electron/atom/browser/osr/osr_output_device.cc

88 lines
2 KiB
C++

// Copyright (c) 2016 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "atom/browser/osr/osr_output_device.h"
#include "third_party/skia/include/core/SkDevice.h"
#include "ui/gfx/skia_util.h"
namespace atom {
OffScreenOutputDevice::OffScreenOutputDevice(bool transparent,
const OnPaintCallback& callback)
: transparent_(transparent),
callback_(callback),
active_(false) {
DCHECK(!callback_.is_null());
}
OffScreenOutputDevice::~OffScreenOutputDevice() {
}
void OffScreenOutputDevice::Resize(
const gfx::Size& pixel_size, float scale_factor) {
scale_factor_ = scale_factor;
if (viewport_pixel_size_ == pixel_size) return;
viewport_pixel_size_ = pixel_size;
canvas_.reset();
bitmap_.reset(new SkBitmap);
bitmap_->allocN32Pixels(viewport_pixel_size_.width(),
viewport_pixel_size_.height(),
!transparent_);
if (bitmap_->drawsNothing()) {
NOTREACHED();
bitmap_.reset();
return;
}
if (transparent_)
bitmap_->eraseARGB(0, 0, 0, 0);
canvas_.reset(new SkCanvas(*bitmap_));
}
SkCanvas* OffScreenOutputDevice::BeginPaint(const gfx::Rect& damage_rect) {
DCHECK(canvas_.get());
DCHECK(bitmap_.get());
damage_rect_ = damage_rect;
return canvas_.get();
}
void OffScreenOutputDevice::EndPaint() {
DCHECK(canvas_.get());
DCHECK(bitmap_.get());
if (!bitmap_.get()) return;
cc::SoftwareOutputDevice::EndPaint();
if (active_)
OnPaint(damage_rect_);
}
void OffScreenOutputDevice::SetActive(bool active) {
if (active == active_)
return;
active_ = active;
if (active_)
OnPaint(gfx::Rect(viewport_pixel_size_));
}
void OffScreenOutputDevice::OnPaint(const gfx::Rect& damage_rect) {
gfx::Rect rect = damage_rect;
rect.Intersect(gfx::Rect(viewport_pixel_size_));
if (rect.IsEmpty())
return;
SkAutoLockPixels bitmap_pixels_lock(*bitmap_);
callback_.Run(rect, *bitmap_);
}
} // namespace atom