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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 "gpu/config/gpu_info_collector.h"
#include "base/android/build_info.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_surface.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];
}
class ScopedRestoreNonOwnedEGLContext {
public:
ScopedRestoreNonOwnedEGLContext();
~ScopedRestoreNonOwnedEGLContext();
private:
EGLContext context_;
EGLDisplay display_;
EGLSurface draw_surface_;
EGLSurface read_surface_;
};
ScopedRestoreNonOwnedEGLContext::ScopedRestoreNonOwnedEGLContext()
: context_(EGL_NO_CONTEXT),
display_(EGL_NO_DISPLAY),
draw_surface_(EGL_NO_SURFACE),
read_surface_(EGL_NO_SURFACE) {
// This should only used to restore a context that is not created or owned by
// Chromium native code, but created by Android system itself.
DCHECK(!gfx::GLContext::GetCurrent());
if (gfx::GLSurface::InitializeOneOff()) {
context_ = eglGetCurrentContext();
display_ = eglGetCurrentDisplay();
draw_surface_ = eglGetCurrentSurface(EGL_DRAW);
read_surface_ = eglGetCurrentSurface(EGL_READ);
}
}
ScopedRestoreNonOwnedEGLContext::~ScopedRestoreNonOwnedEGLContext() {
if (context_ == EGL_NO_CONTEXT || display_ == EGL_NO_DISPLAY ||
draw_surface_ == EGL_NO_SURFACE || read_surface_ == EGL_NO_SURFACE) {
return;
}
if (!eglMakeCurrent(display_, draw_surface_, read_surface_, context_)) {
LOG(WARNING) << "Failed to restore EGL context";
}
}
}
namespace gpu {
bool CollectContextGraphicsInfo(GPUInfo* gpu_info) {
return CollectBasicGraphicsInfo(gpu_info);
}
GpuIDResult CollectGpuID(uint32* vendor_id, uint32* device_id) {
DCHECK(vendor_id && device_id);
*vendor_id = 0;
*device_id = 0;
return kGpuIDNotSupported;
}
bool CollectBasicGraphicsInfo(GPUInfo* gpu_info) {
gpu_info->can_lose_context = false;
gpu_info->finalized = true;
gpu_info->machine_model = base::android::BuildInfo::GetInstance()->model();
// Create a short-lived context on the UI thread to collect the GL strings.
// Make sure we restore the existing context if there is one.
ScopedRestoreNonOwnedEGLContext restore_context;
return CollectGraphicsInfoGL(gpu_info);
}
bool CollectDriverInfoGL(GPUInfo* gpu_info) {
gpu_info->driver_version = GetDriverVersionFromString(
gpu_info->gl_version_string);
gpu_info->gpu.vendor_string = gpu_info->gl_vendor;
gpu_info->gpu.device_string = gpu_info->gl_renderer;
return true;
}
void MergeGPUInfo(GPUInfo* basic_gpu_info,
const GPUInfo& context_gpu_info) {
MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
}
bool DetermineActiveGPU(GPUInfo* gpu_info) {
DCHECK(gpu_info);
if (gpu_info->secondary_gpus.size() == 0)
return true;
// TODO(zmo): implement this when Android starts to support more
// than one GPUs.
return false;
}
} // namespace gpu
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