PrimeWorldEditor/src/Core/OpenGL/GLCommon.cpp

#include "GLCommon.h"
#include <Common/Macros.h>

const std::array<GLenum, 8> gBlendFactor
{
    GL_ZERO,                // GX_BL_ZERO
    GL_ONE,                 // GX_BL_ONE
    GL_SRC_COLOR,           // GX_BL_SRCCLR / GX_BL_DSTCLR
    GL_ONE_MINUS_SRC_COLOR, // GX_BL_INVSRCCLR / GX_BL_INVDSTCLR
    GL_SRC_ALPHA,           // GX_BL_SRCALPHA
    GL_ONE_MINUS_SRC_ALPHA, // GX_BL_INVSRCALPHA
    GL_DST_ALPHA,           // GX_BL_DSTALPHA
    GL_ONE_MINUS_DST_ALPHA  // GX_BL_INVDSTALPHA
};


const std::array<GLenum, 7> gZMode
{
    GL_NEVER,    // GX_NEVER
    GL_LESS,     // GX_LESS
    GL_EQUAL,    // GX_EQUAL
    GL_LEQUAL,   // GX_LEQUAL
    GL_GREATER,  // GX_GREATER
    GL_NOTEQUAL, // GX_NEQUAL
    GL_ALWAYS    // GX_ALWAYS
};

GLenum GXPrimToGLPrim(EPrimitiveType Type)
{
    switch (Type) {
        case EPrimitiveType::Quads:         return GL_TRIANGLE_STRIP; // Quads are converted to strips
        case EPrimitiveType::Triangles:     return GL_TRIANGLE_STRIP; // Triangles are converted to strips
        case EPrimitiveType::TriangleStrip: return GL_TRIANGLE_STRIP;
        case EPrimitiveType::TriangleFan:   return GL_TRIANGLE_STRIP; // Fans are converted to strips
        case EPrimitiveType::Lines:         return GL_LINES;
        case EPrimitiveType::LineStrip:     return GL_LINE_STRIP;
        case EPrimitiveType::Points:        return GL_POINTS;
        default:                            ASSERT(false); return GL_INVALID_ENUM;
    }
}