public static extern unsafe void FNA3D_ApplyVertexBufferBindings(
IntPtr device,
FNA3D_VertexBufferBinding *bindings,
int numBindings,
byte bindingsUpdated,
int baseVertex
);
//
// Set Buffer Attributes
//
public static unsafe void FNA3D_ApplyVertexBufferBindings(IntPtr device,
FNA3D_VertexBufferBinding *bindings,
int numBindings, byte bindingsUpdated,
int baseVertex)
{
/* skip if FNA says the bindings have not been updated
* if (baseVertex == ((State) renderer.UserData).BaseVertex.getAndSet(baseVertex))
* {
* if (bindingsUpdated == 0)
* return;
* }*/
var bindingsCopy = new FNA3D_VertexBufferBinding[numBindings];
for (int i = 0; i < numBindings; i++)
{
bindingsCopy[i] = bindings[i];
}
Renderer.Get(device).Send(false, () =>
{
int nextAttribIndex = 0;
foreach (var binding in bindingsCopy)
{
if (binding.instanceFrequency != 0)
{
throw new ArgumentException("InstanceFrequnecy != 0");
}
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, (int)binding.vertexBuffer);
var vertexDecl = binding.vertexDeclaration;
var elements = (VertexElement[])System.Runtime.InteropServices.GCHandle
.FromIntPtr(vertexDecl.elements).Target;
for (int j = 0; j < vertexDecl.elementCount; j++)
{
if (elements[j].UsageIndex != 0)
{
throw new ArgumentException("UsageIndex != 0");
}
var fmt = elements[j].VertexElementFormat;
int size = VertexElementToBindingSize[(int)fmt];
int type = VertexElementToBindingType[(int)fmt];
bool norm = (elements[j].VertexElementUsage ==
VertexElementUsage.Color ||
fmt == VertexElementFormat.NormalizedShort2 ||
fmt == VertexElementFormat.NormalizedShort4);
int stride = vertexDecl.vertexStride;
int offset = (binding.vertexOffset + baseVertex) * stride
+ elements[j].Offset;
GLES20.glVertexAttribPointer(nextAttribIndex, size, type, norm,
stride, offset);
GLES20.glEnableVertexAttribArray(nextAttribIndex++);
}
}
});
}
