private unsafe void CommitNewConstantBufferBindings_MultiBind()
{
Debug.Assert(_extensions.ARB_MultiBind);
int * buffers = stackalloc int[_maxConstantBufferSlots];
IntPtr *sizes = stackalloc IntPtr[_maxConstantBufferSlots];
IntPtr *offsets = stackalloc IntPtr[_maxConstantBufferSlots];
int currentIndex = 0; // Index into stack allocated buffers.
int currentBaseSlot = -1;
int remainingBuffers = _newConstantBuffersCount;
void AddBinding(OpenGLConstantBuffer cb)
{
buffers[currentIndex] = cb.BufferID;
sizes[currentIndex] = new IntPtr(cb.BufferSize);
currentIndex += 1;
}
void EmitBindings()
{
int count = currentIndex;
GL.BindBuffersRange(BufferRangeTarget.UniformBuffer, currentBaseSlot, count, buffers, offsets, sizes);
Utilities.CheckLastGLError();
currentIndex = 0;
currentBaseSlot = -1;
remainingBuffers -= count;
Debug.Assert(remainingBuffers >= 0);
}
for (int slot = 0; slot < _maxConstantBufferSlots; slot++)
{
OpenGLConstantBuffer cb = _newConstantBuffersBySlot[slot];
if (cb != null)
{
AddBinding(cb);
if (currentBaseSlot == -1)
{
currentBaseSlot = slot;
}
_constantBuffersBySlot[slot] = cb;
}
else if (currentIndex != 0)
{
EmitBindings();
if (remainingBuffers == 0)
{
return;
}
}
}
if (currentIndex != 0)
{
EmitBindings();
}
}
public void BindUniformBuffers(int count, uint[] buffers, IntPtr[] offsets, IntPtr[] sizes)
{
GL.BindBuffersRange(BufferRangeTarget.UniformBuffer, 0, count, buffers, offsets, sizes);
}