/// <summary>
/// Create a <see cref="HeifIccColorProfile"/> from the specified image handle.
/// </summary>
/// <param name="handle">The handle.</param>
/// <returns>The created profile.</returns>
/// <exception cref="HeifException">
/// A LibHeif error occurred.
///
/// -or-
///
/// The ICC profile is larger than 2 GB.
/// </exception>
internal static unsafe HeifIccColorProfile TryCreate(SafeHeifImageHandle handle)
{
HeifIccColorProfile profile = null;
ulong iccProfileSize = LibHeifNative.heif_image_handle_get_raw_color_profile_size(handle).ToUInt64();
if (iccProfileSize > 0)
{
if (iccProfileSize > int.MaxValue)
{
ExceptionUtil.ThrowHeifException(Resources.IccProfileLargerThan2Gb);
}
byte[] iccProfileBytes = new byte[iccProfileSize];
fixed(byte *ptr = iccProfileBytes)
{
var error = LibHeifNative.heif_image_handle_get_raw_color_profile(handle, ptr);
error.ThrowIfError();
}
profile = new HeifIccColorProfile(iccProfileBytes, copyToNewArray: false);
}
return(profile);
}
/// <summary>
/// Gets image color profile.
/// </summary>
/// <returns>The image color profile.</returns>
/// <exception cref="HeifException">
/// The color profile type is not supported.
///
/// -or-
///
/// A LibHeif error occurred.
/// </exception>
private unsafe HeifColorProfile GetImageColorProfile()
{
HeifColorProfile profile = null;
var colorProfileType = LibHeifNative.heif_image_get_color_profile_type(this.image);
switch (colorProfileType)
{
case heif_color_profile_type.None:
break;
case heif_color_profile_type.Nclx:
profile = new HeifNclxColorProfile(this.image);
break;
case heif_color_profile_type.IccProfile:
case heif_color_profile_type.RestrictedIcc:
profile = new HeifIccColorProfile(this.image);
break;
default:
throw new HeifException(Resources.ColorProfileTypeNotSupported);
}
return(profile);
}
/// <summary>
/// Initializes a new instance of the <see cref="HeifImage" /> class.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="imageHandleIccColorProfile">The image handle ICC color profile.</param>
/// <param name="imageHandleNclxColorProfile">The image handle NCLX color profile.</param>
internal HeifImage(SafeHeifImage image,
int width,
int height,
HeifIccColorProfile imageHandleIccColorProfile,
HeifNclxColorProfile imageHandleNclxColorProfile)
{
Validate.IsNotNull(image, nameof(image));
this.image = image;
this.cachedIccColorProfile = imageHandleIccColorProfile;
this.cachedNclxColorProfile = imageHandleNclxColorProfile;
this.fetchedColorProfilesFromImage = this.cachedIccColorProfile != null || this.cachedNclxColorProfile != null;
this.sync = new object();
this.Width = width;
this.Height = height;
this.Colorspace = LibHeifNative.heif_image_get_colorspace(image);
this.Chroma = LibHeifNative.heif_image_get_chroma_format(image);
}
/// <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>
/// Initializes a new instance of the <see cref="HeifImage"/> class.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="colorspace">The color space.</param>
/// <param name="chroma">The chroma.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="width"/> is less than or equal to zero.
///
/// -or-
///
/// <paramref name="height"/> is less than or equal to zero.
/// </exception>
/// <exception cref="HeifException">
/// A LibHeif error occurred.
///
/// -or-
///
/// The LibHeif version is not supported.
/// </exception>
public HeifImage(int width, int height, HeifColorspace colorspace, HeifChroma chroma)
{
Validate.IsPositive(width, nameof(width));
Validate.IsPositive(height, nameof(height));
LibHeifVersion.ThrowIfNotSupported();
var error = LibHeifNative.heif_image_create(width,
height,
colorspace,
chroma,
out this.image);
error.ThrowIfError();
// The caller can set a color profile after the image has been created.
this.cachedIccColorProfile = null;
this.cachedNclxColorProfile = null;
this.fetchedColorProfilesFromImage = true;
this.sync = new object();
this.Width = width;
this.Height = height;
this.Colorspace = colorspace;
this.Chroma = chroma;
}
/// <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);
}
}
}
public ImageHandleColorProfiles(HeifIccColorProfile icc, HeifNclxColorProfile nclx)
{
this.Icc = icc;
this.Nclx = nclx;
}