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// Copyright 2021 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/ExternalTexture.h"
#include "dawn_native/Device.h"
#include "dawn_native/Texture.h"
#include "dawn_native/dawn_platform.h"
namespace dawn_native {
MaybeError ValidateExternalTexturePlane(const TextureViewBase* textureView,
wgpu::TextureFormat format) {
if (textureView->GetFormat().format != format) {
return DAWN_VALIDATION_ERROR(
"The external texture descriptor specifies a texture format that is different from "
"at least one of the passed texture views.");
}
if ((textureView->GetTexture()->GetUsage() & wgpu::TextureUsage::TextureBinding) !=
wgpu::TextureUsage::TextureBinding) {
return DAWN_VALIDATION_ERROR(
"The external texture descriptor specifies a texture that was not created with "
"TextureUsage::TextureBinding.");
}
if (textureView->GetDimension() != wgpu::TextureViewDimension::e2D) {
return DAWN_VALIDATION_ERROR(
"The external texture descriptor contains a texture view with a non-2D dimension.");
}
if (textureView->GetLevelCount() > 1) {
return DAWN_VALIDATION_ERROR(
"The external texture descriptor contains a texture view with a level count "
"greater than 1.");
}
return {};
}
MaybeError ValidateExternalTextureDescriptor(const DeviceBase* device,
const ExternalTextureDescriptor* descriptor) {
ASSERT(descriptor);
ASSERT(descriptor->plane0);
DAWN_TRY(device->ValidateObject(descriptor->plane0));
const Format* format;
DAWN_TRY_ASSIGN(format, device->GetInternalFormat(descriptor->format));
DAWN_UNUSED(format);
switch (descriptor->format) {
case wgpu::TextureFormat::RGBA8Unorm:
case wgpu::TextureFormat::BGRA8Unorm:
case wgpu::TextureFormat::RGBA16Float:
DAWN_TRY(ValidateExternalTexturePlane(descriptor->plane0, descriptor->format));
break;
default:
return DAWN_VALIDATION_ERROR(
"The external texture descriptor specifies an unsupported format.");
}
return {};
}
// static
ResultOrError<Ref<ExternalTextureBase>> ExternalTextureBase::Create(
DeviceBase* device,
const ExternalTextureDescriptor* descriptor) {
Ref<ExternalTextureBase> externalTexture =
AcquireRef(new ExternalTextureBase(device, descriptor));
return std::move(externalTexture);
}
ExternalTextureBase::ExternalTextureBase(DeviceBase* device,
const ExternalTextureDescriptor* descriptor)
: ObjectBase(device, kLabelNotImplemented), mState(ExternalTextureState::Alive) {
textureViews[0] = descriptor->plane0;
}
ExternalTextureBase::ExternalTextureBase(DeviceBase* device, ObjectBase::ErrorTag tag)
: ObjectBase(device, tag) {
}
const std::array<Ref<TextureViewBase>, kMaxPlanesPerFormat>&
ExternalTextureBase::GetTextureViews() const {
return textureViews;
}
MaybeError ExternalTextureBase::ValidateCanUseInSubmitNow() const {
ASSERT(!IsError());
if (mState == ExternalTextureState::Destroyed) {
return DAWN_VALIDATION_ERROR("Destroyed external texture used in a submit");
}
return {};
}
void ExternalTextureBase::APIDestroy() {
if (GetDevice()->ConsumedError(GetDevice()->ValidateObject(this))) {
return;
}
mState = ExternalTextureState::Destroyed;
ASSERT(!IsError());
}
// static
ExternalTextureBase* ExternalTextureBase::MakeError(DeviceBase* device) {
return new ExternalTextureBase(device, ObjectBase::kError);
}
} // namespace dawn_native