Tools/TestWebKitAPI/Tests/WebKitCocoa/WKWebViewSnapshot.mm - WebKit - Git at Google

 /*
  * Copyright (C) 2016 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 #import "config.h"

 #import "PlatformUtilities.h"
 #import "Test.h"
 #import "TestNavigationDelegate.h"
 #import <WebKit/WKSnapshotConfiguration.h>
 #import <wtf/RetainPtr.h>

 static bool isDone;

 #if PLATFORM(MAC)
 typedef NSImage *PlatformImage;
 typedef NSWindow *PlatformWindow;

 static RetainPtr<CGImageRef> convertToCGImage(NSImage *image)
 {
     return [image CGImageForProposedRect:nil context:nil hints:nil];
 }

 #else
 typedef UIImage *PlatformImage;
 typedef UIWindow *PlatformWindow;

 static RetainPtr<CGImageRef> convertToCGImage(UIImage *image)
 {
     return image.CGImage;
 }
 #endif

 static NSInteger getPixelIndex(NSInteger x, NSInteger y, NSInteger width)
 {
     return (y * width + x) * 4;
 }

 TEST(WKWebView, SnapshotImageError)
 {
     CGFloat viewWidth = 800;
     CGFloat viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     [webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];
     [webView _killWebContentProcessAndResetState];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
     [snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
     [snapshotConfiguration setSnapshotWidth:@(viewWidth)];

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(snapshotImage);
         EXPECT_WK_STREQ(@"WKErrorDomain", error.domain);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotImageBaseCase)
 {
     NSInteger viewWidth = 800;
     NSInteger viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     RetainPtr<PlatformWindow> window;
     CGFloat backingScaleFactor;

 #if PLATFORM(MAC)
     window = adoptNS([[NSWindow alloc] initWithContentRect:[webView frame] styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO]);
     [[window contentView] addSubview:webView.get()];
     backingScaleFactor = [window backingScaleFactor];
 #elif PLATFORM(IOS_FAMILY)
     window = adoptNS([[UIWindow alloc] initWithFrame:[webView frame]]);
     [window addSubview:webView.get()];
     backingScaleFactor = [[window screen] scale];
 #endif

     [webView loadHTMLString:@"<body style='background-color:red;'><div style='background-color:blue; position:absolute; width:100px; height:100px; top:50px; left:50px'></div></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
     [snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
     [snapshotConfiguration setSnapshotWidth:@(viewWidth)];

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);

         EXPECT_EQ(viewWidth, snapshotImage.size.width);

         RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
         RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

         NSInteger viewWidthInPixels = viewWidth * backingScaleFactor;
         NSInteger viewHeightInPixels = viewHeight * backingScaleFactor;

         uint8_t *rgba = (unsigned char *)calloc(viewWidthInPixels * viewHeightInPixels * 4, sizeof(unsigned char));
         RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
         CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidthInPixels, viewHeightInPixels), cgImage.get());

         NSInteger pixelIndex = getPixelIndex(0, 0, viewWidthInPixels);
         EXPECT_EQ(255, rgba[pixelIndex]);
         EXPECT_EQ(0, rgba[pixelIndex + 1]);
         EXPECT_EQ(0, rgba[pixelIndex + 2]);

         // Inside the blue div (50, 50, 100, 100)
         pixelIndex = getPixelIndex(55 * backingScaleFactor, 55 * backingScaleFactor, viewWidthInPixels);
         EXPECT_EQ(0, rgba[pixelIndex]);
         EXPECT_EQ(0, rgba[pixelIndex + 1]);
         EXPECT_EQ(255, rgba[pixelIndex + 2]);

         pixelIndex = getPixelIndex(155 * backingScaleFactor, 155 * backingScaleFactor, viewWidthInPixels);
         EXPECT_EQ(255, rgba[pixelIndex]);
         EXPECT_EQ(0, rgba[pixelIndex + 1]);
         EXPECT_EQ(0, rgba[pixelIndex + 2]);

         free(rgba);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotImageScale)
 {
     CGFloat viewWidth = 800;
     CGFloat viewHeight = 600;
     CGFloat scaleFactor = 2;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     [webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
     [snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
     [snapshotConfiguration setSnapshotWidth:@(viewWidth * scaleFactor)];

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);
         EXPECT_NOT_NULL(snapshotImage);
         EXPECT_EQ(viewWidth * scaleFactor, snapshotImage.size.width);
         EXPECT_EQ(viewHeight * scaleFactor, snapshotImage.size.height);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotImageNilConfiguration)
 {
     CGFloat viewWidth = 800;
     CGFloat viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     [webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];

     isDone = false;
     [webView takeSnapshotWithConfiguration:nil completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);
         EXPECT_NOT_NULL(snapshotImage);
         EXPECT_EQ([webView bounds].size.width, snapshotImage.size.width);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotImageUninitializedConfiguration)
 {
     CGFloat viewWidth = 800;
     CGFloat viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     [webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);
         EXPECT_NOT_NULL(snapshotImage);
         EXPECT_EQ([webView bounds].size.width, snapshotImage.size.width);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotImageUninitializedSnapshotWidth)
 {
     CGFloat viewWidth = 800;
     CGFloat viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     [webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
     [snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);
         EXPECT_NOT_NULL(snapshotImage);
         EXPECT_EQ([snapshotConfiguration rect].size.width, snapshotImage.size.width);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotImageLargeAsyncDecoding)
 {
     NSInteger viewWidth = 800;
     NSInteger viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"large-red-square-image" withExtension:@"html" subdirectory:@"TestWebKitAPI.resources"];
     [webView loadFileURL:fileURL allowingReadAccessToURL:fileURL];
     [webView _test_waitForDidFinishNavigation];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
     [snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
     [snapshotConfiguration setSnapshotWidth:@(viewWidth)];

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);

         EXPECT_EQ(viewWidth, snapshotImage.size.width);

         RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
         RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

         uint8_t *rgba = (unsigned char *)calloc(viewWidth * viewHeight * 4, sizeof(unsigned char));
         RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidth, viewHeight, 8, 4 * viewWidth, colorSpace.get(), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
         CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidth, viewHeight), cgImage.get());

         // Top-left corner of the div (0, 0, 100, 100)
         NSInteger pixelIndex = getPixelIndex(0, 0, viewWidth);
         EXPECT_EQ(255, rgba[pixelIndex]);
         EXPECT_EQ(0, rgba[pixelIndex + 1]);
         EXPECT_EQ(0, rgba[pixelIndex + 2]);

         // Right-bottom corner of the div (0, 0, 100, 100)
         pixelIndex = getPixelIndex(99, 99, viewWidth);
         EXPECT_EQ(255, rgba[pixelIndex]);
         EXPECT_EQ(0, rgba[pixelIndex + 1]);
         EXPECT_EQ(0, rgba[pixelIndex + 2]);

         // Outside the div (0, 0, 100, 100)
         pixelIndex = getPixelIndex(100, 100, viewWidth);
         EXPECT_EQ(255, rgba[pixelIndex]);
         EXPECT_EQ(255, rgba[pixelIndex + 1]);
         EXPECT_EQ(255, rgba[pixelIndex + 2]);

         free(rgba);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotAfterScreenUpdates)
 {
     // The API tests currently cannot truly test SnapshotConfiguration.afterScreenUpdates since it is only needed
     // on iOS devices, and we do not currently run API tests on iOS devices. So we expect this test to pass with
     // afterScreenUpdates set to YES or NO on the configuration. On device, afterScreenUpdates must be YES in order
     // pass this test.
     NSInteger viewWidth = 800;
     NSInteger viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     RetainPtr<PlatformWindow> window;
     CGFloat backingScaleFactor;

 #if PLATFORM(MAC)
     window = adoptNS([[NSWindow alloc] initWithContentRect:[webView frame] styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO]);
     [[window contentView] addSubview:webView.get()];
     backingScaleFactor = [window backingScaleFactor];
 #elif PLATFORM(IOS_FAMILY)
     window = adoptNS([[UIWindow alloc] initWithFrame:[webView frame]]);
     [window addSubview:webView.get()];
     backingScaleFactor = [[window screen] scale];
 #endif

     [webView loadHTMLString:@"<body style='margin:0'><div id='change-me' style='background-color:red; position:fixed; width:100%; height:100%'></div></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
     [snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
     [snapshotConfiguration setSnapshotWidth:@(viewWidth)];
     [snapshotConfiguration setAfterScreenUpdates:YES];

     [webView evaluateJavaScript:@"var div = document.getElementById('change-me');div.style.backgroundColor = 'blue';" completionHandler:nil];

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);

         EXPECT_EQ(viewWidth, snapshotImage.size.width);

         RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
         RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

         NSInteger viewWidthInPixels = viewWidth * backingScaleFactor;
         NSInteger viewHeightInPixels = viewHeight * backingScaleFactor;

         uint8_t *rgba = (unsigned char *)calloc(viewWidthInPixels * viewHeightInPixels * 4, sizeof(unsigned char));
         RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
         CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidthInPixels, viewHeightInPixels), cgImage.get());

         NSInteger pixelIndex = getPixelIndex(0, 0, viewWidthInPixels);
         EXPECT_EQ(0, rgba[pixelIndex]);
         EXPECT_EQ(0, rgba[pixelIndex + 1]);
         EXPECT_EQ(255, rgba[pixelIndex + 2]);

         free(rgba);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }

 TEST(WKWebView, SnapshotWithoutAfterScreenUpdates)
 {
     // SnapshotConfiguration.afterScreenUpdates tests currently cannot truly test this API since it is only needed
     // on iOS devices, and we do not currently run API tests on iOS devices. The expectations below are based on
     // what we expect in the simulator and on macOS, which is that setting afterScreenUpdates to NO will still
     // result in a snapshot that includes the recent screen updates. If we get these tests running on iOS device,
     // then we would expect the pixels to be red instead of blue.
     NSInteger viewWidth = 800;
     NSInteger viewHeight = 600;
     RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

     RetainPtr<PlatformWindow> window;
     CGFloat backingScaleFactor;

 #if PLATFORM(MAC)
     window = adoptNS([[NSWindow alloc] initWithContentRect:[webView frame] styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO]);
     [[window contentView] addSubview:webView.get()];
     backingScaleFactor = [window backingScaleFactor];
 #elif PLATFORM(IOS_FAMILY)
     window = adoptNS([[UIWindow alloc] initWithFrame:[webView frame]]);
     [window addSubview:webView.get()];
     backingScaleFactor = [[window screen] scale];
 #endif

     [webView loadHTMLString:@"<body style='margin:0'><div id='change-me' style='background-color:red; position:fixed; width:100%; height:100%'></div></body>" baseURL:nil];
     [webView _test_waitForDidFinishNavigation];

     RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
     [snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
     [snapshotConfiguration setSnapshotWidth:@(viewWidth)];
     [snapshotConfiguration setAfterScreenUpdates:NO];

     [webView evaluateJavaScript:@"var div = document.getElementById('change-me');div.style.backgroundColor = 'blue';" completionHandler:nil];

     isDone = false;
     [webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
         EXPECT_NULL(error);

         EXPECT_EQ(viewWidth, snapshotImage.size.width);

         RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
         RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

         NSInteger viewWidthInPixels = viewWidth * backingScaleFactor;
         NSInteger viewHeightInPixels = viewHeight * backingScaleFactor;

         uint8_t *rgba = (unsigned char *)calloc(viewWidthInPixels * viewHeightInPixels * 4, sizeof(unsigned char));
         RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
         CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidthInPixels, viewHeightInPixels), cgImage.get());

         NSInteger pixelIndex = getPixelIndex(0, 0, viewWidthInPixels);
         EXPECT_EQ(0, rgba[pixelIndex]);
         EXPECT_EQ(0, rgba[pixelIndex + 1]);
         EXPECT_EQ(255, rgba[pixelIndex + 2]);

         free(rgba);

         isDone = true;
     }];

     TestWebKitAPI::Util::run(&isDone);
 }
	/*
	* Copyright (C) 2016 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#import "config.h"

	#import "PlatformUtilities.h"
	#import "Test.h"
	#import "TestNavigationDelegate.h"
	#import <WebKit/WKSnapshotConfiguration.h>
	#import <wtf/RetainPtr.h>

	static bool isDone;

	#if PLATFORM(MAC)
	typedef NSImage *PlatformImage;
	typedef NSWindow *PlatformWindow;

	static RetainPtr<CGImageRef> convertToCGImage(NSImage *image)
	{
	return [image CGImageForProposedRect:nil context:nil hints:nil];
	}

	#else
	typedef UIImage *PlatformImage;
	typedef UIWindow *PlatformWindow;

	static RetainPtr<CGImageRef> convertToCGImage(UIImage *image)
	{
	return image.CGImage;
	}
	#endif

	static NSInteger getPixelIndex(NSInteger x, NSInteger y, NSInteger width)
	{
	return (y * width + x) * 4;
	}

	TEST(WKWebView, SnapshotImageError)
	{
	CGFloat viewWidth = 800;
	CGFloat viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	[webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];
	[webView _killWebContentProcessAndResetState];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
	[snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
	[snapshotConfiguration setSnapshotWidth:@(viewWidth)];

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(snapshotImage);
	EXPECT_WK_STREQ(@"WKErrorDomain", error.domain);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotImageBaseCase)
	{
	NSInteger viewWidth = 800;
	NSInteger viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	RetainPtr<PlatformWindow> window;
	CGFloat backingScaleFactor;

	#if PLATFORM(MAC)
	window = adoptNS([[NSWindow alloc] initWithContentRect:[webView frame] styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO]);
	[[window contentView] addSubview:webView.get()];
	backingScaleFactor = [window backingScaleFactor];
	#elif PLATFORM(IOS_FAMILY)
	window = adoptNS([[UIWindow alloc] initWithFrame:[webView frame]]);
	[window addSubview:webView.get()];
	backingScaleFactor = [[window screen] scale];
	#endif

	[webView loadHTMLString:@"<body style='background-color:red;'><div style='background-color:blue; position:absolute; width:100px; height:100px; top:50px; left:50px'></div></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
	[snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
	[snapshotConfiguration setSnapshotWidth:@(viewWidth)];

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);

	EXPECT_EQ(viewWidth, snapshotImage.size.width);

	RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
	RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

	NSInteger viewWidthInPixels = viewWidth * backingScaleFactor;
	NSInteger viewHeightInPixels = viewHeight * backingScaleFactor;

	uint8_t rgba = (unsigned char )calloc(viewWidthInPixels * viewHeightInPixels * 4, sizeof(unsigned char));
	RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast \| kCGBitmapByteOrder32Big);
	CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidthInPixels, viewHeightInPixels), cgImage.get());

	NSInteger pixelIndex = getPixelIndex(0, 0, viewWidthInPixels);
	EXPECT_EQ(255, rgba[pixelIndex]);
	EXPECT_EQ(0, rgba[pixelIndex + 1]);
	EXPECT_EQ(0, rgba[pixelIndex + 2]);

	// Inside the blue div (50, 50, 100, 100)
	pixelIndex = getPixelIndex(55 * backingScaleFactor, 55 * backingScaleFactor, viewWidthInPixels);
	EXPECT_EQ(0, rgba[pixelIndex]);
	EXPECT_EQ(0, rgba[pixelIndex + 1]);
	EXPECT_EQ(255, rgba[pixelIndex + 2]);

	pixelIndex = getPixelIndex(155 * backingScaleFactor, 155 * backingScaleFactor, viewWidthInPixels);
	EXPECT_EQ(255, rgba[pixelIndex]);
	EXPECT_EQ(0, rgba[pixelIndex + 1]);
	EXPECT_EQ(0, rgba[pixelIndex + 2]);

	free(rgba);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotImageScale)
	{
	CGFloat viewWidth = 800;
	CGFloat viewHeight = 600;
	CGFloat scaleFactor = 2;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	[webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
	[snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
	[snapshotConfiguration setSnapshotWidth:@(viewWidth * scaleFactor)];

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);
	EXPECT_NOT_NULL(snapshotImage);
	EXPECT_EQ(viewWidth * scaleFactor, snapshotImage.size.width);
	EXPECT_EQ(viewHeight * scaleFactor, snapshotImage.size.height);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotImageNilConfiguration)
	{
	CGFloat viewWidth = 800;
	CGFloat viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	[webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];

	isDone = false;
	[webView takeSnapshotWithConfiguration:nil completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);
	EXPECT_NOT_NULL(snapshotImage);
	EXPECT_EQ([webView bounds].size.width, snapshotImage.size.width);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotImageUninitializedConfiguration)
	{
	CGFloat viewWidth = 800;
	CGFloat viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	[webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);
	EXPECT_NOT_NULL(snapshotImage);
	EXPECT_EQ([webView bounds].size.width, snapshotImage.size.width);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotImageUninitializedSnapshotWidth)
	{
	CGFloat viewWidth = 800;
	CGFloat viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	[webView loadHTMLString:@"<body style='background-color: red;'></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
	[snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);
	EXPECT_NOT_NULL(snapshotImage);
	EXPECT_EQ([snapshotConfiguration rect].size.width, snapshotImage.size.width);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotImageLargeAsyncDecoding)
	{
	NSInteger viewWidth = 800;
	NSInteger viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"large-red-square-image" withExtension:@"html" subdirectory:@"TestWebKitAPI.resources"];
	[webView loadFileURL:fileURL allowingReadAccessToURL:fileURL];
	[webView _test_waitForDidFinishNavigation];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
	[snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
	[snapshotConfiguration setSnapshotWidth:@(viewWidth)];

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);

	EXPECT_EQ(viewWidth, snapshotImage.size.width);

	RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
	RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

	uint8_t rgba = (unsigned char )calloc(viewWidth * viewHeight * 4, sizeof(unsigned char));
	RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidth, viewHeight, 8, 4 * viewWidth, colorSpace.get(), kCGImageAlphaPremultipliedLast \| kCGBitmapByteOrder32Big);
	CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidth, viewHeight), cgImage.get());

	// Top-left corner of the div (0, 0, 100, 100)
	NSInteger pixelIndex = getPixelIndex(0, 0, viewWidth);
	EXPECT_EQ(255, rgba[pixelIndex]);
	EXPECT_EQ(0, rgba[pixelIndex + 1]);
	EXPECT_EQ(0, rgba[pixelIndex + 2]);

	// Right-bottom corner of the div (0, 0, 100, 100)
	pixelIndex = getPixelIndex(99, 99, viewWidth);
	EXPECT_EQ(255, rgba[pixelIndex]);
	EXPECT_EQ(0, rgba[pixelIndex + 1]);
	EXPECT_EQ(0, rgba[pixelIndex + 2]);

	// Outside the div (0, 0, 100, 100)
	pixelIndex = getPixelIndex(100, 100, viewWidth);
	EXPECT_EQ(255, rgba[pixelIndex]);
	EXPECT_EQ(255, rgba[pixelIndex + 1]);
	EXPECT_EQ(255, rgba[pixelIndex + 2]);

	free(rgba);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotAfterScreenUpdates)
	{
	// The API tests currently cannot truly test SnapshotConfiguration.afterScreenUpdates since it is only needed
	// on iOS devices, and we do not currently run API tests on iOS devices. So we expect this test to pass with
	// afterScreenUpdates set to YES or NO on the configuration. On device, afterScreenUpdates must be YES in order
	// pass this test.
	NSInteger viewWidth = 800;
	NSInteger viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	RetainPtr<PlatformWindow> window;
	CGFloat backingScaleFactor;

	#if PLATFORM(MAC)
	window = adoptNS([[NSWindow alloc] initWithContentRect:[webView frame] styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO]);
	[[window contentView] addSubview:webView.get()];
	backingScaleFactor = [window backingScaleFactor];
	#elif PLATFORM(IOS_FAMILY)
	window = adoptNS([[UIWindow alloc] initWithFrame:[webView frame]]);
	[window addSubview:webView.get()];
	backingScaleFactor = [[window screen] scale];
	#endif

	[webView loadHTMLString:@"<body style='margin:0'><div id='change-me' style='background-color:red; position:fixed; width:100%; height:100%'></div></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
	[snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
	[snapshotConfiguration setSnapshotWidth:@(viewWidth)];
	[snapshotConfiguration setAfterScreenUpdates:YES];

	[webView evaluateJavaScript:@"var div = document.getElementById('change-me');div.style.backgroundColor = 'blue';" completionHandler:nil];

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);

	EXPECT_EQ(viewWidth, snapshotImage.size.width);

	RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
	RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

	NSInteger viewWidthInPixels = viewWidth * backingScaleFactor;
	NSInteger viewHeightInPixels = viewHeight * backingScaleFactor;

	uint8_t rgba = (unsigned char )calloc(viewWidthInPixels * viewHeightInPixels * 4, sizeof(unsigned char));
	RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast \| kCGBitmapByteOrder32Big);
	CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidthInPixels, viewHeightInPixels), cgImage.get());

	NSInteger pixelIndex = getPixelIndex(0, 0, viewWidthInPixels);
	EXPECT_EQ(0, rgba[pixelIndex]);
	EXPECT_EQ(0, rgba[pixelIndex + 1]);
	EXPECT_EQ(255, rgba[pixelIndex + 2]);

	free(rgba);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}

	TEST(WKWebView, SnapshotWithoutAfterScreenUpdates)
	{
	// SnapshotConfiguration.afterScreenUpdates tests currently cannot truly test this API since it is only needed
	// on iOS devices, and we do not currently run API tests on iOS devices. The expectations below are based on
	// what we expect in the simulator and on macOS, which is that setting afterScreenUpdates to NO will still
	// result in a snapshot that includes the recent screen updates. If we get these tests running on iOS device,
	// then we would expect the pixels to be red instead of blue.
	NSInteger viewWidth = 800;
	NSInteger viewHeight = 600;
	RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, viewWidth, viewHeight)]);

	RetainPtr<PlatformWindow> window;
	CGFloat backingScaleFactor;

	#if PLATFORM(MAC)
	window = adoptNS([[NSWindow alloc] initWithContentRect:[webView frame] styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO]);
	[[window contentView] addSubview:webView.get()];
	backingScaleFactor = [window backingScaleFactor];
	#elif PLATFORM(IOS_FAMILY)
	window = adoptNS([[UIWindow alloc] initWithFrame:[webView frame]]);
	[window addSubview:webView.get()];
	backingScaleFactor = [[window screen] scale];
	#endif

	[webView loadHTMLString:@"<body style='margin:0'><div id='change-me' style='background-color:red; position:fixed; width:100%; height:100%'></div></body>" baseURL:nil];
	[webView _test_waitForDidFinishNavigation];

	RetainPtr<WKSnapshotConfiguration> snapshotConfiguration = adoptNS([[WKSnapshotConfiguration alloc] init]);
	[snapshotConfiguration setRect:NSMakeRect(0, 0, viewWidth, viewHeight)];
	[snapshotConfiguration setSnapshotWidth:@(viewWidth)];
	[snapshotConfiguration setAfterScreenUpdates:NO];

	[webView evaluateJavaScript:@"var div = document.getElementById('change-me');div.style.backgroundColor = 'blue';" completionHandler:nil];

	isDone = false;
	[webView takeSnapshotWithConfiguration:snapshotConfiguration.get() completionHandler:^(PlatformImage snapshotImage, NSError *error) {
	EXPECT_NULL(error);

	EXPECT_EQ(viewWidth, snapshotImage.size.width);

	RetainPtr<CGImageRef> cgImage = convertToCGImage(snapshotImage);
	RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());

	NSInteger viewWidthInPixels = viewWidth * backingScaleFactor;
	NSInteger viewHeightInPixels = viewHeight * backingScaleFactor;

	uint8_t rgba = (unsigned char )calloc(viewWidthInPixels * viewHeightInPixels * 4, sizeof(unsigned char));
	RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast \| kCGBitmapByteOrder32Big);
	CGContextDrawImage(context.get(), CGRectMake(0, 0, viewWidthInPixels, viewHeightInPixels), cgImage.get());

	NSInteger pixelIndex = getPixelIndex(0, 0, viewWidthInPixels);
	EXPECT_EQ(0, rgba[pixelIndex]);
	EXPECT_EQ(0, rgba[pixelIndex + 1]);
	EXPECT_EQ(255, rgba[pixelIndex + 2]);

	free(rgba);

	isDone = true;
	}];

	TestWebKitAPI::Util::run(&isDone);
	}