/// <summary>
/// Initialize and setup uniform block's value.
/// </summary>
/// <param name="program"></param>
/// <returns></returns>
private UniformBuffer Initialize(ShaderProgram program)
{
if (glGetUniformBlockIndex == null)
{
glGetUniformBlockIndex = GL.Instance.GetDelegateFor("glGetUniformBlockIndex", GLDelegates.typeof_uint_uint_string) as GLDelegates.uint_uint_string;
glGetActiveUniformBlockiv = GL.Instance.GetDelegateFor("glGetActiveUniformBlockiv", GLDelegates.typeof_uint_uint_uint_uint_uintN) as GLDelegates.uint_uint_uint_uint_uintN;
}
uint uboIndex = glGetUniformBlockIndex(program.ProgramId, this.VarName);
var uboSize = new uint[1];
glGetActiveUniformBlockiv(program.ProgramId, uboIndex, GL.GL_UNIFORM_BLOCK_DATA_SIZE, uboSize);
byte[] bytes = this.value.ToBytes();
UniformBuffer result = bytes.GenUniformBuffer(BufferUsage.StaticDraw);
// another way to do this:
//UniformBuffer result = UniformBuffer.Create(typeof(byte), bytes.Length, BufferUsage.StaticDraw);
//unsafe
//{
// var array = (byte*)result.MapBuffer(MapBufferAccess.WriteOnly);
// for (int i = 0; i < bytes.Length; i++)
// {
// array[i] = bytes[i];
// }
// result.UnmapBuffer();
//}
//glBindBufferBase(GL.GL_UNIFORM_BUFFER, uboIndex, result.BufferId);
//glBindBufferBase(GL.GL_UNIFORM_BUFFER, 0, result.BufferId);
//glUniformBlockBinding(program.ProgramId, uboIndex, 0);
result.Binding(program, uboIndex, 0);
result.Unbind();
return(result);
}
/// <summary>
/// Creates a sub-type of <see cref="GLBuffer"/> object directly in server side(GPU) without initializing its value.
/// </summary>
/// <param name="target"></param>
/// <param name="elementType"></param>
/// <param name="length"></param>
/// <param name="usage"></param>
/// <returns></returns>
public static GLBuffer Create(IndependentBufferTarget target, Type elementType, int length, BufferUsage usage)
{
if (!elementType.IsValueType)
{
throw new ArgumentException(string.Format("{0} must be a value type!", elementType));
}
uint bufferTarget = (uint)target;
int byteLength = Marshal.SizeOf(elementType) * length;
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
glBindBuffer(bufferTarget, buffers[0]);
glBufferData(bufferTarget, byteLength, IntPtr.Zero, (uint)usage);
glBindBuffer(bufferTarget, 0);
GLBuffer buffer;
switch (target)
{
case IndependentBufferTarget.AtomicCounterBuffer:
buffer = new AtomicCounterBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.PixelPackBuffer:
buffer = new PixelPackBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.PixelUnpackBuffer:
buffer = new PixelUnpackBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.ShaderStorageBuffer:
buffer = new ShaderStorageBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.TextureBuffer:
buffer = new TextureBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.UniformBuffer:
buffer = new UniformBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.TransformFeedbackBuffer:
buffer = new TransformFeedbackBuffer(buffers[0], length, byteLength);
break;
default:
throw new Exception("Unexpected IndependentBufferTarget!");
}
return(buffer);
}
///// <summary>
///// Generates an atomic counter buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static AtomicCounterBuffer GenAtomicCounterBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.AtomicCounterBuffer, usage) as AtomicCounterBuffer;
//}
///// <summary>
///// Generates a pixel pack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelPackBuffer GenPixelPackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelPackBuffer, usage) as PixelPackBuffer;
//}
///// <summary>
///// Generates a pixel unpack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelUnpackBuffer GenPixelUnpackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelUnpackBuffer, usage) as PixelUnpackBuffer;
//}
///// <summary>
///// Generates a shader storage buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static ShaderStorageBuffer GenShaderStorageBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.ShaderStorageBuffer, usage) as ShaderStorageBuffer;
//}
///// <summary>
///// Generates a texture buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static TextureBuffer GenTextureBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.TextureBuffer, usage) as TextureBuffer;
//}
///// <summary>
///// Generates an uniform buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static UniformBuffer GenUniformBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.UniformBuffer, usage) as UniformBuffer;
//}
/// <summary>
/// Generates an independent buffer.
/// </summary>
/// <param name="array"></param>
/// <param name="bufferTarget"></param>
/// <param name="usage"></param>
/// <returns></returns>
private static GLBuffer GenIndependentBuffer(this UnmanagedArrayBase array, IndependentBufferTarget bufferTarget, BufferUsage usage)
{
uint[] ids = new uint[1];
{
glGenBuffers(1, ids);
var target = (uint)bufferTarget;
glBindBuffer(target, ids[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
}
GLBuffer buffer = null;
switch (bufferTarget)
{
case IndependentBufferTarget.AtomicCounterBuffer:
buffer = new AtomicCounterBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelPackBuffer:
buffer = new PixelPackBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelUnpackBuffer:
buffer = new PixelUnpackBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.ShaderStorageBuffer:
buffer = new ShaderStorageBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.TextureBuffer:
buffer = new TextureBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.UniformBuffer:
buffer = new UniformBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.TransformFeedbackBuffer:
buffer = new TransformFeedbackBuffer(ids[0], array.Length, array.ByteLength);
break;
default:
throw new NotDealWithNewEnumItemException(typeof(IndependentBufferTarget));
}
return(buffer);
}
///// <summary>
///// Generates an atomic counter buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static AtomicCounterBuffer GenAtomicCounterBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.AtomicCounterBuffer, usage) as AtomicCounterBuffer;
//}
///// <summary>
///// Generates a pixel pack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelPackBuffer GenPixelPackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelPackBuffer, usage) as PixelPackBuffer;
//}
///// <summary>
///// Generates a pixel unpack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelUnpackBuffer GenPixelUnpackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelUnpackBuffer, usage) as PixelUnpackBuffer;
//}
///// <summary>
///// Generates a shader storage buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static ShaderStorageBuffer GenShaderStorageBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.ShaderStorageBuffer, usage) as ShaderStorageBuffer;
//}
///// <summary>
///// Generates a texture buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static TextureBuffer GenTextureBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.TextureBuffer, usage) as TextureBuffer;
//}
///// <summary>
///// Generates an uniform buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static UniformBuffer GenUniformBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.UniformBuffer, usage) as UniformBuffer;
//}
/// <summary>
/// Generates an independent buffer.
/// </summary>
/// <param name="array"></param>
/// <param name="bufferTarget"></param>
/// <param name="usage"></param>
/// <returns></returns>
private static GLBuffer GenIndependentBuffer(this UnmanagedArrayBase array, IndependentBufferTarget bufferTarget, BufferUsage usage)
{
if (glGenBuffers == null)
{
InitFunctions();
}
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
var target = (uint)bufferTarget;
glBindBuffer(target, buffers[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
GLBuffer buffer = null;
switch (bufferTarget)
{
case IndependentBufferTarget.AtomicCounterBuffer:
buffer = new AtomicCounterBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelPackBuffer:
buffer = new PixelPackBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelUnpackBuffer:
buffer = new PixelUnpackBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.ShaderStorageBuffer:
buffer = new ShaderStorageBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.TextureBuffer:
buffer = new TextureBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.UniformBuffer:
buffer = new UniformBuffer(buffers[0], array.Length, array.ByteLength);
break;
default:
throw new NotImplementedException();
}
return(buffer);
}
/// <summary>
/// Initialize and setup uniform block's value.
/// </summary>
/// <param name="program"></param>
/// <returns></returns>
private UniformBufferPtr Initialize(ShaderProgram program)
{
if (glGetUniformBlockIndex == null)
{
glGetUniformBlockIndex = OpenGL.GetDelegateFor <OpenGL.glGetUniformBlockIndex>();
glGetActiveUniformBlockiv = OpenGL.GetDelegateFor <OpenGL.glGetActiveUniformBlockiv>();
}
uint uboIndex = glGetUniformBlockIndex(program.ProgramId, this.VarName);
var uboSize = new uint[1];
glGetActiveUniformBlockiv(program.ProgramId, uboIndex, OpenGL.GL_UNIFORM_BLOCK_DATA_SIZE, uboSize);
UniformBufferPtr result = null;
using (var buffer = new UniformBuffer <byte>(BufferUsage.StaticDraw, noDataCopyed: false))
{
byte[] bytes = this.value.ToBytes();
buffer.Create(bytes.Length);
unsafe
{
var array = (byte *)buffer.Header.ToPointer();
for (int i = 0; i < bytes.Length; i++)
{
array[i] = bytes[i];
}
}
result = buffer.GetBufferPtr() as UniformBufferPtr;
}
//glBindBufferBase(OpenGL.GL_UNIFORM_BUFFER, uboIndex, result.BufferId);
//glBindBufferBase(OpenGL.GL_UNIFORM_BUFFER, 0, result.BufferId);
//glUniformBlockBinding(program.ProgramId, uboIndex, 0);
result.Binding(program, uboIndex, 0);
result.Unbind();
return(result);
}
///// <summary>
///// Generates an atomic counter buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static AtomicCounterBuffer GenAtomicCounterBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.AtomicCounterBuffer, usage) as AtomicCounterBuffer;
//}
///// <summary>
///// Generates a pixel pack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelPackBuffer GenPixelPackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelPackBuffer, usage) as PixelPackBuffer;
//}
///// <summary>
///// Generates a pixel unpack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelUnpackBuffer GenPixelUnpackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelUnpackBuffer, usage) as PixelUnpackBuffer;
//}
///// <summary>
///// Generates a shader storage buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static ShaderStorageBuffer GenShaderStorageBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.ShaderStorageBuffer, usage) as ShaderStorageBuffer;
//}
///// <summary>
///// Generates a texture buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static TextureBuffer GenTextureBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.TextureBuffer, usage) as TextureBuffer;
//}
///// <summary>
///// Generates an uniform buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static UniformBuffer GenUniformBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.UniformBuffer, usage) as UniformBuffer;
//}
/// <summary>
/// Generates an independent buffer.
/// </summary>
/// <param name="array"></param>
/// <param name="bufferTarget"></param>
/// <param name="usage"></param>
/// <returns></returns>
private static Buffer GenIndependentBuffer(this UnmanagedArrayBase array, IndependentBufferTarget bufferTarget, BufferUsage usage)
{
if (glGenBuffers == null)
{
InitFunctions();
}
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
var target = (uint)bufferTarget;
glBindBuffer(target, buffers[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
Buffer buffer = null;
switch (bufferTarget)
{
case IndependentBufferTarget.AtomicCounterBuffer:
buffer = new AtomicCounterBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelPackBuffer:
buffer = new PixelPackBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelUnpackBuffer:
buffer = new PixelUnpackBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.ShaderStorageBuffer:
buffer = new ShaderStorageBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.TextureBuffer:
buffer = new TextureBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.UniformBuffer:
buffer = new UniformBuffer(buffers[0], array.Length, array.ByteLength);
break;
default:
throw new NotImplementedException();
}
return buffer;
}
/// <summary>
/// Creates a sub-type of <see cref="Buffer"/> object directly in server side(GPU) without initializing its value.
/// </summary>
/// <param name="target"></param>
/// <param name="elementType"></param>
/// <param name="length"></param>
/// <param name="usage"></param>
/// <returns></returns>
public static Buffer Create(IndependentBufferTarget target, Type elementType, int length, BufferUsage usage)
{
if (!elementType.IsValueType) { throw new ArgumentException(string.Format("{0} must be a value type!", elementType)); }
if (glGenBuffers == null) { glGenBuffers = OpenGL.GetDelegateFor<OpenGL.glGenBuffers>(); }
if (glBindBuffer == null) { glBindBuffer = OpenGL.GetDelegateFor<OpenGL.glBindBuffer>(); }
if (glBufferData == null) { glBufferData = OpenGL.GetDelegateFor<OpenGL.glBufferData>(); }
uint bufferTarget = (uint)target;
int byteLength = Marshal.SizeOf(elementType) * length;
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
glBindBuffer(bufferTarget, buffers[0]);
glBufferData(bufferTarget, byteLength, IntPtr.Zero, (uint)usage);
glBindBuffer(bufferTarget, 0);
Buffer buffer;
switch (target)
{
case IndependentBufferTarget.AtomicCounterBuffer:
buffer = new AtomicCounterBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.PixelPackBuffer:
buffer = new PixelPackBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.PixelUnpackBuffer:
buffer = new PixelUnpackBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.ShaderStorageBuffer:
buffer = new ShaderStorageBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.TextureBuffer:
buffer = new TextureBuffer(buffers[0], length, byteLength);
break;
case IndependentBufferTarget.UniformBuffer:
buffer = new UniformBuffer(buffers[0], length, byteLength);
break;
default:
throw new NotImplementedException();
}
return buffer;
}