////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2011, 2026
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License along
//    with this program; if not, write to the Free Software Foundation, Inc.,
//    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
////////////////////////////////////////////////////////////////////////////////

#ifndef __INCLUDE_GLStateExtension_hpp_INCLUDE__
#define __INCLUDE_GLStateExtension_hpp_INCLUDE__

#include <GLEXT/GLState.hpp>

class GLStateExtension
{
public:
	static void setup();  // Setup and check for each extension

	// clang-format off
	// uncrustify off

	// Use VBO
	static bool hasVBO()                { return hasVBO_; }
	static int  getMaxElementVertices() { return maxElementVertices_; }
	static int  getMaxElementIndices()  { return maxElementIndices_; }
	// Use MultiTex
	static bool hasMultiTex()           { return hasMultiTex_; }
	// Use framebuffers
	static bool hasFBO()                { return hasFBO_; }
	// User drawrangeelements
	static bool hasDrawRangeElements()  { return hasDrawRangeElements_; }
	// Use tex sub image extension?
	static bool getNoTexSubImage()      { return noTexSubImage_; }
	// Use cube map extension?
	static bool hasCubeMap()            { return hasCubeMap_; }
	// Use sphere map extension?
	static bool hasSphereMap()          { return hasSphereMap_; }
	// Use hardware mipmap extension?
	static bool hasHardwareMipmaps()    { return hasHardwareMipmaps_; }
	// Use env combine
	static bool hasEnvCombine()         { return envCombine_; }
	// How many texture units
	static int  getTextureUnits()       { return textureUnits_; }
	// How many image units
	static int  getImageUnits()         { return imageUnits_; }
	// How many texture coords
	static int  getTextureCoords()      { return textureCoords_; }
	// How many varying floats in shaders
	static int  getMaxVarying()         { return maxVarying_; }
	// Use FrameBuffer extension
	static bool hasHardwareShadows()    { return hasHardwareShadows_; }
	// Use glBlendColorEXT
	static bool hasBlendColor()         { return hasBlendColor_; }
	// Use shaders
	static bool hasShaders()            { return hasShaders_; }
	// Is this a software implementation
	static bool isSoftwareOpenGL()      { return isSoftwareOpenGL_; }
	// Should we use simple shaders
	static bool useSimpleShaders()      { return useSimpleShaders_; }

	// uncrustify on
	// clang-format on

protected:
	static bool envCombine_;
	static bool multiTexDisabled_;
	static bool hasVBO_;
	static bool hasFBO_;
	static bool hasShaders_;
	static int  textureUnits_, imageUnits_, textureCoords_;
	static int  maxVarying_;
	static int  maxElementVertices_;
	static int  maxElementIndices_;
	static bool hasCubeMap_;
	static bool hasSphereMap_;
	static bool hasHardwareMipmaps_;
	static bool noTexSubImage_;
	static bool hasHardwareShadows_;
	static bool hasBlendColor_;
	static bool hasMultiTex_;
	static bool hasDrawRangeElements_;
	static bool isSoftwareOpenGL_;
	static bool useSimpleShaders_;

private:
	GLStateExtension();
	~GLStateExtension();
};

#endif  // __INCLUDE_GLStateExtension_hpp_INCLUDE__
