internal static int GlTargetTobufferTargetIndex(glBuffer.BindTarget Target)
{
switch (Target)
{
case glBuffer.BindTarget.GL_ARRAY_BUFFER: return(0);
case glBuffer.BindTarget.GL_ELEMENT_ARRAY_BUFFER: return(1);
case glBuffer.BindTarget.GL_PIXEL_PACK_BUFFER: return(2);
case glBuffer.BindTarget.GL_PIXEL_UNPACK_BUFFER: return(3);
}
return(0);
}
internal void BufferData(glBuffer Buffer, glBuffer.BindTarget Target, int Size, IntPtr Data, glBuffer.Usage Usage)
{
int indexTarget = GlTargetTobufferTargetIndex(Target);
if (Size < 0)
{
throw new Exception("Negative buffer size are not allowed");
}
lock (_Buffers)
{
if (_Buffers[indexTarget] != Buffer)
{
throw new Exception("Trying to set buffer data while the buffer is not bound to the specified target");
}
_glBufferData((int)Target, new IntPtr(Size), Data.ToPointer(), (int)Usage);
}
}
internal void BindBuffer(glBuffer Buffer, glBuffer.BindTarget Target)
{
int indexTarget = GlTargetTobufferTargetIndex(Target);
lock (_Buffers)
{
if (Buffer == null)
{
_glBindBuffer((int)Target, 0);
_Buffers[indexTarget] = null;
}
else
{
_glBindBuffer((int)Target, Buffer.Handle);
_Buffers[indexTarget] = Buffer;
}
}
}
