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#ifndef __ASURA_ENGINE_OPENGL_H__
#define __ASURA_ENGINE_OPENGL_H__
#include <stack>
#include <glad/glad.h>
#include <asura-utils/scripting/portable.hpp>
#include <asura-utils/math/rect.hpp>
#include <asura-utils/math/matrix44.h>
#include "matrix_stack.h"
namespace AsuraEngine
{
namespace Graphics
{
class Profiler;
class Shader;
class GPUBuffer;
enum MatrixMode
{
MATRIX_MODE_PROJECTION = 0,
MATRIX_MODE_MODEL = 1,
MATRIX_MODE_VIEW = 2,
};
enum GLPrams
{
GL_PARAM_MAX_TEXTURE_UNIT = 1,
};
///
/// OpenGLģһЩopengl״̬١ڱ༭രڻ£һڶӦһhwnd
/// һhdcԼopengl contextʹwglMakeCurrent(hdc, glc)ָǰ̶߳
/// Ⱦhdcopenglglcglм¼ľһ̵߳һڵһOpenGL
/// ĵ״ֶ̬֧Ⱦ
///
class OpenGL : public AEScripting::Portable<OpenGL>
{
public:
OpenGL();
~OpenGL();
///
/// óֵ
///
int GetParam(GLPrams param);
///
/// ʼOpenGLIJڴOpenGL֮˺עOpenGLĵַ
///
bool Init(const AEMath::Recti& viewport);
bool Inited();
void SetViewport(const AEMath::Recti viewport);
const AEMath::Recti& GetViewport();
void UseShader(Shader* shader);
void UnuseShader();
Shader* GetShader();
///
/// ͳdrawcall
///
void DrawArrays(GLenum mode, GLint first, GLsizei count);
///
/// Matrix stackز
///
void SetMatrixMode(MatrixMode mode);
MatrixMode GetMatrixMode();
void PushMatrix();
void PopMatrix();
void LoadIdentity();
void Rotate(float angle);
void Translate(float x, float y);
void Scale(float x, float y);
void Ortho(float l, float r, float b, float t, float n, float f);
AEMath::Matrix44& GetMatrix(MatrixMode mode);
uint GetMatrixDepth();
uint GetMatrixIndex();
///
/// ʾ
///
void WipeError();
bool HasError();
GLenum GetError();
///
/// OpenGL3.0Ժû任ӿڡshaderȲﱣһЩOpenGL״̬ע
/// ƺȫ̵ģҲ˵Asuraֶ֧߳ȾOpenGLĵĴʹһ
/// İһHDC\ϣڴض̴߳ģOpenGLҲһ
/// ض̡߳ͬһ̵߳IJͬHDC\ڿԹͬһOpenGLġΪ
/// дtextuer\shaderhandle
///
struct
{
Shader* shader; ///< ǰʹõshader
AEMath::Recti viewport; ///< ǰлHDC߱ڴСı߲ˢʱ䶯
MatrixStack matrix[3]; ///< model, view, projection
MatrixMode matrixMode; ///< ǰľ
uint drawcall; ///< ͳdrawcall
} state;
private:
friend class Profiler;
LUAX_DECL_SINGLETON(OpenGL);
//----------------------------------------------------------------------------//
LUAX_DECL_ENUM(MatrixMode, 1);
LUAX_DECL_ENUM(GLPrams, 1);
LUAX_DECL_METHOD(_SetMatrixMode);
LUAX_DECL_METHOD(_GetMatrixMode);
LUAX_DECL_METHOD(_PushMatrix);
LUAX_DECL_METHOD(_PopMatrix);
LUAX_DECL_METHOD(_LoadIdentity);
LUAX_DECL_METHOD(_Rotate);
LUAX_DECL_METHOD(_Translate);
LUAX_DECL_METHOD(_Scale);
LUAX_DECL_METHOD(_Ortho);
LUAX_DECL_METHOD(_GetMatrixDepth);
LUAX_DECL_METHOD(_GetMatrixIndex);
LUAX_DECL_METHOD(_UseShader);
LUAX_DECL_METHOD(_UnuseShader);
//----------------------------------------------------------------------------//
};
///
/// OpenGL
///
extern OpenGL gl;
}
}
#endif
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