ops

Documentation

Index

• Constants
• func AddCall(o *Ops, callOps *Ops, pc PC, end PC)
• func BeginMulti(o *Ops)
• func DecodeCommand(d []byte) scene.Command
• func DecodeLoad(data []byte) int
• func DecodeOpacity(data []byte) float32
• func DecodeSave(data []byte) int
• func DecodeTransform(data []byte) (t f32.Affine2D, push bool)
• func EncodeCommand(out []byte, cmd scene.Command)
• func EndMulti(o *Ops)
• func FillMacro(o *Ops, startPC PC)
• func PopMacro(o *Ops, id StackID)
• func PopOp(o *Ops, kind StackKind, sid StackID, macroID uint32)
• func Reset(o *Ops)
• func Write(o *Ops, n int) []byte
• func Write1(o *Ops, n int, ref1 interface{}) []byte
• func Write1String(o *Ops, n int, ref1 string) []byte
• func Write2(o *Ops, n int, ref1, ref2 interface{}) []byte
• func Write2String(o *Ops, n int, ref1 interface{}, ref2 string) []byte
• func Write3(o *Ops, n int, ref1, ref2, ref3 interface{}) []byte
• func WriteMulti(o *Ops, n int) []byte
• type ClipOp
  • func (op *ClipOp) Decode(data []byte)
• type EncodedOp
• type Key
• type OpType
  • func (t OpType) NumRefs() uint32
  • func (t OpType) Size() uint32
  • func (t OpType) String() string
• type Ops
• type PC
  • func PCFor(o *Ops) PC
  • func (pc PC) Add(op OpType) PC
• type Reader
  • func (r *Reader) Decode() (EncodedOp, bool)
  • func (r *Reader) Reset(ops *Ops)
  • func (r *Reader) ResetAt(ops *Ops, pc PC)
• type Shape
• type StackID
  • func PushMacro(o *Ops) StackID
  • func PushOp(o *Ops, kind StackKind) (StackID, uint32)
• type StackKind
• type StateOp
  • func Save(o *Ops) StateOp
  • func (s StateOp) Load()

Constants

const (
	TypeMacroLen            = 1 + 4 + 4
	TypeCallLen             = 1 + 4 + 4 + 4 + 4
	TypeDeferLen            = 1
	TypeTransformLen        = 1 + 1 + 4*6
	TypePopTransformLen     = 1
	TypePushOpacityLen      = 1 + 4
	TypePopOpacityLen       = 1
	TypeRedrawLen           = 1 + 8
	TypeImageLen            = 1 + 1
	TypePaintLen            = 1
	TypeColorLen            = 1 + 4
	TypeLinearGradientLen   = 1 + 8*2 + 4*2
	TypePassLen             = 1
	TypePopPassLen          = 1
	TypeInputLen            = 1
	TypeKeyInputHintLen     = 1 + 1
	TypeSaveLen             = 1 + 4
	TypeLoadLen             = 1 + 4
	TypeAuxLen              = 1
	TypeClipLen             = 1 + 4*4 + 1 + 1
	TypePopClipLen          = 1
	TypeCursorLen           = 2
	TypePathLen             = 8 + 1
	TypeStrokeLen           = 1 + 4
	TypeSemanticLabelLen    = 1
	TypeSemanticDescLen     = 1
	TypeSemanticClassLen    = 2
	TypeSemanticSelectedLen = 2
	TypeSemanticEnabledLen  = 2
	TypeActionInputLen      = 1 + 1
)

Functions

func AddCall

func AddCall(o *Ops, callOps *Ops, pc PC, end PC)

func BeginMulti

func BeginMulti(o *Ops)

func DecodeCommand

func DecodeCommand(d []byte) scene.Command

func DecodeLoad

func DecodeLoad(data []byte) int

DecodeLoad decodes the state id of a load op.

func DecodeOpacity

func DecodeOpacity(data []byte) float32

func DecodeSave

func DecodeSave(data []byte) int

DecodeSave decodes the state id of a save op.

func DecodeTransform

func DecodeTransform(data []byte) (t f32.Affine2D, push bool)

func EncodeCommand

func EncodeCommand(out []byte, cmd scene.Command)

func EndMulti

func EndMulti(o *Ops)

func FillMacro

func FillMacro(o *Ops, startPC PC)

func PopMacro

func PopMacro(o *Ops, id StackID)

func PopOp

func PopOp(o *Ops, kind StackKind, sid StackID, macroID uint32)

func Reset

func Reset(o *Ops)

func Write

func Write(o *Ops, n int) []byte

func Write1

func Write1(o *Ops, n int, ref1 interface{}) []byte

func Write1String

func Write1String(o *Ops, n int, ref1 string) []byte

func Write2

func Write2(o *Ops, n int, ref1, ref2 interface{}) []byte

func Write2String

func Write2String(o *Ops, n int, ref1 interface{}, ref2 string) []byte

func Write3

func Write3(o *Ops, n int, ref1, ref2, ref3 interface{}) []byte

func WriteMulti

func WriteMulti(o *Ops, n int) []byte

Types

type ClipOp

type ClipOp struct {
	Bounds  image.Rectangle
	Outline bool
	Shape   Shape
}

ClipOp is the shadow of clip.Op.

func (*ClipOp) Decode

func (op *ClipOp) Decode(data []byte)

type EncodedOp

type EncodedOp struct {
	Key  Key
	Data []byte
	Refs []interface{}
}

EncodedOp represents an encoded op returned by Reader.

type Key

type Key struct {
	// contains filtered or unexported fields
}

Key is a unique key for a given op.

type OpType

type OpType byte

const (
	TypeMacro OpType = iota + firstOpIndex
	TypeCall
	TypeDefer
	TypeTransform
	TypePopTransform
	TypePushOpacity
	TypePopOpacity
	TypeImage
	TypePaint
	TypeColor
	TypeLinearGradient
	TypePass
	TypePopPass
	TypeInput
	TypeKeyInputHint
	TypeSave
	TypeLoad
	TypeAux
	TypeClip
	TypePopClip
	TypeCursor
	TypePath
	TypeStroke
	TypeSemanticLabel
	TypeSemanticDesc
	TypeSemanticClass
	TypeSemanticSelected
	TypeSemanticEnabled
	TypeActionInput
)

func (OpType) NumRefs

func (t OpType) NumRefs() uint32

func (OpType) Size

func (t OpType) Size() uint32

func (OpType) String

func (t OpType) String() string

type Ops

type Ops struct {
	// contains filtered or unexported fields
}

type PC

type PC struct {
	// contains filtered or unexported fields
}

PC is an instruction counter for an operation list.

func PCFor

func PCFor(o *Ops) PC

func (PC) Add

func (pc PC) Add(op OpType) PC

type Reader

type Reader struct {
	// contains filtered or unexported fields
}

Reader parses an ops list.

func (*Reader) Decode

func (r *Reader) Decode() (EncodedOp, bool)

func (*Reader) Reset

func (r *Reader) Reset(ops *Ops)

Reset start reading from the beginning of ops.

func (*Reader) ResetAt

func (r *Reader) ResetAt(ops *Ops, pc PC)

ResetAt is like Reset, except it starts reading from pc.

type Shape

type Shape byte

const (
	Path Shape = iota
	Ellipse
	Rect
)

type StackID

type StackID struct {
	// contains filtered or unexported fields
}

func PushMacro

func PushMacro(o *Ops) StackID

func PushOp

func PushOp(o *Ops, kind StackKind) (StackID, uint32)

type StackKind

type StackKind uint8

const (
	ClipStack StackKind = iota
	TransStack
	PassStack
	OpacityStack
)

type StateOp

type StateOp struct {
	// contains filtered or unexported fields
}

StateOp represents a saved operation snapshot to be restored later.

func Save

func Save(o *Ops) StateOp

Save the effective transformation.

func (StateOp) Load

func (s StateOp) Load()

Load a previously saved operations state given its ID.