private IEnumerator ConvertLightmapTexture(Texture2D src, LightmapTextureImporterResult result)
{
var importerShader = GetImporterShader();
if (importerShader == null)
{
result.Result = null;
yield break;
}
var importerMaterial = new Material(importerShader);
var rt = RenderTexture.GetTemporary(src.width, src.height, 0, RenderTextureFormat.DefaultHDR, RenderTextureReadWrite.Linear);
// Decode into Linear RenderTexture
Graphics.Blit(src, rt, importerMaterial);
yield return(null);
// Create Linear Texture2D with settings
var dst = new Texture2D(rt.width, rt.height, TextureFormat.RGBAHalf, mipCount: src.mipmapCount, linear: true);
dst.name = $"{src.name}_decoded";
dst.mipMapBias = src.mipMapBias;
dst.wrapMode = src.wrapMode;
dst.wrapModeU = src.wrapModeU;
dst.wrapModeV = src.wrapModeV;
dst.wrapModeW = src.wrapModeW;
dst.filterMode = src.filterMode;
// Copy to Linear Texture2D
var tmpActive = RenderTexture.active;
RenderTexture.active = rt;
dst.ReadPixels(new Rect(0, 0, rt.width, rt.height), 0, 0);
dst.Apply(updateMipmaps: true, makeNoLongerReadable: true);
RenderTexture.active = tmpActive;
yield return(null);
RenderTexture.ReleaseTemporary(rt);
UnityEngine.Object.DestroyImmediate(importerMaterial);
result.Result = dst;
}
public IEnumerator GetOrConvertColorTextureCoroutine(int colorTextureGltfIndex, LightmapTextureImporterResult result)
{
var textureItem = _textureGetter.Invoke(colorTextureGltfIndex);
if (textureItem.Converts.ContainsKey(ConvertedTexKey))
{
result.Result = textureItem.Converts[ConvertedTexKey];
yield break;
}
yield return(ConvertLightmapTexture(textureItem.Texture, result));
if (result.Result == null)
{
yield break;
}
textureItem.Converts.Add("LightmapLinearTexture", result.Result);
}
