/// <summary>
/// Define the fake GPU buffer (when GL_ARB_vertex_array_object is not supported) using the current client buffer.
/// </summary>
protected virtual void UploadClientBuffer()
{
if (_MemoryBufferAutoDispose == false)
{
// Note: client buffer is expected to be allocated and modificable; even while the GPU is rendering
// using the simulated GPU buffer. We need to copy: in this way it is implemented the double buffer
// mechanism of the GL_ARB_vertex_buffer_object extension
// Allocate a new GPU buffer
_GpuBuffer = new AlignedMemoryBuffer(ClientBufferSize, MinimumBufferAlignment);
// Copy from client buffer
Memory.MemoryCopy(_GpuBuffer.AlignedBuffer, ClientBufferAddress, ClientBufferSize);
}
else
{
// Note: since client buffer need to be disposed (ending set to null), we do not copy
// client buffer to GPU buffer; instead, switch references and do not dispose the client buffer
// Allocate GPU buffer
_GpuBuffer = _ClientBuffer;
// Do not need disposition (not really sure, but apart ClientBufferAddress, no reference of _ClientBuffer
// should be out of here
_ClientBuffer = null;
}
}
/// <summary>
/// Allocate a new client buffer for this BufferObject.
/// </summary>
/// <param name="size">
/// A <see cref="UInt32"/> that determine the size of the buffer object client buffer, in bytes.
/// </param>
protected virtual void AllocateClientBuffer(uint size)
{
// Discard previous buffer
ReleaseClientBuffer();
// Allocate memory, if required
_ClientBuffer = new AlignedMemoryBuffer(size, MinimumBufferAlignment);
}
/// <summary>
/// Copy data from another AlignedMemoryBuffer.
/// </summary>
/// <param name="otherMemoryBuffer">
/// A <see cref="AlignedMemoryBuffer"/> which has allocated the data to be copied.
/// </param>
/// <param name="otherOffset">
/// A <see cref="UInt64"/> which specify an additional offset (in bytes) to apply to <paramref name="otherMemoryBuffer"/>.
/// </param>
/// <param name="thisOffset">
/// A <see cref="UInt64"/> which specify an additional offset (in bytes) to apply to this AlignedMemoryBuffer.
/// </param>
/// <param name="bytesCopied">
/// A <see cref="UInt64"/> which specify the number of bytes to be copied.
/// </param>
public void CopyBuffer(AlignedMemoryBuffer otherMemoryBuffer, ulong otherOffset, ulong thisOffset, ulong bytesCopied)
{
if (IsDisposed)
{
throw new ObjectDisposedException("AlignedMemoryBuffer");
}
if (otherMemoryBuffer == null)
{
throw new ArgumentNullException("otherMemoryBuffer");
}
if (otherMemoryBuffer._UnmanagedBuffer == IntPtr.Zero)
{
throw new ArgumentException("disposed", "otherMemoryBuffer");
}
if (thisOffset + bytesCopied >= otherMemoryBuffer.Size - otherOffset)
{
throw new InvalidOperationException("copying out of bounds");
}
if (bytesCopied > 0)
{
IntPtr src = new IntPtr(otherMemoryBuffer.AlignedBuffer.ToInt64() + (long)otherOffset);
IntPtr dst = new IntPtr(AlignedBuffer.ToInt64() + (long)thisOffset);
Memory.MemoryCopy(dst, src, bytesCopied);
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting managed/unmanaged resources.
/// </summary>
/// <param name="disposing">
/// </param>
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (_PixelBuffers != null)
{
// Release the buffer buffer
_PixelBuffers.Dispose();
_PixelBuffers = null;
}
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting managed/unmanaged resources.
/// </summary>
/// <exception cref="InvalidOperationException">
/// Exception thrown in the case <see cref="GraphicsResource.RefCount"/> is greater than zero. This means that the method is trying to dispose
/// an object that is actually referenced by something else.
/// </exception>
protected override void Dispose(bool disposing)
{
// Base implementation
base.Dispose(disposing);
if (disposing == true)
{
// Simulated GPU buffer is disposed at disposition
if (_GpuBuffer != null)
{
_GpuBuffer.Dispose();
_GpuBuffer = null;
// Reset GPU buffer size
_GpuBufferSize = 0;
}
// Release client buffer
ReleaseClientBuffer();
}
}
/// <summary>
/// Actually create this BufferObject resources.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="ctx"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="ctx"/> is not current on the calling thread.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Exception thrown if this BufferObject has not client memory allocated and the hint is different from
/// <see cref="BufferObjectHint.StaticCpuDraw"/> or <see cref="BufferObjectHint.DynamicCpuDraw"/>.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Exception thrown if this BufferObject is currently mapped.
/// </exception>
protected override void CreateObject(GraphicsContext ctx)
{
CheckCurrentContext(ctx);
if ((ClientBufferAddress == IntPtr.Zero) && ((Hint != BufferObjectHint.StaticCpuDraw) && (Hint != BufferObjectHint.DynamicCpuDraw)))
{
throw new InvalidOperationException("no client buffer");
}
// Determine the client buffer size
uint clientBufferSize = _ClientBufferSize;
if (ClientBufferAddress != IntPtr.Zero)
{
clientBufferSize = ClientBufferSize;
}
Debug.Assert(clientBufferSize > 0);
// Buffer must be bound
Bind(ctx);
if (ctx.Caps.GlExtensions.VertexBufferObject_ARB)
{
if (IsMapped)
{
throw new InvalidOperationException("mapped");
}
// Define buffer object (type, size and hints)
Gl.BufferData((int)BufferType, clientBufferSize, null, (int)Hint);
// Store GPU buffer size
_GpuBufferSize = clientBufferSize;
// Define buffer object contents
if (ClientBufferAddress != IntPtr.Zero)
{
// Provide buffer contents
Gl.BufferSubData(BufferType, IntPtr.Zero, _GpuBufferSize, ClientBufferAddress);
// Release memory, if it is not required anymore
if (_MemoryBufferAutoDispose)
{
ReleaseClientBuffer();
}
}
}
else
{
// Discard previous GPU buffer, if any
if (_GpuBuffer != null)
{
_GpuBuffer.Dispose();
}
if (ClientBufferAddress == IntPtr.Zero)
{
// Note: GPU buffer size specified by _ClientBufferSize
Debug.Assert(_ClientBufferSize > 0);
// Allocate simulated GPU buffer
_GpuBuffer = new AlignedMemoryBuffer(_ClientBufferSize, MinimumBufferAlignment);
}
else
{
// Let a virtual implementation decide how pass information from the client buffer and the "GPU" buffer
UploadClientBuffer();
}
// Store GPU buffer size
_GpuBufferSize = _GpuBuffer.Size;
}
// Reset requested client buffer size
_ClientBufferSize = 0;
}
/// <summary>
/// Allocate pixel data for this Image.
/// </summary>
/// <param name="format">
/// A <see cref="PixelLayout"/> indicating the image pixel format.
/// </param>
/// <param name="w">
/// A <see cref="Int32"/> indicating the image width, in pixels.
/// </param>
/// <param name="h">
/// A <see cref="Int32"/> indicating the image height, in pixels.
/// </param>
public void Create(PixelLayout format, uint w, uint h)
{
PixelLayoutInfo formatInfo = Pixel.GetPixelFormat(format);
switch (format)
{
// Single plane formats
case PixelLayout.GRAY8:
case PixelLayout.GRAY16:
case PixelLayout.GRAYF:
case PixelLayout.GRAYHF:
case PixelLayout.GRAYAF:
case PixelLayout.RGB8:
case PixelLayout.RGB15:
case PixelLayout.RGB16:
case PixelLayout.RGB24:
case PixelLayout.RGB48:
case PixelLayout.RGBF:
case PixelLayout.RGBHF:
case PixelLayout.RGBD:
case PixelLayout.SRGB24:
case PixelLayout.SBGR24:
case PixelLayout.RGB30A2:
case PixelLayout.RGBA32:
case PixelLayout.RGBA64:
case PixelLayout.RGBAF:
case PixelLayout.RGBAHF:
case PixelLayout.BGR8:
case PixelLayout.BGR15:
case PixelLayout.BGR16:
case PixelLayout.BGR24:
case PixelLayout.BGR48:
case PixelLayout.BGRF:
case PixelLayout.BGRHF:
case PixelLayout.BGR30A2:
case PixelLayout.BGRA32:
case PixelLayout.BGRA64:
case PixelLayout.BGRAF:
case PixelLayout.BGRAHF:
case PixelLayout.CMY24:
case PixelLayout.CMYK32:
case PixelLayout.CMYK64:
case PixelLayout.CMYKA40:
case PixelLayout.Depth16:
case PixelLayout.Depth24:
case PixelLayout.Depth32:
case PixelLayout.DepthF:
case PixelLayout.Depth24Stencil8:
case PixelLayout.Depth32FStencil8:
case PixelLayout.Integer1:
case PixelLayout.Integer2:
case PixelLayout.Integer3:
case PixelLayout.Integer4:
case PixelLayout.UInteger1:
case PixelLayout.UInteger2:
case PixelLayout.UInteger3:
case PixelLayout.UInteger4:
_PixelBuffers = new AlignedMemoryBuffer(w * h * formatInfo.PixelBytes, 16);
// Define planes
_PixelPlanes = new IntPtr[] { _PixelBuffers.AlignedBuffer };
break;
case PixelLayout.YUYV:
case PixelLayout.YYUV:
case PixelLayout.YVYU:
case PixelLayout.UYVY:
case PixelLayout.VYUY:
if (((w % 2) != 0) || ((h % 2) != 0))
{
throw new InvalidOperationException(String.Format("invalid image extents for pixel format {0}", format));
}
// Define planes
_PixelBuffers = new AlignedMemoryBuffer(w * h * formatInfo.PixelBytes, 16);
_PixelPlanes = new IntPtr[] { _PixelBuffers.AlignedBuffer };
break;
case PixelLayout.YVU410:
case PixelLayout.YUV410:
if (((w % 16) != 0) || ((h % 16) != 0))
{
throw new InvalidOperationException(String.Format("invalid image extents for pixel format {0}", format));
}
_PixelBuffers = new AlignedMemoryBuffer(w * h + (w * h / 16) * 2, 16);
// Define planes
_PixelPlanes = new IntPtr[3];
_PixelPlanes[0] = _PixelBuffers.AlignedBuffer;
_PixelPlanes[1] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h);
_PixelPlanes[2] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h + (w * h / 16));
break;
case PixelLayout.YVU420:
case PixelLayout.YUV420:
if (((w % 4) != 0) || ((h % 4) != 0))
{
throw new InvalidOperationException(String.Format("invalid image extents for pixel format {0}", format));
}
_PixelBuffers = new AlignedMemoryBuffer(w * h + (w * h / 4), 16);
// Define planes
_PixelPlanes = new IntPtr[3];
_PixelPlanes[0] = _PixelBuffers.AlignedBuffer;
_PixelPlanes[1] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h);
_PixelPlanes[2] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h + (w * h / 4));
break;
case PixelLayout.YUV422P:
if ((w % 2) != 0)
{
throw new InvalidOperationException(String.Format("invalid image extents for pixel format {0}", format));
}
_PixelBuffers = new AlignedMemoryBuffer(w * h + (w * h / 2), 16);
// Define planes
_PixelPlanes = new IntPtr[3];
_PixelPlanes[0] = _PixelBuffers.AlignedBuffer;
_PixelPlanes[1] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h);
_PixelPlanes[2] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h + (w * h / 2));
break;
case PixelLayout.YUV411P:
if ((w % 4) != 0)
{
throw new InvalidOperationException(String.Format("invalid image extents for pixel format {0}", format));
}
_PixelBuffers = new AlignedMemoryBuffer(w * h + (w * h / 4), 16);
// Define planes
_PixelPlanes = new IntPtr[3];
_PixelPlanes[0] = _PixelBuffers.AlignedBuffer;
_PixelPlanes[1] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h);
_PixelPlanes[2] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h + (w * h / 4));
break;
case PixelLayout.Y41P:
if ((w % 8) != 0)
{
throw new InvalidOperationException(String.Format("invalid image extents for pixel format {0}", format));
}
_PixelBuffers = new AlignedMemoryBuffer(w * h * 12 / 8, 16);
// Define planes
_PixelPlanes = new IntPtr[3];
_PixelPlanes[0] = _PixelBuffers.AlignedBuffer;
_PixelPlanes[1] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h);
_PixelPlanes[2] = new IntPtr(_PixelBuffers.AlignedBuffer.ToInt64() + w * h + (w * h / 4));
break;
default:
throw new NotSupportedException(String.Format("pixel format {0} is not supported", format));
}
// Set image information
_ImageInfo.PixelType = formatInfo.DataFormat;
_ImageInfo.Width = w;
_ImageInfo.Height = h;
// Store pixel format
_PixelFormat = formatInfo;
Debug.Assert(_PixelPlanes != null);
Debug.Assert(_PixelPlanes.Length != 0);
Debug.Assert(Array.TrueForAll(_PixelPlanes, delegate(IntPtr pixelPlane) { return(pixelPlane != IntPtr.Zero); }));
}
/// <summary>
/// Copy data from another AlignedMemoryBuffer.
/// </summary>
/// <param name="otherMemoryBuffer">
/// A <see cref="AlignedMemoryBuffer"/> which has allocated the data to be copied.
/// </param>
/// <param name="otherOffset">
/// A <see cref="UInt64"/> which specify an additional offset (in bytes) to apply to <paramref name="otherMemoryBuffer"/>.
/// </param>
/// <param name="thisOffset">
/// A <see cref="UInt64"/> which specify an additional offset (in bytes) to apply to this AlignedMemoryBuffer.
/// </param>
/// <param name="bytesCopied">
/// A <see cref="UInt64"/> which specify the number of bytes to be copied.
/// </param>
public void CopyBuffer(AlignedMemoryBuffer otherMemoryBuffer, ulong otherOffset, ulong thisOffset, ulong bytesCopied)
{
if (IsDisposed)
throw new ObjectDisposedException("AlignedMemoryBuffer");
if (otherMemoryBuffer == null)
throw new ArgumentNullException("otherMemoryBuffer");
if (otherMemoryBuffer._UnmanagedBuffer == IntPtr.Zero)
throw new ArgumentException("disposed", "otherMemoryBuffer");
if (thisOffset + bytesCopied >= otherMemoryBuffer.Size - otherOffset)
throw new InvalidOperationException("copying out of bounds");
if (bytesCopied > 0) {
IntPtr src = new IntPtr(otherMemoryBuffer.AlignedBuffer.ToInt64() + (long)otherOffset);
IntPtr dst = new IntPtr(AlignedBuffer.ToInt64() + (long)thisOffset);
Memory.MemoryCopy(dst, src, bytesCopied);
}
}
