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30 #include "PixelDumpSupport.h"
32 #include "CyclicRedundancyCheck.h"
33 #include "DumpRenderTree.h"
34 #include "LayoutTestController.h"
36 #include <wtf/Assertions.h>
37 #include <wtf/RefPtr.h>
38 #include <wtf/Vector.h>
41 #include "PixelDumpSupportCG.h"
43 #include "PixelDumpSupportCairo.h"
44 #elif PLATFORM(BLACKBERRY)
45 #include "PixelDumpSupportBlackBerry.h"
48 void dumpWebViewAsPixelsAndCompareWithExpected(const std::string& expectedHash)
50 RefPtr<BitmapContext> context;
52 if (gLayoutTestController->isPrinting())
53 context = createPagedBitmapContext();
56 context = createBitmapContextFromWebView(gLayoutTestController->testOnscreen(), gLayoutTestController->testRepaint(), gLayoutTestController->testRepaintSweepHorizontally(), gLayoutTestController->dumpSelectionRect());
59 // Compute the hash of the bitmap context pixels
61 computeMD5HashStringForBitmapContext(context.get(), actualHash);
62 printf("\nActualHash: %s\n", actualHash); // FIXME: No need for the leading newline.
64 // Check the computed hash against the expected one and dump image on mismatch
65 bool dumpImage = true;
66 if (expectedHash.length() > 0) {
67 ASSERT(expectedHash.length() == 32);
69 printf("\nExpectedHash: %s\n", expectedHash.c_str()); // FIXME: No need for the leading newline.
71 if (expectedHash == actualHash) // FIXME: do case insensitive compare
76 dumpBitmap(context.get(), actualHash);
79 static void appendIntToVector(unsigned number, Vector<unsigned char>& vector)
81 size_t offset = vector.size();
82 vector.grow(offset + 4);
83 vector[offset] = ((number >> 24) & 0xff);
84 vector[offset + 1] = ((number >> 16) & 0xff);
85 vector[offset + 2] = ((number >> 8) & 0xff);
86 vector[offset + 3] = (number & 0xff);
89 static void convertChecksumToPNGComment(const char* checksum, Vector<unsigned char>& bytesToAdd)
91 // Chunks of PNG files are <length>, <type>, <data>, <crc>.
92 static const char textCommentPrefix[] = "\x00\x00\x00\x29tEXtchecksum\x00";
93 static const size_t prefixLength = sizeof(textCommentPrefix) - 1; // The -1 is for the null at the end of the char[].
94 static const size_t checksumLength = 32;
96 bytesToAdd.append(textCommentPrefix, prefixLength);
97 bytesToAdd.append(checksum, checksumLength);
99 Vector<unsigned char> dataToCrc;
100 dataToCrc.append(textCommentPrefix + 4, prefixLength - 4); // Don't include the chunk length in the crc.
101 dataToCrc.append(checksum, checksumLength);
102 unsigned crc32 = computeCrc(dataToCrc);
104 appendIntToVector(crc32, bytesToAdd);
107 static size_t offsetAfterIHDRChunk(const unsigned char* data, const size_t dataLength)
109 const int pngHeaderLength = 8;
110 const int pngIHDRChunkLength = 25; // chunk length + "IHDR" + 13 bytes of data + checksum
111 return pngHeaderLength + pngIHDRChunkLength;
114 void printPNG(const unsigned char* data, const size_t dataLength, const char* checksum)
116 Vector<unsigned char> bytesToAdd;
117 convertChecksumToPNGComment(checksum, bytesToAdd);
119 printf("Content-Type: %s\n", "image/png");
120 printf("Content-Length: %lu\n", static_cast<unsigned long>(dataLength + bytesToAdd.size()));
122 size_t insertOffset = offsetAfterIHDRChunk(data, dataLength);
124 fwrite(data, 1, insertOffset, stdout);
125 fwrite(bytesToAdd.data(), 1, bytesToAdd.size(), stdout);
127 const size_t bytesToWriteInOneChunk = 1 << 15;
128 data += insertOffset;
129 size_t dataRemainingToWrite = dataLength - insertOffset;
130 while (dataRemainingToWrite) {
131 size_t bytesToWriteInThisChunk = std::min(dataRemainingToWrite, bytesToWriteInOneChunk);
132 size_t bytesWritten = fwrite(data, 1, bytesToWriteInThisChunk, stdout);
133 if (bytesWritten != bytesToWriteInThisChunk)
135 dataRemainingToWrite -= bytesWritten;
136 data += bytesWritten;