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

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

use dom_struct::dom_struct;
use webgpu::wgc::resource::SamplerDescriptor;
use webgpu::{WebGPU, WebGPUDevice, WebGPURequest, WebGPUSampler};

use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::WebGPUBinding::{
    GPUSamplerDescriptor, GPUSamplerMethods,
};
use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
use crate::dom::bindings::root::DomRoot;
use crate::dom::bindings::str::USVString;
use crate::dom::globalscope::GlobalScope;
use crate::dom::gpudevice::GPUDevice;

#[dom_struct]
pub struct GPUSampler {
    reflector_: Reflector,
    #[ignore_malloc_size_of = "defined in webgpu"]
    #[no_trace]
    channel: WebGPU,
    label: DomRefCell<USVString>,
    #[no_trace]
    device: WebGPUDevice,
    compare_enable: bool,
    #[no_trace]
    sampler: WebGPUSampler,
}

impl GPUSampler {
    fn new_inherited(
        channel: WebGPU,
        device: WebGPUDevice,
        compare_enable: bool,
        sampler: WebGPUSampler,
        label: USVString,
    ) -> Self {
        Self {
            reflector_: Reflector::new(),
            channel,
            label: DomRefCell::new(label),
            device,
            sampler,
            compare_enable,
        }
    }

    pub fn new(
        global: &GlobalScope,
        channel: WebGPU,
        device: WebGPUDevice,
        compare_enable: bool,
        sampler: WebGPUSampler,
        label: USVString,
    ) -> DomRoot<Self> {
        reflect_dom_object(
            Box::new(GPUSampler::new_inherited(
                channel,
                device,
                compare_enable,
                sampler,
                label,
            )),
            global,
        )
    }
}

impl GPUSampler {
    pub fn id(&self) -> WebGPUSampler {
        self.sampler
    }

    /// <https://gpuweb.github.io/gpuweb/#dom-gpudevice-createsampler>
    pub fn create(device: &GPUDevice, descriptor: &GPUSamplerDescriptor) -> DomRoot<GPUSampler> {
        let sampler_id = device.global().wgpu_id_hub().create_sampler_id();
        let compare_enable = descriptor.compare.is_some();
        let desc = SamplerDescriptor {
            label: (&descriptor.parent).into(),
            address_modes: [
                descriptor.addressModeU.into(),
                descriptor.addressModeV.into(),
                descriptor.addressModeW.into(),
            ],
            mag_filter: descriptor.magFilter.into(),
            min_filter: descriptor.minFilter.into(),
            mipmap_filter: descriptor.mipmapFilter.into(),
            lod_min_clamp: *descriptor.lodMinClamp,
            lod_max_clamp: *descriptor.lodMaxClamp,
            compare: descriptor.compare.map(Into::into),
            anisotropy_clamp: 1,
            border_color: None,
        };

        device
            .channel()
            .0
            .send(WebGPURequest::CreateSampler {
                device_id: device.id().0,
                sampler_id,
                descriptor: desc,
            })
            .expect("Failed to create WebGPU sampler");

        let sampler = WebGPUSampler(sampler_id);

        GPUSampler::new(
            &device.global(),
            device.channel().clone(),
            device.id(),
            compare_enable,
            sampler,
            descriptor.parent.label.clone(),
        )
    }
}

impl GPUSamplerMethods<crate::DomTypeHolder> for GPUSampler {
    /// <https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label>
    fn Label(&self) -> USVString {
        self.label.borrow().clone()
    }

    /// <https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label>
    fn SetLabel(&self, value: USVString) {
        *self.label.borrow_mut() = value;
    }
}

impl Drop for GPUSampler {
    fn drop(&mut self) {
        if let Err(e) = self
            .channel
            .0
            .send(WebGPURequest::DropSampler(self.sampler.0))
        {
            warn!("Failed to send DropSampler ({:?}) ({})", self.sampler.0, e);
        }
    }
}