/** 
 * @file llrender.h
 * @brief LLRender definition
 *
 *	This class acts as a wrapper for OpenGL calls.
 *	The goal of this class is to minimize the number of api calls due to legacy rendering
 *	code, to define an interface for a multiple rendering API abstraction of the UI
 *	rendering, and to abstract out direct rendering calls in a way that is cleaner and easier to maintain.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLGLRENDER_H
#define LL_LLGLRENDER_H

//#include "linden_common.h"

#include "v2math.h"
#include "v3math.h"
#include "v4coloru.h"
#include "v4math.h"
#include "llstrider.h"
#include "llpointer.h"
#include "llglheaders.h"
#include "llmatrix4a.h"
#include "llrect.h"
#include "llvector4a.h"
#include <boost/align/aligned_allocator.hpp>

class LLVertexBuffer;
class LLCubeMap;
class LLImageGL;
class LLRenderTarget;
class LLTexture ;
class LLMatrix4a;

#define LL_MATRIX_STACK_DEPTH 32

class LLTexUnit
{
	friend class LLRender;
public:
	static U32 sWhiteTexture;

	typedef enum
	{
		TT_TEXTURE = 0,			// Standard 2D Texture
		TT_CUBE_MAP,		// 6-sided cube map texture
		TT_NONE 		// No texture type is currently enabled
	} eTextureType;

	typedef enum
	{
		TAM_WRAP = 0,			// Standard 2D Texture
		TAM_MIRROR,				// Non power of 2 texture
		TAM_CLAMP 				// No texture type is currently enabled
	} eTextureAddressMode;

	typedef enum
	{	// Note: If mipmapping or anisotropic are not enabled or supported it should fall back gracefully
		TFO_POINT = 0,			// Equal to: min=point, mag=point, mip=none.
		TFO_BILINEAR,			// Equal to: min=linear, mag=linear, mip=point.
		TFO_TRILINEAR,			// Equal to: min=linear, mag=linear, mip=linear.
		TFO_ANISOTROPIC			// Equal to: min=anisotropic, max=anisotropic, mip=linear.
	} eTextureFilterOptions;

	typedef enum 
	{
		TB_REPLACE = 0,
		TB_ADD,
		TB_MULT,
		TB_MULT_X2,
		TB_ALPHA_BLEND,
		TB_COMBINE			// Doesn't need to be set directly, setTexture___Blend() set TB_COMBINE automatically
	} eTextureBlendType;

	typedef enum 
	{
		TBO_REPLACE = 0,			// Use Source 1
		TBO_MULT,					// Multiply: ( Source1 * Source2 )
		TBO_MULT_X2,				// Multiply then scale by 2:  ( 2.0 * ( Source1 * Source2 ) )
		TBO_MULT_X4,				// Multiply then scale by 4:  ( 4.0 * ( Source1 * Source2 ) )
		TBO_ADD,					// Add: ( Source1 + Source2 )
		TBO_ADD_SIGNED,				// Add then subtract 0.5: ( ( Source1 + Source2 ) - 0.5 )
		TBO_SUBTRACT,				// Subtract Source2 from Source1: ( Source1 - Source2 )
		TBO_LERP_VERT_ALPHA,		// Interpolate based on Vertex Alpha (VA): ( Source1 * VA + Source2 * (1-VA) )
		TBO_LERP_TEX_ALPHA,			// Interpolate based on Texture Alpha (TA): ( Source1 * TA + Source2 * (1-TA) )
		TBO_LERP_PREV_ALPHA,		// Interpolate based on Previous Alpha (PA): ( Source1 * PA + Source2 * (1-PA) )
		TBO_LERP_CONST_ALPHA,		// Interpolate based on Const Alpha (CA): ( Source1 * CA + Source2 * (1-CA) )
		TBO_LERP_VERT_COLOR			// Interpolate based on Vertex Col (VC): ( Source1 * VC + Source2 * (1-VC) )
										// *Note* TBO_LERP_VERTEX_COLOR only works with setTextureColorBlend(),
										// and falls back to TBO_LERP_VERTEX_ALPHA for setTextureAlphaBlend().
	} eTextureBlendOp;

	typedef enum 
	{
		TBS_PREV_COLOR = 0,			// Color from the previous texture stage
		TBS_PREV_ALPHA,
		TBS_ONE_MINUS_PREV_COLOR,
		TBS_ONE_MINUS_PREV_ALPHA,
		TBS_TEX_COLOR,				// Color from the texture bound to this stage
		TBS_TEX_ALPHA,
		TBS_ONE_MINUS_TEX_COLOR,
		TBS_ONE_MINUS_TEX_ALPHA,
		TBS_VERT_COLOR,				// The vertex color currently set
		TBS_VERT_ALPHA,
		TBS_ONE_MINUS_VERT_COLOR,
		TBS_ONE_MINUS_VERT_ALPHA,
		TBS_CONST_COLOR,			// The constant color value currently set
		TBS_CONST_ALPHA,
		TBS_ONE_MINUS_CONST_COLOR,
		TBS_ONE_MINUS_CONST_ALPHA
	} eTextureBlendSrc;

	LLTexUnit(S32 index);

	// Refreshes renderer state of the texture unit to the cached values
	// Needed when the render context has changed and invalidated the current state
	void refreshState(void);

	// returns the index of this texture unit
	S32 getIndex(void) const { return mIndex; }

	// Sets this tex unit to be the currently active one
	void activate(void); 

	// Enables this texture unit for the given texture type 
	// (automatically disables any previously enabled texture type)
	void enable(eTextureType type); 

	// Disables the current texture unit
	void disable(void);	
	
	// Binds the LLImageGL to this texture unit 
	// (automatically enables the unit for the LLImageGL's texture type)
	bool bind(LLImageGL* texture, bool for_rendering = false, bool forceBind = false);
	bool bind(LLTexture* texture, bool for_rendering = false, bool forceBind = false);

	// Binds a cubemap to this texture unit 
	// (automatically enables the texture unit for cubemaps)
	bool bind(LLCubeMap* cubeMap);

	// Binds a render target to this texture unit 
	// (automatically enables the texture unit for the RT's texture type)
	bool bind(LLRenderTarget * renderTarget, bool bindDepth = false);

	// Manually binds a texture to the texture unit 
	// (automatically enables the tex unit for the given texture type)
	bool bindManual(eTextureType type, U32 texture, bool hasMips = false);
	
	// Unbinds the currently bound texture of the given type 
	// (only if there's a texture of the given type currently bound)
	void unbind(eTextureType type);

	// Sets the addressing mode used to sample the texture
	// Warning: this stays set for the bound texture forever, 
	// make sure you want to permanently change the address mode  for the bound texture.
	void setTextureAddressMode(eTextureAddressMode mode);

	// Sets the filtering options used to sample the texture
	// Warning: this stays set for the bound texture forever, 
	// make sure you want to permanently change the filtering for the bound texture.
	void setTextureFilteringOption(LLTexUnit::eTextureFilterOptions option);

	void setTextureBlendType(eTextureBlendType type);

	inline void setTextureColorBlend(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2 = TBS_PREV_COLOR)
	{ setTextureCombiner(op, src1, src2, false); }

	// NOTE: If *_COLOR enums are passed to src1 or src2, the corresponding *_ALPHA enum will be used instead.
	inline void setTextureAlphaBlend(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2 = TBS_PREV_ALPHA)
	{ setTextureCombiner(op, src1, src2, true); }

	static U32 getInternalType(eTextureType type);

	U32 getCurrTexture(void) { return mCurrTexture; }

	eTextureType getCurrType(void) { return mCurrTexType; }

	void setHasMipMaps(bool hasMips) { mHasMipMaps = hasMips; }

protected:
	const S32			mIndex;
	U32					mCurrTexture;
	eTextureType		mCurrTexType;
	eTextureBlendType	mCurrBlendType;
	eTextureBlendOp		mCurrColorOp;
	eTextureBlendSrc	mCurrColorSrc1;
	eTextureBlendSrc	mCurrColorSrc2;
	eTextureBlendOp		mCurrAlphaOp;
	eTextureBlendSrc	mCurrAlphaSrc1;
	eTextureBlendSrc	mCurrAlphaSrc2;
	S32					mCurrColorScale;
	S32					mCurrAlphaScale;
	bool				mHasMipMaps;
	
	void debugTextureUnit(void);
	void setColorScale(S32 scale);
	void setAlphaScale(S32 scale);
	GLint getTextureSource(eTextureBlendSrc src);
	GLint getTextureSourceType(eTextureBlendSrc src, bool isAlpha = false);
	void setTextureCombiner(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2, bool isAlpha = false);
};

struct LLLightStateData
{
	LLLightStateData(bool notSun=true) :
		mConstantAtten(1.f),
		mLinearAtten(0.f),
		mQuadraticAtten(0.f),
		mSpotExponent(0.f),
		mSpotCutoff(180.f)
	{
		if (!notSun)
		{
			mDiffuse.set(1, 1, 1, 1);
			mSpecular.set(1, 1, 1, 1);
		}
		mPosition.set(0, 0, 1, 0);
		mSpotDirection.set(0, 0, -1);
	}

	LLColor4 mDiffuse;
	LLColor4 mSpecular;
	LLVector4 mPosition;
	LLVector3 mSpotDirection;

	F32 mConstantAtten;
	F32 mLinearAtten;
	F32 mQuadraticAtten;

	F32 mSpotExponent;
	F32 mSpotCutoff;
};

class LLLightState
{
public:
	LLLightState(S32 index);

	void enable() { setEnabled(true); }
	void disable() { setEnabled(false); }
	void setState(LLLightStateData& state) {
		setDiffuse(state.mDiffuse);
		setSpecular(state.mSpecular);
		setPosition(state.mPosition);
		setConstantAttenuation(state.mConstantAtten);
		setLinearAttenuation(state.mLinearAtten);
		setQuadraticAttenuation(state.mQuadraticAtten);
		setSpotExponent(state.mSpotExponent);
		setSpotCutoff(state.mSpotCutoff);
		setSpotDirection(state.mSpotDirection);
	}
	const LLColor4& getDiffuse() const { return mState.mDiffuse; }
	void setDiffuse(const LLColor4& diffuse);
	void setSpecular(const LLColor4& specular);
	void setPosition(const LLVector4& position);
	void setConstantAttenuation(const F32& atten);
	void setLinearAttenuation(const F32& atten);
	void setQuadraticAttenuation(const F32& atten);
	void setSpotExponent(const F32& exponent);
	void setSpotCutoff(const F32& cutoff);
	void setSpotDirection(const LLVector3& direction);
	void setEnabled(const bool enabled);

protected:
	friend class LLRender;

	S32 mIndex;
	LLLightStateData mState;
	bool mEnabled;
	LLMatrix4a mPosMatrix;
	LLMatrix4a mSpotMatrix;
};

LL_ALIGN_PREFIX(16)
class LLRender
{
	friend class LLTexUnit;
	friend void check_blend_funcs();
public:

	enum eTexIndex
	{
		DIFFUSE_MAP = 0,
		NORMAL_MAP,
		SPECULAR_MAP,
		NUM_TEXTURE_CHANNELS,
	};

	enum eVolumeTexIndex
	{
		LIGHT_TEX = 0,
		SCULPT_TEX,
		NUM_VOLUME_TEXTURE_CHANNELS,
	};
	
	typedef enum {
		TRIANGLES = 0,
		TRIANGLE_STRIP,
		TRIANGLE_FAN,
		POINTS,
		LINES,
		LINE_STRIP,
		LINE_LOOP,
		NUM_MODES
	} eGeomModes;

	typedef enum 
	{
		CF_NEVER = 0,
		CF_ALWAYS,
		CF_LESS,
		CF_LESS_EQUAL,
		CF_EQUAL,
		CF_NOT_EQUAL,
		CF_GREATER_EQUAL,
		CF_GREATER,
		CF_DEFAULT
	}  eCompareFunc;

	typedef enum 
	{
		BT_ALPHA = 0,
		BT_ADD,
		BT_ADD_WITH_ALPHA,	// Additive blend modulated by the fragment's alpha.
		BT_MULT,
		BT_MULT_ALPHA,
		BT_MULT_X2,
		BT_REPLACE
	} eBlendType;

	typedef enum 
	{
		BF_ONE = 0,
		BF_ZERO,
		BF_DEST_COLOR,
		BF_SOURCE_COLOR,
		BF_ONE_MINUS_DEST_COLOR,
		BF_ONE_MINUS_SOURCE_COLOR,
		BF_DEST_ALPHA,
		BF_SOURCE_ALPHA,
		BF_ONE_MINUS_DEST_ALPHA,
		BF_ONE_MINUS_SOURCE_ALPHA,

		BF_UNDEF
	} eBlendFactor;

	typedef enum
	{
		MM_MODELVIEW = 0,
		MM_PROJECTION,
		MM_TEXTURE0,
		MM_TEXTURE1,
		MM_TEXTURE2,
		MM_TEXTURE3,
		NUM_MATRIX_MODES,
		MM_TEXTURE
	} eMatrixMode;

	typedef enum
	{
		PF_FRONT,
		PF_BACK,
		PF_FRONT_AND_BACK
	} ePolygonFaceType;

	typedef enum
	{
		PM_POINT,
		PM_LINE,
		PM_FILL
	} ePolygonMode;

	static const U8 NUM_LIGHTS = 8;

	// Cache of global gl state. (excludes nested texunit/light states)
	struct Context {
		Context() :
			texUnit(0),
			color{ 1.f,1.f,1.f,1.f },
			colorMask{ 0xf },
			alphaFunc(CF_ALWAYS),
			alphaVal(0.f),
			blendColorSFactor(BF_ONE),
			blendAlphaDFactor(BF_ZERO),
			blendAlphaSFactor(BF_ONE),
			blendColorDFactor(BF_ZERO),
			lineWidth(1.f),
			pointSize(1.f),
			polygonMode{ PM_FILL, PM_FILL },
			polygonOffset{ 0.f, 0.f },
			viewPort(),
			scissor()
		{
		}
		U32				texUnit;
		LLColor4		color;
		U8				colorMask : 4;
		eCompareFunc	alphaFunc;
		F32				alphaVal;
		eBlendFactor	blendColorSFactor;
		eBlendFactor	blendColorDFactor;
		eBlendFactor	blendAlphaSFactor;
		eBlendFactor	blendAlphaDFactor;
		F32				lineWidth;
		F32				pointSize;
		ePolygonMode	polygonMode[2];
		F32				polygonOffset[2];
		LLRect			viewPort;
		LLRect			scissor;
		void			printDiff(const Context& other) const
		{
			if (memcmp(this, &other, sizeof(other)) == 0)
			{
				return;
			}
#define PRINT_DIFF(prop) \
			LL_INFOS() << #prop << ": " << other.prop; \
			if (prop != other.prop) { LL_CONT << " -> " << prop; } \
			LL_CONT << LL_ENDL;
#define PRINT_DIFF_BIT(prop, bit) \
			LL_INFOS() << #prop << "(1<<" << #bit << "): " << (other.prop&(1<<bit)); \
			if ((prop&(1<<bit)) != (other.prop&(1<<bit))) { LL_CONT << " -> " << (prop&(1<<bit)); } \
			LL_CONT << LL_ENDL;
			PRINT_DIFF(texUnit);
			PRINT_DIFF(color.mV[0]);
			PRINT_DIFF(color.mV[1]);
			PRINT_DIFF(color.mV[2]);
			PRINT_DIFF(color.mV[3]);
			PRINT_DIFF_BIT(colorMask, 0);
			PRINT_DIFF_BIT(colorMask, 1);
			PRINT_DIFF_BIT(colorMask, 2);
			PRINT_DIFF_BIT(colorMask, 3);
			PRINT_DIFF(alphaFunc);
			PRINT_DIFF(blendColorSFactor);
			PRINT_DIFF(blendColorDFactor);
			PRINT_DIFF(blendAlphaSFactor);
			PRINT_DIFF(blendAlphaDFactor);
			PRINT_DIFF(lineWidth);
			PRINT_DIFF(pointSize);
			PRINT_DIFF(polygonMode[0]);
			PRINT_DIFF(polygonMode[1]);
			PRINT_DIFF(polygonOffset[0]);
			PRINT_DIFF(polygonOffset[1]);
			PRINT_DIFF(viewPort);
			PRINT_DIFF(scissor);
		}
	};

	LLRender();
	~LLRender();
	void init() ;
	void shutdown();
	void destroyGL();
	
	// Refreshes renderer state to the cached values
	// Needed when the render context has changed and invalidated the current state
	void refreshState(void);

	void resetVertexBuffers();
	void restoreVertexBuffers();

	LLMatrix4a genRot(const GLfloat& a, const LLVector4a& axis) const;
	LLMatrix4a genRot(const GLfloat& a, const GLfloat& x, const GLfloat& y, const GLfloat& z) const { return genRot(a,LLVector4a(x,y,z)); }
	LLMatrix4a genOrtho(const GLfloat& left, const GLfloat& right, const GLfloat& bottom, const GLfloat&  top, const GLfloat& znear, const GLfloat& zfar) const;
	LLMatrix4a genPersp(const GLfloat& fovy, const GLfloat& aspect, const GLfloat& znear, const GLfloat& zfar) const;
	LLMatrix4a genLook(const LLVector3& pos_in, const LLVector3& dir_in, const LLVector3& up_in) const;
	const LLMatrix4a& genNDCtoWC() const;

	void translatef(const GLfloat& x, const GLfloat& y, const GLfloat& z);
	void scalef(const GLfloat& x, const GLfloat& y, const GLfloat& z);
	//rotatef requires generation of a transform matrix involving sine/cosine. If rotating by a constant value, use genRot, store the result in a static variable, and pass that var to rotatef.
	void rotatef(const LLMatrix4a& rot);
	void rotatef(const GLfloat& a, const GLfloat& x, const GLfloat& y, const GLfloat& z);
	void ortho(F32 left, F32 right, F32 bottom, F32 top, F32 zNear, F32 zFar);
	bool projectf(const LLVector3& object, const LLMatrix4a& modelview, const LLMatrix4a& projection, const LLRect& viewport, LLVector3& windowCoordinate);
	bool unprojectf(const LLVector3& windowCoordinate, const LLMatrix4a& modelview, const LLMatrix4a& projection, const LLRect& viewport, LLVector3& object);

	void pushMatrix();
	void popMatrix();
	void loadMatrix(const LLMatrix4a& mat);
	void loadIdentity();
	void multMatrix(const LLMatrix4a& mat);
	void matrixMode(U32 mode);	
	U32 getMatrixMode();

	const LLMatrix4a& getModelviewMatrix();
	const LLMatrix4a& getProjectionMatrix();

	void syncContextState();
	void syncMatrices();
	void syncLightState();
	void syncShaders();

	void translateUI(F32 x, F32 y, F32 z);
	void scaleUI(F32 x, F32 y, F32 z);
	// Rotates vertices, pre-translation/scale
	void rotateUI(LLQuaternion& rot);
	void pushUIMatrix();
	void popUIMatrix();
	void loadUIIdentity();
	LLVector3 getUITranslation();
	LLVector3 getUIScale();

	void flush();

	void begin(const GLuint& mode);
	void end();

	LL_FORCE_INLINE void vertex2i(const GLint& x, const GLint& y) { vertex4a(LLVector4a((GLfloat)x,(GLfloat)y,0.f)); }
	LL_FORCE_INLINE void vertex2f(const GLfloat& x, const GLfloat& y) { vertex4a(LLVector4a(x,y,0.f)); }
	LL_FORCE_INLINE void vertex3f(const GLfloat& x, const GLfloat& y, const GLfloat& z) { vertex4a(LLVector4a(x,y,z)); }
	LL_FORCE_INLINE void vertex2fv(const GLfloat* v) { vertex4a(LLVector4a(v[0],v[1],0.f)); }
	LL_FORCE_INLINE void vertex3fv(const GLfloat* v) { vertex4a(LLVector4a(v[0],v[1],v[2])); }
	void vertex4a(const LLVector4a& v);

	void texCoord2i(const GLint& x, const GLint& y);
	void texCoord2f(const GLfloat& x, const GLfloat& y);
	void texCoord2fv(const GLfloat* tc);

	void color4ub(const GLubyte& r, const GLubyte& g, const GLubyte& b, const GLubyte& a);
	void color4f(const GLfloat& r, const GLfloat& g, const GLfloat& b, const GLfloat& a);
	void color4fv(const GLfloat* c);
	void color3f(const GLfloat& r, const GLfloat& g, const GLfloat& b);
	void color3fv(const GLfloat* c);
	void color4ubv(const GLubyte* c);

	void diffuseColor3f(F32 r, F32 g, F32 b);
	void diffuseColor3fv(const F32* c);
	void diffuseColor4f(F32 r, F32 g, F32 b, F32 a);
	void diffuseColor4fv(const F32* c);
	void diffuseColor4ubv(const U8* c);
	void diffuseColor4ub(U8 r, U8 g, U8 b, U8 a);

	void vertexBatchPreTransformed(LLVector4a* verts, S32 vert_count);
	void vertexBatchPreTransformed(LLVector4a* verts, LLVector2* uvs, S32 vert_count);
	void vertexBatchPreTransformed(LLVector4a* verts, LLVector2* uvs, LLColor4U*, S32 vert_count);

	void setColorMask(bool writeColor, bool writeAlpha);
	void setColorMask(bool writeColorR, bool writeColorG, bool writeColorB, bool writeAlpha);
	void setSceneBlendType(eBlendType type);

	void setAlphaRejectSettings(eCompareFunc func, F32 value = 0.01f);

	void setPolygonMode(ePolygonFaceType type, ePolygonMode mode);
	void setPolygonOffset(F32 factor, F32 bias);

	void setViewport(S32 x, S32 y, U32 w, U32 h) { setViewport(LLRect(x, y + h, x + w, y)); };
	void setViewport(const LLRect& rect);

	void setScissor(S32 x, S32 y, U32 w, U32 h) { setScissor(LLRect(x, y + h, x + w, y)); };
	void setScissor(const LLRect& rect);
	const LLRect& getScissor() const { return mNewContext.scissor; }

	void setShader(U32 shader) { mNextShader = shader; }

	// applies blend func to both color and alpha
	void blendFunc(eBlendFactor sfactor, eBlendFactor dfactor);
	// applies separate blend functions to color and alpha
	void blendFunc(eBlendFactor color_sfactor, eBlendFactor color_dfactor,
		       eBlendFactor alpha_sfactor, eBlendFactor alpha_dfactor);

	LLLightState* getLight(U32 index);
	void setAmbientLightColor(const LLColor4& color);

	void setLineWidth(F32 line_width);
	F32 getLineWidth() const { return mNewContext.lineWidth; }
	void setPointSize(F32 point_size);

	LLTexUnit* getTexUnit(U32 index);

	U32	getCurrentTexUnitIndex(void) const { return mNewContext.texUnit; }

	bool verifyTexUnitActive(U32 unitToVerify);

	void debugTexUnits(void);

	void clearErrors();

	const Context& getContextSnapshot() const { return mNewContext; }

	struct Vertex
	{
		GLfloat v[3];
		GLubyte c[4];
		GLfloat uv[2];
	};

	void resetSyncHashes();

public:
	static U32 sUICalls;
	static U32 sUIVerts;
	static bool sGLCoreProfile;
	
private:
	friend class LLLightState;

	U32 mMatrixMode;
	U32 mMatIdx[NUM_MATRIX_MODES];
	U32 mMatHash[NUM_MATRIX_MODES];
	LL_ALIGN_16(LLMatrix4a mMatrix[NUM_MATRIX_MODES][LL_MATRIX_STACK_DEPTH]);
	U32 mCurLegacyMatHash[NUM_MATRIX_MODES];
	U32 mLightHash;
	U32 mCurLegacyLightHash;
	U32 mLightPositionTransformHash[NUM_LIGHTS];
	U32 mLightSpotTransformHash[NUM_LIGHTS];
	U32 mCurLightPositionTransformHash[NUM_LIGHTS];
	U32 mCurLightSpotTransformHash[NUM_LIGHTS];
	LLVector4 mCurLightPosition[NUM_LIGHTS];
	LLVector3 mCurSpotDirection[NUM_LIGHTS];
	LLColor4 mAmbientLightColor;
	U32 mCurShader;
	U32 mNextShader;
	
	bool			mDirty;

	Context mContext;
	Context mNewContext;

	U32				mCount;
	U32				mMode;

	LLPointer<LLVertexBuffer>	mBuffer;
	LLStrider<LLVector4a>		mVerticesp;
	LLStrider<LLVector2>		mTexcoordsp;
	LLStrider<LLColor4U>		mColorsp;
	std::vector<LLTexUnit*>		mTexUnits;
	LLTexUnit*			mDummyTexUnit;
	std::vector<LLLightState*> mLightState;

	F32				mMaxAnisotropy;

	std::vector<LLVector4a, boost::alignment::aligned_allocator<LLVector4a, 64> > mUIOffset;
	std::vector<LLVector4a, boost::alignment::aligned_allocator<LLVector4a, 64> > mUIScale;
	std::vector<LLQuaternion> mUIRotation;

	bool			mPrimitiveReset;
} LL_ALIGN_POSTFIX(16);


extern LLMatrix4a gGLModelView;
extern LLMatrix4a gGLLastModelView;
extern LLMatrix4a gGLLastProjection;
extern LLMatrix4a gGLPreviousModelView;
extern LLMatrix4a gGLProjection;
extern LLRect gGLViewport;

extern LLRender gGL;

#endif