57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
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package drawtool
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import (
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"git.kirsle.net/apps/doodle/pkg/native"
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"git.kirsle.net/go/render"
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"git.kirsle.net/go/ui"
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)
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// TextSettings holds currently selected Text Tool settings.
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type TextSettings struct {
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Font string // like 'DejaVuSans.ttf'
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Size int
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Message string
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Label *ui.Label // cached label texture
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}
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// Currently active settings (global variable)
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var TT TextSettings
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// IsZero checks if the TextSettings are populated.
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func (tt TextSettings) IsZero() bool {
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return tt.Font == "" && tt.Size == 0 && tt.Message == ""
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}
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// ToStroke converts a TextSettings configuration into a Freehand
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// Stroke, coloring in all of the pixels.
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func (tt TextSettings) ToStroke(e render.Engine, color render.Color, at render.Point) (*Stroke, error) {
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stroke := NewStroke(Freehand, color)
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// Render the text to a Go image so we can get the colors from
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// it uniformly.
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img, err := native.TextToImage(e, tt.Label.Font)
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if err != nil {
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return nil, err
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}
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// Pull all its pixels.
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var (
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max = img.Bounds().Max
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x = 0
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y = 0
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)
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for x = 0; x < max.X; x++ {
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for y = 0; y < max.Y; y++ {
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hue := img.At(x, y)
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r, g, b, _ := hue.RGBA()
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if r == 65535 && g == r && b == r {
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continue
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}
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stroke.Points = append(stroke.Points, render.NewPoint(x+at.X, y+at.Y))
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}
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}
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return stroke, nil
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}
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