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// Copyright (c) 2012 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 "content/gpu/gpu_info_collector.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "base/string_piece.h"
#include "base/string_split.h"
#include "base/string_util.h"
#include "content/public/common/content_switches.h"
namespace {
std::string GetDriverVersionFromString(const std::string& version_string) {
// Extract driver version from the second number in a string like:
// "OpenGL ES 2.0 V@6.0 AU@ (CL@2946718)"
// Exclude first "2.0".
size_t begin = version_string.find_first_of("0123456789");
if (begin == std::string::npos)
return "0";
size_t end = version_string.find_first_not_of("01234567890.", begin);
// Extract number of the form "%d.%d"
begin = version_string.find_first_of("0123456789", end);
if (begin == std::string::npos)
return "0";
end = version_string.find_first_not_of("01234567890.", begin);
std::string sub_string;
if (end != std::string::npos)
sub_string = version_string.substr(begin, end - begin);
else
sub_string = version_string.substr(begin);
std::vector<std::string> pieces;
base::SplitString(sub_string, '.', &pieces);
if (pieces.size() < 2)
return "0";
return pieces[0] + "." + pieces[1];
}
}
namespace gpu_info_collector {
bool CollectContextGraphicsInfo(content::GPUInfo* gpu_info) {
// can_lose_context must be false to enable accelerated Canvas2D
gpu_info->can_lose_context = false;
gpu_info->finalized = true;
return CollectGraphicsInfoGL(gpu_info);
}
bool CollectBasicGraphicsInfo(content::GPUInfo* gpu_info) {
gpu_info->can_lose_context = false;
// Create a short-lived context on the UI thread to collect the GL strings.
if (!CollectGraphicsInfoGL(gpu_info))
return false;
std::string vendor(StringToLowerASCII(gpu_info->gl_vendor));
std::string renderer(StringToLowerASCII(gpu_info->gl_renderer));
bool is_img = vendor.find("imagination") != std::string::npos;
bool is_arm = vendor.find("arm") != std::string::npos;
bool is_mali_t604 = is_arm && renderer.find("mali-t604") != std::string::npos;
// IMG: avoid context switching perf problems, crashes with share groups
// Mali-T604: http://crbug.com/154715
if (is_img || is_mali_t604) {
CommandLine::ForCurrentProcess()->AppendSwitch(
switches::kEnableVirtualGLContexts);
}
return true;
}
bool CollectDriverInfoGL(content::GPUInfo* gpu_info) {
gpu_info->driver_version = GetDriverVersionFromString(
gpu_info->gl_version_string);
return true;
}
void MergeGPUInfo(content::GPUInfo* basic_gpu_info,
const content::GPUInfo& context_gpu_info) {
MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
}
} // namespace gpu_info_collector
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