1 // Copyright 2017 The Dawn Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "dawn_native/d3d12/SamplerD3D12.h" 16 17 #include "dawn_native/d3d12/DeviceD3D12.h" 18 #include "dawn_native/d3d12/UtilsD3D12.h" 19 20 namespace dawn_native { namespace d3d12 { 21 22 namespace { AddressMode(wgpu::AddressMode mode)23 D3D12_TEXTURE_ADDRESS_MODE AddressMode(wgpu::AddressMode mode) { 24 switch (mode) { 25 case wgpu::AddressMode::Repeat: 26 return D3D12_TEXTURE_ADDRESS_MODE_WRAP; 27 case wgpu::AddressMode::MirrorRepeat: 28 return D3D12_TEXTURE_ADDRESS_MODE_MIRROR; 29 case wgpu::AddressMode::ClampToEdge: 30 return D3D12_TEXTURE_ADDRESS_MODE_CLAMP; 31 } 32 } 33 } // namespace 34 35 // static Create(Device * device,const SamplerDescriptor * descriptor)36 Ref<Sampler> Sampler::Create(Device* device, const SamplerDescriptor* descriptor) { 37 return AcquireRef(new Sampler(device, descriptor)); 38 } 39 Sampler(Device * device,const SamplerDescriptor * descriptor)40 Sampler::Sampler(Device* device, const SamplerDescriptor* descriptor) 41 : SamplerBase(device, descriptor) { 42 D3D12_FILTER_TYPE minFilter; 43 switch (descriptor->minFilter) { 44 case wgpu::FilterMode::Nearest: 45 minFilter = D3D12_FILTER_TYPE_POINT; 46 break; 47 case wgpu::FilterMode::Linear: 48 minFilter = D3D12_FILTER_TYPE_LINEAR; 49 break; 50 } 51 52 D3D12_FILTER_TYPE magFilter; 53 switch (descriptor->magFilter) { 54 case wgpu::FilterMode::Nearest: 55 magFilter = D3D12_FILTER_TYPE_POINT; 56 break; 57 case wgpu::FilterMode::Linear: 58 magFilter = D3D12_FILTER_TYPE_LINEAR; 59 break; 60 } 61 62 D3D12_FILTER_TYPE mipmapFilter; 63 switch (descriptor->mipmapFilter) { 64 case wgpu::FilterMode::Nearest: 65 mipmapFilter = D3D12_FILTER_TYPE_POINT; 66 break; 67 case wgpu::FilterMode::Linear: 68 mipmapFilter = D3D12_FILTER_TYPE_LINEAR; 69 break; 70 } 71 72 D3D12_FILTER_REDUCTION_TYPE reduction = 73 descriptor->compare == wgpu::CompareFunction::Undefined 74 ? D3D12_FILTER_REDUCTION_TYPE_STANDARD 75 : D3D12_FILTER_REDUCTION_TYPE_COMPARISON; 76 77 // https://docs.microsoft.com/en-us/windows/win32/api/d3d12/ns-d3d12-d3d12_sampler_desc 78 mSamplerDesc.MaxAnisotropy = std::min<uint16_t>(GetMaxAnisotropy(), 16u); 79 80 if (mSamplerDesc.MaxAnisotropy > 1) { 81 mSamplerDesc.Filter = D3D12_ENCODE_ANISOTROPIC_FILTER(reduction); 82 } else { 83 mSamplerDesc.Filter = 84 D3D12_ENCODE_BASIC_FILTER(minFilter, magFilter, mipmapFilter, reduction); 85 } 86 87 mSamplerDesc.AddressU = AddressMode(descriptor->addressModeU); 88 mSamplerDesc.AddressV = AddressMode(descriptor->addressModeV); 89 mSamplerDesc.AddressW = AddressMode(descriptor->addressModeW); 90 mSamplerDesc.MipLODBias = 0.f; 91 92 if (descriptor->compare != wgpu::CompareFunction::Undefined) { 93 mSamplerDesc.ComparisonFunc = ToD3D12ComparisonFunc(descriptor->compare); 94 } else { 95 // Still set the function so it's not garbage. 96 mSamplerDesc.ComparisonFunc = D3D12_COMPARISON_FUNC_NEVER; 97 } 98 mSamplerDesc.MinLOD = descriptor->lodMinClamp; 99 mSamplerDesc.MaxLOD = descriptor->lodMaxClamp; 100 } 101 GetSamplerDescriptor() const102 const D3D12_SAMPLER_DESC& Sampler::GetSamplerDescriptor() const { 103 return mSamplerDesc; 104 } 105 106 }} // namespace dawn_native::d3d12 107