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