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| 1 // Copyright (c) 2010 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 "chrome/browser/renderer_host/backing_store_x.h" | |
| 6 | |
| 7 #include <cairo-xlib.h> | |
| 8 #include <gtk/gtk.h> | |
| 9 #include <stdlib.h> | |
| 10 #include <sys/ipc.h> | |
| 11 #include <sys/shm.h> | |
| 12 | |
| 13 #if defined(OS_OPENBSD) || defined(OS_FREEBSD) | |
| 14 #include <sys/endian.h> | |
| 15 #endif | |
| 16 | |
| 17 #include <algorithm> | |
| 18 #include <utility> | |
| 19 #include <limits> | |
| 20 | |
| 21 #include "app/surface/transport_dib.h" | |
| 22 #include "base/compiler_specific.h" | |
| 23 #include "base/logging.h" | |
| 24 #include "base/metrics/histogram.h" | |
| 25 #include "base/time.h" | |
| 26 #include "chrome/browser/renderer_host/render_process_host.h" | |
| 27 #include "skia/ext/platform_canvas.h" | |
| 28 #include "third_party/skia/include/core/SkBitmap.h" | |
| 29 #include "ui/base/x/x11_util.h" | |
| 30 #include "ui/base/x/x11_util_internal.h" | |
| 31 #include "ui/gfx/rect.h" | |
| 32 | |
| 33 // Assume that somewhere along the line, someone will do width * height * 4 | |
| 34 // with signed numbers. If the maximum value is 2**31, then 2**31 / 4 = | |
| 35 // 2**29 and floor(sqrt(2**29)) = 23170. | |
| 36 | |
| 37 // Max height and width for layers | |
| 38 static const int kMaxVideoLayerSize = 23170; | |
| 39 | |
| 40 | |
| 41 // X Backing Stores: | |
| 42 // | |
| 43 // Unlike Windows, where the backing store is kept in heap memory, we keep our | |
| 44 // backing store in the X server, as a pixmap. Thus expose events just require | |
| 45 // instructing the X server to copy from the backing store to the window. | |
| 46 // | |
| 47 // The backing store is in the same format as the visual which our main window | |
| 48 // is using. Bitmaps from the renderer are uploaded to the X server, either via | |
| 49 // shared memory or over the wire, and XRENDER is used to convert them to the | |
| 50 // correct format for the backing store. | |
| 51 | |
| 52 // Destroys the image and the associated shared memory structures. This is a | |
| 53 // helper function for code using shared memory. | |
| 54 static void DestroySharedImage(Display* display, | |
| 55 XImage* image, | |
| 56 XShmSegmentInfo* shminfo) { | |
| 57 XShmDetach(display, shminfo); | |
| 58 XDestroyImage(image); | |
| 59 shmdt(shminfo->shmaddr); | |
| 60 } | |
| 61 | |
| 62 BackingStoreX::BackingStoreX(RenderWidgetHost* widget, | |
| 63 const gfx::Size& size, | |
| 64 void* visual, | |
| 65 int depth) | |
| 66 : BackingStore(widget, size), | |
| 67 display_(ui::GetXDisplay()), | |
| 68 shared_memory_support_(ui::QuerySharedMemorySupport(display_)), | |
| 69 use_render_(ui::QueryRenderSupport(display_)), | |
| 70 visual_(visual), | |
| 71 visual_depth_(depth), | |
| 72 root_window_(ui::GetX11RootWindow()) { | |
| 73 #if defined(OS_OPENBSD) || defined(OS_FREEBSD) | |
| 74 COMPILE_ASSERT(_BYTE_ORDER == _LITTLE_ENDIAN, assumes_little_endian); | |
| 75 #else | |
| 76 COMPILE_ASSERT(__BYTE_ORDER == __LITTLE_ENDIAN, assumes_little_endian); | |
| 77 #endif | |
| 78 | |
| 79 pixmap_ = XCreatePixmap(display_, root_window_, | |
| 80 size.width(), size.height(), depth); | |
| 81 | |
| 82 if (use_render_) { | |
| 83 picture_ = XRenderCreatePicture( | |
| 84 display_, pixmap_, | |
| 85 ui::GetRenderVisualFormat(display_, | |
| 86 static_cast<Visual*>(visual)), | |
| 87 0, NULL); | |
| 88 pixmap_bpp_ = 0; | |
| 89 } else { | |
| 90 picture_ = 0; | |
| 91 pixmap_bpp_ = ui::BitsPerPixelForPixmapDepth(display_, depth); | |
| 92 } | |
| 93 | |
| 94 pixmap_gc_ = XCreateGC(display_, pixmap_, 0, NULL); | |
| 95 } | |
| 96 | |
| 97 BackingStoreX::BackingStoreX(RenderWidgetHost* widget, const gfx::Size& size) | |
| 98 : BackingStore(widget, size), | |
| 99 display_(NULL), | |
| 100 shared_memory_support_(ui::SHARED_MEMORY_NONE), | |
| 101 use_render_(false), | |
| 102 pixmap_bpp_(0), | |
| 103 visual_(NULL), | |
| 104 visual_depth_(-1), | |
| 105 root_window_(0), | |
| 106 pixmap_(0), | |
| 107 picture_(0), | |
| 108 pixmap_gc_(NULL) { | |
| 109 } | |
| 110 | |
| 111 BackingStoreX::~BackingStoreX() { | |
| 112 // In unit tests, display_ may be NULL. | |
| 113 if (!display_) | |
| 114 return; | |
| 115 | |
| 116 XRenderFreePicture(display_, picture_); | |
| 117 XFreePixmap(display_, pixmap_); | |
| 118 XFreeGC(display_, static_cast<GC>(pixmap_gc_)); | |
| 119 } | |
| 120 | |
| 121 size_t BackingStoreX::MemorySize() { | |
| 122 if (!use_render_) | |
| 123 return size().GetArea() * (pixmap_bpp_ / 8); | |
| 124 else | |
| 125 return size().GetArea() * 4; | |
| 126 } | |
| 127 | |
| 128 void BackingStoreX::PaintRectWithoutXrender( | |
| 129 TransportDIB* bitmap, | |
| 130 const gfx::Rect& bitmap_rect, | |
| 131 const std::vector<gfx::Rect>& copy_rects) { | |
| 132 const int width = bitmap_rect.width(); | |
| 133 const int height = bitmap_rect.height(); | |
| 134 Pixmap pixmap = XCreatePixmap(display_, root_window_, width, height, | |
| 135 visual_depth_); | |
| 136 | |
| 137 // Draw ARGB transport DIB onto our pixmap. | |
| 138 ui::PutARGBImage(display_, visual_, visual_depth_, pixmap, | |
| 139 pixmap_gc_, static_cast<uint8*>(bitmap->memory()), | |
| 140 width, height); | |
| 141 | |
| 142 for (size_t i = 0; i < copy_rects.size(); i++) { | |
| 143 const gfx::Rect& copy_rect = copy_rects[i]; | |
| 144 XCopyArea(display_, | |
| 145 pixmap, // src | |
| 146 pixmap_, // dest | |
| 147 static_cast<GC>(pixmap_gc_), // gc | |
| 148 copy_rect.x() - bitmap_rect.x(), // src_x | |
| 149 copy_rect.y() - bitmap_rect.y(), // src_y | |
| 150 copy_rect.width(), // width | |
| 151 copy_rect.height(), // height | |
| 152 copy_rect.x(), // dest_x | |
| 153 copy_rect.y()); // dest_y | |
| 154 } | |
| 155 | |
| 156 XFreePixmap(display_, pixmap); | |
| 157 } | |
| 158 | |
| 159 void BackingStoreX::PaintToBackingStore( | |
| 160 RenderProcessHost* process, | |
| 161 TransportDIB::Id bitmap, | |
| 162 const gfx::Rect& bitmap_rect, | |
| 163 const std::vector<gfx::Rect>& copy_rects) { | |
| 164 if (!display_) | |
| 165 return; | |
| 166 | |
| 167 if (bitmap_rect.IsEmpty()) | |
| 168 return; | |
| 169 | |
| 170 const int width = bitmap_rect.width(); | |
| 171 const int height = bitmap_rect.height(); | |
| 172 | |
| 173 if (width <= 0 || width > kMaxVideoLayerSize || | |
| 174 height <= 0 || height > kMaxVideoLayerSize) | |
| 175 return; | |
| 176 | |
| 177 TransportDIB* dib = process->GetTransportDIB(bitmap); | |
| 178 if (!dib) | |
| 179 return; | |
| 180 | |
| 181 if (!use_render_) | |
| 182 return PaintRectWithoutXrender(dib, bitmap_rect, copy_rects); | |
| 183 | |
| 184 Picture picture; | |
| 185 Pixmap pixmap; | |
| 186 | |
| 187 if (shared_memory_support_ == ui::SHARED_MEMORY_PIXMAP) { | |
| 188 XShmSegmentInfo shminfo = {0}; | |
| 189 shminfo.shmseg = dib->MapToX(display_); | |
| 190 | |
| 191 // The NULL in the following is the |data| pointer: this is an artifact of | |
| 192 // Xlib trying to be helpful, rather than just exposing the X protocol. It | |
| 193 // assumes that we have the shared memory segment mapped into our memory, | |
| 194 // which we don't, and it's trying to calculate an offset by taking the | |
| 195 // difference between the |data| pointer and the address of the mapping in | |
| 196 // |shminfo|. Since both are NULL, the offset will be calculated to be 0, | |
| 197 // which is correct for us. | |
| 198 pixmap = XShmCreatePixmap(display_, root_window_, NULL, &shminfo, | |
| 199 width, height, 32); | |
| 200 } else { | |
| 201 // We don't have shared memory pixmaps. Fall back to creating a pixmap | |
| 202 // ourselves and putting an image on it. | |
| 203 pixmap = XCreatePixmap(display_, root_window_, width, height, 32); | |
| 204 GC gc = XCreateGC(display_, pixmap, 0, NULL); | |
| 205 | |
| 206 if (shared_memory_support_ == ui::SHARED_MEMORY_PUTIMAGE) { | |
| 207 const XID shmseg = dib->MapToX(display_); | |
| 208 | |
| 209 XShmSegmentInfo shminfo; | |
| 210 memset(&shminfo, 0, sizeof(shminfo)); | |
| 211 shminfo.shmseg = shmseg; | |
| 212 shminfo.shmaddr = static_cast<char*>(dib->memory()); | |
| 213 | |
| 214 XImage* image = XShmCreateImage(display_, static_cast<Visual*>(visual_), | |
| 215 32, ZPixmap, | |
| 216 shminfo.shmaddr, &shminfo, | |
| 217 width, height); | |
| 218 | |
| 219 // This code path is important for performance and we have found that | |
| 220 // different techniques work better on different platforms. See | |
| 221 // http://code.google.com/p/chromium/issues/detail?id=44124. | |
| 222 // | |
| 223 // Checking for ARM is an approximation, but it seems to be a good one so | |
| 224 // far. | |
| 225 #if defined(ARCH_CPU_ARM_FAMILY) | |
| 226 for (size_t i = 0; i < copy_rects.size(); i++) { | |
| 227 const gfx::Rect& copy_rect = copy_rects[i]; | |
| 228 XShmPutImage(display_, pixmap, gc, image, | |
| 229 copy_rect.x() - bitmap_rect.x(), /* source x */ | |
| 230 copy_rect.y() - bitmap_rect.y(), /* source y */ | |
| 231 copy_rect.x() - bitmap_rect.x(), /* dest x */ | |
| 232 copy_rect.y() - bitmap_rect.y(), /* dest y */ | |
| 233 copy_rect.width(), copy_rect.height(), | |
| 234 False /* send_event */); | |
| 235 } | |
| 236 #else | |
| 237 XShmPutImage(display_, pixmap, gc, image, | |
| 238 0, 0 /* source x, y */, 0, 0 /* dest x, y */, | |
| 239 width, height, False /* send_event */); | |
| 240 #endif | |
| 241 XDestroyImage(image); | |
| 242 } else { // case SHARED_MEMORY_NONE | |
| 243 // No shared memory support, we have to copy the bitmap contents | |
| 244 // to the X server. Xlib wraps the underlying PutImage call | |
| 245 // behind several layers of functions which try to convert the | |
| 246 // image into the format which the X server expects. The | |
| 247 // following values hopefully disable all conversions. | |
| 248 XImage image; | |
| 249 memset(&image, 0, sizeof(image)); | |
| 250 | |
| 251 image.width = width; | |
| 252 image.height = height; | |
| 253 image.depth = 32; | |
| 254 image.bits_per_pixel = 32; | |
| 255 image.format = ZPixmap; | |
| 256 image.byte_order = LSBFirst; | |
| 257 image.bitmap_unit = 8; | |
| 258 image.bitmap_bit_order = LSBFirst; | |
| 259 image.bytes_per_line = width * 4; | |
| 260 image.red_mask = 0xff; | |
| 261 image.green_mask = 0xff00; | |
| 262 image.blue_mask = 0xff0000; | |
| 263 image.data = static_cast<char*>(dib->memory()); | |
| 264 | |
| 265 XPutImage(display_, pixmap, gc, &image, | |
| 266 0, 0 /* source x, y */, 0, 0 /* dest x, y */, | |
| 267 width, height); | |
| 268 } | |
| 269 XFreeGC(display_, gc); | |
| 270 } | |
| 271 | |
| 272 picture = ui::CreatePictureFromSkiaPixmap(display_, pixmap); | |
| 273 | |
| 274 for (size_t i = 0; i < copy_rects.size(); i++) { | |
| 275 const gfx::Rect& copy_rect = copy_rects[i]; | |
| 276 XRenderComposite(display_, | |
| 277 PictOpSrc, // op | |
| 278 picture, // src | |
| 279 0, // mask | |
| 280 picture_, // dest | |
| 281 copy_rect.x() - bitmap_rect.x(), // src_x | |
| 282 copy_rect.y() - bitmap_rect.y(), // src_y | |
| 283 0, // mask_x | |
| 284 0, // mask_y | |
| 285 copy_rect.x(), // dest_x | |
| 286 copy_rect.y(), // dest_y | |
| 287 copy_rect.width(), // width | |
| 288 copy_rect.height()); // height | |
| 289 } | |
| 290 | |
| 291 // In the case of shared memory, we wait for the composite to complete so that | |
| 292 // we are sure that the X server has finished reading from the shared memory | |
| 293 // segment. | |
| 294 if (shared_memory_support_ != ui::SHARED_MEMORY_NONE) | |
| 295 XSync(display_, False); | |
| 296 | |
| 297 XRenderFreePicture(display_, picture); | |
| 298 XFreePixmap(display_, pixmap); | |
| 299 } | |
| 300 | |
| 301 bool BackingStoreX::CopyFromBackingStore(const gfx::Rect& rect, | |
| 302 skia::PlatformCanvas* output) { | |
| 303 base::TimeTicks begin_time = base::TimeTicks::Now(); | |
| 304 | |
| 305 if (visual_depth_ < 24) { | |
| 306 // CopyFromBackingStore() copies pixels out of the XImage | |
| 307 // in a way that assumes that each component (red, green, | |
| 308 // blue) is a byte. This doesn't work on visuals which | |
| 309 // encode a pixel color with less than a byte per color. | |
| 310 return false; | |
| 311 } | |
| 312 | |
| 313 const int width = std::min(size().width(), rect.width()); | |
| 314 const int height = std::min(size().height(), rect.height()); | |
| 315 | |
| 316 XImage* image; | |
| 317 XShmSegmentInfo shminfo; // Used only when shared memory is enabled. | |
| 318 if (shared_memory_support_ != ui::SHARED_MEMORY_NONE) { | |
| 319 // Use shared memory for faster copies when it's available. | |
| 320 Visual* visual = static_cast<Visual*>(visual_); | |
| 321 memset(&shminfo, 0, sizeof(shminfo)); | |
| 322 image = XShmCreateImage(display_, visual, 32, | |
| 323 ZPixmap, NULL, &shminfo, width, height); | |
| 324 if (!image) { | |
| 325 return false; | |
| 326 } | |
| 327 // Create the shared memory segment for the image and map it. | |
| 328 if (image->bytes_per_line == 0 || image->height == 0 || | |
| 329 static_cast<size_t>(image->height) > | |
| 330 (std::numeric_limits<size_t>::max() / image->bytes_per_line)) { | |
| 331 XDestroyImage(image); | |
| 332 return false; | |
| 333 } | |
| 334 shminfo.shmid = shmget(IPC_PRIVATE, image->bytes_per_line * image->height, | |
| 335 IPC_CREAT|0666); | |
| 336 if (shminfo.shmid == -1) { | |
| 337 XDestroyImage(image); | |
| 338 return false; | |
| 339 } | |
| 340 | |
| 341 void* mapped_memory = shmat(shminfo.shmid, NULL, SHM_RDONLY); | |
| 342 shmctl(shminfo.shmid, IPC_RMID, 0); | |
| 343 if (mapped_memory == (void*)-1) { | |
| 344 XDestroyImage(image); | |
| 345 return false; | |
| 346 } | |
| 347 shminfo.shmaddr = image->data = static_cast<char*>(mapped_memory); | |
| 348 | |
| 349 if (!XShmAttach(display_, &shminfo) || | |
| 350 !XShmGetImage(display_, pixmap_, image, rect.x(), rect.y(), | |
| 351 AllPlanes)) { | |
| 352 DestroySharedImage(display_, image, &shminfo); | |
| 353 return false; | |
| 354 } | |
| 355 } else { | |
| 356 // Non-shared memory case just copy the image from the server. | |
| 357 image = XGetImage(display_, pixmap_, | |
| 358 rect.x(), rect.y(), width, height, | |
| 359 AllPlanes, ZPixmap); | |
| 360 } | |
| 361 | |
| 362 // TODO(jhawkins): Need to convert the image data if the image bits per pixel | |
| 363 // is not 32. | |
| 364 // Note that this also initializes the output bitmap as opaque. | |
| 365 if (!output->initialize(width, height, true) || | |
| 366 image->bits_per_pixel != 32) { | |
| 367 if (shared_memory_support_ != ui::SHARED_MEMORY_NONE) | |
| 368 DestroySharedImage(display_, image, &shminfo); | |
| 369 else | |
| 370 XDestroyImage(image); | |
| 371 return false; | |
| 372 } | |
| 373 | |
| 374 // The X image might have a different row stride, so iterate through | |
| 375 // it and copy each row out, only up to the pixels we're actually | |
| 376 // using. This code assumes a visual mode where a pixel is | |
| 377 // represented using a 32-bit unsigned int, with a byte per component. | |
| 378 SkBitmap bitmap = output->getTopPlatformDevice().accessBitmap(true); | |
| 379 for (int y = 0; y < height; y++) { | |
| 380 const uint32* src_row = reinterpret_cast<uint32*>( | |
| 381 &image->data[image->bytes_per_line * y]); | |
| 382 uint32* dest_row = bitmap.getAddr32(0, y); | |
| 383 for (int x = 0; x < width; ++x, ++dest_row) { | |
| 384 // Force alpha to be 0xff, because otherwise it causes rendering problems. | |
| 385 *dest_row = src_row[x] | 0xff000000; | |
| 386 } | |
| 387 } | |
| 388 | |
| 389 if (shared_memory_support_ != ui::SHARED_MEMORY_NONE) | |
| 390 DestroySharedImage(display_, image, &shminfo); | |
| 391 else | |
| 392 XDestroyImage(image); | |
| 393 | |
| 394 HISTOGRAM_TIMES("BackingStore.RetrievalFromX", | |
| 395 base::TimeTicks::Now() - begin_time); | |
| 396 return true; | |
| 397 } | |
| 398 | |
| 399 void BackingStoreX::ScrollBackingStore(int dx, int dy, | |
| 400 const gfx::Rect& clip_rect, | |
| 401 const gfx::Size& view_size) { | |
| 402 if (!display_) | |
| 403 return; | |
| 404 | |
| 405 // We only support scrolling in one direction at a time. | |
| 406 DCHECK(dx == 0 || dy == 0); | |
| 407 | |
| 408 if (dy) { | |
| 409 // Positive values of |dy| scroll up | |
| 410 if (abs(dy) < clip_rect.height()) { | |
| 411 XCopyArea(display_, pixmap_, pixmap_, static_cast<GC>(pixmap_gc_), | |
| 412 clip_rect.x() /* source x */, | |
| 413 std::max(clip_rect.y(), clip_rect.y() - dy), | |
| 414 clip_rect.width(), | |
| 415 clip_rect.height() - abs(dy), | |
| 416 clip_rect.x() /* dest x */, | |
| 417 std::max(clip_rect.y(), clip_rect.y() + dy) /* dest y */); | |
| 418 } | |
| 419 } else if (dx) { | |
| 420 // Positive values of |dx| scroll right | |
| 421 if (abs(dx) < clip_rect.width()) { | |
| 422 XCopyArea(display_, pixmap_, pixmap_, static_cast<GC>(pixmap_gc_), | |
| 423 std::max(clip_rect.x(), clip_rect.x() - dx), | |
| 424 clip_rect.y() /* source y */, | |
| 425 clip_rect.width() - abs(dx), | |
| 426 clip_rect.height(), | |
| 427 std::max(clip_rect.x(), clip_rect.x() + dx) /* dest x */, | |
| 428 clip_rect.y() /* dest x */); | |
| 429 } | |
| 430 } | |
| 431 } | |
| 432 | |
| 433 void BackingStoreX::XShowRect(const gfx::Point &origin, | |
| 434 const gfx::Rect& rect, XID target) { | |
| 435 XCopyArea(display_, pixmap_, target, static_cast<GC>(pixmap_gc_), | |
| 436 rect.x(), rect.y(), rect.width(), rect.height(), | |
| 437 rect.x() + origin.x(), rect.y() + origin.y()); | |
| 438 } | |
| 439 | |
| 440 void BackingStoreX::CairoShowRect(const gfx::Rect& rect, | |
| 441 GdkDrawable* drawable) { | |
| 442 cairo_surface_t* surface = cairo_xlib_surface_create( | |
| 443 display_, pixmap_, static_cast<Visual*>(visual_), | |
| 444 size().width(), size().height()); | |
| 445 cairo_t* cr = gdk_cairo_create(drawable); | |
| 446 cairo_set_source_surface(cr, surface, 0, 0); | |
| 447 | |
| 448 cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height()); | |
| 449 cairo_fill(cr); | |
| 450 cairo_destroy(cr); | |
| 451 cairo_surface_destroy(surface); | |
| 452 } | |
| 453 | |
| 454 #if defined(TOOLKIT_GTK) | |
| 455 void BackingStoreX::PaintToRect(const gfx::Rect& rect, GdkDrawable* target) { | |
| 456 cairo_surface_t* surface = cairo_xlib_surface_create( | |
| 457 display_, pixmap_, static_cast<Visual*>(visual_), | |
| 458 size().width(), size().height()); | |
| 459 cairo_t* cr = gdk_cairo_create(target); | |
| 460 | |
| 461 cairo_translate(cr, rect.x(), rect.y()); | |
| 462 double x_scale = static_cast<double>(rect.width()) / size().width(); | |
| 463 double y_scale = static_cast<double>(rect.height()) / size().height(); | |
| 464 cairo_scale(cr, x_scale, y_scale); | |
| 465 | |
| 466 cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface); | |
| 467 cairo_pattern_set_filter(pattern, CAIRO_FILTER_BEST); | |
| 468 cairo_set_source(cr, pattern); | |
| 469 cairo_pattern_destroy(pattern); | |
| 470 | |
| 471 cairo_identity_matrix(cr); | |
| 472 | |
| 473 cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height()); | |
| 474 cairo_fill(cr); | |
| 475 cairo_destroy(cr); | |
| 476 } | |
| 477 #endif | |
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Chromium Code Reviews
Issue 6532073:
Move core pieces of browser\renderer_host to src\content. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/