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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/snapshot/snapshot_async.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/numerics/safe_conversions.h"
#include "base/task_runner_util.h"
#include "skia/ext/image_operations.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/skbitmap_operations.h"
namespace ui {
namespace {
void OnFrameScalingFinished(const GrabWindowSnapshotAsyncCallback& callback,
const SkBitmap& scaled_bitmap) {
callback.Run(gfx::Image(gfx::ImageSkia::CreateFrom1xBitmap(scaled_bitmap)));
}
SkBitmap ScaleBitmap(const SkBitmap& input_bitmap,
const gfx::Size& target_size) {
return skia::ImageOperations::Resize(input_bitmap,
skia::ImageOperations::RESIZE_GOOD,
target_size.width(),
target_size.height(),
static_cast<SkBitmap::Allocator*>(NULL));
}
} // namespace
void SnapshotAsync::ScaleCopyOutputResult(
const GrabWindowSnapshotAsyncCallback& callback,
const gfx::Size& target_size,
scoped_refptr<base::TaskRunner> background_task_runner,
std::unique_ptr<cc::CopyOutputResult> result) {
if (result->IsEmpty()) {
callback.Run(gfx::Image());
return;
}
// TODO(sergeyu): Potentially images can be scaled on GPU before reading it
// from GPU. Image scaling is implemented in content::GlHelper, but it's can't
// be used here because it's not in content/public. Move the scaling code
// somewhere so that it can be reused here.
base::PostTaskAndReplyWithResult(
background_task_runner.get(),
FROM_HERE,
base::Bind(ScaleBitmap, *result->TakeBitmap(), target_size),
base::Bind(&OnFrameScalingFinished, callback));
}
void SnapshotAsync::RunCallbackWithCopyOutputResult(
const GrabWindowSnapshotAsyncCallback& callback,
std::unique_ptr<cc::CopyOutputResult> result) {
if (result->IsEmpty()) {
callback.Run(gfx::Image());
return;
}
callback.Run(gfx::Image::CreateFrom1xBitmap(*result->TakeBitmap()));
}
} // namespace ui
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