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// We need to implement RenderElement manually due to AsGlesFrame requirement.
// This macro does it for us.
#[macro_export]
macro_rules! niri_render_elements {
// The two callable variants: with <R> and without <R>. They include From impls because nested
// repetitions ($type and $variant with + and $R with ?) don't work properly.
($name:ident<R> => { $($variant:ident = $type:ty),+ $(,)? }) => {
$crate::niri_render_elements!(@impl $name () ($name<R>) => { $($variant = $type),+ });
$(impl<R: $crate::render_helpers::renderer::NiriRenderer> From<$type> for $name<R> {
fn from(x: $type) -> Self {
Self::$variant(x)
}
})+
};
($name:ident => { $($variant:ident = $type:ty),+ $(,)? }) => {
$crate::niri_render_elements!(@impl $name ($name) () => { $($variant = $type),+ });
$(impl From<$type> for $name {
fn from(x: $type) -> Self {
Self::$variant(x)
}
})+
};
// The internal variant that generates most of the code. $name_no_R and $name_R are necessary
// for the impl RenderElement<SomeRenderer> for $name<SomeRenderer>: since $R does not appear
// in this line, we cannot condition based on $R like elsewhere, so we condition on duplicate
// names instead. Like this: $($name_R<SomeRenderer>)? $($name_no_R)? so only one is chosen.
(@impl $name:ident ($($name_no_R:ident)?) ($($name_R:ident<$R:ident>)?) => { $($variant:ident = $type:ty),+ }) => {
#[allow(clippy::large_enum_variant)]
#[derive(Debug)]
pub enum $name$(<$R: $crate::render_helpers::renderer::NiriRenderer>)? {
$($variant($type)),+
}
impl$(<$R: $crate::render_helpers::renderer::NiriRenderer>)? smithay::backend::renderer::element::Element for $name$(<$R>)? {
fn id(&self) -> &smithay::backend::renderer::element::Id {
match self {
$($name::$variant(elem) => elem.id()),+
}
}
fn current_commit(&self) -> smithay::backend::renderer::utils::CommitCounter {
match self {
$($name::$variant(elem) => elem.current_commit()),+
}
}
fn geometry(&self, scale: smithay::utils::Scale<f64>) -> smithay::utils::Rectangle<i32, smithay::utils::Physical> {
match self {
$($name::$variant(elem) => elem.geometry(scale)),+
}
}
fn transform(&self) -> smithay::utils::Transform {
match self {
$($name::$variant(elem) => elem.transform()),+
}
}
fn src(&self) -> smithay::utils::Rectangle<f64, smithay::utils::Buffer> {
match self {
$($name::$variant(elem) => elem.src()),+
}
}
fn damage_since(
&self,
scale: smithay::utils::Scale<f64>,
commit: Option<smithay::backend::renderer::utils::CommitCounter>,
) -> smithay::backend::renderer::utils::DamageSet<i32, smithay::utils::Physical> {
match self {
$($name::$variant(elem) => elem.damage_since(scale, commit)),+
}
}
fn opaque_regions(&self, scale: smithay::utils::Scale<f64>) -> smithay::backend::renderer::utils::OpaqueRegions<i32, smithay::utils::Physical> {
match self {
$($name::$variant(elem) => elem.opaque_regions(scale)),+
}
}
fn alpha(&self) -> f32 {
match self {
$($name::$variant(elem) => elem.alpha()),+
}
}
fn kind(&self) -> smithay::backend::renderer::element::Kind {
match self {
$($name::$variant(elem) => elem.kind()),+
}
}
}
impl smithay::backend::renderer::element::RenderElement<smithay::backend::renderer::gles::GlesRenderer>
for $($name_R<smithay::backend::renderer::gles::GlesRenderer>)? $($name_no_R)?
{
fn draw(
&self,
frame: &mut smithay::backend::renderer::gles::GlesFrame<'_, '_>,
src: smithay::utils::Rectangle<f64, smithay::utils::Buffer>,
dst: smithay::utils::Rectangle<i32, smithay::utils::Physical>,
damage: &[smithay::utils::Rectangle<i32, smithay::utils::Physical>],
opaque_regions: &[smithay::utils::Rectangle<i32, smithay::utils::Physical>],
) -> Result<(), smithay::backend::renderer::gles::GlesError> {
match self {
$($name::$variant(elem) => {
smithay::backend::renderer::element::RenderElement::<smithay::backend::renderer::gles::GlesRenderer>::draw(elem, frame, src, dst, damage, opaque_regions)
})+
}
}
fn underlying_storage(&self, renderer: &mut smithay::backend::renderer::gles::GlesRenderer) -> Option<smithay::backend::renderer::element::UnderlyingStorage<'_>> {
match self {
$($name::$variant(elem) => elem.underlying_storage(renderer)),+
}
}
}
impl<'render> smithay::backend::renderer::element::RenderElement<$crate::backend::tty::TtyRenderer<'render>>
for $($name_R<$crate::backend::tty::TtyRenderer<'render>>)? $($name_no_R)?
{
fn draw(
&self,
frame: &mut $crate::backend::tty::TtyFrame<'render, '_, '_>,
src: smithay::utils::Rectangle<f64, smithay::utils::Buffer>,
dst: smithay::utils::Rectangle<i32, smithay::utils::Physical>,
damage: &[smithay::utils::Rectangle<i32, smithay::utils::Physical>],
opaque_regions: &[smithay::utils::Rectangle<i32, smithay::utils::Physical>],
) -> Result<(), $crate::backend::tty::TtyRendererError<'render>> {
match self {
$($name::$variant(elem) => {
smithay::backend::renderer::element::RenderElement::<$crate::backend::tty::TtyRenderer<'render>>::draw(elem, frame, src, dst, damage, opaque_regions)
})+
}
}
fn underlying_storage(
&self,
renderer: &mut $crate::backend::tty::TtyRenderer<'render>,
) -> Option<smithay::backend::renderer::element::UnderlyingStorage<'_>> {
match self {
$($name::$variant(elem) => elem.underlying_storage(renderer)),+
}
}
}
};
}
|
