452 lines
11 KiB
V
452 lines
11 KiB
V
// 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
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import os
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import gx
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import sokol
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import sokol.sapp
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import sokol.sgl
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import sokol.gfx
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import math
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// import time
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pub type FNCb = fn (x voidptr)
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pub type FNEvent = fn (e voidptr, x voidptr)
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pub type FNFail = fn (msg string, x voidptr)
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pub type FNKeyDown = fn (c sapp.KeyCode, m sapp.Modifier, x voidptr)
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pub type FNMove = fn (x f32, y f32, z voidptr)
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pub type FNChar = fn (c u32, x voidptr)
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pub struct Config {
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pub:
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width int
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height int
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use_ortho bool
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retina bool
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resizable bool
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user_data voidptr
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font_size int
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create_window bool
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// window_user_ptr voidptr
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window_title string
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borderless_window bool
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always_on_top bool
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bg_color gx.Color
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init_fn FNCb = voidptr(0)
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frame_fn FNCb = voidptr(0)
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cleanup_fn FNCb = voidptr(0)
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fail_fn FNFail = voidptr(0)
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event_fn FNEvent = voidptr(0)
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keydown_fn FNKeyDown = voidptr(0)
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// special case of event_fn
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char_fn FNChar = voidptr(0)
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// special case of event_fn
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move_fn FNMove = voidptr(0)
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// special case of event_fn
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click_fn FNMove = voidptr(0)
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// special case of event_fn
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wait_events bool // set this to true for UIs, to save power
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fullscreen bool
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scale f32 = 1.0
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// vid needs this
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// init_text bool
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font_path string
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}
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pub struct Context {
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render_text bool
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mut:
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// a cache with all images created by the user. used for sokol image init and to save space
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// (so that the user can store image ids, not entire Image objects)
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image_cache []Image
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pub mut:
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scale f32 = 1.0
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// will get set to 2.0 for retina, will remain 1.0 for normal
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width int
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height int
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clear_pass C.sg_pass_action
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window C.sapp_desc
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timage_pip C.sgl_pipeline
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config Config
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ft &FT
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font_inited bool
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}
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pub struct Size {
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pub:
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width int
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height int
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}
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fn gg_init_sokol_window(user_data voidptr) {
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mut g := &Context(user_data)
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desc := sapp.create_desc()
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/*
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desc := C.sg_desc{
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mtl_device: sapp.metal_get_device()
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mtl_renderpass_descriptor_cb: sapp.metal_get_renderpass_descriptor
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mtl_drawable_cb: sapp.metal_get_drawable
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d3d11_device: sapp.d3d11_get_device()
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d3d11_device_context: sapp.d3d11_get_device_context()
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d3d11_render_target_view_cb: sapp.d3d11_get_render_target_view
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d3d11_depth_stencil_view_cb: sapp.d3d11_get_depth_stencil_view
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}
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*/
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gfx.setup(&desc)
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sgl_desc := C.sgl_desc_t{}
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sgl.setup(&sgl_desc)
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g.scale = sapp.dpi_scale()
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// NB: on older X11, `Xft.dpi` from ~/.Xresources, that sokol uses,
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// may not be set which leads to sapp.dpi_scale reporting incorrectly 0.0
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if g.scale < 0.1 {
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g.scale = 1.0
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}
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// is_high_dpi := sapp.high_dpi()
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// fb_w := sapp.width()
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// fb_h := sapp.height()
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// println('g.scale=$g.scale is_high_dpi=$is_high_dpi fb_w=$fb_w fb_h=$fb_h')
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// if g.config.init_text {
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// `os.is_file()` won't work on Android if the font file is embedded into the APK
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exists := $if !android { os.is_file(g.config.font_path) } $else { true }
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if g.config.font_path != '' && exists {
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// t := time.ticks()
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g.ft = new_ft({
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font_path: g.config.font_path
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scale: sapp.dpi_scale()
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}) or {
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panic(err)
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}
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// println('FT took ${time.ticks()-t} ms')
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g.font_inited = true
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}
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//
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mut pipdesc := C.sg_pipeline_desc{}
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unsafe {C.memset(&pipdesc, 0, sizeof(pipdesc))}
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pipdesc.blend.enabled = true
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pipdesc.blend.src_factor_rgb = C.SG_BLENDFACTOR_SRC_ALPHA
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pipdesc.blend.dst_factor_rgb = C.SG_BLENDFACTOR_ONE_MINUS_SRC_ALPHA
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g.timage_pip = sgl.make_pipeline(&pipdesc)
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//
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if g.config.init_fn != voidptr(0) {
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g.config.init_fn(g.config.user_data)
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}
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// Create images now that we can do that after sg is inited
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for i in 0 .. g.image_cache.len {
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g.image_cache[i].init_sokol_image()
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}
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}
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fn gg_frame_fn(user_data voidptr) {
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mut g := &Context(user_data)
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if g.config.frame_fn != voidptr(0) {
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g.config.frame_fn(g.config.user_data)
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}
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}
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fn gg_event_fn(ce &C.sapp_event, user_data voidptr) {
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e := &sapp.Event(ce)
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mut g := &Context(user_data)
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if g.config.event_fn != voidptr(0) {
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g.config.event_fn(e, g.config.user_data)
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}
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match e.typ {
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.key_down {
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if g.config.keydown_fn != voidptr(0) {
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kdfn := g.config.keydown_fn
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kdfn(e.key_code, e.modifiers, g.config.user_data)
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}
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}
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.char {
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if g.config.char_fn != voidptr(0) {
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cfn := g.config.char_fn
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cfn(e.char_code, g.config.user_data)
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}
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}
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.mouse_move {
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if g.config.move_fn != voidptr(0) {
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cfn := g.config.move_fn
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cfn(e.mouse_x / g.scale, e.mouse_y / g.scale, g.config.user_data)
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}
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}
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.mouse_down {
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if g.config.click_fn != voidptr(0) {
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cfn := g.config.click_fn
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cfn(e.mouse_x / g.scale, e.mouse_y / g.scale, g.config.user_data)
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}
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}
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else {}
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}
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}
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fn gg_cleanup_fn(user_data voidptr) {
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mut g := &Context(user_data)
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if g.config.cleanup_fn != voidptr(0) {
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g.config.cleanup_fn(g.config.user_data)
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}
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}
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fn gg_fail_fn(msg charptr, user_data voidptr) {
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mut g := &Context(user_data)
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vmsg := tos3(msg)
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if g.config.fail_fn != voidptr(0) {
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g.config.fail_fn(vmsg, g.config.user_data)
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} else {
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eprintln('gg error: $vmsg')
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}
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}
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//
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pub fn new_context(cfg Config) &Context {
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mut g := &Context{
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width: cfg.width
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height: cfg.height
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config: cfg
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render_text: cfg.font_path != ''
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ft: 0
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}
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g.set_bg_color(cfg.bg_color)
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// C.printf('new_context() %p\n', cfg.user_data)
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window := C.sapp_desc{
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user_data: g
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init_userdata_cb: gg_init_sokol_window
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frame_userdata_cb: gg_frame_fn
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event_userdata_cb: gg_event_fn
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fail_userdata_cb: gg_fail_fn
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cleanup_userdata_cb: gg_cleanup_fn
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window_title: cfg.window_title.str
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html5_canvas_name: cfg.window_title.str
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width: cfg.width
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height: cfg.height
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high_dpi: true
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fullscreen: cfg.fullscreen
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}
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if cfg.use_ortho {
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} else {
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}
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g.window = window
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return g
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}
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pub fn (gg &Context) run() {
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sapp.run(&gg.window)
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}
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pub fn (mut ctx Context) set_bg_color(c gx.Color) {
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ctx.clear_pass = gfx.create_clear_pass(f32(c.r) / 255.0, f32(c.g) / 255.0, f32(c.b) / 255.0,
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f32(c.a) / 255.0)
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}
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// TODO: Fix alpha
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pub fn (ctx &Context) draw_rect(x f32, y f32, w f32, h f32, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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sgl.begin_quads()
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sgl.v2f(x * ctx.scale, y * ctx.scale)
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sgl.v2f((x + w) * ctx.scale, y * ctx.scale)
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sgl.v2f((x + w) * ctx.scale, (y + h) * ctx.scale)
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sgl.v2f(x * ctx.scale, (y + h) * ctx.scale)
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sgl.end()
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}
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pub fn (ctx &Context) draw_triangle(x f32, y f32, x2 f32, y2 f32, x3 f32, y3 f32, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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sgl.begin_quads()
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sgl.v2f(x * ctx.scale, y * ctx.scale)
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sgl.v2f(x2 * ctx.scale, y2 * ctx.scale)
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sgl.v2f(x3 * ctx.scale, y3 * ctx.scale)
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sgl.end()
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}
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pub fn (ctx &Context) draw_empty_rect(x f32, y f32, w f32, h f32, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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sgl.begin_line_strip()
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if ctx.scale == 1 {
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sgl.v2f(x, y)
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sgl.v2f(x + w, y)
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sgl.v2f(x + w, y + h)
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sgl.v2f(x, y + h)
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sgl.v2f(x, y)
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} else {
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sgl.v2f(x * ctx.scale, y * ctx.scale)
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sgl.v2f((x + w) * ctx.scale, y * ctx.scale)
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sgl.v2f((x + w) * ctx.scale, (y + h) * ctx.scale)
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sgl.v2f(x * ctx.scale, (y + h) * ctx.scale)
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sgl.v2f(x * ctx.scale, y * ctx.scale)
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}
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sgl.end()
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}
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pub fn (ctx &Context) draw_circle_line(x f32, y f32, r int, segments int, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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mut theta := f32(0)
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mut xx := f32(0)
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mut yy := f32(0)
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sgl.begin_line_strip()
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for i := 0; i < segments + 1; i++ {
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theta = 2.0 * f32(math.pi) * f32(i) / f32(segments)
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xx = r * math.cosf(theta)
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yy = r * math.sinf(theta)
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sgl.v2f(xx + x, yy + y)
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}
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sgl.end()
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}
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pub fn (ctx &Context) draw_circle(x f32, y f32, r int, c gx.Color) {
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ctx.draw_circle_with_segments(x,y,r,10, c)
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}
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pub fn (ctx &Context) draw_circle_with_segments(x f32, y f32, r int, segments int, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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mut theta := f32(0)
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mut xx := f32(0)
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mut yy := f32(0)
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sgl.begin_triangle_strip()
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for i := 0; i < segments + 1; i++ {
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theta = 2.0 * f32(math.pi) * f32(i) / f32(segments)
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xx = r * math.cosf(theta)
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yy = r * math.sinf(theta)
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sgl.v2f(xx + x, yy + y)
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sgl.v2f(x, y)
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}
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sgl.end()
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}
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pub fn (ctx &Context) draw_arc_line(x f32, y f32, r int, start_angle f32, arc_angle f32, segments int, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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theta := f32(arc_angle / f32(segments))
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tan_factor := math.tanf(theta)
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rad_factor := math.cosf(theta)
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mut xx := f32(r * math.cosf(start_angle))
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mut yy := f32(r * math.sinf(start_angle))
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sgl.begin_line_strip()
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for i := 0; i < segments + 1; i++ {
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sgl.v2f(xx + x, yy + y)
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tx := -yy
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ty := xx
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xx += tx * tan_factor
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yy += ty * tan_factor
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xx *= rad_factor
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yy *= rad_factor
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}
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sgl.end()
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}
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pub fn (ctx &Context) draw_arc(x f32, y f32, r int, start_angle f32, arc_angle f32, segments int, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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theta := f32(arc_angle / f32(segments))
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tan_factor := math.tanf(theta)
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rad_factor := math.cosf(theta)
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mut xx := f32(r * math.cosf(start_angle))
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mut yy := f32(r * math.sinf(start_angle))
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sgl.begin_triangle_strip()
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for i := 0; i < segments + 1; i++ {
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sgl.v2f(xx + x, yy + y)
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sgl.v2f(x, y)
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tx := -yy
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ty := xx
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xx += tx * tan_factor
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yy += ty * tan_factor
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xx *= rad_factor
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yy *= rad_factor
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}
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sgl.end()
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}
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pub fn (gg &Context) begin() {
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if gg.render_text && gg.font_inited {
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gg.ft.flush()
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}
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sgl.defaults()
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sgl.matrix_mode_projection()
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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() {
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gfx.begin_default_pass(gg.clear_pass, sapp.width(), sapp.height())
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sgl.draw()
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gfx.end_pass()
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gfx.commit()
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if gg.config.wait_events {
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// println('gg: waiting')
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wait_events()
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}
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}
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fn abs(a f32) f32 {
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if a >= 0 {
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return a
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}
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return -a
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}
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pub fn (ctx &Context) draw_line(x f32, y f32, x2 f32, y2 f32, c gx.Color) {
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if c.a != 255 {
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sgl.load_pipeline(ctx.timage_pip)
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}
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if ctx.scale > 1 {
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// Make the line more clear on hi dpi screens: draw a rectangle
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mut width := abs(x2 - x)
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mut height := abs(y2 - y)
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if width == 0 {
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width = 1
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} else if height == 0 {
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height = 1
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}
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ctx.draw_rect(x, y, width, height, c)
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return
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}
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sgl.c4b(c.r, c.g, c.b, c.a)
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sgl.begin_line_strip()
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sgl.v2f(x * ctx.scale, y * ctx.scale)
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sgl.v2f(x2 * ctx.scale, y2 * ctx.scale)
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sgl.end()
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}
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pub fn (ctx &Context) draw_rounded_rect(x f32, y f32, width f32, height f32, radius f32, color gx.Color) {
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}
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pub fn (ctx &Context) draw_empty_rounded_rect(x f32, y f32, width f32, height f32, radius f32, border_color gx.Color) {
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}
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fn C.WaitMessage()
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pub fn wait_events() {
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unsafe {
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$if macos {
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#NSEvent *event = [NSApp nextEventMatchingMask:NSEventMaskAny
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#untilDate:[NSDate distantFuture]
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#inMode:NSDefaultRunLoopMode
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#dequeue:YES];
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#[NSApp sendEvent:event];
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}
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$if windows {
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C.WaitMessage()
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}
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}
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}
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