441 lines
9.9 KiB
V
441 lines
9.9 KiB
V
// Copyright (c) 2019 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 stbi
|
|
import glm
|
|
import gl
|
|
import gx
|
|
import os
|
|
import glfw
|
|
|
|
struct Vec2 {
|
|
pub:
|
|
x int
|
|
y int
|
|
}
|
|
|
|
pub fn vec2(x, y int) Vec2 {
|
|
res := Vec2 {
|
|
x: x
|
|
y: y
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub fn init() {
|
|
glfw.init()
|
|
println(gl.TEXT_VERT)
|
|
gl.init_glad()
|
|
}
|
|
|
|
|
|
struct Cfg {
|
|
pub:
|
|
width int
|
|
height int
|
|
use_ortho bool
|
|
retina bool
|
|
|
|
font_size int
|
|
font_path string
|
|
create_window bool
|
|
window_user_ptr voidptr
|
|
window_title string
|
|
always_on_top bool
|
|
scale int
|
|
}
|
|
|
|
struct GG {
|
|
shader gl.Shader
|
|
// use_ortho bool
|
|
width int
|
|
height int
|
|
vao u32
|
|
rect_vao u32
|
|
rect_vbo u32
|
|
line_vao u32
|
|
line_vbo u32
|
|
vbo u32
|
|
scale int // retina = 2 , normal = 1
|
|
pub mut:
|
|
window *glfw.Window
|
|
render_fn fn()
|
|
}
|
|
|
|
|
|
// fn new_context(width, height int, use_ortho bool, font_size int) *GG {
|
|
pub fn new_context(cfg Cfg) *GG {
|
|
mut window := &glfw.Window{!}
|
|
if cfg.create_window {
|
|
window = glfw.create_window(glfw.WinCfg{
|
|
title: cfg.window_title
|
|
width: cfg.width
|
|
height: cfg.height
|
|
ptr: cfg.window_user_ptr
|
|
always_on_top: cfg.always_on_top
|
|
})
|
|
window.make_context_current()
|
|
init()
|
|
}
|
|
shader := gl.new_shader('simple')
|
|
shader.use()
|
|
if cfg.use_ortho {
|
|
projection := glm.ortho(0, cfg.width, cfg.height, 0)
|
|
shader.set_mat4('projection', projection)
|
|
}
|
|
else {
|
|
// TODO move to function (allow volt functions to return arrrays without allocations)
|
|
// i := glm.identity3()
|
|
shader.set_mat4('projection', glm.identity())
|
|
}
|
|
vao := gl.gen_vertex_array()
|
|
//println('new gg context VAO=$VAO')
|
|
vbo := gl.gen_buffer()
|
|
mut scale := 1
|
|
if cfg.retina {
|
|
scale = 2
|
|
}
|
|
//gl.enable(GL_BLEND)
|
|
//# glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
//println('new gg text context VAO=$VAO')
|
|
//gl.bind_vao(VAO)
|
|
//gl.bind_buffer(GL_ARRAY_BUFFER, VBO)
|
|
//gl.enable_vertex_attrib_array(0)
|
|
//gl.vertex_attrib_pointer(0, 4, GL_FLOAT, false, 4, 0)
|
|
todo_remove_me(cfg, scale)
|
|
return &GG {
|
|
shader: shader
|
|
width: cfg.width
|
|
height: cfg.height
|
|
vao: vao
|
|
vbo: vbo
|
|
window: window
|
|
|
|
// /line_vao: gl.gen_vertex_array()
|
|
// /line_vbo: gl.gen_buffer()
|
|
//text_ctx: new_context_text(cfg, scale),
|
|
scale: scale
|
|
// use_ortho: use_ortho
|
|
}
|
|
|
|
// ctx.init_rect_vao()
|
|
//return ctx
|
|
}
|
|
|
|
/*
|
|
pub fn (gg &GG) render_loop() bool {
|
|
for !gg.window.show_close() {
|
|
gg.render_fn()
|
|
gg.window.swap_buffers()
|
|
glfw.wait_events()
|
|
}
|
|
}
|
|
*/
|
|
|
|
pub fn clear(color gx.Color) {
|
|
gl.clear()
|
|
gl.clear_color(255, 255, 255, 255)
|
|
}
|
|
|
|
pub fn (gg &GG) render() {
|
|
gg.window.swap_buffers()
|
|
glfw.wait_events()
|
|
}
|
|
|
|
pub fn (ctx &GG) draw_triangle(x1, y1, x2, y2, x3, y3 f32, c gx.Color) {
|
|
// println('draw_triangle $x1,$y1 $x2,$y2 $x3,$y3')
|
|
ctx.shader.use()
|
|
ctx.shader.set_color('color', c)
|
|
vertices := [
|
|
x1, y1, 0,
|
|
x2, y2, 0,
|
|
x3, y3, 0,
|
|
] !
|
|
// bind the Vertex Array Object first, then bind and set vertex buffer(s),
|
|
// and then configure vertex attributes(s).
|
|
gl.bind_vao(ctx.vao)
|
|
gl.set_vbo(ctx.vbo, vertices, C.GL_STATIC_DRAW)
|
|
gl.vertex_attrib_pointer(0, 3, C.GL_FLOAT, false, 3, 0)
|
|
gl.enable_vertex_attrib_array(0)
|
|
// gl.bind_buffer(GL_ARRAY_BUFFER, uint(0))
|
|
// You can unbind the VAO afterwards so other VAO calls won't accidentally modify this VAO,
|
|
// but this rarely happens. Modifying other
|
|
// VAOs requires a call to glBindVertexArray anyways so we generally don't unbind VAOs
|
|
// (nor VBOs) when it's not directly necessary.
|
|
// gl.bind_vertex_array(uint(0))
|
|
// gl.bind_vertex_array(ctx.VAO)
|
|
gl.draw_arrays(C.GL_TRIANGLES, 0, 3)
|
|
}
|
|
|
|
pub fn (ctx &GG) draw_triangle_tex(x1, y1, x2, y2, x3, y3 f32, c gx.Color) {
|
|
ctx.shader.use()
|
|
ctx.shader.set_color('color', c)
|
|
ctx.shader.set_int('has_texture', 1)
|
|
vertices := [
|
|
x1, y1, 0, 0, 0, 0, 1, 1,
|
|
x2, y2, 0, 0, 0, 0, 1, 0,
|
|
x3, y3, 0, 0, 0, 0, 0, 0,
|
|
] !
|
|
gl.bind_vao(ctx.vao)
|
|
gl.set_vbo(ctx.vbo, vertices, C.GL_STATIC_DRAW)
|
|
// position attribute
|
|
gl.vertex_attrib_pointer(0, 3, C.GL_FLOAT, false, 3, 0)
|
|
gl.enable_vertex_attrib_array(0)
|
|
// color attribute
|
|
gl.vertex_attrib_pointer(1, 3, C.GL_FLOAT, false, 8, 3)
|
|
gl.enable_vertex_attrib_array(1)
|
|
// texture attribute
|
|
gl.vertex_attrib_pointer(2, 2, C.GL_FLOAT, false, 8, 6)
|
|
gl.enable_vertex_attrib_array(2)
|
|
// /
|
|
// gl.draw_arrays(GL_TRIANGLES, 0, 3)
|
|
gl.draw_elements(C.GL_TRIANGLES, 6, C.GL_UNSIGNED_INT, 0)
|
|
}
|
|
|
|
pub fn (ctx &GG) draw_rect(x, y, w, h f32, c gx.Color) {
|
|
// println('gg.draw_rect($x,$y,$w,$h)')
|
|
// wrong order
|
|
// // ctx.draw_triangle(x, y, x + w, y, x + w, y + h, c)
|
|
// // ctx.draw_triangle(x, y, x, y + h, x + w, y + h, c)
|
|
// good order. counter clock wise
|
|
// ctx.draw_triangle(x, y, x, y + h, x + w, y + h, c)
|
|
// ctx.draw_triangle(x, y, x + w, y + h, x + w, y, c)
|
|
ctx.draw_rect2(x, y, w, h, c)
|
|
}
|
|
|
|
/*
|
|
fn (ctx mut GG) init_rect_vao() {
|
|
|
|
ctx.rect_vao = gl.gen_vertex_array()
|
|
ctx.rect_vbo = gl.gen_buffer()
|
|
vertices := [
|
|
x + w, y, 0,
|
|
x + w, y + h, 0,
|
|
x, y + h, 0,
|
|
x, y, 0,
|
|
] !
|
|
indices := [
|
|
0, 1, 3,// first triangle
|
|
1, 2, 3// second triangle
|
|
] !
|
|
gl.bind_vao(ctx.rect_vao)
|
|
gl.set_vbo(ctx.rect_vbo, vertices, C.GL_STATIC_DRAW)
|
|
ebo := gl.gen_buffer()
|
|
// ///////
|
|
gl.set_ebo(ebo, indices, C.GL_STATIC_DRAW)
|
|
}
|
|
*/
|
|
pub fn (ctx &GG) draw_rect2(x, y, w, h f32, c gx.Color) {
|
|
C.glDeleteBuffers(1, &ctx.vao)
|
|
C.glDeleteBuffers(1, &ctx.vbo)
|
|
ctx.shader.use()
|
|
ctx.shader.set_color('color', c)
|
|
ctx.shader.set_int('has_texture', 0)
|
|
// 4--1
|
|
// 3--2
|
|
$if linux {
|
|
// y += h
|
|
}
|
|
vertices := [
|
|
x + w, y, 0,
|
|
x + w, y + h, 0,
|
|
x, y + h, 0,
|
|
x, y, 0,
|
|
] !
|
|
indices := [
|
|
0, 1, 3,// first triangle
|
|
1, 2, 3// second triangle
|
|
] !
|
|
gl.bind_vao(ctx.vao)
|
|
gl.set_vbo(ctx.vbo, vertices, C.GL_STATIC_DRAW)
|
|
ebo := gl.gen_buffer()
|
|
// ///////
|
|
gl.set_ebo(ebo, indices, C.GL_STATIC_DRAW)// !!! LEAKS
|
|
// /////
|
|
gl.vertex_attrib_pointer(0, 3, C.GL_FLOAT, false, 3, 0)
|
|
gl.enable_vertex_attrib_array(0)
|
|
// gl.bind_vao(ctx.rect_vao)
|
|
gl.bind_vao(ctx.vao)
|
|
gl.draw_elements(C.GL_TRIANGLES, 6, C.GL_UNSIGNED_INT, 0)
|
|
C.glDeleteBuffers(1, &ebo)
|
|
}
|
|
|
|
fn todo_remove_me(cfg Cfg, scale int) {
|
|
// Can only have text in ortho mode
|
|
if !cfg.use_ortho {
|
|
return
|
|
}
|
|
mut width := cfg.width * scale
|
|
mut height := cfg.height * scale
|
|
font_size := cfg.font_size * scale
|
|
gl.enable(C.GL_BLEND)
|
|
//# glBlendFunc(C.GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
shader := gl.new_shader('text')
|
|
shader.use()
|
|
projection := glm.ortho(0, width, 0, height)// 0 at BOT
|
|
// projection_new := ortho(0, width, 0, height)// 0 at BOT
|
|
// projection := gl.ortho(0, width,height,0) // 0 at TOP
|
|
shader.set_mat4('projection', projection)
|
|
vao := gl.gen_vertex_array()
|
|
//println('new gg text context VAO=$VAO')
|
|
vbo := gl.gen_buffer()
|
|
gl.bind_vao(vao)
|
|
gl.bind_buffer(C.GL_ARRAY_BUFFER, vbo)
|
|
gl.enable_vertex_attrib_array(0)
|
|
gl.vertex_attrib_pointer(0, 4, C.GL_FLOAT, false, 4, 0)
|
|
}
|
|
|
|
fn update() {
|
|
// # ui__post_empty_event();
|
|
}
|
|
|
|
pub fn post_empty_event() {
|
|
glfw.post_empty_event()
|
|
}
|
|
|
|
pub fn (c GG) circle(x, y, r int) {
|
|
}
|
|
|
|
fn (c GG) fill_color(color gx.Color) {
|
|
}
|
|
|
|
fn (c GG) fill() {
|
|
}
|
|
|
|
fn (c GG) move_to(x, y int) {
|
|
}
|
|
|
|
fn (c GG) line_to(x, y int) {
|
|
}
|
|
|
|
fn (c GG) stroke_width(size int) {
|
|
}
|
|
|
|
fn (c GG) stroke_color(color gx.Color) {
|
|
}
|
|
|
|
fn (c GG) stroke() {
|
|
}
|
|
|
|
fn (c GG) save() {
|
|
}
|
|
|
|
fn (c GG) restore() {
|
|
}
|
|
|
|
fn (c GG) intersect_scissor(x, y, w, h int) {
|
|
}
|
|
|
|
fn (c GG) translate(x, y int) {
|
|
}
|
|
|
|
fn (c GG) create_font(name, file string) int {
|
|
return 0
|
|
}
|
|
|
|
fn (c GG) text(x, y int, text string) {
|
|
}
|
|
|
|
fn (c GG) text_box(x, y, max int, text string) {
|
|
}
|
|
|
|
fn (c GG) font_face(f string) {
|
|
}
|
|
|
|
fn (c GG) font_size(size int) {
|
|
}
|
|
|
|
fn (c GG) text_align(a int) {
|
|
}
|
|
|
|
pub fn create_image(file string) u32 {
|
|
println('gg create image "$file"')
|
|
if file.contains('twitch') {
|
|
return u32(0)// TODO
|
|
}
|
|
if !os.file_exists(file) {
|
|
println('gg create image no such file "$file"')
|
|
return u32(0)
|
|
}
|
|
texture := gl.gen_texture()
|
|
img := stbi.load(file)
|
|
gl.bind_2d_texture(texture)
|
|
img.tex_image_2d()
|
|
gl.generate_mipmap(C.GL_TEXTURE_2D)
|
|
img.free()
|
|
// println('gg end')
|
|
return texture
|
|
}
|
|
|
|
pub fn (ctx &GG) draw_line_c(x, y, x2, y2 f32, color gx.Color) {
|
|
C.glDeleteBuffers(1, &ctx.vao)
|
|
C.glDeleteBuffers(1, &ctx.vbo)
|
|
ctx.shader.use()
|
|
ctx.shader.set_color('color', color)
|
|
vertices := [f32(x), f32(y), f32(x2), f32(y2)] !
|
|
gl.bind_vao(ctx.vao)
|
|
gl.set_vbo(ctx.vbo, vertices, C.GL_STATIC_DRAW)
|
|
gl.vertex_attrib_pointer(0, 2, C.GL_FLOAT, false, 2, 0)
|
|
gl.enable_vertex_attrib_array(0)
|
|
gl.bind_vao(ctx.vao)
|
|
gl.draw_arrays(C.GL_LINES, 0, 2)
|
|
}
|
|
|
|
pub fn (c &GG) draw_line(x, y, x2, y2 f32) {
|
|
c.draw_line_c(x, y, x2, y2, gx.Gray)
|
|
}
|
|
|
|
pub fn (c &GG) draw_vertical(x, y, height int) {
|
|
c.draw_line(x, y, x, y + height)
|
|
}
|
|
|
|
|
|
//ctx.gg.draw_line(center + prev_x, center+prev_y, center + x*10.0, center+y)
|
|
|
|
// fn (ctx &GG) draw_image(x, y, w, h f32, img stbi.Image) {
|
|
pub fn (ctx &GG) draw_image(x, y, w, h f32, tex_id u32) {
|
|
// println('DRAW IMAGE $x $y $w $h $tex_id')
|
|
ctx.shader.use()
|
|
// ctx.shader.set_color('color', c)
|
|
ctx.shader.set_int('has_texture', 1)
|
|
// 4--1
|
|
// | |
|
|
// 3--2
|
|
vertices := [
|
|
x + w, y, 0, 1, 0, 0, 1, 1,
|
|
x + w, y + h, 0, 0, 1, 0, 1, 0,
|
|
x, y + h, 0, 0, 0, 1, 0, 0,
|
|
x, y, 0, 1, 1, 0, 0, 1,
|
|
] !
|
|
indices := [
|
|
0, 1, 3,// first triangle
|
|
1, 2, 3// second triangle
|
|
] !
|
|
// VAO := gl.gen_vertex_array()
|
|
// VBO := gl.gen_buffer()
|
|
gl.bind_vao(ctx.vao)
|
|
gl.set_vbo(ctx.vbo, vertices, C.GL_STATIC_DRAW)
|
|
ebo := gl.gen_buffer()
|
|
gl.set_ebo(ebo, indices, C.GL_STATIC_DRAW)
|
|
gl.vertex_attrib_pointer(0, 3, C.GL_FLOAT, false, 8, 0)
|
|
gl.enable_vertex_attrib_array(0)
|
|
gl.vertex_attrib_pointer(1, 3, C.GL_FLOAT, false, 8, 3)
|
|
gl.enable_vertex_attrib_array(1)
|
|
gl.vertex_attrib_pointer(2, 2, C.GL_FLOAT, false, 8, 6)
|
|
gl.enable_vertex_attrib_array(2)
|
|
gl.bind_2d_texture(u32(tex_id))
|
|
gl.bind_vao(ctx.vao)
|
|
gl.draw_elements(C.GL_TRIANGLES, 6, C.GL_UNSIGNED_INT, 0)
|
|
}
|
|
|
|
pub fn (c &GG) draw_empty_rect(x, y, w, h int, color gx.Color) {
|
|
c.draw_line_c(x, y, x + w, y, color)
|
|
c.draw_line_c(x, y, x, y + h, color)
|
|
c.draw_line_c(x, y + h, x + w, y + h, color)
|
|
c.draw_line_c(x + w, y, x + w, y + h, color)
|
|
}
|
|
|