v/examples/sokol_examples/fonts2.v

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2020-01-16 20:45:47 +01:00
import sokol
import sokol.sapp
import sokol.gfx
import sokol.sgl
import sokol.sfons
import fontstash
import os
import time
import filepath
#define FONS_USE_FREETYPE 1
struct AppState {
mut:
pass_action C.sg_pass_action
fons &C.FONScontext
font_normal int
}
fn main() {
mut color_action := sg_color_attachment_action {
action: C.SG_ACTION_CLEAR
}
color_action.val[0] = 0.3
color_action.val[1] = 0.3
color_action.val[2] = 0.32
color_action.val[3] = 1.0
mut pass_action := sg_pass_action{}
pass_action.colors[0] = color_action
state := &AppState{
pass_action: pass_action
fons: &C.FONScontext(0)
}
desc := sapp_desc{
user_data: state
init_userdata_cb: init
frame_userdata_cb: frame
window_title: 'V Metal/GL Text Rendering'.str
}
sapp.run(&desc)
}
fn init(user_data voidptr) {
mut state := &AppState(user_data)
// dont actually alocate this on the heap in real life
gfx.setup(&sg_desc {
mtl_device: C.sapp_metal_get_device()
mtl_renderpass_descriptor_cb: sapp_metal_get_renderpass_descriptor
mtl_drawable_cb: sapp_metal_get_drawable
d3d11_device: sapp_d3d11_get_device()
d3d11_device_context: sapp_d3d11_get_device_context()
d3d11_render_target_view_cb: sapp_d3d11_get_render_target_view
d3d11_depth_stencil_view_cb: sapp_d3d11_get_depth_stencil_view
})
s := &C.sgl_desc_t{}
C.sgl_setup(s)
state.fons = C.sfons_create(512, 512, 1)
//mut font_path := cfg.font_path
//if font_path == '' {
mut font_path := 'RobotoMono-Regular.ttf'
//}
if !os.exists(font_path) {
exe_path := os.executable()
exe_dir := filepath.basedir(exe_path)
font_path = filepath.basedir(exe_dir) + '/tetris/$font_path'
println(font_path)
}
if !os.exists(font_path) {
println('failed to load $font_path')
return
}
if bytes := os.read_bytes(font_path) {
println('loaded font: $bytes.len')
state.font_normal = C.fonsAddFontMem(state.fons, "sans", bytes.data, bytes.len, false)
}
}
fn frame(user_data voidptr) {
t:=time.ticks()
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()
//println(time.ticks()-t)
}
fn (state &AppState) render_font() {
mut sx := 0.0
mut sy := 0.0
mut dx := 0.0
mut dy := 0.0
lh := 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 := 0.0
descender := 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)
fonsSetFont(state.fons, state.font_normal)
fonsSetSize(state.fons, 48.0)
fonsSetColor(state.fons, brown)
dx = fonsDrawText(state.fons, dx, dy, c"brown ", C.NULL)
fonsSetFont(state.fons, state.font_normal)
fonsSetSize(state.fons, 24.0)
fonsSetColor(state.fons, white)
dx = fonsDrawText(state.fons, dx, dy, c"fox ", C.NULL)
dx = sx
dy += lh * 1.2
fonsSetSize(state.fons, 20.0)
fonsSetFont(state.fons, state.font_normal)
fonsSetColor(state.fons, blue)
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
fonsSetAlign(state.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_BASELINE)
fonsSetSize(state.fons, 60.0)
fonsSetFont(state.fons, state.font_normal)
fonsSetColor(state.fons, white)
fonsSetSpacing(state.fons, 5.0)
fonsSetBlur(state.fons, 6.0)
fonsDrawText(state.fons, dx, dy, c"Blurry...", C.NULL)
dx = 300
dy += 50.0
fonsSetSize(state.fons, 28.0)
fonsSetFont(state.fons, state.font_normal)
fonsSetColor(state.fons, white)
fonsSetSpacing(state.fons, 0.0)
fonsSetBlur(state.fons, 3.0)
fonsDrawText(state.fons, dx,dy + 2, c"DROP SHADOW", C.NULL)
fonsSetColor(state.fons, black)
fonsSetBlur(state.fons, 0)
fonsDrawText(state.fons, dx,dy, c"DROP SHADOW", C.NULL)
fonsSetSize(state.fons, 18.0)
fonsSetFont(state.fons, state.font_normal)
fonsSetColor(state.fons, white)
dx = 50
dy = 350
line(dx-10,dy,dx+250,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(dx,dy-30,dx,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()
}