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Avoid repeated background index sort

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Former-commit-id: 5c7aab3a416cc1cfd9cbd6033457b111fe409d98
Former-commit-id: 0594872c527f57bfd77d0afd9635eed3b88f9be8
This commit is contained in:
sapir 2020-04-13 01:15:27 +03:00 committed by MishMish
parent 9d08ac13e6
commit 8dee829e26
1 changed files with 20 additions and 21 deletions
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41
core/src/gpu/sfx.rs
View file

@ -38,25 +38,24 @@ impl From<WindowFlags> for BlendFlags {
}
impl Gpu {
/// returns a none sorted array of background indexes that are enabled
fn active_backgrounds_sorted(
/// Returns background indexes in render order. Filters range by bg_start..=bg_end.
fn sorted_backgrounds(&self, bg_start: usize, bg_end: usize) -> ArrayVec<[usize; 4]> {
let mut backgrounds: ArrayVec<[usize; 4]> = (bg_start..=bg_end).collect();
backgrounds.sort_by_key(|bg| (self.backgrounds[*bg].bgcnt.priority(), *bg));
backgrounds
}
/// Filters a background indexes array by whether they're active
fn active_backgrounds(
&self,
bg_start: usize,
bg_end: usize,
backgrounds: &[usize],
window_flags: WindowFlags,
) -> ArrayVec<[usize; 4]> {
let mut backgrounds = ArrayVec::<[usize; 4]>::new();
for bg in bg_start..=bg_end {
if self.dispcnt.enable_bg(bg) && window_flags.bg_enabled(bg) {
unsafe {
backgrounds.push_unchecked(bg);
}
}
}
backgrounds.sort_by_key(|bg| (self.backgrounds[*bg].bgcnt.priority(), *bg));
backgrounds
.iter()
.copied()
.filter(|bg| self.dispcnt.enable_bg(*bg) && window_flags.bg_enabled(*bg))
.collect()
}
#[allow(unused)]
@ -74,6 +73,7 @@ impl Gpu {
/// Composes the render layers into a final scanline while applying needed special effects, and render it to the frame buffer
pub fn finalize_scanline(&mut self, bg_start: usize, bg_end: usize) {
let backdrop_color = Rgb15(self.palette_ram.read_16(0));
let sorted_backgrounds = self.sorted_backgrounds(bg_start, bg_end);
let y = self.vcount;
let output = unsafe {
@ -82,7 +82,7 @@ impl Gpu {
};
if !self.dispcnt.is_using_windows() {
let win = WindowInfo::new(WindowType::WinNone, WindowFlags::all());
let backgrounds = self.active_backgrounds_sorted(bg_start, bg_end, win.flags);
let backgrounds = self.active_backgrounds(&sorted_backgrounds, win.flags);
for x in 0..DISPLAY_WIDTH {
let pixel = self.compose_pixel(x, y, &win, &backgrounds, backdrop_color);
output[x] = pixel.to_rgb24();
@ -92,7 +92,7 @@ impl Gpu {
let mut occupied_count = 0;
if self.dispcnt.enable_window0() && self.win0.contains_y(y) {
let win = WindowInfo::new(WindowType::Win0, self.win0.flags);
let backgrounds = self.active_backgrounds_sorted(bg_start, bg_end, win.flags);
let backgrounds = self.active_backgrounds(&sorted_backgrounds, win.flags);
for x in self.win0.left()..self.win0.right() {
let pixel = self.compose_pixel(x, y, &win, &backgrounds, backdrop_color);
output[x] = pixel.to_rgb24();
@ -105,7 +105,7 @@ impl Gpu {
}
if self.dispcnt.enable_window1() && self.win1.contains_y(y) {
let win = WindowInfo::new(WindowType::Win1, self.win1.flags);
let backgrounds = self.active_backgrounds_sorted(bg_start, bg_end, win.flags);
let backgrounds = self.active_backgrounds(&sorted_backgrounds, win.flags);
for x in self.win1.left()..self.win1.right() {
if !occupied[x] {
let pixel = self.compose_pixel(x, y, &win, &backgrounds, backdrop_color);
@ -119,12 +119,11 @@ impl Gpu {
return;
}
let win_out = WindowInfo::new(WindowType::WinOut, self.winout_flags);
let win_out_backgrounds =
self.active_backgrounds_sorted(bg_start, bg_end, win_out.flags);
let win_out_backgrounds = self.active_backgrounds(&sorted_backgrounds, win_out.flags);
if self.dispcnt.enable_obj_window() {
let win_obj = WindowInfo::new(WindowType::WinObj, self.winobj_flags);
let win_obj_backgrounds =
self.active_backgrounds_sorted(bg_start, bg_end, win_obj.flags);
self.active_backgrounds(&sorted_backgrounds, win_obj.flags);
for x in 0..DISPLAY_WIDTH {
if occupied[x] {
continue;