1 files changed, 113 insertions, 0 deletions
diff --git a/Tools/DumpRenderTree/cg/PixelDumpSupportCG.cpp b/Tools/DumpRenderTree/cg/PixelDumpSupportCG.cpp
new file mode 100644
index 0000000..5cf32f1
--- /dev/null
+++ b/Tools/DumpRenderTree/cg/PixelDumpSupportCG.cpp
@@ -0,0 +1,113 @@
+/*
+ * 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 "config.h"
+#include "PixelDumpSupportCG.h"
+
+#include "DumpRenderTree.h"
+#include "PixelDumpSupport.h"
+#include <ImageIO/CGImageDestination.h>
+#include <algorithm>
+#include <ctype.h>
+#include <wtf/Assertions.h>
+#include <wtf/RefPtr.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
+
+using namespace std;
+
+#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());
+
+    const UInt8* data = CFDataGetBytePtr(imageData.get());
+    CFIndex dataLength = CFDataGetLength(imageData.get());
+
+    printPNG(static_cast<const unsigned char*>(data), static_cast<size_t>(dataLength));
+}
+
+void computeMD5HashStringForBitmapContext(BitmapContext* context, char hashString[33])
+{
+    CGContextRef bitmapContext = context->cgContext();
+
+    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_CTX md5Context;
+    MD5_Init(&md5Context);
+    unsigned char* bitmapData = static_cast<unsigned char*>(CGBitmapContextGetData(bitmapContext));
+#if PLATFORM(MAC)
+    if ((CGBitmapContextGetBitmapInfo(bitmapContext) & kCGBitmapByteOrderMask) == kCGBitmapByteOrder32Big) {
+        for (unsigned row = 0; row < pixelsHigh; row++) {
+            uint32_t buffer[pixelsWide];
+            for (unsigned column = 0; column < pixelsWide; column++)
+                buffer[column] = OSReadLittleInt32(bitmapData, 4 * column);
+            MD5_Update(&md5Context, buffer, 4 * pixelsWide);
+            bitmapData += bytesPerRow;
+        }
+    } else
+#endif
+    {
+        for (unsigned row = 0; row < pixelsHigh; row++) {
+            MD5_Update(&md5Context, bitmapData, 4 * pixelsWide);
+            bitmapData += bytesPerRow;
+        }
+    }
+    unsigned char hash[16];
+    MD5_Final(hash, &md5Context);
+
+    hashString[0] = '\0';
+    for (int i = 0; i < 16; i++)
+        snprintf(hashString, 33, "%s%02x", hashString, hash[i]);
+}
+
+void dumpBitmap(BitmapContext* context)
+{
+    RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(context->cgContext()));
+    printPNG(image.get());
+}