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// Copyright 2023 Gabriel Jensen.
use crate::dw::app::{App, GOTINT};
use crate::dw::app::Gfx;
extern crate gl;
extern crate glfw;
use gl::{ARRAY_BUFFER, BindBuffer, BufferData, BindVertexArray, BufferSubData, Clear, ClearColor, COLOR_BUFFER_BIT, DrawArrays, EnableVertexAttribArray, FALSE, FLOAT, GenBuffers, GenVertexArrays, STREAM_DRAW, TRIANGLES, Uniform1f, UseProgram, VertexAttribPointer, Viewport};
use gl::types::{GLfloat, GLsizeiptr, GLuint};
use glfw::Context;
use std::ffi::c_void;
use std::mem::{size_of, size_of_val};
use std::ptr::{addr_of, null};
use std::sync::atomic::Ordering;
impl App {
pub fn lop(&mut self, gfx: &mut Gfx) -> i8 {
eprintln!("entering main loop");
let vtx: [GLfloat; 0x9] = [
-1.0,-1.0,0.0,
1.0,-1.0,0.0,
-1.0, 1.0,0.0,
];
let mut vao: GLuint = 0x0;
let mut vbo: GLuint = 0x0;
unsafe {
GenVertexArrays(0x1,&mut vao);
GenBuffers(0x1,&mut vbo);
BindVertexArray(vao);
BindBuffer(ARRAY_BUFFER,vbo);
BufferData(ARRAY_BUFFER,size_of_val(& vtx) as GLsizeiptr, addr_of!(vtx) as *const c_void, STREAM_DRAW);
VertexAttribPointer(0x0, 0x3, FLOAT, FALSE, (0x3*size_of::<GLfloat>()) as i32, null::<c_void>());
EnableVertexAttribArray(0x0);
}
gfx.glfw.set_time(0.0);
while !gfx.win.should_close() {
unsafe {
if GOTINT.load(Ordering::Relaxed) {
eprintln!("got interrupt");
gfx.win.set_should_close(true);
}
}
gfx.glfw.poll_events();
unsafe {
let (frmwdh, frmhgh) = gfx.win.get_framebuffer_size();
Viewport(0x0,0x0,frmwdh,frmhgh);
ClearColor(0.107, 0.690, 0.939, 1.0);
Clear(COLOR_BUFFER_BIT);
BindBuffer(ARRAY_BUFFER, vbo);
BufferSubData(ARRAY_BUFFER, 0x0, size_of_val(& vtx) as GLsizeiptr, addr_of!(vtx) as *const c_void);
UseProgram(gfx.shdprg);
Uniform1f(gfx.uni,(gfx.glfw.get_time()/16.0).powf(2.0) as f32);
BindVertexArray(vao);
DrawArrays(TRIANGLES, 0x0, 0x3*0x1);
}
gfx.win.swap_buffers();
}
return -0x45;
}
}
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