private IEnumerator UpdateCubemapFace(glTFCubemapFaceTextureSet src, Cubemap dst, int mipmap, CoroutineSuccessResult result)
{
var positiveX = _textureGetter(src.cubemapPositiveX.index).Texture;
var negativeX = _textureGetter(src.cubemapNegativeX.index).Texture;
var positiveY = _textureGetter(src.cubemapPositiveY.index).Texture;
var negativeY = _textureGetter(src.cubemapNegativeY.index).Texture;
var positiveZ = _textureGetter(src.cubemapPositiveZ.index).Texture;
var negativeZ = _textureGetter(src.cubemapNegativeZ.index).Texture;
result.Result = false;
var faceResult = new CoroutineSuccessResult();
yield return(RenderCubemapFaceTextureCoroutine(positiveX, dst, GltfCubemapFace.PositiveX.ConvertToUnityCubemapFace(), mipmap, faceResult));
if (!faceResult.Result)
{
yield break;
}
yield return(RenderCubemapFaceTextureCoroutine(negativeX, dst, GltfCubemapFace.NegativeX.ConvertToUnityCubemapFace(), mipmap, faceResult));
if (!faceResult.Result)
{
yield break;
}
yield return(RenderCubemapFaceTextureCoroutine(positiveY, dst, GltfCubemapFace.PositiveY.ConvertToUnityCubemapFace(), mipmap, faceResult));
if (!faceResult.Result)
{
yield break;
}
yield return(RenderCubemapFaceTextureCoroutine(negativeY, dst, GltfCubemapFace.NegativeY.ConvertToUnityCubemapFace(), mipmap, faceResult));
if (!faceResult.Result)
{
yield break;
}
yield return(RenderCubemapFaceTextureCoroutine(positiveZ, dst, GltfCubemapFace.PositiveZ.ConvertToUnityCubemapFace(), mipmap, faceResult));
if (!faceResult.Result)
{
yield break;
}
yield return(RenderCubemapFaceTextureCoroutine(negativeZ, dst, GltfCubemapFace.NegativeZ.ConvertToUnityCubemapFace(), mipmap, faceResult));
if (!faceResult.Result)
{
yield break;
}
result.Result = true;
}
public IEnumerator ConvertCubemapCoroutine(glTFCubemapTexture gltfCubemapTexture, CubemapTextureImporterResult result)
{
var success = true;
var mipLength = gltfCubemapTexture.mipmapCount; // original を含めない mipmap だけの個数
var width = _textureGetter(gltfCubemapTexture.texture.cubemapPositiveX.index).Texture.width;
var cubemap = new Cubemap(width, TextureFormat.RGBAHalf, mipLength + 1);
// Set original
var successResult = new CoroutineSuccessResult();
yield return(UpdateCubemapFace(gltfCubemapTexture.texture, cubemap, 0, successResult));
success &= successResult.Result;
// Set mipmaps
for (var idx = 0; idx < mipLength; ++idx)
{
var tex = gltfCubemapTexture.mipmapTextures[idx];
var mipValue = idx + 1;
var mipmapSuccessResult = new CoroutineSuccessResult();
yield return(UpdateCubemapFace(tex, cubemap, mipValue, mipmapSuccessResult));
success &= mipmapSuccessResult.Result;
}
// Apply
cubemap.Apply(updateMipmaps: false, makeNoLongerReadable: true);
yield return(null);
if (success)
{
result.Result = cubemap;
}
else
{
UnityEngine.Object.DestroyImmediate(cubemap);
}
}
private IEnumerator RenderCubemapFaceTextureCoroutine(Texture2D src, Cubemap dst, CubemapFace srcFace, int mipmap, CoroutineSuccessResult result)
{
result.Result = false;
var shader = GetImporterShader();
if (shader == null)
{
yield break;
}
var importerMaterial = new Material(shader);
if (!Mathf.IsPowerOfTwo(dst.width))
{
yield break;
}
if (!Mathf.IsPowerOfTwo(dst.height))
{
yield break;
}
var originalWidth = dst.width;
var originalHeight = dst.height;
var width = Math.Max(2, originalWidth >> mipmap);
var height = Math.Max(2, originalHeight >> mipmap);
var rt = RenderTexture.GetTemporary(width, height, 0, RenderTextureFormat.DefaultHDR, RenderTextureReadWrite.Linear);
// Decode into Linear RenderTexture
Graphics.Blit(src, rt, importerMaterial);
UnityEngine.Object.DestroyImmediate(importerMaterial);
yield return(null);
// Copy to Linear Texture2D
var tex = new Texture2D(rt.width, rt.height, TextureFormat.RGBAHalf, mipCount: 0, linear: true);
var tmpActive = RenderTexture.active;
RenderTexture.active = rt;
tex.ReadPixels(new Rect(0, 0, rt.width, rt.height), 0, 0);
tex.Apply(updateMipmaps: false, makeNoLongerReadable: false);
RenderTexture.active = tmpActive;
RenderTexture.ReleaseTemporary(rt);
yield return(null);
// Copy to Cubemap
var array = tex.GetPixels(0, 0, tex.width, tex.height);
var len = array.Length;
var array2 = new Color[len];
for (var yIdx = 0; yIdx < tex.height; ++yIdx)
{
var startIdx = yIdx * tex.width;
var endIdx = startIdx + tex.width - 1;
for (var xIdx = 0; xIdx < tex.width; ++xIdx)
{
// Cubemap が X 軸反転のレガシー仕様をひきずっている、また、Skybox 参照が反対になる、Cubemap と Texture2D で Set/GetPixel の仕様が違う、ので
// すべてを考えたときに
// データとしては左右反転になるようにする。
var srcIdx = (yIdx * tex.width) + xIdx;
var dstIdx = ((tex.height - yIdx - 1) * tex.width) + xIdx;
array2[dstIdx] = array[srcIdx];
}
}
dst.SetPixels(array2, srcFace, mipmap);
yield return(null);
UnityEngine.Object.Destroy(tex);
result.Result = true;
}