Renable image benchmarking

- Remove --images '' to renable image benchmarking
- Add a flag to disable testing JPEG's buildTileIndex, since it also leaks memory
- Do not run images on GPU
- Do not run large interlaced images on 32 bit bots
- When buildTileIndex is not being used in the subset benches, do not use it for BRD

BUG=skia:3418
BUG=skia:4469
BUG=skia:4471
BUG=skia:4360

Review URL: https://codereview.chromium.org/1396113002

bench/nanobench.cpp

@@ -112,6 +112,7 @@ DEFINE_int32(flushEvery, 10, "Flush --outResultsFile every Nth run.");
 DEFINE_bool(resetGpuContext, true, "Reset the GrContext before running each test.");
 DEFINE_bool(gpuStats, false, "Print GPU stats after each gpu benchmark?");
 DEFINE_bool(pngBuildTileIndex, false, "If supported, use png buildTileIndex/decodeSubset.");
+DEFINE_bool(jpgBuildTileIndex, false, "If supported, use jpg buildTileIndex/decodeSubset.");
 
 static SkString humanize(double ms) {
     if (FLAGS_verbose) return SkStringPrintf("%llu", (uint64_t)(ms*1e6));
@@ -513,9 +514,11 @@ static bool run_subset_bench(const SkString& path, bool useCodec) {
         "JPG", "JPEG",
     };
 
-    for (uint32_t i = 0; i < SK_ARRAY_COUNT(exts); i++) {
-        if (path.endsWith(exts[i])) {
-            return true;
+    if (useCodec || FLAGS_jpgBuildTileIndex) {
+        for (uint32_t i = 0; i < SK_ARRAY_COUNT(exts); i++) {
+            if (path.endsWith(exts[i])) {
+                return true;
+            }
         }
     }
 
@@ -983,12 +986,34 @@ public:
             while (fCurrentBRDStrategy < (int) SK_ARRAY_COUNT(strategies)) {
                 fSourceType = "image";
                 fBenchType = strategies[fCurrentBRDStrategy].fName;
+
+                const SkString& path = fImages[fCurrentBRDImage];
+                const SkBitmapRegionDecoderInterface::Strategy strategy =
+                        strategies[fCurrentBRDStrategy].fStrategy;
+
+                if (SkBitmapRegionDecoderInterface::kOriginal_Strategy == strategy) {
+                    // Disable png and jpeg for SkImageDecoder:
+                    if (!FLAGS_jpgBuildTileIndex) {
+                        if (path.endsWith("JPEG") || path.endsWith("JPG") ||
+                            path.endsWith("jpeg") || path.endsWith("jpg"))
+                        {
+                            fCurrentBRDStrategy++;
+                            continue;
+                        }
+                    }
+                    if (!FLAGS_pngBuildTileIndex) {
+                        if (path.endsWith("PNG") || path.endsWith("png")) {
+                            fCurrentBRDStrategy++;
+                            continue;
+                        }
+                    }
+                }
+
                 while (fCurrentColorType < fColorTypes.count()) {
                     while (fCurrentBRDSampleSize < (int) SK_ARRAY_COUNT(sampleSizes)) {
                         while (fCurrentSubsetType <= kLastSingle_SubsetType) {
-                            const SkString& path = fImages[fCurrentBRDImage];
-                            const SkBitmapRegionDecoderInterface::Strategy strategy =
-                                    strategies[fCurrentBRDStrategy].fStrategy;
+
+
                             SkAutoTUnref<SkData> encoded(SkData::NewFromFileName(path.c_str()));
                             const SkColorType colorType = fColorTypes[fCurrentColorType];
                             uint32_t sampleSize = sampleSizes[fCurrentBRDSampleSize];

tools/nanobench_flags.json

@@ -15,10 +15,12 @@
     "~blurroundrect", 
     "~patch_grid", 
     "~desk_carsvg", 
-    "~desk_unicodetable"
+    "~desk_unicodetable", 
+    "~interlaced1.png", 
+    "~interlaced2.png", 
+    "~interlaced3.png"
   ], 
   "Perf-Android-Nexus7-Tegra3-Arm7-Release": [
-    "--images", 
     "--scales", 
     "1.0", 
     "1.1", 
@@ -71,7 +73,11 @@
     "--loops", 
     "1", 
     "--samples", 
-    "1"
+    "1", 
+    "--match", 
+    "~interlaced1.png", 
+    "~interlaced2.png", 
+    "~interlaced3.png"
   ], 
   "Test-Win7-MSVC-ShuttleA-GPU-HD2000-x86-Debug-ANGLE": [
     "--images", 
@@ -93,7 +99,10 @@
     "256", 
     "--match", 
     "~gradient", 
-    "~etc1bitmap"
+    "~etc1bitmap", 
+    "~interlaced1.png", 
+    "~interlaced2.png", 
+    "~interlaced3.png"
   ], 
   "Test-iOS-Clang-iPad4-GPU-SGX554-Arm7-Debug": [
     "--images", 

tools/nanobench_flags.py

@@ -29,8 +29,8 @@ cov_start = lineno()+1   # We care about coverage starting just past this def.
 def get_args(bot):
   args = []
 
-  # Temporarily disable image benchmarking.
-  args.append('--images')
+  if 'GPU' in bot:
+    args.append('--images')
 
   if 'Appurify' not in bot:
     args.extend(['--scales', '1.0', '1.1'])
@@ -80,6 +80,17 @@ def get_args(bot):
     match.append('~keymobi')
     match.append('~path_hairline')
 
+  # the 32-bit GCE bots run out of memory in DM when running these large images
+  # so defensively disable them in nanobench, too.
+  # FIXME (scroggo): This may have just been due to SkImageDecoder's
+  # buildTileIndex leaking memory (skbug.com/4360). That is disabled by
+  # default for nanobench, so we may not need this.
+  # FIXME (scroggo): Share image blacklists between dm and nanobench?
+  if 'x86' in bot and not 'x86-64' in bot:
+    match.append('~interlaced1.png')
+    match.append('~interlaced2.png')
+    match.append('~interlaced3.png')
+
   if match:
     args.append('--match')
     args.extend(match)