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v/vlib/gg/gg.c.v

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// Copyright (c) 2019-2022 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 os.font
import gx
import sokol
import sokol.sapp
import sokol.sgl
import sokol.gfx
$if windows {
#flag -lgdi32
#include "windows.h"
}
// call Windows API to get screen size
fn C.GetSystemMetrics(int) int
// fn C.WaitMessage()
pub type TouchPoint = C.sapp_touchpoint
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]TouchPoint
window_width int
window_height int
framebuffer_width int
framebuffer_height int
}
pub struct Config {
pub:
width int
height int
use_ortho bool // unused, still here just for backwards compatibility
retina bool
resizable bool
user_data voidptr
font_size int
create_window bool
// window_user_ptr voidptr
window_title string
borderless_window bool
always_on_top bool
bg_color gx.Color
init_fn FNCb = voidptr(0)
frame_fn FNCb = voidptr(0)
native_frame_fn FNCb = voidptr(0)
cleanup_fn FNCb = voidptr(0)
fail_fn FNFail = voidptr(0)
//
event_fn FNEvent = voidptr(0)
quit_fn FNEvent = voidptr(0)
//
keydown_fn FNKeyDown = voidptr(0)
keyup_fn FNKeyUp = voidptr(0)
char_fn FNChar = voidptr(0)
//
move_fn FNMove = voidptr(0)
click_fn FNClick = voidptr(0)
unclick_fn FNUnClick = voidptr(0)
leave_fn FNEvent = voidptr(0)
enter_fn FNEvent = voidptr(0)
resized_fn FNEvent = voidptr(0)
scroll_fn FNEvent = voidptr(0)
// wait_events bool // set this to true for UIs, to save power
fullscreen bool
scale f32 = 1.0
sample_count int
swap_interval int = 1 // 1 = 60fps, 2 = 30fps etc. The preferred swap interval (ignored on some platforms)
// ved needs this
// init_text bool
font_path string
custom_bold_font_path string
ui_mode bool // refreshes only on events to save CPU usage
// font bytes for embedding
font_bytes_normal []u8
font_bytes_bold []u8
font_bytes_mono []u8
font_bytes_italic []u8
native_rendering bool // Cocoa on macOS/iOS, GDI+ on Windows
// drag&drop
enable_dragndrop bool // enable file dropping (drag'n'drop), default is false
max_dropped_files int = 1 // max number of dropped files to process (default: 1)
max_dropped_file_path_length int = 2048 // max length in bytes of a dropped UTF-8 file path (default: 2048)
}
[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 gfx.PassAction
window sapp.Desc
timage_pip sgl.Pipeline
config Config
user_data voidptr
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 u8
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 ctx := unsafe { &Context(user_data) }
desc := sapp.create_desc()
/*
desc := gfx.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{}
sgl.setup(&sgl_desc)
ctx.set_scale()
// is_high_dpi := sapp.high_dpi()
// fb_w := sapp.width()
// fb_h := sapp.height()
// println('ctx.scale=$ctx.scale is_high_dpi=$is_high_dpi fb_w=$fb_w fb_h=$fb_h')
// if ctx.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(ctx.config.font_path) } $else { true }
if ctx.config.font_path != '' && !exists {
ctx.render_text = false
} else if ctx.config.font_path != '' && exists {
// t := time.ticks()
ctx.ft = new_ft(
font_path: ctx.config.font_path
custom_bold_font_path: ctx.config.custom_bold_font_path
scale: ctx.scale
) or { panic(err) }
// println('FT took ${time.ticks()-t} ms')
ctx.font_inited = true
} else {
if ctx.config.font_bytes_normal.len > 0 {
ctx.ft = new_ft(
bytes_normal: ctx.config.font_bytes_normal
bytes_bold: ctx.config.font_bytes_bold
bytes_mono: ctx.config.font_bytes_mono
bytes_italic: ctx.config.font_bytes_italic
scale: sapp.dpi_scale()
) or { panic(err) }
ctx.font_inited = true
} else {
sfont := font.default()
if ctx.config.font_path != '' {
eprintln('font file "$ctx.config.font_path" does not exist, the system font ($sfont) was used instead.')
}
ctx.ft = new_ft(
font_path: sfont
custom_bold_font_path: ctx.config.custom_bold_font_path
scale: sapp.dpi_scale()
) or { panic(err) }
ctx.font_inited = true
}
}
//
mut pipdesc := gfx.PipelineDesc{
label: c'alpha_image'
}
unsafe { vmemset(&pipdesc, 0, int(sizeof(pipdesc))) }
color_state := gfx.ColorState{
blend: gfx.BlendState{
enabled: true
src_factor_rgb: .src_alpha
dst_factor_rgb: .one_minus_src_alpha
}
}
pipdesc.colors[0] = color_state
ctx.timage_pip = sgl.make_pipeline(&pipdesc)
//
if ctx.config.init_fn != voidptr(0) {
$if android {
// NOTE on Android sokol can emit resize events *before* the init function is
// called (Android has to initialize a lot more through the Activity system to
// reach a valid coontext) and thus the user's code will miss the resize event.
// To prevent this we emit a custom window resize event, if the screen size has
// changed meanwhile.
win_size := ctx.window_size()
if ctx.width != win_size.width || ctx.height != win_size.height {
ctx.width = win_size.width
ctx.height = win_size.height
if ctx.config.resized_fn != voidptr(0) {
e := Event{
typ: .resized
window_width: ctx.width
window_height: ctx.height
}
ctx.config.resized_fn(&e, ctx.user_data)
}
}
}
ctx.config.init_fn(ctx.user_data)
}
// Create images now that we can do that after sg is inited
if ctx.native_rendering {
return
}
for i in 0 .. ctx.image_cache.len {
if ctx.image_cache[i].simg.id == 0 {
ctx.image_cache[i].init_sokol_image()
}
}
}
fn gg_frame_fn(user_data voidptr) {
mut ctx := unsafe { &Context(user_data) }
ctx.frame++
if ctx.config.frame_fn == voidptr(0) {
return
}
if ctx.native_rendering {
// return
}
ctx.record_frame()
if ctx.ui_mode && !ctx.needs_refresh {
// Draw 3 more frames after the "stop refresh" command
ctx.ticks++
if ctx.ticks > 3 {
return
}
}
ctx.config.frame_fn(ctx.user_data)
ctx.needs_refresh = false
}
fn gg_event_fn(ce voidptr, user_data voidptr) {
// e := unsafe { &sapp.Event(ce) }
mut e := unsafe { &Event(ce) }
mut ctx := unsafe { &Context(user_data) }
if ctx.ui_mode {
ctx.refresh_ui()
}
if e.typ == .mouse_down {
bitplace := int(e.mouse_button)
ctx.mbtn_mask |= u8(1 << bitplace)
ctx.mouse_buttons = MouseButtons(ctx.mbtn_mask)
}
if e.typ == .mouse_up {
bitplace := int(e.mouse_button)
ctx.mbtn_mask &= ~(u8(1 << bitplace))
ctx.mouse_buttons = MouseButtons(ctx.mbtn_mask)
}
if e.typ == .mouse_move && e.mouse_button == .invalid {
if ctx.mbtn_mask & 0x01 > 0 {
e.mouse_button = .left
}
if ctx.mbtn_mask & 0x02 > 0 {
e.mouse_button = .right
}
if ctx.mbtn_mask & 0x04 > 0 {
e.mouse_button = .middle
}
}
ctx.mouse_pos_x = int(e.mouse_x / ctx.scale)
ctx.mouse_pos_y = int(e.mouse_y / ctx.scale)
ctx.mouse_dx = int(e.mouse_dx / ctx.scale)
ctx.mouse_dy = int(e.mouse_dy / ctx.scale)
ctx.scroll_x = int(e.scroll_x / ctx.scale)
ctx.scroll_y = int(e.scroll_y / ctx.scale)
ctx.key_modifiers = Modifier(e.modifiers)
ctx.key_repeat = e.key_repeat
if e.typ in [.key_down, .key_up] {
key_idx := int(e.key_code) % key_code_max
prev := ctx.pressed_keys[key_idx]
next := e.typ == .key_down
ctx.pressed_keys[key_idx] = next
ctx.pressed_keys_edge[key_idx] = prev != next
}
if ctx.config.event_fn != voidptr(0) {
ctx.config.event_fn(e, ctx.config.user_data)
}
match e.typ {
.mouse_move {
if ctx.config.move_fn != voidptr(0) {
ctx.config.move_fn(e.mouse_x / ctx.scale, e.mouse_y / ctx.scale, ctx.config.user_data)
}
}
.mouse_down {
if ctx.config.click_fn != voidptr(0) {
ctx.config.click_fn(e.mouse_x / ctx.scale, e.mouse_y / ctx.scale, e.mouse_button,
ctx.config.user_data)
}
}
.mouse_up {
if ctx.config.unclick_fn != voidptr(0) {
ctx.config.unclick_fn(e.mouse_x / ctx.scale, e.mouse_y / ctx.scale, e.mouse_button,
ctx.config.user_data)
}
}
.mouse_leave {
if ctx.config.leave_fn != voidptr(0) {
ctx.config.leave_fn(e, ctx.config.user_data)
}
}
.mouse_enter {
if ctx.config.enter_fn != voidptr(0) {
ctx.config.enter_fn(e, ctx.config.user_data)
}
}
.mouse_scroll {
if ctx.config.scroll_fn != voidptr(0) {
ctx.config.scroll_fn(e, ctx.config.user_data)
}
}
.key_down {
if ctx.config.keydown_fn != voidptr(0) {
ctx.config.keydown_fn(e.key_code, Modifier(e.modifiers), ctx.config.user_data)
}
}
.key_up {
if ctx.config.keyup_fn != voidptr(0) {
ctx.config.keyup_fn(e.key_code, Modifier(e.modifiers), ctx.config.user_data)
}
}
.char {
if ctx.config.char_fn != voidptr(0) {
ctx.config.char_fn(e.char_code, ctx.config.user_data)
}
}
.resized {
if ctx.config.resized_fn != voidptr(0) {
ctx.config.resized_fn(e, ctx.config.user_data)
}
}
.quit_requested {
if ctx.config.quit_fn != voidptr(0) {
ctx.config.quit_fn(e, ctx.config.user_data)
}
}
else {
// dump(e)
}
}
}
fn gg_cleanup_fn(user_data voidptr) {
mut ctx := unsafe { &Context(user_data) }
if ctx.config.cleanup_fn != voidptr(0) {
ctx.config.cleanup_fn(ctx.config.user_data)
}
gfx.shutdown()
}
fn gg_fail_fn(msg &char, user_data voidptr) {
mut ctx := unsafe { &Context(user_data) }
vmsg := unsafe { tos3(msg) }
if ctx.config.fail_fn != voidptr(0) {
ctx.config.fail_fn(vmsg, ctx.config.user_data)
} else {
eprintln('gg error: $vmsg')
}
}
//---- public methods
// new_context returns an initialized `Context` allocated on the heap.
pub fn new_context(cfg Config) &Context {
mut ctx := &Context{
user_data: cfg.user_data
width: cfg.width
height: cfg.height
config: cfg
ft: 0
ui_mode: cfg.ui_mode
native_rendering: cfg.native_rendering
}
if isnil(cfg.user_data) {
ctx.user_data = ctx
}
ctx.set_bg_color(cfg.bg_color)
// C.printf('new_context() %p\n', cfg.user_data)
window := sapp.Desc{
user_data: ctx
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
// drag&drop
enable_dragndrop: cfg.enable_dragndrop
max_dropped_files: cfg.max_dropped_files
max_dropped_file_path_length: cfg.max_dropped_file_path_length
swap_interval: cfg.swap_interval
}
ctx.window = window
return ctx
}
// run starts the main loop of the context.
pub fn (ctx &Context) run() {
sapp.run(&ctx.window)
}
// quit closes the context window and exits the event loop for it
pub fn (ctx &Context) quit() {
sapp.request_quit() // does not require ctx right now, but sokol multi-window might in the future
}
// set_bg_color sets the color of the window background to `c`.
pub fn (mut ctx Context) set_bg_color(c gx.Color) {
ctx.clear_pass = gfx.create_clear_pass(f32(c.r) / 255.0, f32(c.g) / 255.0, f32(c.b) / 255.0,
f32(c.a) / 255.0)
}
// Resize the context's Window
pub fn (mut ctx Context) resize(width int, height int) {
ctx.width = width
ctx.height = height
}
// refresh_ui requests a complete re-draw of the window contents.
pub fn (mut ctx Context) refresh_ui() {
ctx.needs_refresh = true
ctx.ticks = 0
}
// begin prepares the context for drawing.
pub fn (ctx &Context) begin() {
if ctx.render_text && ctx.font_inited {
ctx.ft.flush()
}
sgl.defaults()
sgl.matrix_mode_projection()
sgl.ortho(0.0, f32(sapp.width()), f32(sapp.height()), 0.0, -1.0, 1.0)
}
// end finishes drawing for the context.
pub fn (ctx &Context) end() {
gfx.begin_default_pass(ctx.clear_pass, sapp.width(), sapp.height())
sgl.draw()
gfx.end_pass()
gfx.commit()
/*
if gg.config.wait_events {
// println('gg: waiting')
wait_events()
}
*/
}
fn (mut ctx Context) set_scale() {
mut s := sapp.dpi_scale()
$if android {
w := ctx.config.width
h := ctx.config.height
dw := sapp.width()
dh := sapp.height()
if dw <= dh {
if w <= 0 {
s = 1.0
} else {
s = f32(dw) / w
}
} else {
if h <= 0 {
s = 1.0
} else {
s = f32(dh) / h
}
}
}
// Note: 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 s < 0.1 {
s = 1.0
}
ctx.scale = s
}
// window_size returns the current dimensions of the window.
pub fn (ctx Context) window_size() Size {
s := ctx.scale
return Size{int(sapp.width() / s), int(sapp.height() / s)}
}
//---- public module functions
// dpi_scale returns the DPI scale coefficient for the screen.
// Do not use for Android development, use `Context.scale` instead.
pub fn dpi_scale() f32 {
mut s := sapp.dpi_scale()
$if android {
s *= android_dpi_scale()
}
// Note: 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 s < 0.1 {
s = 1.0
}
return s
}
// high_dpi returns true if `gg` is running on a high DPI monitor or screen.
pub fn high_dpi() bool {
return C.sapp_high_dpi()
}
// screen_size returns the size of the active screen.
pub fn screen_size() Size {
$if macos {
return C.gg_get_screen_size()
}
$if windows {
return Size{
width: int(C.GetSystemMetrics(C.SM_CXSCREEN))
height: int(C.GetSystemMetrics(C.SM_CYSCREEN))
}
}
// TODO linux, etc
return Size{}
}
// window_size returns the `Size` of the active window.
// Do not use for Android development, use `Context.window_size()` instead.
pub fn window_size() Size {
s := dpi_scale()
return Size{int(sapp.width() / s), int(sapp.height() / s)}
}
// window_size_real_pixels returns the `Size` of the active window without scale
pub fn window_size_real_pixels() Size {
return Size{sapp.width(), sapp.height()}
}
/*
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()
}
}
}
*/