1 files changed, 66 insertions, 0 deletions
diff --git a/source/Irrlicht/OpenGL/ExtensionHandler.cpp b/source/Irrlicht/OpenGL/ExtensionHandler.cpp
new file mode 100644
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