mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 15:45:38 +00:00
Elias Naur
dd35a48a61
The draw package name clashes with the standard library draw package. Signed-off-by: Elias Naur <mail@eliasnaur.com>
73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
|
|
|
|
package paint
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"image"
|
|
"image/color"
|
|
"math"
|
|
|
|
"gioui.org/ui"
|
|
"gioui.org/ui/f32"
|
|
"gioui.org/ui/internal/opconst"
|
|
)
|
|
|
|
type ImageOp struct {
|
|
Src image.Image
|
|
Rect image.Rectangle
|
|
}
|
|
|
|
type ColorOp struct {
|
|
Color color.RGBA
|
|
}
|
|
|
|
type PaintOp struct {
|
|
Rect f32.Rectangle
|
|
}
|
|
|
|
func (i ImageOp) Add(o *ui.Ops) {
|
|
data := make([]byte, opconst.TypeImageLen)
|
|
data[0] = byte(opconst.TypeImage)
|
|
bo := binary.LittleEndian
|
|
bo.PutUint32(data[1:], uint32(i.Rect.Min.X))
|
|
bo.PutUint32(data[5:], uint32(i.Rect.Min.Y))
|
|
bo.PutUint32(data[9:], uint32(i.Rect.Max.X))
|
|
bo.PutUint32(data[13:], uint32(i.Rect.Max.Y))
|
|
o.Write(data, i.Src)
|
|
}
|
|
|
|
func (c ColorOp) Add(o *ui.Ops) {
|
|
data := make([]byte, opconst.TypeColorLen)
|
|
data[0] = byte(opconst.TypeColor)
|
|
data[1] = c.Color.R
|
|
data[2] = c.Color.G
|
|
data[3] = c.Color.B
|
|
data[4] = c.Color.A
|
|
o.Write(data)
|
|
}
|
|
|
|
func (d PaintOp) Add(o *ui.Ops) {
|
|
data := make([]byte, opconst.TypePaintLen)
|
|
data[0] = byte(opconst.TypePaint)
|
|
bo := binary.LittleEndian
|
|
bo.PutUint32(data[1:], math.Float32bits(d.Rect.Min.X))
|
|
bo.PutUint32(data[5:], math.Float32bits(d.Rect.Min.Y))
|
|
bo.PutUint32(data[9:], math.Float32bits(d.Rect.Max.X))
|
|
bo.PutUint32(data[13:], math.Float32bits(d.Rect.Max.Y))
|
|
o.Write(data)
|
|
}
|
|
|
|
// RectClip returns a ClipOp op corresponding to
|
|
// a pixel aligned rectangular area.
|
|
func RectClip(r image.Rectangle) ClipOp {
|
|
return ClipOp{bounds: toRectF(r)}
|
|
}
|
|
|
|
func toRectF(r image.Rectangle) f32.Rectangle {
|
|
return f32.Rectangle{
|
|
Min: f32.Point{X: float32(r.Min.X), Y: float32(r.Min.Y)},
|
|
Max: f32.Point{X: float32(r.Max.X), Y: float32(r.Max.Y)},
|
|
}
|
|
}
|