Types.h

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// Copyright © 2008-2023 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef GRAPHICS_TYPES_H
#define GRAPHICS_TYPES_H
 
#include "SDL_stdinc.h"
 
namespace Graphics {
 
    //Vertex attribute semantic
    enum VertexAttrib : uint8_t {
        ATTRIB_NONE = 0,
        ATTRIB_POSITION = (1u << 0),
        ATTRIB_NORMAL = (1u << 1),
        ATTRIB_DIFFUSE = (1u << 2),
        ATTRIB_UV0 = (1u << 3),
        //ATTRIB_UV1       = (1u << 4),
        ATTRIB_TANGENT = (1u << 5),
        //ATTRIB_BITANGENT = (1u << 6)
        ATTRIB_POSITION2D = (1u << 7),
        //etc.
    };
 
    // typedef Uint32 AttributeSet;
 
    struct AttributeSet {
        AttributeSet() :
            m_attr(0) {}
        AttributeSet(VertexAttrib attr) :
            m_attr(attr) {}
        AttributeSet(uint32_t attr) :
            m_attr(attr) {}
        AttributeSet &operator=(uint32_t rhs)
        {
            m_attr = rhs;
            return *this;
        }
        operator uint32_t() const { return m_attr; }
 
        inline bool HasAttrib(uint32_t attr) const { return (m_attr & attr) == attr; }
 
    private:
        uint32_t m_attr;
    };
 
    enum VertexAttribFormat : uint8_t {
        ATTRIB_FORMAT_NONE = 0,
        ATTRIB_FORMAT_FLOAT2,
        ATTRIB_FORMAT_FLOAT3,
        ATTRIB_FORMAT_FLOAT4,
        ATTRIB_FORMAT_UBYTE4
    };
 
    enum ConstantDataFormat : uint8_t {
        DATA_FORMAT_NONE = 0,
        DATA_FORMAT_INT,
        DATA_FORMAT_FLOAT,
        DATA_FORMAT_FLOAT3,
        DATA_FORMAT_FLOAT4,
        DATA_FORMAT_MAT3,
        DATA_FORMAT_MAT4
    };
 
    enum BufferUsage {
        BUFFER_USAGE_STATIC,
        BUFFER_USAGE_DYNAMIC
    };
 
    enum BufferMapMode {
        BUFFER_MAP_NONE,
        BUFFER_MAP_WRITE,
        BUFFER_MAP_READ
    };
 
    enum IndexBufferSize {
        INDEX_BUFFER_16BIT,
        INDEX_BUFFER_32BIT
    };
 
    // clang-format off
    enum PrimitiveType {
        POINTS = 0,     //GL_POINTS,
        LINE_SINGLE,    //GL_LINES,             //draw one line per two vertices
        LINE_LOOP,      //GL_LINE_LOOP,         //connect vertices,  connect start & end
        LINE_STRIP,     //GL_LINE_STRIP,        //connect vertices
        TRIANGLES,      //GL_TRIANGLES,
        TRIANGLE_STRIP, //GL_TRIANGLE_STRIP,
        TRIANGLE_FAN,   //GL_TRIANGLE_FAN
    };
    // clang-format on
 
    enum BlendMode : uint32_t {
        BLEND_SOLID,
        BLEND_ADDITIVE,
        BLEND_ALPHA,
        BLEND_ALPHA_ONE, //"additive alpha"
        BLEND_ALPHA_PREMULT,
        BLEND_SET_ALPHA, // copy alpha channel
        BLEND_DEST_ALPHA // XXX maybe crappy name
    };
 
    enum FaceCullMode : uint32_t {
        CULL_BACK,
        CULL_FRONT,
        CULL_NONE
    };
 
} // namespace Graphics
 
#endif // GRAPHICS_TYPES_H