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color.go
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color.go
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/*
* Copyright (c) 2013-2021 Utkan Güngördü <[email protected]>
* Copyright (c) 2021-2024 Piotr Grabowski
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package gomicsv
import (
"fmt"
"math"
"github.com/gotk3/gotk3/gdk"
)
type Color struct {
R byte `json:"R"`
G byte `json:"G"`
B byte `json:"B"`
A byte `json:"A"`
}
func NewColorFromGdkRGBA(rgba *gdk.RGBA) Color {
return Color{
R: colorFloat64ToByte(rgba.GetRed()),
G: colorFloat64ToByte(rgba.GetGreen()),
B: colorFloat64ToByte(rgba.GetBlue()),
A: colorFloat64ToByte(rgba.GetAlpha()),
}
}
func (color Color) ToCSS() string {
return fmt.Sprintf("rgba(%d, %d, %d, %d)", color.R, color.G, color.B, color.A)
}
func (color Color) ToPixelInt() uint32 {
return uint32(color.R)<<24 + uint32(color.G)<<16 + uint32(color.B)<<8 + uint32(color.A)
}
func (color Color) ToGdkRGBA() gdk.RGBA {
return *gdk.NewRGBA(
colorByteToFloat64(color.R),
colorByteToFloat64(color.G),
colorByteToFloat64(color.B),
colorByteToFloat64(color.A),
)
}
func colorFloat64ToByte(f float64) byte {
return byte(math.Round(f * 255.0))
}
func colorByteToFloat64(b byte) float64 {
return float64(b) / 255.0
}