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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "image" | ||
| "image/color" | ||
| "sync" | ||
|
|
||
| "github.com/sgreben/yeetgif/pkg/gifstatic" | ||
|
|
||
| "github.com/fogleman/gg" | ||
| "github.com/golang/freetype/truetype" | ||
|
|
||
| cli "github.com/jawher/mow.cli" | ||
| "github.com/sgreben/yeetgif/pkg/gifcmd" | ||
| "github.com/sgreben/yeetgif/pkg/imaging" | ||
| ) | ||
|
|
||
| var ( | ||
| font, _ = truetype.Parse(gifstatic.RobotoTTF) | ||
| ) | ||
|
|
||
| func CommandText(cmd *cli.Cmd) { | ||
| cmd.Spec = "[OPTIONS] [TEXT]" | ||
| var ( | ||
| a = gifcmd.Float{Value: 0.7} | ||
| s = gifcmd.Float{Value: 18.5} | ||
| y = gifcmd.Float{Value: 0.30} | ||
| padY = gifcmd.Float{Value: 3} | ||
| ) | ||
| cmd.VarOpt("a background-alpha", &a, "") | ||
| cmd.VarOpt("s font-size", &s, "") | ||
| cmd.VarOpt("y text-y", &y, "") | ||
| cmd.VarOpt("p background-padding", &padY, "") | ||
| text := cmd.StringArg("TEXT", "#yeetgif", "") | ||
| cmd.Action = func() { | ||
| Text(images, a.Value, padY.Value, s.Value, y.Value, *text) | ||
| } | ||
| } | ||
|
|
||
| func Text(images []image.Image, alpha, padY, sizePoints, textYFactor float64, text string) { | ||
| fontFace := truetype.NewFace(font, &truetype.Options{Size: sizePoints}) | ||
| var fontMutex sync.Mutex | ||
| padYBottomExtra := 6.0 | ||
| write := func(i int) { | ||
| w, h := images[i].Bounds().Dx(), images[i].Bounds().Dy() | ||
| ctx := gg.NewContext(w, h) | ||
| ctx.SetFontFace(fontFace) | ||
| ctx.SetColor(color.White) | ||
| fontMutex.Lock() | ||
| _, textHeight := ctx.MeasureString(text) | ||
| textY := float64(h) * (1 - textYFactor) | ||
| ctx.DrawStringAnchored(text, float64(w)/2, textY, 0.5, 0.5) | ||
| fontMutex.Unlock() | ||
| textBackgroundHeight := textHeight + 2*padY + padYBottomExtra | ||
| textBackgroundY := textY - (textBackgroundHeight-padYBottomExtra)/2 | ||
| textBackground := imaging.New(w, int(textBackgroundHeight), color.Black) | ||
| images[i] = imaging.Overlay(images[i], textBackground, image.Point{Y: int(textBackgroundY)}, alpha) | ||
| images[i] = imaging.Overlay(images[i], ctx.Image(), image.ZP, 1.0) | ||
| } | ||
| parallel(len(images), write) | ||
| } |
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