mirror of
https://github.com/vlang/v.git
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116 lines
2.6 KiB
V
116 lines
2.6 KiB
V
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license that can be found in the LICENSE file.
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module gg
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import sokol.sfons
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import gx
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import os
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const (
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default_font_size = 16
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)
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struct FT {
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pub:
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fons &C.FONScontext
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font_normal int
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scale f32 = 1.0
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}
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struct FTConfig {
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font_path string
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scale f32 = 1.0
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font_size int
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}
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fn new_ft(c FTConfig) ?&FT{
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if c.font_path == '' {
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// Load default font
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}
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if c.font_path == '' || !os.exists(c.font_path) {
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println('failed to load font "$c.font_path"')
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return none
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}
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bytes := os.read_bytes(c.font_path) or {
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println('failed to load font "$c.font_path"')
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return none
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}
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fons := sfons.create(512, 512, 1)
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return &FT{
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fons : fons
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font_normal: C.fonsAddFontMem(fons, 'sans', bytes.data, bytes.len, false)
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scale: c.scale
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}
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}
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pub fn (ctx &Context) draw_text(x, y int, text string, cfg gx.TextCfg) {
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if !ctx.font_inited {
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return
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}
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ctx.ft.fons.set_font(ctx.ft.font_normal)
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scale := if ctx.ft.scale == 0 { f32(1) } else { ctx.ft.scale }
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size := if cfg.size == 0 { gg.default_font_size } else { cfg.size }
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ctx.ft.fons.set_size(scale * f32(size))
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if cfg.align == gx.align_right {
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C.fonsSetAlign(ctx.ft.fons, C.FONS_ALIGN_RIGHT | C.FONS_ALIGN_TOP)
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}
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else {
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C.fonsSetAlign(ctx.ft.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_TOP)
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}
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color := C.sfons_rgba(cfg.color.r, cfg.color.g, cfg.color.b, 255)
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C.fonsSetColor(ctx.ft.fons, color)
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ascender := f32(0.0)
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descender := f32(0.0)
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lh := f32(0.0)
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ctx.ft.fons.vert_metrics(&ascender, &descender, &lh)
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C.fonsDrawText(ctx.ft.fons, x*scale, y*scale, text.str, 0) // TODO: check offsets/alignment
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}
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pub fn (ctx &Context) draw_text_def(x, y int, text string) {
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cfg := gx.TextCfg {
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color: gx.black
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size: default_font_size
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align: gx.align_left
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}
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ctx.draw_text(x, y, text, cfg)
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}
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/*
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pub fn (mut gg FT) init_font() {
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}
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*/
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pub fn (ft &FT) flush(){
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sfons.flush(ft.fons)
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}
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pub fn (ctx &Context) text_width(s string) int {
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if !ctx.font_inited {
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return 0
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}
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mut buf := [4]f32
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C.fonsTextBounds(ctx.ft.fons, 0, 0, s.str, 0, buf)
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return int((buf[2] - buf[0]) / ctx.scale)
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}
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pub fn (ctx &Context) text_height(s string) int {
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if !ctx.font_inited {
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return 0
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}
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mut buf := [4]f32
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C.fonsTextBounds(ctx.ft.fons, 0, 0, s.str, 0, buf)
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return int((buf[3] - buf[1]) / ctx.scale)
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}
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pub fn (ctx &Context) text_size(s string) (int, int) {
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if !ctx.font_inited {
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return 0,0
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}
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mut buf := [4]f32
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C.fonsTextBounds(ctx.ft.fons, 0, 0, s.str, 0, buf)
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return int((buf[2] - buf[0]) / ctx.scale), int((buf[3] - buf[1]) / ctx.scale)
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}
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