source/Irrlicht/OpenGL/ExtensionHandler.cpp

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