/
font.go
141 lines (94 loc) · 2.63 KB
/
font.go
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package allegro
/*
#cgo pkg-config: allegro_font-5.0
#include <allegro5/allegro.h>
#include <allegro5/allegro_font.h>
*/
import "C"
import "unsafe"
import "reflect"
type Font C.ALLEGRO_FONT
const (
ALIGN_LEFT = C.ALLEGRO_ALIGN_LEFT
ALIGN_RIGHT = C.ALLEGRO_ALIGN_RIGHT
ALIGN_CENTER = C.ALLEGRO_ALIGN_CENTER
ALIGN_INTEGER = C.ALLEGRO_ALIGN_INTEGER
)
func InitFont() {
C.al_init_font_addon()
}
func ShutdownFont() {
C.al_shutdown_font_addon()
}
func LoadFont(fname string, size, flags int) *Font {
cfname := C.CString(fname)
defer C.free(unsafe.Pointer(cfname))
var f *Font
f = (*Font)(C.al_load_font(cfname, C.int(size), C.int(flags)))
return f
}
func (f *Font) Destroy() {
C.al_destroy_font((*C.ALLEGRO_FONT)(f))
}
func (f *Font) GetLineHeight() int {
var i int
i = int(C.al_get_font_line_height((*C.ALLEGRO_FONT)(f)))
return i
}
func (f *Font) GetAscent() int {
var i int
i = int(C.al_get_font_ascent((*C.ALLEGRO_FONT)(f)))
return i
}
func (f *Font) GetDescent() int {
var d int
d = int(C.al_get_font_descent((*C.ALLEGRO_FONT)(f)))
return d
}
func (f *Font) GetTextWidth(text string) int {
ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
var i int
i = int(C.al_get_text_width((*C.ALLEGRO_FONT)(f), ctext))
return i
}
func (f *Font) Draw(color Color, x, y float32, flags int, text string) {
ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
C.al_draw_text((*C.ALLEGRO_FONT)(f), (C.ALLEGRO_COLOR)(color),
C.float(x), C.float(y), C.int(flags), ctext)
}
func (f *Font) DrawJustified(color Color, x1, x2, y, diff float32, flags int, text string) {
ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
C.al_draw_justified_text((*C.ALLEGRO_FONT)(f), C.ALLEGRO_COLOR(color),
C.float(x1), C.float(x2), C.float(y), C.float(diff), C.int(flags), ctext)
}
func (f *Font) GetTextDimensions(text string) (int, int, int, int) {
ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
var x, y, w, h C.int
C.al_get_text_dimensions((*C.ALLEGRO_FONT)(f), ctext,
&x, &y, &w, &h)
return int(x), int(y), int(w), int(h)
}
func GrabFontFromBitmap(bmp *Bitmap, ranges []int) *Font {
n := len(ranges) / 2 * 2
data := (*reflect.SliceHeader)(unsafe.Pointer(&ranges)).Data
var f *Font
f = (*Font)(C.al_grab_font_from_bitmap((*C.ALLEGRO_BITMAP)(bmp),
C.int(n), (*C.int)(unsafe.Pointer(data))))
return f
}
func LoadBitmapFont(fname string) *Font {
cfname := C.CString(fname)
defer C.free(unsafe.Pointer(cfname))
var f *Font
f = (*Font)(C.al_load_bitmap_font(cfname))
return f
}
func CreateBuiltinFont() *Font {
var f *Font
f = (*Font)(C.al_create_builtin_font())
return f
}