From 601d8ff6292d32e16b90bc125904ad2fa75bcb97 Mon Sep 17 00:00:00 2001
From: Stenzek <stenzek@gmail.com>
Date: Mon, 4 Dec 2023 21:22:02 +1000
Subject: [PATCH] MetalDevice: Anisotropy should be minimum 1

---
 src/util/d3d11_texture.cpp  | 2 +-
 src/util/d3d12_texture.cpp  | 2 +-
 src/util/metal_device.mm    | 2 +-
 src/util/opengl_texture.cpp | 6 ++----
 4 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/src/util/d3d11_texture.cpp b/src/util/d3d11_texture.cpp
index f0c6548f9..eca2705bd 100644
--- a/src/util/d3d11_texture.cpp
+++ b/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;
diff --git a/src/util/d3d12_texture.cpp b/src/util/d3d12_texture.cpp
index 33af43a40..48600f7ac 100644
--- a/src/util/d3d12_texture.cpp
+++ b/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;
diff --git a/src/util/metal_device.mm b/src/util/metal_device.mm
index 846072bbe..46e36ec14 100644
--- a/src/util/metal_device.mm
+++ b/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 ||
diff --git a/src/util/opengl_texture.cpp b/src/util/opengl_texture.cpp
index dbbf2285a..ee3ece6e7 100644
--- a/src/util/opengl_texture.cpp
+++ b/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));
 }