Implicit surface rendering via ray tracing
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/*
* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
*
* 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.
*
* SPDX-FileCopyrightText: Copyright (c) 2014-2022 NVIDIA CORPORATION
* SPDX-License-Identifier: Apache-2.0
*/
#include "application.hpp"
#include "nvh/commandlineparser.hpp"
#include "nvh/nvprint.hpp"
#include "nvp/nvpsystem.hpp"
#include "nvh/timesampler.hpp"
#include "nvvk/error_vk.hpp"
namespace nvvkhl {
//--------------------------------------------------------------------------------------------------
// This testing element allow to
// - Capture Vulkan validation errors, if any return error code 1
// - Dump the result image to disk (CurrentPath/"name of project".bmp)
//
// At startup, it looks for arguments
// --test (bool) Enable testing
// --snapshot (bool) Saving or not image
// --frames: (int) number of iteration frame the application do before sending a close signal
class ElementTesting : public nvvkhl::IAppElement
{
struct Settings
{
bool enabled{false};
bool snapshot{false};
uint32_t maxFrames{5};
} m_settings;
public:
ElementTesting(int argc, char** argv)
{
nvh::CommandLineParser cmd_parser("");
cmd_parser.addArgument({"--test"}, &m_settings.enabled, "Enable testing");
cmd_parser.addArgument({"--snapshot"}, &m_settings.snapshot, "Take and save a snapshot");
cmd_parser.addArgument({"--frames"}, &m_settings.maxFrames, "Max number of frames");
cmd_parser.parse(argc, argv);
};
~ElementTesting() = default;
void onAttach(Application* app) override
{
m_app = app;
m_startTime.reset();
if(m_settings.enabled)
{
VkDebugUtilsMessengerCreateInfoEXT dbg_messenger_create_info{VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT};
dbg_messenger_create_info.messageSeverity = VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT // Vulkan issues
| VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT; // Invalid usage
dbg_messenger_create_info.messageType = VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT // Other
| VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT; // Violation of spec
dbg_messenger_create_info.pUserData = this;
// Trapping in the callback the validation errors that could show up. If errors are found errorCode will return 1, otherwise 0
dbg_messenger_create_info.pfnUserCallback = [](VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity,
VkDebugUtilsMessageTypeFlagsEXT messageType,
const VkDebugUtilsMessengerCallbackDataEXT* callbackData, void* userData) {
ElementTesting* testing = reinterpret_cast<ElementTesting*>(userData);
if(messageSeverity & VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT)
{
testing->addError(callbackData->pMessage);
}
return VK_FALSE;
};
NVVK_CHECK(vkCreateDebugUtilsMessengerEXT(m_app->getContext()->m_instance, &dbg_messenger_create_info, nullptr, &m_dbgMessenger));
}
}
void onDetach() override
{
if(m_settings.enabled)
{
vkDestroyDebugUtilsMessengerEXT(m_app->getContext()->m_instance, m_dbgMessenger, nullptr);
// Signal errors
if(!m_errorMessages.empty())
{
LOGE("+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n");
for(auto& e : m_errorMessages)
LOGE("%s\n", e.c_str());
LOGE("+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n");
}
}
}
void onRender(VkCommandBuffer cmd) override
{
if(!m_settings.enabled)
return;
m_counter++;
if(m_counter >= m_settings.maxFrames)
{
if(m_settings.snapshot)
{
std::string name = std::string("snap_") + std::string(PROJECT_NAME) + std::string(".png");
NVPSystem::windowScreenshot(m_app->getWindowHandle(), name.c_str());
LOGI("Saving image: %s \n", name.c_str());
}
LOGI("Testing Time: %.3f ms\n", m_startTime.elapsed());
m_app->close(); // request to stop
}
}
void addError(const char* msg) { m_errorMessages.emplace_back(msg); }
int errorCode() { return m_errorMessages.empty() ? 0 : 1; }
bool enabled() { return m_settings.enabled; }
private:
Application* m_app{nullptr};
uint32_t m_counter{0};
VkDebugUtilsMessengerEXT m_dbgMessenger = nullptr;
std::vector<std::string> m_errorMessages;
nvh::Stopwatch m_startTime;
};
} // namespace nvvkhl