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