237 lines
6.4 KiB
V
237 lines
6.4 KiB
V
// Copyright (c) 2019-2022 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 fontstash
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import sokol.sfons
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import sokol.sgl
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import gx
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import os
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import os.font
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struct FT {
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pub:
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fons &fontstash.Context
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font_normal int
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font_bold int
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font_mono int
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font_italic int
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scale f32 = 1.0
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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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if c.bytes_normal.len > 0 {
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fons := sfons.create(512, 512, 1)
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bytes_normal := c.bytes_normal
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bytes_bold := if c.bytes_bold.len > 0 {
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c.bytes_bold
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} else {
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debug_font_println('setting bold variant to normal')
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bytes_normal
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}
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bytes_mono := if c.bytes_mono.len > 0 {
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c.bytes_mono
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} else {
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debug_font_println('setting mono variant to normal')
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bytes_normal
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}
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bytes_italic := if c.bytes_italic.len > 0 {
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c.bytes_italic
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} else {
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debug_font_println('setting italic variant to normal')
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bytes_normal
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}
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return &FT{
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fons: fons
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font_normal: fons.add_font_mem('sans', bytes_normal, false)
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font_bold: fons.add_font_mem('sans', bytes_bold, false)
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font_mono: fons.add_font_mem('sans', bytes_mono, false)
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font_italic: fons.add_font_mem('sans', bytes_italic, false)
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scale: c.scale
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}
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} else {
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// Load default font
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}
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}
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if c.font_path == '' || !os.exists(c.font_path) {
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$if !android {
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println('failed to load font "$c.font_path"')
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return none
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}
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}
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mut normal_path := c.font_path
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mut bytes := []u8{}
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$if android {
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// First try any filesystem paths
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bytes = os.read_bytes(c.font_path) or { []u8{} }
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if bytes.len == 0 {
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// ... then try the APK asset path
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bytes = os.read_apk_asset(c.font_path) or {
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println('failed to load font "$c.font_path"')
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return none
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}
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}
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} $else {
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bytes = os.read_bytes(c.font_path) or {
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println('failed to load font "$c.font_path"')
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return none
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}
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}
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mut bold_path := if c.custom_bold_font_path != '' {
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c.custom_bold_font_path
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} else {
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font.get_path_variant(c.font_path, .bold)
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}
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bytes_bold := os.read_bytes(bold_path) or {
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debug_font_println('failed to load font "$bold_path"')
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bold_path = c.font_path
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bytes
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}
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mut mono_path := font.get_path_variant(c.font_path, .mono)
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bytes_mono := os.read_bytes(mono_path) or {
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debug_font_println('failed to load font "$mono_path"')
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mono_path = c.font_path
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bytes
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}
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mut italic_path := font.get_path_variant(c.font_path, .italic)
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bytes_italic := os.read_bytes(italic_path) or {
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debug_font_println('failed to load font "$italic_path"')
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italic_path = c.font_path
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bytes
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}
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fons := sfons.create(512, 512, 1)
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debug_font_println('Font used for font_normal : $normal_path')
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debug_font_println('Font used for font_bold : $bold_path')
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debug_font_println('Font used for font_mono : $mono_path')
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debug_font_println('Font used for font_italic : $italic_path')
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return &FT{
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fons: fons
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font_normal: fons.add_font_mem('sans', bytes, false)
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font_bold: fons.add_font_mem('sans', bytes_bold, false)
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font_mono: fons.add_font_mem('sans', bytes_mono, false)
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font_italic: fons.add_font_mem('sans', bytes_italic, false)
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scale: c.scale
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}
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}
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// set_cfg sets the current text configuration
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pub fn (ctx &Context) set_cfg(cfg gx.TextCfg) {
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if !ctx.font_inited {
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return
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}
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if cfg.bold {
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ctx.ft.fons.set_font(ctx.ft.font_bold)
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} else if cfg.mono {
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ctx.ft.fons.set_font(ctx.ft.font_mono)
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} else if cfg.italic {
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ctx.ft.fons.set_font(ctx.ft.font_italic)
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} else {
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ctx.ft.fons.set_font(ctx.ft.font_normal)
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}
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scale := if ctx.ft.scale == 0 { f32(1) } else { ctx.ft.scale }
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size := if cfg.mono { cfg.size - 2 } else { cfg.size }
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ctx.ft.fons.set_size(scale * f32(size))
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ctx.ft.fons.set_align(int(cfg.align) | int(cfg.vertical_align))
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color := sfons.rgba(cfg.color.r, cfg.color.g, cfg.color.b, cfg.color.a)
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if cfg.color.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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ctx.ft.fons.set_color(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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}
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// draw_text draws the string in `text_` starting at top-left position `x`,`y`.
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// Text settings can be provided with `cfg`.
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pub fn (ctx &Context) draw_text(x int, y int, text_ string, cfg gx.TextCfg) {
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$if macos {
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if ctx.native_rendering {
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if cfg.align == gx.align_right {
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width := ctx.text_width(text_)
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C.darwin_draw_string(x - width, ctx.height - y, text_, cfg)
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} else {
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C.darwin_draw_string(x, ctx.height - y, text_, cfg)
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}
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return
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}
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}
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if !ctx.font_inited {
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eprintln('gg: draw_text(): font not initialized')
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return
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}
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// text := text_.trim_space() // TODO remove/optimize
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// mut text := text_
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// if text.contains('\t') {
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// text = text.replace('\t', ' ')
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// }
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ctx.set_cfg(cfg)
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scale := if ctx.ft.scale == 0 { f32(1) } else { ctx.ft.scale }
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ctx.ft.fons.draw_text(x * scale, y * scale, text_) // TODO: check offsets/alignment
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}
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// draw_text draws the string in `text_` starting at top-left position `x`,`y` using
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// default text settings.
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pub fn (ctx &Context) draw_text_def(x int, y int, text string) {
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ctx.draw_text(x, y, text)
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}
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// flush prepares the font for use.
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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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// text_width returns the width of the `string` `s` in pixels.
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pub fn (ctx &Context) text_width(s string) int {
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$if macos {
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if ctx.native_rendering {
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return C.darwin_text_width(s)
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}
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}
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// ctx.set_cfg(cfg) TODO
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if !ctx.font_inited {
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return 0
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}
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mut buf := [4]f32{}
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ctx.ft.fons.text_bounds(0, 0, s, &buf[0])
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if s.ends_with(' ') {
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return int((buf[2] - buf[0]) / ctx.scale) +
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ctx.text_width('i') // TODO fix this in fontstash?
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}
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res := int((buf[2] - buf[0]) / ctx.scale)
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// println('TW "$s" = $res')
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$if macos {
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if ctx.native_rendering {
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return res * 2
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}
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}
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return int((buf[2] - buf[0]) / ctx.scale)
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}
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// text_height returns the height of the `string` `s` in pixels.
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pub fn (ctx &Context) text_height(s string) int {
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// ctx.set_cfg(cfg) TODO
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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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ctx.ft.fons.text_bounds(0, 0, s, &buf[0])
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return int((buf[3] - buf[1]) / ctx.scale)
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}
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// text_size returns the width and height of the `string` `s` in pixels.
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pub fn (ctx &Context) text_size(s string) (int, int) {
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// ctx.set_cfg(cfg) TODO
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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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ctx.ft.fons.text_bounds(0, 0, s, &buf[0])
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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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