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package cairo
// #include <stdlib.h>
// #include <cairo.h>
// #include <cairo-gobject.h>
import "C"
import (
"unsafe"
)
// FontSlant is a representation of Cairo's cairo_font_slant_t
type FontSlant int
const (
FONT_SLANT_NORMAL FontSlant = C.CAIRO_FONT_SLANT_NORMAL
FONT_SLANT_ITALIC FontSlant = C.CAIRO_FONT_SLANT_ITALIC
FONT_SLANT_OBLIQUE FontSlant = C.CAIRO_FONT_SLANT_OBLIQUE
)
// FontWeight is a representation of Cairo's cairo_font_weight_t
type FontWeight int
const (
FONT_WEIGHT_NORMAL FontWeight = C.CAIRO_FONT_WEIGHT_NORMAL
FONT_WEIGHT_BOLD FontWeight = C.CAIRO_FONT_WEIGHT_BOLD
)
func (v *Context) SelectFontFace(family string, slant FontSlant, weight FontWeight) {
cstr := C.CString(family)
defer C.free(unsafe.Pointer(cstr))
C.cairo_select_font_face(v.native(), (*C.char)(cstr), C.cairo_font_slant_t(slant), C.cairo_font_weight_t(weight))
}
func (v *Context) SetFontSize(size float64) {
C.cairo_set_font_size(v.native(), C.double(size))
}
// TODO: cairo_set_font_matrix
// TODO: cairo_get_font_matrix
// TODO: cairo_set_font_options
// TODO: cairo_get_font_options
// TODO: cairo_set_font_face
// TODO: cairo_get_font_face
// TODO: cairo_set_scaled_font
// TODO: cairo_get_scaled_font
func (v *Context) ShowText(utf8 string) {
cstr := C.CString(utf8)
defer C.free(unsafe.Pointer(cstr))
C.cairo_show_text(v.native(), (*C.char)(cstr))
}
// TODO: cairo_show_glyphs
// TODO: cairo_show_text_glyphs
type FontExtents struct {
Ascent float64
Descent float64
Height float64
MaxXAdvance float64
MaxYAdvance float64
}
func (v *Context) FontExtents() FontExtents {
var extents C.cairo_font_extents_t
C.cairo_font_extents(v.native(), &extents)
return FontExtents{
Ascent: float64(extents.ascent),
Descent: float64(extents.descent),
Height: float64(extents.height),
MaxXAdvance: float64(extents.max_x_advance),
MaxYAdvance: float64(extents.max_y_advance),
}
}
type TextExtents struct {
XBearing float64
YBearing float64
Width float64
Height float64
XAdvance float64
YAdvance float64
}
func (v *Context) TextExtents(utf8 string) TextExtents {
cstr := C.CString(utf8)
defer C.free(unsafe.Pointer(cstr))
var extents C.cairo_text_extents_t
C.cairo_text_extents(v.native(), (*C.char)(cstr), &extents)
return TextExtents{
XBearing: float64(extents.x_bearing),
YBearing: float64(extents.y_bearing),
Width: float64(extents.width),
Height: float64(extents.height),
XAdvance: float64(extents.x_advance),
YAdvance: float64(extents.y_advance),
}
}
// TODO: cairo_glyph_extents
// TODO: cairo_toy_font_face_create
// TODO: cairo_toy_font_face_get_family
// TODO: cairo_toy_font_face_get_slant
// TODO: cairo_toy_font_face_get_weight
// TODO: cairo_glyph_allocate
// TODO: cairo_glyph_free
// TODO: cairo_text_cluster_allocate
// TODO: cairo_text_cluster_free
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