private static void SetTextureImporterPlatformSetting(
TexturePreprocessorConfig config,
TextureImporter textureImporter,
Texture texture,
string textureName,
int textureSize,
TextureImporterFormat format
)
{
Debug.Log($"Setting: {textureSize} | Format: {format} | {textureName}", texture);
config.PlatformsRegexList.ForEach(platformRegexString =>
{
textureImporter.SetPlatformTextureSettings(new TextureImporterPlatformSettings
{
overridden = true,
name = platformRegexString,
maxTextureSize = textureSize,
format = format,
compressionQuality = (int)config.TextureCompressionQuality,
allowsAlphaSplitting = false
});
});
// Be sure to set the platform override for the current platform string, in case the current platform was
// NOT a perfect match to one of the platform regex strings.
textureImporter.SetPlatformTextureSettings(new TextureImporterPlatformSettings
{
overridden = true,
name = EditorUserBuildSettings.activeBuildTarget.ToString(),
maxTextureSize = textureSize,
format = format,
compressionQuality = (int)config.TextureCompressionQuality,
allowsAlphaSplitting = false
});
textureImporter.npotScale = config.NPOTScale;
}
/// <summary>
/// https://docs.unity3d.com/ScriptReference/AssetPostprocessor.OnPreprocessTexture.html
/// </summary>
private void OnPreprocessTexture()
{
var textureImporter = (TextureImporter)assetImporter;
var assetPath = textureImporter.assetPath;
var textureName = AssetPreprocessorUtils.GetAssetNameFromPath(textureImporter.assetPath);
var texture = AssetDatabase.LoadAssetAtPath <Texture2D>(assetPath);
var platformName = EditorUserBuildSettings.activeBuildTarget.ToString();
var configs = AssetPreprocessorUtils.GetScriptableObjectsOfType <TexturePreprocessorConfig>();
if (configs.Count == 0)
{
Debug.Log($"Could not find a {nameof(TexturePreprocessorConfig)} in project.");
return;
}
configs = configs
.Where(conf => conf.ShouldUseConfigForAssetImporter(assetImporter))
.ToList();
configs.Sort((config1, config2) => config1.ConfigSortOrder.CompareTo(config2.ConfigSortOrder));
TexturePreprocessorConfig config = null;
for (var i = 0; i < configs.Count; i++)
{
var configToTest = configs[i];
if (!AssetPreprocessorUtils.DoesRegexStringListMatchString(configToTest.PlatformsRegexList, platformName))
{
continue;
}
// Found matching config.
config = configToTest;
break;
}
// If could not find a matching config, don't process the texture.
if (config == null)
{
return;
}
var currentPlatform = EditorUserBuildSettings.activeBuildTarget.ToString();
var currentPlatformSettings = textureImporter.GetPlatformTextureSettings(currentPlatform);
var hasAlpha = textureImporter.DoesSourceTextureHaveAlpha();
var nativeTextureSize = GetOriginalTextureSize(textureImporter);
var nativeSize = Mathf.NextPowerOfTwo(Mathf.Max(nativeTextureSize.width, nativeTextureSize.height));
var currentFormat = currentPlatformSettings.format.ToString();
// Handle when native size for texture is too small. Happens for baked light maps and reflection maps.
// Need to reimport asset once to get correct native texture size.
if (nativeSize <= 4)
{
AssetDatabase.Refresh();
return;
}
Debug.Log($"Processing: {textureName} | Native size: {nativeSize} | Current format: {currentFormat}", texture);
Debug.Log($"Using: {config.name}", config);
// If already contains correct texture format, skip adjusting import settings.
var matchingSkipRegex = config.SkipIfCurrentTextureFormatMatchesRegexList.Find(regexString => new Regex(regexString).IsMatch(currentFormat));
var alreadyContainsFormat = matchingSkipRegex != null;
if (!config.ForcePreprocess && alreadyContainsFormat)
{
Debug.Log($"Skipping preprocess. Current format matching skip regex: '{matchingSkipRegex}'", texture);
return;
}
if (config.EnableReadWrite && !textureImporter.isReadable)
{
Debug.Log("Enabling Read/Write.", texture);
textureImporter.isReadable = true;
}
var maxTextureSize = config.MaxTextureSize;
var multipliedNativeRes = Mathf.RoundToInt(nativeSize * config.NativeTextureSizeMultiplier);
var textureSize = Mathf.Min(multipliedNativeRes, maxTextureSize);
var format = hasAlpha ? config.RGBAFormat : config.RGBFormat;
if (config.ForceLinear)
{
textureImporter.sRGBTexture = false;
}
if (config.ForceFilterMode)
{
textureImporter.anisoLevel = config.AnisoLevel;
textureImporter.filterMode = config.FilterMode;
}
textureImporter.mipmapEnabled = config.GenerateMipMaps;
textureImporter.streamingMipmaps = config.EnableMipMapStreaming;
SetTextureImporterPlatformSetting(config, textureImporter, texture, textureName, textureSize, format);
}