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/*
* Copyright (C) 2011 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.
*/
#include "config.h"
#include "TestInvocation.h"
#include "PixelDumpSupport.h"
#include "PlatformWebView.h"
#include "TestController.h"
#include <ImageIO/CGImageDestination.h>
#include <WebKit2/WKImageCG.h>
#include <wtf/MD5.h>
#include <wtf/RetainPtr.h>
#include <wtf/StringExtras.h>
#if PLATFORM(MAC)
#include <LaunchServices/UTCoreTypes.h>
#endif
#if PLATFORM(WIN)
static const CFStringRef kUTTypePNG = CFSTR("public.png");
#endif
namespace WTR {
enum FlipGraphicsContextOrNot {
DontFlipGraphicsContext,
FlipGraphicsContext
};
static CGContextRef createCGContextFromImage(WKImageRef wkImage, FlipGraphicsContextOrNot flip = DontFlipGraphicsContext)
{
RetainPtr<CGImageRef> image = adoptCF(WKImageCreateCGImage(wkImage));
size_t pixelsWide = CGImageGetWidth(image.get());
size_t pixelsHigh = CGImageGetHeight(image.get());
size_t rowBytes = (4 * pixelsWide + 63) & ~63;
// Creating this bitmap in the device color space should prevent any color conversion when the image of the web view is drawn into it.
RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());
CGContextRef context = CGBitmapContextCreate(0, pixelsWide, pixelsHigh, 8, rowBytes, colorSpace.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
if (flip == FlipGraphicsContext) {
CGContextSaveGState(context);
CGContextScaleCTM(context, 1, -1);
CGContextTranslateCTM(context, 0, -static_cast<CGFloat>(pixelsHigh));
}
CGContextDrawImage(context, CGRectMake(0, 0, pixelsWide, pixelsHigh), image.get());
if (flip == FlipGraphicsContext)
CGContextRestoreGState(context);
return context;
}
void computeMD5HashStringForContext(CGContextRef bitmapContext, char hashString[33])
{
ASSERT(CGBitmapContextGetBitsPerPixel(bitmapContext) == 32); // ImageDiff assumes 32 bit RGBA, we must as well.
size_t pixelsHigh = CGBitmapContextGetHeight(bitmapContext);
size_t pixelsWide = CGBitmapContextGetWidth(bitmapContext);
size_t bytesPerRow = CGBitmapContextGetBytesPerRow(bitmapContext);
// We need to swap the bytes to ensure consistent hashes independently of endianness
MD5 md5;
unsigned char* bitmapData = static_cast<unsigned char*>(CGBitmapContextGetData(bitmapContext));
#if PLATFORM(MAC)
if ((CGBitmapContextGetBitmapInfo(bitmapContext) & kCGBitmapByteOrderMask) == kCGBitmapByteOrder32Big) {
for (unsigned row = 0; row < pixelsHigh; row++) {
Vector<uint8_t> buffer(4 * pixelsWide);
for (unsigned column = 0; column < pixelsWide; column++)
buffer[column] = OSReadLittleInt32(bitmapData, 4 * column);
md5.addBytes(buffer);
bitmapData += bytesPerRow;
}
} else
#endif
{
for (unsigned row = 0; row < pixelsHigh; row++) {
md5.addBytes(bitmapData, 4 * pixelsWide);
bitmapData += bytesPerRow;
}
}
Vector<uint8_t, 16> hash;
md5.checksum(hash);
hashString[0] = '\0';
for (int i = 0; i < 16; i++)
snprintf(hashString, 33, "%s%02x", hashString, hash[i]);
}
static void dumpBitmap(CGContextRef bitmapContext, const char* checksum)
{
RetainPtr<CGImageRef> image = adoptCF(CGBitmapContextCreateImage(bitmapContext));
RetainPtr<CFMutableDataRef> imageData = adoptCF(CFDataCreateMutable(0, 0));
RetainPtr<CGImageDestinationRef> imageDest = adoptCF(CGImageDestinationCreateWithData(imageData.get(), kUTTypePNG, 1, 0));
CGImageDestinationAddImage(imageDest.get(), image.get(), 0);
CGImageDestinationFinalize(imageDest.get());
const unsigned char* data = CFDataGetBytePtr(imageData.get());
const size_t dataLength = CFDataGetLength(imageData.get());
printPNG(data, dataLength, checksum);
}
static void paintRepaintRectOverlay(CGContextRef context, WKImageRef image, WKArrayRef repaintRects)
{
WKSize imageSize = WKImageGetSize(image);
CGContextSaveGState(context);
// Using a transparency layer is easier than futzing with clipping.
CGContextBeginTransparencyLayer(context, 0);
// Flip the context.
CGContextScaleCTM(context, 1, -1);
CGContextTranslateCTM(context, 0, -imageSize.height);
CGContextSetRGBFillColor(context, 0, 0, 0, static_cast<CGFloat>(0.66));
CGContextFillRect(context, CGRectMake(0, 0, imageSize.width, imageSize.height));
// Clear the repaint rects.
size_t count = WKArrayGetSize(repaintRects);
for (size_t i = 0; i < count; ++i) {
WKRect rect = WKRectGetValue(static_cast<WKRectRef>(WKArrayGetItemAtIndex(repaintRects, i)));
CGRect cgRect = CGRectMake(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height);
CGContextClearRect(context, cgRect);
}
CGContextEndTransparencyLayer(context);
CGContextRestoreGState(context);
}
void TestInvocation::dumpPixelsAndCompareWithExpected(WKImageRef image, WKArrayRef repaintRects)
{
PlatformWebView* webView = TestController::shared().mainWebView();
WKRetainPtr<WKImageRef> windowSnapshot = webView->windowSnapshotImage();
// There is no way at this time to fake a window's scale factor, so we need to avoid the window
// snapshots for HiDPI tests.
if (WKPageGetBackingScaleFactor(webView->page()) != 1)
windowSnapshot = 0;
RetainPtr<CGContextRef> context;
if (windowSnapshot)
context = adoptCF(createCGContextFromImage(windowSnapshot.get(), DontFlipGraphicsContext));
else
context = adoptCF(createCGContextFromImage(image));
// A non-null repaintRects array means we're doing a repaint test.
if (repaintRects)
paintRepaintRectOverlay(context.get(), image, repaintRects);
char actualHash[33];
computeMD5HashStringForContext(context.get(), actualHash);
if (!compareActualHashToExpectedAndDumpResults(actualHash))
dumpBitmap(context.get(), actualHash);
}
} // namespace WTR
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