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v/vlib/gg/gg.c.v

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// Copyright (c) 2019-2021 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 gg
import os
import gx
import sokol
import sokol.sapp
import sokol.sgl
import sokol.gfx
import math
pub struct Event {
pub mut:
frame_count u64
typ sapp.EventType
key_code KeyCode
char_code u32
key_repeat bool
modifiers u32
mouse_button MouseButton
mouse_x f32
mouse_y f32
mouse_dx f32
mouse_dy f32
scroll_x f32
scroll_y f32
num_touches int
touches [8]C.sapp_touchpoint
window_width int
window_height int
framebuffer_width int
framebuffer_height int
}
[heap]
pub struct Context {
mut:
render_text bool = true
// a cache with all images created by the user. used for sokol image init and to save space
// (so that the user can store image ids, not entire Image objects)
image_cache []Image
needs_refresh bool = true
ticks int // for ui mode only
pub:
native_rendering bool
pub mut:
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
timage_pip C.sgl_pipeline
config Config
ft &FT
font_inited bool
ui_mode bool // do not redraw everything 60 times/second, but only when the user requests
frame u64 // the current frame counted from the start of the application; always increasing
//
mbtn_mask byte
mouse_buttons MouseButtons // typed version of mbtn_mask; easier to use for user programs
mouse_pos_x int
mouse_pos_y int
mouse_dx int
mouse_dy int
scroll_x int
scroll_y int
//
key_modifiers Modifier // the current key modifiers
key_repeat bool // whether the pressed key was an autorepeated one
pressed_keys [key_code_max]bool // an array representing all currently pressed keys
pressed_keys_edge [key_code_max]bool // true when the previous state of pressed_keys,
// *before* the current event was different
}
fn gg_init_sokol_window(user_data voidptr) {
mut g := unsafe { &Context(user_data) }
desc := sapp.create_desc()
/*
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
}
*/
gfx.setup(&desc)
sgl_desc := C.sgl_desc_t{}
sgl.setup(&sgl_desc)
g.scale = dpi_scale()
// 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_text {
// `os.is_file()` won't work on Android if the font file is embedded into the APK
exists := $if !android { os.is_file(g.config.font_path) } $else { true }
if g.config.font_path != '' && !exists {
g.render_text = false
} else if g.config.font_path != '' && exists {
// t := time.ticks()
g.ft = new_ft(
font_path: g.config.font_path
custom_bold_font_path: g.config.custom_bold_font_path
scale: dpi_scale()
) or { panic(err) }
// println('FT took ${time.ticks()-t} ms')
g.font_inited = true
} else {
if g.config.font_bytes_normal.len > 0 {
g.ft = new_ft(
bytes_normal: g.config.font_bytes_normal
bytes_bold: g.config.font_bytes_bold
bytes_mono: g.config.font_bytes_mono
bytes_italic: g.config.font_bytes_italic
scale: sapp.dpi_scale()
) or { panic(err) }
g.font_inited = true
} else {
sfont := system_font_path()
if g.config.font_path != '' {
eprintln('font file "$g.config.font_path" does not exist, the system font ($sfont) was used instead.')
}
g.ft = new_ft(
font_path: sfont
custom_bold_font_path: g.config.custom_bold_font_path
scale: sapp.dpi_scale()
) or { panic(err) }
g.font_inited = true
}
}
//
mut pipdesc := C.sg_pipeline_desc{
label: c'alpha_image'
}
unsafe { vmemset(&pipdesc, 0, int(sizeof(pipdesc))) }
color_state := C.sg_color_state{
blend: C.sg_blend_state{
enabled: true
src_factor_rgb: gfx.BlendFactor(C.SG_BLENDFACTOR_SRC_ALPHA)
dst_factor_rgb: gfx.BlendFactor(C.SG_BLENDFACTOR_ONE_MINUS_SRC_ALPHA)
}
}
pipdesc.colors[0] = color_state
g.timage_pip = sgl.make_pipeline(&pipdesc)
//
if g.config.init_fn != voidptr(0) {
g.config.init_fn(g.config.user_data)
}
// Create images now that we can do that after sg is inited
if g.native_rendering {
return
}
for i in 0 .. g.image_cache.len {
if g.image_cache[i].simg.id == 0 {
g.image_cache[i].init_sokol_image()
}
}
}
//
pub fn new_context(cfg Config) &Context {
mut g := &Context{
width: cfg.width
height: cfg.height
config: cfg
ft: 0
ui_mode: cfg.ui_mode
native_rendering: cfg.native_rendering
}
g.set_bg_color(cfg.bg_color)
// 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: &char(cfg.window_title.str)
html5_canvas_name: &char(cfg.window_title.str)
width: cfg.width
height: cfg.height
sample_count: cfg.sample_count
high_dpi: true
fullscreen: cfg.fullscreen
__v_native_render: cfg.native_rendering
}
g.window = window
return g
}
pub fn (ctx &Context) draw_circle_line(x f32, y f32, r int, segments int, c gx.Color) {
$if macos {
if ctx.native_rendering {
C.darwin_draw_circle(x - r + 1, ctx.height - (y + r + 3), r, c)
return
}
}
if c.a != 255 {
sgl.load_pipeline(ctx.timage_pip)
}
sgl.c4b(c.r, c.g, c.b, c.a)
nx := x * ctx.scale
ny := y * ctx.scale
nr := r * ctx.scale
mut theta := f32(0)
mut xx := f32(0)
mut yy := f32(0)
sgl.begin_line_strip()
for i := 0; i < segments + 1; i++ {
theta = 2.0 * f32(math.pi) * f32(i) / f32(segments)
xx = nr * math.cosf(theta)
yy = nr * math.sinf(theta)
sgl.v2f(xx + nx, yy + ny)
}
sgl.end()
}
pub fn high_dpi() bool {
return C.sapp_high_dpi()
}
pub fn screen_size() Size {
$if macos {
return C.gg_get_screen_size()
}
// TODO windows, linux, etc
return Size{}
}
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()
}
}
}
*/
// TODO: Fix alpha
pub fn (ctx &Context) draw_rect(x f32, y f32, w f32, h f32, c gx.Color) {
$if macos {
if ctx.native_rendering {
C.darwin_draw_rect(x, ctx.height - (y + h), w, h, c)
return
}
}
if c.a != 255 {
sgl.load_pipeline(ctx.timage_pip)
}
sgl.c4b(c.r, c.g, c.b, c.a)
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()
}