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
|
// Sampler cache - deduplicates samplers across effects
#pragma once
#include <map>
// Forward declarations (users must include gpu.h)
struct WGPUDeviceImpl;
typedef struct WGPUDeviceImpl* WGPUDevice;
struct WGPUSamplerImpl;
typedef struct WGPUSamplerImpl* WGPUSampler;
#include "platform/platform.h"
struct SamplerSpec {
WGPUAddressMode u, v;
WGPUFilterMode mag, min;
uint16_t anisotropy;
bool operator<(const SamplerSpec& o) const {
if (u != o.u) return u < o.u;
if (v != o.v) return v < o.v;
if (mag != o.mag) return mag < o.mag;
if (min != o.min) return min < o.min;
return anisotropy < o.anisotropy;
}
};
class SamplerCache {
std::map<SamplerSpec, WGPUSampler> cache_;
SamplerCache() = default;
public:
static SamplerCache& Get() {
static SamplerCache instance;
return instance;
}
WGPUSampler get_or_create(WGPUDevice device, const SamplerSpec& spec) {
auto it = cache_.find(spec);
if (it != cache_.end()) return it->second;
WGPUSamplerDescriptor desc{};
desc.addressModeU = spec.u;
desc.addressModeV = spec.v;
desc.magFilter = spec.mag;
desc.minFilter = spec.min;
desc.maxAnisotropy = spec.anisotropy;
WGPUSampler sampler = wgpuDeviceCreateSampler(device, &desc);
cache_[spec] = sampler;
return sampler;
}
// Common presets
static SamplerSpec linear() {
return {WGPUAddressMode_Repeat, WGPUAddressMode_Repeat,
WGPUFilterMode_Linear, WGPUFilterMode_Linear, 1};
}
static SamplerSpec clamp() {
return {WGPUAddressMode_ClampToEdge, WGPUAddressMode_ClampToEdge,
WGPUFilterMode_Linear, WGPUFilterMode_Linear, 1};
}
};
|
