1 files changed, 232 insertions, 0 deletions
diff --git a/chromium/third_party/skia/tools/image_expectations.cpp b/chromium/third_party/skia/tools/image_expectations.cpp
new file mode 100644
index 00000000000..ac232e9f30d
--- /dev/null
+++ b/chromium/third_party/skia/tools/image_expectations.cpp
@@ -0,0 +1,232 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkBitmap.h"
+#include "SkBitmapHasher.h"
+#include "SkData.h"
+#include "SkJSONCPP.h"
+#include "SkOSFile.h"
+#include "SkStream.h"
+#include "SkTypes.h"
+
+#include "image_expectations.h"
+
+/*
+ * TODO(epoger): Make constant strings consistent instead of mixing hypenated and camel-caps.
+ *
+ * TODO(epoger): Similar constants are already maintained in 2 other places:
+ * gm/gm_json.py and gm/gm_expectations.cpp. We shouldn't add yet a third place.
+ * Figure out a way to share the definitions instead.
+ *
+ * Note that, as of https://codereview.chromium.org/226293002 , the JSON
+ * schema used here has started to differ from the one in gm_expectations.cpp .
+ * TODO(epoger): Consider getting GM and render_pictures to use the same JSON
+ * output module.
+ */
+const static char kJsonKey_ActualResults[] = "actual-results";
+const static char kJsonKey_ExpectedResults[] = "expected-results";
+const static char kJsonKey_Header[] = "header";
+const static char kJsonKey_Header_Type[] = "type";
+const static char kJsonKey_Header_Revision[] = "revision";
+const static char kJsonKey_Image_ChecksumAlgorithm[] = "checksumAlgorithm";
+const static char kJsonKey_Image_ChecksumValue[] = "checksumValue";
+const static char kJsonKey_Image_ComparisonResult[] = "comparisonResult";
+const static char kJsonKey_Image_Filepath[] = "filepath";
+const static char kJsonKey_Image_IgnoreFailure[] = "ignoreFailure";
+const static char kJsonKey_Source_TiledImages[] = "tiled-images";
+const static char kJsonKey_Source_WholeImage[] = "whole-image";
+// Values (not keys) that are written out by this JSON generator
+const static char kJsonValue_Header_Type[] = "ChecksummedImages";
+const static int kJsonValue_Header_Revision = 1;
+const static char kJsonValue_Image_ChecksumAlgorithm_Bitmap64bitMD5[] = "bitmap-64bitMD5";
+const static char kJsonValue_Image_ComparisonResult_Failed[] = "failed";
+const static char kJsonValue_Image_ComparisonResult_FailureIgnored[] = "failure-ignored";
+const static char kJsonValue_Image_ComparisonResult_NoComparison[] = "no-comparison";
+const static char kJsonValue_Image_ComparisonResult_Succeeded[] = "succeeded";
+
+namespace sk_tools {
+
+    // ImageDigest class...
+
+    ImageDigest::ImageDigest(const SkBitmap &bitmap) {
+        if (!SkBitmapHasher::ComputeDigest(bitmap, &fHashValue)) {
+            SkFAIL("unable to compute image digest");
+        }
+    }
+
+    ImageDigest::ImageDigest(const SkString &hashType, uint64_t hashValue) {
+        if (!hashType.equals(kJsonValue_Image_ChecksumAlgorithm_Bitmap64bitMD5)) {
+            SkFAIL((SkString("unsupported hashType ")+=hashType).c_str());
+        } else {
+            fHashValue = hashValue;
+        }
+    }
+
+    SkString ImageDigest::getHashType() const {
+        // TODO(epoger): The current implementation assumes that the
+        // result digest is always of type kJsonValue_Image_ChecksumAlgorithm_Bitmap64bitMD5 .
+        return SkString(kJsonValue_Image_ChecksumAlgorithm_Bitmap64bitMD5);
+    }
+
+    uint64_t ImageDigest::getHashValue() const {
+        return fHashValue;
+    }
+
+    // BitmapAndDigest class...
+
+    BitmapAndDigest::BitmapAndDigest(const SkBitmap &bitmap) : fBitmap(bitmap) {
+    }
+
+    const ImageDigest *BitmapAndDigest::getImageDigestPtr() {
+        if (NULL == fImageDigestRef.get()) {
+            fImageDigestRef.reset(SkNEW_ARGS(ImageDigest, (fBitmap)));
+        }
+        return fImageDigestRef.get();
+    }
+
+    const SkBitmap *BitmapAndDigest::getBitmapPtr() const {
+        return &fBitmap;
+    }
+
+    // ImageResultsAndExpectations class...
+
+    bool ImageResultsAndExpectations::readExpectationsFile(const char *jsonPath) {
+        if (NULL == jsonPath) {
+            SkDebugf("JSON expectations filename not specified\n");
+            return false;
+        }
+        SkFILE* filePtr = sk_fopen(jsonPath, kRead_SkFILE_Flag);
+        if (NULL == filePtr) {
+            SkDebugf("JSON expectations file '%s' does not exist\n", jsonPath);
+            return false;
+        }
+        size_t size = sk_fgetsize(filePtr);
+        if (0 == size) {
+            SkDebugf("JSON expectations file '%s' is empty, so no expectations\n", jsonPath);
+            sk_fclose(filePtr);
+            fExpectedResults.clear();
+            return true;
+        }
+        bool parsedJson = Parse(filePtr, &fExpectedJsonRoot);
+        sk_fclose(filePtr);
+        if (!parsedJson) {
+            SkDebugf("Failed to parse JSON expectations file '%s'\n", jsonPath);
+            return false;
+        }
+        Json::Value header = fExpectedJsonRoot[kJsonKey_Header];
+        Json::Value headerType = header[kJsonKey_Header_Type];
+        Json::Value headerRevision = header[kJsonKey_Header_Revision];
+        if (strcmp(headerType.asCString(), kJsonValue_Header_Type)) {
+            SkDebugf("JSON expectations file '%s': expected headerType '%s', found '%s'\n",
+                     jsonPath, kJsonValue_Header_Type, headerType.asCString());
+            return false;
+        }
+        if (headerRevision.asInt() != kJsonValue_Header_Revision) {
+            SkDebugf("JSON expectations file '%s': expected headerRevision %d, found %d\n",
+                     jsonPath, kJsonValue_Header_Revision, headerRevision.asInt());
+            return false;
+        }
+        fExpectedResults = fExpectedJsonRoot[kJsonKey_ExpectedResults];
+        return true;
+    }
+
+    void ImageResultsAndExpectations::add(const char *sourceName, const char *fileName,
+                                          const ImageDigest &digest, const int *tileNumber) {
+        // Get expectation, if any.
+        Json::Value expectedImage;
+        if (!fExpectedResults.isNull()) {
+            if (NULL == tileNumber) {
+                expectedImage = fExpectedResults[sourceName][kJsonKey_Source_WholeImage];
+            } else {
+                expectedImage = fExpectedResults[sourceName][kJsonKey_Source_TiledImages]
+                                                [*tileNumber];
+            }
+        }
+
+        // Fill in info about the actual result itself.
+        Json::Value actualChecksumAlgorithm = digest.getHashType().c_str();
+        Json::Value actualChecksumValue = Json::UInt64(digest.getHashValue());
+        Json::Value actualImage;
+        actualImage[kJsonKey_Image_ChecksumAlgorithm] = actualChecksumAlgorithm;
+        actualImage[kJsonKey_Image_ChecksumValue] = actualChecksumValue;
+        actualImage[kJsonKey_Image_Filepath] = fileName;
+
+        // Compare against expectedImage to fill in comparisonResult.
+        Json::Value comparisonResult = kJsonValue_Image_ComparisonResult_NoComparison;
+        if (!expectedImage.isNull()) {
+            if ((actualChecksumAlgorithm == expectedImage[kJsonKey_Image_ChecksumAlgorithm]) &&
+                (actualChecksumValue == expectedImage[kJsonKey_Image_ChecksumValue])) {
+                comparisonResult = kJsonValue_Image_ComparisonResult_Succeeded;
+            } else if (expectedImage[kJsonKey_Image_IgnoreFailure] == true) {
+                comparisonResult = kJsonValue_Image_ComparisonResult_FailureIgnored;
+            } else {
+                comparisonResult = kJsonValue_Image_ComparisonResult_Failed;
+            }
+        }
+        actualImage[kJsonKey_Image_ComparisonResult] = comparisonResult;
+
+        // Add this actual result to our collection.
+        if (NULL == tileNumber) {
+            fActualResults[sourceName][kJsonKey_Source_WholeImage] = actualImage;
+        } else {
+            fActualResults[sourceName][kJsonKey_Source_TiledImages][*tileNumber] = actualImage;
+        }
+    }
+
+    bool ImageResultsAndExpectations::matchesExpectation(const char *sourceName,
+                                                         const ImageDigest &digest,
+                                                         const int *tileNumber) {
+        if (fExpectedResults.isNull()) {
+            return false;
+        }
+
+        Json::Value expectedImage;
+        if (NULL == tileNumber) {
+            expectedImage = fExpectedResults[sourceName][kJsonKey_Source_WholeImage];
+        } else {
+            expectedImage = fExpectedResults[sourceName][kJsonKey_Source_TiledImages][*tileNumber];
+        }
+        if (expectedImage.isNull()) {
+            return false;
+        }
+
+        Json::Value actualChecksumAlgorithm = digest.getHashType().c_str();
+        Json::Value actualChecksumValue = Json::UInt64(digest.getHashValue());
+        return ((actualChecksumAlgorithm == expectedImage[kJsonKey_Image_ChecksumAlgorithm]) &&
+                (actualChecksumValue == expectedImage[kJsonKey_Image_ChecksumValue]));
+    }
+
+    void ImageResultsAndExpectations::writeToFile(const char *filename) const {
+        Json::Value header;
+        header[kJsonKey_Header_Type] = kJsonValue_Header_Type;
+        header[kJsonKey_Header_Revision] = kJsonValue_Header_Revision;
+        Json::Value root;
+        root[kJsonKey_Header] = header;
+        root[kJsonKey_ActualResults] = fActualResults;
+        std::string jsonStdString = root.toStyledString();
+        SkFILEWStream stream(filename);
+        stream.write(jsonStdString.c_str(), jsonStdString.length());
+    }
+
+    /*static*/ bool ImageResultsAndExpectations::Parse(SkFILE *filePtr,
+                                                       Json::Value *jsonRoot) {
+        SkAutoDataUnref dataRef(SkData::NewFromFILE(filePtr));
+        if (NULL == dataRef.get()) {
+            return false;
+        }
+
+        const char *bytes = reinterpret_cast<const char *>(dataRef.get()->data());
+        size_t size = dataRef.get()->size();
+        Json::Reader reader;
+        if (!reader.parse(bytes, bytes+size, *jsonRoot)) {
+            return false;
+        }
+
+        return true;
+    }
+
+} // namespace sk_tools