diff options
Diffstat (limited to 'WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp')
| -rw-r--r-- | WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp b/WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp new file mode 100644 index 0000000..e6da06f --- /dev/null +++ b/WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp @@ -0,0 +1,256 @@ +/* + * Copyright (C) 2005, 2007 Apple Inc. All rights reserved. + * Copyright (C) 2005 Ben La Monica <ben.lamonica@gmail.com>. 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 THE AUTHOR ``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 THE AUTHOR OR + * 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. + */ + +#define min min + +#include <stdio.h> +#include <wtf/Platform.h> +#include <wtf/RetainPtr.h> + +#if PLATFORM(WIN) +#include <winsock2.h> +#include <windows.h> +#include <fcntl.h> +#include <io.h> +#include <wtf/MathExtras.h> +#endif + +#include <CoreGraphics/CGBitmapContext.h> +#include <CoreGraphics/CGImage.h> +#include <ImageIO/CGImageDestination.h> + +#if PLATFORM(MAC) +#include <LaunchServices/UTCoreTypes.h> +#endif + +#ifndef CGFLOAT_DEFINED +#ifdef __LP64__ +typedef double CGFloat; +#else +typedef float CGFloat; +#endif +#define CGFLOAT_DEFINED 1 +#endif + +using namespace std; + +#if PLATFORM(WIN) +static inline float strtof(const char *nptr, char **endptr) +{ + return strtod(nptr, endptr); +} +static const CFStringRef kUTTypePNG = CFSTR("public.png"); +#endif + +static RetainPtr<CGImageRef> createImageFromStdin(int bytesRemaining) +{ + unsigned char buffer[2048]; + RetainPtr<CFMutableDataRef> data(AdoptCF, CFDataCreateMutable(0, bytesRemaining)); + + while (bytesRemaining > 0) { + size_t bytesToRead = min(bytesRemaining, 2048); + size_t bytesRead = fread(buffer, 1, bytesToRead, stdin); + CFDataAppendBytes(data.get(), buffer, static_cast<CFIndex>(bytesRead)); + bytesRemaining -= static_cast<int>(bytesRead); + } + RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateWithCFData(data.get())); + return RetainPtr<CGImageRef>(AdoptCF, CGImageCreateWithPNGDataProvider(dataProvider.get(), 0, false, kCGRenderingIntentDefault)); +} + +static void releaseMallocBuffer(void* info, const void* data, size_t size) +{ + free((void*)data); +} + +static RetainPtr<CGImageRef> createDifferenceImage(CGImageRef baseImage, CGImageRef testImage, float& difference) +{ + static RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB()); + RetainPtr<CGImageRef> diffImage; + + size_t width = CGImageGetWidth(baseImage); + size_t height = CGImageGetHeight(baseImage); + size_t rowBytes = width * 4; + + // Draw base image in bitmap context + void* baseBuffer = calloc(height, rowBytes); + CGContextRef baseContext = CGBitmapContextCreate(baseBuffer, width, height, 8, rowBytes, colorSpace.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host); + CGContextDrawImage(baseContext, CGRectMake(0, 0, width, height), baseImage); + CGContextRelease(baseContext); + + // Draw test image in bitmap context + void* buffer = calloc(height, rowBytes); + CGContextRef context = CGBitmapContextCreate(buffer, width, height, 8, rowBytes, colorSpace.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host); + CGContextDrawImage(context, CGRectMake(0, 0, width, height), testImage); + CGContextRelease(context); + + // Compare the content of the 2 bitmaps + void* diffBuffer = malloc(width * height); + float count = 0.0f; + float sum = 0.0f; + float maxDistance = 0.0f; + unsigned char* basePixel = (unsigned char*)baseBuffer; + unsigned char* pixel = (unsigned char*)buffer; + unsigned char* diff = (unsigned char*)diffBuffer; + for (size_t y = 0; y < height; ++y) { + for (size_t x = 0; x < width; ++x) { + float red = (pixel[0] - basePixel[0]) / max<float>(255 - basePixel[0], basePixel[0]); + float green = (pixel[1] - basePixel[1]) / max<float>(255 - basePixel[1], basePixel[1]); + float blue = (pixel[2] - basePixel[2]) / max<float>(255 - basePixel[2], basePixel[2]); + float alpha = (pixel[3] - basePixel[3]) / max<float>(255 - basePixel[3], basePixel[3]); + float distance = sqrtf(red * red + green * green + blue * blue + alpha * alpha) / 2.0f; + + *diff++ = (unsigned char)(distance * 255.0f); + + if (distance >= 1.0f / 255.0f) { + count += 1.0f; + sum += distance; + if (distance > maxDistance) + maxDistance = distance; + } + + basePixel += 4; + pixel += 4; + } + } + + // Compute the difference as a percentage combining both the number of different pixels and their difference amount i.e. the average distance over the entire image + if (count > 0.0f) + difference = 100.0f * sum / (height * width); + else + difference = 0.0f; + + // Generate a normalized diff image if there is any difference + if (difference > 0.0f) { + if (maxDistance < 1.0f) { + diff = (unsigned char*)diffBuffer; + for(size_t p = 0; p < height * width; ++p) + diff[p] = diff[p] / maxDistance; + } + + CGDataProviderRef provider = CGDataProviderCreateWithData(0, diffBuffer, width * height, releaseMallocBuffer); + CGColorSpaceRef diffColorspace = CGColorSpaceCreateDeviceGray(); + diffImage.adoptCF(CGImageCreate(width, height, 8, 8, width, diffColorspace, 0, provider, 0, false, kCGRenderingIntentDefault)); + CGColorSpaceRelease(diffColorspace); + CGDataProviderRelease(provider); + } + else + free(diffBuffer); + + // Destroy drawing buffers + if (buffer) + free(buffer); + if (baseBuffer) + free(baseBuffer); + + return diffImage; +} + +static inline bool imageHasAlpha(CGImageRef image) +{ + CGImageAlphaInfo info = CGImageGetAlphaInfo(image); + + return (info >= kCGImageAlphaPremultipliedLast) && (info <= kCGImageAlphaFirst); +} + +int main(int argc, const char* argv[]) +{ +#if PLATFORM(WIN) + _setmode(0, _O_BINARY); + _setmode(1, _O_BINARY); +#endif + + float tolerance = 0.0f; + + for (int i = 1; i < argc; ++i) { + if (!strcmp(argv[i], "-t") || !strcmp(argv[i], "--tolerance")) { + if (i >= argc - 1) + exit(1); + tolerance = strtof(argv[i + 1], 0); + ++i; + continue; + } + } + + char buffer[2048]; + RetainPtr<CGImageRef> actualImage; + RetainPtr<CGImageRef> baselineImage; + + while (fgets(buffer, sizeof(buffer), stdin)) { + // remove the CR + char* newLineCharacter = strchr(buffer, '\n'); + if (newLineCharacter) + *newLineCharacter = '\0'; + + if (!strncmp("Content-Length: ", buffer, 16)) { + strtok(buffer, " "); + int imageSize = strtol(strtok(0, " "), 0, 10); + + if (imageSize > 0 && !actualImage) + actualImage = createImageFromStdin(imageSize); + else if (imageSize > 0 && !baselineImage) + baselineImage = createImageFromStdin(imageSize); + else + fputs("error, image size must be specified.\n", stdout); + } + + if (actualImage && baselineImage) { + RetainPtr<CGImageRef> diffImage; + float difference = 100.0f; + + if ((CGImageGetWidth(actualImage.get()) == CGImageGetWidth(baselineImage.get())) && (CGImageGetHeight(actualImage.get()) == CGImageGetHeight(baselineImage.get())) && (imageHasAlpha(actualImage.get()) == imageHasAlpha(baselineImage.get()))) { + diffImage = createDifferenceImage(actualImage.get(), baselineImage.get(), difference); // difference is passed by reference + if (difference <= tolerance) + difference = 0.0f; + else { + difference = roundf(difference * 100.0f) / 100.0f; + difference = max(difference, 0.01f); // round to 2 decimal places + } + } else + fputs("error, test and reference image have different properties.\n", stderr); + + if (difference > 0.0f) { + if (diffImage) { + RetainPtr<CFMutableDataRef> imageData(AdoptCF, CFDataCreateMutable(0, 0)); + RetainPtr<CGImageDestinationRef> imageDest(AdoptCF, CGImageDestinationCreateWithData(imageData.get(), kUTTypePNG, 1, 0)); + CGImageDestinationAddImage(imageDest.get(), diffImage.get(), 0); + CGImageDestinationFinalize(imageDest.get()); + printf("Content-Length: %lu\n", CFDataGetLength(imageData.get())); + fwrite(CFDataGetBytePtr(imageData.get()), 1, CFDataGetLength(imageData.get()), stdout); + } + + fprintf(stdout, "diff: %01.2f%% failed\n", difference); + } else + fprintf(stdout, "diff: %01.2f%% passed\n", difference); + + actualImage = 0; + baselineImage = 0; + } + + fflush(stdout); + } + + return 0; +} |