protected override void WriteBlock(DrawState state, IndexType[] data, int startIndex, int start, int length, object target, object parent)
{
state.UnbindBuffer((IndexBuffer)target);
if (start == 0 && length == ((IndexBuffer)target).SizeInBytes)
{
min = default(IndexType);
max = default(IndexType);
}
processor(data, length, this);
#if !XBOX360
if (target is DynamicIndexBuffer)
{
#if DEBUG
state.Application.currentFrame.DynamicIndexBufferByesCopied += Stride * length;
#endif
SetDataOptions setOp = SetDataOptions.None;
if (sequentialWriteFlag)
{
if (start == 0)
{
setOp = SetDataOptions.Discard;
}
else
{
setOp = SetDataOptions.NoOverwrite;
#if DEBUG
if (start < previousCopyEnd)
{
throw new InvalidOperationException("ResourceUsage.DynamicSequential data overwrite detected");
}
#endif
}
#if DEBUG
previousCopyEnd = start + length * Stride;
#endif
}
else
if (start == 0 && length * Stride == ((DynamicIndexBuffer)target).SizeInBytes)
{
setOp = SetDataOptions.Discard;
}
((DynamicIndexBuffer)target).SetData(start, data, startIndex, length, setOp);
}
else
#endif
{
#if DEBUG
#if XBOX360
if (target is DynamicIndexBuffer)
{
state.Application.currentFrame.DynamicIndexBufferByesCopied += Stride * length;
}
else
#endif
state.Application.currentFrame.IndexBufferByesCopied += Stride * length;
#endif
#if XBOX360
int instancingCount = Math.Max(this.instancingCount, 1);
//instancing requires data is duplicated over the index buffer multiple times, with an offset
//added to each duplication
if (instancingCount >= 1 && !convertToInt)
{
((IndexBuffer)target).SetData(start, data, startIndex, length);
}
if (instancingCount > 1)
{
int max = this.i_max;
IndexBufferProcessor.Update(this, out i_min, out i_max);
if (max == 0)
{
if (start != 0 || length * Stride != ((IndexBuffer)target).SizeInBytes / instancingCount / (convertToInt ? 2 : 1))
{
throw new ArgumentException("XBOX Instancing error: Instancing requires the first index buffer write to copy the entire buffer");
}
}
else
{
if (this.i_max > max)
{
throw new ArgumentException("XBOX Instancing error: Max index in the index buffer has increased from the first write");
}
}
//copy in multiple versions of the same indices
if (convertToInt)
{
uint[] buffer = null;
try
{
uint increment = (uint)(this.i_max + 1);
buffer = IndexBufferProcessor.BeginLock <uint>(length);
//foreach instance copy, make a copy of the data.
for (int i = 0; i < instancingCount; i++)
{
IndexBufferProcessor.CopyIncrementToInt(data, buffer, length, (uint)(increment * i));
((IndexBuffer)target).SetData(start + length * 4 * i, buffer, startIndex, length);
}
}
finally
{
IndexBufferProcessor.EndLock <uint>(buffer);
}
}
else
{
IndexType[] buffer = null;
try
{
uint increment = (uint)(this.i_max + 1);
buffer = IndexBufferProcessor.BeginLock <IndexType>(length);
//foreach instance copy, make a copy of the data.
for (int i = 1; i < instancingCount; i++)
{
IndexBufferProcessor.CopyIncrement(data, buffer, length, (uint)(increment * i));
((IndexBuffer)target).SetData(start + length * Stride * i, buffer, startIndex, length);
}
}
finally
{
IndexBufferProcessor.EndLock <IndexType>(buffer);
}
}
IndexType[] da = new IndexType[((IndexBuffer)target).SizeInBytes / Stride];
((IndexBuffer)target).GetData(da);
da = null;
}
#else
((IndexBuffer)target).SetData(start, data, startIndex, length);
#endif
}
}
protected override void WriteComplete()
{
IndexBufferProcessor.Update(this, out i_min, out i_max);
complete = true;
}
public Implementation(IEnumerable <IndexType> vertices) : base(vertices)
{
IndexBufferProcessor.Init(this);
}
