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package main
import (
"image/color"
"github.com/fogleman/gg"
)
const (
W = 1024
H = 512
)
func main() {
dc := gg.NewContext(W, H)
// draw text
dc.SetRGB(0, 0, 0)
dc.LoadFontFace("/Library/Fonts/Impact.ttf", 128)
dc.DrawStringAnchored("Gradient Text", W/2, H/2, 0.5, 0.5)
// get the context as an alpha mask
mask := dc.AsMask()
// clear the context
dc.SetRGB(1, 1, 1)
dc.Clear()
// set a gradient
g := gg.NewLinearGradient(0, 0, W, H)
g.AddColorStop(0, color.RGBA{255, 0, 0, 255})
g.AddColorStop(1, color.RGBA{0, 0, 255, 255})
dc.SetFillStyle(g)
// using the mask, fill the context with the gradient
dc.SetMask(mask)
dc.DrawRectangle(0, 0, W, H)
dc.Fill()
dc.SavePNG("out.png")
}
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