Sander Schobers
0652c02caf
Added Position and SetAsTarget method to Display. Display resize is automatically acknowledged.
66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
package allegro5
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// #include <allegro5/allegro.h>
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// #include <allegro5/allegro_font.h>
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// #include <allegro5/allegro_ttf.h>
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import "C"
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import (
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"fmt"
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"unsafe"
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)
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type Font struct {
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font *C.ALLEGRO_FONT
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}
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type HorizontalAlignment int
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const (
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AlignLeft HorizontalAlignment = iota
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AlignCenter
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AlignRight
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)
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func LoadTTFFont(path string, size int) (*Font, error) {
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p := C.CString(path)
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defer C.free(unsafe.Pointer(p))
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f := C.al_load_ttf_font(p, C.int(size), 0)
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if nil == f {
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return nil, fmt.Errorf("unable to load ttf font '%s'", path)
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}
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return &Font{f}, nil
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}
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func (f *Font) drawFlags(a HorizontalAlignment) C.int {
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switch a {
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case AlignLeft:
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return C.ALLEGRO_ALIGN_LEFT
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case AlignCenter:
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return C.ALLEGRO_ALIGN_CENTRE
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case AlignRight:
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return C.ALLEGRO_ALIGN_RIGHT
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}
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return C.ALLEGRO_ALIGN_LEFT
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}
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func (f *Font) Draw(left, top float32, color Color, align HorizontalAlignment, text string) {
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t := C.CString(text)
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defer C.free(unsafe.Pointer(t))
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flags := f.drawFlags(align)
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C.al_draw_text(f.font, color.color, C.float(left), C.float(top), flags, t)
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}
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func (f *Font) TextWidth(text string) float32 {
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t := C.CString(text)
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defer C.free(unsafe.Pointer(t))
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return float32(C.al_get_text_width(f.font, t))
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}
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func (f *Font) Destroy() {
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C.al_destroy_font(f.font)
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}
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