forked from joejulian/gio
Elias Naur
a369c408f9
Since clip.Path now encodes paths in the format expected by elements.comp, use that data directly instead of a roundtrip through drawOps.buildVerts. Signed-off-by: Elias Naur <mail@eliasnaur.com>
59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package ops
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import (
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"encoding/binary"
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"math"
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"gioui.org/f32"
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"gioui.org/internal/byteslice"
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"gioui.org/internal/opconst"
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"gioui.org/internal/scene"
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)
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func DecodeCommand(d []byte) scene.Command {
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var cmd scene.Command
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copy(byteslice.Uint32(cmd[:]), d)
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return cmd
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}
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func EncodeCommand(out []byte, cmd scene.Command) {
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copy(out, byteslice.Uint32(cmd[:]))
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}
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func DecodeTransform(data []byte) (t f32.Affine2D) {
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if opconst.OpType(data[0]) != opconst.TypeTransform {
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panic("invalid op")
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}
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data = data[1:]
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data = data[:4*6]
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bo := binary.LittleEndian
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a := math.Float32frombits(bo.Uint32(data))
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b := math.Float32frombits(bo.Uint32(data[4*1:]))
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c := math.Float32frombits(bo.Uint32(data[4*2:]))
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d := math.Float32frombits(bo.Uint32(data[4*3:]))
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e := math.Float32frombits(bo.Uint32(data[4*4:]))
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f := math.Float32frombits(bo.Uint32(data[4*5:]))
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return f32.NewAffine2D(a, b, c, d, e, f)
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}
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// DecodeSave decodes the state id of a save op.
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func DecodeSave(data []byte) int {
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if opconst.OpType(data[0]) != opconst.TypeSave {
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panic("invalid op")
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}
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bo := binary.LittleEndian
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return int(bo.Uint32(data[1:]))
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}
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// DecodeLoad decodes the state id and mask of a load op.
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func DecodeLoad(data []byte) (int, opconst.StateMask) {
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if opconst.OpType(data[0]) != opconst.TypeLoad {
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panic("invalid op")
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}
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bo := binary.LittleEndian
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return int(bo.Uint32(data[2:])), opconst.StateMask(data[1])
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}
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