Struct BasisuTranscoder 

pub struct BasisuTranscoder { /* private fields */ }

Available on crate feature extra only.

Implementations

impl BasisuTranscoder

pub fn new( input: &[u8], supported_compressed_formats: SupportedTextureCompression, channel_type_hint: ChannelType, ) -> Result<Self, BasisuTranscodeError>

Create a transcoder and set the input data of ktx2 basisu file in bytes.

Panic if basisu_transcoder_init hasn’t been called.

supported_compressed_formats and channel_type_hint affect the preferred transcode target.

channel_type_hint only has effect if the basisu texture is ETC1S, or device only supports ETC2. If it’s ChannelType::Auto, it will be determined automatically according to ktx2 dfd channel ids.

Default transcode target selection:

BasisU format	Target selection
ETC1S	Bc7Rgba/Bc5Rg/Bc4R > Etc2Rgba8/Etc2Rgb8/EacRg11/EacR11 > Rgba8
UASTC_LDR, ASTC_LDR, XUASTC_LDR	Astc > Bc7Rgba > Etc2Rgba8/Etc2Rgb8/EacRg11/EacR11 > Rgba8
UASTC_HDR, ASTC_HDR	Astc > Bc6hRgbUfloat > Rgba16Float

pub fn get_info(&self) -> TranscodeInfo

Get the input info TranscodeInfo.

pub fn transcode( &self, transcode_target: Option<TranscodeTargetFormat>, is_srgb: Option<bool>, ) -> Result<TranscodedImage, BasisuTranscodeError>

Transcode the input data and return the image. Return error if it’s not prepared or transcoding failed.

If transcode_target/is_srgb is None, it will use TranscodeInfo::preferred_target/TranscodeInfo::is_srgb.