content/browser/renderer_host/software_output_device_x11.cc

   1 // Copyright (c) 2013 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/browser/renderer_host/software_output_device_x11.h"
   6
   7 #include <X11/Xlib.h>
   8 #include <X11/Xutil.h>
   9
  10 #include "content/public/browser/browser_thread.h"
  11 #include "third_party/skia/include/core/SkBitmap.h"
  12 #include "third_party/skia/include/core/SkDevice.h"
  13 #include "ui/compositor/compositor.h"
  14
  15 namespace content {
  16
  17 SoftwareOutputDeviceX11::SoftwareOutputDeviceX11(ui::Compositor* compositor)
  18     : compositor_(compositor),
  19       display_(ui::GetXDisplay()),
  20       gc_(NULL),
  21       image_(NULL) {
  22   // TODO(skaslev) Remove this when crbug.com/180702 is fixed.
  23   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  24
  25   gc_ = XCreateGC(display_, compositor_->widget(), 0, NULL);
  26 }
  27
  28 SoftwareOutputDeviceX11::~SoftwareOutputDeviceX11() {
  29   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  30
  31   XFreeGC(display_, gc_);
  32   ClearImage();
  33 }
  34
  35 void SoftwareOutputDeviceX11::ClearImage() {
  36   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  37
  38   if (image_) {
  39     // XDestroyImage deletes the data referenced by the image which
  40     // is actually owned by the device_. So we have to reset data here.
  41     image_->data = NULL;
  42     XDestroyImage(image_);
  43     image_ = NULL;
  44   }
  45 }
  46
  47 void SoftwareOutputDeviceX11::Resize(gfx::Size viewport_size) {
  48   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  49
  50   cc::SoftwareOutputDevice::Resize(viewport_size);
  51
  52   ClearImage();
  53   if (!device_)
  54     return;
  55
  56   const SkBitmap& bitmap = device_->accessBitmap(false);
  57   image_ = XCreateImage(display_, CopyFromParent,
  58                         DefaultDepth(display_, DefaultScreen(display_)),
  59                         ZPixmap, 0,
  60                         static_cast<char*>(bitmap.getPixels()),
  61                         viewport_size_.width(), viewport_size_.height(),
  62                         32, 4 * viewport_size_.width());
  63 }
  64
  65 void SoftwareOutputDeviceX11::EndPaint(cc::SoftwareFrameData* frame_data) {
  66   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  67   DCHECK(device_);
  68   DCHECK(frame_data);
  69
  70   if (!device_)
  71     return;
  72
  73   SoftwareOutputDevice::EndPaint(frame_data);
  74
  75   gfx::Rect rect = damage_rect_;
  76   rect.Intersect(gfx::Rect(viewport_size_));
  77   if (rect.IsEmpty())
  78     return;
  79
  80   // TODO(skaslev): Maybe switch XShmPutImage since it's async.
  81   XPutImage(display_, compositor_->widget(), gc_, image_,
  82             rect.x(), rect.y(),
  83             rect.x(), rect.y(),
  84             rect.width(), rect.height());
  85 }
  86
  87 }  // namespace content