private void TransformAOTexture(ShaderArguments arguments, string baseColorName)
{
if (arguments.Occlusion == null)
{
return;
}
var sourceFileTimestampUtc = ExportUtils.GetLastWriteTimeUtc(arguments.Occlusion);
var assetGuid = arguments.Occlusion.GetKey();
if (_engine.IsUpToDate(assetGuid, baseColorName, sourceFileTimestampUtc))
{
return;
}
var tmpMaterial = new Material(Shader.Find("Hidden/UnityToCustomEngineExporter/Urho3D/PremultiplyOcclusionStrength"));
try
{
var mainTexture = arguments.Occlusion;
tmpMaterial.SetTexture("_MainTex", mainTexture);
tmpMaterial.SetFloat("_OcclusionStrength", arguments.OcclusionStrength);
new TextureProcessor().ProcessAndSaveTexture(mainTexture, tmpMaterial,
_engine.GetTargetFilePath(baseColorName));
WriteOptions(assetGuid, baseColorName, sourceFileTimestampUtc,
ExportUtils.GetTextureOptions(mainTexture).WithSRGB(true));
}
finally
{
Object.DestroyImmediate(tmpMaterial);
}
}
private void CopyTextureAndSaveAs(Texture texture)
{
var outputAssetName = EvaluateTextureName(texture);
var sourceFileTimestampUtc = ExportUtils.GetLastWriteTimeUtc(texture);
var assetGuid = texture.GetKey();
if (_engine.IsUpToDate(assetGuid, outputAssetName, sourceFileTimestampUtc))
{
return;
}
var tImporter = AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(texture)) as TextureImporter;
var texType = tImporter?.textureType ?? TextureImporterType.Default;
var textureOptions = ExportUtils.GetTextureOptions(texture);
switch (texType)
{
case TextureImporterType.NormalMap:
new TextureProcessor().ProcessAndSaveTexture(texture, "Hidden/UnityToCustomEngineExporter/Urho3D/DecodeNormalMap", _engine.GetTargetFilePath(outputAssetName), true);
break;
default:
new TextureProcessor().ProcessAndSaveTexture(texture, "Hidden/UnityToCustomEngineExporter/Urho3D/Copy", _engine.GetTargetFilePath(outputAssetName), textureOptions.textureImporterFormat != TextureImporterFormat.DXT1);
WriteOptions(assetGuid, outputAssetName, sourceFileTimestampUtc, textureOptions.WithSRGB(true));
break;
}
}
private void CopyTexture(Texture texture)
{
var relPath = ExportUtils.GetRelPathFromAsset(_engine.Options.Subfolder, texture);
var newName = EvaluateTextureName(texture);
if (relPath != newName)
{
CopyTextureAndSaveAs(texture);
}
else
{
_engine.TryCopyFile(AssetDatabase.GetAssetPath(texture), newName);
WriteOptions(texture.GetKey(), newName, ExportUtils.GetLastWriteTimeUtc(texture),
ExportUtils.GetTextureOptions(texture));
}
}
private void TransformSpecularGlossiness(SpecularGlossinessShaderArguments arguments, string baseColorName)
{
var sourceFileTimestampUtc = ExportUtils.GetLastWriteTimeUtc(arguments.Diffuse,
arguments.PBRSpecular.Texture, arguments.Smoothness.Texture);
var assetGuid =
(arguments.Diffuse ?? arguments.PBRSpecular.Texture ?? arguments.Smoothness.Texture).GetKey();
if (_engine.IsUpToDate(assetGuid, baseColorName, sourceFileTimestampUtc))
{
return;
}
var tmpMaterial =
new Material(
Shader.Find("Hidden/UnityToCustomEngineExporter/Urho3D/ConvertSpecularToMetallicRoughness"));
Texture mainTexture = null;
Texture specularTexture = null;
Texture smoothnessTexture = null;
try
{
mainTexture = EnsureTexture(new TextureOrColor(arguments.Diffuse, arguments.DiffuseColor));
specularTexture = EnsureTexture(arguments.PBRSpecular);
smoothnessTexture = EnsureTexture(arguments.Smoothness);
var(width, height) = MaxTexutreSize(mainTexture, specularTexture, smoothnessTexture);
tmpMaterial.SetTexture("_MainTex", mainTexture);
tmpMaterial.SetTexture("_SpecGlossMap", specularTexture);
tmpMaterial.SetFloat("_SmoothnessScale",
arguments.GlossinessTextureScale *
(arguments.Smoothness.Texture != null ? 1.0f : arguments.Glossiness));
tmpMaterial.SetTexture("_Smoothness", smoothnessTexture);
new TextureProcessor().ProcessAndSaveTexture(mainTexture, width, height, tmpMaterial,
_engine.GetTargetFilePath(baseColorName));
WriteOptions(assetGuid, baseColorName, sourceFileTimestampUtc,
(ExportUtils.GetTextureOptions(mainTexture) ?? ExportUtils.GetTextureOptions(specularTexture) ??
ExportUtils.GetTextureOptions(smoothnessTexture)).WithSRGB(false));
}
finally
{
Object.DestroyImmediate(tmpMaterial);
DestroyTmpTexture(arguments.Diffuse, mainTexture);
DestroyTmpTexture(arguments.PBRSpecular, specularTexture);
DestroyTmpTexture(arguments.Smoothness, smoothnessTexture);
}
}
private void TransformNormal(Texture bump, float bumpScale, string baseColorName)
{
if (bump == null)
{
return;
}
if (bumpScale >= 0.999f)
{
CopyTexture(bump);
return;
}
var sourceFileTimestampUtc = ExportUtils.GetLastWriteTimeUtc(bump);
var assetGuid = bump.GetKey();
if (_engine.IsUpToDate(assetGuid, baseColorName, sourceFileTimestampUtc))
{
return;
}
var tmpMaterial = new Material(Shader.Find("Hidden/UnityToCustomEngineExporter/Urho3D/DecodeNormalMap"));
try
{
var mainTexture = bump;
tmpMaterial.SetTexture("_MainTex", mainTexture);
tmpMaterial.SetFloat("_BumpScale", bumpScale);
new TextureProcessor().ProcessAndSaveTexture(mainTexture, tmpMaterial, _engine.GetTargetFilePath(baseColorName));
WriteOptions(assetGuid, baseColorName, sourceFileTimestampUtc, ExportUtils.GetTextureOptions(mainTexture).WithSRGB(false));
}
finally
{
Object.DestroyImmediate(tmpMaterial);
}
}