90 lines
1.6 KiB
Go
90 lines
1.6 KiB
Go
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package render
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import (
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"github.com/veandco/go-sdl2/sdl"
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"github.com/veandco/go-sdl2/ttf"
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)
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var fonts map[int]*ttf.Font = map[int]*ttf.Font{}
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// LoadFont loads and caches the font at a given size.
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func LoadFont(size int) (*ttf.Font, error) {
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if font, ok := fonts[size]; ok {
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return font, nil
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}
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font, err := ttf.OpenFont("./fonts/DejaVuSansMono.ttf", size)
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if err != nil {
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return nil, err
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}
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fonts[size] = font
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return font, nil
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}
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// TextConfig are settings for rendered text.
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type TextConfig struct {
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Text string
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Size int
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Color sdl.Color
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StrokeColor sdl.Color
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X int32
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Y int32
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W int32
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H int32
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}
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// StrokedText draws text with a stroke color around it.
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func StrokedText(t TextConfig) {
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stroke := func(copy TextConfig, x, y int32) {
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copy.Color = t.StrokeColor
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copy.X += x
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copy.Y += y
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Text(copy)
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}
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stroke(t, -1, -1)
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stroke(t, -1, 0)
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stroke(t, -1, 1)
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stroke(t, 1, -1)
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stroke(t, 1, 0)
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stroke(t, 1, 1)
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stroke(t, 0, -1)
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stroke(t, 0, 1)
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Text(t)
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}
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// Text draws text on the renderer.
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func Text(t TextConfig) error {
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var (
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font *ttf.Font
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surface *sdl.Surface
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tex *sdl.Texture
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err error
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)
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if font, err = LoadFont(t.Size); err != nil {
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return err
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}
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if surface, err = font.RenderUTF8Blended(t.Text, t.Color); err != nil {
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return err
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}
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defer surface.Free()
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if tex, err = Renderer.CreateTextureFromSurface(surface); err != nil {
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return err
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}
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defer tex.Destroy()
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Renderer.Copy(tex, nil, &sdl.Rect{
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X: int32(t.X),
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Y: int32(t.Y),
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W: int32(surface.W),
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H: int32(surface.H),
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})
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return nil
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}
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