MetalDevice: Anisotropy should be minimum 1

src/util/d3d11_texture.cpp

@@ -197,7 +197,7 @@ std::unique_ptr<GPUSampler> D3D11Device::CreateSampler(const GPUSampler::Config&
   desc.MinLOD = static_cast<float>(config.min_lod);
   desc.MaxLOD = static_cast<float>(config.max_lod);
 
-  if (config.anisotropy > 0)
+  if (config.anisotropy > 1)
   {
     desc.Filter = D3D11_FILTER_ANISOTROPIC;
     desc.MaxAnisotropy = config.anisotropy;

src/util/d3d12_texture.cpp

@@ -806,7 +806,7 @@ D3D12DescriptorHandle D3D12Device::GetSampler(const GPUSampler::Config& config)
   desc.MinLOD = static_cast<float>(config.min_lod);
   desc.MaxLOD = static_cast<float>(config.max_lod);
 
-  if (config.anisotropy > 0)
+  if (config.anisotropy > 1)
   {
     desc.Filter = D3D12_FILTER_ANISOTROPIC;
     desc.MaxAnisotropy = config.anisotropy;

src/util/metal_device.mm

@@ -1264,7 +1264,7 @@ std::unique_ptr<GPUSampler> MetalDevice::CreateSampler(const GPUSampler::Config&
                                                           MTLSamplerMipFilterNotMipmapped;
     desc.lodMinClamp = static_cast<float>(config.min_lod);
     desc.lodMaxClamp = static_cast<float>(config.max_lod);
-    desc.maxAnisotropy = config.anisotropy;
+    desc.maxAnisotropy = std::max<u8>(config.anisotropy, 1);
 
     if (config.address_u == GPUSampler::AddressMode::ClampToBorder ||
         config.address_v == GPUSampler::AddressMode::ClampToBorder ||

src/util/opengl_texture.cpp

@@ -376,10 +376,8 @@ std::unique_ptr<GPUSampler> OpenGLDevice::CreateSampler(const GPUSampler::Config
   glSamplerParameterf(sampler, GL_TEXTURE_MIN_LOD, static_cast<float>(config.min_lod));
   glSamplerParameterf(sampler, GL_TEXTURE_MAX_LOD, static_cast<float>(config.max_lod));
   glSamplerParameterfv(sampler, GL_TEXTURE_BORDER_COLOR, config.GetBorderFloatColor().data());
-  if (config.anisotropy)
-  {
-    // TODO
-  }
+  if (config.anisotropy > 1)
+    glSamplerParameterf(sampler, GL_TEXTURE_MAX_ANISOTROPY, static_cast<float>(config.anisotropy.GetValue()));
 
   return std::unique_ptr<GPUSampler>(new OpenGLSampler(sampler));
 }