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
  24 scoped_refptr<DrmBuffer> AllocateBuffer(const scoped_refptr<DrmDevice>& drm,
  25                                         const gfx::Size& size) {
  26   scoped_refptr<DrmBuffer> buffer(new DrmBuffer(drm));
  27   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
  28
  29   bool initialized =
  30       buffer->Initialize(info, true /* should_register_framebuffer */);
  31   DCHECK(initialized) << "Failed to create drm buffer.";
  32
  33   return buffer;
  34 }
  35
  36 }  // namespace
  37
  38 DrmSurface::DrmSurface(DrmWindow* window_delegate)
  39     : window_delegate_(window_delegate), buffers_(), front_buffer_(0) {
  40 }
  41
  42 DrmSurface::~DrmSurface() {
  43 }
  44
  45 skia::RefPtr<SkSurface> DrmSurface::GetSurface() {
  46   return surface_;
  47 }
  48
  49 void DrmSurface::ResizeCanvas(const gfx::Size& viewport_size) {
  50   SkImageInfo info = SkImageInfo::MakeN32(
  51       viewport_size.width(), viewport_size.height(), kOpaque_SkAlphaType);
  52   surface_ = skia::AdoptRef(SkSurface::NewRaster(info));
  53
  54   HardwareDisplayController* controller = window_delegate_->GetController();
  55   if (!controller)
  56     return;
  57
  58   // For the display buffers use the mode size since a |viewport_size| smaller
  59   // than the display size will not scanout.
  60   for (size_t i = 0; i < arraysize(buffers_); ++i)
  61     buffers_[i] = AllocateBuffer(controller->GetAllocationDrmDevice(),
  62                                  controller->GetModeSize());
  63 }
  64
  65 void DrmSurface::PresentCanvas(const gfx::Rect& damage) {
  66   DCHECK(base::MessageLoopForUI::IsCurrent());
  67
  68   HardwareDisplayController* controller = window_delegate_->GetController();
  69   if (!controller)
  70     return;
  71
  72   DCHECK(buffers_[front_buffer_ ^ 1].get());
  73   controller->QueueOverlayPlane(OverlayPlane(buffers_[front_buffer_ ^ 1]));
  74
  75   UpdateNativeSurface(damage);
  76   controller->SchedulePageFlip(false /* is_sync */,
  77                                base::Bind(&base::DoNothing));
  78
  79   // Update our front buffer pointer.
  80   front_buffer_ ^= 1;
  81 }
  82
  83 scoped_ptr<gfx::VSyncProvider> DrmSurface::CreateVSyncProvider() {
  84   return make_scoped_ptr(new DrmVSyncProvider(window_delegate_));
  85 }
  86
  87 void DrmSurface::UpdateNativeSurface(const gfx::Rect& damage) {
  88   SkCanvas* canvas = buffers_[front_buffer_ ^ 1]->GetCanvas();
  89
  90   // The DrmSurface 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