v/vlib/gg/gg.v

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// 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
import gx
import os
import sokol
import sokol.sapp
import sokol.sgl
import sokol.gfx
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//import gg.ft
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type FNvoidptr1 fn(voidptr)
type FNvoidptr2 fn(voidptr,voidptr)
type FNFail fn(string,voidptr)
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pub struct Config {
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pub:
width int
height int
use_ortho bool
retina bool
resizable bool
user_data voidptr
font_size int
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create_window bool
// window_user_ptr voidptr
window_title string
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borderless_window bool
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always_on_top bool
bg_color gx.Color
init_fn FNvoidptr1 = voidptr(0)
frame_fn FNvoidptr1 = voidptr(0)
event_fn FNvoidptr2 = voidptr(0)
cleanup_fn FNvoidptr1 = voidptr(0)
fail_fn FNFail = voidptr(0)
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wait_events bool // set this to true for UIs, to save power
font_path string
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fullscreen bool
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}
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pub struct Context {
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pub mut:
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scale f32 = 1.0 // will get set to 2.0 for retina, will remain 1.0 for normal
width int
height int
clear_pass C.sg_pass_action
window C.sapp_desc
config Config
}
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pub struct Size { pub: width int height int }
fn gg_init_sokol_window(user_data voidptr) {
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mut g := &Context(user_data)
desc := C.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
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}
gfx.setup(&desc)
sgl_desc := C.sgl_desc_t{}
sgl.setup(&sgl_desc)
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g.scale = sapp.dpi_scale()
// NB: on older X11, `Xft.dpi` from ~/.Xresources, that sokol uses,
// may not be set which leads to sapp.dpi_scale reporting incorrectly 0.0
if g.scale < 0.1 {
g.scale = 1.0
}
is_high_dpi := sapp.high_dpi()
fb_w := sapp.width()
fb_h := sapp.height()
println('g.scale=$g.scale is_high_dpi=$is_high_dpi fb_w=$fb_w fb_h=$fb_h')
if g.config.init_fn != voidptr(0) {
g.config.init_fn( g.config.user_data )
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}
}
fn gg_frame_fn(user_data voidptr) {
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mut g := &Context(user_data)
if g.config.frame_fn != voidptr(0) {
g.config.frame_fn( g.config.user_data )
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}
}
fn gg_event_fn(e &C.sapp_event, user_data voidptr){
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mut g := &Context(user_data)
if g.config.event_fn != voidptr(0) {
g.config.event_fn(e, g.config.user_data)
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}
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}
fn gg_cleanup_fn(user_data voidptr){
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mut g := &Context(user_data)
if g.config.cleanup_fn != voidptr(0) {
g.config.cleanup_fn(g.config.user_data)
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}
}
fn gg_fail_fn(msg charptr, user_data voidptr){
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mut g := &Context(user_data)
vmsg := tos3(msg)
if g.config.fail_fn != voidptr(0) {
g.config.fail_fn(vmsg, g.config.user_data)
}else{
eprintln('gg error: $vmsg')
}
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}
//
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pub fn new_context(cfg Config) &Context{
mut g := &Context{
width: cfg.width
height: cfg.height
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)
config: cfg
}
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//C.printf('new_context() %p\n', cfg.user_data)
window := C.sapp_desc{
user_data: g
init_userdata_cb: gg_init_sokol_window
frame_userdata_cb: gg_frame_fn
event_userdata_cb: gg_event_fn
fail_userdata_cb: gg_fail_fn
cleanup_userdata_cb: gg_cleanup_fn
window_title: cfg.window_title.str
html5_canvas_name: cfg.window_title.str
width: cfg.width
height: cfg.height
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high_dpi: true
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fullscreen: cfg.fullscreen
}
if cfg.use_ortho {}
else {}
g.window = window
return g
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}
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pub fn (gg &Context) run() {
sapp.run(&gg.window)
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}
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pub fn (ctx &Context) 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 * ctx.scale, y * ctx.scale)
sgl.v2f((x + w) * ctx.scale, y * ctx.scale)
sgl.v2f((x + w) * ctx.scale, (y + h) * ctx.scale)
sgl.v2f(x * ctx.scale, (y + h) * ctx.scale)
sgl.end()
}
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pub fn (ctx &Context) draw_empty_rect(x, y, w, h f32, c gx.Color) {
sgl.c4b(c.r, c.g, c.b, 128)
sgl.begin_line_strip()
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if ctx.scale == 1 {
sgl.v2f(x, y)
sgl.v2f(x + w, y)
sgl.v2f(x + w, y + h)
sgl.v2f(x, y + h)
sgl.v2f(x, y)
}
else {
sgl.v2f(x * ctx.scale, y * ctx.scale)
sgl.v2f((x + w) * ctx.scale, y * ctx.scale)
sgl.v2f((x + w) * ctx.scale, (y + h) * ctx.scale)
sgl.v2f(x * ctx.scale, (y + h) * ctx.scale)
sgl.v2f(x*ctx.scale, y*ctx.scale)
}
sgl.end()
}
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pub fn create_image(file string) u32 {
// println('gg create image "$file"')
if !os.exists(file) {
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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
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}
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pub fn (gg &Context) begin() {
sgl.defaults()
sgl.matrix_mode_projection()
sgl.ortho(0.0, f32(sapp.width()), f32(sapp.height()), 0.0, -1.0, 1.0)
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}
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pub fn (gg &Context) end() {
gfx.begin_default_pass(gg.clear_pass, sapp.width(), sapp.height())
sgl.draw()
gfx.end_pass()
gfx.commit()
if gg.config.wait_events {
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//println('gg: waiting')
wait_events()
}
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}
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pub fn (ctx &Context) draw_line(x, y, x2, y2 f32, color gx.Color) {}
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()
}
}
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}