add --readJsonSummaryPath to render_pictures

tools/image_expectations.cpp

Index: tools/image_expectations.cpp
diff --git a/tools/image_expectations.cpp b/tools/image_expectations.cpp
index 1ab53f24d34cfe1c80fc9cc55416e5cbbe906c6f..9b180da5feded20795c7e900a8cd2ff7cf9159c5 100644
--- a/tools/image_expectations.cpp
+++ b/tools/image_expectations.cpp
@@ -7,6 +7,7 @@
 
 #include "SkBitmap.h"
 #include "SkBitmapHasher.h"
+#include "SkData.h"
 #include "SkJSONCPP.h"
 #include "SkOSFile.h"
 #include "SkStream.h"
@@ -27,45 +28,125 @@
  * 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";  // unique within 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 {
 
-    void ImageResultsSummary::add(const char *sourceName, const char *fileName, uint64_t hash,
-                                  const int *tileNumber) {
-        Json::Value image;
-        image[kJsonKey_Image_ChecksumAlgorithm] = kJsonValue_Image_ChecksumAlgorithm_Bitmap64bitMD5;
-        image[kJsonKey_Image_ChecksumValue] = Json::UInt64(hash);
-        image[kJsonKey_Image_ComparisonResult] = kJsonValue_Image_ComparisonResult_NoComparison;
-        image[kJsonKey_Image_Filepath] = fileName;
-        if (NULL == tileNumber) {
-            fActualResults[sourceName][kJsonKey_Source_WholeImage] = image;
+    // 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 (Parse(jsonPath, &fExpectedJsonRoot)) {
+            fExpectedResults = fExpectedJsonRoot[kJsonKey_ExpectedResults];
+            return true;
         } else {
-            fActualResults[sourceName][kJsonKey_Source_TiledImages][*tileNumber] = image;
+            return false;
         }
     }
 
-    void ImageResultsSummary::add(const char *sourceName, const char *fileName, const SkBitmap& bitmap,
-                                  const int *tileNumber) {
-        uint64_t hash;
-        SkAssertResult(SkBitmapHasher::ComputeDigest(bitmap, &hash));
-        this->add(sourceName, fileName, hash, tileNumber);
+    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;
+        }
     }
 
-    void ImageResultsSummary::writeToFile(const char *filename) {
+    void ImageResultsAndExpectations::writeToFile(const char *filename) const {
         Json::Value header;
         header[kJsonKey_Header_Type] = kJsonValue_Header_Type;
         header[kJsonKey_Header_Revision] = kJsonValue_Header_Revision;
@@ -77,4 +158,23 @@ namespace sk_tools {
         stream.write(jsonStdString.c_str(), jsonStdString.length());
     }
 
+    /*static*/ bool ImageResultsAndExpectations::Parse(const char *jsonPath,
+                                                       Json::Value *jsonRoot) {
+        SkAutoDataUnref dataRef(SkData::NewFromFileName(jsonPath));
+        if (NULL == dataRef.get()) {
+            SkDebugf("error reading JSON file %s\n", jsonPath);
+            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)) {
+            SkDebugf("error parsing JSON file %s\n", jsonPath);
+            return false;
+        }
+
+        return true;
+    }
+
 } // namespace sk_tools