1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

//! This module contains some methods to get informations and statistics
//! about the patterns of a grid.

use std::sync::Arc;

use super::vulkano::buffer::BufferUsage;
use super::vulkano::buffer::CpuAccessibleBuffer;
use super::vulkano::command_buffer::AutoCommandBufferBuilder;
use super::vulkano::command_buffer::CommandBuffer;
use super::vulkano::descriptor::descriptor_set::PersistentDescriptorSet;
use super::vulkano::format::Format;
use super::vulkano::image::Dimensions;
use super::vulkano::image::StorageImage;
use super::vulkano::pipeline::ComputePipeline;
use super::vulkano::sync::GpuFuture;

use super::vulkan::fms;
use Grid;

impl Grid {
    /// Returns the coordinates of the cell at the upper left corner of
    /// the current `Grid`.
    pub fn guess_pattern_origin(&self) -> (usize, usize) {
        let width = self.width;
        let height = self.height;

        if width == 0 || height == 0 {
            return (0, 0);
        }

        let mut orig_x = width;
        let mut orig_y = height;

        for y in 0..height {
            for x in 0..width {
                if self.get_cell_state(x as i64, y as i64) == 255 {
                    if x < orig_x {
                        orig_x = x;
                    }
                    if y < orig_y {
                        orig_y = y;
                    }
                }
            }
        }

        (orig_x, orig_y)
    }

    /// Returns the size of the current `Grid`'s pattern.
    pub fn guess_pattern_size(&self) -> (usize, usize) {
        let width = self.width;
        let height = self.height;

        if width == 0 || height == 0 {
            return (0, 0);
        }

        let (orig_x, orig_y) = self.guess_pattern_origin();
        let (mut lim_x, mut lim_y) = (orig_x, orig_y);

        for y in 0..height {
            for x in 0..width {
                if self.get_cell_state(x as i64, y as i64) == 255 {
                    if x > lim_x {
                        lim_x = x;
                    }
                    if y > lim_y {
                        lim_y = y;
                    }
                }
            }
        }

        (lim_x - orig_x + 1, lim_y - orig_y + 1)
    }

    pub fn compute_pattern_boundaries(
        &self,
    ) -> (Option<usize>, Option<usize>, Option<usize>, Option<usize>) {
        let cells_img = StorageImage::new(
            self.device.clone(),
            Dimensions::Dim2d {
                width: self.width as u32,
                height: self.height as u32,
            },
            Format::R8Unorm,
            Some(self.queue.family()),
        )
        .expect("failed to create image");

        let flat_map_x = CpuAccessibleBuffer::from_iter(
            self.device.clone(),
            BufferUsage::all(),
            (0..self.width).map(|_| 0),
        )
        .expect("failed to create buffer");

        let flat_map_y = CpuAccessibleBuffer::from_iter(
            self.device.clone(),
            BufferUsage::all(),
            (0..self.height).map(|_| 0),
        )
        .expect("failed to create buffer");

        let shader =
            fms::Shader::load(self.device.clone()).expect("failed to create shader module");
        let compute_pipeline = Arc::new(
            ComputePipeline::new(self.device.clone(), &shader.main_entry_point(), &())
                .expect("failed to create compute pipeline"),
        );

        let set = Arc::new(
            PersistentDescriptorSet::start(compute_pipeline.clone(), 0)
                .add_image(cells_img.clone())
                .unwrap()
                .add_buffer(flat_map_x.clone())
                .unwrap()
                .add_buffer(flat_map_y.clone())
                .unwrap()
                .build()
                .unwrap(),
        );

        let command_buffer =
            AutoCommandBufferBuilder::new(self.device.clone(), self.queue.family())
                .unwrap()
                .copy_buffer_to_image(self.cells.clone(), cells_img.clone())
                .unwrap()
                .dispatch(
                    [
                        (self.width as f64 / 8.0).ceil() as u32,
                        (self.height as f64 / 8.0).ceil() as u32,
                        1,
                    ],
                    compute_pipeline.clone(),
                    set.clone(),
                    (),
                )
                .unwrap()
                .build()
                .unwrap();

        let finished = command_buffer.execute(self.queue.clone()).unwrap();
        finished
            .then_signal_fence_and_flush()
            .unwrap()
            .wait(None)
            .unwrap();

        let min_x = flat_map_x.read().unwrap().iter().position(|&n| n > 0);
        let max_x = flat_map_x.read().unwrap().iter().rposition(|&n| n > 0);

        let min_y = flat_map_y.read().unwrap().iter().position(|&n| n > 0);
        let max_y = flat_map_y.read().unwrap().iter().rposition(|&n| n > 0);

        (min_x, max_x, min_y, max_y)
    }
}