--- a/WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp Fri Sep 17 09:02:29 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,250 +0,0 @@
-/*
- * 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)
-{
- 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);
- RetainPtr<CGContextRef> baseContext(AdoptCF, CGBitmapContextCreate(baseBuffer, width, height, 8, rowBytes, CGImageGetColorSpace(baseImage), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));
- CGContextDrawImage(baseContext.get(), CGRectMake(0, 0, width, height), baseImage);
-
- // Draw test image in bitmap context
- void* buffer = calloc(height, rowBytes);
- RetainPtr<CGContextRef> context(AdoptCF, CGBitmapContextCreate(buffer, width, height, 8, rowBytes, CGImageGetColorSpace(testImage), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));
- CGContextDrawImage(context.get(), CGRectMake(0, 0, width, height), testImage);
-
- // 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;
-
- RetainPtr<CGImageRef> diffImage;
- // 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;
- }
-
- static CGColorSpaceRef diffColorspace = CGColorSpaceCreateDeviceGray();
- RetainPtr<CGDataProviderRef> provider(AdoptCF, CGDataProviderCreateWithData(0, diffBuffer, width * height, releaseMallocBuffer));
- diffImage.adoptCF(CGImageCreate(width, height, 8, 8, width, diffColorspace, 0, provider.get(), 0, false, kCGRenderingIntentDefault));
- }
- 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;
-}