32 lines
713 B
Go
32 lines
713 B
Go
package colors
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import (
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"image"
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_ "image/jpeg"
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"runtime"
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"github.com/mandykoh/prism"
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"github.com/mandykoh/prism/displayp3"
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"github.com/mandykoh/prism/srgb"
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)
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// ToSRGB converts an image to sRGB colors.
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func ToSRGB(img image.Image, profile Profile) image.Image {
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switch profile {
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case ProfileDisplayP3:
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in := prism.ConvertImageToNRGBA(img, runtime.NumCPU())
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out := image.NewNRGBA(in.Rect)
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for i := in.Rect.Min.Y; i < in.Rect.Max.Y; i++ {
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for j := in.Rect.Min.X; j < in.Rect.Max.X; j++ {
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inCol, alpha := displayp3.ColorFromNRGBA(in.NRGBAAt(j, i))
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outCol := srgb.ColorFromXYZ(inCol.ToXYZ())
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out.SetNRGBA(j, i, outCol.ToNRGBA(alpha))
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}
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}
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return out
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default:
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return img
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}
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}
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