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import sokol
import sokol.sapp
import sokol.gfx
import sokol.sgl
import sokol.sfons
import os
struct AppState {
mut:
pass_action C.sg_pass_action
fons &C.FONScontext
font_normal int
}
fn main() {
mut color_action := C.sg_color_attachment_action{
action: gfx.Action(C.SG_ACTION_CLEAR)
value: C.sg_color{
r: 0.3
g: 0.3
b: 0.32
a: 1.0
}
}
mut pass_action := C.sg_pass_action{}
pass_action.colors[0] = color_action
state := &AppState{
pass_action: pass_action
fons: &C.FONScontext(0)
}
title := 'V Metal/GL Text Rendering'
desc := C.sapp_desc{
user_data: state
init_userdata_cb: init
frame_userdata_cb: frame
window_title: title.str
html5_canvas_name: title.str
}
sapp.run(&desc)
}
fn init(mut state AppState) {
desc := sapp.create_desc()
gfx.setup(&desc)
s := &C.sgl_desc_t{}
C.sgl_setup(s)
state.fons = sfons.create(512, 512, 1)
// or use DroidSerif-Regular.ttf
if bytes := os.read_bytes(os.resource_abs_path('../assets/fonts/RobotoMono-Regular.ttf')) {
println('loaded font: $bytes.len')
state.font_normal = C.fonsAddFontMem(state.fons, c'sans', bytes.data, bytes.len,
false)
}
}
fn frame(user_data voidptr) {
mut state := &AppState(user_data)
state.render_font()
gfx.begin_default_pass(&state.pass_action, sapp.width(), sapp.height())
sgl.draw()
gfx.end_pass()
gfx.commit()
}
fn (state &AppState) render_font() {
mut sx := 0.0
mut sy := 0.0
mut dx := 0.0
mut dy := 0.0
lh := f32(0.0)
white := C.sfons_rgba(255, 255, 255, 255)
black := C.sfons_rgba(0, 0, 0, 255)
brown := C.sfons_rgba(192, 128, 0, 128)
blue := C.sfons_rgba(0, 192, 255, 255)
state.fons.clear_state()
sgl.defaults()
sgl.matrix_mode_projection()
sgl.ortho(0.0, f32(C.sapp_width()), f32(C.sapp_height()), 0.0, -1.0, 1.0)
sx = 0
sy = 50
dx = sx
dy = sy
state.fons.set_font(state.font_normal)
state.fons.set_size(100.0)
ascender := f32(0.0)
descender := f32(0.0)
state.fons.vert_metrics(&ascender, &descender, &lh)
dx = sx
dy += lh
C.fonsSetColor(state.fons, white)
dx = C.fonsDrawText(state.fons, dx, dy, c'The quick ', C.NULL)
C.fonsSetFont(state.fons, state.font_normal)
C.fonsSetSize(state.fons, 48.0)
C.fonsSetColor(state.fons, brown)
dx = C.fonsDrawText(state.fons, dx, dy, c'brown ', C.NULL)
C.fonsSetFont(state.fons, state.font_normal)
C.fonsSetSize(state.fons, 24.0)
C.fonsSetColor(state.fons, white)
dx = C.fonsDrawText(state.fons, dx, dy, c'fox ', C.NULL)
dx = sx
dy += lh * 1.2
C.fonsSetSize(state.fons, 20.0)
C.fonsSetFont(state.fons, state.font_normal)
C.fonsSetColor(state.fons, blue)
C.fonsDrawText(state.fons, dx, dy, c'Now is the time for all good men to come to the aid of the party.',
C.NULL)
dx = 300
dy = 350
C.fonsSetAlign(state.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_BASELINE)
C.fonsSetSize(state.fons, 60.0)
C.fonsSetFont(state.fons, state.font_normal)
C.fonsSetColor(state.fons, white)
C.fonsSetSpacing(state.fons, 5.0)
C.fonsSetBlur(state.fons, 6.0)
C.fonsDrawText(state.fons, dx, dy, c'Blurry...', C.NULL)
dx = 300
dy += 50.0
C.fonsSetSize(state.fons, 28.0)
C.fonsSetFont(state.fons, state.font_normal)
C.fonsSetColor(state.fons, white)
C.fonsSetSpacing(state.fons, 0.0)
C.fonsSetBlur(state.fons, 3.0)
C.fonsDrawText(state.fons, dx, dy + 2, c'DROP SHADOW', C.NULL)
C.fonsSetColor(state.fons, black)
C.fonsSetBlur(state.fons, 0)
C.fonsDrawText(state.fons, dx, dy, c'DROP SHADOW', C.NULL)
C.fonsSetSize(state.fons, 18.0)
C.fonsSetFont(state.fons, state.font_normal)
C.fonsSetColor(state.fons, white)
dx = 50
dy = 350
line(f32(dx - 10), f32(dy), f32(dx + 250), f32(dy))
C.fonsSetAlign(state.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_TOP)
dx = C.fonsDrawText(state.fons, dx, dy, c'Top', C.NULL)
dx += 10
C.fonsSetAlign(state.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_MIDDLE)
dx = C.fonsDrawText(state.fons, dx, dy, c'Middle', C.NULL)
dx += 10
C.fonsSetAlign(state.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_BASELINE)
dx = C.fonsDrawText(state.fons, dx, dy, c'Baseline', C.NULL)
dx += 10
C.fonsSetAlign(state.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_BOTTOM)
C.fonsDrawText(state.fons, dx, dy, c'Bottom', C.NULL)
dx = 150
dy = 400
line(f32(dx), f32(dy - 30), f32(dx), f32(dy + 80.0))
C.fonsSetAlign(state.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_BASELINE)
C.fonsDrawText(state.fons, dx, dy, c'Left', C.NULL)
dy += 30
C.fonsSetAlign(state.fons, C.FONS_ALIGN_CENTER | C.FONS_ALIGN_BASELINE)
C.fonsDrawText(state.fons, dx, dy, c'Center', C.NULL)
dy += 30
C.fonsSetAlign(state.fons, C.FONS_ALIGN_RIGHT | C.FONS_ALIGN_BASELINE)
C.fonsDrawText(state.fons, dx, dy, c'Right', C.NULL)
C.sfons_flush(state.fons)
}
fn line(sx f32, sy f32, ex f32, ey f32) {
sgl.begin_lines()
sgl.c4b(255, 255, 0, 128)
sgl.v2f(sx, sy)
sgl.v2f(ex, ey)
sgl.end()
}
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