private void VertexAttribIPointer(uint index, int size, VertexAttribIType type, int stride, IntPtr pointer)
{
// TODO: GL_INVALID_VALUE is generated if index is greater than or equal to GL_MAX_VERTEX_ATTRIBS.
if (size != 1 && size != 2 && size != 3 && size != 4)
{
SetLastError(ErrorCode.InvalidValue); return;
}
if (!Enum.IsDefined(typeof(VertexAttribIType), type))
{
SetLastError(ErrorCode.InvalidEnum); return;
}
if (stride < 0)
{
SetLastError(ErrorCode.InvalidValue); return;
}
VertexArrayObject vao = this.currentVertexArrayObject;
if (vao == null)
{
SetLastError(ErrorCode.InvalidOperation); return;
}
GLBuffer buffer = this.currentBufferDict[BindBufferTarget.ArrayBuffer];
// GL_INVALID_OPERATION is generated if zero is bound to the GL_ARRAY_BUFFER buffer object binding point and the pointer argument is not NULL.
// TODO: why only when "pointer argument is not NULL"?
if (buffer == null)
{
SetLastError(ErrorCode.InvalidOperation); return;
}
VertexAttribDesc desc = null;
if (!vao.LocVertexAttribDict.TryGetValue(index, out desc))
{
desc = new VertexAttribDesc();
vao.LocVertexAttribDict.Add(index, desc);
}
desc.inLocation = index;
desc.vbo = buffer;
desc.dataSize = size;
desc.dataType = (uint)type;
//desc.normalize = false; // not needed.
desc.startPos = (uint)pointer.ToInt32();
desc.stride = (uint)stride;
}
public abstract void VertexAttribIFormat([Flow(FlowDirection.In)] uint index, [Flow(FlowDirection.In)] int size, [Flow(FlowDirection.In)] VertexAttribIType type, [Flow(FlowDirection.In)] uint stride);
public partial void VertexAttribIFormat([Flow(FlowDirection.In)] uint attribindex, [Flow(FlowDirection.In)] int size, [Flow(FlowDirection.In)] VertexAttribIType type, [Flow(FlowDirection.In)] uint relativeoffset);
public static unsafe void VertexAttribIPointer <T0>(this ExtGpuShader4 thisApi, [Flow(FlowDirection.In)] uint index, [Flow(FlowDirection.In)] int size, [Flow(FlowDirection.In)] VertexAttribIType type, [Flow(FlowDirection.In)] uint stride, [Count(Computed = "size, type, stride"), Flow(FlowDirection.In)] ReadOnlySpan <T0> pointer) where T0 : unmanaged
{
// SpanOverloader
thisApi.VertexAttribIPointer(index, size, type, stride, in pointer.GetPinnableReference());
}
