reland "extract some common code from PictureRenderer"

tools/PictureRenderer.cpp

Index: tools/PictureRenderer.cpp
diff --git a/tools/PictureRenderer.cpp b/tools/PictureRenderer.cpp
index c712ae672fbfae196bc16504fef214b9d3bcbdd2..b5dc0fc93dad973a2d763731e46d195aeb836e92 100644
--- a/tools/PictureRenderer.cpp
+++ b/tools/PictureRenderer.cpp
@@ -48,67 +48,6 @@ enum {
     kDefaultTileHeight = 256
 };
 
-/*
- * 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_Header[] = "header";
-const static char kJsonKey_Header_Type[] = "type";
-const static char kJsonKey_Header_Revision[] = "revision";  // unique within Type
-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_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_NoComparison[] = "no-comparison";
-
-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;
-    } else {
-        fActualResults[sourceName][kJsonKey_Source_TiledImages][*tileNumber] = image;
-    }
-}
-
-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 ImageResultsSummary::writeToFile(const char *filename) {
-    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());
-}
-
 void PictureRenderer::init(SkPicture* pict, const SkString* outputDir,
                            const SkString* inputFilename, bool useChecksumBasedFilenames) {
     this->CopyString(&fOutputDir, outputDir);
@@ -367,8 +306,10 @@ static bool write(SkCanvas* canvas, const SkString& outputDir, const SkString& i
         generatedHash = true;
 
         outputSubdirPtr = escapedInputFilename.c_str();
-        outputFilename.set(kJsonValue_Image_ChecksumAlgorithm_Bitmap64bitMD5);
-        outputFilename.append("_");
+        // TODO(epoger): The string constant below will be removed when I land
+        // the second part of https://codereview.chromium.org/261313004/
+        // ('add --readJsonSummaryPath to render_pictures')
+        outputFilename.set("bitmap-64bitMD5_");
         outputFilename.appendU64(hash);
     } else {
         outputFilename.set(escapedInputFilename);