Add imgui

destrum/include/destrum/App.h

@@ -9,6 +9,8 @@
 
 #include <destrum/Graphics/GfxDevice.h>
 #include <destrum/Graphics/Renderer.h>
+#include <destrum/Graphics/Pipelines/ImguiPass.h>
+
 #include <destrum/Input/InputManager.h>
 
 
@@ -40,6 +42,7 @@ protected:
     AppParams m_params{};
 
     GfxDevice gfxDevice;
+    ImguiPass imguiPass;
 
     Camera camera{glm::vec3(0.f, 0.f, -5.f), glm::vec3(0, 1, 0)};
 

destrum/include/destrum/Graphics/GfxDevice.h

@@ -27,6 +27,8 @@
 #include "Util.h"
 
 class MeshCache;
+class ImguiPass;
+
 
 namespace {
     using ImmediateExecuteFunction = std::function<void(VkCommandBuffer)>;
@@ -54,6 +56,7 @@ public:
     struct EndFrameProps {
         const VkClearColorValue clearColor{{0.f, 0.f, 0.f, 1.f}};
         glm::ivec4 drawImageBlitRect{}; // where to blit draw image to
+        ImguiPass* imguiPass = nullptr;
     };
 
     void endFrame(VkCommandBuffer cmd, const GPUImage& drawImage, const EndFrameProps& props);
@@ -110,6 +113,19 @@ public:
 
     [[nodiscard]] ImageID getWhiteTextureID() const { return whiteImageId; }
 
+    VkInstance getVkInstance() const { return instance; }
+    VkPhysicalDevice getVkPhysicalDevice() const { return physicalDevice; }
+    VkDevice getVkDevice() const { return device; }
+
+    std::uint32_t getGraphicsQueueFamily() const { return graphicsQueueFamily; }
+    VkQueue getGraphicsQueue() const { return graphicsQueue; }
+
+    VkFormat getSwapchainFormat() const { return swapchainFormat; }
+    std::uint32_t getSwapchainImageCount() const { return swapchain.getImageCount(); }
+    VkImageView getSwapchainImageView(std::uint32_t imageIndex) const {
+        return swapchain.getImageView(imageIndex);
+    }
+
 private:
     vkb::Instance instance;
     vkb::PhysicalDevice physicalDevice;

destrum/include/destrum/Graphics/Pipelines/ImguiPass.h

@@ -0,0 +1,55 @@
+#ifndef DESTRUM_IMGUI_PASS_H
+#define DESTRUM_IMGUI_PASS_H
+
+#include <vulkan/vulkan.h>
+#include <SDL.h>
+
+class GfxDevice;
+
+class ImguiPass {
+public:
+    ImguiPass() = default;
+    ImguiPass(const ImguiPass&) = delete;
+    ImguiPass& operator=(const ImguiPass&) = delete;
+
+    void init(SDL_Window* window, GfxDevice& gfxDevice);
+    void handleEvent(const SDL_Event& event);
+
+    void beginFrame();
+    void endFrame();
+
+    void render(
+        VkCommandBuffer cmd,
+        VkImage targetImage,
+        VkImageView targetImageView,
+        VkImageLayout& targetImageLayout,
+        VkExtent2D targetExtent
+    );
+
+    void onSwapchainRecreated();
+    void cleanup();
+
+    [[nodiscard]] bool isInitialized() const { return initialized; }
+    [[nodiscard]] bool wantsMouse() const;
+    [[nodiscard]] bool wantsKeyboard() const;
+
+private:
+    void transitionToColorAttachment(
+        VkCommandBuffer cmd,
+        VkImage image,
+        VkImageLayout oldLayout,
+        VkImageLayout newLayout
+    ) const;
+
+private:
+    GfxDevice* gfx = nullptr;
+    SDL_Window* sdlWindow = nullptr;
+
+    VkDescriptorPool descriptorPool = VK_NULL_HANDLE;
+    VkFormat colorFormat = VK_FORMAT_UNDEFINED;
+
+    bool initialized = false;
+    bool frameBegun = false;
+};
+
+#endif // DESTRUM_IMGUI_PASS_H

destrum/include/destrum/Graphics/Swapchain.h

@@ -35,6 +35,11 @@ public:
 
     [[nodiscard]] VkImageView getImageView(int index) const { return imageViews[index]; }
 
+
+    VkImageView getImageView(std::uint32_t imageIndex) const {
+        return imageViews.at(imageIndex);
+    }
+
 private:
     struct FrameData {
         VkSemaphore swapchainSemaphore;