| // Copyright 2017 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "dawn_native/metal/SamplerMTL.h" |
| |
| #include "dawn_native/metal/DeviceMTL.h" |
| #include "dawn_native/metal/UtilsMetal.h" |
| |
| namespace dawn::native::metal { |
| |
| namespace { |
| MTLSamplerMinMagFilter FilterModeToMinMagFilter(wgpu::FilterMode mode) { |
| switch (mode) { |
| case wgpu::FilterMode::Nearest: |
| return MTLSamplerMinMagFilterNearest; |
| case wgpu::FilterMode::Linear: |
| return MTLSamplerMinMagFilterLinear; |
| } |
| } |
| |
| MTLSamplerMipFilter FilterModeToMipFilter(wgpu::FilterMode mode) { |
| switch (mode) { |
| case wgpu::FilterMode::Nearest: |
| return MTLSamplerMipFilterNearest; |
| case wgpu::FilterMode::Linear: |
| return MTLSamplerMipFilterLinear; |
| } |
| } |
| |
| MTLSamplerAddressMode AddressMode(wgpu::AddressMode mode) { |
| switch (mode) { |
| case wgpu::AddressMode::Repeat: |
| return MTLSamplerAddressModeRepeat; |
| case wgpu::AddressMode::MirrorRepeat: |
| return MTLSamplerAddressModeMirrorRepeat; |
| case wgpu::AddressMode::ClampToEdge: |
| return MTLSamplerAddressModeClampToEdge; |
| } |
| } |
| } |
| |
| // static |
| ResultOrError<Ref<Sampler>> Sampler::Create(Device* device, |
| const SamplerDescriptor* descriptor) { |
| DAWN_INVALID_IF( |
| descriptor->compare != wgpu::CompareFunction::Undefined && |
| device->IsToggleEnabled(Toggle::MetalDisableSamplerCompare), |
| "Sampler compare function (%s) not supported. Compare functions are disabled with the " |
| "Metal backend.", |
| descriptor->compare); |
| |
| Ref<Sampler> sampler = AcquireRef(new Sampler(device, descriptor)); |
| DAWN_TRY(sampler->Initialize(descriptor)); |
| return sampler; |
| } |
| |
| MaybeError Sampler::Initialize(const SamplerDescriptor* descriptor) { |
| NSRef<MTLSamplerDescriptor> mtlDescRef = AcquireNSRef([MTLSamplerDescriptor new]); |
| MTLSamplerDescriptor* mtlDesc = mtlDescRef.Get(); |
| |
| mtlDesc.minFilter = FilterModeToMinMagFilter(descriptor->minFilter); |
| mtlDesc.magFilter = FilterModeToMinMagFilter(descriptor->magFilter); |
| mtlDesc.mipFilter = FilterModeToMipFilter(descriptor->mipmapFilter); |
| |
| mtlDesc.sAddressMode = AddressMode(descriptor->addressModeU); |
| mtlDesc.tAddressMode = AddressMode(descriptor->addressModeV); |
| mtlDesc.rAddressMode = AddressMode(descriptor->addressModeW); |
| |
| mtlDesc.lodMinClamp = descriptor->lodMinClamp; |
| mtlDesc.lodMaxClamp = descriptor->lodMaxClamp; |
| // https://developer.apple.com/documentation/metal/mtlsamplerdescriptor/1516164-maxanisotropy |
| mtlDesc.maxAnisotropy = std::min<uint16_t>(GetMaxAnisotropy(), 16u); |
| |
| if (descriptor->compare != wgpu::CompareFunction::Undefined) { |
| // Sampler compare is unsupported before A9, which we validate in |
| // Sampler::Create. |
| mtlDesc.compareFunction = ToMetalCompareFunction(descriptor->compare); |
| // The value is default-initialized in the else-case, and we don't set it or the |
| // Metal debug device errors. |
| } |
| |
| mMtlSamplerState = AcquireNSPRef( |
| [ToBackend(GetDevice())->GetMTLDevice() newSamplerStateWithDescriptor:mtlDesc]); |
| |
| if (mMtlSamplerState == nil) { |
| return DAWN_OUT_OF_MEMORY_ERROR("Failed to allocate sampler."); |
| } |
| return {}; |
| } |
| |
| id<MTLSamplerState> Sampler::GetMTLSamplerState() { |
| return mMtlSamplerState.Get(); |
| } |
| |
| } // namespace dawn::native::metal |