source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/RenderState.h @ 3068

#ifndef __RENDERSTATE_H
#define __RENDERSTATE_H


#include "common.h"


namespace CHCDemoEngine 
{

class ShaderProgram;
class Texture;
class Material;

/** Class representing the current render state.
*/
class RenderState
{
public:

        enum Mode
        {
                QUERY,
                RENDER
        };

        /** Constructor setting render as default state.
        */
        RenderState();
        /** This must be called each time before and after an occlusion test.
                Mode is one of render mode or query mode. Returns true if a state
                change was issued.
        */
        bool SetMode(Mode mode);
        /** Sets the current render state.
        */
        void SetState(Technique *tech);
        /** Returns the current render state.
        */
        Technique *GetState() { return mCurrentTechnique; }
        /** Returns either query or render mode
        */
        inline Mode GetMode() const { return mMode; }
        /** Reset the state.
        */
        void Reset();
        /** Stores the current vbo id.
        */
        inline void SetCurrentVboId(int id) { mCurrentVboId = id; }
        /** Returns the current vbo id.
        */
        inline int GetCurrentVboId() const { return mCurrentVboId; }
        /** Sets the index of the render technique that is used to render a material. 
                Initially we use foreward = 0, deferred = 1, depth pass = 1
        */
        void SetRenderTechnique(int t);
        /** See Set
        */
        int GetRenderTechnique() const;
        /** If alpha to coverage is instead of alpha testing
        */
        void SetUseAlphaToCoverage(bool useAlphaToCoverage);
        /** If true, the current value of cull face enabled / disable will
                not be changed by the render state.
        */
        void LockCullFaceEnabled(bool lockCull);
        

protected:


        //////////////////

        bool mAlphaTestEnabled;
        bool mCullFaceEnabled;
        bool mTexturesEnabled;
        /// Render or query mode
        Mode mMode;

        int mCurrentVboId;
        /// the current render technique
        int mRenderTechnique;

        bool mUseAlphaToCoverage;

        bool mLockCullFaceEnabled;

        int mCurrentTexId;

        ShaderProgram *mCurrentVertexProgram;
        ShaderProgram *mCurrentFragmentProgram;

        bool mFragmentProgramEnabled;
        bool mVertexProgramEnabled;

        bool mLightingEnabled;
        bool mColorWriteEnabled;

        Technique *mCurrentTechnique;
        bool mDepthWriteEnabled;
};


}

#endif // __RENDERSTATE_H