From a6501b5d7ad204c3b998c843c7ed68ef7be323ba Mon Sep 17 00:00:00 2001
From: gramanas <anastasis.gramm2@gmail.com>
Date: Wed, 5 Jun 2024 19:04:25 +0300
Subject: more vks, stupid mutlistep build, and imgui

---
 src/cplusplus.cpp | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 117 insertions(+), 1 deletion(-)

(limited to 'src/cplusplus.cpp')

diff --git a/src/cplusplus.cpp b/src/cplusplus.cpp
index 4441cc2..750a5bf 100644
--- a/src/cplusplus.cpp
+++ b/src/cplusplus.cpp
@@ -1,5 +1,121 @@
 // not needed yet -- add custom cpp functions first
-// #include "cplusplus.h"
+#include "cplusplus.h"
+#include "vksetup.h"
 
 #define VMA_IMPLEMENTATION
 #include "vk_mem_alloc.h"
+
+#include <imgui.h>
+#include <backends/imgui_impl_sdl2.h>
+#include <backends/imgui_impl_vulkan.h>
+
+static void check_vk_result(VkResult err)
+{
+  if (err == 0)
+    return;
+  fprintf(stderr, "[vulkan] Error: VkResult = %d\n", err);
+  if (err < 0)
+    abort();
+}
+
+void
+imgui_draw_cmd(VkCommandBuffer cmd)
+{
+  ImGui_ImplVulkan_RenderDrawData(ImGui::GetDrawData(), cmd);
+}
+
+void
+imgui_draw()
+{
+  ImGui::Render();
+}
+
+void
+imgui_new_frame(vks_context vk)
+{
+  
+  ImGui_ImplVulkan_NewFrame();
+  ImGui_ImplSDL2_NewFrame();
+
+  ImGui::NewFrame();
+
+  
+  ImGui::ShowDemoWindow();
+}
+
+
+bool
+imgui_proc_event(SDL_Event* e)
+{
+  return ImGui_ImplSDL2_ProcessEvent(e);
+}
+
+static VkDescriptorPool imguiPool;
+void
+init_imgui(vks_context vk)
+{
+  VkDescriptorPoolSize pool_sizes[] = {
+    { VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
+    { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 },
+    { VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 },
+    { VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 },
+    { VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 },
+    { VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 },
+    { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 },
+    { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 },
+    { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 },
+    { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 },
+    { VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 }
+  };
+
+  VkDescriptorPoolCreateInfo pool_info = {};
+  pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
+  pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
+  pool_info.maxSets = 1000;
+  pool_info.poolSizeCount = std::size(pool_sizes);
+  pool_info.pPoolSizes = pool_sizes;
+
+  VK_CHECK(vkCreateDescriptorPool(vk.device, &pool_info, nullptr, &imguiPool));
+  
+  IMGUI_CHECKVERSION();
+  ImGui::CreateContext();
+  ImGuiIO& io = ImGui::GetIO();
+  io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
+  io.ConfigFlags |=
+    ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
+
+  ImGui_ImplSDL2_InitForVulkan(vk.window);
+  ImGui_ImplVulkan_InitInfo init_info = {};
+  init_info.Instance = vk.instance;
+  init_info.PhysicalDevice = vk.physical_device;
+  init_info.Device = vk.device;
+  //init_info.QueueFamily = ;
+  init_info.Queue = vk.graphics_and_compute_queue;
+  //init_info.PipelineCache = YOUR_PIPELINE_CACHE;
+  init_info.DescriptorPool = imguiPool;
+  init_info.Subpass = 0;
+  init_info.MinImageCount = 2;
+  init_info.ImageCount = 2;
+  init_info.MSAASamples = vk.msaa_samples;
+  init_info.CheckVkResultFn           = check_vk_result;
+  init_info.UseDynamicRendering       = true;
+  //init_info.
+  init_info.PipelineRenderingCreateInfo.sType =
+    VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR;
+  init_info.PipelineRenderingCreateInfo.colorAttachmentCount    = 1;
+  init_info.PipelineRenderingCreateInfo.pColorAttachmentFormats = &vk.swapchain.image_format;
+  init_info.PipelineRenderingCreateInfo.depthAttachmentFormat   = findDepthFormat(vk);
+
+  ImGui_ImplVulkan_Init(&init_info);
+  // (this gets a bit more complicated, see example app for full reference)
+  ImGui_ImplVulkan_CreateFontsTexture();
+  // (your code submit a queue)
+  ImGui_ImplVulkan_DestroyFontsTexture();
+}
+
+void
+imgui_destroy(vks_context vk)
+{
+  ImGui_ImplVulkan_Shutdown();
+  vkDestroyDescriptorPool(vk.device, imguiPool, nullptr);
+}
-- 
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