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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
use wgpu::RenderPipeline;
use crate::wgpuctx::WgpuCtx;
use crate::texture::Texture;
use crate::vertex::Vertex;
use crate::wgpuctx::pipeline::RenderPipelineBuilder;
struct CanvasTexture
{
pub texture: Texture,
buffer: wgpu::Buffer
}
pub struct Canvas
{
pipeline: wgpu::RenderPipeline,
vertex_buffer: wgpu::Buffer,
texture: CanvasTexture,
position: winit::dpi::LogicalPosition<f32>,
size: winit::dpi::LogicalSize<f32>
}
impl Canvas
{
fn create_canvas_texture(
wgpuctx: &WgpuCtx,
canvas_size: winit::dpi::LogicalSize<f32>,
window_size: winit::dpi::PhysicalSize<u32>)
-> CanvasTexture
{
let canvas_physical_size = winit::dpi::PhysicalSize::<u32>::new(
(window_size.width as f32 * canvas_size.width).floor() as u32,
(window_size.height as f32 * canvas_size.height).floor() as u32
);
CanvasTexture::new(wgpuctx, canvas_physical_size)
}
pub fn new(
wgpuctx: &WgpuCtx,
window_size: winit::dpi::PhysicalSize<u32>,
position: winit::dpi::LogicalPosition<f32>,
size: winit::dpi::LogicalSize<f32>
) -> Result<Self, ()> {
let pos_x = position.x * 2.0 - 1.0;
let pos_y = position.y * 2.0 - 1.0;
let size_x = size.width * 2.0;
let size_y = size.height * 2.0;
let vertices: &[Vertex] = &[
Vertex { position: [ pos_x, pos_y, 0.0 ], uv: [ 0.0, 1.0 ] },
Vertex { position: [ pos_x+size_x, pos_y, 0.0 ], uv: [ 1.0, 1.0 ] },
Vertex { position: [ pos_x+size_x, pos_y+size_y, 0.0 ], uv: [ 1.0, 0.0 ] },
Vertex { position: [ pos_x+size_x, pos_y+size_y, 0.0 ], uv: [ 1.0, 0.0 ] },
Vertex { position: [ pos_x, pos_y+size_y, 0.0 ], uv: [ 0.0, 0.0 ] },
Vertex { position: [ pos_x, pos_y, 0.0 ], uv: [ 0.0, 1.0 ] },
];
let vertex_buffer = wgpuctx.create_buffer_init(
&wgpu::util::BufferInitDescriptor {
label: Some("Vertex Buffer"),
contents: bytemuck::cast_slice(vertices),
usage: wgpu::BufferUsages::VERTEX
}
);
let shader = wgpuctx.create_shader(
wgpu::include_wgsl!(concat!(
env!("CARGO_MANIFEST_DIR"),
"/assets/shaders/canvas.wgsl")
));
let canvas_texture = Canvas::create_canvas_texture(wgpuctx, size, window_size);
let render_pipeline = RenderPipelineBuilder::new(
&shader)
.add_bindgroup(&canvas_texture.texture.bindgrouplayout)
.add_vertex_layout(Vertex::descr())
.build(Some("Canvas render pipleine"), wgpuctx);
Ok(Self {
pipeline: render_pipeline,
vertex_buffer: vertex_buffer,
texture: canvas_texture,
position: position,
size: size
})
}
pub fn resize(
&mut self,
wgpuctx: &WgpuCtx,
width: u32,
height: u32)
{
let window_size = winit::dpi::PhysicalSize::new(width, height);
self.texture = Canvas::create_canvas_texture(wgpuctx, self.size, window_size);
}
pub fn present(
&mut self,
screen_pass: &mut wgpu::RenderPass
)
-> Result<(), wgpu::SurfaceError> {
screen_pass.set_pipeline(&self.pipeline);
self.texture.texture.use_on_pass(screen_pass, 0);
screen_pass.set_vertex_buffer(0, self.vertex_buffer.slice(..));
screen_pass.draw(0..6,0..1);
Ok(())
}
pub fn view(&self)
-> &wgpu::TextureView
{
self.texture.texture.view()
}
} //impl Canvas
impl CanvasTexture
{
pub fn new(
wgpuctx: &WgpuCtx,
size: winit::dpi::PhysicalSize<u32>)
-> Self
{
let u32_size = std::mem::size_of::<u32>() as u32;
let buffer_size = (u32_size * size.width * size.height) as wgpu::BufferAddress;
let buffer_descr = wgpu::BufferDescriptor {
size: buffer_size,
usage: wgpu::BufferUsages::COPY_DST,
label: None,
mapped_at_creation: false
};
let texture = wgpuctx.new_render_texture(size);
let buffer = wgpuctx.create_buffer(&buffer_descr);
Self {
texture: texture,
buffer: buffer
}
}
}
impl WgpuCtx
{
pub fn new_render_texture(
&self,
size: winit::dpi::PhysicalSize<u32>)
-> Texture
{
let descr = wgpu::TextureDescriptor {
size: wgpu::Extent3d {
width: size.width,
height: size.height,
depth_or_array_layers: 1
},
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: wgpu::TextureFormat::Bgra8UnormSrgb,
view_formats: &[
wgpu::TextureFormat::Bgra8UnormSrgb
],
usage: wgpu::TextureUsages::TEXTURE_BINDING |
wgpu::TextureUsages::COPY_SRC |
wgpu::TextureUsages::RENDER_ATTACHMENT,
label: None
};
self.new_texture(descr)
}
}
|
