Add Mac GPU logging code.

chrome/gpu/gpu_info_collector_mac.mm

Index: chrome/gpu/gpu_info_collector_mac.mm
===================================================================
--- chrome/gpu/gpu_info_collector_mac.mm	(revision 56911)
+++ chrome/gpu/gpu_info_collector_mac.mm	(working copy)
@@ -3,11 +3,131 @@
 // found in the LICENSE file.
 
 #include "chrome/gpu/gpu_info_collector.h"
+#include "base/sys_string_conversions.h"
 
+#import <Cocoa/Cocoa.h>
+#import <Foundation/Foundation.h>
+#import <IOKit/IOKitLib.h>
+#import <OpenGL/GL.h>
+
 namespace gpu_info_collector {
 
+static CFTypeRef SearchPortForProperty(io_registry_entry_t dspPort,
+                                       CFStringRef propertyName) {
+  return IORegistryEntrySearchCFProperty(dspPort,
+                                         kIOServicePlane,
+                                         propertyName,
+                                         kCFAllocatorDefault,
+                                         kIORegistryIterateRecursively |
+                                         kIORegistryIterateParents);
+}
+
+static void CFReleaseIf(CFTypeRef type_ref) {
+  if (type_ref)
+    CFRelease(type_ref);
+}
+
+static UInt32 IntValueOfCFData(CFDataRef data_ref) {
+  UInt32 value = 0;
+
+  if (data_ref) {
+    const UInt32 *value_pointer =
+        reinterpret_cast<const UInt32*>(CFDataGetBytePtr(data_ref));
+    if (value_pointer != NULL)
+      value = *value_pointer;
+  }
+
+  return value;
+}
+
+static void CollectVideoCardInfo(CGDirectDisplayID displayID,
+                                 int *vendorID,
+                                 int *deviceID) {
+  io_registry_entry_t dspPort = CGDisplayIOServicePort(displayID);
+
+  CFTypeRef vendorIDRef = SearchPortForProperty(dspPort, CFSTR("vendor-id"));
+  if (vendorID) *vendorID = IntValueOfCFData((CFDataRef)vendorIDRef);
+
+  CFTypeRef deviceIDRef = SearchPortForProperty(dspPort, CFSTR("device-id"));
+  if (deviceID) *deviceID = IntValueOfCFData((CFDataRef)deviceIDRef);
+
+  CFReleaseIf(vendorIDRef);
+  CFReleaseIf(deviceIDRef);
+}
+
+// Return a pointer to the last character with value c in string s.
+// Returns NULL if c is not found.
+static char* FindLastChar(char *s, char c) {
+  char *s_found = NULL;
+
+  while (*s != '\0') {
+    if (*s == c)
+      s_found = s;
+    s++;
+  }
+  return s_found;
+}
+
+
 bool CollectGraphicsInfo(GPUInfo& gpu_info) {
-  // TODO(rlp): complete this function
+  int vendor_id = 0;
+  int device_id = 0;
+  std::wstring driver_version = L"";
+  uint32 pixel_shader_version = 0u;
+  uint32 vertex_shader_version = 0u;
+  uint32 gl_version;
+
+  CollectVideoCardInfo(kCGDirectMainDisplay, &vendor_id, &device_id);
+
+  char *gl_version_string = (char*)glGetString(GL_VERSION);
+  char *gl_extensions_string = (char*)glGetString(GL_EXTENSIONS);
+
+  if ((gl_version_string == NULL) || (gl_extensions_string == NULL))
+    return false;
+
+  // Get the OpenGL version from the start of the string.
+  int gl_major = 0, gl_minor = 0;
+  sscanf(gl_version_string, "%u.%u",  &gl_major, &gl_minor);
+
+  // Get the OpenGL driver version.
+  // Mac OpenGL drivers have the driver version
+  // at the end of the gl version string preceded by a dash.
+  char *s = FindLastChar(gl_version_string, '-');
+  if (s) {
+    NSString *driver_version_ns = [[NSString alloc ] initWithUTF8String:s + 1];
+    driver_version = base::SysNSStringToWide(driver_version_ns);
+    [driver_version_ns release];
+  }
+
+  // Get the HLSL version.
+  // On OpenGL 1.x it's 1.0 if the GL_ARB_shading_language_100 extension is
+  // present.
+  // On OpenGL 2.x  it's a matter of getting the GL_SHADING_LANGUAGE_VERSION
+  // string.
+  int gl_hlsl_major = 0, gl_hlsl_minor = 0;
+  if ((gl_major == 1) &&
+      strstr(gl_extensions_string, "GL_ARB_shading_language_100")) {
+    gl_hlsl_major = 1;
+    gl_hlsl_minor = 0;
+  } else if (gl_major >= 2) {
+    char* glsl_version_string = (char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
+    if (glsl_version_string) {
+      sscanf(glsl_version_string, "%u.%u", &gl_hlsl_major, &gl_hlsl_minor);
+    }
+  }
+  pixel_shader_version = ((gl_hlsl_major << 16) & 0xffff0000)
+                         + (gl_hlsl_minor & 0x0000ffff);
+
+  // OpenGL doesn't have separate versions for pixel and vertex shader
+  // languages, so set them both to the GL_SHADING_LANGUAGE_VERSION value.
+  vertex_shader_version = pixel_shader_version;
+
+  gl_version = ((gl_major << 16) & 0xffff0000)
+               + (gl_minor & 0x0000ffff);
+
+  gpu_info.SetGraphicsInfo(vendor_id, device_id, driver_version,
+                           pixel_shader_version, vertex_shader_version,
+                           gl_version);
   return true;
 }