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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.
*/
#include "gm_expectations.h"
#include "SkBitmapHasher.h"
#include "SkImageDecoder.h"
#define DEBUGFAIL_SEE_STDERR SkDEBUGFAIL("see stderr for message")
const static char kJsonKey_ActualResults[] = "actual-results";
const static char kJsonKey_ActualResults_Failed[] = "failed";
const static char kJsonKey_ActualResults_FailureIgnored[]= "failure-ignored";
const static char kJsonKey_ActualResults_NoComparison[] = "no-comparison";
const static char kJsonKey_ActualResults_Succeeded[] = "succeeded";
const static char kJsonKey_ActualResults_AnyStatus_BitmapCityhash[] = "bitmap-cityhash";
const static char kJsonKey_ExpectedResults[] = "expected-results";
const static char kJsonKey_ExpectedResults_AllowedBitmapCityhashes[] = "allowed-bitmap-cityhashes";
const static char kJsonKey_ExpectedResults_IgnoreFailure[] = "ignore-failure";
namespace skiagm {
// TODO(epoger): This currently assumes that the result SkHashDigest was
// generated as a CityHash of an SkBitmap. We'll need to allow for other
// hash types to cover non-bitmaps, MD5 instead of CityHash, etc.
Json::Value ActualResultAsJsonValue(const SkHashDigest& result) {
Json::Value jsonValue;
jsonValue[kJsonKey_ActualResults_AnyStatus_BitmapCityhash] = asJsonValue(result);
return jsonValue;
}
Json::Value CreateJsonTree(Json::Value expectedResults,
Json::Value actualResultsFailed,
Json::Value actualResultsFailureIgnored,
Json::Value actualResultsNoComparison,
Json::Value actualResultsSucceeded) {
Json::Value actualResults;
actualResults[kJsonKey_ActualResults_Failed] = actualResultsFailed;
actualResults[kJsonKey_ActualResults_FailureIgnored] = actualResultsFailureIgnored;
actualResults[kJsonKey_ActualResults_NoComparison] = actualResultsNoComparison;
actualResults[kJsonKey_ActualResults_Succeeded] = actualResultsSucceeded;
Json::Value root;
root[kJsonKey_ActualResults] = actualResults;
root[kJsonKey_ExpectedResults] = expectedResults;
return root;
}
// Expectations class...
Expectations::Expectations(bool ignoreFailure) {
fIgnoreFailure = ignoreFailure;
}
Expectations::Expectations(const SkBitmap& bitmap, bool ignoreFailure) {
fBitmap = bitmap;
fIgnoreFailure = ignoreFailure;
SkHashDigest digest;
// TODO(epoger): Better handling for error returned by ComputeDigest()?
// For now, we just report a digest of 0 in error cases, like before.
if (!SkBitmapHasher::ComputeDigest(bitmap, &digest)) {
digest = 0;
}
fAllowedBitmapCityhashes.push_back() = digest;
}
Expectations::Expectations(Json::Value jsonElement) {
if (jsonElement.empty()) {
fIgnoreFailure = kDefaultIgnoreFailure;
} else {
Json::Value ignoreFailure = jsonElement[kJsonKey_ExpectedResults_IgnoreFailure];
if (ignoreFailure.isNull()) {
fIgnoreFailure = kDefaultIgnoreFailure;
} else if (!ignoreFailure.isBool()) {
gm_fprintf(stderr, "found non-boolean json value"
" for key '%s' in element '%s'\n",
kJsonKey_ExpectedResults_IgnoreFailure,
jsonElement.toStyledString().c_str());
DEBUGFAIL_SEE_STDERR;
fIgnoreFailure = kDefaultIgnoreFailure;
} else {
fIgnoreFailure = ignoreFailure.asBool();
}
Json::Value allowedChecksums =
jsonElement[kJsonKey_ExpectedResults_AllowedBitmapCityhashes];
if (allowedChecksums.isNull()) {
// ok, we'll just assume there aren't any expected checksums to compare against
} else if (!allowedChecksums.isArray()) {
gm_fprintf(stderr, "found non-array json value"
" for key '%s' in element '%s'\n",
kJsonKey_ExpectedResults_AllowedBitmapCityhashes,
jsonElement.toStyledString().c_str());
DEBUGFAIL_SEE_STDERR;
} else {
for (Json::ArrayIndex i=0; i<allowedChecksums.size(); i++) {
Json::Value checksumElement = allowedChecksums[i];
if (!checksumElement.isIntegral()) {
gm_fprintf(stderr, "found non-integer checksum"
" in json element '%s'\n",
jsonElement.toStyledString().c_str());
DEBUGFAIL_SEE_STDERR;
} else {
fAllowedBitmapCityhashes.push_back() = asChecksum(checksumElement);
}
}
}
}
}
bool Expectations::match(Checksum actualChecksum) const {
for (int i=0; i < this->fAllowedBitmapCityhashes.count(); i++) {
Checksum allowedChecksum = this->fAllowedBitmapCityhashes[i];
if (allowedChecksum == actualChecksum) {
return true;
}
}
return false;
}
Json::Value Expectations::asJsonValue() const {
Json::Value allowedChecksumArray;
if (!this->fAllowedBitmapCityhashes.empty()) {
for (int i=0; i < this->fAllowedBitmapCityhashes.count(); i++) {
Checksum allowedChecksum = this->fAllowedBitmapCityhashes[i];
allowedChecksumArray.append(Json::UInt64(allowedChecksum));
}
}
Json::Value jsonValue;
jsonValue[kJsonKey_ExpectedResults_AllowedBitmapCityhashes] = allowedChecksumArray;
jsonValue[kJsonKey_ExpectedResults_IgnoreFailure] = this->ignoreFailure();
return jsonValue;
}
// IndividualImageExpectationsSource class...
Expectations IndividualImageExpectationsSource::get(const char *testName) {
SkString path = make_filename(fRootDir.c_str(), "", testName,
"png");
SkBitmap referenceBitmap;
bool decodedReferenceBitmap =
SkImageDecoder::DecodeFile(path.c_str(), &referenceBitmap,
SkBitmap::kARGB_8888_Config,
SkImageDecoder::kDecodePixels_Mode,
NULL);
if (decodedReferenceBitmap) {
return Expectations(referenceBitmap);
} else {
return Expectations();
}
}
// JsonExpectationsSource class...
JsonExpectationsSource::JsonExpectationsSource(const char *jsonPath) {
parse(jsonPath, &fJsonRoot);
fJsonExpectedResults = fJsonRoot[kJsonKey_ExpectedResults];
}
Expectations JsonExpectationsSource::get(const char *testName) {
return Expectations(fJsonExpectedResults[testName]);
}
/*static*/ SkData* JsonExpectationsSource::readIntoSkData(SkStream &stream, size_t maxBytes) {
if (0 == maxBytes) {
return SkData::NewEmpty();
}
char* bufStart = reinterpret_cast<char *>(sk_malloc_throw(maxBytes));
char* bufPtr = bufStart;
size_t bytesRemaining = maxBytes;
while (bytesRemaining > 0) {
size_t bytesReadThisTime = stream.read(bufPtr, bytesRemaining);
if (0 == bytesReadThisTime) {
break;
}
bytesRemaining -= bytesReadThisTime;
bufPtr += bytesReadThisTime;
}
return SkData::NewFromMalloc(bufStart, maxBytes - bytesRemaining);
}
/*static*/ bool JsonExpectationsSource::parse(const char *jsonPath, Json::Value *jsonRoot) {
SkFILEStream inFile(jsonPath);
if (!inFile.isValid()) {
gm_fprintf(stderr, "unable to read JSON file %s\n", jsonPath);
DEBUGFAIL_SEE_STDERR;
return false;
}
SkAutoDataUnref dataRef(readFileIntoSkData(inFile));
if (NULL == dataRef.get()) {
gm_fprintf(stderr, "error reading JSON file %s\n", jsonPath);
DEBUGFAIL_SEE_STDERR;
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)) {
gm_fprintf(stderr, "error parsing JSON file %s\n", jsonPath);
DEBUGFAIL_SEE_STDERR;
return false;
}
return true;
}
}
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