OgreGLNullStateCacheManagerImp.h

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/*
 -----------------------------------------------------------------------------
 This source file is part of OGRE
 (Object-oriented Graphics Rendering Engine)
 For the latest info, see http://www.ogre3d.org/
 
 Copyright (c) 2000-2013 Torus Knot Software Ltd
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 -----------------------------------------------------------------------------
 */

#ifndef __GLNullStateCacheManagerImp_H__
#define __GLNullStateCacheManagerImp_H__

#include "OgreGLPrerequisites.h"

typedef Ogre::GeneralAllocatedObject StateCacheAlloc;

namespace Ogre
{
    class GLStateCacheManagerImp : public StateCacheAlloc
    {
    private:        
        vector<GLclampf>::type mClearColour;
        vector<GLboolean>::type mColourMask;
        GLboolean mDepthMask;
        GLenum mPolygonMode;
        GLenum mBlendEquation;
        GLenum mBlendFuncSource;
        GLenum mBlendFuncDest;
        GLenum mCullFace;
        GLenum mDepthFunc;
        GLuint mStencilMask;
        size_t mActiveTextureUnit;
        unsigned int mDiscardBuffers;
        GLclampf mClearDepth;
        int mViewport[4];

        GLenum mBlendEquationRGB;
        GLenum mBlendEquationAlpha;
        GLenum mShadeModel;

        GLfloat mAmbient[4];
        GLfloat mDiffuse[4];
        GLfloat mSpecular[4];
        GLfloat mEmissive[4];
        GLfloat mLightAmbient[4];
        GLfloat mShininess;

        GLfloat mPointSize;
        GLfloat mPointSizeMin;
        GLfloat mPointSizeMax;
        GLfloat mPointAttenuation[3];

    public:
        GLStateCacheManagerImp(void);
        ~GLStateCacheManagerImp(void);
        
        void initializeCache();
        
        void clearCache();
        
        void bindGLBuffer(GLenum target, GLuint buffer, bool force = false);
        
        void deleteGLBuffer(GLenum target, GLuint buffer, bool force = false);
        
        void bindGLTexture(GLenum target, GLuint texture);
        
        void setTexParameteri(GLenum target, GLenum pname, GLint param);

        void invalidateStateForTexture(GLuint texture);

        bool activateGLTextureUnit(size_t unit);
        
        GLenum getBlendEquation(void) const { return mBlendEquation; }
        
        void setBlendEquation(GLenum eq);

        void setBlendEquation(GLenum eqRGB, GLenum eqA);

        void setBlendFunc(GLenum source, GLenum dest);

        void setShadeModel(GLenum model);

        void setLightAmbient(GLfloat r, GLfloat g, GLfloat b);

        GLboolean getDepthMask(void) const { return mDepthMask; }
        
        void setDepthMask(GLboolean mask);
        
        GLenum getDepthFunc(void) const { return mDepthFunc; }
        
        void setDepthFunc(GLenum func);
        
        GLclampf getClearDepth(void) const { return mClearDepth; }
        
        void setClearDepth(GLclampf depth);
        
        void setClearColour(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
        
        vector<GLboolean>::type & getColourMask(void) { return mColourMask; }
        
        void setColourMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
        
        GLuint getStencilMask(void) const { return mStencilMask; }
        
        void setStencilMask(GLuint mask);
        
        void setEnabled(GLenum flag);
        
        void setDisabled(GLenum flag);
        
        unsigned int getDiscardBuffers(void) const { return mDiscardBuffers; }
        
        void setDiscardBuffers(unsigned int flags) { mDiscardBuffers = flags; }
        
        GLenum getPolygonMode(void) const { return mPolygonMode; }
        
        void setPolygonMode(GLenum mode);
        
        GLenum getCullFace(void) const { return mCullFace; }
        
        void setCullFace(GLenum face);

        void enableTextureCoordGen(GLenum type);
        void disableTextureCoordGen(GLenum type);

        // Set material lighting parameters
        void setMaterialAmbient(GLfloat r, GLfloat g, GLfloat b, GLfloat a);
        void setMaterialDiffuse(GLfloat r, GLfloat g, GLfloat b, GLfloat a);
        void setMaterialEmissive(GLfloat r, GLfloat g, GLfloat b, GLfloat a);
        void setMaterialSpecular(GLfloat r, GLfloat g, GLfloat b, GLfloat a);
        void setMaterialShininess(GLfloat shininess);
        void setPointSize(GLfloat size);
        void setPointParameters(GLfloat* attenuation, float minSize, float maxSize);

        void setViewport(GLint x, GLint y, GLsizei width, GLsizei height);

        void getViewport(int* array);
    };
}

#endif