32bit data for Float texture on dynamic plugin

manuel · August 18, 2016, 8:52pm

Hey, we have a allocated a float texture inside a dynamic plugin, but we cant fill with 32bit float data. “UInt32Utils” is only for Int, there’s any option for float data ?

tonfilm · August 19, 2016, 6:35pm

these are helper methods to pack bytes into a UInt type. we have not implemented that for floats. you have to code it on your own… but the sources may help you:

github.com

vvvv/vvvv-sdk/blob/develop/vvvv45/src/core/Utils3rdParty/SlimDX/UInt32Utils.cs

using System;

namespace VVVV.Utils.SlimDX
{
	/// <summary>
	/// Low level utils to use uint as 32bit color
	/// </summary>
	public static class UInt32Utils
	{
		/// <summary>
		/// Converts a color stored as uint to a color of type int.
		/// </summary>
		/// <param name="col">The color to convert.</param>
		/// <returns>The converted color as int.</returns>
		public static int BitwiseToInt(this uint col)
		{
			unchecked
			{
				return (int)col;
			}

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github.com

vvvv/vvvv-sdk/blob/develop/vvvv45/src/core/Utils3rdParty/SlimDX/TextureUtils.cs

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;

using SlimDX.Direct3D9;

namespace VVVV.Utils.SlimDX
{
	/// <summary>
	/// Method delegate for pixelshader like texture fill functions.
	/// </summary>
	public unsafe delegate void TextureFillFunction(uint[] oldData, uint* data, int row, int col, int width, int height);
	
	/// <summary>
	/// Method delegate for pixelshader like texture fill functions carrying user defined metadata in its arguments.
	/// </summary>
	public unsafe delegate void TextureFillFunction<TMetadata>(uint[] oldData, uint* data, int row, int col, int width, int height, TMetadata metadata);

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also if you google “SlimDX float texture” or so you will find examples…

manuel · August 26, 2016, 8:43am

Thanks
finally we just output the raw data and read it with dynamicTexture DX11

In DX9 you can only write 8bit textures

woei · August 30, 2016, 11:50pm

there are no helpermethods ready but you can do it yourself easily in dx9:

Texture CreateF32Texture(Device device, int width, int height)
{
  var pool = Pool.Managed;
  var usage = Usage.None;
  if (device is DeviceEx)
  {
    pool = Pool.Default;
    usage = Usage.Dynamic;
  }
  return new Texture(device, width, height, 1, usage, Format.A32B32G32R32F, pool);
}