tea/
target.rs

1extern crate gl;
2
3use crate::{GlBind, GlObject, GlTarget, GlEnum};
4use crate::texture::GlTexture;
5
6#[derive(Debug, PartialEq, Eq, Copy, Clone)]
7pub enum FramebufferAttachment {
8    ColorAttachment(u32),
9    DepthAttachment,
10    StencilAttachment
11}
12
13impl Default for FramebufferAttachment {
14    fn default() -> Self {
15        FramebufferAttachment::ColorAttachment(0)
16    }
17}
18
19impl GlEnum for FramebufferAttachment {
20    fn to_enum(&self) -> u32 {
21        match self {
22            Self::ColorAttachment(c) => { return gl::COLOR_ATTACHMENT0 + c; },
23            Self::DepthAttachment => { return gl::DEPTH_ATTACHMENT },
24            Self::StencilAttachment => { return gl::STENCIL_ATTACHMENT }
25        }
26    }
27}
28
29#[derive(Default, Debug, Eq, PartialEq)]
30pub struct Framebuffer(u32);
31
32/******************************
33 * Framebuffer
34 ******************************/
35impl Framebuffer {
36    pub fn new() -> Result<Self, String> {
37        let mut handle: u32 = 0;
38        unsafe {
39            gl::GenFramebuffers(1, &mut handle);
40        }
41        Ok(Framebuffer(handle))
42    }
43
44    pub fn attach_texture<T: GlTexture>(&self, attachment: FramebufferAttachment, texture: &T) {
45        unsafe {
46            gl::FramebufferTexture2D(
47                Self::target(),
48                attachment.to_enum(), 
49                T::target(), texture.get_id(), 0
50            );
51        }
52    }
53
54    pub fn bind_read(&self) {
55        unsafe { gl::BindFramebuffer(gl::READ_FRAMEBUFFER, self.0) };
56    }
57
58    pub fn bind_draw(&self) {
59        unsafe { gl::BindFramebuffer(gl::DRAW_FRAMEBUFFER, self.0) };
60    }
61}
62
63impl GlTarget for Framebuffer {
64    fn target() -> u32 { gl::FRAMEBUFFER }
65    fn binding() -> u32 { gl::FRAMEBUFFER_BINDING }
66}
67
68impl GlObject for Framebuffer {
69    fn get_id(&self) -> u32 {
70        self.0
71    }
72}
73
74impl GlBind for Framebuffer {
75    fn bind(&self) {
76        unsafe { gl::BindFramebuffer(Self::target(), self.0) };
77    }
78
79    fn unbind(&self) {
80        unsafe { gl::BindFramebuffer(Self::target(), 0) };
81    }
82}
83
84impl Drop for Framebuffer {
85    fn drop(&mut self) {
86        unsafe { gl::DeleteFramebuffers(1, &self.0) };
87    }
88}
tea/target.rs

tea/
target.rs
