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Added support for (horizontally) aligment on text rendering.

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This commit is contained in:
Sander Schobers 2020-05-10 10:57:00 +02:00
parent 69c8ae72f3
commit 8e2b80395d
1 changed files with 27 additions and 1 deletions
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28
fonts.go
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@ -8,12 +8,20 @@ import (
"opslag.de/schobers/fs/vfs"
)
type TextAlignment int
const (
TextAlignmentLeft TextAlignment = iota
TextAlignmentCenter
TextAlignmentRight
)
type Font struct {
*ttf.Font
}
func (f *Font) Render(renderer *sdl.Renderer, text string, pos Point, color sdl.Color) (*Texture, error) {
surface, err := f.RenderUTF8Solid(text, color)
surface, err := f.RenderUTF8Blended(text, color)
if err != nil {
return nil, err
}
@ -25,6 +33,24 @@ func (f *Font) Render(renderer *sdl.Renderer, text string, pos Point, color sdl.
return texture, nil
}
func (f *Font) RenderCopyAlign(renderer *sdl.Renderer, text string, pos Point, color sdl.Color, align TextAlignment) error {
texture, err := f.Render(renderer, text, pos, color)
if err != nil {
return err
}
defer texture.Destroy()
rect := texture.Rect()
switch align {
case TextAlignmentLeft:
texture.Copy(renderer, &sdl.Rect{X: pos.X, Y: pos.Y, W: rect.W, H: rect.H})
case TextAlignmentCenter:
texture.Copy(renderer, &sdl.Rect{X: pos.X - (rect.W / 2), Y: pos.Y, W: rect.W, H: rect.H})
case TextAlignmentRight:
texture.Copy(renderer, &sdl.Rect{X: pos.X - rect.W, Y: pos.Y, W: rect.W, H: rect.H})
}
return nil
}
func (f *Font) RenderCopy(renderer *sdl.Renderer, text string, pos Point, color sdl.Color) error {
texture, err := f.Render(renderer, text, pos, color)
if err != nil {