gl01/internal/igwrap/convert.go

package igwrap

import (
	"math"

	"edgaru089.ink/go/gl01/internal/util/itype"
	"github.com/inkyblackness/imgui-go/v4"
)

// Color converts non-premultiplied RGBA color into imgui.Vec4.
func Color(r, g, b, a uint8) imgui.Vec4 {
	return imgui.Vec4{
		X: float32(r) / 255,
		Y: float32(g) / 255,
		Z: float32(b) / 255,
		W: float32(a) / 255,
	}
}

// PackedColor converts RGBA to imgui.PackedColor.
func PackedColor(color itype.Vec4f) imgui.PackedColor {
	return imgui.PackedColorFromVec4(Vec4(color))
}

// UnpackedColor unpacks a color to RGBA.
func UnpackedColor(color imgui.PackedColor) itype.Vec4f {
	r, g, b, a := color.RGBA()
	return itype.Vec4f{
		float32(r) / float32(math.MaxUint32),
		float32(g) / float32(math.MaxUint32),
		float32(b) / float32(math.MaxUint32),
		float32(a) / float32(math.MaxUint32),
	}
}

// Vec2 converts itype.Vec2f to imgui.Vec2.
func Vec2(v itype.Vec2f) imgui.Vec2 {
	return imgui.Vec2{X: v[0], Y: v[1]}
}

// Vec2f converts imgui.Vec2 to itype.Vec2f.
func Vec2f(v imgui.Vec2) itype.Vec2f {
	return itype.Vec2f{v.X, v.Y}
}

// Vec4 converts itype.Vec4f to imgui.Vec4.
func Vec4(v itype.Vec4f) imgui.Vec4 {
	return imgui.Vec4{X: v[0], Y: v[1], Z: v[2], W: v[3]}
}