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1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/snapshot/snapshot.h"
6
7#import <Cocoa/Cocoa.h>
8
9#include "base/mac/scoped_nsobject.h"
10#include "base/mac/sdk_forward_declarations.h"
11#include "base/memory/scoped_ptr.h"
12#include "testing/platform_test.h"
13#include "ui/gfx/rect.h"
14
15namespace ui {
16namespace {
17
18typedef PlatformTest GrabWindowSnapshotTest;
19
20TEST_F(GrabWindowSnapshotTest, TestGrabWindowSnapshot) {
21  // Launch a test window so we can take a snapshot.
22  NSRect frame = NSMakeRect(0, 0, 400, 400);
23  base::scoped_nsobject<NSWindow> window(
24      [[NSWindow alloc] initWithContentRect:frame
25                                  styleMask:NSBorderlessWindowMask
26                                    backing:NSBackingStoreBuffered
27                                      defer:NO]);
28  [window setBackgroundColor:[NSColor whiteColor]];
29  [window makeKeyAndOrderFront:NSApp];
30
31  scoped_ptr<std::vector<unsigned char> > png_representation(
32      new std::vector<unsigned char>);
33  gfx::Rect bounds = gfx::Rect(0, 0, frame.size.width, frame.size.height);
34  EXPECT_TRUE(ui::GrabWindowSnapshot(window, png_representation.get(),
35                                           bounds));
36
37  // Copy png back into NSData object so we can make sure we grabbed a png.
38  base::scoped_nsobject<NSData> image_data(
39      [[NSData alloc] initWithBytes:&(*png_representation)[0]
40                             length:png_representation->size()]);
41  NSBitmapImageRep* rep = [NSBitmapImageRep imageRepWithData:image_data.get()];
42  EXPECT_TRUE([rep isKindOfClass:[NSBitmapImageRep class]]);
43  CGFloat scaleFactor = 1.0f;
44  if ([window respondsToSelector:@selector(backingScaleFactor)])
45    scaleFactor = [window backingScaleFactor];
46  EXPECT_EQ(400 * scaleFactor, CGImageGetWidth([rep CGImage]));
47  NSColor* color = [rep colorAtX:200 * scaleFactor y:200 * scaleFactor];
48  CGFloat red = 0, green = 0, blue = 0, alpha = 0;
49  [color getRed:&red green:&green blue:&blue alpha:&alpha];
50  EXPECT_GE(red + green + blue, 3.0);
51}
52
53}  // namespace
54}  // namespace ui
55