private static List <InterleavedSectionBase> ScanTypeSections()
{
List <InterleavedSectionBase> typeSections;
// Determine array item size
uint itemSize = (uint)Marshal.SizeOf(typeof(T));
if (_TypeSections.TryGetValue(typeof(T), out typeSections) == false)
{
// Cache for type
typeSections = new List <InterleavedSectionBase>();
foreach (FieldInfo field in typeof(T).GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance))
{
InterleavedSectionBase structSection = new InterleavedSectionBase();
structSection.ItemType = ArrayBufferItem.GetArrayType(field.FieldType);
structSection.Normalized = false;
structSection.Offset = Marshal.OffsetOf(typeof(T), field.Name);
structSection.Stride = new IntPtr(itemSize);
typeSections.Add(structSection);
}
_TypeSections.Add(typeof(T), typeSections);
}
return(typeSections);
}
public InterleavedSection(ArrayBufferBase arrayBuffer, InterleavedSectionBase otherSection)
{
_ParentArray = arrayBuffer;
ItemType = otherSection.ItemType;
Normalized = otherSection.Normalized;
Offset = otherSection.Offset;
Stride = otherSection.Stride;
}
/// <summary>
/// Construct an ArrayBufferObjectInterleaved specifying its item layout on GPU side.
/// </summary>
/// <param name="format">
/// A <see cref="ArrayBufferItemType"/> describing the item base type on GPU side.
/// </param>
/// <param name="hint">
/// An <see cref="BufferObjectHint"/> that specify the data buffer usage hints.
/// </param>
public ArrayBufferObjectInterleaved(BufferObjectHint hint) : base(hint)
{
try {
// Determine array item size
ItemSize = (uint)Marshal.SizeOf(typeof(T));
// Detect interleaved fields using reflection (cached)
List <InterleavedSectionBase> typeSections;
if (_TypeSections.TryGetValue(typeof(T), out typeSections) == false)
{
// Cache for type
typeSections = new List <InterleavedSectionBase>();
foreach (FieldInfo field in typeof(T).GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance))
{
InterleavedSectionBase structSection = new InterleavedSectionBase();
structSection.ItemType = ArrayBufferItem.GetArrayType(field.FieldType);
structSection.Normalized = false;
structSection.Offset = Marshal.OffsetOf <T>(field.Name);
structSection.Stride = new IntPtr(ItemSize);
typeSections.Add(structSection);
}
_TypeSections.Add(typeof(T), typeSections);
}
// Get array sections for this instance
_InterleavedSections = typeSections.ConvertAll(delegate(InterleavedSectionBase item) {
return(new InterleavedSection(this, item));
});
} catch {
// Avoid finalizer assertion failure (don't call dispose since it's virtual)
GC.SuppressFinalize(this);
throw;
}
}
