gpu: Update ANGLE Platform integration.

ui/gl/angle_platform_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/angle_platform_impl.h"
 
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/trace_event/trace_event.h"
+#include "third_party/angle/include/platform/Platform.h"
+#include "ui/gl/gl_bindings.h"
 
 namespace gl {
 
-ANGLEPlatformImpl::ANGLEPlatformImpl() {
-}
+namespace {
 
-ANGLEPlatformImpl::~ANGLEPlatformImpl() {
-}
-
-double ANGLEPlatformImpl::currentTime() {
+double ANGLEPlatformImpl_currentTime() {
   return base::Time::Now().ToDoubleT();
 }
 
-double ANGLEPlatformImpl::monotonicallyIncreasingTime() {
+double ANGLEPlatformImpl_monotonicallyIncreasingTime() {
   return (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF();
 }
 
-const unsigned char* ANGLEPlatformImpl::getTraceCategoryEnabledFlag(
+const unsigned char* ANGLEPlatformImpl_getTraceCategoryEnabledFlag(
     const char* category_group) {
   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 }
 
-void ANGLEPlatformImpl::logError(const char* errorMessage) {
+void ANGLEPlatformImpl_logError(const char* errorMessage) {
   LOG(ERROR) << errorMessage;
 }
 
-void ANGLEPlatformImpl::logWarning(const char* warningMessage) {
+void ANGLEPlatformImpl_logWarning(const char* warningMessage) {
   LOG(WARNING) << warningMessage;
 }
 
-angle::Platform::TraceEventHandle ANGLEPlatformImpl::addTraceEvent(
+angle::TraceEventHandle ANGLEPlatformImpl_addTraceEvent(
     char phase,
     const unsigned char* category_group_enabled,
     const char* name,
     unsigned long long id,
     double timestamp,
     int num_args,
     const char** arg_names,
     const unsigned char* arg_types,
     const unsigned long long* arg_values,
     unsigned char flags) {
   base::TimeTicks timestamp_tt =
       base::TimeTicks() + base::TimeDelta::FromSecondsD(timestamp);
   base::trace_event::TraceEventHandle handle =
       TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
           phase, category_group_enabled, name,
           trace_event_internal::kGlobalScope, id, trace_event_internal::kNoId,
           base::PlatformThread::CurrentId(), timestamp_tt, num_args, arg_names,
           arg_types, arg_values, nullptr, flags);
-  angle::Platform::TraceEventHandle result;
+  angle::TraceEventHandle result;
   memcpy(&result, &handle, sizeof(result));
   return result;
 }
 
-void ANGLEPlatformImpl::updateTraceEventDuration(
+void ANGLEPlatformImpl_updateTraceEventDuration(
     const unsigned char* category_group_enabled,
     const char* name,
-    TraceEventHandle handle) {
+    angle::TraceEventHandle handle) {
   base::trace_event::TraceEventHandle trace_event_handle;
   memcpy(&trace_event_handle, &handle, sizeof(handle));
   TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(category_group_enabled, name,
                                               trace_event_handle);
 }
 
-void ANGLEPlatformImpl::histogramCustomCounts(const char* name,
-                                              int sample,
-                                              int min,
-                                              int max,
-                                              int bucket_count) {
+void ANGLEPlatformImpl_histogramCustomCounts(const char* name,
+                                             int sample,
+                                             int min,
+                                             int max,
+                                             int bucket_count) {
   // Copied from histogram macro, but without the static variable caching
   // the histogram because name is dynamic.
   base::HistogramBase* counter = base::Histogram::FactoryGet(
       name, min, max, bucket_count,
       base::HistogramBase::kUmaTargetedHistogramFlag);
   DCHECK_EQ(name, counter->histogram_name());
   counter->Add(sample);
 }
 
-void ANGLEPlatformImpl::histogramEnumeration(const char* name,
-                                             int sample,
-                                             int boundary_value) {
+void ANGLEPlatformImpl_histogramEnumeration(const char* name,
+                                            int sample,
+                                            int boundary_value) {
   // Copied from histogram macro, but without the static variable caching
   // the histogram because name is dynamic.
   base::HistogramBase* counter = base::LinearHistogram::FactoryGet(
       name, 1, boundary_value, boundary_value + 1,
       base::HistogramBase::kUmaTargetedHistogramFlag);
   DCHECK_EQ(name, counter->histogram_name());
   counter->Add(sample);
 }
 
-void ANGLEPlatformImpl::histogramSparse(const char* name, int sample) {
+void ANGLEPlatformImpl_histogramSparse(const char* name, int sample) {
   // For sparse histograms, we can use the macro, as it does not incorporate a
   // static.
   UMA_HISTOGRAM_SPARSE_SLOWLY(name, sample);
 }
 
-void ANGLEPlatformImpl::histogramBoolean(const char* name, bool sample) {
-  histogramEnumeration(name, sample ? 1 : 0, 2);
+void ANGLEPlatformImpl_histogramBoolean(const char* name, bool sample) {
+  ANGLEPlatformImpl_histogramEnumeration(name, sample ? 1 : 0, 2);
+}
+
+}  // anonymous namespace
+
+bool InitializeANGLEPlatform(EGLDisplay display) {
+  angle::GetDisplayPlatformFunc angle_get_platform =
+      reinterpret_cast<angle::GetDisplayPlatformFunc>(
+          eglGetProcAddress("ANGLEGetDisplayPlatform"));
+  if (!angle_get_platform)
+    return false;
+
+  angle::PlatformMethods* platformMethods = nullptr;
+  if (!angle_get_platform(static_cast<angle::EGLDisplayType>(display),
+                          angle::g_PlatformMethodNames,
+                          angle::g_NumPlatformMethods, &platformMethods))

[Ken Russell (switch to Gerrit), 2017/02/13 23:39:13]

I assume this fails if the structure's changed size (or number of platform
methods) since the last time the code was compiled? Not seeing the definition of
angle_get_platform in code search. Would be helpful if you could link to it in
the CL description, since the bug is inaccessible.

[Ken Russell (switch to Gerrit), 2017/02/13 23:40:18]

Ah, I see now that you linked to it in the first message on this code review.
Please use the CL description in the future for important information like that.

+    return false;
+  platformMethods->currentTime = ANGLEPlatformImpl_currentTime;
+  platformMethods->addTraceEvent = ANGLEPlatformImpl_addTraceEvent;
+  platformMethods->currentTime = ANGLEPlatformImpl_currentTime;
+  platformMethods->getTraceCategoryEnabledFlag =
+      ANGLEPlatformImpl_getTraceCategoryEnabledFlag;
+  platformMethods->histogramBoolean = ANGLEPlatformImpl_histogramBoolean;
+  platformMethods->histogramCustomCounts =
+      ANGLEPlatformImpl_histogramCustomCounts;
+  platformMethods->histogramEnumeration =
+      ANGLEPlatformImpl_histogramEnumeration;
+  platformMethods->histogramSparse = ANGLEPlatformImpl_histogramSparse;
+  platformMethods->logError = ANGLEPlatformImpl_logError;
+  platformMethods->logWarning = ANGLEPlatformImpl_logWarning;
+  platformMethods->monotonicallyIncreasingTime =
+      ANGLEPlatformImpl_monotonicallyIncreasingTime;
+  platformMethods->updateTraceEventDuration =
+      ANGLEPlatformImpl_updateTraceEventDuration;
+  return true;
+}
+
+void ResetANGLEPlatform(EGLDisplay display) {
+  angle::ResetDisplayPlatformFunc angle_reset_platform =
+      reinterpret_cast<angle::ResetDisplayPlatformFunc>(
+          eglGetProcAddress("ANGLEResetDisplayPlatform"));
+  if (!angle_reset_platform)
+    return;
+  angle_reset_platform(static_cast<angle::EGLDisplayType>(display));
 }
 
 }  // namespace gl