private void SetBufferData <T>(int bufferSize, int elementSizeInBytes, int offsetInBytes, T[] data, int startIndex, int elementCount, int vertexStride, RVertexDataOptions options) where T : struct
{
GenerateIfRequired();
var sizeInBytes = elementSizeInBytes * elementCount;
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
REngine.CheckGLError();
if (options == RVertexDataOptions.Discard)
{
// By assigning NULL data to the buffer this gives a hint
// to the device to discard the previous content.
GL.BufferData(BufferTarget.ArrayBuffer,
(IntPtr)bufferSize,
IntPtr.Zero,
_isDynamic ? BufferUsageHint.StreamDraw : BufferUsageHint.StaticDraw);
REngine.CheckGLError();
}
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
var dataPtr = (IntPtr)(dataHandle.AddrOfPinnedObject().ToInt64() + startIndex * elementSizeInBytes);
GL.BufferSubData(BufferTarget.ArrayBuffer, (IntPtr)offsetInBytes, (IntPtr)sizeInBytes, dataPtr);
REngine.CheckGLError();
dataHandle.Free();
}
private void BufferData <T>(int offsetInBytes, T[] data, int startIndex, int elementCount, RVertexDataOptions options) where T : struct
{
GenerateIfRequired();
var elementSizeInByte = Marshal.SizeOf(typeof(T));
var sizeInBytes = elementSizeInByte * elementCount;
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
var dataPtr = (IntPtr)(dataHandle.AddrOfPinnedObject().ToInt64() + startIndex * elementSizeInByte);
var bufferSize = IndexCount * (IndexElementSize == RIndexElementSize.SixteenBits ? 2 : 4);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ibo);
REngine.CheckGLError();
if (options == RVertexDataOptions.Discard)
{
// By assigning NULL data to the buffer this gives a hint
// to the device to discard the previous content.
GL.BufferData(BufferTarget.ElementArrayBuffer,
(IntPtr)bufferSize,
IntPtr.Zero,
_isDynamic ? BufferUsageHint.StreamDraw : BufferUsageHint.StaticDraw);
REngine.CheckGLError();
}
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)bufferSize, dataPtr, _isDynamic ? BufferUsageHint.StreamDraw : BufferUsageHint.StaticDraw);
REngine.CheckGLError();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
REngine.CheckGLError();
dataHandle.Free();
}
protected void SetDataInternal <T>(int offsetInBytes, T[] data, int startIndex, int elementCount, int vertexStride, RVertexDataOptions options) where T : struct
{
if (data == null)
{
throw new ArgumentNullException("data is null");
}
if (data.Length < (startIndex + elementCount))
{
throw new InvalidOperationException("The array specified in the data parameter is not the correct size for the amount of data requested.");
}
var bufferSize = VertexCount * VertexDeclaration.VertexStride;
if ((vertexStride > bufferSize) || (vertexStride < VertexDeclaration.VertexStride))
{
throw new ArgumentOutOfRangeException("One of the following conditions is true:\nThe vertex stride is larger than the vertex buffer.\nThe vertex stride is too small for the type of data requested.");
}
var elementSizeInBytes = Marshal.SizeOf(typeof(T));
if (Threading.IsOnUIThread())
{
SetBufferData(bufferSize, elementSizeInBytes, offsetInBytes, data, startIndex, elementCount, vertexStride, options);
}
else
{
Threading.BlockOnUIThread(() => SetBufferData(bufferSize, elementSizeInBytes, offsetInBytes, data, startIndex, elementCount, vertexStride, options));
}
}
protected void SetDataInternal <T>(int offsetInBytes, T[] data, int startIndex, int elementCount, RVertexDataOptions options) where T : struct
{
if (data == null)
{
throw new ArgumentNullException("data", "data is null");
}
if (data.Length < (startIndex + elementCount))
{
throw new InvalidOperationException("The array specified in the data parameter is not the correct size for the amount of data requested.");
}
if (Threading.IsOnUIThread())
{
BufferData(offsetInBytes, data, startIndex, elementCount, options);
}
else
{
Threading.BlockOnUIThread(() => BufferData(offsetInBytes, data, startIndex, elementCount, options));
}
}