1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

use super::super::shader::uniform::*;
use crate::lib::*;
use crate::GL::{tex::*, Fbo};

#[macro_export]
macro_rules! ComputeShader {
	($shd: ident, ($n0: literal, $samp: ident, $slab: ident)$(, $($args: tt),+)?) => {{
		let mut fbo = &mut $slab.tgt;
		let src = &$slab.src.tex;
		ComputeShader!($shd, fbo, ($n0, $samp, src)$(, $($args),+)?);
		$slab.swap();
	}};
	($shd: ident, $fbo: expr) => {{
		$fbo.clear((0, 1));
		$fbo.bind();
		let _ = $shd.Bind();
		Screen::Draw();
	}};
	($shd: ident, $fbo: expr, ($n0: literal, $v0: expr)) => {{
		$fbo.clear((0, 1));
		$fbo.bind();
		let s = $shd.Bind();
		let _ = Uniform!(s, ($n0, $v0));
		let _ = ComputeShader!($shd, $fbo);
	}};
	($shd: ident, $fbo: expr, ($n0: literal, $s0: ident, $t0: expr)) => {{
		$fbo.clear((0, 1));
		$fbo.bind();
		let s = $shd.Bind();
		let b = $t0.Bind(&$s0);
		let _ = Uniform!(s, ($n0, &b));
		let _ = ComputeShader!($shd, $fbo);
	}};
	($shd: ident, $fbo: expr, ($n0: literal, $v0: expr), $($args: tt),+) => {{
		$fbo.clear((0, 1));
		$fbo.bind();
		let s = $shd.Bind();
		let _ = Uniform!(s, ($n0, $v0));
		let _ = ComputeShader!($shd, $fbo, $($args),+);
	}};
	($shd: ident, $fbo: expr, ($n0: literal, $s0: ident, $t0: expr), $($args: tt),+) => {{
		$fbo.clear((0, 1));
		$fbo.bind();
		let s = $shd.Bind();
		let b = $t0.Bind(&$s0);
		let _ = Uniform!(s, ($n0, &b));
		let _ = ComputeShader!($shd, $fbo, $($args),+);
	}};
}

impl<T: UniformArgs> UniformArgs for (T, &Sampler) {
	fn pass(self, addr: i32, tex_cache: &mut HashMap<i32, i32>) {
		self.0.pass(addr, tex_cache);
	}
}
impl<S, F> UniformArgs for (&Tex<S, F, GL_TEXTURE_2D>, &Sampler) {
	fn pass(self, addr: i32, tex_cache: &mut HashMap<i32, i32>) {
		self.0.Bind(self.1).pass(addr, tex_cache);
	}
}
impl<S, F> UniformArgs for (&Fbo<S, F>, &Sampler) {
	fn pass(self, addr: i32, tex_cache: &mut HashMap<i32, i32>) {
		(&self.0.tex, self.1).pass(addr, tex_cache);
	}
}