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|
use crate::texture::Texture;
use crate::MaybeCurrentContextWithFns;
#[derive(Debug, Clone)]
pub struct Framebuffer
{
inner: crate::sys::types::GLuint,
}
impl Framebuffer
{
#[must_use]
pub fn new(current_context: &MaybeCurrentContextWithFns) -> Self
{
let mut inner = 0;
unsafe {
current_context.fns().GenFramebuffers(1, &raw mut inner);
}
Self { inner }
}
/// Attaches a texture object as a logical buffer of this framebuffer object.
pub fn attach_texture(
&self,
current_context: &MaybeCurrentContextWithFns,
attachment: Attachment,
texture: Texture,
texture_mipmap_level: u16,
)
{
unsafe {
current_context.fns().NamedFramebufferTexture(
self.inner,
attachment.into_gl(),
texture.into_raw(),
texture_mipmap_level.into(),
);
}
}
/// Specifies which color buffer is to be drawn into when colors are written to this
/// framebuffer object.
///
/// If `buffer` is `None`, no color buffer will be written into.
pub fn set_draw_buffer(
&self,
current_context: &MaybeCurrentContextWithFns,
buffer: Option<ColorAttachment>,
)
{
unsafe {
current_context.fns().NamedFramebufferDrawBuffer(
self.inner,
buffer
.map(ColorAttachment::into_gl)
.unwrap_or(crate::sys::NONE),
);
}
}
pub fn delete(self, current_context: &MaybeCurrentContextWithFns)
{
unsafe {
current_context
.fns()
.DeleteFramebuffers(1, &raw const self.inner);
}
}
pub fn from_raw(raw: u32) -> Self
{
Self { inner: raw }
}
pub fn into_raw(self) -> u32
{
self.inner
}
}
/// Binds a framebuffer to a framebuffer target.
///
/// If `framebuffer` is `None`, breaks the existing binding of a framebuffer object to
/// the framebuffer target `target`.
pub fn bind(
current_context: &MaybeCurrentContextWithFns,
target: Target,
framebuffer: Option<&Framebuffer>,
)
{
unsafe {
current_context.fns().BindFramebuffer(
target.into_gl(),
framebuffer
.map(|framebuffer| framebuffer.inner)
.unwrap_or(0),
);
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum Target
{
Draw,
Read,
DrawAndRead,
}
impl Target
{
fn into_gl(self) -> crate::sys::types::GLenum
{
match self {
Self::Draw => crate::sys::DRAW_FRAMEBUFFER,
Self::Read => crate::sys::READ_FRAMEBUFFER,
Self::DrawAndRead => crate::sys::FRAMEBUFFER,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[non_exhaustive]
pub enum Attachment
{
Color(ColorAttachment),
Depth,
Stencil,
DepthStencil,
}
impl Attachment
{
fn into_gl(self) -> crate::sys::types::GLenum
{
match self {
Self::Color(color_attachment) => color_attachment.into_gl(),
Self::Depth => crate::sys::DEPTH_ATTACHMENT,
Self::Stencil => crate::sys::STENCIL_ATTACHMENT,
Self::DepthStencil => crate::sys::DEPTH_STENCIL_ATTACHMENT,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct ColorAttachment(pub u8);
impl ColorAttachment
{
fn into_gl(self) -> crate::sys::types::GLenum
{
match self.0 {
0 => crate::sys::COLOR_ATTACHMENT0,
1 => crate::sys::COLOR_ATTACHMENT1,
10 => crate::sys::COLOR_ATTACHMENT10,
11 => crate::sys::COLOR_ATTACHMENT11,
12 => crate::sys::COLOR_ATTACHMENT12,
13 => crate::sys::COLOR_ATTACHMENT13,
14 => crate::sys::COLOR_ATTACHMENT14,
15 => crate::sys::COLOR_ATTACHMENT15,
16 => crate::sys::COLOR_ATTACHMENT16,
17 => crate::sys::COLOR_ATTACHMENT17,
18 => crate::sys::COLOR_ATTACHMENT18,
19 => crate::sys::COLOR_ATTACHMENT19,
2 => crate::sys::COLOR_ATTACHMENT2,
20 => crate::sys::COLOR_ATTACHMENT20,
21 => crate::sys::COLOR_ATTACHMENT21,
22 => crate::sys::COLOR_ATTACHMENT22,
23 => crate::sys::COLOR_ATTACHMENT23,
24 => crate::sys::COLOR_ATTACHMENT24,
25 => crate::sys::COLOR_ATTACHMENT25,
26 => crate::sys::COLOR_ATTACHMENT26,
27 => crate::sys::COLOR_ATTACHMENT27,
28 => crate::sys::COLOR_ATTACHMENT28,
29 => crate::sys::COLOR_ATTACHMENT29,
3 => crate::sys::COLOR_ATTACHMENT3,
30 => crate::sys::COLOR_ATTACHMENT30,
31 => crate::sys::COLOR_ATTACHMENT31,
4 => crate::sys::COLOR_ATTACHMENT4,
5 => crate::sys::COLOR_ATTACHMENT5,
6 => crate::sys::COLOR_ATTACHMENT6,
7 => crate::sys::COLOR_ATTACHMENT7,
8 => crate::sys::COLOR_ATTACHMENT8,
9 => crate::sys::COLOR_ATTACHMENT9,
_ => panic!("Invalid color attachment index. Must be < 32"),
}
}
}
|
