public VertexInputBindingDescription
(
uint binding = default,
uint stride = default,
VertexInputRate inputRate = default
)
{
Binding = binding;
Stride = stride;
InputRate = inputRate;
}
internal static VkVertexInputRate ConvertVertexInputRate(this VertexInputRate rate)
{
switch (rate)
{
case VertexInputRate.Vertex:
return(VkVertexInputRate.Vertex);
case VertexInputRate.Instance:
return(VkVertexInputRate.Instance);
default:
throw new ArgumentOutOfRangeException(nameof(rate));
}
}
/// <summary>
/// Create a new instance of <see cref="VertexLayoutDescriptor"/> struct. The stride is assumed to be the sum of the size of all elements.
/// </summary>
/// <param name="attributes">An array of <see cref="VertexAttributeDescriptor"/> objects, each describing a single element
/// of vertex data.</param>
public VertexLayoutDescriptor(params VertexAttributeDescriptor[] attributes)
{
Attributes = attributes;
var stride = 0;
for (int i = 0; i < attributes.Length; i++)
{
int elementSize = VertexFormatUtil.GetSizeInBytes(attributes[i].Format);
if (attributes[i].Offset != 0)
{
stride = attributes[i].Offset + elementSize;
}
else
{
stride += elementSize;
}
}
Stride = stride;
InputRate = VertexInputRate.Vertex;
}
/// <summary>
/// Initializes a new instance of the <see cref="VertexInputBinding"/> class.
/// </summary>
/// <param name="binding">The binding number that this structure describes.</param>
/// <param name="stride">
/// The distance in bytes between two consecutive elements within the buffer.
/// </param>
/// <param name="inputRate">
/// Specifies whether vertex attribute addressing is a function of the vertex index or of the
/// instance index.
/// </param>
public VertexInputBinding(int binding, int stride, VertexInputRate inputRate)
{
Binding = binding;
Stride = stride;
InputRate = inputRate;
}
/// <summary>
/// Create a new instance of <see cref="VertexLayoutDescriptor"/> struct.
/// </summary>
/// <param name="stride">The number of bytes in between successive elements in the <see cref="GraphicsBuffer"/>.</param>
/// <param name="inputRate">The <see cref="VertexInputRate"/>.</param>
/// <param name="attributes">An array of <see cref="VertexAttributeDescriptor"/> objects, each describing a single element
/// of vertex data.</param>
public VertexLayoutDescriptor(int stride, VertexInputRate inputRate, params VertexAttributeDescriptor[] attributes)
{
Stride = stride;
Attributes = attributes;
InputRate = inputRate;
}
/// <summary>
///
/// </summary>
public VertexInputBindingDescription(uint binding, uint stride, VertexInputRate inputRate)
{
this.Binding = binding;
this.Stride = stride;
this.InputRate = inputRate;
}
public VertexInput[] GetVertexInput(IEnumerable <uint> bindingsWithInstanceRate = null)
{
List <VertexInput> vertexInputs = new List <VertexInput>();
IEnumerable <VertexInputSegment> vertexInputSegments = _segmentCollection.GetSegments <VertexInputSegment>();
for (int i = 0; i < vertexInputSegments.Count(); i++)
{
VertexInputSegment vertexInputSegment = vertexInputSegments.ElementAt(i);
Type type = Constants.GlslToNetType[vertexInputSegment.GlslType];
VertexInputRate inputRate = VertexInputRate.Vertex;
if (bindingsWithInstanceRate != null && bindingsWithInstanceRate.Contains(vertexInputSegment.Binding))
{
inputRate = VertexInputRate.Instance;
}
uint stride = Constants.TypeToSize[type];
Format format = Constants.TypeToVertexInputFormat[type];
if (!Constants.TypesWithMultipleLocations.Contains(type))
{
VertexInput vertexInput = new VertexInput()
{
Name = vertexInputSegment.Name,
GlslType = vertexInputSegment.GlslType,
Binding = vertexInputSegment.Binding,
InputRate = inputRate,
Stride = stride,
Format = format,
Location = vertexInputSegment.Binding,
Offset = 0,
};
vertexInputs.Add(vertexInput);
}
else
{
int occupiedSpaces = Constants.TypeToOccupiedVertexInputLocations[type];
for (uint j = 0; j < occupiedSpaces; j++)
{
uint offset = (uint)j * Constants.TypeToOffsetStrideSize[type];
VertexInput vertexInput = new VertexInput()
{
Name = vertexInputSegment.Name,
GlslType = vertexInputSegment.GlslType,
Binding = vertexInputSegment.Binding,
InputRate = inputRate,
Stride = stride,
Format = format,
Location = vertexInputSegment.Binding + j,
Offset = offset,
};
vertexInputs.Add(vertexInput);
}
}
}
return(vertexInputs.ToArray());
}
