static BytesWithMime GetBytesWithMime(Texture texture, glTFTextureTypes textureType)
{
#if UNITY_EDITOR
var path = UnityPath.FromAsset(texture);
if (path.IsUnderAssetsFolder)
{
if (path.Extension == ".png")
{
return(new BytesWithMime
{
Bytes = System.IO.File.ReadAllBytes(path.FullPath),
Mime = "image/png",
});
}
if (path.Extension == ".jpg")
{
return(new BytesWithMime
{
Bytes = System.IO.File.ReadAllBytes(path.FullPath),
Mime = "image/jpeg",
});
}
}
#endif
return(new BytesWithMime
{
Bytes = TextureItem.CopyTexture(texture, TextureIO.GetColorSpace(textureType), null).EncodeToPNG(),
Mime = "image/png",
});
}
public static int ExportTexture(glTF gltf, int bufferIndex, Texture texture, glTFTextureTypes textureType)
{
var bytesWithMime = GetBytesWithMime(texture, textureType);;
// add view
var view = gltf.buffers[bufferIndex].Append(bytesWithMime.Bytes, glBufferTarget.NONE);
var viewIndex = gltf.AddBufferView(view);
// add image
var imageIndex = gltf.images.Count;
gltf.images.Add(new glTFImage
{
name = texture.name,
bufferView = viewIndex,
mimeType = bytesWithMime.Mime,
});
// add sampler
var samplerIndex = gltf.samplers.Count;
var sampler = TextureSamplerUtil.Export(texture);
gltf.samplers.Add(sampler);
// add texture
gltf.textures.Add(new glTFTexture
{
sampler = samplerIndex,
source = imageIndex,
});
return(imageIndex);
}
/// <summary>
/// Texture の export index を得る
/// </summary>
/// <param name="src"></param>
/// <param name="textureType"></param>
/// <returns></returns>
public int GetTextureIndex(Texture src, glTFTextureTypes textureType)
{
if (src == null)
{
return(-1);
}
return(m_exportMap[new ExportKey(src, textureType)]);
}
public ExportKey(Texture src, glTFTextureTypes type)
{
if (src == null)
{
throw new ArgumentNullException();
}
Src = src;
TextureType = type;
}
public virtual (Byte[] bytes, string mine) GetBytesWithMime(Texture texture, glTFTextureTypes textureType)
{
#if UNITY_EDITOR
var path = UnityPath.FromAsset(texture);
if (path.IsUnderAssetsFolder)
{
var textureImporter = AssetImporter.GetAtPath(path.Value) as TextureImporter;
var getSizeMethod = typeof(TextureImporter).GetMethod("GetWidthAndHeight", BindingFlags.NonPublic | BindingFlags.Instance);
if (textureImporter != null && getSizeMethod != null)
{
var args = new object[2] {
0, 0
};
getSizeMethod.Invoke(textureImporter, args);
var originalWidth = (int)args[0];
var originalHeight = (int)args[1];
var originalSize = Mathf.Max(originalWidth, originalHeight);
var requiredMaxSize = textureImporter.maxTextureSize;
// Resized exporting if MaxSize setting value is smaller than original image size.
if (originalSize > requiredMaxSize)
{
return
(
TextureConverter.CopyTexture(texture, GetColorSpace(textureType), null).EncodeToPNG(),
"image/png"
);
}
}
if (path.Extension == ".png")
{
return
(
System.IO.File.ReadAllBytes(path.FullPath),
"image/png"
);
}
if (path.Extension == ".jpg")
{
return
(
System.IO.File.ReadAllBytes(path.FullPath),
"image/jpeg"
);
}
}
#endif
return
(
TextureConverter.CopyTexture(texture, TextureIO.GetColorSpace(textureType), null).EncodeToPNG(),
"image/png"
);
}
public static Texture2D Convert(Texture2D texture, glTFTextureTypes textureType, ColorConversion colorConversion, Material convertMaterial)
{
var copyTexture = TextureItem.CopyTexture(texture, TextureIO.GetColorSpace(textureType), convertMaterial);
if (colorConversion != null)
{
copyTexture.SetPixels32(copyTexture.GetPixels32().Select(x => colorConversion(x)).ToArray());
copyTexture.Apply();
}
copyTexture.name = texture.name;
return(copyTexture);
}
public static RenderTextureReadWrite GetColorSpace(this glTFTextureTypes textureType)
{
switch (textureType)
{
case glTFTextureTypes.SRGB:
return(RenderTextureReadWrite.sRGB);
case glTFTextureTypes.OcclusionMetallicRoughness:
case glTFTextureTypes.Normal:
return(RenderTextureReadWrite.Linear);
default:
throw new NotImplementedException();
}
}
public static bool TryGetglTFTextureType(this glTF glTf, int textureIndex, out glTFTextureTypes textureType)
{
foreach (var material in glTf.materials)
{
var textureInfo = material.GetTextures().FirstOrDefault(x => (x != null) && x.index == textureIndex);
if (textureInfo != null)
{
textureType = textureInfo.TextureType;
return(true);
}
}
// textureIndex is not used by Material.
textureType = default;
return(false);
}
public static RenderTextureReadWrite GetColorSpace(glTFTextureTypes textureType)
{
switch (textureType)
{
case glTFTextureTypes.Metallic:
case glTFTextureTypes.Normal:
case glTFTextureTypes.Occlusion:
return(RenderTextureReadWrite.Linear);
case glTFTextureTypes.BaseColor:
case glTFTextureTypes.Emissive:
return(RenderTextureReadWrite.sRGB);
default:
return(RenderTextureReadWrite.sRGB);
}
}
public static Texture2D CopyTexture(Texture src, glTFTextureTypes textureType, Material material)
{
Texture2D dst = null;
RenderTextureReadWrite colorSpace = textureType.GetColorSpace();
var renderTexture = new RenderTexture(src.width, src.height, 0, RenderTextureFormat.ARGB32, colorSpace);
using (var scope = new ColorSpaceScope(colorSpace))
{
if (material != null)
{
Graphics.Blit(src, renderTexture, material);
}
else
{
Graphics.Blit(src, renderTexture);
}
}
dst = new Texture2D(src.width, src.height, TextureFormat.ARGB32, false, colorSpace == RenderTextureReadWrite.Linear);
dst.ReadPixels(new Rect(0, 0, src.width, src.height), 0, 0);
dst.name = src.name;
dst.anisoLevel = src.anisoLevel;
dst.filterMode = src.filterMode;
dst.mipMapBias = src.mipMapBias;
dst.wrapMode = src.wrapMode;
#if UNITY_2017_1_OR_NEWER
dst.wrapModeU = src.wrapModeU;
dst.wrapModeV = src.wrapModeV;
dst.wrapModeW = src.wrapModeW;
#endif
dst.Apply();
RenderTexture.active = null;
if (Application.isEditor)
{
GameObject.DestroyImmediate(renderTexture);
}
else
{
GameObject.Destroy(renderTexture);
}
return(dst);
}
static BytesWithMime GetBytesWithMime(Texture texture, glTFTextureTypes textureType)
{
/*
#if UNITY_EDITOR
* var path = UnityPath.FromAsset(texture);
* if (path.IsUnderAssetsFolder)
* {
* if (path.Extension == ".png")
* {
* return new BytesWithMime
* {
* Bytes = System.IO.File.ReadAllBytes(path.FullPath),
* Mime = "image/png",
* };
* }
* }
#endif
*/
return(new BytesWithMime
{
Bytes = TextureItem.CopyTexture(texture, TextureIO.GetColorSpace(textureType), null).EncodeToPNG(),
Mime = "image/png",
});
}
public TextureExportItem(Texture texture, glTFTextureTypes textureType)
{
Texture = texture;
TextureType = textureType;
}
