2019-01-14 17:20:36 -05:00
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// pathfinder/renderer/src/gpu_data.rs
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//
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// Copyright © 2019 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Packed data ready to be sent to the GPU.
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use crate::builder::SceneBuilder;
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use crate::scene::ObjectShader;
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use crate::tile_map::DenseTileMap;
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use crate::tiles::{self, TILE_HEIGHT, TILE_WIDTH};
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use pathfinder_geometry::basic::line_segment::{LineSegmentF32, LineSegmentU4, LineSegmentU8};
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use pathfinder_geometry::basic::point::{Point2DF32, Point2DI32, Point3DF32};
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use pathfinder_geometry::basic::rect::{RectF32, RectI32};
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use pathfinder_geometry::util;
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use pathfinder_simd::default::{F32x4, I32x4};
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use std::fmt::{Debug, Formatter, Result as DebugResult};
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use std::ops::Add;
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use std::sync::atomic::Ordering;
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#[derive(Debug)]
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pub(crate) struct BuiltObject {
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pub bounds: RectF32,
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pub fills: Vec<FillBatchPrimitive>,
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pub alpha_tiles: Vec<AlphaTileBatchPrimitive>,
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pub tiles: DenseTileMap<TileObjectPrimitive>,
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}
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#[derive(Debug)]
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pub struct BuiltScene {
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pub view_box: RectF32,
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pub quad: [Point3DF32; 4],
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pub object_count: u32,
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pub shaders: Vec<ObjectShader>,
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}
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pub enum RenderCommand {
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AddFills(Vec<FillBatchPrimitive>),
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FlushFills,
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AlphaTile(Vec<AlphaTileBatchPrimitive>),
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SolidTile(Vec<SolidTileBatchPrimitive>),
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}
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#[derive(Clone, Copy, Debug)]
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pub struct FillObjectPrimitive {
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pub px: LineSegmentU4,
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pub subpx: LineSegmentU8,
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pub tile_x: i16,
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pub tile_y: i16,
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}
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#[derive(Clone, Copy, Debug)]
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#[repr(C)]
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pub struct TileObjectPrimitive {
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/// If `u16::MAX`, then this is a solid tile.
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pub alpha_tile_index: u16,
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pub backdrop: i8,
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}
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// FIXME(pcwalton): Move `subpx` before `px` and remove `repr(packed)`.
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#[derive(Clone, Copy, Debug, Default)]
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#[repr(packed)]
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pub struct FillBatchPrimitive {
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pub px: LineSegmentU4,
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pub subpx: LineSegmentU8,
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pub alpha_tile_index: u16,
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}
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#[derive(Clone, Copy, Debug)]
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#[repr(C)]
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pub struct SolidTileBatchPrimitive {
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pub tile_x: i16,
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pub tile_y: i16,
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pub object_index: u16,
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}
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#[derive(Clone, Copy, Debug, Default)]
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#[repr(C)]
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pub struct AlphaTileBatchPrimitive {
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pub tile_x_lo: u8,
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pub tile_y_lo: u8,
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pub tile_hi: u8,
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pub backdrop: i8,
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pub object_index: u16,
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pub tile_index: u16,
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}
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#[derive(Clone, Copy, Debug, Default)]
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pub struct Stats {
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pub object_count: u32,
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pub solid_tile_count: u32,
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pub alpha_tile_count: u32,
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pub fill_count: u32,
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}
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// Utilities for built objects
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impl BuiltObject {
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pub(crate) fn new(bounds: RectF32) -> BuiltObject {
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let tile_rect = tiles::round_rect_out_to_tile_bounds(bounds);
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let tiles = DenseTileMap::new(tile_rect);
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BuiltObject { bounds, fills: vec![], alpha_tiles: vec![], tiles }
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}
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#[inline]
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pub(crate) fn tile_rect(&self) -> RectI32 {
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self.tiles.rect
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}
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fn add_fill(&mut self,
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builder: &SceneBuilder,
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segment: &LineSegmentF32,
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tile_coords: Point2DI32) {
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//println!("add_fill({:?} ({}, {}))", segment, tile_x, tile_y);
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// Ensure this fill is in bounds. If not, cull it.
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if self.tile_coords_to_local_index(tile_coords).is_none() {
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return;
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};
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debug_assert_eq!(TILE_WIDTH, TILE_HEIGHT);
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let tile_size = F32x4::splat(TILE_WIDTH as f32);
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let (min, max) = (F32x4::default(), F32x4::splat((TILE_WIDTH * 256 - 1) as f32));
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let shuffle_mask = I32x4::new(0x0c08_0400, 0x0d05_0901, 0, 0).as_u8x16();
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let tile_upper_left = tile_coords.to_f32().0.xyxy() * tile_size;
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//F32x4::new(tile_x as f32, tile_y as f32, tile_x as f32, tile_y as f32) * tile_size;
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let segment = (segment.0 - tile_upper_left) * F32x4::splat(256.0);
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let segment =
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segment.clamp(min, max).to_i32x4().as_u8x16().shuffle(shuffle_mask).as_i32x4();
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// Unpack whole and fractional pixels.
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let px = LineSegmentU4((segment[1] | (segment[1] >> 12)) as u16);
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let subpx = LineSegmentU8(segment[0] as u32);
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// Cull degenerate fills.
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if (px.0 & 0xf) as u8 == ((px.0 >> 8) & 0xf) as u8 &&
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(subpx.0 & 0xff) as u8 == ((subpx.0 >> 16) & 0xff) as u8 {
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//println!("... ... culling!");
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return;
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}
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// Allocate global tile if necessary.
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let alpha_tile_index = self.get_or_allocate_alpha_tile_index(builder, tile_coords);
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//println!("... ... OK, pushing");
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self.fills.push(FillBatchPrimitive { px, subpx, alpha_tile_index });
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}
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fn get_or_allocate_alpha_tile_index(&mut self, builder: &SceneBuilder, tile_coords: Point2DI32)
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-> u16 {
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let local_tile_index = self.tiles.coords_to_index_unchecked(tile_coords);
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let alpha_tile_index = self.tiles.data[local_tile_index].alpha_tile_index;
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if alpha_tile_index != !0 {
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return alpha_tile_index;
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}
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let alpha_tile_index = builder.next_alpha_tile_index
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.fetch_add(1, Ordering::Relaxed) as u16;
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self.tiles.data[local_tile_index].alpha_tile_index = alpha_tile_index;
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alpha_tile_index
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}
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pub(crate) fn add_active_fill(&mut self,
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builder: &SceneBuilder,
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left: f32,
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right: f32,
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mut winding: i32,
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tile_coords: Point2DI32) {
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let tile_origin_y = (tile_coords.y() * TILE_HEIGHT as i32) as f32;
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let left = Point2DF32::new(left, tile_origin_y);
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let right = Point2DF32::new(right, tile_origin_y);
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let segment = if winding < 0 {
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LineSegmentF32::new(&left, &right)
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} else {
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LineSegmentF32::new(&right, &left)
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};
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/*println!("... emitting active fill {} -> {} winding {} @ tile {},{}",
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left.x(),
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right.x(),
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winding,
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tile_x,
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tile_y);*/
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while winding != 0 {
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self.add_fill(builder, &segment, tile_coords);
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if winding < 0 {
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winding += 1
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} else {
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winding -= 1
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}
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}
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}
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pub(crate) fn generate_fill_primitives_for_line(&mut self,
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builder: &SceneBuilder,
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mut segment: LineSegmentF32,
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tile_y: i32) {
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/*println!("... generate_fill_primitives_for_line(): segment={:?} tile_y={} ({}-{})",
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segment,
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tile_y,
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tile_y as f32 * TILE_HEIGHT as f32,
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(tile_y + 1) as f32 * TILE_HEIGHT as f32);*/
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let winding = segment.from_x() > segment.to_x();
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let (segment_left, segment_right) = if !winding {
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(segment.from_x(), segment.to_x())
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} else {
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(segment.to_x(), segment.from_x())
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};
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// FIXME(pcwalton): Optimize this.
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let segment_tile_left = f32::floor(segment_left) as i32 / TILE_WIDTH as i32;
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let segment_tile_right =
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util::alignup_i32(f32::ceil(segment_right) as i32, TILE_WIDTH as i32);
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/*println!("segment_tile_left={} segment_tile_right={} tile_rect={:?}",
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segment_tile_left, segment_tile_right, self.tile_rect);*/
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for subsegment_tile_x in segment_tile_left..segment_tile_right {
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let (mut fill_from, mut fill_to) = (segment.from(), segment.to());
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let subsegment_tile_right =
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((i32::from(subsegment_tile_x) + 1) * TILE_HEIGHT as i32) as f32;
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if subsegment_tile_right < segment_right {
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let x = subsegment_tile_right;
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let point = Point2DF32::new(x, segment.solve_y_for_x(x));
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if !winding {
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fill_to = point;
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segment = LineSegmentF32::new(&point, &segment.to());
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} else {
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fill_from = point;
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segment = LineSegmentF32::new(&segment.from(), &point);
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}
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}
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let fill_segment = LineSegmentF32::new(&fill_from, &fill_to);
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let fill_tile_coords = Point2DI32::new(subsegment_tile_x, tile_y);
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self.add_fill(builder, &fill_segment, fill_tile_coords);
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}
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}
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#[inline]
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pub(crate) fn tile_coords_to_local_index(&self, coords: Point2DI32) -> Option<u32> {
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self.tiles.coords_to_index(coords).map(|index| index as u32)
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}
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#[inline]
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pub(crate) fn local_tile_index_to_coords(&self, tile_index: u32) -> Point2DI32 {
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self.tiles.index_to_coords(tile_index as usize)
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}
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}
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impl BuiltScene {
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#[inline]
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pub fn new(view_box: RectF32, quad: &[Point3DF32; 4], object_count: u32) -> BuiltScene {
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BuiltScene { view_box, quad: *quad, object_count, shaders: vec![] }
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}
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pub fn stats(&self) -> Stats {
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Stats {
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object_count: self.object_count,
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solid_tile_count: 0,
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alpha_tile_count: 0,
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fill_count: 0,
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}
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}
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}
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2019-04-15 16:21:24 -04:00
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impl Default for TileObjectPrimitive {
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#[inline]
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fn default() -> TileObjectPrimitive {
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TileObjectPrimitive { backdrop: 0, alpha_tile_index: !0 }
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}
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}
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impl TileObjectPrimitive {
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#[inline]
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pub fn is_solid(&self) -> bool {
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self.alpha_tile_index == !0
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}
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}
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impl AlphaTileBatchPrimitive {
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#[inline]
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pub fn new(tile_coords: Point2DI32, backdrop: i8, object_index: u16, tile_index: u16)
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-> AlphaTileBatchPrimitive {
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AlphaTileBatchPrimitive {
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tile_x_lo: (tile_coords.x() & 0xff) as u8,
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tile_y_lo: (tile_coords.y() & 0xff) as u8,
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tile_hi: (((tile_coords.x() >> 8) & 0x0f) | ((tile_coords.y() >> 4) & 0xf0)) as u8,
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backdrop,
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object_index,
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tile_index,
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}
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}
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#[inline]
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pub fn tile_coords(&self) -> Point2DI32 {
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Point2DI32::new((self.tile_x_lo as i32) | (((self.tile_hi & 0xf) as i32) << 8),
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(self.tile_y_lo as i32) | (((self.tile_hi & 0xf0) as i32) << 4))
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}
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}
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2019-03-29 22:11:38 -04:00
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impl Debug for RenderCommand {
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fn fmt(&self, formatter: &mut Formatter) -> DebugResult {
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match *self {
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2019-04-15 16:21:24 -04:00
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RenderCommand::AddFills(ref fills) => write!(formatter, "AddFills(x{})", fills.len()),
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RenderCommand::FlushFills => write!(formatter, "FlushFills"),
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2019-03-29 22:11:38 -04:00
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RenderCommand::AlphaTile(ref tiles) => {
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write!(formatter, "AlphaTile(x{})", tiles.len())
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}
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RenderCommand::SolidTile(ref tiles) => {
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write!(formatter, "SolidTile(x{})", tiles.len())
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}
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2019-01-14 17:20:36 -05:00
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}
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}
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}
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2019-03-13 19:32:39 -04:00
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impl Add<Stats> for Stats {
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type Output = Stats;
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fn add(self, other: Stats) -> Stats {
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|
Stats {
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object_count: other.object_count,
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solid_tile_count: other.solid_tile_count,
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2019-03-22 17:28:18 -04:00
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alpha_tile_count: other.alpha_tile_count,
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2019-03-13 19:32:39 -04:00
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fill_count: other.fill_count,
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}
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}
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}
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