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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 "shader_source.h"
#include "color.h"
#include "texture.h"
#include "gl.h"
namespace AsuraEngine
{
namespace Graphics
{
///
/// һshaderһڲʼ乲ijShaderuniformsͶݣֻṩ
/// uniformsuseɫķ༭ÿshaderͨshaderҵuniforms
/// ¶frameworkmaterialá
///
class Shader ASURA_FINAL
: public Scripting::Portable<Shader>
, public AEIO::Renewable
{
public:
LUAX_DECL_FACTORY(Shader);
Shader() asura_throw(Exception);
~Shader();
///
/// ӴshaderʱȼǷϴλuniforms location mapʹ
/// glAttachShader±ɫɫ
///
bool Update(AEIO::DecodedData* decodeData) override;
///
/// shaderΪ
///
void Use();
///
/// shaderΪǻ
///
void Unuse();
///
/// Ѿ֪uniform location£ֵ
///
void SetUniformFloat(uint loc, float value);
void SetUniformTexture(uint loc, const Texture& texture);
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);
uint GetUniformLocation(const std::string& uniform);
bool HasUniform(const std::string& uniform);
GLuint GetGLProgramHandle();
///
/// texture unitһΪ16
///
static uint GetGLTextureUnitCount();
private:
///
/// ǰshader
///
static Shader* mCurrentShader;
///
/// ñ
/// vec2 Asura_Time xֵΪ뵱ǰʼʱ䣬yֵΪһ֡ʱ
/// vec2 Asura_RenderTargetSize RTĴСΪλ
/// Texture Asura_MainTexture
///
void SetBuiltInUniforms();
///
/// OpenGL shader program handle.
///
GLuint mProgram;
GLuint mVertShader;
GLuint mFragShader;
Luax::LuaxMemberRef mCodeRef;
private:
//----------------------------------------------------------------------------//
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);
};
}
}
#endif
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