ImGui.hpp

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#pragma once
#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS
#define IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DISABLE_DEFAULT_ALLOCATORS
#include <imgui.h>
 
#include <RHICore/Device.hpp>
#include <RenderCore/Renderer.hpp>
#include <Rendering/TexturePool.hpp>
 
enum ImGui_ImplFoundation_ImageSampler
{
    ImGuiImplFoundationImageSamplerLinear = 0,
    ImGuiImplFoundationImageSamplerNearest = 1
};
// Upper half of ImTextureID stores metadata (i.e. sampler)
static_assert(sizeof(ImTextureID) == 2 * sizeof(Foundation::Rendering::TexturePoolHandle));
 
/* -- Internals -- */
void ImGui_ImplFoundation_ImplUpdateTexture(ImTextureData* tex);
void ImGui_ImplFoundation_ImplPassSetup(Foundation::RenderCore::PassHandle self,
                                        Foundation::RenderCore::Renderer* renderer,
                                        Foundation::RenderCore::ResourceHandle vtxBuffer,
                                        Foundation::RenderCore::ResourceHandle idxBuffer,
                                        Foundation::RenderCore::ResourceHandle linSampler,
                                        Foundation::RenderCore::ResourceHandle nearSampler);
void ImGui_ImplFoundation_ImplPassRecord(Foundation::RenderCore::PassHandle self,
                                         Foundation::RenderCore::Renderer* renderer, bool clear,
                                         Foundation::RHI::RHICommandList* cmd,
                                         Foundation::RenderCore::ResourceHandle vtxBuffer,
                                         Foundation::RenderCore::ResourceHandle idxBuffer);
void ImGui_ImplFoundation_ImplCreateResources(Foundation::RenderCore::Renderer* renderer,
                                              Foundation::RenderCore::ResourceHandle& outVtxBuffer,
                                              Foundation::RenderCore::ResourceHandle& outIdxBuffer,
                                              Foundation::RenderCore::ResourceHandle& outLinearSampler,
                                              Foundation::RenderCore::ResourceHandle& outNearestSampler);
// ^^^ Internals
 
/* -- APIs -- */
void ImGui_ImplFoundation_Init(Foundation::RHI::RHIDevice* device, Foundation::Native::NativeWindow* window, Foundation::Core::Allocator* allocator);
 
void ImGui_ImplFoundation_NewFrame();
 
void ImGui_ImplFoundation_Shutdown();
 
ImTextureID ImGui_ImplFoundation_AddImage(Foundation::RHI::RHITextureView* textureView,
                              ImGui_ImplFoundation_ImageSampler sampler = ImGuiImplFoundationImageSamplerLinear);
 
void ImGui_ImplFoundation_RemoveImage(ImTextureID textureID);
 
template <typename FSetup>
auto* ImGui_ImplFoundation_CreatePass(Foundation::RenderCore::Renderer* renderer, Foundation::Core::StringView name,
                                      bool clear, FSetup&& setup)
{
    using namespace Foundation;
    using namespace RenderCore;
    using namespace RHI;
    ResourceHandle vtxBuffer, idxBuffer, linSampler, nearSampler;
    ImGui_ImplFoundation_ImplCreateResources(renderer, vtxBuffer, idxBuffer, linSampler, nearSampler);
    return createPass(
        renderer, name, RHIDeviceQueueType::Graphics,
        [=](PassHandle self, Renderer* r)
        {
            ImGui_ImplFoundation_ImplPassSetup(self, r, vtxBuffer, idxBuffer, linSampler, nearSampler);
            setup(self, r);
        },
        [=](PassHandle self, Renderer* r, RHICommandList* cmd)
        { ImGui_ImplFoundation_ImplPassRecord(self, r, clear, cmd, vtxBuffer, idxBuffer); });
}
 
inline auto* ImGui_ImplFoundation_CreatePass(Foundation::RenderCore::Renderer* renderer,
                                             Foundation::Core::StringView name, bool clear = true)
{
    return ImGui_ImplFoundation_CreatePass(renderer, name, clear, Foundation::RenderCore::FSetupDefault{});
}
 
void ImGui_ImplFoundation_SetupContextWithDefaultStyles();
// ^^^ APIs