When was SkPDiff last used?

tools/skpdiff/SkDiffContext.h

Index: tools/skpdiff/SkDiffContext.h
diff --git a/tools/skpdiff/SkDiffContext.h b/tools/skpdiff/SkDiffContext.h
deleted file mode 100644
index 863eadedfb73d1ff6cae5d237a8fbe45fbbfff91..0000000000000000000000000000000000000000
--- a/tools/skpdiff/SkDiffContext.h
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-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkDiffContext_DEFINED
-#define SkDiffContext_DEFINED
-
-#include "SkImageDiffer.h"
-#include "SkMutex.h"
-#include "SkString.h"
-#include "SkTArray.h"
-#include "SkTDArray.h"
-#include "SkTLList.h"
-
-class SkWStream;
-
-/**
- * Collects records of diffs and outputs them as JSON.
- */
-class SkDiffContext {
-public:
-    SkDiffContext();
-    ~SkDiffContext();
-
-    void setThreadCount(int threadCount) { fThreadCount = threadCount; }
-
-    /**
-     * Sets the directory within which to store alphaMasks (images that
-     * are transparent for each pixel that differs between baseline and test).
-     *
-     * If the directory does not exist yet, it will be created.
-     */
-    void setAlphaMaskDir(const SkString& directory);
-
-    /**
-     * Sets the directory within which to store rgbDiffs (images showing the
-     * per-channel difference between baseline and test at each pixel).
-     *
-     * If the directory does not exist yet, it will be created.
-     */
-    void setRgbDiffDir(const SkString& directory);
-
-    /**
-     * Sets the directory within which to store whiteDiffs (images showing white
-     * for each pixel that differs between baseline and test).
-     *
-     * If the directory does not exist yet, it will be created.
-     */
-    void setWhiteDiffDir(const SkString& directory);
-
-    /**
-     * Modify the pattern used to generate commonName (= the
-     * basename of rgb/white diff files).
-     *
-     * - true: basename is a combination of the input file names.
-     * - false: basename is the common prefix of the input file names.
-     *
-     * For example, for:
-     *   baselinePath=/tmp/dir/image-before.png
-     *   testPath=/tmp/dir/image-after.png
-     *
-     * If setLongNames(true), commonName would be:
-     *    image-before-png-vs-image-after-png.png
-     *
-     * If setLongNames(false), commonName would be:
-     *   image-.png
-     */
-    void setLongNames(const bool useLongNames);
-
-    /**
-     * Sets the differs to be used in each diff. Already started diffs will not retroactively use
-     * these.
-     * @param differs An array of differs to use. The array is copied, but not the differs
-     *                themselves.
-     */
-    void setDiffers(const SkTDArray<SkImageDiffer*>& differs);
-
-    /**
-     * Compares two directories of images with the given differ
-     * @param baselinePath The baseline directory's path
-     * @param testPath     The test directory's path
-     */
-    void diffDirectories(const char baselinePath[], const char testPath[]);
-
-    /**
-     * Compares two sets of images identified by glob style patterns with the given differ
-     * @param baselinePattern A pattern for baseline files
-     * @param testPattern     A pattern for test files that matches each file of the baseline file
-     */
-    void diffPatterns(const char baselinePattern[], const char testPattern[]);
-
-    /**
-     * Compares the images at the given paths
-     * @param baselinePath The baseline file path
-     * @param testPath     The matching test file path
-     */
-    void addDiff(const char* baselinePath, const char* testPath);
-
-    /**
-     * Output the records of each diff in JSON.
-     *
-     * The format of the JSON document is one top level array named "records".
-     * Each record in the array is an object with the following values:
-     *    "commonName"     : string containing the output filename (basename)
-     *                       depending on the value of 'longNames'.
-     *                       (see 'setLongNames' for an explanation and example).
-     *    "baselinePath"   : string containing the path to the baseline image
-     *    "testPath"       : string containing the path to the test image
-     *    "differencePath" : (optional) string containing the path to an alpha
-     *                       mask of the pixel difference between the baseline
-     *                       and test images
-     *                       TODO(epoger): consider renaming this "alphaMaskPath"
-     *                       to distinguish from other difference types?
-     *    "rgbDiffPath"    : (optional) string containing the path to a bitmap
-     *                       showing per-channel differences between the
-     *                       baseline and test images at each pixel
-     *    "whiteDiffPath"  : (optional) string containing the path to a bitmap
-     *                       showing every pixel that differs between the
-     *                       baseline and test images as white
-     *
-     * They also have an array named "diffs" with each element being one diff record for the two
-     * images indicated in the above field.
-     * A diff record includes:
-     *    "differName"       : string name of the diff metric used
-     *    "result"           : numerical result of the diff
-     *
-     * Here is an example:
-     *
-     * {
-     *     "records": [
-     *         {
-     *             "commonName": "queue.png",
-     *             "baselinePath": "/a/queue.png",
-     *             "testPath": "/b/queue.png",
-     *             "diffs": [
-     *                 {
-     *                     "differName": "different_pixels",
-     *                     "result": 1,
-     *                 }
-     *             ]
-     *         }
-     *     ]
-     * }
-     *
-     * @param stream   The stream to output the diff to
-     * @param useJSONP True to adding padding to the JSON output to make it cross-site requestable.
-     */
-    void outputRecords(SkWStream& stream, bool useJSONP);
-
-    /**
-     * Output the records score in csv format.
-     */
-    void outputCsv(SkWStream& stream);
-
-
-private:
-    struct DiffData {
-        const char* fDiffName;
-        SkImageDiffer::Result fResult;
-    };
-
-    struct DiffRecord {
-        // TODO(djsollen): Some of these fields are required, while others are optional
-        // (e.g., fRgbDiffPath is only filled in if SkDifferentPixelsMetric
-        // was run).  Figure out a way to note that.  See https://bug.skia.org/2712
-        // ('allow skpdiff to report different sets of result fields for
-        // different comparison algorithms')
-        SkString           fCommonName;
-        SkString           fAlphaMaskPath;
-        SkString           fRgbDiffPath;
-        SkString           fWhiteDiffPath;
-        SkString           fBaselinePath;
-        SkString               fTestPath;
-        SkISize                    fSize;
-        int                  fMaxRedDiff;
-        int                fMaxGreenDiff;
-        int                 fMaxBlueDiff;
-        SkTArray<DiffData>        fDiffs;
-    };
-
-    // Used to protect access to fRecords and ensure only one thread is
-    // adding new entries at a time.
-    SkMutex fRecordMutex;
-
-    // We use linked list for the records so that their pointers remain stable. A resizable array
-    // might change its pointers, which would make it harder for async diffs to record their
-    // results.
-    typedef SkTLList<DiffRecord, 1> RecordList;
-    RecordList fRecords;
-
-    SkImageDiffer** fDiffers;
-    int fDifferCount;
-    int fThreadCount;
-
-    SkString fAlphaMaskDir;
-    SkString fRgbDiffDir;
-    SkString fWhiteDiffDir;
-    bool longNames;
-};
-
-#endif