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float

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stream

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fxhash

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pso

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encoder.rs factory.rs lib.rs shade.rs slice.rs

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gfx_descriptor

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block.rs lib.rs mapping.rs memory.rs stats.rs usage.rs

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context

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framebuffer

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index

buffer.rs mod.rs multidraw.rs

ops

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program

binary_header.rs compute.rs mod.rs program.rs raw.rs reflection.rs shader.rs uniforms_storage.rs

texture

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uniforms

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utils

bitsfield.rs mod.rs range.rs

vertex

buffer.rs format.rs mod.rs transform_feedback.rs

debug.rs fbo.rs field.rs image_format.rs lib.rs macros.rs pixel_buffer.rs sampler_object.rs sync.rs version.rs vertex_array_object.rs

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osmesa

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iter

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inplace_it

guards

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alloc_array.rs fixed_array.rs lib.rs

input

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libc

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libloading

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consts.rs mod.rs

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line_drawing

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linked_hash_map

lock_api

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log

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maybe_uninit

memchr

x86

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fallback.rs iter.rs lib.rs naive.rs

memmap

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miniz_oxide

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inflate

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lib.rs shared.rs

mio

mio_extras

channel.rs lib.rs timer.rs

naga

back

spv

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front

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proc

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arena.rs lib.rs

net2

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impls.rs mod.rs

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nom

bits

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branch

macros.rs mod.rs

bytes

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character

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combinator

macros.rs mod.rs

multi

macros.rs mod.rs

number

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sequence

macros.rs mod.rs

error.rs internal.rs lib.rs methods.rs str.rs traits.rs util.rs whitespace.rs

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num_complex

cast.rs lib.rs pow.rs

num_cpus

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object

once_cell

imp_std.rs lib.rs

ordered_float

ordermap

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osmesa_sys

owned_ttf_parser

convert.rs lib.rs owned.rs

parking_lot

condvar.rs deadlock.rs elision.rs lib.rs mutex.rs once.rs raw_mutex.rs raw_rwlock.rs remutex.rs rwlock.rs util.rs

parking_lot_core

thread_parker

linux.rs mod.rs

lib.rs parking_lot.rs spinwait.rs util.rs word_lock.rs

percent_encoding

petgraph

pin_project

pin_project_internal

pin_project

attribute.rs derive.rs mod.rs

lib.rs pinned_drop.rs project.rs utils.rs

pin_project_lite

pin_utils

lib.rs projection.rs stack_pin.rs

ppv_lite86

x86_64

lib.rs soft.rs types.rs

proc_macro2

detection.rs fallback.rs lib.rs marker.rs parse.rs wrapper.rs

proc_macro_hack

error.rs iter.rs lib.rs parse.rs quote.rs

proc_macro_nested

quote

ext.rs format.rs ident_fragment.rs lib.rs runtime.rs spanned.rs to_tokens.rs

rand

rand_chacha

chacha.rs guts.rs lib.rs

rand_core

block.rs error.rs impls.rs le.rs lib.rs os.rs

raw_window_handle

read_color

relevant

rendy

rendy_chain

chain

schedule

family.rs mod.rs queue.rs submission.rs

collect.rs lib.rs node.rs resource.rs sync.rs

rendy_command

buffer

encoder.rs level.rs mod.rs reset.rs state.rs submit.rs usage.rs

family

mod.rs queue.rs submission.rs

capability.rs fence.rs lib.rs pool.rs

rendy_core

types

mod.rs vertex.rs

backend.rs casts.rs features.rs lib.rs slow.rs wrap.rs

rendy_descriptor

allocator.rs lib.rs ranges.rs

rendy_factory

barriers.rs blitter.rs config.rs factory.rs lib.rs upload.rs

rendy_frame

cirque

command.rs mod.rs

frame.rs lib.rs

rendy_graph

graph

node

render

group

mod.rs simple.rs

mod.rs present.rs

rendy_init

rendy_memory

allocator

dedicated.rs dynamic.rs linear.rs mod.rs

heaps

heap.rs memory_type.rs mod.rs

mapping

mod.rs range.rs write.rs

block.rs lib.rs memory.rs usage.rs util.rs utilization.rs

rendy_mesh

format.rs lib.rs mesh.rs

rendy_resource

sampler

cache.rs mod.rs

buffer.rs escape.rs image.rs lib.rs resources.rs set.rs

rendy_shader

rendy_texture

format.rs lib.rs pixel.rs texture.rs

rendy_wsi

rustc_demangle

legacy.rs lib.rs v0.rs

rustc_hash

rusttype

ryu

buffer

pretty

exponent.rs mantissa.rs mod.rs

common.rs d2s.rs d2s_full_table.rs d2s_intrinsics.rs digit_table.rs f2s.rs f2s_intrinsics.rs lib.rs

same_file

scoped_tls

scopeguard

serde

de

from_primitive.rs ignored_any.rs impls.rs mod.rs utf8.rs value.rs

private

de.rs macros.rs mod.rs ser.rs

ser

fmt.rs impls.rs impossible.rs mod.rs

export.rs integer128.rs lib.rs macros.rs

serde_derive

internals

ast.rs attr.rs case.rs check.rs ctxt.rs mod.rs symbol.rs

bound.rs de.rs dummy.rs fragment.rs lib.rs pretend.rs ser.rs try.rs

serde_json

features_check

io

value

de.rs from.rs index.rs mod.rs partial_eq.rs ser.rs

de.rs error.rs iter.rs lib.rs macros.rs map.rs number.rs read.rs ser.rs

shaderc

shaderc_sys

shared_library

dynamic_library.rs lib.rs

slab

smallvec

smithay_client_toolkit

data_device

data_device.rs data_offer.rs data_source.rs mod.rs

keyboard

ffi.rs keysyms.rs mod.rs

pointer

mod.rs theme.rs

shell

mod.rs wl.rs xdg.rs zxdg.rs

utils

mempool.rs mod.rs

window

basic_frame.rs concept_frame.rs mod.rs

env.rs lib.rs output.rs surface.rs

smithay_clipboard

lib.rs threaded.rs

spirv_headers

autogen_spirv.rs lib.rs

stb_truetype

syn

takeable_option

texture

thiserror

aserror.rs display.rs lib.rs

thiserror_impl

ast.rs attr.rs expand.rs fmt.rs lib.rs prop.rs valid.rs

thread_profiler

time

display.rs duration.rs lib.rs parse.rs sys.rs

tracing

dispatcher.rs field.rs instrument.rs level_filters.rs lib.rs macros.rs span.rs stdlib.rs subscriber.rs

tracing_core

callsite.rs dispatcher.rs event.rs field.rs lib.rs metadata.rs parent.rs span.rs stdlib.rs subscriber.rs

ttf_parser

typed_arena

unicode_xid

lib.rs tables.rs

vecmath

lib.rs traits.rs

viewport

vk_sys

void

vulkano

buffer

cpu_access.rs cpu_pool.rs device_local.rs immutable.rs mod.rs slice.rs sys.rs traits.rs usage.rs view.rs

command_buffer

descriptor

descriptor_set

collection.rs fixed_size_pool.rs mod.rs persistent.rs std_pool.rs sys.rs unsafe_layout.rs

pipeline_layout

empty.rs limits_check.rs mod.rs runtime_desc.rs sys.rs traits.rs tweaks.rs union.rs

descriptor.rs mod.rs

device

extensions.rs mod.rs

framebuffer

attachments_list.rs compat_atch.rs desc.rs empty.rs framebuffer.rs macros.rs mod.rs sys.rs traits.rs

image

attachment.rs immutable.rs layout.rs mod.rs storage.rs swapchain.rs sys.rs traits.rs usage.rs

instance

debug.rs extensions.rs instance.rs layers.rs limits.rs loader.rs mod.rs

memory

pool

host_visible.rs mod.rs non_host_visible.rs pool.rs

device_memory.rs mod.rs

pipeline

query

swapchain

capabilities.rs display.rs mod.rs present_region.rs surface.rs swapchain.rs

sync

future

fence_signal.rs join.rs mod.rs now.rs semaphore_signal.rs

event.rs fence.rs mod.rs pipeline.rs semaphore.rs

extensions.rs features.rs format.rs lib.rs sampler.rs version.rs

vulkano_shaders

codegen.rs descriptor_sets.rs entry_point.rs enums.rs lib.rs parse.rs spec_consts.rs spirv_search.rs structs.rs

walkdir

dent.rs error.rs lib.rs util.rs

wayland_client

native_lib

display.rs event_queue.rs mod.rs proxy.rs

cursor.rs display.rs event_queue.rs globals.rs lib.rs proxy.rs sinks.rs

wayland_commons

debug.rs filter.rs lib.rs map.rs socket.rs user_data.rs wire.rs

wayland_cursor

wayland_egl

wayland_protocols

lib.rs misc.rs protocol_macro.rs stable.rs unstable.rs wlr.rs

wayland_sys

client.rs common.rs egl.rs lib.rs server.rs

wgpu

backend

direct.rs mod.rs native_gpu_future.rs

util

lib.rs macros.rs

wgpu_core

wgpu_types

winit

platform

desktop.rs mod.rs unix.rs

platform_impl

linux

wayland

event_loop

mod.rs proxy.rs sink.rs state.rs

seat

keyboard

handlers.rs keymap.rs mod.rs

pointer

data.rs handlers.rs mod.rs

text_input

handlers.rs mod.rs

touch

handlers.rs mod.rs

window

env.rs mod.rs output.rs

x11

dpi.rs error.rs event.rs event_loop.rs icon.rs lib.rs monitor.rs window.rs

x11

dpms.rs glx.rs internal.rs keysym.rs lib.rs link.rs xcursor.rs xf86vmode.rs xfixes.rs xft.rs xinerama.rs xinput.rs xinput2.rs xlib.rs xlib_xcb.rs xmd.rs xmu.rs xrandr.rs xrecord.rs xrender.rs xss.rs xt.rs xtest.rs

x11_clipboard

error.rs lib.rs run.rs

x11_dl

dpms.rs error.rs glx.rs internal.rs keysym.rs lib.rs link.rs xcursor.rs xf86vmode.rs xfixes.rs xft.rs xinerama.rs xinput.rs xinput2.rs xlib.rs xlib_xcb.rs xmd.rs xmu.rs xrandr.rs xrecord.rs xrender.rs xss.rs xt.rs xtest.rs

xcb

ffi

xcursor

lib.rs parser.rs

xdg

xml

use std::cmp::min;

use line_drawing::Bresenham;
use line_drawing::XiaolinWu;

use Canvas;
use Drawable;

/// A drawable object that represents a line
pub struct Line {
    /// The first point of the line
    pub pt1: (usize, usize),
    /// The second point of the line
    pub pt2: (usize, usize),
    /// The color of the line
    pub color: [u8; 4],
    /// Decides whether the line will be antialiased
    pub antialiased: bool,
}

impl Line {
    /// Creates a new Line object
    pub fn new(
        pt1: (usize, usize),
        pt2: (usize, usize),
        color: [u8; 4],
        antialiased: bool,
    ) -> Line {
        Line {
            pt1,
            pt2,
            color,
            antialiased,
        }
    }
}

impl Drawable for Line {
    fn draw(&self, canvas: &mut Canvas) {
        if !self.antialiased {
            if self.pt1.0 == self.pt2.0 && self.pt1.0 < canvas.width {
                let (min_y, max_y) = if self.pt1.1 > self.pt2.1 {
                    (self.pt2.1, self.pt1.1)
                } else {
                    (self.pt1.1, self.pt2.1)
                };
                for y in min_y..min(max_y, canvas.height - 1) + 1 {
                    canvas.draw_point(self.pt1.0, y, self.color)
                }
            } else if self.pt1.1 == self.pt2.1 && self.pt1.1 < canvas.height {
                let (min_x, max_x) = if self.pt1.0 > self.pt2.0 {
                    (self.pt2.0, self.pt1.0)
                } else {
                    (self.pt1.0, self.pt2.0)
                };
                for x in min_x..min(max_x, canvas.width - 1) + 1 {
                    canvas.draw_point(x, self.pt1.1, self.color)
                }
            } else {
                // Angled line without antialias
                for (x, y) in Bresenham::new(
                    (self.pt1.0 as isize, self.pt1.1 as isize),
                    (self.pt2.0 as isize, self.pt2.1 as isize),
                ) {
                    if x < canvas.width as isize && y < canvas.height as isize {
                        canvas.draw_point(x as usize, y as usize, self.color)
                    }
                }
            }
        } else {
            // Angled line with antialias
            for ((x, y), coverage) in XiaolinWu::<f32, isize>::new(
                (self.pt1.0 as f32, self.pt1.1 as f32),
                (self.pt2.0 as f32, self.pt2.1 as f32),
            ) {
                if x < canvas.width as isize && y < canvas.height as isize {
                    let mut color = self.color;
                    color[3] = (f32::from(color[3]) * coverage) as u8;
                    canvas.draw_point(x as usize, y as usize, color)
                }
            }
        }
    }
}