private static void ComputeCompressionScalers(ProceduralTexture2D target)
{
target.compressionScalers = Vector4.one;
if (target.compressionQuality != ProceduralTexture2D.CompressionLevel.None && target.type != ProceduralTexture2D.TextureType.Other)
{
target.compressionScalers.x = 1.0f / target.colorSpaceVector1.magnitude;
target.compressionScalers.y = 1.0f / target.colorSpaceVector2.magnitude;
target.compressionScalers.z = 1.0f / target.colorSpaceVector3.magnitude;
}
}
private static void PreprocessData(ProceduralTexture2D target)
{
if (target.input == null)
{
return;
}
// Init progress bar
stepCounter = 0;
totalSteps = (target.type != ProceduralTexture2D.TextureType.Other ? 4 : 0) + (target.type != ProceduralTexture2D.TextureType.Other ? 9 : 12) + 1;
EditorUtility.DisplayProgressBar("Pre-processing Procedural Texture Data", target.name, (float)stepCounter / (totalSteps - 1));
// Section 1.4 Improvement: using a decorrelated color space for Color RGB and Normal XYZ textures
TextureFormat inputFormat = TextureFormat.RGB24;
TextureData albedoData = TextureToTextureData(target.input, ref inputFormat);
TextureData decorrelated = new TextureData(albedoData);
if (target.type != ProceduralTexture2D.TextureType.Other)
{
DecorrelateColorSpace(ref albedoData, ref decorrelated, ref target.colorSpaceVector1, ref target.colorSpaceVector2, ref target.colorSpaceVector3, ref target.colorSpaceOrigin, target.name);
}
ComputeCompressionScalers(target);
// Perform precomputations
TextureData Tinput = new TextureData(decorrelated.width, decorrelated.height);
TextureData invT = new TextureData(LUT_WIDTH, (int)(Mathf.Log((float)Tinput.width) / Mathf.Log(2.0f))); // Height = Number of prefiltered LUT levels
List <int> channelsToProcess = new List <int> {
0, 1, 2
};
if ((target.type == ProceduralTexture2D.TextureType.Color && target.includeAlpha == true) || target.type == ProceduralTexture2D.TextureType.Other)
{
channelsToProcess.Add(3);
}
Precomputations(ref decorrelated, channelsToProcess, ref Tinput, ref invT, target.name);
RescaleForCompression(target, ref Tinput);
EditorUtility.DisplayProgressBar("Pre-processing Procedural Texture Data", target.name, (float)stepCounter++ / (totalSteps - 1));
// Serialize precomputed data and setup material
FinalizePrecomputedTextures(ref inputFormat, target, ref Tinput, ref invT);
target.memoryUsageBytes = target.Tinput.GetRawTextureData().Length + target.invT.GetRawTextureData().Length;
EditorUtility.ClearProgressBar();
// Update current applied settings
target.currentInput = target.input;
target.currentIncludeAlpha = target.includeAlpha;
target.currentGenerateMipMaps = target.generateMipMaps;
target.currentFilterMode = target.filterMode;
target.currentAnisoLevel = target.anisoLevel;
target.currentCompressionQuality = target.compressionQuality;
}
static void FinalizePrecomputedTextures(ref TextureFormat inputFormat, ProceduralTexture2D target, ref TextureData Tinput, ref TextureData invT)
{
// Serialize precomputed data as new subasset texture. Reuse existing texture if possible to avoid breaking texture references in shadergraph.
if (target.Tinput == null)
{
target.Tinput = new Texture2D(Tinput.width, Tinput.height, inputFormat, target.generateMipMaps, true);
AssetDatabase.AddObjectToAsset(target.Tinput, target);
}
target.Tinput.Resize(Tinput.width, Tinput.height, inputFormat, target.generateMipMaps);
target.Tinput.name = target.input.name + "_T";
target.Tinput.SetPixels(Tinput.data);
target.Tinput.wrapMode = TextureWrapMode.Repeat;
target.Tinput.filterMode = target.filterMode;
target.Tinput.anisoLevel = target.anisoLevel;
target.Tinput.Apply();
if (target.compressionQuality != ProceduralTexture2D.CompressionLevel.None)
{
if (target.compressionQuality == ProceduralTexture2D.CompressionLevel.HighQuality)
{
EditorUtility.CompressTexture(target.Tinput, TextureFormat.BC7, (int)target.compressionQuality);
}
else if (inputFormat == TextureFormat.RGBA32)
{
EditorUtility.CompressTexture(target.Tinput, TextureFormat.DXT5, (int)target.compressionQuality);
}
else
{
EditorUtility.CompressTexture(target.Tinput, TextureFormat.DXT1, (int)target.compressionQuality);
}
}
target.Tinput.Apply();
if (target.invT == null)
{
target.invT = new Texture2D(invT.width, invT.height, inputFormat, false, true);
AssetDatabase.AddObjectToAsset(target.invT, target);
}
target.invT.Resize(invT.width, invT.height, inputFormat, false);
target.invT.name = target.input.name + "_invT";
target.invT.wrapMode = TextureWrapMode.Clamp;
target.invT.filterMode = FilterMode.Bilinear;
target.invT.SetPixels(invT.data);
target.invT.Apply();
// Update asset database
AssetDatabase.SaveAssets();
AssetDatabase.Refresh();
}
private bool UnappliedSettingChanges(ProceduralTexture2D target)
{
if (target.currentInput != target.input ||
target.currentIncludeAlpha != target.includeAlpha ||
target.currentGenerateMipMaps != target.generateMipMaps ||
target.currentFilterMode != target.filterMode ||
target.currentAnisoLevel != target.anisoLevel ||
target.currentCompressionQuality != target.compressionQuality)
{
return(true);
}
else
{
return(false);
}
}
private void CopyInputTextureImportType(ProceduralTexture2D target)
{
string path = AssetDatabase.GetAssetPath(target.input);
TextureImporter inputImporter = (TextureImporter)TextureImporter.GetAtPath(path);
switch (inputImporter.textureType)
{
case TextureImporterType.NormalMap:
target.type = ProceduralTexture2D.TextureType.Normal;
break;
default:
target.type = ProceduralTexture2D.TextureType.Color;
break;
}
}
private static void RescaleForCompression(ProceduralTexture2D target, ref TextureData Tinput)
{
int channelCount = (target.type == ProceduralTexture2D.TextureType.Color && target.includeAlpha == true) || target.type == ProceduralTexture2D.TextureType.Other ?
4 : 3;
// If we use DXT compression
// we need to rescale the Gaussian channels (see Section 1.6)
if (target.compressionQuality != ProceduralTexture2D.CompressionLevel.None && target.type != ProceduralTexture2D.TextureType.Other)
{
for (int y = 0; y < Tinput.height; y++)
{
for (int x = 0; x < Tinput.width; x++)
{
for (int i = 0; i < channelCount; i++)
{
float v = Tinput.GetColor(x, y)[i];
v = (v - 0.5f) / target.compressionScalers[i] + 0.5f;
Tinput.GetColorRef(x, y)[i] = v;
}
}
}
}
}
