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// Copyright 2020 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/CommandRecordingContext.h"
#include "common/Assert.h"
namespace dawn::native::metal {
CommandRecordingContext::CommandRecordingContext() = default;
CommandRecordingContext::~CommandRecordingContext() {
// Commands must be acquired.
ASSERT(mCommands == nullptr);
}
id<MTLCommandBuffer> CommandRecordingContext::GetCommands() {
return mCommands.Get();
}
void CommandRecordingContext::MarkUsed() {
mUsed = true;
}
bool CommandRecordingContext::WasUsed() const {
return mUsed;
}
MaybeError CommandRecordingContext::PrepareNextCommandBuffer(id<MTLCommandQueue> queue) {
ASSERT(mCommands == nil);
ASSERT(!mUsed);
// The MTLCommandBuffer will be autoreleased by default.
// The autorelease pool may drain before the command buffer is submitted. Retain so it stays
// alive.
mCommands = AcquireNSPRef([[queue commandBuffer] retain]);
if (mCommands == nil) {
return DAWN_INTERNAL_ERROR("Failed to allocate an MTLCommandBuffer");
}
return {};
}
NSPRef<id<MTLCommandBuffer>> CommandRecordingContext::AcquireCommands() {
// A blit encoder can be left open from WriteBuffer, make sure we close it.
if (mCommands != nullptr) {
EndBlit();
}
ASSERT(!mInEncoder);
mUsed = false;
return std::move(mCommands);
}
id<MTLBlitCommandEncoder> CommandRecordingContext::EnsureBlit() {
ASSERT(mCommands != nullptr);
if (mBlit == nullptr) {
ASSERT(!mInEncoder);
mInEncoder = true;
// The encoder is created autoreleased. Retain it to avoid the autoreleasepool from
// draining from under us.
mBlit.Acquire([[*mCommands blitCommandEncoder] retain]);
}
return mBlit.Get();
}
void CommandRecordingContext::EndBlit() {
ASSERT(mCommands != nullptr);
if (mBlit != nullptr) {
[*mBlit endEncoding];
mBlit = nullptr;
mInEncoder = false;
}
}
id<MTLComputeCommandEncoder> CommandRecordingContext::BeginCompute() {
ASSERT(mCommands != nullptr);
ASSERT(mCompute == nullptr);
ASSERT(!mInEncoder);
mInEncoder = true;
// The encoder is created autoreleased. Retain it to avoid the autoreleasepool from
// draining from under us.
mCompute.Acquire([[*mCommands computeCommandEncoder] retain]);
return mCompute.Get();
}
void CommandRecordingContext::EndCompute() {
ASSERT(mCommands != nullptr);
ASSERT(mCompute != nullptr);
[*mCompute endEncoding];
mCompute = nullptr;
mInEncoder = false;
}
id<MTLRenderCommandEncoder> CommandRecordingContext::BeginRender(
MTLRenderPassDescriptor* descriptor) {
ASSERT(mCommands != nullptr);
ASSERT(mRender == nullptr);
ASSERT(!mInEncoder);
mInEncoder = true;
// The encoder is created autoreleased. Retain it to avoid the autoreleasepool from
// draining from under us.
mRender.Acquire([[*mCommands renderCommandEncoderWithDescriptor:descriptor] retain]);
return mRender.Get();
}
void CommandRecordingContext::EndRender() {
ASSERT(mCommands != nullptr);
ASSERT(mRender != nullptr);
[*mRender endEncoding];
mRender = nullptr;
mInEncoder = false;
}
} // namespace dawn::native::metal