mirror of
https://github.com/italicsjenga/agb.git
synced 2024-12-23 08:11:33 +11:00
caching layout
This commit is contained in:
Corwin
parent
f947d82049
commit
cf400029f5
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@ -4,7 +4,7 @@
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use agb::{
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display::{
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object::{
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font::{BufferedRender, TextAlignment},
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font::{BufferedRender, LayoutCache, TextAlignment},
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PaletteVram, Size,
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},
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palette16::Palette16,
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@ -53,27 +53,25 @@ fn main(mut gba: agb::Gba) -> ! {
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timer.set_divider(agb::timer::Divider::Divider256);
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let mut num_letters = 0;
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let mut frame = 0;
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let mut alignment = TextAlignment::Left;
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let mut text = Vec::new();
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let mut cache = LayoutCache::new();
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loop {
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vblank.wait_for_vblank();
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input.update();
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let oam = &mut unmanaged.iter();
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for (letter, slot) in text.iter().zip(oam) {
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slot.set(letter);
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}
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cache.commit(oam);
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let start = timer.value();
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wr.process();
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text = wr.layout(
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Rect::new((WIDTH / 8, 0).into(), (80, 100).into()),
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cache.update(
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&mut wr,
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Rect::new((WIDTH / 3, 0).into(), (WIDTH / 3, 100).into()),
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alignment,
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num_letters,
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2,
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num_letters,
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);
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let end = timer.value();
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@ -89,11 +87,7 @@ fn main(mut gba: agb::Gba) -> ! {
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alignment = TextAlignment::Center;
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}
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frame += 1;
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// if frame % 2 == 0 {
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num_letters += 1;
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// }
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if input.is_just_pressed(Button::A) {
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break;
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@ -69,6 +69,10 @@ impl Font {
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pub(crate) fn ascent(&self) -> i32 {
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self.ascent
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}
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pub(crate) fn line_height(&self) -> i32 {
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self.line_height
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}
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}
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impl Font {
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@ -10,7 +10,7 @@ use self::{
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renderer::{Configuration, WordRender},
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};
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use super::{DynamicSprite, ObjectUnmanaged, PaletteVram, Size, SpriteVram};
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use super::{DynamicSprite, OamIterator, ObjectUnmanaged, PaletteVram, Size, SpriteVram};
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mod preprocess;
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mod renderer;
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@ -48,11 +48,15 @@ pub struct BufferedRender<'font> {
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font: &'font Font,
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}
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#[derive(Debug)]
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struct Word {
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index: usize,
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length: usize,
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}
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#[derive(Debug, Default)]
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struct Letters {
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letters: Vec<LetterGroup>,
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word_lengths: Vec<u8>,
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current_word_length: usize,
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number_of_groups: usize,
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}
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@ -119,7 +123,8 @@ impl<'font> BufferedRender<'font> {
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impl BufferedRender<'_> {
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fn input_character(&mut self, character: char) {
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self.preprocessor.add_character(self.font, character);
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self.preprocessor
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.add_character(self.font, character, self.char_render.sprite_width());
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self.buffered_chars.push_back(character);
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}
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@ -129,102 +134,164 @@ impl BufferedRender<'_> {
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' ' | '\n' => {
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if let Some(group) = self.char_render.finalise_letter() {
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self.letters.letters.push(group);
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self.letters.current_word_length += 1;
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self.letters.number_of_groups += 1;
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}
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if self.letters.current_word_length != 0 {
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self.letters.word_lengths.push(
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self.letters
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.current_word_length
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.try_into()
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.expect("word is too big"),
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);
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}
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self.letters.current_word_length = 0;
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self.letters.number_of_groups += 1;
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}
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letter => {
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if let Some(group) = self.char_render.render_char(self.font, letter) {
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self.letters.letters.push(group);
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self.letters.current_word_length += 1;
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self.letters.number_of_groups += 1;
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}
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}
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}
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}
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}
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#[must_use]
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pub fn layout(
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&mut self,
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area: Rect<i32>,
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alignment: TextAlignment,
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number_of_groups: usize,
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paragraph_spacing: i32,
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) -> Vec<ObjectUnmanaged> {
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let mut objects = Vec::new();
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pub struct LayoutCache {
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objects: Vec<ObjectUnmanaged>,
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state: LayoutCacheState,
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settings: LayoutSettings,
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}
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while !self.buffered_chars.is_empty() && self.letters.number_of_groups <= number_of_groups {
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self.process();
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impl LayoutCache {
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fn update_cache(&mut self, number_of_groups: usize, render: &BufferedRender) {
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let minimum_space_width = render.font.letter(' ').advance_width as i32;
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let lines = render
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.preprocessor
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.lines_element(self.settings.area.size.x, minimum_space_width);
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'outer: for (line, line_elements) in lines.skip(self.state.line_depth) {
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let settings = self.settings.alignment.settings(
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&line,
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minimum_space_width,
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self.settings.area.size,
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);
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if self.state.line_element_depth == 0 {
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self.state.head_position.x += settings.start_x;
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}
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let minimum_space_width = self.font.letter(' ').advance_width as i32;
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let lines = self.preprocessor.lines(area.size.x, minimum_space_width);
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let mut head_position = area.position;
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let mut processed_depth = 0;
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let mut group_depth = 0;
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let mut word_depth = 0;
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let mut rendered_groups = 0;
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'outer: for line in lines {
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let settings = alignment.settings(&line, minimum_space_width, area.size);
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head_position.x += settings.start_x;
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for idx in 0..line.number_of_text_elements() {
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let element = self.preprocessor.get(processed_depth + idx);
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for element in line_elements.iter().skip(self.state.line_element_depth) {
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match element {
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PreprocessedElement::Word(_) => {
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for _ in 0..self
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.letters
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.word_lengths
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.get(word_depth)
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.copied()
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.unwrap_or(u8::MAX)
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PreprocessedElement::Word(word) => {
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for letter in (word.sprite_index()
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..(word.sprite_index() + word.number_of_sprites()))
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.skip(self.state.word_depth)
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.map(|x| &render.letters.letters[x])
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{
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let letter_group = &self.letters.letters[group_depth];
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let mut object = ObjectUnmanaged::new(letter_group.sprite.clone());
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head_position.x += letter_group.left as i32;
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object.set_position(head_position);
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head_position.x += letter_group.width as i32;
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let mut object = ObjectUnmanaged::new(letter.sprite.clone());
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self.state.head_position.x += letter.left as i32;
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object.set_position(self.state.head_position);
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self.state.head_position.x += letter.width as i32;
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object.show();
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objects.push(object);
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group_depth += 1;
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rendered_groups += 1;
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if rendered_groups >= number_of_groups {
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self.objects.push(object);
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self.state.rendered_groups += 1;
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self.state.word_depth += 1;
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if self.state.rendered_groups >= number_of_groups {
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break 'outer;
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}
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}
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word_depth += 1;
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self.state.word_depth = 0;
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self.state.line_element_depth += 1;
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}
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PreprocessedElement::WhiteSpace(space_type) => {
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if space_type == WhiteSpace::NewLine {
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head_position.y += paragraph_spacing;
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if *space_type == WhiteSpace::NewLine {
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self.state.head_position.y += self.settings.paragraph_spacing;
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}
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head_position.x += settings.space_width;
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rendered_groups += 1;
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if rendered_groups >= number_of_groups {
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self.state.head_position.x += settings.space_width;
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self.state.rendered_groups += 1;
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self.state.line_element_depth += 1;
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if self.state.rendered_groups >= number_of_groups {
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break 'outer;
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}
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}
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}
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}
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processed_depth += line.number_of_text_elements();
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head_position.x = area.position.x;
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head_position.y += 9;
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self.state.head_position.y += render.font.line_height();
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self.state.head_position.x = self.settings.area.position.x;
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self.state.line_element_depth = 0;
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self.state.line_depth += 1;
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}
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}
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objects
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pub fn update(
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&mut self,
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r: &mut BufferedRender<'_>,
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area: Rect<i32>,
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alignment: TextAlignment,
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paragraph_spacing: i32,
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number_of_groups: usize,
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) {
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while !r.buffered_chars.is_empty() && r.letters.number_of_groups <= number_of_groups {
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r.process();
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}
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let settings = LayoutSettings {
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area,
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alignment,
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paragraph_spacing,
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};
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if settings != self.settings {
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self.reset(settings);
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}
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self.update_cache(number_of_groups, r);
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}
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pub fn commit(&self, oam: &mut OamIterator) {
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for (object, slot) in self.objects.iter().zip(oam) {
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slot.set(object);
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}
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}
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#[must_use]
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pub fn new() -> Self {
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Self {
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objects: Vec::new(),
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state: Default::default(),
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settings: LayoutSettings {
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area: Rect::new((0, 0).into(), (0, 0).into()),
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alignment: TextAlignment::Right,
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paragraph_spacing: -100,
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},
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}
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}
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fn reset(&mut self, settings: LayoutSettings) {
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self.objects.clear();
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self.state = LayoutCacheState {
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head_position: settings.area.position,
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processed_depth: 0,
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group_depth: 0,
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word_depth: 0,
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rendered_groups: 0,
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line_depth: 0,
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line_element_depth: 0,
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};
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self.settings = settings;
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}
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}
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#[derive(PartialEq, Eq)]
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struct LayoutSettings {
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area: Rect<i32>,
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alignment: TextAlignment,
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paragraph_spacing: i32,
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}
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#[derive(Default)]
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struct LayoutCacheState {
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head_position: Vector2D<i32>,
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processed_depth: usize,
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group_depth: usize,
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word_depth: usize,
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rendered_groups: usize,
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line_depth: usize,
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line_element_depth: usize,
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}
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|
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@ -1,3 +1,5 @@
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use core::num::NonZeroU8;
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use alloc::vec::Vec;
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use crate::display::Font;
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@ -6,50 +8,53 @@ use super::WhiteSpace;
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#[derive(Debug, PartialEq, Eq)]
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pub(crate) enum PreprocessedElement {
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Word(u8),
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Word(Word),
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WhiteSpace(WhiteSpace),
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}
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#[test_case]
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fn check_size_of_preprocessed_element_is_correct(_: &mut crate::Gba) {
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assert_eq!(
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core::mem::size_of::<PreprocessedElement>(),
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core::mem::size_of::<Word>()
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);
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}
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#[derive(Debug, PartialEq, Eq, Clone, Copy)]
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#[repr(align(4))]
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pub(crate) struct Word {
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pixels: u8,
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number_of_sprites: NonZeroU8,
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index: u16,
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}
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impl Word {
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pub fn pixels(self) -> i32 {
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self.pixels.into()
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}
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pub fn number_of_sprites(self) -> usize {
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self.number_of_sprites.get().into()
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}
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pub fn sprite_index(self) -> usize {
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self.index.into()
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}
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}
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#[derive(Clone, Copy, PartialEq, Eq)]
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struct PreprocessedElementStored(u8);
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impl core::fmt::Debug for PreprocessedElementStored {
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fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
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f.debug_tuple("PreprocessedElementStored")
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.field(&self.parse())
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.finish()
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}
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}
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impl PreprocessedElementStored {
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fn parse(self) -> PreprocessedElement {
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match self.0 {
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255 => PreprocessedElement::WhiteSpace(WhiteSpace::NewLine),
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254 => PreprocessedElement::WhiteSpace(WhiteSpace::Space),
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length => PreprocessedElement::Word(length),
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}
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}
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fn from_element(x: PreprocessedElement) -> Self {
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match x {
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PreprocessedElement::Word(length) => PreprocessedElementStored(length),
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PreprocessedElement::WhiteSpace(space) => PreprocessedElementStored(match space {
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WhiteSpace::NewLine => 255,
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WhiteSpace::Space => 254,
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}),
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}
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}
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}
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pub(crate) struct PreprocessedElementStored(u8);
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#[derive(Default, Debug)]
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pub(crate) struct Preprocessed {
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widths: Vec<PreprocessedElementStored>,
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widths: Vec<PreprocessedElement>,
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preprocessor: Preprocessor,
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}
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|
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#[derive(Debug, Default)]
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struct Preprocessor {
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current_word_width: i32,
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number_of_sprites: usize,
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width_in_sprite: i32,
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total_number_of_sprites: usize,
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}
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|
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impl Preprocessor {
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|
|
@ -57,27 +62,44 @@ impl Preprocessor {
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&mut self,
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font: &Font,
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character: char,
|
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widths: &mut Vec<PreprocessedElementStored>,
|
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sprite_width: i32,
|
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widths: &mut Vec<PreprocessedElement>,
|
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) {
|
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match character {
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space @ (' ' | '\n') => {
|
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if self.current_word_width != 0 {
|
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widths.push(PreprocessedElementStored::from_element(
|
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PreprocessedElement::Word(
|
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self.current_word_width
|
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self.number_of_sprites += 1;
|
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self.total_number_of_sprites += 1;
|
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widths.push(PreprocessedElement::Word(Word {
|
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pixels: self.current_word_width.try_into().expect("word too wide"),
|
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number_of_sprites: NonZeroU8::new(
|
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self.number_of_sprites.try_into().expect("word too wide"),
|
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)
|
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.unwrap(),
|
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index: (self.total_number_of_sprites - self.number_of_sprites)
|
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.try_into()
|
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.expect("word should be small and positive"),
|
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),
|
||||
));
|
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.expect("out of range"),
|
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}));
|
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self.current_word_width = 0;
|
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self.number_of_sprites = 0;
|
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self.width_in_sprite = 0;
|
||||
}
|
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widths.push(PreprocessedElementStored::from_element(
|
||||
PreprocessedElement::WhiteSpace(WhiteSpace::from_char(space)),
|
||||
));
|
||||
widths.push(PreprocessedElement::WhiteSpace(WhiteSpace::from_char(
|
||||
space,
|
||||
)));
|
||||
}
|
||||
letter => {
|
||||
let letter = font.letter(letter);
|
||||
self.current_word_width += letter.advance_width as i32 + letter.xmin as i32;
|
||||
if self.width_in_sprite + letter.width as i32 > sprite_width {
|
||||
self.number_of_sprites += 1;
|
||||
self.total_number_of_sprites += 1;
|
||||
self.width_in_sprite = 0;
|
||||
}
|
||||
if self.width_in_sprite != 0 {
|
||||
self.width_in_sprite += letter.xmin as i32;
|
||||
}
|
||||
self.width_in_sprite += letter.advance_width as i32;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -86,7 +108,7 @@ impl Preprocessor {
|
|||
pub(crate) struct Lines<'preprocess> {
|
||||
minimum_space_width: i32,
|
||||
layout_width: i32,
|
||||
data: &'preprocess [PreprocessedElementStored],
|
||||
data: &'preprocess [PreprocessedElement],
|
||||
current_start_idx: usize,
|
||||
}
|
||||
|
||||
|
|
@ -131,11 +153,11 @@ impl<'pre> Iterator for Lines<'pre> {
|
|||
let mut number_of_words = 0;
|
||||
|
||||
while let Some(next) = self.data.get(self.current_start_idx + line_idx_length) {
|
||||
match next.parse() {
|
||||
PreprocessedElement::Word(pixels) => {
|
||||
match next {
|
||||
PreprocessedElement::Word(word) => {
|
||||
let additional_space_width =
|
||||
additional_space_count as i32 * self.minimum_space_width;
|
||||
let width = pixels as i32;
|
||||
let width = word.pixels();
|
||||
if width + current_line_width + additional_space_width > self.layout_width {
|
||||
break;
|
||||
}
|
||||
|
|
@ -173,12 +195,9 @@ impl Preprocessed {
|
|||
Default::default()
|
||||
}
|
||||
|
||||
pub(crate) fn get(&self, idx: usize) -> PreprocessedElement {
|
||||
self.widths[idx].parse()
|
||||
}
|
||||
|
||||
pub(crate) fn add_character(&mut self, font: &Font, c: char) {
|
||||
self.preprocessor.add_character(font, c, &mut self.widths);
|
||||
pub(crate) fn add_character(&mut self, font: &Font, c: char, sprite_width: i32) {
|
||||
self.preprocessor
|
||||
.add_character(font, c, sprite_width, &mut self.widths);
|
||||
}
|
||||
|
||||
pub(crate) fn lines(&self, layout_width: i32, minimum_space_width: i32) -> Lines<'_> {
|
||||
|
|
@ -190,17 +209,17 @@ impl Preprocessed {
|
|||
}
|
||||
}
|
||||
|
||||
fn lines_element(
|
||||
pub(crate) fn lines_element(
|
||||
&self,
|
||||
layout_width: i32,
|
||||
minimum_space_width: i32,
|
||||
) -> impl Iterator<Item = &[PreprocessedElementStored]> {
|
||||
) -> impl Iterator<Item = (Line, &[PreprocessedElement])> {
|
||||
let mut idx = 0;
|
||||
self.lines(layout_width, minimum_space_width).map(move |x| {
|
||||
let length = x.number_of_text_elements;
|
||||
let d = &self.widths[idx..(idx + length)];
|
||||
idx += length;
|
||||
d
|
||||
(x, d)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -50,6 +50,10 @@ pub(crate) struct WordRender {
|
|||
}
|
||||
|
||||
impl WordRender {
|
||||
pub(crate) fn sprite_width(&self) -> i32 {
|
||||
self.config.sprite_size.to_width_height().0 as i32
|
||||
}
|
||||
|
||||
#[must_use]
|
||||
pub(crate) fn new(config: Configuration) -> Self {
|
||||
WordRender {
|
||||
|
|
|
|||
Loading…
Reference in a new issue