skia2/gm/gm_expectations.h
commit-bot@chromium.org e3bb3bce3e Add JSON output option to bench.
A new command-line flag --outResultsFile takes the filename to write the JSON into.

The human readable output is the same as before with one exception. Previously DEBUG would be printed if in debug mode, or nothing would be printed if in release mode. Now this is reported as a named option:

  build=DEBUG

or

  build=RELEASE

R=djsollen@google.com, bsalomon@google.com

Author: jcgregorio@google.com

Review URL: https://codereview.chromium.org/83863002

git-svn-id: http://skia.googlecode.com/svn/trunk@12465 2bbb7eff-a529-9590-31e7-b0007b416f81
2013-12-03 18:16:48 +00:00

274 lines
8.5 KiB
C++

/*
* 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 gm_expectations_DEFINED
#define gm_expectations_DEFINED
#include "gm.h"
#include "SkBitmap.h"
#include "SkBitmapHasher.h"
#include "SkData.h"
#include "SkJSONCPP.h"
#include "SkOSFile.h"
#include "SkRefCnt.h"
#include "SkStream.h"
#include "SkTArray.h"
namespace skiagm {
void gm_fprintf(FILE *stream, const char format[], ...);
Json::Value CreateJsonTree(Json::Value expectedResults,
Json::Value actualResultsFailed,
Json::Value actualResultsFailureIgnored,
Json::Value actualResultsNoComparison,
Json::Value actualResultsSucceeded);
/**
* The digest of a GM test result.
*
* Currently, this is always a uint64_t hash digest of an SkBitmap...
* but we will add other flavors soon.
*/
class GmResultDigest {
public:
/**
* Create a ResultDigest representing an actual image result.
*/
explicit GmResultDigest(const SkBitmap &bitmap);
/**
* Create a ResultDigest representing an allowed result
* checksum within JSON expectations file, in the form
* ["bitmap-64bitMD5", 12345].
*/
explicit GmResultDigest(const Json::Value &jsonTypeValuePair);
/**
* Returns true if this GmResultDigest was fully and successfully
* created.
*/
bool isValid() const;
/**
* Returns true if this and other GmResultDigest could
* represent identical results.
*/
bool equals(const GmResultDigest &other) const;
/**
* Returns a JSON type/value pair representing this result,
* such as ["bitmap-64bitMD5", 12345].
*/
Json::Value asJsonTypeValuePair() const;
/**
* Returns the hashtype, such as "bitmap-64bitMD5", as an SkString.
*/
SkString getHashType() const;
/**
* Returns the hash digest value, such as "12345", as an SkString.
*/
SkString getDigestValue() const;
private:
bool fIsValid; // always check this first--if it's false, other fields are meaningless
uint64_t fHashDigest;
};
/**
* Encapsulates an SkBitmap and its GmResultDigest, guaranteed to keep them in sync.
*/
class BitmapAndDigest {
public:
explicit BitmapAndDigest(const SkBitmap &bitmap) : fBitmap(bitmap), fDigest(bitmap) {}
const SkBitmap fBitmap;
const GmResultDigest fDigest;
};
/**
* Test expectations (allowed image results, etc.)
*/
class Expectations {
public:
/**
* No expectations at all.
*/
explicit Expectations(bool ignoreFailure=kDefaultIgnoreFailure);
/**
* Expect exactly one image (appropriate for the case when we
* are comparing against a single PNG file).
*/
explicit Expectations(const SkBitmap& bitmap, bool ignoreFailure=kDefaultIgnoreFailure);
/**
* Expect exactly one image, whose digest has already been computed.
*/
explicit Expectations(const BitmapAndDigest& bitmapAndDigest);
/**
* Create Expectations from a JSON element as found within the
* kJsonKey_ExpectedResults section.
*
* It's fine if the jsonElement is null or empty; in that case, we just
* don't have any expectations.
*/
explicit Expectations(Json::Value jsonElement);
/**
* Returns true iff we want to ignore failed expectations.
*/
bool ignoreFailure() const { return this->fIgnoreFailure; }
/**
* Override default setting of fIgnoreFailure.
*/
void setIgnoreFailure(bool val) { this->fIgnoreFailure = val; }
/**
* Returns true iff there are no allowed results.
*/
bool empty() const { return this->fAllowedResultDigests.empty(); }
/**
* Returns true iff resultDigest matches any allowed result,
* regardless of fIgnoreFailure. (The caller can check
* that separately.)
*/
bool match(GmResultDigest resultDigest) const;
/**
* If this Expectation is based on a single SkBitmap, return a
* pointer to that SkBitmap. Otherwise (if the Expectation is
* empty, or if it was based on a list of checksums rather
* than a single bitmap), returns NULL.
*/
const SkBitmap *asBitmap() const {
return (SkBitmap::kNo_Config == fBitmap.config()) ? NULL : &fBitmap;
}
/**
* Return a JSON representation of the expectations.
*/
Json::Value asJsonValue() const;
private:
const static bool kDefaultIgnoreFailure = false;
SkTArray<GmResultDigest> fAllowedResultDigests;
bool fIgnoreFailure;
SkBitmap fBitmap;
};
/**
* Abstract source of Expectations objects for individual tests.
*/
class ExpectationsSource : public SkRefCnt {
public:
SK_DECLARE_INST_COUNT(ExpectationsSource)
virtual Expectations get(const char *testName) const = 0;
private:
typedef SkRefCnt INHERITED;
};
/**
* Return Expectations based on individual image files on disk.
*/
class IndividualImageExpectationsSource : public ExpectationsSource {
public:
/**
* Create an ExpectationsSource that will return Expectations based on
* image files found within rootDir.
*
* rootDir: directory under which to look for image files
* (this string will be copied to storage within this object)
*/
explicit IndividualImageExpectationsSource(const char *rootDir) : fRootDir(rootDir) {}
Expectations get(const char *testName) const SK_OVERRIDE ;
private:
const SkString fRootDir;
};
/**
* Return Expectations based on JSON summary file.
*/
class JsonExpectationsSource : public ExpectationsSource {
public:
/**
* Create an ExpectationsSource that will return Expectations based on
* a JSON file.
*
* jsonPath: path to JSON file to read
*/
explicit JsonExpectationsSource(const char *jsonPath);
Expectations get(const char *testName) const SK_OVERRIDE;
private:
/**
* Read as many bytes as possible (up to maxBytes) from the stream into
* an SkData object.
*
* If the returned SkData contains fewer than maxBytes, then EOF has been
* reached and no more data would be available from subsequent calls.
* (If EOF has already been reached, then this call will return an empty
* SkData object immediately.)
*
* If there are fewer than maxBytes bytes available to read from the
* stream, but the stream has not been closed yet, this call will block
* until there are enough bytes to read or the stream has been closed.
*
* It is up to the caller to call unref() on the returned SkData object
* once the data is no longer needed, so that the underlying buffer will
* be freed. For example:
*
* {
* size_t maxBytes = 256;
* SkAutoDataUnref dataRef(readIntoSkData(stream, maxBytes));
* if (NULL != dataRef.get()) {
* size_t bytesActuallyRead = dataRef.get()->size();
* // use the data...
* }
* }
* // underlying buffer has been freed, thanks to auto unref
*
*/
// TODO(epoger): Move this, into SkStream.[cpp|h] as attempted in
// https://codereview.appspot.com/7300071 ?
// And maybe ReadFileIntoSkData() also?
static SkData* ReadIntoSkData(SkStream &stream, size_t maxBytes);
/**
* Wrapper around ReadIntoSkData for files: reads the entire file into
* an SkData object.
*/
static SkData* ReadFileIntoSkData(SkFILEStream &stream) {
return ReadIntoSkData(stream, stream.getLength());
}
/**
* Read the file contents from jsonPath and parse them into jsonRoot.
*
* Returns true if successful.
*/
static bool Parse(const char *jsonPath, Json::Value *jsonRoot);
Json::Value fJsonRoot;
Json::Value fJsonExpectedResults;
};
}
#endif