T2Shader_GL.h

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#pragma once
 
#ifdef TRENDERINTERFACE_GL
 
#  include "Toshi/TPString8.h"
#  include "Toshi/T2Map.h"
#  include "Math/TMatrix44.h"
#  include "Math/TVector4.h"
#  include "Math/TVector3.h"
 
#  include <GL/glew.h>
#  include <glm/ext.hpp>
 
#  include <immintrin.h>
#  include <intrin.h>
 
TOSHI_NAMESPACE_START
 
//-----------------------------------------------------------------------------
// Note: This is a custom class which is not the same as the one used in TOSHI 2.0
// since it was never actually used in any games but in some tools like TXSViewer which
// is not publicly available, so it's not possible to match this class.
//-----------------------------------------------------------------------------
 
class T2CompiledShader
{
public:
    constexpr T2CompiledShader()
        : m_uiId( 0 )
    {}
 
    constexpr T2CompiledShader( GLuint a_uiId )
        : m_uiId( a_uiId )
    {}
 
    constexpr T2CompiledShader( const T2CompiledShader& a_rOther )
        : m_uiId( a_rOther.m_uiId )
    {}
 
    constexpr GLuint GetId() const { return m_uiId; }
 
    constexpr operator TBOOL() const { return m_uiId != 0; }
 
private:
    GLuint m_uiId;
};
 
//-----------------------------------------------------------------------------
// Purpose: Holds references to vertex and fragment shaders forming OpenGL
// shader program.
//-----------------------------------------------------------------------------
class T2Shader
{
public:
    struct UniformMeta
    {
        GLint id;
 
        union
        {
            TINT      integer;
            TUINT     uInteger;
            TMatrix44 mat44;
            __m128    vec4;
            TVector3  vec3;
            FLOAT     fp;
        };
 
        UniformMeta()
        {}
 
        UniformMeta( GLint a_iId )
            : id( a_iId )
        {}
 
        UniformMeta( const UniformMeta& a_rcOther )
            : id( a_rcOther.id )
            , mat44( a_rcOther.mat44 )
        {}
    };
 
public:
    T2Shader()
        : m_uiProgram( 0 ), m_VShader( 0 ), m_FShader( 0 )
    {}
 
    T2Shader( const T2CompiledShader& a_VShader, const T2CompiledShader& a_FShader )
        : m_uiProgram( 0 ), m_VShader( a_VShader ), m_FShader( a_FShader )
    {}
 
    T2Shader( const T2Shader& a_rOther )
        : m_uiProgram( a_rOther.m_uiProgram ), m_VShader( a_rOther.m_VShader ), m_FShader( a_rOther.m_FShader )
    {}
 
    TBOOL Create();
    void  Destroy( TBOOL a_bDeleteShaders );
 
    UniformMeta& GetUniformSlotId( const TCHAR* a_szSlotName );
    UniformMeta& GetUniformSlotId( const TPString8& a_strSlotName );
 
    TBOOL SetUniform( const TPString8& a_strSlotName, const TMatrix44& a_rMatrix );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TMatrix44* a_pMatrix, TUINT a_uiNumItems );
    TBOOL SetUniform( const TPString8& a_strSlotName, const glm::mat4& a_rMatrix );
    TBOOL SetUniform( const TPString8& a_strSlotName, const glm::mat4* a_pMatrix, TUINT a_uiNumItems );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TVector4& a_rVector );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TVector4* a_pVector, TUINT a_uiNumItems );
    TBOOL SetUniform( const TPString8& a_strSlotName, const glm::vec4& a_rVector );
    TBOOL SetUniform( const TPString8& a_strSlotName, const glm::vec4* a_pVector, TUINT a_uiNumItems );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TVector3& a_rVector );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TVector3* a_pVector, TUINT a_uiNumItems );
    TBOOL SetUniform( const TPString8& a_strSlotName, TFLOAT a_fValue );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TFLOAT* a_pValue, TUINT a_uiNumItems );
    TBOOL SetUniform( const TPString8& a_strSlotName, TINT a_iValue );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TINT* a_pValue, TUINT a_uiNumItems );
    TBOOL SetUniform( const TPString8& a_strSlotName, TUINT a_uiValue );
    TBOOL SetUniform( const TPString8& a_strSlotName, const TUINT* a_pValue, TUINT a_uiNumItems );
 
    GLuint           GetProgram() const { return m_uiProgram; }
    T2CompiledShader GetVertexShader() const { return m_VShader; }
    T2CompiledShader GetFragmentShader() const { return m_FShader; }
 
    T2Shader& operator=( const T2Shader& a_rOther );
 
private:
    friend class T2Render;
    friend class T2RenderContext;
    void Use() const;
 
private:
    GLuint           m_uiProgram;
    T2CompiledShader m_VShader;
    T2CompiledShader m_FShader;
 
    T2Map<TPString8, UniformMeta, TPString8::Comparator> m_UniformToSlotId;
};
 
TOSHI_NAMESPACE_END
 
#endif // TRENDERINTERFACE_GL