command_buffer.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "impeller/renderer/command_buffer.h"
 
#include "flutter/fml/trace_event.h"
#include "impeller/renderer/compute_pass.h"
#include "impeller/renderer/render_pass.h"
#include "impeller/renderer/render_target.h"
 
namespace impeller {
 
CommandBuffer::CommandBuffer(std::weak_ptr<const Context> context)
    : context_(std::move(context)) {}
 
CommandBuffer::~CommandBuffer() = default;
 
bool CommandBuffer::SubmitCommands(const CompletionCallback& callback) {
  TRACE_EVENT0("impeller", "CommandBuffer::SubmitCommands");
  if (!IsValid()) {
    // Already committed or was never valid. Either way, this is caller error.
    if (callback) {
      callback(Status::kError);
    }
    return false;
  }
  return OnSubmitCommands(callback);
}
 
bool CommandBuffer::SubmitCommands() {
  return SubmitCommands(nullptr);
}
 
void CommandBuffer::WaitUntilScheduled() {
  return OnWaitUntilScheduled();
}
 
bool CommandBuffer::EncodeAndSubmit(
    const std::shared_ptr<RenderPass>& render_pass) {
  TRACE_EVENT0("impeller", "CommandBuffer::EncodeAndSubmit");
  if (!render_pass->IsValid() || !IsValid()) {
    return false;
  }
  if (!render_pass->EncodeCommands()) {
    return false;
  }
 
  return SubmitCommands(nullptr);
}
 
bool CommandBuffer::EncodeAndSubmit(
    const std::shared_ptr<BlitPass>& blit_pass,
    const std::shared_ptr<Allocator>& allocator) {
  TRACE_EVENT0("impeller", "CommandBuffer::EncodeAndSubmit");
  if (!blit_pass->IsValid() || !IsValid()) {
    return false;
  }
  if (!blit_pass->EncodeCommands(allocator)) {
    return false;
  }
 
  return SubmitCommands(nullptr);
}
 
std::shared_ptr<RenderPass> CommandBuffer::CreateRenderPass(
    const RenderTarget& render_target) {
  auto pass = OnCreateRenderPass(render_target);
  if (pass && pass->IsValid()) {
    pass->SetLabel("RenderPass");
    return pass;
  }
  return nullptr;
}
 
std::shared_ptr<BlitPass> CommandBuffer::CreateBlitPass() {
  auto pass = OnCreateBlitPass();
  if (pass && pass->IsValid()) {
    pass->SetLabel("BlitPass");
    return pass;
  }
  return nullptr;
}
 
std::shared_ptr<ComputePass> CommandBuffer::CreateComputePass() {
  if (!IsValid()) {
    return nullptr;
  }
  auto pass = OnCreateComputePass();
  if (pass && pass->IsValid()) {
    pass->SetLabel("ComputePass");
    return pass;
  }
  return nullptr;
}
 
}  // namespace impeller