/// <summary>
/// Link a <see cref="ShaderStorageBuffer"/> to this ShaderProgram.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for operations.
/// </param>
/// <param name="storageBufferName">
/// A <see cref="String"/> that specify the variable name in the shader source.
/// </param>
/// <param name="storageBuffer">
/// The <see cref="Buffer"/> to be linked to <paramref name="storageBufferName"/>.
/// </param>
public void SetStorageBuffer(GraphicsContext ctx, string storageBufferName, Buffer storageBuffer)
{
CheckCurrentContext(ctx);
if (storageBufferName == null)
{
throw new ArgumentNullException(nameof(storageBufferName));
}
CheckThisExistence(ctx);
CheckThatExistence(ctx, storageBuffer);
if (!ctx.Extensions.ShaderStorageBufferObject_ARB)
{
throw new InvalidOperationException("GL_ARB_shader_storage_buffer_object not supported");
}
StorageBufferBinding storageBufferBinding;
if (!_StorageBufferMap.TryGetValue(storageBufferName, out storageBufferBinding))
{
throw new InvalidOperationException($"unrecognized storage buffer '{storageBufferName}'");
}
// Bind to the most appropriate binding index
IBindingIndexResource bindingIndexResource = storageBuffer;
ctx.BindIndex(bindingIndexResource);
// Avoid unnecessary glShaderStorageBlockBinding call
//if (storageBufferBinding.BufferBinding == bindingIndexResource.BindingIndex)
// return;
Gl.ShaderStorageBlockBinding(ObjectName, storageBufferBinding.Index, bindingIndexResource.BindingIndex);
storageBufferBinding.BufferBinding = bindingIndexResource.BindingIndex;
}
