context.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef GRAPHICS_OPENGL_CONTEXT_H
#define GRAPHICS_OPENGL_CONTEXT_H

#include "common/singleton.h"

namespace OpenGL {

enum ContextType {
    kContextNone,
    kContextGL,
    kContextGLES,
    kContextGLES2
};

class Context : public Common::Singleton<Context> {
public:
    Context();

    void initialize(ContextType contextType);

    void reset();

    ContextType type;

    inline bool isGLVersionOrHigher(int major, int minor) const {
        return ((majorVersion > major) || ((majorVersion == major) && (minorVersion >= minor)));
    }

    int majorVersion, minorVersion;

    int glslVersion;

    int maxTextureSize;

    bool NPOTSupported;

    bool imagingSupported;

    bool shadersSupported;

    bool enginesShadersSupported;

    bool multitextureSupported;

    bool framebufferObjectSupported;

    bool framebufferObjectMultisampleSupported;

    int multisampleMaxSamples;

    bool bgraSupported;

    bool packedPixelsSupported;

    bool packedDepthStencilSupported;

    bool unpackSubImageSupported;

    bool OESDepth24;

    bool textureEdgeClampSupported;

    bool textureBorderClampSupported;

    bool textureMirrorRepeatSupported;

    bool textureMaxLevelSupported;

    unsigned int textureLookupPrecision;

private:
    int getGLSLVersion() const;
};

} // End of namespace OpenGL

#define OpenGLContext OpenGL::Context::instance()

#endif