private unsafe void Upload3DLut(Lut3DHeader header, byte[] lutBuffer)
{
int inputBitsR = header.InputBitDepth[2];
int inputBitsG = header.InputBitDepth[1];
int inputBitsB = header.InputBitDepth[0];
int rSize = 1 << inputBitsR;
int gSize = 1 << inputBitsG;
int bSize = 1 << inputBitsB;
const int channelCount = 4;
var data = new ushort[bSize, gSize, rSize *channelCount];
fixed(void *lutByte = lutBuffer)
{
var lut = (ushort *)lutByte;
for (int b = 0; b < bSize; b++)
{
for (int g = 0; g < gSize; g++)
{
for (int r = 0; r < rSize; r++)
{
var lutOffset = ((r << (inputBitsG + inputBitsB)) + (g << inputBitsB) + b) * 3;
var max = (1 << header.OutputBitDepth) - 1;
var n = ushort.MaxValue / max;
data[b, g, r *channelCount + 0] = (ushort)(lut[lutOffset + 2] * n);
data[b, g, r *channelCount + 1] = (ushort)(lut[lutOffset + 1] * n);
data[b, g, r *channelCount + 2] = (ushort)(lut[lutOffset + 0] * n);
data[b, g, r *channelCount + 3] = ushort.MaxValue;
}
}
}
}
var texture = Renderer.CreateTexture3D(bSize, gSize, rSize, TextureFormat.Unorm16);
Renderer.UpdateTexture3D(texture, data);
m_Texture3D = texture.GetManaged();
m_CurrentFileName = FileName;
}
private unsafe void Upload3DLut(Lut3DHeader header, byte[] lutBuffer)
{
int inputBitsR = header.InputBitDepth[2];
int inputBitsG = header.InputBitDepth[1];
int inputBitsB = header.InputBitDepth[0];
int rSize = 1 << inputBitsR;
int gSize = 1 << inputBitsG;
int bSize = 1 << inputBitsB;
const int channelCount = 4;
var data = new Half[bSize, gSize, rSize *channelCount];
fixed(void *lutByte = lutBuffer)
{
var lut = (ushort *)lutByte;
for (int b = 0; b < bSize; b++)
{
for (int g = 0; g < gSize; g++)
{
for (int r = 0; r < rSize; r++)
{
var lutOffset = ((r << (inputBitsG + inputBitsB)) + (g << inputBitsB) + b) * 3;
var max = (float)((1 << header.OutputBitDepth) - 1);
data[b, g, r *channelCount + 0] = lut[lutOffset + 2] / max;
data[b, g, r *channelCount + 1] = lut[lutOffset + 1] / max;
data[b, g, r *channelCount + 2] = lut[lutOffset + 0] / max;
data[b, g, r *channelCount + 3] = 1;
}
}
}
}
m_Texture3D = Renderer.CreateTexture3D(bSize, gSize, rSize);
Renderer.UpdateTexture3D(m_Texture3D, data);
}
