/// <summary>
/// Fills in gltfTexture.unityTexture with a Texture2D.
/// </summary>
/// <param name="gltfTexture">The glTF texture to convert.</param>
/// <param name="loader">The IUriLoader to use for loading image files.</param>
/// <returns>On completion of the coroutine, gltfTexture.unityTexture will be non-null
/// on success.</returns>
private static IEnumerable ConvertTextureCoroutine(
GltfTextureBase gltfTexture, IUriLoader loader)
{
if (gltfTexture.unityTexture != null)
{
throw new InvalidOperationException("Already converted");
}
if (gltfTexture.SourcePtr == null)
{
Debug.LogErrorFormat("No image for texture {0}", gltfTexture.GltfId);
yield break;
}
Texture2D tex;
if (gltfTexture.SourcePtr.data != null)
{
// This case is hit if the client code hooks up its own threaded
// texture-loading mechanism.
var data = gltfTexture.SourcePtr.data;
tex = new Texture2D(data.colorWidth, data.colorHeight, data.format, true);
yield return(null);
tex.SetPixels32(data.colorData);
yield return(null);
tex.Apply();
yield return(null);
}
else
{
#if UNITY_EDITOR
// Prefer to load the Asset rather than create a new Texture2D;
// that lets the resulting prefab reference the texture rather than
// embedding it inside the prefab.
tex = loader.LoadAsAsset(gltfTexture.SourcePtr.uri);
#else
tex = null;
#endif
if (tex == null)
{
byte[] textureBytes;
using (IBufferReader r = loader.Load(gltfTexture.SourcePtr.uri)) {
textureBytes = new byte[r.GetContentLength()];
r.Read(textureBytes, destinationOffset: 0, readStart: 0, readSize: textureBytes.Length);
}
tex = new Texture2D(1, 1);
tex.LoadImage(textureBytes, markNonReadable: false);
yield return(null);
}
}
tex.name = SanitizeName(gltfTexture.SourcePtr.uri);
gltfTexture.unityTexture = tex;
}
