cc/output/software_output_device.cc

   1 // Copyright 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 "cc/output/software_output_device.h"
   6
   7 #include "base/logging.h"
   8 #include "cc/output/software_frame_data.h"
   9 #include "third_party/skia/include/core/SkCanvas.h"
  10 #include "ui/gfx/vsync_provider.h"
  11
  12 namespace cc {
  13
  14 SoftwareOutputDevice::SoftwareOutputDevice() : scale_factor_(1.f) {
  15 }
  16
  17 SoftwareOutputDevice::~SoftwareOutputDevice() {}
  18
  19 void SoftwareOutputDevice::Resize(const gfx::Size& viewport_pixel_size,
  20                                   float scale_factor) {
  21   scale_factor_ = scale_factor;
  22
  23   if (viewport_pixel_size_ == viewport_pixel_size)
  24     return;
  25
  26   SkImageInfo info = SkImageInfo::MakeN32(viewport_pixel_size.width(),
  27                                           viewport_pixel_size.height(),
  28                                           kOpaque_SkAlphaType);
  29   viewport_pixel_size_ = viewport_pixel_size;
  30   canvas_ = skia::AdoptRef(SkCanvas::NewRaster(info));
  31 }
  32
  33 SkCanvas* SoftwareOutputDevice::BeginPaint(const gfx::Rect& damage_rect) {
  34   DCHECK(canvas_);
  35   damage_rect_ = damage_rect;
  36   return canvas_.get();
  37 }
  38
  39 void SoftwareOutputDevice::EndPaint(SoftwareFrameData* frame_data) {
  40   DCHECK(frame_data);
  41   frame_data->id = 0;
  42   frame_data->size = viewport_pixel_size_;
  43   frame_data->damage_rect = damage_rect_;
  44 }
  45
  46 void SoftwareOutputDevice::CopyToPixels(const gfx::Rect& rect, void* pixels) {
  47   DCHECK(canvas_);
  48   SkImageInfo info = SkImageInfo::MakeN32Premul(rect.width(), rect.height());
  49   canvas_->readPixels(info, pixels, info.minRowBytes(), rect.x(), rect.y());
  50 }
  51
  52 void SoftwareOutputDevice::Scroll(const gfx::Vector2d& delta,
  53                                   const gfx::Rect& clip_rect) {
  54   NOTIMPLEMENTED();
  55 }
  56
  57 void SoftwareOutputDevice::ReclaimSoftwareFrame(unsigned id) {
  58   NOTIMPLEMENTED();
  59 }
  60
  61 gfx::VSyncProvider* SoftwareOutputDevice::GetVSyncProvider() {
  62   return vsync_provider_.get();
  63 }
  64
  65 }  // namespace cc