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#ifndef __ASURA_ENGINE_SHADER_H__
#define __ASURA_ENGINE_SHADER_H__
#include <map>
#include <string>
#include <asura-utils/exceptions/exception.h>
#include <asura-utils/scripting/portable.hpp>
#include <asura-utils/io/renewable.h>
#include <asura-utils/math/vector2.hpp>
#include <asura-utils/math/vector3.hpp>
#include <asura-utils/math/vector4.h>
#include <asura-utils/math/matrix44.h>
#include <asura-utils/stringmap.hpp>
#include <asura-utils/manager.hpp>
#include "gl.h"
#include "color.h"
#include "texture.h"
#include "gpu_buffer.h"
namespace AsuraEngine
{
namespace Graphics
{
///
/// һshaderһڲʼ乲ijShaderuniformsͶݣֻṩ
/// uniformsuseɫķ༭ÿshaderͨshaderҵuniforms
/// ¶frameworkmaterialá
///
class Shader ASURA_FINAL
: public Scripting::Portable<Shader>
, public AEIO::Renewable
{
public:
Shader();
~Shader();
bool Load(const std::string& vert, const std::string& frag) ASURA_THROW(Exception);
void OnUse();
void OnUnuse();
///
/// öԣAsuraֻ֧2ά
///
//int GetAttributeLocation(const std::string& name);
//void SetAttribute(int loc, void* data, uint offset = 0, uint stride = 0);
//void SetAttribute(int loc, GPUBuffer* vbo, uint offset = 0, uint stride = 0);
///
/// ǰö
///
void SetAttribPosition(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
void SetAttribTangent(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
void SetAttribNormal(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
void SetAttribTexcoord0(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
void SetAttribTexcoord1(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
void SetAttribTexcoord2(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
void SetAttribTexcoord3(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
void SetAttribColor(int size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);
///
/// uniform
///
bool HasUniform(const std::string& uniform);
uint GetUniformLocation(const std::string& uniform);
void SetUniformFloat(uint loc, float value);
void SetUniformVector2(uint loc, const Math::Vector2f& vec2);
void SetUniformVector3(uint loc, const Math::Vector3f& vec3);
void SetUniformVector4(uint loc, const Math::Vector4f& vec4);
void SetUniformColor(uint loc, const Color& color);
void SetUniformMatrix44(uint loc, const Math::Matrix44& mat44);
bool SetUniformTexture(uint loc, const Texture& texture);
///
/// \uniform
///
void SetBuiltInUniforms();
float GetUniformFloat(uint loc);
AEMath::Vector2f GetUniformVector2(uint loc);
AEMath::Vector3f GetUniformVector3(uint loc);
AEMath::Vector4f GetUniformVector4s(uint loc);
AEMath::Matrix44 GetUniformMatrix44(uint loc);
GLuint GetGLProgram();
static uint GetGLTextureUnitCount();
private:
//----------------------------------------------------------------------------//
LUAX_DECL_FACTORY(Shader);
LUAX_DECL_METHOD(_New);
LUAX_DECL_METHOD(_Use);
LUAX_DECL_METHOD(_Unuse);
LUAX_DECL_METHOD(_Load);
LUAX_DECL_METHOD(_Update);
LUAX_DECL_METHOD(_HasUniform);
LUAX_DECL_METHOD(_GetUniformLocation);
LUAX_DECL_METHOD(_SetBuiltInUniforms);
LUAX_DECL_METHOD(_SetUniformFloat);
LUAX_DECL_METHOD(_SetUniformTexture);
LUAX_DECL_METHOD(_SetUniformVector2);
LUAX_DECL_METHOD(_SetUniformVector3);
LUAX_DECL_METHOD(_SetUniformVector4);
LUAX_DECL_METHOD(_SetUniformColor);
//----------------------------------------------------------------------------//
std::string GetProgramWarnings();
std::string GetShaderWarnings(GLuint shader);
///
/// AsuraShader壬Ժuniformframeworkлshaderװ
/// ν壬ָshaderԶıⲿʱҪṩЩֵ
/// ĻҪ
///
enum ASLSemantics
{
// MVP
SEMANTICS_UNIFORM_MODEL_MATRIX = 0,
SEMANTICS_UNIFORM_VIEW_MATRIX,
SEMANTICS_UNIFORM_PROJECTION_MATRIX,
//
SEMANTICS_ATTRIBUTE_POSITION,
//
SEMANTICS_ATTRIBUTE_TANGENT,
//
SEMANTICS_ATTRIBUTE_NORMAL,
// UV
SEMANTICS_ATTRIBUTE_TEXCOORD0,
SEMANTICS_ATTRIBUTE_TEXCOORD1,
SEMANTICS_ATTRIBUTE_TEXCOORD2,
SEMANTICS_ATTRIBUTE_TEXCOORD3,
// ɫ
SEMANTICS_ATTRIBUTE_COLOR,
SEMANTICS_COUNT
};
///
/// Asura shader ַͳһ
///
static const char* SemanticsName[SEMANTICS_COUNT];
GLuint mProgram;
GLuint mVertShader;
GLuint mFragShader;
///
/// Model\View\Projection matrix uniformlocationAsuraҪshader
/// 壺
/// 1: asura_model_matrix ģ;
/// 2: asura_view_matrix ۲߾
/// 3: asura_projection_matrix ͶӰ
/// frameworkø壬ֵϷͱ༭еġ
///
GLint mMVP[3];
///
/// Եlocation
///
GLint mPosition;
GLint mTangent;
GLint mNormal;
GLint mColor;
// ֧UV
GLint mTexcoord0;
GLint mTexcoord1;
GLint mTexcoord2;
GLint mTexcoord3;
};
}
}
#endif
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