// Sampler cache implementation
// See sampler_cache.h
#include "gpu/sampler_cache.h"

#include "platform/platform.h"
#include "util/fatal_error.h"

WGPUSampler SamplerCache::get_or_create(WGPUDevice device,
                                        const SamplerSpec& spec) {
  HEADLESS_RETURN_VAL_IF_NULL(device, nullptr);

  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;
}

void SamplerCache::clear() {
  for (auto& pair : cache_) {
    wgpuSamplerRelease(pair.second);
  }
  cache_.clear();
}