#ifndef SHADER_H
#define SHADER_H

#include "common.h"

enum ShaderVarType
{
	RAVEN_SHADER_SAMPLER,
	RAVEN_SHADER_FLOAT1,
	RAVEN_SHADER_FLOAT2,
	RAVEN_SHADER_FLOAT3,
	RAVEN_SHADER_FLOAT4,
	RAVEN_SHADER_INT1,
	RAVEN_SHADER_INT2,
	RAVEN_SHADER_INT3,
	RAVEN_SHADER_INT4,
	RAVEN_SHADER_MATRIX_2X2,
	RAVEN_SHADER_MATRIX_3X3,
	RAVEN_SHADER_MATRIX_4X4,
};

struct ShaderVariable
{
	ShaderVarType type;
	void *val;
	char name[1024];

	ShaderVariable(): val(NULL), type(RAVEN_SHADER_INT1) {}
	ShaderVariable(const ShaderVariable &var)
	{
		strcpy(this->name,var.name);
		this->val=var.val;
		this->type=var.type;
	}
	ShaderVariable(const char *name,void *val,ShaderVarType type=RAVEN_SHADER_INT1): val(val), type(type)
	{
		strcpy(this->name,name);
	}
};

class ShaderProgram
{
protected:
	bool hasfrag;
	bool is_valid;
	unsigned int numuniforms;
	ShaderVariable uniforms[64];

	char *vpsrc,*fpsrc;

	virtual char *LoadShaderFile(const char *filename);
public:
	ShaderProgram(const char *dir,const char *name,bool fragprogram);
	virtual ~ShaderProgram();

	virtual bool IsValid() {return is_valid;}

	virtual bool AddUniform(const ShaderVariable &var);
	virtual void ClearUniforms();
	virtual void Bind()=0;
};

#endif