extract some common code from PictureRenderer

tools/PictureRenderer.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "PictureRenderer.h"
 #include "picture_utils.h"
 #include "SamplePipeControllers.h"
@@ skipping 30 matching lines @@
     return SkScalarLog(x) * log2_conversion_factor;
 }
 
 namespace sk_tools {
 
 enum {
     kDefaultTileWidth = 256,
     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);
     this->CopyString(&fInputFilename, inputFilename);
     fUseChecksumBasedFilenames = useChecksumBasedFilenames;
 
     SkASSERT(NULL == fPicture);
     SkASSERT(NULL == fCanvas.get());
     if (NULL != fPicture || NULL != fCanvas.get()) {
         return;
@@ skipping 238 matching lines @@
     // TODO(epoger): what about including the config type within outputFilename?  That way,
     // we could combine results of different config types without conflicting filenames.
     SkString outputFilename;
     const char *outputSubdirPtr = NULL;
     if (useChecksumBasedFilenames) {
         SkASSERT(!generatedHash);
         SkAssertResult(SkBitmapHasher::ComputeDigest(bitmap, &hash));
         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);
         if (NULL != tileNumberPtr) {
             outputFilename.append("-tile");
             outputFilename.appendS32(*tileNumberPtr);
         }
     }
     outputFilename.append(".png");
 
@@ skipping 630 matching lines @@
     virtual SkString getConfigNameInternal() SK_OVERRIDE {
         return SkString("picture_clone");
     }
 };
 
 PictureRenderer* CreatePictureCloneRenderer() {
     return SkNEW(PictureCloneRenderer);
 }
 
 } // namespace sk_tools