next()) { | |
| 589 SkIRect copy_rect = i.rect(); | |
| 590 if (copy_rect.intersect(clip_rect)) { | |
| 591 CopyRect(ptr + y_offset, | |
| 592 -buffer.bytes_per_row(), | |
| 593 buffer.ptr() + y_offset, | |
| 594 -buffer.bytes_per_row(), | |
| 595 4, // Bytes for pixel for RGBA. | |
| 596 copy_rect); | |
| 597 } | |
| 598 } | |
| 599 } | |
| 600 if (!glUnmapBufferARB(GL_PIXEL_PACK_BUFFER_ARB)) { | |
| 601 // If glUnmapBuffer returns false, then the contents of the data store are | |
| 602 // undefined. This might be because the screen mode has changed, in which | |
| 603 // case it will be recreated in ScreenConfigurationChanged, but releasing | |
| 604 // the object here is the best option. Capturing will fall back on | |
| 605 // GlBlitSlow until such time as the pixel buffer object is recreated. | |
| 606 pixel_buffer_object_.Release(); | |
| 607 } | |
| 608 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, 0); | |
| 609 } | |
| 610 | |
| 611 void CapturerMac::GlBlitSlow(const VideoFrameBuffer& buffer) { | |
| 612 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 613 glReadBuffer(GL_FRONT); | |
| 614 glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT); | |
| 615 glPixelStorei(GL_PACK_ALIGNMENT, 4); // Force 4-byte alignment. | |
| 616 glPixelStorei(GL_PACK_ROW_LENGTH, 0); | |
| 617 glPixelStorei(GL_PACK_SKIP_ROWS, 0); | |
| 618 glPixelStorei(GL_PACK_SKIP_PIXELS, 0); | |
| 619 // Read a block of pixels from the frame buffer. | |
| 620 glReadPixels(0, 0, buffer.size().width(), buffer.size().height(), | |
| 621 GL_BGRA, GL_UNSIGNED_BYTE, buffer.ptr()); | |
| 622 glPopClientAttrib(); | |
| 623 } | |
| 624 | |
| 625 void CapturerMac::CgBlitPreLion(const VideoFrameBuffer& buffer, | |
| 626 const SkRegion& region) { | |
| 627 const int buffer_height = buffer.size().height(); | |
| 628 const int buffer_width = buffer.size().width(); | |
| 629 | |
| 630 // Clip to the size of our current screen. | |
| 631 SkIRect clip_rect = SkIRect::MakeWH(buffer_width, buffer_height); | |
| 632 | |
| 633 if (last_buffer_) | |
| 634 memcpy(buffer.ptr(), last_buffer_, buffer.bytes_per_row() * buffer_height); | |
| 635 last_buffer_ = buffer.ptr(); | |
| 636 CGDirectDisplayID main_display = CGMainDisplayID(); | |
| 637 uint8* display_base_address = | |
| 638 reinterpret_cast<uint8*>(CGDisplayBaseAddress(main_display)); | |
| 639 int src_bytes_per_row = CGDisplayBytesPerRow(main_display); | |
| 640 int src_bytes_per_pixel = CGDisplayBitsPerPixel(main_display) / 8; | |
| 641 // TODO(hclam): We can reduce the amount of copying here by subtracting | |
| 642 // |capturer_helper_|s region from |last_invalid_region_|. | |
| 643 // http://crbug.com/92354 | |
| 644 for(SkRegion::Iterator i(region); !i.done(); i.next()) { | |
| 645 SkIRect copy_rect = i.rect(); | |
| 646 if (copy_rect.intersect(clip_rect)) { | |
| 647 CopyRect(display_base_address, | |
| 648 src_bytes_per_row, | |
| 649 buffer.ptr(), | |
| 650 buffer.bytes_per_row(), | |
| 651 src_bytes_per_pixel, | |
| 652 copy_rect); | |
| 653 } | |
| 654 } | |
| 655 } | |
| 656 | |
| 657 void CapturerMac::CgBlitPostLion(const VideoFrameBuffer& buffer, | |
| 658 const SkRegion& region) { | |
| 659 const int buffer_height = buffer.size().height(); | |
| 660 const int buffer_width = buffer.size().width(); | |
| 661 | |
| 662 // Clip to the size of our current screen. | |
| 663 SkIRect clip_rect = SkIRect::MakeWH(buffer_width, buffer_height); | |
| 664 | |
| 665 if (last_buffer_) | |
| 666 memcpy(buffer.ptr(), last_buffer_, buffer.bytes_per_row() * buffer_height); | |
| 667 last_buffer_ = buffer.ptr(); | |
| 668 CGDirectDisplayID display = CGMainDisplayID(); | |
| 669 base::mac::ScopedCFTypeRef<CGImageRef> image( | |
| 670 display_create_image_func_(display)); | |
| 671 if (image.get() == NULL) | |
| 672 return; | |
| 673 CGDataProviderRef provider = CGImageGetDataProvider(image); | |
| 674 base::mac::ScopedCFTypeRef<CFDataRef> data(CGDataProviderCopyData(provider)); | |
| 675 if (data.get() == NULL) | |
| 676 return; | |
| 677 const uint8* display_base_address = CFDataGetBytePtr(data); | |
| 678 int src_bytes_per_row = CGImageGetBytesPerRow(image); | |
| 679 int src_bytes_per_pixel = CGImageGetBitsPerPixel(image) / 8; | |
| 680 // TODO(hclam): We can reduce the amount of copying here by subtracting | |
| 681 // |capturer_helper_|s region from |last_invalid_region_|. | |
| 682 // http://crbug.com/92354 | |
| 683 for(SkRegion::Iterator i(region); !i.done(); i.next()) { | |
| 684 SkIRect copy_rect = i.rect(); | |
| 685 if (copy_rect.intersect(clip_rect)) { | |
| 686 CopyRect(display_base_address, | |
| 687 src_bytes_per_row, | |
| 688 buffer.ptr(), | |
| 689 buffer.bytes_per_row(), | |
| 690 src_bytes_per_pixel, | |
| 691 copy_rect); | |
| 692 } | |
| 693 } | |
| 694 } | |
| 695 | |
| 696 const SkISize& CapturerMac::size_most_recent() const { | |
| 697 return helper_.size_most_recent(); | |
| 698 } | |
| 699 | |
| 700 void CapturerMac::ScreenRefresh(CGRectCount count, const CGRect *rect_array) { | |
| 701 SkIRect skirect_array[count]; | |
| 702 for (CGRectCount i = 0; i < count; ++i) { | |
| 703 skirect_array[i] = CGRectToSkIRect(rect_array[i]); | |
| 704 } | |
| 705 SkRegion region; | |
| 706 region.setRects(skirect_array, count); | |
| 707 InvalidateRegion(region); | |
| 708 } | |
| 709 | |
| 710 void CapturerMac::ScreenUpdateMove(CGScreenUpdateMoveDelta delta, | |
| 711 size_t count, | |
| 712 const CGRect *rect_array) { | |
| 713 SkIRect skirect_new_array[count]; | |
| 714 for (CGRectCount i = 0; i < count; ++i) { | |
| 715 CGRect rect = rect_array[i]; | |
| 716 rect = CGRectOffset(rect, delta.dX, delta.dY); | |
| 717 skirect_new_array[i] = CGRectToSkIRect(rect); | |
| 718 } | |
| 719 SkRegion region; | |
| 720 region.setRects(skirect_new_array, count); | |
| 721 InvalidateRegion(region); | |
| 722 } | |
| 723 | |
| 724 void CapturerMac::DisplaysReconfigured(CGDirectDisplayID display, | |
| 725 CGDisplayChangeSummaryFlags flags) { | |
| 726 if (display == CGMainDisplayID()) { | |
| 727 if (flags & kCGDisplayBeginConfigurationFlag) { | |
| 728 // Wait on |display_configuration_capture_event_| to prevent more | |
| 729 // captures from occurring on a different thread while the displays | |
| 730 // are being reconfigured. | |
| 731 CHECK(display_configuration_capture_event_.TimedWait( | |
| 732 base::TimeDelta::FromSeconds( | |
| 733 kDisplayReconfigurationTimeoutInSeconds))); | |
| 734 } else { | |
| 735 ScreenConfigurationChanged(); | |
| 736 // Now that the configuration has changed, signal the event. | |
| 737 display_configuration_capture_event_.Signal(); | |
| 738 } | |
| 739 } | |
| 740 } | |
| 741 | |
| 742 void CapturerMac::ScreenRefreshCallback(CGRectCount count, | |
| 743 const CGRect *rect_array, | |
| 744 void *user_parameter) { | |
| 745 CapturerMac *capturer = reinterpret_cast<CapturerMac *>(user_parameter); | |
| 746 capturer->ScreenRefresh(count, rect_array); | |
| 747 } | |
| 748 | |
| 749 void CapturerMac::ScreenUpdateMoveCallback(CGScreenUpdateMoveDelta delta, | |
| 750 size_t count, | |
| 751 const CGRect *rect_array, | |
| 752 void *user_parameter) { | |
| 753 CapturerMac *capturer = reinterpret_cast<CapturerMac *>(user_parameter); | |
| 754 capturer->ScreenUpdateMove(delta, count, rect_array); | |
| 755 } | |
| 756 | |
| 757 void CapturerMac::DisplaysReconfiguredCallback( | |
| 758 CGDirectDisplayID display, | |
| 759 CGDisplayChangeSummaryFlags flags, | |
| 760 void *user_parameter) { | |
| 761 CapturerMac *capturer = reinterpret_cast<CapturerMac *>(user_parameter); | |
| 762 capturer->DisplaysReconfigured(display, flags); | |
| 763 } | |
| 764 | |
| 765 } // namespace | |
| 766 | |
| 767 // static | |
| 768 Capturer* Capturer::Create() { | |
| 769 CapturerMac* capturer = new CapturerMac(); | |
| 770 if (!capturer->Init()) { | |
| 771 delete capturer; | |
| 772 capturer = NULL; | |
| 773 } | |
| 774 return capturer; | |
| 775 } | |
| 776 | |
| 777 } // namespace remoting | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 10790075:
Rename Capturer to VideoFrameCapturer. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src