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// 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/Sampler.h"
#include "common/HashUtils.h"
#include "dawn_native/Device.h"
#include "dawn_native/ValidationUtils_autogen.h"
#include <cmath>
namespace dawn_native {
MaybeError ValidateSamplerDescriptor(DeviceBase*, const SamplerDescriptor* descriptor) {
if (descriptor->nextInChain != nullptr) {
return DAWN_VALIDATION_ERROR("nextInChain must be nullptr");
}
if (!std::isfinite(descriptor->lodMinClamp) || !std::isfinite(descriptor->lodMaxClamp)) {
return DAWN_VALIDATION_ERROR("LOD must be finite");
}
if (descriptor->lodMinClamp < 0 || descriptor->lodMaxClamp < 0) {
return DAWN_VALIDATION_ERROR("LOD must be positive");
}
if (descriptor->lodMinClamp > descriptor->lodMaxClamp) {
return DAWN_VALIDATION_ERROR(
"Min lod clamp value cannot greater than max lod clamp value");
}
DAWN_TRY(ValidateFilterMode(descriptor->minFilter));
DAWN_TRY(ValidateFilterMode(descriptor->magFilter));
DAWN_TRY(ValidateFilterMode(descriptor->mipmapFilter));
DAWN_TRY(ValidateAddressMode(descriptor->addressModeU));
DAWN_TRY(ValidateAddressMode(descriptor->addressModeV));
DAWN_TRY(ValidateAddressMode(descriptor->addressModeW));
DAWN_TRY(ValidateCompareFunction(descriptor->compare));
return {};
}
// SamplerBase
SamplerBase::SamplerBase(DeviceBase* device,
const SamplerDescriptor* descriptor,
bool blueprint)
: ObjectBase(device),
mAddressModeU(descriptor->addressModeU),
mAddressModeV(descriptor->addressModeV),
mAddressModeW(descriptor->addressModeW),
mMagFilter(descriptor->magFilter),
mMinFilter(descriptor->minFilter),
mMipmapFilter(descriptor->mipmapFilter),
mLodMinClamp(descriptor->lodMinClamp),
mLodMaxClamp(descriptor->lodMaxClamp),
mCompareFunction(descriptor->compare),
mIsBlueprint(blueprint) {
}
SamplerBase::SamplerBase(DeviceBase* device, ObjectBase::ErrorTag tag)
: ObjectBase(device, tag) {
}
SamplerBase::~SamplerBase() {
// Do not uncache the actual cached object if we are a blueprint
if (!mIsBlueprint && !IsError()) {
GetDevice()->UncacheSampler(this);
}
}
// static
SamplerBase* SamplerBase::MakeError(DeviceBase* device) {
return new SamplerBase(device, ObjectBase::kError);
}
size_t SamplerBase::HashFunc::operator()(const SamplerBase* module) const {
size_t hash = 0;
HashCombine(&hash, module->mAddressModeU);
HashCombine(&hash, module->mAddressModeV);
HashCombine(&hash, module->mAddressModeW);
HashCombine(&hash, module->mMagFilter);
HashCombine(&hash, module->mMinFilter);
HashCombine(&hash, module->mMipmapFilter);
HashCombine(&hash, module->mLodMinClamp);
HashCombine(&hash, module->mLodMaxClamp);
HashCombine(&hash, module->mCompareFunction);
return hash;
}
bool SamplerBase::EqualityFunc::operator()(const SamplerBase* a, const SamplerBase* b) const {
if (a == b) {
return true;
}
ASSERT(std::isfinite(a->mLodMinClamp));
ASSERT(std::isfinite(b->mLodMinClamp));
ASSERT(std::isfinite(a->mLodMaxClamp));
ASSERT(std::isfinite(b->mLodMaxClamp));
return a->mAddressModeU == b->mAddressModeU && a->mAddressModeV == b->mAddressModeV &&
a->mAddressModeW == b->mAddressModeW && a->mMagFilter == b->mMagFilter &&
a->mMinFilter == b->mMinFilter && a->mMipmapFilter == b->mMipmapFilter &&
a->mLodMinClamp == b->mLodMinClamp && a->mLodMaxClamp == b->mLodMaxClamp &&
a->mCompareFunction == b->mCompareFunction;
}
} // namespace dawn_native