HOLY FUCKING SHIT I GOT A TRIANGLE

src/main.cpp

@@ -56,17 +56,23 @@ class VulkanApp {
   vk::Queue mGraphicsQueue;
   vk::Queue mPresentQueue;
 
-  vk::UniqueSwapchainKHR           mSwapChain;
+  vk::UniqueSwapchainKHR             mSwapChain;
-  std::vector<vk::Image>           mSwapChainImages;
+  std::vector<vk::Image>             mSwapChainImages;
-  vk::Format                       mSwapChainImageFormat;
+  vk::Format                         mSwapChainImageFormat;
-  vk::Extent2D                     mSwapChainExtent;
+  vk::Extent2D                       mSwapChainExtent;
-  std::vector<vk::UniqueImageView> mSwapChainImageViews;
+  std::vector<vk::UniqueImageView>   mSwapChainImageViews;
+  std::vector<vk::UniqueFramebuffer> mSwapChainFramebuffers;
 
   vk::UniqueRenderPass     mRenderPass;
   vk::UniquePipelineLayout mPipelineLayout;
   vk::UniquePipeline       mGraphicsPipeline;
 
-  std::vector<vk::UniqueFramebuffer> mSwapChainFramebuffers;
+  vk::UniqueCommandPool   mCommandPool;
+  vk::UniqueCommandBuffer mCommandBuffer;
+
+  vk::UniqueSemaphore mImageAvailableSemaphore;
+  vk::UniqueSemaphore mRenderFinishedSemaphore;
+  vk::UniqueFence     mInFlightFence;
 
   struct QueueFamilyIndices {
     std::optional<u32> graphics_family;
@@ -120,10 +126,18 @@ class VulkanApp {
     createRenderPass();
     createGraphicsPipeline();
     createFramebuffers();
+    createCommandPool();
+    createCommandBuffer();
+    createSyncObjects();
   }
 
   fn mainLoop() -> void {
-    while (!mWindow->shouldClose()) { vkfw::waitEvents(); }
+    while (!mWindow->shouldClose()) {
+      vkfw::waitEvents();
+      drawFrame();
+    }
+
+    mDevice->waitIdle();
   }
 
   fn createInstance() -> void {
@@ -464,6 +478,123 @@ class VulkanApp {
     }
   }
 
+  fn createCommandPool() -> void {
+    QueueFamilyIndices queueFamilyIndices = findQueueFamilies(mPhysicalDevice);
+
+    vk::CommandPoolCreateInfo poolInfo {
+      .flags            = vk::CommandPoolCreateFlagBits::eResetCommandBuffer,
+      .queueFamilyIndex = queueFamilyIndices.graphics_family.value(),
+    };
+
+    mCommandPool = mDevice->createCommandPoolUnique(poolInfo);
+  }
+
+  fn createCommandBuffer() -> void {
+    vk::CommandBufferAllocateInfo allocInfo {
+      .commandPool        = mCommandPool.get(),
+      .level              = vk::CommandBufferLevel::ePrimary,
+      .commandBufferCount = 1,
+    };
+
+    mCommandBuffer = std::move(mDevice->allocateCommandBuffersUnique(allocInfo)[0]);
+  }
+
+  fn recordCommandBuffer(vk::CommandBuffer commandBuffer, u32 imageIndex) -> void {
+    // might break
+    vk::CommandBufferBeginInfo beginInfo {};
+
+    commandBuffer.begin(beginInfo);
+
+    vk::ClearValue clearColor { { std::array<float, 4> { 0.0F, 0.0F, 0.0F, 1.0F } } };
+
+    vk::RenderPassBeginInfo renderPassInfo {
+      .renderPass      = mRenderPass.get(),
+      .framebuffer     = mSwapChainFramebuffers[imageIndex].get(),
+      .renderArea      = { .offset = { 0, 0 }, .extent = mSwapChainExtent },
+      .clearValueCount = 1,
+      .pClearValues    = &clearColor,
+    };
+
+    commandBuffer.beginRenderPass(renderPassInfo, vk::SubpassContents::eInline);
+
+    commandBuffer.bindPipeline(vk::PipelineBindPoint::eGraphics, mGraphicsPipeline.get());
+
+    vk::Viewport viewport {
+      .x        = 0.0F,
+      .y        = 0.0F,
+      .width    = static_cast<f32>(mSwapChainExtent.width),
+      .height   = static_cast<f32>(mSwapChainExtent.height),
+      .minDepth = 0.0F,
+      .maxDepth = 1.0F,
+    };
+
+    commandBuffer.setViewport(0, viewport);
+
+    vk::Rect2D scissor {
+      .offset = { 0, 0 },
+      .extent = mSwapChainExtent,
+    };
+
+    commandBuffer.setScissor(0, scissor);
+
+    commandBuffer.draw(3, 1, 0, 0);
+
+    commandBuffer.endRenderPass();
+
+    commandBuffer.end();
+  }
+
+  fn createSyncObjects() -> void {
+    vk::SemaphoreCreateInfo semaphoreInfo {};
+    vk::FenceCreateInfo     fenceInfo { .flags = vk::FenceCreateFlagBits::eSignaled };
+
+    mImageAvailableSemaphore = mDevice->createSemaphoreUnique(semaphoreInfo);
+    mRenderFinishedSemaphore = mDevice->createSemaphoreUnique(semaphoreInfo);
+    mInFlightFence           = mDevice->createFenceUnique(fenceInfo);
+  }
+
+  fn drawFrame() -> void {
+    vk::Result result = mDevice->waitForFences(mInFlightFence.get(), vk::Bool32(vk::True), UINT64_MAX);
+
+    if (result != vk::Result::eSuccess)
+      throw std::runtime_error("Failed to wait for fences!");
+
+    mDevice->resetFences(mInFlightFence.get());
+
+    u32 imageIndex =
+      mDevice->acquireNextImageKHR(mSwapChain.get(), UINT64_MAX, mImageAvailableSemaphore.get(), nullptr)
+        .value;
+
+    mCommandBuffer->reset(vk::CommandBufferResetFlagBits::eReleaseResources);
+    recordCommandBuffer(mCommandBuffer.get(), imageIndex);
+
+    std::array<vk::PipelineStageFlags, 1> waitStages = { vk::PipelineStageFlagBits::eColorAttachmentOutput };
+
+    vk::SubmitInfo submitInfo {
+      .waitSemaphoreCount   = 1,
+      .pWaitSemaphores      = &mImageAvailableSemaphore.get(),
+      .pWaitDstStageMask    = waitStages.data(),
+      .commandBufferCount   = 1,
+      .pCommandBuffers      = &mCommandBuffer.get(),
+      .signalSemaphoreCount = 1,
+      .pSignalSemaphores    = &mRenderFinishedSemaphore.get(),
+    };
+
+    mGraphicsQueue.submit(submitInfo, mInFlightFence.get());
+
+    vk::PresentInfoKHR presentInfo {
+      .waitSemaphoreCount = 1,
+      .pWaitSemaphores    = &mRenderFinishedSemaphore.get(),
+      .swapchainCount     = 1,
+      .pSwapchains        = &mSwapChain.get(),
+      .pImageIndices      = &imageIndex,
+    };
+
+    vk::Result presentResult = mPresentQueue.presentKHR(presentInfo);
+    if (presentResult != vk::Result::eSuccess)
+      throw std::runtime_error("Failed to present swap chain image!");
+  }
+
   fn createShaderModule(const std::vector<char>& code) -> vk::UniqueShaderModule {
     vk::ShaderModuleCreateInfo createInfo { .codeSize = code.size(),
                                             .pCode    = std::bit_cast<const u32*>(code.data()) };