source/Irrlicht/OpenGL/ExtensionHandler.cpp

   1 // Copyright (C) 2015 Patryk Nadrowski\r
   2 // Copyright (C) 2009-2010 Amundis\r
   3 // 2017 modified by Michael Zeilfelder (unifying extension handlers)\r
   4 // This file is part of the "Irrlicht Engine".\r
   5 // For conditions of distribution and use, see copyright notice in Irrlicht.h\r
   6 \r
   7 #include "ExtensionHandler.h"\r
   8 \r
   9 #include "irrString.h"\r
  10 #include "SMaterial.h"\r
  11 #include "fast_atof.h"\r
  12 #include <mt_opengl.h>\r
  13 \r
  14 namespace irr\r
  15 {\r
  16 namespace video\r
  17 {\r
  18         void COpenGL3ExtensionHandler::initExtensions()\r
  19         {\r
  20                 GLint major, minor;\r
  21                 glGetIntegerv(GL_MAJOR_VERSION, &major);\r
  22                 glGetIntegerv(GL_MINOR_VERSION, &minor);\r
  23                 Version = 100 * major + 10 * minor;\r
  24 \r
  25                 GLint ext_count = 0;\r
  26                 GL.GetIntegerv(GL_NUM_EXTENSIONS, &ext_count);\r
  27                 for (int k = 0; k < ext_count; k++) {\r
  28                         auto ext_name = (char *)GL.GetStringi(GL_EXTENSIONS, k);\r
  29                         for (size_t j=0; j<IRR_OGLES_Feature_Count; ++j) {\r
  30                                 if (!strcmp(getFeatureString(j), ext_name)) {\r
  31                                         FeatureAvailable[j] = true;\r
  32                                         break;\r
  33                                 }\r
  34                         }\r
  35                 }\r
  36 \r
  37                 GLint val=0;\r
  38                 glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &val);\r
  39                 Feature.MaxTextureUnits = static_cast<u8>(val);\r
  40 \r
  41         #ifdef GL_EXT_texture_filter_anisotropic\r
  42                 if (FeatureAvailable[IRR_GL_EXT_texture_filter_anisotropic])\r
  43                 {\r
  44                         glGetIntegerv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &val);\r
  45                         MaxAnisotropy = static_cast<u8>(val);\r
  46                 }\r
  47         #endif\r
  48         #ifdef GL_MAX_ELEMENTS_INDICES\r
  49                 glGetIntegerv(GL_MAX_ELEMENTS_INDICES, &val);\r
  50                 MaxIndices=val;\r
  51         #endif\r
  52                 glGetIntegerv(GL_MAX_TEXTURE_SIZE, &val);\r
  53                 MaxTextureSize=static_cast<u32>(val);\r
  54         #ifdef GL_EXT_texture_lod_bias\r
  55                 if (FeatureAvailable[IRR_GL_EXT_texture_lod_bias])\r
  56                         glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS_EXT, &MaxTextureLODBias);\r
  57         #endif\r
  58                 glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, DimAliasedLine);\r
  59                 glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, DimAliasedPoint);\r
  60 \r
  61                 Feature.MaxTextureUnits = core::min_(Feature.MaxTextureUnits, static_cast<u8>(MATERIAL_MAX_TEXTURES));\r
  62                 Feature.ColorAttachment = 1;\r
  63         }\r
  64 \r
  65 } // end namespace video\r
  66 } // end namespace irr\r