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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 "ui/snapshot/snapshot.h"
#import <Cocoa/Cocoa.h>
#include "base/callback.h"
#include "base/logging.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/scoped_nsobject.h"
#include "base/task_runner.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/image/image.h"
namespace ui {
bool GrabViewSnapshot(gfx::NativeView view,
std::vector<unsigned char>* png_representation,
const gfx::Rect& snapshot_bounds) {
NSWindow* window = [view window];
NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
gfx::Rect screen_bounds = gfx::Rect(NSRectToCGRect([screen frame]));
// Get the view bounds relative to the screen
NSRect frame = [view convertRect:[view bounds] toView:nil];
frame.origin = [window convertBaseToScreen:frame.origin];
gfx::Rect view_bounds = gfx::Rect(NSRectToCGRect(frame));
// Flip window coordinates based on the primary screen.
view_bounds.set_y(
screen_bounds.height() - view_bounds.y() - view_bounds.height());
// Convert snapshot bounds relative to window into bounds relative to
// screen.
gfx::Rect screen_snapshot_bounds = snapshot_bounds;
screen_snapshot_bounds.Offset(view_bounds.OffsetFromOrigin());
DCHECK_LE(screen_snapshot_bounds.right(), view_bounds.right());
DCHECK_LE(screen_snapshot_bounds.bottom(), view_bounds.bottom());
png_representation->clear();
base::ScopedCFTypeRef<CGImageRef> windowSnapshot(
CGWindowListCreateImage(screen_snapshot_bounds.ToCGRect(),
kCGWindowListOptionIncludingWindow,
[window windowNumber],
kCGWindowImageBoundsIgnoreFraming));
if (CGImageGetWidth(windowSnapshot) <= 0)
return false;
base::scoped_nsobject<NSBitmapImageRep> rep(
[[NSBitmapImageRep alloc] initWithCGImage:windowSnapshot]);
NSData* data = [rep representationUsingType:NSPNGFileType properties:nil];
const unsigned char* buf = static_cast<const unsigned char*>([data bytes]);
NSUInteger length = [data length];
if (buf == NULL || length == 0)
return false;
png_representation->assign(buf, buf + length);
DCHECK(!png_representation->empty());
return true;
}
bool GrabWindowSnapshot(gfx::NativeWindow window,
std::vector<unsigned char>* png_representation,
const gfx::Rect& snapshot_bounds) {
// Make sure to grab the "window frame" view so we get current tab +
// tabstrip.
return GrabViewSnapshot([[window contentView] superview], png_representation,
snapshot_bounds);
}
void GrabWindowSnapshotAndScaleAsync(
gfx::NativeWindow window,
const gfx::Rect& snapshot_bounds,
const gfx::Size& target_size,
scoped_refptr<base::TaskRunner> background_task_runner,
GrabWindowSnapshotAsyncCallback callback) {
callback.Run(gfx::Image());
}
void GrabViewSnapshotAsync(
gfx::NativeView view,
const gfx::Rect& source_rect,
scoped_refptr<base::TaskRunner> background_task_runner,
const GrabWindowSnapshotAsyncPNGCallback& callback) {
callback.Run(scoped_refptr<base::RefCountedBytes>());
}
void GrabWindowSnapshotAsync(
gfx::NativeWindow window,
const gfx::Rect& source_rect,
scoped_refptr<base::TaskRunner> background_task_runner,
const GrabWindowSnapshotAsyncPNGCallback& callback) {
return GrabViewSnapshotAsync([[window contentView] superview], source_rect,
background_task_runner, callback);
}
} // namespace ui
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