Merge branch 'opengl3' of https://github.com/numberZero/irrlicht

[irrlicht.git] / source / Irrlicht / OpenGL / ExtensionHandler.cpp

diff --git a/source/Irrlicht/OpenGL/ExtensionHandler.cpp b/source/Irrlicht/OpenGL/ExtensionHandler.cpp
new file mode 100644 (file)
index 0000000..b9cb75a
--- /dev/null
+++ b/source/Irrlicht/OpenGL/ExtensionHandler.cpp
@@ -0,0 +1,66 @@
+// Copyright (C) 2015 Patryk Nadrowski
+// Copyright (C) 2009-2010 Amundis
+// 2017 modified by Michael Zeilfelder (unifying extension handlers)
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in Irrlicht.h
+
+#include "ExtensionHandler.h"
+
+#include "irrString.h"
+#include "SMaterial.h"
+#include "fast_atof.h"
+#include <mt_opengl.h>
+
+namespace irr
+{
+namespace video
+{
+       void COpenGL3ExtensionHandler::initExtensions()
+       {
+               GLint major, minor;
+               glGetIntegerv(GL_MAJOR_VERSION, &major);
+               glGetIntegerv(GL_MINOR_VERSION, &minor);
+               Version = 100 * major + 10 * minor;
+
+               GLint ext_count = 0;
+               GL.GetIntegerv(GL_NUM_EXTENSIONS, &ext_count);
+               for (int k = 0; k < ext_count; k++) {
+                       auto ext_name = (char *)GL.GetStringi(GL_EXTENSIONS, k);
+                       for (size_t j=0; j<IRR_OGLES_Feature_Count; ++j) {
+                               if (!strcmp(getFeatureString(j), ext_name)) {
+                                       FeatureAvailable[j] = true;
+                                       break;
+                               }
+                       }
+               }
+
+               GLint val=0;
+               glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &val);
+               Feature.MaxTextureUnits = static_cast<u8>(val);
+
+       #ifdef GL_EXT_texture_filter_anisotropic
+               if (FeatureAvailable[IRR_GL_EXT_texture_filter_anisotropic])
+               {
+                       glGetIntegerv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &val);
+                       MaxAnisotropy = static_cast<u8>(val);
+               }
+       #endif
+       #ifdef GL_MAX_ELEMENTS_INDICES
+               glGetIntegerv(GL_MAX_ELEMENTS_INDICES, &val);
+               MaxIndices=val;
+       #endif
+               glGetIntegerv(GL_MAX_TEXTURE_SIZE, &val);
+               MaxTextureSize=static_cast<u32>(val);
+       #ifdef GL_EXT_texture_lod_bias
+               if (FeatureAvailable[IRR_GL_EXT_texture_lod_bias])
+                       glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS_EXT, &MaxTextureLODBias);
+       #endif
+               glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, DimAliasedLine);
+               glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, DimAliasedPoint);
+
+               Feature.MaxTextureUnits = core::min_(Feature.MaxTextureUnits, static_cast<u8>(MATERIAL_MAX_TEXTURES));
+               Feature.ColorAttachment = 1;
+       }
+
+} // end namespace video
+} // end namespace irr