public static unsafe void CompactHalf(ref VertexBufferBinding vertexBufferBinding)
{
var vertexElementsWithOffsets = vertexBufferBinding.Declaration
.EnumerateWithOffsets()
.OrderBy(x => x.Offset)
.ToArray();
var vertexElements = new VertexElementConvertInfo[vertexElementsWithOffsets.Length];
int currentOffset = 0;
for (int index = 0; index < vertexElementsWithOffsets.Length; index++)
{
var vertexElementConvertInfo = new VertexElementConvertInfo();
vertexElementConvertInfo.VertexElementWithOffset = vertexElementsWithOffsets[index];
var vertexElement = vertexElementsWithOffsets[index].VertexElement;
var vertexElementFormat = vertexElementConvertInfo.VertexElementWithOffset.VertexElement.Format;
// First iteration?
if (index == 0)
{
currentOffset = vertexElementsWithOffsets[index].Offset;
}
vertexElements[index] = vertexElementConvertInfo;
vertexElementConvertInfo.OldFormat = vertexElementConvertInfo.VertexElementWithOffset.VertexElement.Format;
int offsetShift = 0;
switch (vertexElementFormat)
{
case PixelFormat.R32G32_Float:
vertexElementFormat = PixelFormat.R16G16_Float;
// Adjust next offset if current object has been resized
offsetShift = Utilities.SizeOf <Half2>() - Utilities.SizeOf <Vector2>();
break;
case PixelFormat.R32G32B32_Float:
vertexElementFormat = PixelFormat.R16G16B16A16_Float;
// Adjust next offset if current object has been resized
offsetShift = Utilities.SizeOf <Half4>() - Utilities.SizeOf <Vector3>();
break;
case PixelFormat.R32G32B32A32_Float:
vertexElementFormat = PixelFormat.R16G16B16A16_Float;
// Adjust next offset if current object has been resized
offsetShift = Utilities.SizeOf <Half4>() - Utilities.SizeOf <Vector4>();
break;
}
// Has format changed?
vertexElementConvertInfo.NeedConversion = vertexElementFormat != vertexElementConvertInfo.VertexElementWithOffset.VertexElement.Format;
// Create new vertex element with adjusted offset, and maybe new vertex format (if modified)
vertexElementConvertInfo.VertexElementWithOffset.VertexElement
= new VertexElement(vertexElement.SemanticName, vertexElement.SemanticIndex, vertexElementFormat, currentOffset);
// Increment next offset by the same difference as in original declaration
if (index + 1 < vertexElementsWithOffsets.Length)
{
currentOffset += vertexElementsWithOffsets[index + 1].Offset - vertexElementsWithOffsets[index].Offset;
}
currentOffset += offsetShift;
vertexElements[index] = vertexElementConvertInfo;
}
var oldVertexStride = vertexBufferBinding.Declaration.VertexStride;
var vertexDeclaration = new VertexDeclaration(vertexElements.Select(x => x.VertexElementWithOffset.VertexElement).ToArray());
var newVertexStride = vertexDeclaration.VertexStride;
var newBufferData = new byte[vertexBufferBinding.Count * newVertexStride];
fixed(byte *oldBuffer = &vertexBufferBinding.Buffer.GetSerializationData().Content[vertexBufferBinding.Offset])
fixed(byte *newBuffer = &newBufferData[0])
{
var oldBufferVertexPtr = (IntPtr)oldBuffer;
var newBufferVertexPtr = (IntPtr)newBuffer;
for (int i = 0; i < vertexBufferBinding.Count; ++i)
{
foreach (var element in vertexElements)
{
var oldBufferElementPtr = oldBufferVertexPtr + element.VertexElementWithOffset.Offset;
var newBufferElementPtr = newBufferVertexPtr + element.VertexElementWithOffset.VertexElement.AlignedByteOffset;
if (element.NeedConversion)
{
// Convert floatX => halfX
switch (element.OldFormat)
{
case PixelFormat.R32G32_Float:
*((Half2 *)newBufferElementPtr) = (Half2)(*((Vector2 *)oldBufferElementPtr));
break;
case PixelFormat.R32G32B32_Float:
// Put 1.0f in
*((Half4 *)newBufferElementPtr) = (Half4)(new Vector4(*((Vector3 *)oldBufferElementPtr), 1.0f));
break;
case PixelFormat.R32G32B32A32_Float:
*((Half4 *)newBufferElementPtr) = (Half4)(*((Vector4 *)oldBufferElementPtr));
break;
}
}
else
{
// Copy as is
Utilities.CopyMemory(newBufferElementPtr, oldBufferElementPtr, element.VertexElementWithOffset.Size);
}
}
oldBufferVertexPtr += oldVertexStride;
newBufferVertexPtr += newVertexStride;
}
}
vertexBufferBinding = new VertexBufferBinding(new BufferData(BufferFlags.VertexBuffer, newBufferData).ToSerializableVersion(), vertexDeclaration, vertexBufferBinding.Count);
}
public unsafe static void CompactHalf(ref VertexBufferBinding vertexBufferBinding)
{
var vertexElementsWithOffsets = vertexBufferBinding.Declaration
.EnumerateWithOffsets()
.OrderBy(x => x.Offset)
.ToArray();
var vertexElements = new VertexElementConvertInfo[vertexElementsWithOffsets.Length];
int currentOffset = 0;
for (int index = 0; index < vertexElementsWithOffsets.Length; index++)
{
var vertexElementConvertInfo = new VertexElementConvertInfo();
vertexElementConvertInfo.VertexElementWithOffset = vertexElementsWithOffsets[index];
var vertexElement = vertexElementsWithOffsets[index].VertexElement;
var vertexElementFormat = vertexElementConvertInfo.VertexElementWithOffset.VertexElement.Format;
// First iteration?
if (index == 0)
currentOffset = vertexElementsWithOffsets[index].Offset;
vertexElements[index] = vertexElementConvertInfo;
vertexElementConvertInfo.OldFormat = vertexElementConvertInfo.VertexElementWithOffset.VertexElement.Format;
int offsetShift = 0;
switch (vertexElementFormat)
{
case PixelFormat.R32G32_Float:
vertexElementFormat = PixelFormat.R16G16_Float;
// Adjust next offset if current object has been resized
offsetShift = Utilities.SizeOf<Half2>() - Utilities.SizeOf<Vector2>();
break;
case PixelFormat.R32G32B32_Float:
vertexElementFormat = PixelFormat.R16G16B16A16_Float;
// Adjust next offset if current object has been resized
offsetShift = Utilities.SizeOf<Half4>() - Utilities.SizeOf<Vector3>();
break;
case PixelFormat.R32G32B32A32_Float:
vertexElementFormat = PixelFormat.R16G16B16A16_Float;
// Adjust next offset if current object has been resized
offsetShift = Utilities.SizeOf<Half4>() - Utilities.SizeOf<Vector4>();
break;
}
// Has format changed?
vertexElementConvertInfo.NeedConversion = vertexElementFormat != vertexElementConvertInfo.VertexElementWithOffset.VertexElement.Format;
// Create new vertex element with adjusted offset, and maybe new vertex format (if modified)
vertexElementConvertInfo.VertexElementWithOffset.VertexElement
= new VertexElement(vertexElement.semanticName, vertexElement.SemanticIndex, vertexElementFormat, currentOffset);
// Increment next offset by the same difference as in original declaration
if (index + 1 < vertexElementsWithOffsets.Length)
currentOffset += vertexElementsWithOffsets[index + 1].Offset - vertexElementsWithOffsets[index].Offset;
currentOffset += offsetShift;
vertexElements[index] = vertexElementConvertInfo;
}
var oldVertexStride = vertexBufferBinding.Declaration.VertexStride;
var vertexDeclaration = new VertexDeclaration(vertexElements.Select(x => x.VertexElementWithOffset.VertexElement).ToArray());
var newVertexStride = vertexDeclaration.VertexStride;
var newBufferData = new byte[vertexBufferBinding.Count * newVertexStride];
fixed (byte* oldBuffer = &vertexBufferBinding.Buffer.GetSerializationData().Content[vertexBufferBinding.Offset])
fixed (byte* newBuffer = &newBufferData[0])
{
var oldBufferVertexPtr = (IntPtr)oldBuffer;
var newBufferVertexPtr = (IntPtr)newBuffer;
for (int i = 0; i < vertexBufferBinding.Count; ++i)
{
foreach (var element in vertexElements)
{
var oldBufferElementPtr = oldBufferVertexPtr + element.VertexElementWithOffset.Offset;
var newBufferElementPtr = newBufferVertexPtr + element.VertexElementWithOffset.VertexElement.AlignedByteOffset;
if (element.NeedConversion)
{
// Convert floatX => halfX
switch (element.OldFormat)
{
case PixelFormat.R32G32_Float:
*((Half2*)newBufferElementPtr) = (Half2)(*((Vector2*)oldBufferElementPtr));
break;
case PixelFormat.R32G32B32_Float:
// Put 1.0f in
*((Half4*)newBufferElementPtr) = (Half4)(new Vector4(*((Vector3*)oldBufferElementPtr), 1.0f));
break;
case PixelFormat.R32G32B32A32_Float:
*((Half4*)newBufferElementPtr) = (Half4)(*((Vector4*)oldBufferElementPtr));
break;
}
}
else
{
// Copy as is
Utilities.CopyMemory(newBufferElementPtr, oldBufferElementPtr, element.VertexElementWithOffset.Size);
}
}
oldBufferVertexPtr += oldVertexStride;
newBufferVertexPtr += newVertexStride;
}
}
vertexBufferBinding = new VertexBufferBinding(new BufferData(BufferFlags.VertexBuffer, newBufferData).ToSerializableVersion(), vertexDeclaration, vertexBufferBinding.Count);
}
