Enable gpu Debug markers if tracing category skia.gpu is enabled

src/gpu/GrContext.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.
  */
 
 
 #include "GrContext.h"
@@ skipping 92 matching lines @@
     fResourceCache = NULL;
     fFontCache = NULL;
     fDrawBuffer = NULL;
     fDrawBufferVBAllocPool = NULL;
     fDrawBufferIBAllocPool = NULL;
     fFlushToReduceCacheSize = false;
     fAARectRenderer = NULL;
     fOvalRenderer = NULL;
     fViewMatrix.reset();
     fMaxTextureSizeOverride = 1 << 20;
-    fGpuTracingEnabled = false;
+
+    // Check if the gpu.serivce category is set from tracing and enable GpuTracing if it is

[bsalomon, 2014/08/04 15:22:05]

Is it really right to do this only when the GrContext is created? In practice I
think that has usually already occurred before tracing is invoked.

+    const unsigned char *category_enabled = TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(
+        TRACE_DISABLED_BY_DEFAULT("gpu.service"));
+    if (*category_enabled != 0) {
+        fGpuTracingEnabled = true;
+    } else {
+         fGpuTracingEnabled = false;
+    }
 }
 
 bool GrContext::init(GrBackend backend, GrBackendContext backendContext) {
     SkASSERT(NULL == fGpu);
 
     fGpu = GrGpu::Create(backend, backendContext, this);
     if (NULL == fGpu) {
         return false;
     }
 
@@ skipping 1796 matching lines @@
         fDrawBuffer->removeGpuTraceMarker(marker);
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 #if GR_CACHE_STATS
 void GrContext::printCacheStats() const {
     fResourceCache->printStats();
 }
 #endif