dryRun flag for gm

gm/gmmain.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * Code for the "gm" (Golden Master) rendering comparison tool.
  *
@@ skipping 1403 matching lines @@
 // Macro magic to convert a numeric preprocessor token into a string.
 // Adapted from http://stackoverflow.com/questions/240353/convert-a-preprocessor-token-to-a-string
 // This should probably be moved into one of our common headers...
 #define TOSTRING_INTERNAL(x) #x
 #define TOSTRING(x) TOSTRING_INTERNAL(x)
 
 // Alphabetized ignoring "no" prefix ("readPath", "noreplay", "resourcePath").
 DEFINE_string(config, "", configUsage().c_str());
 DEFINE_string(pdfRasterizers, "default", pdfRasterizerUsage().c_str());
 DEFINE_bool(deferred, false, "Exercise the deferred rendering test pass.");
+DEFINE_bool(dryRun, false, "Don't actually run the tests, just print what would have been done.");
 DEFINE_string(excludeConfig, "", "Space delimited list of configs to skip.");
 DEFINE_bool(forceBWtext, false, "Disable text anti-aliasing.");
 #if SK_SUPPORT_GPU
 DEFINE_string(gpuCacheSize, "", "<bytes> <count>: Limit the gpu cache to byte size or "
               "object count. " TOSTRING(DEFAULT_CACHE_VALUE) " for either value means "
               "use the default. 0 for either disables the cache.");
 #endif
 DEFINE_bool(hierarchy, false, "Whether to use multilevel directory structure "
             "when reading/writing files.");
 DEFINE_string(ignoreErrorTypes, kDefaultIgnorableErrorTypes.asString(" ").c_str(),
@@ skipping 796 matching lines @@
     int moduloRemainder = -1;
     int moduloDivisor = -1;
     SkTDArray<const PDFRasterizerData*> pdfRasterizers;
     SkTDArray<SkScalar> tileGridReplayScales;
 #if SK_SUPPORT_GPU
     GrContextFactory* grFactory = new GrContextFactory;
 #else
     GrContextFactory* grFactory = NULL;
 #endif
 
+    if (FLAGS_dryRun) {
+        SkDebugf( "Doing a dry run; no tests will actually be executed.\n");
+    }
+
     if (!parse_flags_modulo(&moduloRemainder, &moduloDivisor) ||
         !parse_flags_ignore_error_types(&gmmain.fIgnorableErrorTypes) ||
         !parse_flags_ignore_tests(gmmain.fIgnorableTestNames) ||
 #if SK_SUPPORT_GPU
         !parse_flags_gpu_cache(&gGpuCacheSizeBytes, &gGpuCacheSizeCount) ||
 #endif
         !parse_flags_tile_grid_replay_scales(&tileGridReplayScales) ||
         !parse_flags_resource_path() ||
         !parse_flags_jpeg_quality() ||
         !parse_flags_configs(&configs, grFactory) ||
@@ skipping 18 matching lines @@
         }
         if (FLAGS_resourcePath.count() == 1) {
             SkDebugf("reading resources from %s\n", FLAGS_resourcePath[0]);
         }
     }
 
     int gmsRun = 0;
     int gmIndex = -1;
     SkString moduloStr;
 
-    // If we will be writing out files, prepare subdirectories.
-    if (FLAGS_writePath.count() == 1) {
-        if (!prepare_subdirectories(FLAGS_writePath[0], gmmain.fUseFileHierarchy,
-                                    configs, pdfRasterizers)) {
-            return -1;
+    if (!FLAGS_dryRun) {
+        // If we will be writing out files, prepare subdirectories.
+        if (FLAGS_writePath.count() == 1) {
+            if (!prepare_subdirectories(FLAGS_writePath[0], gmmain.fUseFileHierarchy,
+                                        configs, pdfRasterizers)) {
+                return -1;
+            }
+        }
+        if (NULL != gmmain.fMismatchPath) {
+            if (!prepare_subdirectories(gmmain.fMismatchPath, gmmain.fUseFileHierarchy,
+                                        configs, pdfRasterizers)) {
+                return -1;
+            }
+        }
+        if (NULL != gmmain.fMissingExpectationsPath) {
+            if (!prepare_subdirectories(gmmain.fMissingExpectationsPath, gmmain.fUseFileHierarchy,
+                                        configs, pdfRasterizers)) {
+                return -1;
+            }
         }
     }
-    if (NULL != gmmain.fMismatchPath) {
-        if (!prepare_subdirectories(gmmain.fMismatchPath, gmmain.fUseFileHierarchy,
-                                    configs, pdfRasterizers)) {
-            return -1;
-        }
-    }
-    if (NULL != gmmain.fMissingExpectationsPath) {
-        if (!prepare_subdirectories(gmmain.fMissingExpectationsPath, gmmain.fUseFileHierarchy,
-                                    configs, pdfRasterizers)) {
-            return -1;
-        }
-    }
-
     Iter iter;
     GM* gm;
     while ((gm = iter.next()) != NULL) {
         if (FLAGS_forcePerspectiveMatrix) {
             SkMatrix perspective;
             perspective.setIdentity();
             perspective.setPerspY(SkScalarDiv(SK_Scalar1, SkIntToScalar(1000)));
             perspective.setSkewX(SkScalarDiv(SkIntToScalar(8),
                                  SkIntToScalar(25)));
 
@@ skipping 11 matching lines @@
         const char* shortName = gm->getName();
 
         if (SkCommandLineFlags::ShouldSkip(FLAGS_match, shortName)) {
             continue;
         }
 
         gmsRun++;
         SkISize size = gm->getISize();
         SkDebugf("%sdrawing... %s [%d %d]\n", moduloStr.c_str(), shortName,
                  size.width(), size.height());
+        if (!FLAGS_dryRun)
+            run_multiple_configs(gmmain, gm, configs, pdfRasterizers, tileGridReplayScales, grFactory);
+    }
 
-        run_multiple_configs(gmmain, gm, configs, pdfRasterizers, tileGridReplayScales, grFactory);
-    }
+    if (FLAGS_dryRun)
+        return 0;
 
     SkTArray<SkString> modes;
     gmmain.GetRenderModesEncountered(modes);
     int modeCount = modes.count();
 
     // Now that we have run all the tests and thus know the full set of renderModes that we
     // tried to run, we can call RecordTestResults() to record the cases in which we skipped
     // ALL renderModes.
     // See http://skbug.com/1994 and https://codereview.chromium.org/129203002/
     int testCount = gmmain.fTestsSkippedOnAllRenderModes.count();
@@ skipping 90 matching lines @@
     if (FLAGS_forceBWtext) {
         canvas->setDrawFilter(SkNEW(BWTextDrawFilter))->unref();
     }
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif