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