ui/gl/gl_version_info.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gl/gl_version_info.h"
   6
   7 #include "base/strings/string_number_conversions.h"
   8 #include "base/strings/string_tokenizer.h"
   9 #include "base/strings/string_util.h"
  10
  11 namespace gfx {
  12
  13 GLVersionInfo::GLVersionInfo(const char* version_str, const char* renderer_str)
  14     : is_es(false),
  15       is_angle(false),
  16       major_version(0),
  17       minor_version(0),
  18       is_es3(false) {
  19   if (version_str) {
  20     std::string lstr(base::StringToLowerASCII(std::string(version_str)));
  21     is_es = (lstr.length() > 12) && (lstr.substr(0, 9) == "opengl es");
  22     if (is_es)
  23       lstr = lstr.substr(10, 3);
  24     base::StringTokenizer tokenizer(lstr.begin(), lstr.end(), ".");
  25     unsigned major, minor;
  26     if (tokenizer.GetNext() &&
  27         base::StringToUint(tokenizer.token_piece(), &major)) {
  28       major_version = major;
  29       if (tokenizer.GetNext() &&
  30           base::StringToUint(tokenizer.token_piece(), &minor)) {
  31         minor_version = minor;
  32       }
  33     }
  34     if (is_es && major_version == 3)
  35       is_es3 = true;
  36   }
  37   if (renderer_str) {
  38     is_angle = StartsWithASCII(renderer_str, "ANGLE", true);
  39   }
  40 }
  41
  42 }  // namespace gfx