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v/vlib/gg/ft/ft.v

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module ft
import sokol.sfons
import gx
import os
const (
default_font_size = 20
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)
// TODO remove globals
/*
__global g_fons &C.FONScontext
__global g_font_normal int
__global g_font_path string
*/
pub struct FT {
pub:
fons &C.FONScontext
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font_normal int
scale f32 = 1.0
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}
pub struct Config {
font_path string
scale f32 = 1.0
font_size int
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}
pub fn new(c Config) ?&FT{
if c.font_path == '' {
// Load default font
}
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if c.font_path == '' || !os.exists(c.font_path) {
println('failed to load font "$c.font_path"')
return none
}
bytes := os.read_bytes(c.font_path) or {
println('failed to load font "$c.font_path"')
return none
}
fons := sfons.create(512, 512, 1)
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return &FT{
fons : fons
font_normal: C.fonsAddFontMem(fons, 'sans', bytes.data, bytes.len, false)
scale: c.scale
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}
}
pub fn (ft &FT) draw_text(x, y int, text string, cfg gx.TextCfg) {
ft.fons.set_font(ft.font_normal)
ft.fons.set_size(2.0 * ft.scale * f32(cfg.size))
C.fonsSetAlign(ft.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_TOP)
color := C.sfons_rgba(cfg.color.r, cfg.color.g, cfg.color.b, 255)
C.fonsSetColor(ft.fons, color)
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ascender := f32(0.0)
descender := f32(0.0)
lh := f32(0.0)
ft.fons.vert_metrics(&ascender, &descender, &lh)
C.fonsDrawText(ft.fons, x, y, text.str, 0) // TODO: check offsets/alignment
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}
pub fn (ft &FT) draw_text_def(x, y int, text string) {
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cfg := gx.TextCfg {
color: gx.black
size: default_font_size
align: gx.align_left
}
ft.draw_text(x, y, text, cfg)
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}
pub fn (mut gg FT) init_font() {
// TODO
////gg.fons =g_fons
//gg.font_normal=g_font_normal
}
pub fn (ft &FT) flush(){
sfons.flush(ft.fons)
}