ui/gl/gl_version_info.h

   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 #ifndef UI_GL_GL_VERSION_INFO_H_
   6 #define UI_GL_GL_VERSION_INFO_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include "base/basictypes.h"
  11 #include "ui/gl/gl_export.h"
  12
  13 namespace gfx {
  14
  15 struct GL_EXPORT GLVersionInfo {
  16   GLVersionInfo(const char* version_str, const char* renderer_str,
  17                 const char* extensions_str);
  18
  19   GLVersionInfo(const char* version_str, const char* renderer_str,
  20                 const std::set<std::string>& exts);
  21
  22   bool IsAtLeastGL(unsigned major, unsigned minor) const {
  23     return !is_es && (major_version > major ||
  24                       (major_version == major && minor_version >= minor));
  25   }
  26
  27   bool IsLowerThanGL(unsigned major, unsigned minor) const {
  28     return !is_es && (major_version < major ||
  29                       (major_version == major && minor_version < minor));
  30   }
  31
  32   bool IsAtLeastGLES(unsigned major, unsigned minor) const {
  33     return is_es && (major_version > major ||
  34                      (major_version == major && minor_version >= minor));
  35   }
  36
  37   bool BehavesLikeGLES() const {
  38     return is_es || is_desktop_core_profile;
  39   }
  40
  41   bool IsES3Capable() const {
  42     if (IsAtLeastGLES(3, 0) || IsAtLeastGL(4, 2))
  43       return true;
  44 #if defined(OS_MACOSX)
  45     // TODO(zmo): For experimentation purpose on MacOSX with core profile,
  46     // allow 3.2 or plus for now.
  47     if (IsAtLeastGL(3, 2))
  48       return true;
  49 #endif
  50     return false;
  51   }
  52
  53   static void ParseVersionString(const char* version_str,
  54                                  unsigned* major_version,
  55                                  unsigned* minor_version,
  56                                  bool* is_es,
  57                                  bool* is_es3);
  58
  59   bool is_es;
  60   bool is_angle;
  61   unsigned major_version;
  62   unsigned minor_version;
  63   bool is_es3;
  64   bool is_desktop_core_profile;
  65
  66  private:
  67   GLVersionInfo(const char* version_str, const char* renderer_str);
  68
  69   DISALLOW_COPY_AND_ASSIGN(GLVersionInfo);
  70 };
  71
  72 }  // namespace gfx
  73
  74 #endif // UI_GL_GL_VERSION_INFO_H_