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// Copyright (c) 2012 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 "chrome/browser/ui/window_snapshot/window_snapshot.h"
#include "base/logging.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/aura/window.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/dip_util.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/rect.h"
namespace browser {
bool GrabWindowSnapshot(gfx::NativeWindow window,
std::vector<unsigned char>* png_representation,
const gfx::Rect& snapshot_bounds) {
ui::Compositor* compositor = window->layer()->GetCompositor();
gfx::Rect read_pixels_bounds = snapshot_bounds;
// When not in compact mode we must take into account the window's position on
// the desktop.
read_pixels_bounds.set_origin(
snapshot_bounds.origin().Add(window->bounds().origin()));
gfx::Rect read_pixels_bounds_in_pixel =
ui::ConvertRectToPixel(window->layer(), read_pixels_bounds);
DCHECK_GE(compositor->size().width(), read_pixels_bounds_in_pixel.right());
DCHECK_GE(compositor->size().height(), read_pixels_bounds_in_pixel.bottom());
DCHECK_LE(0, read_pixels_bounds.x());
DCHECK_LE(0, read_pixels_bounds.y());
SkBitmap bitmap;
if (!compositor->ReadPixels(&bitmap, read_pixels_bounds_in_pixel))
return false;
unsigned char* pixels = reinterpret_cast<unsigned char*>(bitmap.getPixels());
gfx::PNGCodec::Encode(pixels, gfx::PNGCodec::FORMAT_BGRA,
read_pixels_bounds_in_pixel.size(),
bitmap.rowBytes(), true,
std::vector<gfx::PNGCodec::Comment>(),
png_representation);
return true;
}
} // namespace browser
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