diff --git a/internal/ops/ops.go b/internal/ops/ops.go
index 49f68d73..a584a615 100644
--- a/internal/ops/ops.go
+++ b/internal/ops/ops.go
@@ -5,12 +5,15 @@ package ops
 import (
 	"encoding/binary"
 	"math"
+	"unsafe"
 
 	"gioui.org/f32"
+	"gioui.org/internal/byteslice"
 	"gioui.org/internal/opconst"
+	"gioui.org/internal/scene"
 )
 
-const QuadSize = 4 * 2 * 3
+const QuadSize = int(unsafe.Sizeof(scene.Command{}))
 
 type Quad struct {
 	From, Ctrl, To f32.Point
@@ -23,26 +26,10 @@ func (q Quad) Transform(t f32.Affine2D) Quad {
 	return q
 }
 
-func EncodeQuad(d []byte, q Quad) {
-	d = d[:24]
-	bo := binary.LittleEndian
-	bo.PutUint32(d[0:], math.Float32bits(q.From.X))
-	bo.PutUint32(d[4:], math.Float32bits(q.From.Y))
-	bo.PutUint32(d[8:], math.Float32bits(q.Ctrl.X))
-	bo.PutUint32(d[12:], math.Float32bits(q.Ctrl.Y))
-	bo.PutUint32(d[16:], math.Float32bits(q.To.X))
-	bo.PutUint32(d[20:], math.Float32bits(q.To.Y))
-}
-
 func DecodeQuad(d []byte) (q Quad) {
-	d = d[:24]
-	bo := binary.LittleEndian
-	q.From.X = math.Float32frombits(bo.Uint32(d[0:]))
-	q.From.Y = math.Float32frombits(bo.Uint32(d[4:]))
-	q.Ctrl.X = math.Float32frombits(bo.Uint32(d[8:]))
-	q.Ctrl.Y = math.Float32frombits(bo.Uint32(d[12:]))
-	q.To.X = math.Float32frombits(bo.Uint32(d[16:]))
-	q.To.Y = math.Float32frombits(bo.Uint32(d[20:]))
+	var cmd scene.Command
+	copy(byteslice.Slice(cmd[:]), d)
+	q.From, q.Ctrl, q.To = scene.DecodeQuad(cmd)
 	return
 }
 
diff --git a/internal/scene/scene.go b/internal/scene/scene.go
index b83c6ab8..9ba916a9 100644
--- a/internal/scene/scene.go
+++ b/internal/scene/scene.go
@@ -123,3 +123,13 @@ func FillImage(index int) Command {
 		1: uint32(index),
 	}
 }
+
+func DecodeQuad(cmd Command) (from, ctrl, to f32.Point) {
+	if cmd[0] != elemFillQuad {
+		panic("invalid command")
+	}
+	from = f32.Pt(math.Float32frombits(cmd[1]), math.Float32frombits(cmd[2]))
+	ctrl = f32.Pt(math.Float32frombits(cmd[3]), math.Float32frombits(cmd[4]))
+	to = f32.Pt(math.Float32frombits(cmd[5]), math.Float32frombits(cmd[6]))
+	return
+}
diff --git a/op/clip/clip.go b/op/clip/clip.go
index 3a2cd9e3..7adc3ab8 100644
--- a/op/clip/clip.go
+++ b/op/clip/clip.go
@@ -8,8 +8,10 @@ import (
 	"math"
 
 	"gioui.org/f32"
+	"gioui.org/internal/byteslice"
 	"gioui.org/internal/opconst"
 	"gioui.org/internal/ops"
+	"gioui.org/internal/scene"
 	"gioui.org/op"
 )
 
@@ -155,11 +157,7 @@ func (p *Path) QuadTo(ctrl, to f32.Point) {
 	data := p.ops.Write(ops.QuadSize + 4)
 	bo := binary.LittleEndian
 	bo.PutUint32(data[0:], uint32(p.contour))
-	ops.EncodeQuad(data[4:], ops.Quad{
-		From: p.pen,
-		Ctrl: ctrl,
-		To:   to,
-	})
+	encodeCommand(data[4:], scene.Quad(p.pen, ctrl, to, false))
 	p.pen = to
 	p.hasSegments = true
 }
@@ -395,3 +393,7 @@ func (o Outline) Op() Op {
 		outline: true,
 	}
 }
+
+func encodeCommand(out []byte, cmd scene.Command) {
+	copy(out, byteslice.Slice(cmd[:]))
+}