unsafe public XnaHardwareIndexBuffer( HardwareBufferManagerBase manager, IndexType type, int numIndices, BufferUsage usage, XFG.GraphicsDevice device, bool useSystemMemory, bool useShadowBuffer )
: base( manager, type, numIndices, usage, useSystemMemory, useShadowBuffer )
{
_bufferType = ( type == IndexType.Size16 ) ? XFG.IndexElementSize.SixteenBits : XFG.IndexElementSize.ThirtyTwoBits;
// create the buffer
if (usage == BufferUsage.Dynamic || usage == BufferUsage.DynamicWriteOnly)
{
_xnaBuffer = new XFG.IndexBuffer(device, _bufferType, numIndices, XnaHelper.Convert(usage));
}
else
_xnaBuffer = new XFG.IndexBuffer(device, _bufferType, numIndices, XFG.BufferUsage.None);
_bufferBytes = new byte[ sizeInBytes ];
_bufferBytes.Initialize();
}
public IndexBuffer(DisposableI parent, BufferUsages bufferUsage, int[] indices)
: base(parent, bufferUsage, indices)
{
try
{
video = parent.FindParentOrSelfWithException <Video>();
#if SILVERLIGHT
X.IndexElementSize elementSize = X.IndexElementSize.SixteenBits;
#else
X.IndexElementSize elementSize = _32BitIndices ? X.IndexElementSize.ThirtyTwoBits : X.IndexElementSize.SixteenBits;
#endif
indexBuffer = new X.IndexBuffer(video.Device, elementSize, indices.Length, X.BufferUsage.WriteOnly);
Update(indices, indexCount);
}
catch (Exception e)
{
Dispose();
throw e;
}
}