1275 lines
34 KiB
V
1275 lines
34 KiB
V
// 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 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 []byte
|
|
font_bytes_bold []byte
|
|
font_bytes_mono []byte
|
|
font_bytes_italic []byte
|
|
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 C.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 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 := 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 := 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 := 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
|
|
|
|
g.timage_pip = sgl.make_pipeline(&pipdesc)
|
|
//
|
|
if g.config.init_fn != voidptr(0) {
|
|
g.config.init_fn(g.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{
|
|
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) {
|
|
g.user_data = g
|
|
}
|
|
g.set_bg_color(cfg.bg_color)
|
|
// C.printf('new_context() %p\n', cfg.user_data)
|
|
window := 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
|
|
// 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
|
|
}
|
|
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
|
|
[deprecated: 'use draw_rect_filled() instead']
|
|
pub fn (ctx &Context) draw_rect(x f32, y f32, w f32, h f32, c gx.Color) {
|
|
ctx.draw_rect_filled(x, y, w, h, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_rect_filled(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()
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
pub fn (mut ctx Context) refresh_ui() {
|
|
ctx.needs_refresh = true
|
|
ctx.ticks = 0
|
|
}
|
|
|
|
fn gg_event_fn(ce voidptr, user_data voidptr) {
|
|
// e := unsafe { &sapp.Event(ce) }
|
|
mut e := unsafe { &Event(ce) }
|
|
mut g := unsafe { &Context(user_data) }
|
|
if g.ui_mode {
|
|
g.refresh_ui()
|
|
}
|
|
if e.typ == .mouse_down {
|
|
bitplace := int(e.mouse_button)
|
|
g.mbtn_mask |= byte(1 << bitplace)
|
|
g.mouse_buttons = MouseButtons(g.mbtn_mask)
|
|
}
|
|
if e.typ == .mouse_up {
|
|
bitplace := int(e.mouse_button)
|
|
g.mbtn_mask &= ~(byte(1 << bitplace))
|
|
g.mouse_buttons = MouseButtons(g.mbtn_mask)
|
|
}
|
|
if e.typ == .mouse_move && e.mouse_button == .invalid {
|
|
if g.mbtn_mask & 0x01 > 0 {
|
|
e.mouse_button = .left
|
|
}
|
|
if g.mbtn_mask & 0x02 > 0 {
|
|
e.mouse_button = .right
|
|
}
|
|
if g.mbtn_mask & 0x04 > 0 {
|
|
e.mouse_button = .middle
|
|
}
|
|
}
|
|
g.mouse_pos_x = int(e.mouse_x / g.scale)
|
|
g.mouse_pos_y = int(e.mouse_y / g.scale)
|
|
g.mouse_dx = int(e.mouse_dx / g.scale)
|
|
g.mouse_dy = int(e.mouse_dy / g.scale)
|
|
g.scroll_x = int(e.scroll_x / g.scale)
|
|
g.scroll_y = int(e.scroll_y / g.scale)
|
|
g.key_modifiers = Modifier(e.modifiers)
|
|
g.key_repeat = e.key_repeat
|
|
if e.typ in [.key_down, .key_up] {
|
|
key_idx := int(e.key_code) % key_code_max
|
|
prev := g.pressed_keys[key_idx]
|
|
next := e.typ == .key_down
|
|
g.pressed_keys[key_idx] = next
|
|
g.pressed_keys_edge[key_idx] = prev != next
|
|
}
|
|
if g.config.event_fn != voidptr(0) {
|
|
g.config.event_fn(e, g.config.user_data)
|
|
}
|
|
match e.typ {
|
|
.mouse_move {
|
|
if g.config.move_fn != voidptr(0) {
|
|
g.config.move_fn(e.mouse_x / g.scale, e.mouse_y / g.scale, g.config.user_data)
|
|
}
|
|
}
|
|
.mouse_down {
|
|
if g.config.click_fn != voidptr(0) {
|
|
g.config.click_fn(e.mouse_x / g.scale, e.mouse_y / g.scale, e.mouse_button,
|
|
g.config.user_data)
|
|
}
|
|
}
|
|
.mouse_up {
|
|
if g.config.unclick_fn != voidptr(0) {
|
|
g.config.unclick_fn(e.mouse_x / g.scale, e.mouse_y / g.scale, e.mouse_button,
|
|
g.config.user_data)
|
|
}
|
|
}
|
|
.mouse_leave {
|
|
if g.config.leave_fn != voidptr(0) {
|
|
g.config.leave_fn(e, g.config.user_data)
|
|
}
|
|
}
|
|
.mouse_enter {
|
|
if g.config.enter_fn != voidptr(0) {
|
|
g.config.enter_fn(e, g.config.user_data)
|
|
}
|
|
}
|
|
.mouse_scroll {
|
|
if g.config.scroll_fn != voidptr(0) {
|
|
g.config.scroll_fn(e, g.config.user_data)
|
|
}
|
|
}
|
|
.key_down {
|
|
if g.config.keydown_fn != voidptr(0) {
|
|
g.config.keydown_fn(e.key_code, Modifier(e.modifiers), g.config.user_data)
|
|
}
|
|
}
|
|
.key_up {
|
|
if g.config.keyup_fn != voidptr(0) {
|
|
g.config.keyup_fn(e.key_code, Modifier(e.modifiers), g.config.user_data)
|
|
}
|
|
}
|
|
.char {
|
|
if g.config.char_fn != voidptr(0) {
|
|
g.config.char_fn(e.char_code, g.config.user_data)
|
|
}
|
|
}
|
|
.resized {
|
|
if g.config.resized_fn != voidptr(0) {
|
|
g.config.resized_fn(e, g.config.user_data)
|
|
}
|
|
}
|
|
.quit_requested {
|
|
if g.config.quit_fn != voidptr(0) {
|
|
g.config.quit_fn(e, g.config.user_data)
|
|
}
|
|
}
|
|
else {
|
|
// dump(e)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn gg_cleanup_fn(user_data voidptr) {
|
|
mut g := unsafe { &Context(user_data) }
|
|
if g.config.cleanup_fn != voidptr(0) {
|
|
g.config.cleanup_fn(g.config.user_data)
|
|
}
|
|
gfx.shutdown()
|
|
}
|
|
|
|
fn gg_fail_fn(msg &char, user_data voidptr) {
|
|
mut g := unsafe { &Context(user_data) }
|
|
vmsg := unsafe { tos3(msg) }
|
|
if g.config.fail_fn != voidptr(0) {
|
|
g.config.fail_fn(vmsg, g.config.user_data)
|
|
} else {
|
|
eprintln('gg error: $vmsg')
|
|
}
|
|
}
|
|
|
|
pub fn (ctx &Context) run() {
|
|
sapp.run(&ctx.window)
|
|
}
|
|
|
|
// Prepares the context for drawing
|
|
pub fn (gg &Context) begin() {
|
|
if gg.render_text && gg.font_inited {
|
|
gg.ft.flush()
|
|
}
|
|
sgl.defaults()
|
|
sgl.matrix_mode_projection()
|
|
sgl.ortho(0.0, f32(sapp.width()), f32(sapp.height()), 0.0, -1.0, 1.0)
|
|
}
|
|
|
|
// Finishes drawing for the context
|
|
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 {
|
|
// println('gg: waiting')
|
|
wait_events()
|
|
}
|
|
*/
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
// Sets a pixel
|
|
[deprecated: 'use draw_pixel() instead']
|
|
pub fn (ctx &Context) set_pixel(x f32, y f32, c gx.Color) {
|
|
ctx.draw_pixel(x, y, c)
|
|
}
|
|
|
|
[inline]
|
|
pub fn (ctx &Context) draw_pixel(x f32, y f32, c gx.Color) {
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_points()
|
|
sgl.v2f(x * ctx.scale, y * ctx.scale)
|
|
sgl.end()
|
|
}
|
|
|
|
[deprecated: 'use draw_pixels() instead']
|
|
pub fn (ctx &Context) set_pixels(points []f32, c gx.Color) {
|
|
ctx.draw_pixels(points, c)
|
|
}
|
|
|
|
// Sets pixels from an array of points [x, y, x2, y2, etc...]
|
|
[direct_array_access; inline]
|
|
pub fn (ctx &Context) draw_pixels(points []f32, c gx.Color) {
|
|
assert points.len % 2 == 0
|
|
len := points.len / 2
|
|
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_points()
|
|
for i in 0 .. len {
|
|
x, y := points[i * 2], points[i * 2 + 1]
|
|
sgl.v2f(x * ctx.scale, y * ctx.scale)
|
|
}
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws a filled triangle
|
|
[deprecated: 'use draw_triangle_filled() instead']
|
|
pub fn (ctx &Context) draw_triangle(x f32, y f32, x2 f32, y2 f32, x3 f32, y3 f32, c gx.Color) {
|
|
ctx.draw_triangle_filled(x, y, x2, y2, x3, y3, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_triangle_filled(x f32, y f32, x2 f32, y2 f32, x3 f32, y3 f32, c gx.Color) {
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_triangles()
|
|
sgl.v2f(x * ctx.scale, y * ctx.scale)
|
|
sgl.v2f(x2 * ctx.scale, y2 * ctx.scale)
|
|
sgl.v2f(x3 * ctx.scale, y3 * ctx.scale)
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws the outline of a triangle
|
|
[deprecated: 'use draw_triangle_empty() instead']
|
|
pub fn (ctx &Context) draw_empty_triangle(x f32, y f32, x2 f32, y2 f32, x3 f32, y3 f32, c gx.Color) {
|
|
ctx.draw_triangle_empty(x, y, x2, y2, x3, y3, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_triangle_empty(x f32, y f32, x2 f32, y2 f32, x3 f32, y3 f32, c gx.Color) {
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_line_strip()
|
|
sgl.v2f(x * ctx.scale, y * ctx.scale)
|
|
sgl.v2f(x2 * ctx.scale, y2 * ctx.scale)
|
|
sgl.v2f(x3 * ctx.scale, y3 * ctx.scale)
|
|
sgl.v2f(x * ctx.scale, y * ctx.scale)
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws a filled square
|
|
[deprecated: 'use draw_square_filled() instead']
|
|
pub fn (ctx &Context) draw_square(x f32, y f32, s f32, c gx.Color) {
|
|
ctx.draw_square_filled(x, y, s, c)
|
|
}
|
|
|
|
[inline]
|
|
pub fn (ctx &Context) draw_square_filled(x f32, y f32, s f32, c gx.Color) {
|
|
ctx.draw_rect_filled(x, y, s, s, c)
|
|
}
|
|
|
|
// Draws the outline of a square
|
|
[deprecated: 'use draw_square_empty() instead']
|
|
pub fn (ctx &Context) draw_empty_square(x f32, y f32, s f32, c gx.Color) {
|
|
ctx.draw_square_empty(x, y, s, c)
|
|
}
|
|
|
|
[inline]
|
|
pub fn (ctx &Context) draw_square_empty(x f32, y f32, s f32, c gx.Color) {
|
|
ctx.draw_rect_empty(x, y, s, s, c)
|
|
}
|
|
|
|
// Draws the outline of a rectangle
|
|
[deprecated: 'use draw_rect_empty() instead']
|
|
pub fn (ctx &Context) draw_empty_rect(x f32, y f32, w f32, h f32, c gx.Color) {
|
|
ctx.draw_rect_empty(x, y, w, h, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_rect_empty(x f32, y f32, w f32, h f32, c gx.Color) {
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_line_strip()
|
|
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 - 1) * ctx.scale)
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws a filled circle
|
|
[deprecated: 'use draw_circle_filled() instead']
|
|
pub fn (ctx &Context) draw_circle(x f32, y f32, r f32, c gx.Color) {
|
|
ctx.draw_circle_filled(x, y, r, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_circle_filled(x f32, y f32, r f32, c gx.Color) {
|
|
ctx.draw_circle_with_segments(x, y, r, 10, c)
|
|
}
|
|
|
|
// Draws a circle with a specific number of segments (affects how smooth/round the circle is)
|
|
pub fn (ctx &Context) draw_circle_with_segments(x f32, y f32, r f32, segments int, c gx.Color) {
|
|
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_triangle_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.v2f(nx, ny)
|
|
}
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws a filled circle slice/pie.
|
|
[deprecated: 'use draw_slice_filled() instead']
|
|
pub fn (ctx &Context) draw_slice(x f32, y f32, r f32, start_angle f32, arc_angle f32, segments int, c gx.Color) {
|
|
ctx.draw_slice_filled(x, y, r, start_angle, arc_angle, segments, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_slice_filled(x f32, y f32, r f32, start_angle f32, arc_angle f32, segments int, c gx.Color) {
|
|
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
|
|
theta := f32(arc_angle / f32(segments))
|
|
tan_factor := math.tanf(theta)
|
|
rad_factor := math.cosf(theta)
|
|
mut xx := r * math.cosf(start_angle)
|
|
mut yy := r * math.sinf(start_angle)
|
|
sgl.begin_triangle_strip()
|
|
for i := 0; i < segments + 1; i++ {
|
|
sgl.v2f(xx + nx, yy + ny)
|
|
sgl.v2f(nx, ny)
|
|
tx := -yy
|
|
ty := xx
|
|
xx += tx * tan_factor
|
|
yy += ty * tan_factor
|
|
xx *= rad_factor
|
|
yy *= rad_factor
|
|
}
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws the outline of a circle slice/pie.
|
|
[deprecated: 'use draw_slice_empty() instead']
|
|
pub fn (ctx &Context) draw_empty_slice(x f32, y f32, r f32, start_angle f32, arc_angle f32, segments int, c gx.Color) {
|
|
ctx.draw_slice_empty(x, y, r, start_angle, arc_angle, segments, c)
|
|
}
|
|
|
|
// TODO: Add inner angle to empty shape
|
|
pub fn (ctx &Context) draw_slice_empty(x f32, y f32, r f32, start_angle f32, arc_angle f32, segments int, c gx.Color) {
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
theta := f32(arc_angle / f32(segments))
|
|
tan_factor := math.tanf(theta)
|
|
rad_factor := math.cosf(theta)
|
|
nx := x * ctx.scale
|
|
ny := y * ctx.scale
|
|
mut xx := r * math.cosf(start_angle)
|
|
mut yy := r * math.sinf(start_angle)
|
|
sgl.begin_line_strip()
|
|
for i := 0; i < segments + 1; i++ {
|
|
sgl.v2f(xx + nx, yy + ny)
|
|
tx := -yy
|
|
ty := xx
|
|
xx += tx * tan_factor
|
|
yy += ty * tan_factor
|
|
xx *= rad_factor
|
|
yy *= rad_factor
|
|
}
|
|
sgl.end()
|
|
}
|
|
|
|
// Resize the context's Window
|
|
pub fn (mut ctx Context) resize(width int, height int) {
|
|
ctx.width = width
|
|
ctx.height = height
|
|
// C.sapp_resize_window(width, height)
|
|
}
|
|
|
|
// Draws a line between the points provided
|
|
pub fn (ctx &Context) draw_line(x f32, y f32, x2 f32, y2 f32, c gx.Color) {
|
|
$if macos {
|
|
if ctx.native_rendering {
|
|
// Make the line more clear on hi dpi screens: draw a rectangle
|
|
mut width := math.abs(x2 - x)
|
|
mut height := math.abs(y2 - y)
|
|
if width == 0 {
|
|
width = 1
|
|
} else if height == 0 {
|
|
height = 1
|
|
}
|
|
ctx.draw_rect_filled(x, y, f32(width), f32(height), c)
|
|
return
|
|
}
|
|
}
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_line_strip()
|
|
sgl.v2f(x * ctx.scale, y * ctx.scale)
|
|
sgl.v2f(x2 * ctx.scale, y2 * ctx.scale)
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws a line between the points provided with the PenConfig
|
|
pub fn (ctx &Context) draw_line_with_config(x f32, y f32, x2 f32, y2 f32, config PenConfig) {
|
|
if config.color.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
|
|
if config.thickness <= 0 {
|
|
return
|
|
}
|
|
|
|
nx := x * ctx.scale
|
|
ny := y * ctx.scale
|
|
nx2 := x2 * ctx.scale
|
|
ny2 := y2 * ctx.scale
|
|
|
|
dx := nx2 - nx
|
|
dy := ny2 - ny
|
|
length := math.sqrtf(math.powf(x2 - x, 2) + math.powf(y2 - y, 2))
|
|
theta := f32(math.atan2(dy, dx))
|
|
|
|
sgl.push_matrix()
|
|
|
|
sgl.translate(nx, ny, 0)
|
|
sgl.rotate(theta, 0, 0, 1)
|
|
sgl.translate(-nx, -ny, 0)
|
|
|
|
if config.line_type == .solid {
|
|
ctx.draw_rect_filled(x, y, length, config.thickness, config.color)
|
|
} else {
|
|
size := if config.line_type == .dotted { config.thickness } else { config.thickness * 3 }
|
|
space := if size == 1 { 2 } else { size }
|
|
|
|
mut available := length
|
|
mut start_x := x
|
|
|
|
for i := 0; available > 0; i++ {
|
|
if i % 2 == 0 {
|
|
ctx.draw_rect_filled(start_x, y, size, config.thickness, config.color)
|
|
available -= size
|
|
start_x += size
|
|
continue
|
|
}
|
|
|
|
available -= space
|
|
start_x += space
|
|
}
|
|
}
|
|
|
|
sgl.pop_matrix()
|
|
}
|
|
|
|
// Draws a filled arc
|
|
[deprecated: 'use draw_arc_filled() instead']
|
|
pub fn (ctx &Context) draw_arc(x f32, y f32, inner_r f32, outer_r f32, start_angle f32, end_angle f32, segments int, c gx.Color) {
|
|
ctx.draw_arc_filled(x, y, inner_r, outer_r, start_angle, end_angle, segments, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_arc_filled(x f32, y f32, inner_r f32, outer_r f32, start_angle f32, end_angle f32, segments int, c gx.Color) {
|
|
if start_angle == end_angle || outer_r <= 0.0 {
|
|
return
|
|
}
|
|
|
|
mut r1 := inner_r
|
|
mut r2 := outer_r
|
|
mut a1 := start_angle
|
|
mut a2 := end_angle
|
|
|
|
// TODO: Maybe this does not make since inner_r and outer_r is actually integers?
|
|
if outer_r < inner_r {
|
|
r1, r2 = r2, r1
|
|
|
|
if r2 <= 0.0 {
|
|
r2 = 0.1
|
|
}
|
|
}
|
|
|
|
if a2 < a1 {
|
|
a1, a2 = a2, a1
|
|
}
|
|
|
|
if r1 <= 0.0 {
|
|
ctx.draw_slice_filled(x, y, int(r2), a1, a2, segments, c)
|
|
return
|
|
}
|
|
|
|
mut step_length := (a2 - a1) / f32(segments)
|
|
mut angle := a1
|
|
|
|
sgl.begin_quads()
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
for _ in 0 .. segments {
|
|
sgl.v2f(x + f32(math.sin(angle)) * r1, y + f32(math.cos(angle) * r1))
|
|
sgl.v2f(x + f32(math.sin(angle)) * r2, y + f32(math.cos(angle) * r2))
|
|
|
|
sgl.v2f(x + f32(math.sin(angle + step_length)) * r2, y + f32(math.cos(angle +
|
|
step_length) * r2))
|
|
sgl.v2f(x + f32(math.sin(angle + step_length)) * r1, y + f32(math.cos(angle +
|
|
step_length) * r1))
|
|
|
|
angle += step_length
|
|
}
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws the outline of an arc
|
|
[deprecated: 'use draw_arc_empty() instead']
|
|
pub fn (ctx &Context) draw_empty_arc(x f32, y f32, inner_r f32, outer_r f32, start_angle f32, end_angle f32, segments int, c gx.Color) {
|
|
ctx.draw_arc_empty(x, y, inner_r, outer_r, start_angle, end_angle, segments, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_arc_empty(x f32, y f32, inner_r f32, outer_r f32, start_angle f32, end_angle f32, segments int, c gx.Color) {
|
|
if start_angle == end_angle || outer_r <= 0.0 {
|
|
return
|
|
}
|
|
|
|
mut r1 := inner_r
|
|
mut r2 := outer_r
|
|
mut a1 := start_angle
|
|
mut a2 := end_angle
|
|
|
|
if outer_r < inner_r {
|
|
r1, r2 = r2, r1
|
|
|
|
if r2 <= 0.0 {
|
|
r2 = 0.1
|
|
}
|
|
}
|
|
|
|
if a2 < a1 {
|
|
a1, a2 = a2, a1
|
|
}
|
|
|
|
if r1 <= 0.0 {
|
|
ctx.draw_slice_empty(x, y, int(r2), a1, a2, segments, c)
|
|
return
|
|
}
|
|
|
|
mut step_length := (a2 - a1) / f32(segments)
|
|
mut angle := a1
|
|
|
|
sgl.begin_line_strip()
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
|
|
// Outer circle
|
|
for _ in 0 .. segments {
|
|
sgl.v2f(x + f32(math.sin(angle)) * r2, y + f32(math.cos(angle) * r2))
|
|
sgl.v2f(x + f32(math.sin(angle + step_length)) * r2, y + f32(math.cos(angle +
|
|
step_length) * r2))
|
|
|
|
angle += step_length
|
|
}
|
|
|
|
// Inner circle
|
|
for _ in 0 .. segments {
|
|
sgl.v2f(x + f32(math.sin(angle)) * r1, y + f32(math.cos(angle) * r1))
|
|
sgl.v2f(x + f32(math.sin(angle - step_length)) * r1, y +
|
|
f32(math.cos(angle - step_length) * r1))
|
|
|
|
angle -= step_length
|
|
}
|
|
|
|
// Closing end
|
|
sgl.v2f(x + f32(math.sin(angle)) * r1, y + f32(math.cos(angle) * r1))
|
|
sgl.v2f(x + f32(math.sin(angle)) * r2, y + f32(math.cos(angle) * r2))
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws a filled rounded rectangle
|
|
[deprecated: 'use draw_rounded_rect_filled()']
|
|
pub fn (ctx &Context) draw_rounded_rect(x f32, y f32, w f32, h f32, radius f32, c gx.Color) {
|
|
ctx.draw_rounded_rect_filled(x, y, w, h, radius, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_rounded_rect_filled(x f32, y f32, w f32, h f32, radius f32, c gx.Color) {
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_triangle_strip()
|
|
mut theta := f32(0)
|
|
mut xx := f32(0)
|
|
mut yy := f32(0)
|
|
r := radius * ctx.scale
|
|
nx := x * ctx.scale
|
|
ny := y * ctx.scale
|
|
width := w * ctx.scale
|
|
height := h * ctx.scale
|
|
segments := 2 * math.pi * r
|
|
segdiv := segments / 4
|
|
rb := 0
|
|
lb := int(rb + segdiv)
|
|
lt := int(lb + segdiv)
|
|
rt := int(lt + segdiv)
|
|
// left top
|
|
lx := nx + r
|
|
ly := ny + r
|
|
for i in lt .. rt {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + lx, yy + ly)
|
|
sgl.v2f(lx, ly)
|
|
}
|
|
// right top
|
|
mut rx := nx + width - r
|
|
mut ry := ny + r
|
|
for i in rt .. int(segments) {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + rx, yy + ry)
|
|
sgl.v2f(rx, ry)
|
|
}
|
|
// right bottom
|
|
mut rbx := rx
|
|
mut rby := ny + height - r
|
|
for i in rb .. lb {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + rbx, yy + rby)
|
|
sgl.v2f(rbx, rby)
|
|
}
|
|
// left bottom
|
|
mut lbx := lx
|
|
mut lby := ny + height - r
|
|
for i in lb .. lt {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + lbx, yy + lby)
|
|
sgl.v2f(lbx, lby)
|
|
}
|
|
sgl.v2f(lx + xx, ly)
|
|
sgl.v2f(lx, ly)
|
|
sgl.end()
|
|
sgl.begin_quads()
|
|
sgl.v2f(lx, ly)
|
|
sgl.v2f(rx, ry)
|
|
sgl.v2f(rbx, rby)
|
|
sgl.v2f(lbx, lby)
|
|
sgl.end()
|
|
}
|
|
|
|
// Draws the outline of a rounded rectangle
|
|
[deprecated: 'use draw_rounded_rect_empty()']
|
|
pub fn (ctx &Context) draw_empty_rounded_rect(x f32, y f32, w f32, h f32, radius f32, c gx.Color) {
|
|
ctx.draw_rounded_rect_empty(x, y, w, h, radius, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_rounded_rect_empty(x f32, y f32, w f32, h f32, radius f32, c gx.Color) {
|
|
mut theta := f32(0)
|
|
mut xx := f32(0)
|
|
mut yy := f32(0)
|
|
r := radius * ctx.scale
|
|
nx := x * ctx.scale
|
|
ny := y * ctx.scale
|
|
width := w * ctx.scale
|
|
height := h * ctx.scale
|
|
segments := 2 * math.pi * r
|
|
segdiv := segments / 4
|
|
rb := 0
|
|
lb := int(rb + segdiv)
|
|
lt := int(lb + segdiv)
|
|
rt := int(lt + segdiv)
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_line_strip()
|
|
// left top
|
|
lx := nx + r
|
|
ly := ny + r
|
|
for i in lt .. rt {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + lx, yy + ly)
|
|
}
|
|
// right top
|
|
mut rx := nx + width - r
|
|
mut ry := ny + r
|
|
for i in rt .. int(segments) {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + rx, yy + ry)
|
|
}
|
|
// right bottom
|
|
mut rbx := rx
|
|
mut rby := ny + height - r
|
|
for i in rb .. lb {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + rbx, yy + rby)
|
|
}
|
|
// left bottom
|
|
mut lbx := lx
|
|
mut lby := ny + height - r
|
|
for i in lb .. lt {
|
|
theta = 2 * f32(math.pi) * f32(i) / segments
|
|
xx = r * math.cosf(theta)
|
|
yy = r * math.sinf(theta)
|
|
sgl.v2f(xx + lbx, yy + lby)
|
|
}
|
|
sgl.v2f(lx + xx, ly)
|
|
sgl.end()
|
|
}
|
|
|
|
// draw_convex_poly draws a convex polygon, given an array of points, and a color.
|
|
// Note that the points must be given in clockwise order.
|
|
pub fn (ctx &Context) draw_convex_poly(points []f32, c gx.Color) {
|
|
assert points.len % 2 == 0
|
|
len := points.len / 2
|
|
assert len >= 3
|
|
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
|
|
sgl.begin_triangle_strip()
|
|
x0 := points[0] * ctx.scale
|
|
y0 := points[1] * ctx.scale
|
|
for i in 1 .. (len / 2 + 1) {
|
|
sgl.v2f(x0, y0)
|
|
sgl.v2f(points[i * 4 - 2] * ctx.scale, points[i * 4 - 1] * ctx.scale)
|
|
sgl.v2f(points[i * 4] * ctx.scale, points[i * 4 + 1] * ctx.scale)
|
|
}
|
|
|
|
if len % 2 == 0 {
|
|
sgl.v2f(points[2 * len - 2] * ctx.scale, points[2 * len - 1] * ctx.scale)
|
|
}
|
|
sgl.end()
|
|
}
|
|
|
|
// draw_empty_poly - draws the borders of a polygon, given an array of points, and a color.
|
|
// Note that the points must be given in clockwise order.
|
|
[deprecated: 'use draw_poly_empty() instead']
|
|
pub fn (ctx &Context) draw_empty_poly(points []f32, c gx.Color) {
|
|
ctx.draw_poly_empty(points, c)
|
|
}
|
|
|
|
pub fn (ctx &Context) draw_poly_empty(points []f32, c gx.Color) {
|
|
assert points.len % 2 == 0
|
|
len := points.len / 2
|
|
assert len >= 3
|
|
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
|
|
sgl.begin_line_strip()
|
|
for i in 0 .. len {
|
|
sgl.v2f(points[2 * i] * ctx.scale, points[2 * i + 1] * ctx.scale)
|
|
}
|
|
sgl.v2f(points[0] * ctx.scale, points[1] * ctx.scale)
|
|
sgl.end()
|
|
}
|
|
|
|
// draw_cubic_bezier draws a cubic Bézier curve, also known as a spline, from four points.
|
|
// The four points is provided as one `points` array which contains a stream of point pairs (x and y coordinates).
|
|
// Thus a cubic Bézier could be declared as: `points := [x1, y1, control_x1, control_y1, control_x2, control_y2, x2, y2]`.
|
|
// Please see `draw_cubic_bezier_in_steps` to control the amount of steps (segments) used to draw the curve.
|
|
pub fn (ctx &Context) draw_cubic_bezier(points []f32, c gx.Color) {
|
|
ctx.draw_cubic_bezier_in_steps(points, u32(30 * ctx.scale), c)
|
|
}
|
|
|
|
// draw_cubic_bezier_in_steps draws a cubic Bézier curve, also known as a spline, from four points.
|
|
// The smoothness of the curve can be controlled with the `steps` parameter. `steps` determines how many iterations is
|
|
// taken to draw the curve.
|
|
// The four points is provided as one `points` array which contains a stream of point pairs (x and y coordinates).
|
|
// Thus a cubic Bézier could be declared as: `points := [x1, y1, control_x1, control_y1, control_x2, control_y2, x2, y2]`.
|
|
pub fn (ctx &Context) draw_cubic_bezier_in_steps(points []f32, steps u32, c gx.Color) {
|
|
assert steps > 0
|
|
assert points.len == 8
|
|
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
|
|
sgl.begin_line_strip()
|
|
|
|
p1_x, p1_y := points[0], points[1]
|
|
p2_x, p2_y := points[6], points[7]
|
|
|
|
ctrl_p1_x, ctrl_p1_y := points[2], points[3]
|
|
ctrl_p2_x, ctrl_p2_y := points[4], points[5]
|
|
|
|
// The constant 3 is actually points.len() - 1;
|
|
|
|
step := f32(1.0) / steps
|
|
sgl.v2f(p1_x * ctx.scale, p1_y * ctx.scale)
|
|
for u := f32(0.0); u <= f32(1.0); u += step {
|
|
pow_2_u := u * u
|
|
pow_3_u := pow_2_u * u
|
|
|
|
x := pow_3_u * (p2_x + 3 * (ctrl_p1_x - ctrl_p2_x) - p1_x) +
|
|
3 * pow_2_u * (p1_x - 2 * ctrl_p1_x + ctrl_p2_x) + 3 * u * (ctrl_p1_x - p1_x) + p1_x
|
|
|
|
y := pow_3_u * (p2_y + 3 * (ctrl_p1_y - ctrl_p2_y) - p1_y) +
|
|
3 * pow_2_u * (p1_y - 2 * ctrl_p1_y + ctrl_p2_y) + 3 * u * (ctrl_p1_y - p1_y) + p1_y
|
|
|
|
sgl.v2f(x * ctx.scale, y * ctx.scale)
|
|
}
|
|
sgl.v2f(p2_x * ctx.scale, p2_y * ctx.scale)
|
|
|
|
sgl.end()
|
|
}
|
|
|
|
// window_size returns the `Size` of the active window
|
|
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 dpi_scale() f32 {
|
|
mut s := sapp.dpi_scale()
|
|
$if android {
|
|
s *= android_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 s < 0.1 {
|
|
s = 1.0
|
|
}
|
|
return s
|
|
}
|
|
|
|
[deprecated: 'use draw_ellipse_filled() instead']
|
|
pub fn (ctx &Context) draw_ellipse(x f32, y f32, r_horizontal f32, r_vertical f32, c gx.Color) {
|
|
ctx.draw_ellipse_filled(x, y, r_horizontal, r_vertical, c)
|
|
}
|
|
|
|
// draw_ellipse_filled draws an opaque elipse, with a center at x,y , filled with the color `c`
|
|
pub fn (ctx &Context) draw_ellipse_filled(x f32, y f32, r_horizontal f32, r_vertical f32, c gx.Color) {
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_triangle_strip()
|
|
for i := 0; i < 360; i += 10 {
|
|
sgl.v2f(x, y)
|
|
sgl.v2f(x + math.sinf(f32(math.radians(i))) * r_horizontal, y +
|
|
math.cosf(f32(math.radians(i))) * r_vertical)
|
|
sgl.v2f(x + math.sinf(f32(math.radians(i + 10))) * r_horizontal, y +
|
|
math.cosf(f32(math.radians(i + 10))) * r_vertical)
|
|
}
|
|
sgl.end()
|
|
}
|
|
|
|
[deprecated: 'use draw_ellipse_empty() instead']
|
|
pub fn (ctx &Context) draw_empty_ellipse(x f32, y f32, r_horizontal f32, r_vertical f32, c gx.Color) {
|
|
ctx.draw_ellipse_empty(x, y, r_horizontal, r_vertical, c)
|
|
}
|
|
|
|
// draw_ellipse_empty draws the outline of an ellipse, with a center at x,y
|
|
pub fn (ctx &Context) draw_ellipse_empty(x f32, y f32, r_horizontal f32, r_vertical f32, c gx.Color) {
|
|
if c.a != 255 {
|
|
sgl.load_pipeline(ctx.timage_pip)
|
|
}
|
|
|
|
sgl.c4b(c.r, c.g, c.b, c.a)
|
|
sgl.begin_line_strip()
|
|
for i := 0; i < 360; i += 10 {
|
|
sgl.v2f(x + math.sinf(f32(math.radians(i))) * r_horizontal, y +
|
|
math.cosf(f32(math.radians(i))) * r_vertical)
|
|
sgl.v2f(x + math.sinf(f32(math.radians(i + 10))) * r_horizontal, y +
|
|
math.cosf(f32(math.radians(i + 10))) * r_vertical)
|
|
}
|
|
sgl.end()
|
|
}
|