public GXVertexLayout(GXAttributes attribute,
GXComponentType comptype, GXAttributeType attType, uint offset)
{
Attribute = attribute;
CompType = comptype;
AttType = attType;
DataOffset = offset;
}
private static int GetComponentShift(GXAttributes attribute, GXComponentType type, int compShift)
{
if (attribute == GXAttributes.Normal || attribute == GXAttributes.NormalBinormalTangent)
{
if (type == GXComponentType.U8 || type == GXComponentType.S8)
{
return(6);
}
else if (type == GXComponentType.U16 || type == GXComponentType.S16)
{
return(14);
}
}
return(GetComponentShiftRaw(type, compShift));
}
private static int GetComponentShiftRaw(GXComponentType type, int compShift)
{
switch (type)
{
case GXComponentType.F32:
return(0);
case GXComponentType.U8:
case GXComponentType.U16:
case GXComponentType.S8:
case GXComponentType.S16:
return(compShift);
default:
return(0);
}
}
private static int GetDataStride(GXComponentType compType)
{
switch (compType)
{
case GXComponentType.S8:
case GXComponentType.U8:
return(1);
case GXComponentType.U16:
case GXComponentType.S16:
return(2);
case GXComponentType.F32:
return(4);
}
return(0);
}
private static int GetColorDataStride(GXComponentType compType)
{
switch (compType)
{
case GXComponentType.RGBA4:
case GXComponentType.RGB565:
return(2);
case GXComponentType.RGBA6:
return(6);
case GXComponentType.RGB8:
return(3);
case GXComponentType.RGBX8:
case GXComponentType.RGBA8:
return(4);
}
return(0);
}
