external/webkit r30707

3 files changed, 389 insertions, 0 deletions

diff --git a/WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp b/WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp
new file mode 100644
index 0000000..6a84b79
--- /dev/null
+++ b/WebKitTools/DumpRenderTree/cg/ImageDiffCG.cpp
@@ -0,0 +1,208 @@
+/*
+ * 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 <CoreGraphics/CGBitmapContext.h>
+#include <CoreGraphics/CGImage.h>
+#include <ImageIO/CGImageDestination.h>
+#include <stdio.h>
+#include <wtf/Platform.h>
+#include <wtf/RetainPtr.h>
+
+#if PLATFORM(WIN)
+#include <fcntl.h>
+#include <io.h>
+#endif
+
+#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 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 RetainPtr<CGContextRef> getDifferenceBitmap(CGImageRef testBitmap, CGImageRef referenceBitmap)
+{
+    // we must have both images to take diff
+    if (!testBitmap || !referenceBitmap)
+        return 0;
+
+    RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB());
+    static CFMutableDataRef data = CFDataCreateMutable(kCFAllocatorDefault, 0);
+    CFDataSetLength(data, CGImageGetHeight(testBitmap) * CGImageGetBytesPerRow(testBitmap));
+    RetainPtr<CGContextRef> context(AdoptCF, CGBitmapContextCreate(CFDataGetMutableBytePtr(data), CGImageGetWidth(testBitmap), CGImageGetHeight(testBitmap),
+        CGImageGetBitsPerComponent(testBitmap), CGImageGetBytesPerRow(testBitmap), colorSpace.get(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst));
+
+    CGContextSetBlendMode(context.get(), kCGBlendModeNormal);
+    CGContextDrawImage(context.get(), CGRectMake(0, 0, static_cast<CGFloat>(CGImageGetWidth(testBitmap)), static_cast<CGFloat>(CGImageGetHeight(testBitmap))), testBitmap);
+    CGContextSetBlendMode(context.get(), kCGBlendModeDifference);
+    CGContextDrawImage(context.get(), CGRectMake(0, 0, static_cast<CGFloat>(CGImageGetWidth(referenceBitmap)), static_cast<CGFloat>(CGImageGetHeight(referenceBitmap))), referenceBitmap);
+
+    return context;
+}
+
+/**
+ * Counts the number of non-black pixels, and returns the percentage
+ * of non-black pixels to total pixels in the image.
+ */
+static float computePercentageDifferent(CGContextRef diffBitmap, unsigned threshold)
+{
+    // if diffBiatmap is nil, then there was an error, and it didn't match.
+    if (!diffBitmap)
+        return 100.0f;
+
+    size_t pixelsHigh = CGBitmapContextGetHeight(diffBitmap);
+    size_t pixelsWide = CGBitmapContextGetWidth(diffBitmap);
+    size_t bytesPerRow = CGBitmapContextGetBytesPerRow(diffBitmap);
+    unsigned char* pixelRowData = static_cast<unsigned char*>(CGBitmapContextGetData(diffBitmap));
+    unsigned differences = 0;
+
+    // NOTE: This may not be safe when switching between ENDIAN types
+    for (unsigned row = 0; row < pixelsHigh; row++) {
+        for (unsigned col = 0; col < (pixelsWide * 4); col += 4) {
+            unsigned char* red = pixelRowData + col;
+            unsigned char* green = red + 1;
+            unsigned char* blue = red + 2;
+            unsigned distance = *red + *green + *blue;
+            if (distance > threshold) {
+                differences++;
+                // shift the pixels towards white to make them more visible
+                *red = static_cast<unsigned char>(min(UCHAR_MAX, *red + 100));
+                *green = static_cast<unsigned char>(min(UCHAR_MAX, *green + 100));
+                *blue = static_cast<unsigned char>(min(UCHAR_MAX, *blue + 100));
+            }
+        }
+        pixelRowData += bytesPerRow;
+    }
+
+    float totalPixels = static_cast<float>(pixelsHigh * pixelsWide);
+    return (differences * 100.f) / totalPixels;
+}
+
+static void compareImages(CGImageRef actualBitmap, CGImageRef baselineBitmap, unsigned threshold)
+{
+    // prepare the difference blend to check for pixel variations
+    RetainPtr<CGContextRef> diffBitmap = getDifferenceBitmap(actualBitmap, baselineBitmap);
+
+    float percentage = computePercentageDifferent(diffBitmap.get(), threshold);
+
+    percentage = (float)((int)(percentage * 100.0f)) / 100.0f; // round to 2 decimal places
+
+    // send message to let them know if an image was wrong
+    if (percentage > 0.0f) {
+        // since the diff might actually show something, send it to stdout
+        RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(diffBitmap.get()));
+        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());
+        printf("Content-length: %lu\n", CFDataGetLength(imageData.get()));
+        fwrite(CFDataGetBytePtr(imageData.get()), 1, CFDataGetLength(imageData.get()), stdout);
+        fprintf(stdout, "diff: %01.2f%% failed\n", percentage);
+    } else
+        fprintf(stdout, "diff: %01.2f%% passed\n", percentage);
+}
+
+int main(int argc, const char* argv[])
+{
+#if PLATFORM(WIN)
+    _setmode(0, _O_BINARY);
+    _setmode(1, _O_BINARY);
+#endif
+
+    unsigned threshold = 0;
+
+    for (int i = 1; i < argc; ++i) {
+        if (!strcmp(argv[i], "-t") || !strcmp(argv[i], "--threshold")) {
+            if (i >= argc - 1)
+                exit(1);
+            threshold = strtol(argv[i + 1], 0, 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) {
+            compareImages(actualImage.get(), baselineImage.get(), threshold);
+            actualImage = 0;
+            baselineImage = 0;
+        }
+
+        fflush(stdout);
+    }
+
+    return 0;
+}
diff --git a/WebKitTools/DumpRenderTree/cg/PixelDumpSupportCG.cpp b/WebKitTools/DumpRenderTree/cg/PixelDumpSupportCG.cpp
new file mode 100644
index 0000000..e2e790c
--- /dev/null
+++ b/WebKitTools/DumpRenderTree/cg/PixelDumpSupportCG.cpp
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2005, 2006, 2007 Apple Inc. All rights reserved.
+ *           (C) 2007 Graham Dennis (graham.dennis@gmail.com)
+ *           (C) 2007 Eric Seidel <eric@webkit.org>
+ *
+ * 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "DumpRenderTree.h"
+#include "PixelDumpSupportCG.h"
+
+#include "LayoutTestController.h"
+#include <ImageIO/CGImageDestination.h>
+#include <wtf/Assertions.h>
+#include <wtf/RetainPtr.h>
+#include <wtf/StringExtras.h>
+
+#if PLATFORM(WIN)
+#include "MD5.h"
+#elif PLATFORM(MAC)
+#include <LaunchServices/UTCoreTypes.h>
+#define COMMON_DIGEST_FOR_OPENSSL
+#include <CommonCrypto/CommonDigest.h>
+#endif
+
+#if PLATFORM(WIN)
+static const CFStringRef kUTTypePNG = CFSTR("public.png");
+#endif
+
+static void printPNG(CGImageRef image)
+{
+    RetainPtr<CFMutableDataRef> imageData(AdoptCF, CFDataCreateMutable(0, 0));
+    RetainPtr<CGImageDestinationRef> imageDest(AdoptCF, CGImageDestinationCreateWithData(imageData.get(), kUTTypePNG, 1, 0));
+    CGImageDestinationAddImage(imageDest.get(), image, 0);
+    CGImageDestinationFinalize(imageDest.get());
+    printf("Content-length: %lu\n", CFDataGetLength(imageData.get()));
+    fwrite(CFDataGetBytePtr(imageData.get()), 1, CFDataGetLength(imageData.get()), stdout);
+}
+
+static void getMD5HashStringForBitmap(CGContextRef bitmap, char string[33])
+{
+    MD5_CTX md5Context;
+    unsigned char hash[16];
+
+    size_t bitsPerPixel = CGBitmapContextGetBitsPerPixel(bitmap);
+    ASSERT(bitsPerPixel == 32); // ImageDiff assumes 32 bit RGBA, we must as well.
+    size_t bytesPerPixel = bitsPerPixel / 8;
+    size_t pixelsHigh = CGBitmapContextGetHeight(bitmap);
+    size_t pixelsWide = CGBitmapContextGetWidth(bitmap);
+    size_t bytesPerRow = CGBitmapContextGetBytesPerRow(bitmap);
+    ASSERT(bytesPerRow >= (pixelsWide * bytesPerPixel));
+
+    MD5_Init(&md5Context);
+    unsigned char* bitmapData = static_cast<unsigned char*>(CGBitmapContextGetData(bitmap));
+    for (unsigned row = 0; row < pixelsHigh; row++) {
+        MD5_Update(&md5Context, bitmapData, static_cast<unsigned>(pixelsWide * bytesPerPixel));
+        bitmapData += bytesPerRow;
+    }
+    MD5_Final(hash, &md5Context);
+
+    string[0] = '\0';
+    for (int i = 0; i < 16; i++)
+        snprintf(string, 33, "%s%02x", string, hash[i]);
+}
+
+void drawSelectionRect(CGContextRef context, const CGRect& rect)
+{
+    CGContextSaveGState(context);
+    CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0);
+    CGContextStrokeRect(context, rect);
+    CGContextRestoreGState(context);
+}
+
+void dumpWebViewAsPixelsAndCompareWithExpected(const char* /*currentTest*/, bool /*forceAllTestsToDumpPixels*/)
+{
+    RetainPtr<CGContextRef> context = getBitmapContextFromWebView();
+
+#if PLATFORM(MAC)
+    if (layoutTestController->testRepaint())
+        repaintWebView(context.get(), layoutTestController->testRepaintSweepHorizontally());
+    else 
+        paintWebView(context.get());
+
+    if (layoutTestController->dumpSelectionRect())
+        drawSelectionRect(context.get(), getSelectionRect());
+#endif
+
+    // Compute the actual hash to compare to the expected image's hash.
+    char actualHash[33];
+    getMD5HashStringForBitmap(context.get(), actualHash);
+    printf("\nActualHash: %s\n", actualHash);
+
+    // FIXME: We should compare the actualHash to the expected hash here and
+    // only set dumpImage to true if they don't match, but DRT doesn't have
+    // enough information currently to find the expected checksum file.
+    bool dumpImage = true;
+
+    if (dumpImage) {
+        RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(context.get()));
+        printPNG(image.get());
+    }
+
+    printf("#EOF\n");
+}
diff --git a/WebKitTools/DumpRenderTree/cg/PixelDumpSupportCG.h b/WebKitTools/DumpRenderTree/cg/PixelDumpSupportCG.h
new file mode 100644
index 0000000..0abdea6
--- /dev/null
+++ b/WebKitTools/DumpRenderTree/cg/PixelDumpSupportCG.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2005, 2006, 2007 Apple Inc. All rights reserved.
+ *           (C) 2007 Graham Dennis (graham.dennis@gmail.com)
+ *           (C) 2007 Eric Seidel <eric@webkit.org>
+ *
+ * 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
+ */
+
+#ifndef PixelDumpSupportCG_h
+#define PixelDumpSupportCG_h
+
+#include <wtf/RetainPtr.h>
+
+#ifndef CGFLOAT_DEFINED
+#ifdef __LP64__
+typedef double CGFloat;
+#else
+typedef float CGFloat;
+#endif
+#define CGFLOAT_DEFINED 1
+#endif
+
+typedef struct CGContext* CGContextRef;
+struct CGRect;
+
+RetainPtr<CGContextRef> getBitmapContextFromWebView();
+CGRect getSelectionRect();
+
+void paintWebView(CGContextRef);
+void repaintWebView(CGContextRef context, bool horizontal);
+void drawSelectionRect(CGContextRef, const CGRect&);
+
+#endif // PixelDumpSupportCG_h