package scene

import "gioui.org/internal/scene"

Package scene encodes and decodes graphics commands in the format used by the compute renderer.

Index ¶

• Constants
• func DecodeCubic(cmd Command) (from, ctrl0, ctrl1, to f32.Point)
• func DecodeGap(cmd Command) (from, to f32.Point)
• func DecodeLine(cmd Command) (from, to f32.Point)
• func DecodeQuad(cmd Command) (from, ctrl, to f32.Point)
• type Command
• func BeginClip(bbox f32.Rectangle) Command
• func Cubic(start, ctrl0, ctrl1, end f32.Point) Command
• func EndClip(bbox f32.Rectangle) Command
• func FillColor(col color.RGBA) Command
• func FillImage(index int, offset image.Point) Command
• func Gap(start, end f32.Point) Command
• func Line(start, end f32.Point) Command
• func Quad(start, ctrl, end f32.Point) Command
• func SetFillMode(mode FillMode) Command
• func SetLineWidth(width float32) Command
• func Transform(m f32.Affine2D) Command
• func (c Command) Op() Op
• func (c Command) String() string
• type FillMode
• type Op

Constants ¶

const (
	FillModeNonzero = 0
	FillModeStroke  = 1
)

const CommandSize = int(unsafe.Sizeof(Command{}))

Functions ¶

func DecodeCubic ¶

func DecodeCubic(cmd Command) (from, ctrl0, ctrl1, to f32.Point)

func DecodeGap ¶

func DecodeGap(cmd Command) (from, to f32.Point)

func DecodeLine ¶

func DecodeLine(cmd Command) (from, to f32.Point)

func DecodeQuad ¶

func DecodeQuad(cmd Command) (from, ctrl, to f32.Point)

Types ¶

type Command ¶

type Command [sceneElemSize / 4]uint32

func BeginClip ¶

func BeginClip(bbox f32.Rectangle) Command

func Cubic ¶

func Cubic(start, ctrl0, ctrl1, end f32.Point) Command

func EndClip ¶

func EndClip(bbox f32.Rectangle) Command

func FillColor ¶

func FillColor(col color.RGBA) Command

func FillImage ¶

func FillImage(index int, offset image.Point) Command

func Gap ¶

func Gap(start, end f32.Point) Command

func Line ¶

func Line(start, end f32.Point) Command

func Quad ¶

func Quad(start, ctrl, end f32.Point) Command

func SetFillMode ¶

func SetFillMode(mode FillMode) Command

func SetLineWidth ¶

func SetLineWidth(width float32) Command

func Transform ¶

func Transform(m f32.Affine2D) Command

func (Command) Op ¶

func (c Command) Op() Op

func (Command) String ¶

func (c Command) String() string

type FillMode ¶

type FillMode uint32

FillModes, from setup.h.

type Op ¶

type Op uint32

const (
	OpNop Op = iota
	OpLine
	OpQuad
	OpCubic
	OpFillColor
	OpLineWidth
	OpTransform
	OpBeginClip
	OpEndClip
	OpFillImage
	OpSetFillMode
	OpGap
)

GPU commands from piet/scene.h in package gioui.org/shaders.

Source Files ¶

scene.go