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Switch to i16s for tile indices

This commit is contained in:
Patrick Walton 2018-12-21 12:00:29 -08:00
parent 5442f81fea
commit 8887b55469
1 changed files with 37 additions and 31 deletions
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68
utils/tile-svg/src/main.rs
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@ -983,6 +983,12 @@ impl<'o, 'p> Tiler<'o, 'p> {
let tiles_across = ((strip_right_extent - strip_origin.x) / TILE_WIDTH) as usize;
let view_box_origin_y = match self.view_box {
Some(view_box) => view_box.origin.y,
None => 0.0,
};
let mut tile_index_y = (f32::floor(view_box_origin_y / TILE_HEIGHT) * TILE_HEIGHT) as i16;
let mut strip_fills = vec![];
let mut strip_tiles = Vec::with_capacity(tiles_across);
let mut used_strip_tiles = FixedBitSet::with_capacity(tiles_across);
@ -998,10 +1004,7 @@ impl<'o, 'p> Tiler<'o, 'p> {
strip_extent.y - strip_origin.y));
// We can skip a bunch of steps if we're above the viewport.
let above_view_box = match self.view_box {
Some(ref view_box) => strip_extent.y <= view_box.origin.y,
None => false,
};
let above_view_box = tile_index_y < 0;
// Reset strip info.
strip_fills.clear();
@ -1009,21 +1012,20 @@ impl<'o, 'p> Tiler<'o, 'p> {
used_strip_tiles.clear();
// Allocate tiles.
let mut tile_left = strip_origin.x;
while tile_left < strip_right_extent {
let strip_origin = Point2D::new(tile_left, strip_origin.y);
strip_tiles.push(MaskTilePrimitive::new(&strip_origin, self.fill_color));
tile_left += TILE_WIDTH;
for tile_index_x in 0..tiles_across {
strip_tiles.push(MaskTilePrimitive::new(tile_index_x as i16,
tile_index_y,
self.fill_color));
}
// Process old active edges.
let (mut strip_tile_index, mut current_left) = (0, strip_bounds.origin.x);
let (mut tile_index_x, mut current_left) = (0, strip_bounds.origin.x);
let mut winding = 0;
mem::swap(&mut old_active_edges, &mut self.active_edges.array);
for mut active_edge in old_active_edges.drain(..) {
// Move over to the correct tile, filling in as we go.
let mut tile_left = strip_bounds.origin.x + (strip_tile_index as f32) * TILE_WIDTH;
while strip_tile_index < strip_tiles.len() {
let mut tile_left = strip_bounds.origin.x + (tile_index_x as f32) * TILE_WIDTH;
while tile_index_x < strip_tiles.len() {
let tile_right = tile_left + TILE_WIDTH;
let segment_left = active_edge.segment.min_x();
@ -1031,24 +1033,24 @@ impl<'o, 'p> Tiler<'o, 'p> {
break
}
strip_tiles[strip_tile_index].backdrop = winding as f32;
strip_tiles[tile_index_x].backdrop = winding as f32;
current_left = tile_right;
tile_left = tile_right;
strip_tile_index += 1;
tile_index_x += 1;
}
// Do subtile fill.
let min_x = active_edge.segment.min_x();
let edge_winding = active_edge.segment.winding();
if current_left < min_x && strip_tile_index < strip_tiles.len() {
if current_left < min_x && tile_index_x < strip_tiles.len() {
let left = Point2D::new(current_left - tile_left, 0.0);
let right = Point2D::new(current_left - min_x, 0.0);
strip_fills.push(FillPrimitive {
from: if edge_winding < 0 { left } else { right },
to: if edge_winding < 0 { right } else { left },
tile_index: strip_tile_index as u32,
tile_index: tile_index_x as u32,
});
used_strip_tiles.insert(strip_tile_index);
used_strip_tiles.insert(tile_index_x);
current_left = right.x;
}
@ -1140,13 +1142,13 @@ impl<'o, 'p> Tiler<'o, 'p> {
if !above_view_box {
// Flush tiles.
let first_tile_index = self.built_scene.mask_tiles.len() as u32;
for (tile_index, tile) in strip_tiles.iter().enumerate() {
if used_strip_tiles.contains(tile_index) {
for (tile_index_x, tile) in strip_tiles.iter().enumerate() {
if used_strip_tiles.contains(tile_index_x) {
self.built_scene.mask_tiles.push(*tile);
} else if tile.backdrop != 0.0 {
self.built_scene
.solid_tiles
.push(SolidTilePrimitive::new(&tile.position, tile.color));
let primitive =
SolidTilePrimitive::new(tile_index_x as i16, tile_index_y, tile.color);
self.built_scene.solid_tiles.push(primitive);
}
}
@ -1164,8 +1166,8 @@ impl<'o, 'p> Tiler<'o, 'p> {
}
}
// Sort point queue.
strip_origin.y = strip_extent.y;
tile_index_y += 1;
}
}
@ -1277,13 +1279,15 @@ struct FillPrimitive {
#[derive(Clone, Copy, Debug)]
struct SolidTilePrimitive {
position: Point2D<f32>,
tile_x: i16,
tile_y: i16,
color: ColorU,
}
#[derive(Clone, Copy, Debug)]
struct MaskTilePrimitive {
position: Point2D<f32>,
tile_x: i16,
tile_y: i16,
color: ColorU,
backdrop: f32,
}
@ -1326,7 +1330,8 @@ impl BuiltScene {
writer.write_u32::<LittleEndian>(solid_tiles_size as u32)?;
for &tile_primitive in &self.solid_tiles {
let color = tile_primitive.color;
write_point(writer, &tile_primitive.position)?;
writer.write_i16::<LittleEndian>(tile_primitive.tile_x)?;
writer.write_i16::<LittleEndian>(tile_primitive.tile_y)?;
writer.write_all(&[color.r, color.g, color.b, color.a]).unwrap();
}
@ -1334,7 +1339,8 @@ impl BuiltScene {
writer.write_u32::<LittleEndian>(mask_tiles_size as u32)?;
for &tile_primitive in &self.mask_tiles {
let color = tile_primitive.color;
write_point(writer, &tile_primitive.position)?;
writer.write_i16::<LittleEndian>(tile_primitive.tile_x)?;
writer.write_i16::<LittleEndian>(tile_primitive.tile_y)?;
writer.write_f32::<LittleEndian>(tile_primitive.backdrop)?;
writer.write_all(&[color.r, color.g, color.b, color.a]).unwrap();
}
@ -1350,14 +1356,14 @@ impl BuiltScene {
}
impl SolidTilePrimitive {
fn new(position: &Point2D<f32>, color: ColorU) -> SolidTilePrimitive {
SolidTilePrimitive { position: *position, color }
fn new(tile_x: i16, tile_y: i16, color: ColorU) -> SolidTilePrimitive {
SolidTilePrimitive { tile_x, tile_y, color }
}
}
impl MaskTilePrimitive {
fn new(position: &Point2D<f32>, color: ColorU) -> MaskTilePrimitive {
MaskTilePrimitive { position: *position, backdrop: 0.0, color }
fn new(tile_x: i16, tile_y: i16, color: ColorU) -> MaskTilePrimitive {
MaskTilePrimitive { tile_x, tile_y, backdrop: 0.0, color }
}
}