この節では頂点シェーダからフラグメントシェーダにデータを渡す方法について書きます。いよいよ三角形の色が自由に変えられるようになります！
今回解説する内容は単に色を付けるというだけでなく、次章で行うテクスチャマッピング(画像データをポリゴンに張り付ける)の理解においてもとても重要な話です。
頂点シェーダに色データを渡す
前節で頂点シェーダに様々な情報を渡す方法を学びました。頂点に適当な色を決めて、頂点シェーダにその色情報を渡すようにしてみましょう。
struct Vertex {
Vec2 pos;
Vec3 color;
};
// 頂点データ
std::vector<Vertex> vertices = {
Vertex{ Vec2{ 0.0f, -0.5f }, Vec3{ 1.0, 0.0, 0.0 }, }, // 赤
Vertex{ Vec2{ 0.5f, 0.5f }, Vec3{ 0.0, 1.0, 0.0 }, }, // 緑
Vertex{ Vec2{ -0.5f, 0.5f }, Vec3{ 0.0, 0.0, 1.0 }, }, // 青
};
// デスクリプション
vk::VertexInputBindingDescription vertexBindingDescription[1];
vertexBindingDescription[0].binding = 0;
vertexBindingDescription[0].stride = sizeof(Vertex);
vertexBindingDescription[0].inputRate = vk::VertexInputRate::eVertex;
vk::VertexInputAttributeDescription vertexInputDescription[2];
vertexInputDescription[0].binding = 0;
vertexInputDescription[0].location = 0;
vertexInputDescription[0].format = vk::Format::eR32G32Sfloat;
vertexInputDescription[0].offset = offsetof(Vertex, pos);
vertexInputDescription[1].binding = 0;
vertexInputDescription[1].location = 1;
vertexInputDescription[1].format = vk::Format::eR32G32B32Sfloat;
vertexInputDescription[1].offset = offsetof(Vertex, color);
vk::PipelineVertexInputStateCreateInfo vertexInputInfo;
vertexInputInfo.vertexBindingDescriptionCount = std::size(vertexBindingDescription);
vertexInputInfo.pVertexBindingDescriptions = vertexBindingDescription;
vertexInputInfo.vertexAttributeDescriptionCount = std::size(vertexInputDescription);
vertexInputInfo.pVertexAttributeDescriptions = vertexInputDescription;
// バッファのバインド
cmdBufs[0]->bindVertexBuffers(0, { vertexBuf.get() }, { 0 });
// 頂点シェーダ
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) in vec2 inPos;
layout(location = 1) in vec3 inColor; // 頂点の色データ
void main() {
gl_Position = vec4(inPos, 0.0, 1.0);
}
ここで渡したデータを頂点シェーダからフラグメントシェーダに渡していきます。
フラグメントシェーダにデータを渡す
頂点シェーダに以下の2行を追加します。
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) in vec2 inPos;
layout(location = 1) in vec3 inColor;
layout(location = 0) out vec3 fragmentColor; // 追加
void main() {
gl_Position = vec4(inPos, 0.0, 1.0);
fragmentColor = inColor; // 追加
}
fragmentColorという出力変数を追加しました。outという指定が付いていると出力を意味し、頂点シェーダから出力された変数はフラグメントシェーダに渡されます。
フラグメントシェーダのコード
改めて今までのフラグメントシェーダのコードを見てみましょう。
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) out vec4 outColor;
void main() {
outColor = vec4(1.0, 0.0, 0.0, 1.0);
}
フラグメントシェーダがピクセルごとに実行されて各ピクセルの色が決まるのでした。今までは固定の数値で真っ赤にしていましたが、これを変数を使って変えられるようにします。
フラグメントシェーダのコードを以下のように変更します。
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) in vec3 fragmentColor;
layout(location = 0) out vec4 outColor;
void main() {
outColor = vec4(fragmentColor, 1.0);
}
頂点シェーダによる色データをfragmentColorとして受け取り、受け取った色情報をoutColorに流しています。頂点シェーダのfragmentColorと location = 0の指定を揃えてあることに注意しましょう。
locationの数字で繋がっているのであって変数名は別に本質ではないので、頂点シェーダとフラグメントシェーダの側で名前を揃える必要は特にありません。
以上の変更を行った上で実行してみましょう。頂点シェーダ、フラグメントシェーダ共にglslcによるシェーダのコンパイルを忘れないように。
赤、緑、青と各頂点が指定の色になっていますね！
ここで気になるのが各頂点の間のピクセルです。グラデーションのようになっていますね。フラグメントシェーダはピクセル1つごとに呼ばれるので、この間の部分の領域でも1ピクセルごとにフラグメントシェーダが呼ばれているはずです。どうなっているのでしょうか？
データの補間
実は、頂点シェーダからフラグメントシェーダに渡される数値は線形補間が行われます。 例えば2つの頂点に10.0と20.0という数値を渡したら、その中間地点のピクセルでは15.0になるといった具合です。
三角形の内側でも同じ話で、間の数値は線形な式で算出されます。一般的なグラフィックスパイプラインはこういう仕様です。 先ほどのグラデーションはその結果になります。
これらの補間処理はGPUが勝手にやってくれるものです。 GPUを利用している側の私たちはその処理の仕組みについてあまり気にする必要はありません。
この節では頂点シェーダからフラグメントシェーダに値を渡す方法、そして各頂点で出力された数値はその間のピクセルにおいて線形補間が行われることを学びました。
次節ではインデックスバッファというものを学びます。この節のコード
#include <iostream>
#include <fstream>
#include <filesystem>
#include <vulkan/vulkan.hpp>
#include <GLFW/glfw3.h>
const uint32_t screenWidth = 640;
const uint32_t screenHeight = 480;
struct Vec2 {
float x, y;
};
struct Vec3 {
float x, y, z;
};
struct Vertex {
Vec2 pos;
Vec3 color;
};
std::vector<Vertex> vertices = {
Vertex{ Vec2{ 0.0f, -0.5f }, Vec3{ 1.0, 0.0, 0.0 }, },
Vertex{ Vec2{ 0.5f, 0.5f }, Vec3{ 0.0, 1.0, 0.0 }, },
Vertex{ Vec2{ -0.5f, 0.5f }, Vec3{ 0.0, 0.0, 1.0 }, },
};
int main() {
if (!glfwInit())
return -1;
uint32_t requiredExtensionsCount;
const char** requiredExtensions = glfwGetRequiredInstanceExtensions(&requiredExtensionsCount);
vk::InstanceCreateInfo createInfo;
createInfo.enabledExtensionCount = requiredExtensionsCount;
createInfo.ppEnabledExtensionNames = requiredExtensions;
vk::UniqueInstance instance;
instance = vk::createInstanceUnique(createInfo);
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
GLFWwindow* window;
window = glfwCreateWindow(screenWidth, screenHeight, "GLFW Test Window", NULL, NULL);
if (!window) {
const char* err;
glfwGetError(&err);
std::cout << err << std::endl;
glfwTerminate();
return -1;
}
VkSurfaceKHR c_surface;
auto result = glfwCreateWindowSurface(instance.get(), window, nullptr, &c_surface);
if (result != VK_SUCCESS) {
const char* err;
glfwGetError(&err);
std::cout << err << std::endl;
glfwTerminate();
return -1;
}
vk::UniqueSurfaceKHR surface{ c_surface, instance.get() };
std::vector<vk::PhysicalDevice> physicalDevices = instance->enumeratePhysicalDevices();
vk::PhysicalDevice physicalDevice;
bool existsSuitablePhysicalDevice = false;
uint32_t graphicsQueueFamilyIndex;
for (size_t i = 0; i < physicalDevices.size(); i++) {
std::vector<vk::QueueFamilyProperties> queueProps = physicalDevices[i].getQueueFamilyProperties();
bool existsGraphicsQueue = false;
for (size_t j = 0; j < queueProps.size(); j++) {
if (queueProps[j].queueFlags & vk::QueueFlagBits::eGraphics &&
physicalDevices[i].getSurfaceSupportKHR(j, surface.get())) {
existsGraphicsQueue = true;
graphicsQueueFamilyIndex = j;
break;
}
}
std::vector<vk::ExtensionProperties> extProps = physicalDevices[i].enumerateDeviceExtensionProperties();
bool supportsSwapchainExtension = false;
for (size_t j = 0; j < extProps.size(); j++) {
if (std::string_view(extProps[j].extensionName.data()) == VK_KHR_SWAPCHAIN_EXTENSION_NAME) {
supportsSwapchainExtension = true;
break;
}
}
if (existsGraphicsQueue && supportsSwapchainExtension) {
physicalDevice = physicalDevices[i];
existsSuitablePhysicalDevice = true;
break;
}
}
if (!existsSuitablePhysicalDevice) {
std::cerr << "使用可能な物理デバイスがありません。" << std::endl;
return -1;
}
vk::DeviceCreateInfo devCreateInfo;
auto devRequiredExtensions = { VK_KHR_SWAPCHAIN_EXTENSION_NAME };
devCreateInfo.enabledExtensionCount = devRequiredExtensions.size();
devCreateInfo.ppEnabledExtensionNames = devRequiredExtensions.begin();
vk::DeviceQueueCreateInfo queueCreateInfo[1];
queueCreateInfo[0].queueFamilyIndex = graphicsQueueFamilyIndex;
queueCreateInfo[0].queueCount = 1;
float queuePriorities[1] = { 1.0 };
queueCreateInfo[0].pQueuePriorities = queuePriorities;
devCreateInfo.pQueueCreateInfos = queueCreateInfo;
devCreateInfo.queueCreateInfoCount = 1;
vk::UniqueDevice device = physicalDevice.createDeviceUnique(devCreateInfo);
vk::Queue graphicsQueue = device->getQueue(graphicsQueueFamilyIndex, 0);
vk::BufferCreateInfo vertBufferCreateInfo;
vertBufferCreateInfo.size = sizeof(Vertex) * vertices.size();
vertBufferCreateInfo.usage = vk::BufferUsageFlagBits::eVertexBuffer;
vertBufferCreateInfo.sharingMode = vk::SharingMode::eExclusive;
vk::PhysicalDeviceMemoryProperties memProps = physicalDevice.getMemoryProperties();
vk::UniqueBuffer vertexBuf = device->createBufferUnique(vertBufferCreateInfo);
vk::MemoryRequirements vertexBufMemReq = device->getBufferMemoryRequirements(vertexBuf.get());
vk::MemoryAllocateInfo vertexBufMemAllocInfo;
vertexBufMemAllocInfo.allocationSize = vertexBufMemReq.size;
bool suitableMemoryTypeFound = false;
for (uint32_t i = 0; i < memProps.memoryTypeCount; i++) {
if (vertexBufMemReq.memoryTypeBits & (1 << i) &&
(memProps.memoryTypes[i].propertyFlags & vk::MemoryPropertyFlagBits::eHostVisible)) {
vertexBufMemAllocInfo.memoryTypeIndex = i;
suitableMemoryTypeFound = true;
break;
}
}
if (!suitableMemoryTypeFound) {
std::cerr << "適切なメモリタイプが存在しません。" << std::endl;
return -1;
}
vk::UniqueDeviceMemory vertexBufMemory = device->allocateMemoryUnique(vertexBufMemAllocInfo);
device->bindBufferMemory(vertexBuf.get(), vertexBufMemory.get(), 0);
void* vertexBufMem = device->mapMemory(vertexBufMemory.get(), 0, sizeof(Vertex) * vertices.size());
std::memcpy(vertexBufMem, vertices.data(), sizeof(Vertex) * vertices.size());
vk::MappedMemoryRange flushMemoryRange;
flushMemoryRange.memory = vertexBufMemory.get();
flushMemoryRange.offset = 0;
flushMemoryRange.size = sizeof(Vertex) * vertices.size();
device->flushMappedMemoryRanges({ flushMemoryRange });
device->unmapMemory(vertexBufMemory.get());
std::vector<vk::SurfaceFormatKHR> surfaceFormats = physicalDevice.getSurfaceFormatsKHR(surface.get());
std::vector<vk::PresentModeKHR> surfacePresentModes = physicalDevice.getSurfacePresentModesKHR(surface.get());
vk::SurfaceFormatKHR swapchainFormat = surfaceFormats[0];
vk::PresentModeKHR swapchainPresentMode = surfacePresentModes[0];
vk::AttachmentDescription attachments[1];
attachments[0].format = swapchainFormat.format;
attachments[0].samples = vk::SampleCountFlagBits::e1;
attachments[0].loadOp = vk::AttachmentLoadOp::eClear;
attachments[0].storeOp = vk::AttachmentStoreOp::eStore;
attachments[0].stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
attachments[0].stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
attachments[0].initialLayout = vk::ImageLayout::eUndefined;
attachments[0].finalLayout = vk::ImageLayout::ePresentSrcKHR;
vk::AttachmentReference subpass0_attachmentRefs[1];
subpass0_attachmentRefs[0].attachment = 0;
subpass0_attachmentRefs[0].layout = vk::ImageLayout::eColorAttachmentOptimal;
vk::SubpassDescription subpasses[1];
subpasses[0].pipelineBindPoint = vk::PipelineBindPoint::eGraphics;
subpasses[0].colorAttachmentCount = 1;
subpasses[0].pColorAttachments = subpass0_attachmentRefs;
vk::RenderPassCreateInfo renderpassCreateInfo;
renderpassCreateInfo.attachmentCount = 1;
renderpassCreateInfo.pAttachments = attachments;
renderpassCreateInfo.subpassCount = 1;
renderpassCreateInfo.pSubpasses = subpasses;
renderpassCreateInfo.dependencyCount = 0;
renderpassCreateInfo.pDependencies = nullptr;
vk::UniqueRenderPass renderpass = device->createRenderPassUnique(renderpassCreateInfo);
vk::Viewport viewports[1];
viewports[0].x = 0.0;
viewports[0].y = 0.0;
viewports[0].minDepth = 0.0;
viewports[0].maxDepth = 1.0;
viewports[0].width = screenWidth;
viewports[0].height = screenHeight;
vk::Rect2D scissors[1];
scissors[0].offset = vk::Offset2D{ 0, 0 };
scissors[0].extent = vk::Extent2D{ screenWidth, screenHeight };
vk::PipelineViewportStateCreateInfo viewportState;
viewportState.viewportCount = 1;
viewportState.pViewports = viewports;
viewportState.scissorCount = 1;
viewportState.pScissors = scissors;
vk::VertexInputBindingDescription vertexBindingDescription[1];
vertexBindingDescription[0].binding = 0;
vertexBindingDescription[0].stride = sizeof(Vertex);
vertexBindingDescription[0].inputRate = vk::VertexInputRate::eVertex;
vk::VertexInputAttributeDescription vertexInputDescription[2];
vertexInputDescription[0].binding = 0;
vertexInputDescription[0].location = 0;
vertexInputDescription[0].format = vk::Format::eR32G32Sfloat;
vertexInputDescription[0].offset = offsetof(Vertex, pos);
vertexInputDescription[1].binding = 0;
vertexInputDescription[1].location = 1;
vertexInputDescription[1].format = vk::Format::eR32G32B32Sfloat;
vertexInputDescription[1].offset = offsetof(Vertex, color);
vk::PipelineVertexInputStateCreateInfo vertexInputInfo;
vertexInputInfo.vertexBindingDescriptionCount = std::size(vertexBindingDescription);
vertexInputInfo.pVertexBindingDescriptions = vertexBindingDescription;
vertexInputInfo.vertexAttributeDescriptionCount = std::size(vertexInputDescription);
vertexInputInfo.pVertexAttributeDescriptions = vertexInputDescription;
vk::PipelineInputAssemblyStateCreateInfo inputAssembly;
inputAssembly.topology = vk::PrimitiveTopology::eTriangleList;
inputAssembly.primitiveRestartEnable = false;
vk::PipelineRasterizationStateCreateInfo rasterizer;
rasterizer.depthClampEnable = false;
rasterizer.rasterizerDiscardEnable = false;
rasterizer.polygonMode = vk::PolygonMode::eFill;
rasterizer.lineWidth = 1.0f;
rasterizer.cullMode = vk::CullModeFlagBits::eBack;
rasterizer.frontFace = vk::FrontFace::eClockwise;
rasterizer.depthBiasEnable = false;
vk::PipelineMultisampleStateCreateInfo multisample;
multisample.sampleShadingEnable = false;
multisample.rasterizationSamples = vk::SampleCountFlagBits::e1;
vk::PipelineColorBlendAttachmentState blendattachment[1];
blendattachment[0].colorWriteMask =
vk::ColorComponentFlagBits::eA |
vk::ColorComponentFlagBits::eR |
vk::ColorComponentFlagBits::eG |
vk::ColorComponentFlagBits::eB;
blendattachment[0].blendEnable = false;
vk::PipelineColorBlendStateCreateInfo blend;
blend.logicOpEnable = false;
blend.attachmentCount = 1;
blend.pAttachments = blendattachment;
vk::PipelineLayoutCreateInfo layoutCreateInfo;
layoutCreateInfo.setLayoutCount = 0;
layoutCreateInfo.pSetLayouts = nullptr;
vk::UniquePipelineLayout pipelineLayout = device->createPipelineLayoutUnique(layoutCreateInfo);
size_t vertSpvFileSz = std::filesystem::file_size("shader.vert.spv");
std::ifstream vertSpvFile("shader.vert.spv", std::ios_base::binary);
std::vector<char> vertSpvFileData(vertSpvFileSz);
vertSpvFile.read(vertSpvFileData.data(), vertSpvFileSz);
vk::ShaderModuleCreateInfo vertShaderCreateInfo;
vertShaderCreateInfo.codeSize = vertSpvFileSz;
vertShaderCreateInfo.pCode = reinterpret_cast<const uint32_t*>(vertSpvFileData.data());
vk::UniqueShaderModule vertShader = device->createShaderModuleUnique(vertShaderCreateInfo);
size_t fragSpvFileSz = std::filesystem::file_size("shader.frag.spv");
std::ifstream fragSpvFile("shader.frag.spv", std::ios_base::binary);
std::vector<char> fragSpvFileData(fragSpvFileSz);
fragSpvFile.read(fragSpvFileData.data(), fragSpvFileSz);
vk::ShaderModuleCreateInfo fragShaderCreateInfo;
fragShaderCreateInfo.codeSize = fragSpvFileSz;
fragShaderCreateInfo.pCode = reinterpret_cast<const uint32_t*>(fragSpvFileData.data());
vk::UniqueShaderModule fragShader = device->createShaderModuleUnique(fragShaderCreateInfo);
vk::PipelineShaderStageCreateInfo shaderStage[2];
shaderStage[0].stage = vk::ShaderStageFlagBits::eVertex;
shaderStage[0].module = vertShader.get();
shaderStage[0].pName = "main";
shaderStage[1].stage = vk::ShaderStageFlagBits::eFragment;
shaderStage[1].module = fragShader.get();
shaderStage[1].pName = "main";
vk::GraphicsPipelineCreateInfo pipelineCreateInfo;
pipelineCreateInfo.pViewportState = &viewportState;
pipelineCreateInfo.pVertexInputState = &vertexInputInfo;
pipelineCreateInfo.pInputAssemblyState = &inputAssembly;
pipelineCreateInfo.pRasterizationState = &rasterizer;
pipelineCreateInfo.pMultisampleState = &multisample;
pipelineCreateInfo.pColorBlendState = &blend;
pipelineCreateInfo.layout = pipelineLayout.get();
pipelineCreateInfo.renderPass = renderpass.get();
pipelineCreateInfo.subpass = 0;
pipelineCreateInfo.stageCount = 2;
pipelineCreateInfo.pStages = shaderStage;
vk::UniquePipeline pipeline = device->createGraphicsPipelineUnique(nullptr, pipelineCreateInfo).value;
vk::UniqueSwapchainKHR swapchain;
std::vector<vk::Image> swapchainImages;
std::vector<vk::UniqueImageView> swapchainImageViews;
std::vector<vk::UniqueFramebuffer> swapchainFramebufs;
auto recreateSwapchain = [&](){
swapchainFramebufs.clear();
swapchainImageViews.clear();
swapchainImages.clear();
swapchain.reset();
vk::SurfaceCapabilitiesKHR surfaceCapabilities = physicalDevice.getSurfaceCapabilitiesKHR(surface.get());
vk::SwapchainCreateInfoKHR swapchainCreateInfo;
swapchainCreateInfo.surface = surface.get();
swapchainCreateInfo.minImageCount = surfaceCapabilities.minImageCount + 1;
swapchainCreateInfo.imageFormat = swapchainFormat.format;
swapchainCreateInfo.imageColorSpace = swapchainFormat.colorSpace;
swapchainCreateInfo.imageExtent = surfaceCapabilities.currentExtent;
swapchainCreateInfo.imageArrayLayers = 1;
swapchainCreateInfo.imageUsage = vk::ImageUsageFlagBits::eColorAttachment;
swapchainCreateInfo.imageSharingMode = vk::SharingMode::eExclusive;
swapchainCreateInfo.preTransform = surfaceCapabilities.currentTransform;
swapchainCreateInfo.presentMode = swapchainPresentMode;
swapchainCreateInfo.clipped = VK_TRUE;
swapchain = device->createSwapchainKHRUnique(swapchainCreateInfo);
swapchainImages = device->getSwapchainImagesKHR(swapchain.get());
swapchainImageViews.resize(swapchainImages.size());
for (size_t i = 0; i < swapchainImages.size(); i++) {
vk::ImageViewCreateInfo imgViewCreateInfo;
imgViewCreateInfo.image = swapchainImages[i];
imgViewCreateInfo.viewType = vk::ImageViewType::e2D;
imgViewCreateInfo.format = swapchainFormat.format;
imgViewCreateInfo.components.r = vk::ComponentSwizzle::eIdentity;
imgViewCreateInfo.components.g = vk::ComponentSwizzle::eIdentity;
imgViewCreateInfo.components.b = vk::ComponentSwizzle::eIdentity;
imgViewCreateInfo.components.a = vk::ComponentSwizzle::eIdentity;
imgViewCreateInfo.subresourceRange.aspectMask = vk::ImageAspectFlagBits::eColor;
imgViewCreateInfo.subresourceRange.baseMipLevel = 0;
imgViewCreateInfo.subresourceRange.levelCount = 1;
imgViewCreateInfo.subresourceRange.baseArrayLayer = 0;
imgViewCreateInfo.subresourceRange.layerCount = 1;
swapchainImageViews[i] = device->createImageViewUnique(imgViewCreateInfo);
}
swapchainFramebufs.resize(swapchainImages.size());
for (size_t i = 0; i < swapchainImages.size(); i++) {
vk::ImageView frameBufAttachments[1];
frameBufAttachments[0] = swapchainImageViews[i].get();
vk::FramebufferCreateInfo frameBufCreateInfo;
frameBufCreateInfo.width = surfaceCapabilities.currentExtent.width;
frameBufCreateInfo.height = surfaceCapabilities.currentExtent.height;
frameBufCreateInfo.layers = 1;
frameBufCreateInfo.renderPass = renderpass.get();
frameBufCreateInfo.attachmentCount = 1;
frameBufCreateInfo.pAttachments = frameBufAttachments;
swapchainFramebufs[i] = device->createFramebufferUnique(frameBufCreateInfo);
}
};
recreateSwapchain();
vk::CommandPoolCreateInfo cmdPoolCreateInfo;
cmdPoolCreateInfo.queueFamilyIndex = graphicsQueueFamilyIndex;
cmdPoolCreateInfo.flags = vk::CommandPoolCreateFlagBits::eResetCommandBuffer;
vk::UniqueCommandPool cmdPool = device->createCommandPoolUnique(cmdPoolCreateInfo);
vk::CommandBufferAllocateInfo cmdBufAllocInfo;
cmdBufAllocInfo.commandPool = cmdPool.get();
cmdBufAllocInfo.commandBufferCount = 1;
cmdBufAllocInfo.level = vk::CommandBufferLevel::ePrimary;
std::vector<vk::UniqueCommandBuffer> cmdBufs =
device->allocateCommandBuffersUnique(cmdBufAllocInfo);
vk::SemaphoreCreateInfo semaphoreCreateInfo;
vk::UniqueSemaphore swapchainImgSemaphore, imgRenderedSemaphore;
swapchainImgSemaphore = device->createSemaphoreUnique(semaphoreCreateInfo);
imgRenderedSemaphore = device->createSemaphoreUnique(semaphoreCreateInfo);
vk::FenceCreateInfo fenceCreateInfo;
fenceCreateInfo.flags = vk::FenceCreateFlagBits::eSignaled;
vk::UniqueFence imgRenderedFence = device->createFenceUnique(fenceCreateInfo);
while (!glfwWindowShouldClose(window)) {
glfwPollEvents();
device->waitForFences({ imgRenderedFence.get()}, VK_TRUE, UINT64_MAX);
vk::ResultValue acquireImgResult = device->acquireNextImageKHR(swapchain.get(), 1'000'000'000, swapchainImgSemaphore.get());
if(acquireImgResult.result == vk::Result::eSuboptimalKHR || acquireImgResult.result == vk::Result::eErrorOutOfDateKHR) {
std::cerr << "スワップチェーンを再作成します。" << std::endl;
recreateSwapchain();
continue;
}
if (acquireImgResult.result != vk::Result::eSuccess) {
std::cerr << "次フレームの取得に失敗しました。" << std::endl;
return -1;
}
device->resetFences({ imgRenderedFence.get() });
uint32_t imgIndex = acquireImgResult.value;
cmdBufs[0]->reset();
vk::CommandBufferBeginInfo cmdBeginInfo;
cmdBufs[0]->begin(cmdBeginInfo);
vk::ClearValue clearVal[1];
clearVal[0].color.float32[0] = 0.0f;
clearVal[0].color.float32[1] = 0.0f;
clearVal[0].color.float32[2] = 0.0f;
clearVal[0].color.float32[3] = 1.0f;
vk::RenderPassBeginInfo renderpassBeginInfo;
renderpassBeginInfo.renderPass = renderpass.get();
renderpassBeginInfo.framebuffer = swapchainFramebufs[imgIndex].get();
renderpassBeginInfo.renderArea = vk::Rect2D({ 0,0 }, { screenWidth, screenHeight });
renderpassBeginInfo.clearValueCount = 1;
renderpassBeginInfo.pClearValues = clearVal;
cmdBufs[0]->beginRenderPass(renderpassBeginInfo, vk::SubpassContents::eInline);
cmdBufs[0]->bindPipeline(vk::PipelineBindPoint::eGraphics, pipeline.get());
cmdBufs[0]->bindVertexBuffers(0, { vertexBuf.get() }, { 0 });
cmdBufs[0]->draw(vertices.size(), 1, 0, 0);
cmdBufs[0]->endRenderPass();
cmdBufs[0]->end();
vk::CommandBuffer submitCmdBuf[1] = { cmdBufs[0].get() };
vk::SubmitInfo submitInfo;
submitInfo.commandBufferCount = 1;
submitInfo.pCommandBuffers = submitCmdBuf;
vk::Semaphore renderwaitSemaphores[] = { swapchainImgSemaphore.get() };
vk::PipelineStageFlags renderwaitStages[] = { vk::PipelineStageFlagBits::eColorAttachmentOutput };
submitInfo.waitSemaphoreCount = 1;
submitInfo.pWaitSemaphores = renderwaitSemaphores;
submitInfo.pWaitDstStageMask = renderwaitStages;
vk::Semaphore renderSignalSemaphores[] = { imgRenderedSemaphore.get() };
submitInfo.signalSemaphoreCount = 1;
submitInfo.pSignalSemaphores = renderSignalSemaphores;
graphicsQueue.submit({ submitInfo }, imgRenderedFence.get());
vk::PresentInfoKHR presentInfo;
auto presentSwapchains = { swapchain.get() };
auto imgIndices = { imgIndex };
presentInfo.swapchainCount = presentSwapchains.size();
presentInfo.pSwapchains = presentSwapchains.begin();
presentInfo.pImageIndices = imgIndices.begin();
vk::Semaphore presenWaitSemaphores[] = { imgRenderedSemaphore.get() };
presentInfo.waitSemaphoreCount = 1;
presentInfo.pWaitSemaphores = presenWaitSemaphores;
graphicsQueue.presentKHR(presentInfo);
}
graphicsQueue.waitIdle();
glfwTerminate();
return 0;
}
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) in vec2 inPos;
layout(location = 1) in vec3 inColor;
layout(location = 0) out vec3 fragmentColor;
void main() {
gl_Position = vec4(inPos, 0.0, 1.0);
fragmentColor = inColor;
}
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) in vec3 fragmentColor;
layout(location = 0) out vec4 outColor;
void main() {
outColor = vec4(fragmentColor, 1.0);
}
cmake_minimum_required(VERSION 3.22)
project(vulkan-test)
set(CMAKE_CXX_STANDARD 17)
add_executable(app main.cpp)
find_package(Vulkan REQUIRED)
target_include_directories(app PRIVATE ${Vulkan_INCLUDE_DIRS})
target_link_libraries(app PRIVATE ${Vulkan_LIBRARIES})
find_package(glfw3 CONFIG REQUIRED)
target_link_libraries(app PRIVATE glfw)
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