Added initial implementation of Vulkan Render Passes.

gpu/vulkan/vulkan_command_buffer.cc

Index: gpu/vulkan/vulkan_command_buffer.cc
diff --git a/gpu/vulkan/vulkan_command_buffer.cc b/gpu/vulkan/vulkan_command_buffer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..07c5febec21c6e24b9fcb4b1368a4a2260b447d5
--- /dev/null
+++ b/gpu/vulkan/vulkan_command_buffer.cc
@@ -0,0 +1,109 @@
+// Copyright (c) 2016 The Chromium 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 "gpu/vulkan/vulkan_command_buffer.h"
+
+#include "gpu/vulkan/vulkan_command_pool.h"
+#include "gpu/vulkan/vulkan_implementation.h"
+
+namespace gpu {
+
+VulkanCommandBuffer::VulkanCommandBuffer(VulkanCommandPool* command_pool,
+                                         bool primary)
+    : primary_(primary), command_pool_(command_pool) {
+  command_pool_->IncrementCommandBufferCount();
+}
+
+VulkanCommandBuffer::~VulkanCommandBuffer() {
+  DCHECK_EQ(static_cast<VkCommandBuffer>(VK_NULL_HANDLE), command_buffer_);
+  DCHECK(!recording_);
+  command_pool_->DecrementCommandBufferCount();
+}
+
+bool VulkanCommandBuffer::Initialize() {
+  VkCommandBufferAllocateInfo command_buffer_info = {};
+  command_buffer_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
+  command_buffer_info.commandPool = command_pool_->handle();
+  command_buffer_info.level = primary_ ? VK_COMMAND_BUFFER_LEVEL_PRIMARY
+                                       : VK_COMMAND_BUFFER_LEVEL_SECONDARY;
+  command_buffer_info.commandBufferCount = 1;
+
+  VkResult result = vkAllocateCommandBuffers(
+      GetVulkanDevice(), &command_buffer_info, &command_buffer_);
+  if (VK_SUCCESS != result) {
+    DLOG(ERROR) << "vkAllocateCommandBuffers() failed: " << result;
+    return false;
+  }
+  return true;
+}
+
+void VulkanCommandBuffer::Destroy() {
+  if (VK_NULL_HANDLE != command_buffer_) {
+    vkFreeCommandBuffers(GetVulkanDevice(), command_pool_->handle(), 1,
+                         &command_buffer_);
+    command_buffer_ = VK_NULL_HANDLE;
+  }
+}
+
+bool VulkanCommandBuffer::Submit(VkQueue queue,
+                                 uint32_t num_wait_semaphores,
+                                 VkSemaphore* wait_semaphores,
+                                 uint32_t num_signal_semaphores,
+                                 VkSemaphore* signal_semaphores) {
+  DCHECK(primary_);
+  VkSubmitInfo submit_info = {};
+  submit_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+  submit_info.commandBufferCount = 1;
+  submit_info.pCommandBuffers = &command_buffer_;
+
+  if (num_wait_semaphores) {

[piman, 2016/03/11 03:07:52]

nit: the if here and below are unnecessary, in fact (the cost of the test is
higher than the cost of setting the extra field on the stack).

[David Yen, 2016/03/21 18:26:31]

Good point. Done.

+    submit_info.waitSemaphoreCount = num_wait_semaphores;
+    submit_info.pWaitSemaphores = wait_semaphores;
+  }
+
+  if (num_signal_semaphores) {
+    submit_info.signalSemaphoreCount = num_signal_semaphores;
+    submit_info.pSignalSemaphores = signal_semaphores;
+  }
+
+  VkResult result = vkQueueSubmit(queue, 1, &submit_info, VK_NULL_HANDLE);
+  PostExecution();
+  if (VK_SUCCESS != result) {
+    DLOG(ERROR) << "vkQueueSubmit() failed: " << result;
+    return false;
+  }
+
+  return true;
+}
+
+void VulkanCommandBuffer::Enqueue(VkCommandBuffer primary_command_buffer) {
+  DCHECK(!primary_);
+  vkCmdExecuteCommands(primary_command_buffer, 1, &command_buffer_);
+  PostExecution();
+}
+
+void VulkanCommandBuffer::PostExecution() {
+  if (record_type_ == RECORD_TYPE_SINGLE_USE) {
+    // Clear upon next use.
+    record_type_ = RECORD_TYPE_DIRTY;
+  } else if (record_type_ == RECORD_TYPE_MULTI_USE) {
+    // Can no longer record new items unless marked as clear.
+    record_type_ = RECORD_TYPE_RECORDED;
+  }
+}
+
+void VulkanCommandBuffer::ResetIfDirty() {
+  DCHECK(!recording_);
+  if (record_type_ == RECORD_TYPE_DIRTY) {
+    vkResetCommandPool(GetVulkanDevice(), command_pool_->handle(),
+                       VK_COMMAND_POOL_RESET_RELEASE_RESOURCES_BIT);
+    record_type_ = RECORD_TYPE_EMPTY;
+  }
+}
+
+CommandBufferRecorderBase::~CommandBufferRecorderBase() {
+  vkEndCommandBuffer(handle_);
+};
+
+}  // namespace gpu