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Vulkan-Samples/samples/performance/swapchain_images/swapchain_images.cpp
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2025-09-04 10:54:47 +08:00

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/* Copyright (c) 2019-2025, Arm Limited and Contributors
*
* SPDX-License-Identifier: Apache-2.0
*
* 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 "swapchain_images.h"
#include "core/device.h"
#include "core/pipeline_layout.h"
#include "core/shader_module.h"
#include "filesystem/legacy.h"
#include "gltf_loader.h"
#include "gui.h"
#include "rendering/subpasses/forward_subpass.h"
#include "scene_graph/components/material.h"
#include "scene_graph/components/pbr_material.h"
#include "stats/stats.h"
SwapchainImages::SwapchainImages()
{
auto &config = get_configuration();
config.insert<vkb::IntSetting>(0, swapchain_image_count, 3);
config.insert<vkb::IntSetting>(1, swapchain_image_count, 2);
}
bool SwapchainImages::prepare(const vkb::ApplicationOptions &options)
{
if (!vkb::VulkanSampleC::prepare(options))
{
return false;
}
load_scene("scenes/sponza/Sponza01.gltf");
auto &camera_node = vkb::add_free_camera(get_scene(), "main_camera", get_render_context().get_surface_extent());
camera = &camera_node.get_component<vkb::sg::Camera>();
vkb::ShaderSource vert_shader("base.vert.spv");
vkb::ShaderSource frag_shader("base.frag.spv");
auto scene_subpass = std::make_unique<vkb::ForwardSubpass>(get_render_context(), std::move(vert_shader), std::move(frag_shader), get_scene(), *camera);
auto render_pipeline = std::make_unique<vkb::RenderPipeline>();
render_pipeline->add_subpass(std::move(scene_subpass));
set_render_pipeline(std::move(render_pipeline));
get_stats().request_stats({vkb::StatIndex::frame_times});
create_gui(*window, &get_stats());
return true;
}
void SwapchainImages::update(float delta_time)
{
// Process GUI input
if (swapchain_image_count != last_swapchain_image_count)
{
get_device().wait_idle();
// Create a new swapchain with a new swapchain image count
get_render_context().update_swapchain(swapchain_image_count);
last_swapchain_image_count = swapchain_image_count;
}
VulkanSample::update(delta_time);
}
void SwapchainImages::draw_gui()
{
get_gui().show_options_window(
/* body = */ [this]() {
ImGui::RadioButton("Double buffering", &swapchain_image_count, 2);
ImGui::SameLine();
ImGui::RadioButton("Triple buffering", &swapchain_image_count, 3);
ImGui::SameLine();
},
/* lines = */ 1);
}
std::unique_ptr<vkb::VulkanSampleC> create_swapchain_images()
{
return std::make_unique<SwapchainImages>();
}