/// <summary>
/// Gets image handle color profiles.
/// </summary>
/// <returns>The image handle color profiles.</returns>
/// <exception cref="HeifException">
/// The color profile type is not supported.
///
/// -or-
///
/// A LibHeif error occurred.
/// </exception>
private unsafe ImageHandleColorProfiles GetImageHandleColorProfiles()
{
HeifIccColorProfile iccProfile;
HeifNclxColorProfile nclxProfile;
if (LibHeifVersion.Is1Point10OrLater)
{
iccProfile = HeifIccColorProfile.TryCreate(this.imageHandle);
nclxProfile = HeifNclxColorProfile.TryCreate(this.imageHandle);
}
else
{
// LibHeif versions prior to 1.10 only support one color profile per image.
var colorProfileType = LibHeifNative.heif_image_handle_get_color_profile_type(this.imageHandle);
switch (colorProfileType)
{
case heif_color_profile_type.None:
iccProfile = null;
nclxProfile = null;
break;
case heif_color_profile_type.Nclx:
iccProfile = null;
nclxProfile = HeifNclxColorProfile.TryCreate(this.imageHandle);
break;
case heif_color_profile_type.IccProfile:
case heif_color_profile_type.RestrictedIcc:
iccProfile = HeifIccColorProfile.TryCreate(this.imageHandle);
nclxProfile = null;
break;
default:
throw new HeifException(Resources.ColorProfileTypeNotSupported);
}
}
return(new ImageHandleColorProfiles(iccProfile, nclxProfile));
}
/// <summary>
/// Updates the cached color profiles while locked.
/// </summary>
/// <exception cref="HeifException">
/// The color profile type is not supported.
///
/// -or-
///
/// A LibHeif error occurred.
/// </exception>
private void UpdateCachedColorProfilesWhileLocked()
{
if (LibHeifVersion.Is1Point12OrLater)
{
this.cachedIccColorProfile = HeifIccColorProfile.TryCreate(this.image);
this.cachedNclxColorProfile = HeifNclxColorProfile.TryCreate(this.image);
}
else
{
// LibHeif version 1.11 and earlier will crash when retrieving the NCLX color
// profile if the image does not have one.
var colorProfileType = LibHeifNative.heif_image_get_color_profile_type(this.image);
switch (colorProfileType)
{
case heif_color_profile_type.None:
this.cachedIccColorProfile = null;
this.cachedNclxColorProfile = null;
break;
case heif_color_profile_type.Nclx:
this.cachedIccColorProfile = null;
this.cachedNclxColorProfile = HeifNclxColorProfile.TryCreate(this.image);
break;
case heif_color_profile_type.IccProfile:
case heif_color_profile_type.RestrictedIcc:
this.cachedIccColorProfile = HeifIccColorProfile.TryCreate(this.image);
this.cachedNclxColorProfile = null;
break;
default:
throw new HeifException(Resources.ColorProfileTypeNotSupported);
}
}
}
