exr

package

v0.0.0-...-6f71fe9 Latest Latest Go to latest Published: Mar 2, 2024 License: Apache-2.0, MIT Imports: 9 Imported by: 0

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Repository

github.com/peter-mount/go-anim

Links

Open Source Insights

Documentation ¶

Index ¶

Constants
Variables
func AppendNullTerminatedString[T ~string](b []byte, s T) []byte
func ChunkCount(dataWindow Box2i, compression Compression) int
func Read(in io.Reader, data any) error
func ReadAttributeName(in io.Reader, target *AttributeName) error
func ReadAttributeType(in io.Reader, target *AttributeType) error
func ReadBox2i(in io.Reader, target *Box2i) error
func ReadChannelList(in io.Reader, target *ChannelList) error
func ReadCompression(in io.Reader, target *Compression) error
func ReadHeader(in io.Reader, target *Header) error
func ReadLineOrder(in io.Reader, target *LineOrder) error
func ReadMagic(in io.Reader, target *Magic) error
func ReadNullTerminatedString[T ~string](in io.Reader, target *T) error
func ReadOffsets(in io.Reader, chunkCount int) error
func ReadScanLineBlock(in io.Reader, dataWindow Box2i, compression Compression, ...) error
func ReadVersion(in io.Reader, target *Version) error
func Write(w io.Writer, data any) error
func WriteAttribute(w io.Writer, n AttributeName, t AttributeType, a any) error
func WriteAttributeBytes(w io.Writer, n AttributeName, t AttributeType, s int32, b []byte) error
func WriteAttributeHeader(w io.Writer, n AttributeName, t AttributeType, s int32) error
func WriteMagic(w io.Writer) error
func WriteNullTerminatedString[T ~string](w io.Writer, s T) error
type AttributeName
type AttributeType
type Box2i
- func Box2iFromRect(r image.Rectangle) Box2i
- func (b Box2i) Bytes() []byte
- func (b Box2i) Contains(other Box2i) bool
- func (b Box2i) Height() int32
- func (b Box2i) Width() int32
type BytesAttribute
type Channel
type ChannelList
- func (l ChannelList) Bytes() []byte
type Compression
- func (c Compression) Bytes() []byte
- func (c Compression) LineCount() int
- func (c Compression) String() string
type Compressor
- func NewNopCompressor() Compressor
- func NewZipCompressor() Compressor
type Decompressor
- func NewNopDecompressor() Decompressor
- func NewZipDecompressor() Decompressor
type Flag
type Header
type LineOrder
- func (o LineOrder) Bytes() []byte
- func (o LineOrder) String() string
type Magic
- func (m Magic) IsCorrect() bool
type PixelData
- func NewFloat16PixelData(window Box2i, xSampling, ySampling int32) PixelData
- func NewFloat32PixelData(window Box2i, xSampling, ySampling int32) PixelData
- func NewNopPixelData(value float32) PixelData
- func NewUint32PixelData(window Box2i, xSampling, ySampling int32) PixelData
type PixelType
- func (t PixelType) String() string
type V2F
- func (v V2F) Bytes() []byte
type Version
- func (v Version) HasFlag(flag Flag) bool
- func (v Version) Number() int

Constants ¶

View Source

const (
	Extension = "exr"
)

View Source

const (
	SupportedVersion = 2
)

Variables ¶

View Source

var (
	MagicSequence = [4]byte{0x76, 0x2F, 0x31, 0x01}
)

Functions ¶

func AppendNullTerminatedString ¶

func AppendNullTerminatedString[T ~string](b []byte, s T) []byte

func ChunkCount ¶

func ChunkCount(dataWindow Box2i, compression Compression) int

func Read ¶

func Read(in io.Reader, data any) error

func ReadAttributeName ¶

func ReadAttributeName(in io.Reader, target *AttributeName) error

func ReadAttributeType ¶

func ReadAttributeType(in io.Reader, target *AttributeType) error

func ReadBox2i ¶

func ReadBox2i(in io.Reader, target *Box2i) error

func ReadChannelList ¶

func ReadChannelList(in io.Reader, target *ChannelList) error

func ReadCompression ¶

func ReadCompression(in io.Reader, target *Compression) error

func ReadHeader ¶

func ReadHeader(in io.Reader, target *Header) error

func ReadLineOrder ¶

func ReadLineOrder(in io.Reader, target *LineOrder) error

func ReadMagic ¶

func ReadMagic(in io.Reader, target *Magic) error

func ReadNullTerminatedString ¶

func ReadNullTerminatedString[T ~string](in io.Reader, target *T) error

func ReadOffsets ¶

func ReadOffsets(in io.Reader, chunkCount int) error

func ReadScanLineBlock ¶

func ReadScanLineBlock(in io.Reader, dataWindow Box2i, compression Compression, decompressor Decompressor, dataChannels []PixelData) error

func ReadVersion ¶

func ReadVersion(in io.Reader, target *Version) error

func Write ¶

func Write(w io.Writer, data any) error

func WriteAttribute ¶

func WriteAttribute(w io.Writer, n AttributeName, t AttributeType, a any) error

func WriteAttributeBytes ¶

func WriteAttributeBytes(w io.Writer, n AttributeName, t AttributeType, s int32, b []byte) error

func WriteAttributeHeader ¶

func WriteAttributeHeader(w io.Writer, n AttributeName, t AttributeType, s int32) error

WriteAttributeHeader writes an attribute minus its data. It's used for when the size is known but the data is not available as a single []byte

func WriteMagic ¶

func WriteMagic(w io.Writer) error

func WriteNullTerminatedString ¶

func WriteNullTerminatedString[T ~string](w io.Writer, s T) error

Types ¶

type AttributeName ¶

type AttributeName string

const (
	AttributeNameChannels           AttributeName = "channels"
	AttributeNameCompression        AttributeName = "compression"
	AttributeNameDataWindow         AttributeName = "dataWindow"
	AttributeNameDisplayWindow      AttributeName = "displayWindow"
	AttributeNameLineOrder          AttributeName = "lineOrder"
	AttributeNamePixelAspectRatio   AttributeName = "pixelAspectRatio"
	AttributeNameScreenWindowCenter AttributeName = "screenWindowCenter"
	AttributeNameScreenWindowWidth  AttributeName = "screenWindowWidth"
)

type AttributeType ¶

type AttributeType string

const (
	AttributeTypeChannelList AttributeType = "chlist"
	AttributeTypeCompression AttributeType = "compression"
	AttributeTypeBox2i       AttributeType = "box2i"
	AttributeTypeLineOrder   AttributeType = "lineOrder"
	AttributeTypeFloat       AttributeType = "float"
	AttributeTypeV2f         AttributeType = "v2f"
)

type Box2i ¶

type Box2i struct {
	XMin int32
	YMin int32
	XMax int32
	YMax int32
}

func Box2iFromRect ¶

func Box2iFromRect(r image.Rectangle) Box2i

func (Box2i) Bytes ¶

func (b Box2i) Bytes() []byte

func (Box2i) Contains ¶

func (b Box2i) Contains(other Box2i) bool

func (Box2i) Height ¶

func (b Box2i) Height() int32

func (Box2i) Width ¶

func (b Box2i) Width() int32

type BytesAttribute ¶

type BytesAttribute interface {
	Bytes() []byte
}

type Channel ¶

type Channel struct {
	Name      string
	PixelType PixelType
	Linear    bool
	XSampling int32
	YSampling int32
}

type ChannelList ¶

type ChannelList []Channel

func (ChannelList) Bytes ¶

func (l ChannelList) Bytes() []byte

type Compression ¶

type Compression uint8

const (
	CompressionNone  Compression = 0
	CompressionRLE   Compression = 1
	CompressionZIPS  Compression = 2
	CompressionZIP   Compression = 3
	CompressionPIZ   Compression = 4
	CompressionPXR24 Compression = 5
	CompressionB44   Compression = 6
	CompressionB44A  Compression = 7
)

func (Compression) Bytes ¶

func (c Compression) Bytes() []byte

func (Compression) LineCount ¶

func (c Compression) LineCount() int

func (Compression) String ¶

func (c Compression) String() string

type Compressor ¶

type Compressor interface {
	Compress(src []byte) ([]byte, error)
}

func NewNopCompressor ¶

func NewNopCompressor() Compressor

func NewZipCompressor ¶

func NewZipCompressor() Compressor

type Decompressor ¶

type Decompressor interface {
	Decompress(src *bytes.Buffer) (*bytes.Buffer, error)
}

func NewNopDecompressor ¶

func NewNopDecompressor() Decompressor

func NewZipDecompressor ¶

func NewZipDecompressor() Decompressor

type Flag ¶

type Flag int32

const (
	FlagSingleTile Flag = 1 << 8  // one at 9-th bit in version
	FlagLongName   Flag = 1 << 9  // one at 10-th bit in version
	FlagNonImage   Flag = 1 << 10 // one at 11-th bit in version
	FlagMultipart  Flag = 1 << 11 // one at 12-th bit in version
)

type Header ¶

type Header struct {
	Channels      ChannelList
	Compression   Compression
	DataWindow    Box2i
	DisplayWindow Box2i
	LineOrder     LineOrder
}

type LineOrder ¶

type LineOrder uint8

const (
	LineOrderIncreasingY LineOrder = 0
	LineOrderDecreasingY LineOrder = 1
	LineOrderRandomY     LineOrder = 2
)

func (LineOrder) Bytes ¶

func (o LineOrder) Bytes() []byte

func (LineOrder) String ¶

func (o LineOrder) String() string

type Magic ¶

type Magic [4]byte

func (Magic) IsCorrect ¶

func (m Magic) IsCorrect() bool

type PixelData ¶

type PixelData interface {
	LineSize() int32
	ReadLine(in io.Reader, y int32) error
	WriteLine(w io.Writer, y int32) error
	Float32(x, y int) float32
	Set(x, y int, v float32)
}

func NewFloat16PixelData ¶

func NewFloat16PixelData(window Box2i, xSampling, ySampling int32) PixelData

func NewFloat32PixelData ¶

func NewFloat32PixelData(window Box2i, xSampling, ySampling int32) PixelData

func NewNopPixelData ¶

func NewNopPixelData(value float32) PixelData

func NewUint32PixelData ¶

func NewUint32PixelData(window Box2i, xSampling, ySampling int32) PixelData

type PixelType ¶

type PixelType int32

const (
	PixelTypeUint  PixelType = 0
	PixelTypeHalf  PixelType = 1
	PixelTypeFloat PixelType = 2
)

func (PixelType) String ¶

func (t PixelType) String() string

type V2F ¶

type V2F struct {
	X, Y float32
}

func (V2F) Bytes ¶

func (v V2F) Bytes() []byte

type Version ¶

type Version int32

func (Version) HasFlag ¶

func (v Version) HasFlag(flag Flag) bool

func (Version) Number ¶

func (v Version) Number() int

Source Files ¶

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