ui/ozone/platform/dri/dri_surface.cc

   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 "ui/ozone/platform/dri/dri_surface.h"
   6
   7 #include "base/logging.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "third_party/skia/include/core/SkCanvas.h"
  10 #include "third_party/skia/include/core/SkSurface.h"
  11 #include "ui/gfx/geometry/rect.h"
  12 #include "ui/gfx/skia_util.h"
  13 #include "ui/ozone/platform/dri/dri_buffer.h"
  14 #include "ui/ozone/platform/dri/dri_vsync_provider.h"
  15 #include "ui/ozone/platform/dri/dri_window_delegate_impl.h"
  16 #include "ui/ozone/platform/dri/dri_wrapper.h"
  17 #include "ui/ozone/platform/dri/hardware_display_controller.h"
  18
  19 namespace ui {
  20
  21 namespace {
  22
  23 scoped_refptr<DriBuffer> AllocateBuffer(DriWrapper* dri,
  24                                         const gfx::Size& size) {
  25   scoped_refptr<DriBuffer> buffer(new DriBuffer(dri));
  26   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
  27
  28   bool initialized = buffer->Initialize(info);
  29   DCHECK(initialized) << "Failed to create drm buffer.";
  30
  31   return buffer;
  32 }
  33
  34 }  // namespace
  35
  36 DriSurface::DriSurface(DriWindowDelegate* window_delegate, DriWrapper* dri)
  37     : window_delegate_(window_delegate),
  38       dri_(dri),
  39       buffers_(),
  40       front_buffer_(0) {
  41 }
  42
  43 DriSurface::~DriSurface() {
  44 }
  45
  46 skia::RefPtr<SkCanvas> DriSurface::GetCanvas() {
  47   return skia::SharePtr(surface_->getCanvas());
  48 }
  49
  50 void DriSurface::ResizeCanvas(const gfx::Size& viewport_size) {
  51   SkImageInfo info = SkImageInfo::MakeN32(
  52       viewport_size.width(), viewport_size.height(), kOpaque_SkAlphaType);
  53   surface_ = skia::AdoptRef(SkSurface::NewRaster(info));
  54
  55   HardwareDisplayController* controller = window_delegate_->GetController();
  56   if (!controller)
  57     return;
  58
  59   // For the display buffers use the mode size since a |viewport_size| smaller
  60   // than the display size will not scanout.
  61   for (size_t i = 0; i < arraysize(buffers_); ++i)
  62     buffers_[i] = AllocateBuffer(dri_, controller->GetModeSize());
  63 }
  64
  65 void DriSurface::PresentCanvas(const gfx::Rect& damage) {
  66   DCHECK(base::MessageLoopForUI::IsCurrent());
  67   DCHECK(buffers_[front_buffer_ ^ 1].get());
  68
  69   HardwareDisplayController* controller = window_delegate_->GetController();
  70   if (!controller)
  71     return;
  72
  73   controller->QueueOverlayPlane(OverlayPlane(buffers_[front_buffer_ ^ 1]));
  74
  75   UpdateNativeSurface(damage);
  76   controller->SchedulePageFlip();
  77   controller->WaitForPageFlipEvent();
  78
  79   // Update our front buffer pointer.
  80   front_buffer_ ^= 1;
  81 }
  82
  83 scoped_ptr<gfx::VSyncProvider> DriSurface::CreateVSyncProvider() {
  84   return scoped_ptr<gfx::VSyncProvider>(new DriVSyncProvider(window_delegate_));
  85 }
  86
  87 void DriSurface::UpdateNativeSurface(const gfx::Rect& damage) {
  88   SkCanvas* canvas = buffers_[front_buffer_ ^ 1]->GetCanvas();
  89
  90   // The DriSurface is double buffered, so the current back buffer is
  91   // missing the previous update. Expand damage region.
  92   SkRect real_damage = RectToSkRect(UnionRects(damage, last_damage_));
  93
  94   // Copy damage region.
  95   skia::RefPtr<SkImage> image = skia::AdoptRef(surface_->newImageSnapshot());
  96   canvas->drawImageRect(image.get(), &real_damage, real_damage, NULL);
  97
  98   last_damage_ = damage;
  99 }
 100
 101 }  // namespace ui