/// <summary>
/// Update the reference Buffer, using this technique.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
public override void Create(GraphicsContext ctx)
{
if (ctx.Extensions.DirectStateAccess_ARB || ctx.Version.IsCompatible(Gl.Version_450))
{
if (!ctx.Extensions.BufferStorage_ARB || !Buffer.Immutable)
{
// Emulates glBufferStorage error checking (only for size)
if (Buffer.Immutable && Buffer.Size != 0)
{
throw new GlException(ErrorCode.InvalidOperation);
}
Gl.NamedBufferData(Buffer.ObjectName, _Size, _Array, Buffer.Hint);
}
else
{
if (Buffer.Immutable)
{
Gl.NamedBufferStorage(Buffer.ObjectName, _Size, _Array, Buffer.UsageMask);
}
else
{
Gl.NamedBufferData(Buffer.ObjectName, _Size, _Array, Buffer.Hint);
}
}
}
else
{
if (!ctx.Extensions.BufferStorage_ARB || !Buffer.Immutable)
{
// Emulates glBufferStorage error checking (only for size)
if (Buffer.Immutable && Buffer.Size != 0)
{
throw new GlException(ErrorCode.InvalidOperation);
}
Gl.BufferData(Buffer.Target, _Size, _Array, Buffer.Hint);
}
else
{
if (Buffer.Immutable)
{
Gl.BufferStorage(Buffer.Target, _Size, _Array, Buffer.UsageMask);
}
else
{
Gl.BufferData(Buffer.Target, _Size, _Array, Buffer.Hint);
}
}
}
// Explictly check for errors
Gl.CheckErrors();
Buffer.Size = _Size;
}
/// <summary>
/// Create the texture, using this technique.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
public override void Create(GraphicsContext ctx)
{
if (!Buffer.Immutable || !ctx.Extensions.BufferStorage_ARB)
{
Gl.BufferData(Buffer.Target, _Size, _Array, Buffer.Hint);
}
else
{
Gl.BufferStorage(Buffer.Target, _Size, _Array, Buffer.UsageMask);
}
Buffer.Size = _Size;
}
/// <summary>
/// Reset the allocated GPU buffer for this Buffer.
/// </summary>
/// <param name="ctx">
///
/// </param>
/// <param name="size">
/// A <see cref="UInt32"/> that determine the size of the buffer object GPU buffer, in bytes.
/// </param>
/// <param name="data">
///
/// </param>
protected void CreateGpuBuffer(GraphicsContext ctx, uint size, IntPtr data)
{
if (Immutable && _GpuBufferSize > 0)
{
throw new InvalidOperationException("buffer is immutable");
}
if (Immutable && ctx.Extensions.BufferStorage_ARB)
{
Gl.BufferStorage(Target, size, data, (uint)_UsageMask);
Gl.CheckErrors();
}
else
{
Gl.BufferData(Target, size, data, Hint);
if (CpuBufferAddress != IntPtr.Zero)
{
Gl.BufferSubData(Target, IntPtr.Zero, _GpuBufferSize, CpuBufferAddress);
}
}
// Store GPU buffer size
_GpuBufferSize = size;
}
private void CreateCompatible(GraphicsContext ctx)
{
if (!ctx.Extensions.BufferStorage_ARB || !Buffer.Immutable)
{
// Emulates glBufferStorage error checking (only for size)
if (Buffer.Immutable && Buffer.Size != 0)
{
throw new GlException(ErrorCode.InvalidOperation);
}
Gl.BufferData(Buffer.Target, _Size, IntPtr.Zero, Buffer.Hint);
}
else
{
if (Buffer.Immutable)
{
Gl.BufferStorage(Buffer.Target, _Size, IntPtr.Zero, Buffer.UsageMask);
}
else
{
Gl.BufferData(Buffer.Target, _Size, IntPtr.Zero, Buffer.Hint);
}
}
}
