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v/vlib/gg2/gg.v

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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module gg2
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import glm
import gx
import os
import sokol
import sokol.sapp
import sokol.sgl
import sokol.gfx
import sokol.sfons
const (
default_font_size = 24
)
pub struct Config {
pub:
width int
height int
use_ortho bool
retina bool
resizable bool
user_data voidptr
font_size int
font_path string
create_window bool
// window_user_ptr voidptr
window_title string
always_on_top bool
scale int
frame_fn fn(voidptr)
bg_color gx.Color
}
pub struct GG {
scale int // retina = 2 , normal = 1
pub mut:
width int
height int
clear_pass C.sg_pass_action
window C.sapp_desc
render_fn fn()
//////////// font fields
fons &C.FONScontext
font_normal int
}
// TODO remove globals
__global g_fons &C.FONScontext
__global g_font_normal int
__global g_font_path string
fn init_sokol_window() {
desc := sg_desc{
mtl_device: 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
}
gfx.setup(&desc)
sgl_desc := sgl_desc_t{}
sgl.setup(&sgl_desc)
g_fons = sfons.create(512, 512, 1)
if g_font_path.len == 0 || !os.exists(g_font_path) {
println('failed to load font "$g_font_path"')
return
}
bytes := os.read_bytes(g_font_path) or {
println('failed to load font "$g_font_path"')
return
}
g_font_normal = C.fonsAddFontMem(g_fons, 'sans', bytes.data, bytes.len, false)
}
pub fn new_context(cfg Config) &GG {
//C.printf('new_context() %p\n', cfg.user_data)
window := sapp_desc{
user_data: cfg.user_data
init_userdata_cb: init_sokol_window
frame_userdata_cb: cfg.frame_fn
window_title: cfg.window_title.str
html5_canvas_name: cfg.window_title.str
width: cfg.width
height: cfg.height
high_dpi: true
}
g_font_path = cfg.font_path
if cfg.use_ortho {}
else {}
return &GG{
width: cfg.width
height: cfg.height
window: window
clear_pass: gfx.create_clear_pass(f32(cfg.bg_color.r) / 255.0, f32(cfg.bg_color.g) / 255.0, f32(cfg.bg_color.b) / 255.0, 1.0)
scale: 1 // scale
fons:0
}
}
pub fn (gg &GG) draw_text(x, y int, text string, cfg gx.TextCfg) {
gg.fons.set_font(gg.font_normal)
gg.fons.set_size(cfg.size)
ascender := f32(0.0)
descender := f32(0.0)
lh := f32(0.0)
gg.fons.vert_metrics(&ascender, &descender, &lh)
color:= C.sfons_rgba(cfg.color.r, cfg.color.g, cfg.color.b, 255)
C.fonsSetColor(gg.fons, color)
C.fonsDrawText(gg.fons, x, y, text.str, 0)
}
pub fn (ctx &GG) draw_text_def(x, y int, text string) {
cfg := gx.TextCfg {
color: gx.Black
size: default_font_size
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align: gx.align_left
}
ctx.draw_text(x, y, text, cfg)
}
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pub fn (mut gg GG) init_font() {
// TODO
gg.fons =g_fons
gg.font_normal=g_font_normal
}
pub fn (gg &GG) run() {
sapp.run(&gg.window)
}
pub fn (ctx &GG) draw_rect(x, y, w, h f32, c gx.Color) {
sgl.c4b(c.r, c.g, c.b, 128)
sgl.begin_quads()
sgl.v2f(x, y)
sgl.v2f(x + w, y)
sgl.v2f(x + w, y + h)
sgl.v2f(x, y + h)
sgl.end()
}
pub fn draw_rect(x, y, w, h f32, c gx.Color) {
sgl.c4b(c.r, c.g, c.b, 128)
sgl.begin_quads()
sgl.v2f(x, y)
sgl.v2f(x + w, y)
sgl.v2f(x + w, y + h)
sgl.v2f(x, y + h)
sgl.end()
}
pub fn (gg &GG) draw_empty_rect(x, y, w, h f32, c gx.Color) {
sgl.c4b(c.r, c.g, c.b, 128)
sgl.begin_line_strip()
sgl.v2f(x, y)
sgl.v2f(x + w, y)
sgl.v2f(x + w, y + h)
sgl.v2f(x, y + h)
sgl.v2f(x, y)
sgl.end()
}
pub fn create_image(file string) u32 {
// println('gg create image "$file"')
if !os.exists(file) {
println('gg create image no such file "$file"')
return u32(0)
}
// img := stbi.load(file)
// img.free()
return 0 // texture
}
pub fn create_image_from_memory(buf byteptr) u32 {
// texture := gl.gen_texture()
// img := stbi.load_from_memory(buf)
// img.free()
return 0 // texture
}
pub fn (gg &GG) begin() {
sgl.defaults()
sgl.matrix_mode_projection()
sgl.ortho(0.0, f32(sapp.width()), f32(sapp.height()), 0.0, -1.0, 1.0)
}
pub fn (gg &GG) end() {
gfx.begin_default_pass(gg.clear_pass, sapp.width(), sapp.height())
sgl.draw()
gfx.end_pass()
gfx.commit()
wait_events()
}
pub fn (ctx &GG) draw_line(x, y, x2, y2 f32, color gx.Color) {}
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fn C.WaitMessage()
pub fn wait_events() {
unsafe {
$if macos {
# NSEvent *event = [NSApp nextEventMatchingMask:NSEventMaskAny
# untilDate:[NSDate distantFuture]
# inMode:NSDefaultRunLoopMode
# dequeue:YES];
# [NSApp sendEvent:event];
}
$if windows {
C.WaitMessage()
}
}
}