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v/vlib/gg/gg.v
2020-08-04 13:18:08 +03:00

390 lines
9.2 KiB
V

// Copyright (c) 2019-2020 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 gx
import os
import sokol
import sokol.sapp
import sokol.sgl
import sokol.gfx
import stbi
// import time
pub type FNCb = fn (x voidptr)
pub type FNEvent = fn (e, x voidptr)
pub type FNFail = fn (msg string, x voidptr)
pub type FNKeyDown = fn (c sapp.KeyCode, m sapp.Modifier, x voidptr)
pub type FNChar = fn (c u32, x voidptr)
pub struct Config {
pub:
width int
height int
use_ortho bool
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)
cleanup_fn FNCb = voidptr(0)
fail_fn FNFail = voidptr(0)
event_fn FNEvent = voidptr(0)
keydown_fn FNKeyDown = voidptr(0) // special case of event_fn
char_fn FNChar = voidptr(0) // special case of event_fn
wait_events bool // set this to true for UIs, to save power
fullscreen bool
scale f32 = 1.0 // vid needs this
// init_text bool
font_path string
}
pub struct Context {
render_text 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
}
pub struct Size {
pub:
width int
height int
}
fn gg_init_sokol_window(user_data voidptr) {
mut g := &Context(user_data)
desc := C.sg_desc{
mtl_device: sapp.metal_get_device()
mtl_renderpass_descriptor_cb: sapp.metal_get_renderpass_descriptor
mtl_drawable_cb: sapp.metal_get_drawable
d3d11_device: sapp.d3d11_get_device()
d3d11_device_context: sapp.d3d11_get_device_context()
d3d11_render_target_view_cb: sapp.d3d11_get_render_target_view
d3d11_depth_stencil_view_cb: sapp.d3d11_get_depth_stencil_view
}
gfx.setup(&desc)
sgl_desc := C.sgl_desc_t{}
sgl.setup(&sgl_desc)
g.scale = sapp.dpi_scale()
// NB: on older X11, `Xft.dpi` from ~/.Xresources, that sokol uses,
// may not be set which leads to sapp.dpi_scale reporting incorrectly 0.0
if g.scale < 0.1 {
g.scale = 1.0
}
// is_high_dpi := sapp.high_dpi()
// fb_w := sapp.width()
// fb_h := sapp.height()
// println('g.scale=$g.scale is_high_dpi=$is_high_dpi fb_w=$fb_w fb_h=$fb_h')
// if g.config.init_text {
if g.config.font_path != '' {
// t := time.ticks()
g.ft = new_ft({
font_path: g.config.font_path
scale: sapp.dpi_scale()
}) or {
panic(err)
}
// println('FT took ${time.ticks()-t} ms')
g.font_inited = true
}
//
mut pipdesc := C.sg_pipeline_desc{}
unsafe { C.memset(&pipdesc, 0, sizeof(pipdesc)) }
pipdesc.blend.enabled = true
pipdesc.blend.src_factor_rgb = C.SG_BLENDFACTOR_SRC_ALPHA
pipdesc.blend.dst_factor_rgb = C.SG_BLENDFACTOR_ONE_MINUS_SRC_ALPHA
g.timage_pip = sgl.make_pipeline(&pipdesc)
//
if g.config.init_fn != voidptr(0) {
g.config.init_fn(g.config.user_data)
}
}
fn gg_frame_fn(user_data voidptr) {
mut g := &Context(user_data)
if g.config.frame_fn != voidptr(0) {
g.config.frame_fn(g.config.user_data)
}
}
// TODO: remove this hacky workaround...
// NB: todo_remove_this is needed to workaround a v bug,
// where it thinks that &sapp.Event(x) is a function call,
// instead of a cast, if v has not yet seen &sapp.Event used
// as a parameter type.
fn todo_remove_this(e &sapp.Event) {
}
fn gg_event_fn(ce &C.sapp_event, user_data voidptr) {
e := &sapp.Event(ce)
mut g := &Context(user_data)
if g.config.event_fn != voidptr(0) {
g.config.event_fn(e, g.config.user_data)
}
match e.typ {
.key_down {
if g.config.keydown_fn != voidptr(0) {
kdfn := g.config.keydown_fn
kdfn(e.key_code, e.modifiers, g.config.user_data)
}
}
.char {
if g.config.char_fn != voidptr(0) {
cfn := g.config.char_fn
cfn(e.char_code, g.config.user_data)
}
}
else {}
}
}
fn gg_cleanup_fn(user_data voidptr) {
mut g := &Context(user_data)
if g.config.cleanup_fn != voidptr(0) {
g.config.cleanup_fn(g.config.user_data)
}
}
fn gg_fail_fn(msg charptr, user_data voidptr) {
mut g := &Context(user_data)
vmsg := tos3(msg)
if g.config.fail_fn != voidptr(0) {
g.config.fail_fn(vmsg, g.config.user_data)
} else {
eprintln('gg error: $vmsg')
}
}
//
pub fn new_context(cfg Config) &Context {
mut g := &Context{
width: cfg.width
height: cfg.height
clear_pass: gfx.create_clear_pass(f32(cfg.bg_color.r) / 255.0, f32(cfg.bg_color.g) / 255.0,
f32(cfg.bg_color.b) / 255.0, 1.0)
config: cfg
render_text: cfg.font_path != ''
ft: 0
}
// C.printf('new_context() %p\n', cfg.user_data)
window := C.sapp_desc{
user_data: g
init_userdata_cb: gg_init_sokol_window
frame_userdata_cb: gg_frame_fn
event_userdata_cb: gg_event_fn
fail_userdata_cb: gg_fail_fn
cleanup_userdata_cb: gg_cleanup_fn
window_title: cfg.window_title.str
html5_canvas_name: cfg.window_title.str
width: cfg.width
height: cfg.height
high_dpi: true
fullscreen: cfg.fullscreen
}
if cfg.use_ortho {
} else {
}
g.window = window
return g
}
pub fn (gg &Context) run() {
sapp.run(&gg.window)
}
pub fn (ctx &Context) draw_rect(x, y, w, h f32, c gx.Color) {
sgl.c4b(c.r, c.g, c.b, 255)
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()
}
pub fn (ctx &Context) draw_empty_rect(x, y, w, h f32, c gx.Color) {
sgl.c4b(c.r, c.g, c.b, 255)
sgl.begin_line_strip()
if ctx.scale == 1 {
sgl.v2f(x, y)
sgl.v2f(x + w, y)
sgl.v2f(x + w, y + h)
sgl.v2f(x, y + h)
sgl.v2f(x, y)
} else {
sgl.v2f(x * ctx.scale, y * ctx.scale)
sgl.v2f((x + w) * ctx.scale, y * ctx.scale)
sgl.v2f((x + w) * ctx.scale, (y + h) * ctx.scale)
sgl.v2f(x * ctx.scale, (y + h) * ctx.scale)
sgl.v2f(x * ctx.scale, y * ctx.scale)
}
sgl.end()
}
pub fn (ctx &Context) draw_circle(x, y, r f32, c gx.Color) {
}
pub struct Image {
pub mut:
width int
height int
nr_channels int
ok bool
data voidptr
ext string
simg_ok bool
simg C.sg_image
}
pub fn create_image(file string) Image {
if !os.exists(file) {
println('gg.create_image(): file not found: $file')
return Image{} // none
}
stb_img := stbi.load(file)
mut img := Image{
width: stb_img.width
height: stb_img.height
nr_channels: stb_img.nr_channels
ok: stb_img.ok
data: stb_img.data
ext: stb_img.ext
}
return img
}
pub fn create_image_from_memory(buf byteptr, bufsize int) Image {
stb_img := stbi.load_from_memory(buf, bufsize)
mut img := Image{
width: stb_img.width
height: stb_img.height
nr_channels: stb_img.nr_channels
ok: stb_img.ok
data: stb_img.data
ext: stb_img.ext
}
return img
}
pub fn create_image_from_byte_array(b []byte) Image {
return create_image_from_memory(b.data, b.len)
}
pub fn (mut img Image) init_sokol_image() &Image {
mut img_desc := C.sg_image_desc{
width: img.width
height: img.height
num_mipmaps: 0
wrap_u: .clamp_to_edge
wrap_v: .clamp_to_edge
label: &byte(0)
d3d11_texture: 0
}
img_desc.content.subimage[0][0] = C.sg_subimage_content{
ptr: img.data
size: img.nr_channels * img.width * img.height
}
img.simg = C.sg_make_image(&img_desc)
img.simg_ok = true
return img
}
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)
}
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()
}
}
pub fn (ctx &Context) draw_line(x, y, x2, y2 f32, c gx.Color) {
sgl.c4b(c.r, c.g, c.b, 255)
sgl.begin_line_strip()
sgl.v2f(x * ctx.scale, y * ctx.scale)
sgl.v2f(x2 * ctx.scale, y2 * ctx.scale)
sgl.end()
}
pub fn (ctx &Context) draw_image(x, y, width, height f32, img &Image) {
if !img.simg_ok {
unsafe {
mut image := img
image.init_sokol_image()
}
}
u0 := f32(0.0)
v0 := f32(0.0)
u1 := f32(1.0)
v1 := f32(1.0)
x0 := f32(x) * ctx.scale
y0 := f32(y) * ctx.scale
x1 := f32(x + width) * ctx.scale
y1 := f32(y + height) * ctx.scale
//
sgl.load_pipeline(ctx.timage_pip)
sgl.enable_texture()
sgl.texture(img.simg)
sgl.begin_quads()
sgl.c4b(255, 255, 255, 255)
sgl.v2f_t2f(x0, y0, u0, v0)
sgl.v2f_t2f(x1, y0, u1, v0)
sgl.v2f_t2f(x1, y1, u1, v1)
sgl.v2f_t2f(x0, y1, u0, v1)
sgl.end()
sgl.disable_texture()
}
pub fn (ctx &Context) draw_rounded_rect(x, y, width, height, radius f32, color gx.Color) {
}
pub fn (ctx &Context) draw_empty_rounded_rect(x, y, width, height, radius f32, border_color gx.Color) {
}
fn C.WaitMessage()
pub fn wait_events() {
unsafe {
$if macos {
#NSEvent *event = [NSApp nextEventMatchingMask:NSEventMaskAny
#untilDate:[NSDate distantFuture]
#inMode:NSDefaultRunLoopMode
#dequeue:YES];
#[NSApp sendEvent:event];
}
$if windows {
C.WaitMessage()
}
}
}