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https://github.com/mitch030504/Wiicompiled_VR_Frame.git
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#include "imgui.hpp"
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#include <cstddef>
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#include <cmath>
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#include <filesystem>
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#include <string>
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#include <vector>
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#include <webgpu/webgpu_cpp.h>
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#include <SDL3/SDL_events.h>
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#include <SDL3/SDL_render.h>
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#include "internal.hpp"
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#include "webgpu/gpu.hpp"
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#include "window.hpp"
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#define IMGUI_IMPL_WEBGPU_BACKEND_DAWN
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#include "backends/imgui_impl_sdl3.h"
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#include "backends/imgui_impl_sdlrenderer3.h"
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#include "backends/imgui_impl_wgpu.h"
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#include "tracy/Tracy.hpp"
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namespace aurora::imgui {
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static float g_scale;
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static std::string g_imguiLog{};
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static bool g_useSdlRenderer = false;
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// Set once ImGui::Render() has produced this frame's draw data. Interpolation encodes up to four
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// ImGui passes per frame, and every one of them used to rebuild the draw lists from scratch.
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static bool g_frameDataBuilt = false;
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static std::vector<SDL_Texture*> g_sdlTextures;
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static std::vector<wgpu::Texture> g_wgpuTextures;
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void remove_legacy_ini_file(const char* basePath) noexcept {
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if (basePath == nullptr || *basePath == '\0') {
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return;
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}
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std::error_code ec;
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std::filesystem::remove(std::filesystem::path{basePath} / "imgui.ini", ec);
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}
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void create_context() noexcept {
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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ImGuiIO& io = ImGui::GetIO();
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io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;
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remove_legacy_ini_file(g_config.userPath);
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remove_legacy_ini_file(g_config.cachePath);
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g_imguiLog = std::string{g_config.cachePath} + "/imgui.log";
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io.IniFilename = nullptr;
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io.LogFilename = g_imguiLog.c_str();
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ImGui::LoadIniSettingsFromMemory("", 0);
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io.WantSaveIniSettings = false;
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}
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void initialize() noexcept {
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ZoneScoped;
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SDL_Renderer* renderer = window::get_sdl_renderer();
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ImGui_ImplSDL3_InitForSDLRenderer(window::get_sdl_window(), renderer);
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g_useSdlRenderer = renderer != nullptr;
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if (g_useSdlRenderer) {
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ImGui_ImplSDLRenderer3_Init(renderer);
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} else {
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ImGui_ImplWGPU_InitInfo info;
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info.Device = webgpu::g_device.Get();
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info.RenderTargetFormat = static_cast<WGPUTextureFormat>(webgpu::g_graphicsConfig.surfaceConfiguration.format);
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// Interpolation records up to four ImGui passes in one command buffer, so keep three logical
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// frames of renderer resources to stop them overwriting each other's vertex/index buffers.
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info.NumFramesInFlight = 12;
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ImGui_ImplWGPU_Init(&info);
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}
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}
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void shutdown() noexcept {
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ZoneScoped;
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if (g_useSdlRenderer) {
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ImGui_ImplSDLRenderer3_Shutdown();
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} else {
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ImGui_ImplWGPU_Shutdown();
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}
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ImGui_ImplSDL3_Shutdown();
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ImGui::DestroyContext();
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for (const auto& texture : g_sdlTextures) {
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SDL_DestroyTexture(texture);
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}
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g_sdlTextures.clear();
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g_wgpuTextures.clear();
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}
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void process_event(const SDL_Event& event) noexcept {
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auto renderEvent = event;
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if (g_useSdlRenderer) {
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if (SDL_Renderer* renderer = window::get_sdl_renderer()) {
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SDL_ConvertEventToRenderCoordinates(renderer, &renderEvent);
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}
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}
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ImGui_ImplSDL3_ProcessEvent(&renderEvent);
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}
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bool wants_capture_event(const SDL_Event& event) noexcept {
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if (ImGui::GetCurrentContext() == nullptr) {
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return false;
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}
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const ImGuiIO& io = ImGui::GetIO();
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switch (event.type) {
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case SDL_EVENT_MOUSE_MOTION:
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case SDL_EVENT_MOUSE_BUTTON_DOWN:
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case SDL_EVENT_MOUSE_BUTTON_UP:
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case SDL_EVENT_MOUSE_WHEEL:
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case SDL_EVENT_FINGER_DOWN:
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case SDL_EVENT_FINGER_MOTION:
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case SDL_EVENT_FINGER_UP:
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case SDL_EVENT_FINGER_CANCELED:
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return io.WantCaptureMouse;
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case SDL_EVENT_KEY_DOWN:
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case SDL_EVENT_KEY_UP:
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case SDL_EVENT_TEXT_INPUT:
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return io.WantCaptureKeyboard || io.WantTextInput;
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default:
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return false;
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}
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}
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void new_frame(const AuroraWindowSize& size) noexcept {
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ZoneScoped;
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ImVec2 framebufferScale{
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size.width > 0 ? static_cast<float>(size.native_fb_width) / static_cast<float>(size.width) : 1.0f,
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size.height > 0 ? static_cast<float>(size.native_fb_height) / static_cast<float>(size.height) : 1.0f,
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};
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ImVec2 displaySize{static_cast<float>(size.width), static_cast<float>(size.height)};
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if (g_useSdlRenderer) {
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if (SDL_Renderer* renderer = window::get_sdl_renderer()) {
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float renderScaleX = 1.0f;
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float renderScaleY = 1.0f;
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SDL_GetRenderScale(renderer, &renderScaleX, &renderScaleY);
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if (renderScaleX > 0.0f && renderScaleY > 0.0f &&
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(std::fabs(renderScaleX - 1.0f) > 0.0001f || std::fabs(renderScaleY - 1.0f) > 0.0001f)) {
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int outputWidth = static_cast<int>(size.native_fb_width);
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int outputHeight = static_cast<int>(size.native_fb_height);
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SDL_GetRenderOutputSize(renderer, &outputWidth, &outputHeight);
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displaySize = {
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static_cast<float>(outputWidth) / renderScaleX,
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static_cast<float>(outputHeight) / renderScaleY,
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};
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framebufferScale = {renderScaleX, renderScaleY};
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}
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}
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ImGui_ImplSDLRenderer3_NewFrame();
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g_scale = size.scale;
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} else {
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if (g_scale != size.scale) {
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if (g_scale > 0.f) {
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ImGui_ImplWGPU_CreateDeviceObjects();
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}
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g_scale = size.scale;
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}
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if (!ImGui::GetIO().Fonts->IsBuilt()) {
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ImGui_ImplWGPU_CreateDeviceObjects();
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}
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ImGui_ImplWGPU_NewFrame();
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}
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ImGui_ImplSDL3_NewFrame();
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ImGuiIO& io = ImGui::GetIO();
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io.DisplayFramebufferScale = framebufferScale;
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ImGui::GetIO().DisplaySize = displaySize;
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ImGui::NewFrame();
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g_frameDataBuilt = false;
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}
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void render_frame_data() noexcept {
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ZoneScoped;
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if (g_frameDataBuilt) {
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return;
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}
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ImGui::Render();
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auto* data = ImGui::GetDrawData();
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data->FramebufferScale = ImGui::GetIO().DisplayFramebufferScale;
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g_frameDataBuilt = true;
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}
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void render(const wgpu::RenderPassEncoder& pass) noexcept {
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ZoneScoped;
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render_frame_data();
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auto* data = ImGui::GetDrawData();
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if (g_useSdlRenderer) {
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SDL_Renderer* renderer = window::get_sdl_renderer();
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SDL_RenderClear(renderer);
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ImGui_ImplSDLRenderer3_RenderDrawData(data, renderer);
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SDL_RenderPresent(renderer);
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} else {
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pass.PushDebugGroup("Aurora: Dear Imgui");
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ImGui_ImplWGPU_RenderDrawData(data, pass.Get());
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pass.PopDebugGroup();
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}
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}
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ImTextureID add_texture(uint32_t width, uint32_t height, const uint8_t* data) noexcept {
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if (SDL_Renderer* renderer = window::get_sdl_renderer()) {
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SDL_Texture* texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA32, SDL_TEXTUREACCESS_STATIC, width, height);
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SDL_UpdateTexture(texture, nullptr, data, width * 4);
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SDL_SetTextureScaleMode(texture, SDL_SCALEMODE_LINEAR);
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g_sdlTextures.push_back(texture);
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return reinterpret_cast<ImTextureID>(texture);
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}
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const wgpu::Extent3D size{
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.width = width,
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.height = height,
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.depthOrArrayLayers = 1,
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};
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const wgpu::TextureDescriptor textureDescriptor{
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.label = "imgui texture",
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.usage = wgpu::TextureUsage::TextureBinding | wgpu::TextureUsage::CopyDst,
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.dimension = wgpu::TextureDimension::e2D,
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.size = size,
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.format = wgpu::TextureFormat::RGBA8Unorm,
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.mipLevelCount = 1,
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.sampleCount = 1,
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};
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const wgpu::TextureViewDescriptor textureViewDescriptor{
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.label = "imgui texture view",
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.format = wgpu::TextureFormat::RGBA8Unorm,
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.dimension = wgpu::TextureViewDimension::e2D,
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.mipLevelCount = WGPU_MIP_LEVEL_COUNT_UNDEFINED,
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.arrayLayerCount = WGPU_ARRAY_LAYER_COUNT_UNDEFINED,
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};
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auto texture = webgpu::g_device.CreateTexture(&textureDescriptor);
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auto textureView = texture.CreateView(&textureViewDescriptor);
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{
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const wgpu::TexelCopyTextureInfo dstView{
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.texture = texture,
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};
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const wgpu::TexelCopyBufferLayout dataLayout{
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.bytesPerRow = 4 * width,
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.rowsPerImage = height,
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};
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webgpu::g_queue.WriteTexture(&dstView, data, width * height * 4, &dataLayout, &size);
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}
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g_wgpuTextures.push_back(texture);
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return reinterpret_cast<ImTextureID>(textureView.MoveToCHandle());
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}
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} // namespace aurora::imgui
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// C bindings
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extern "C" {
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ImTextureID aurora_imgui_add_texture(uint32_t width, uint32_t height, const void* rgba8) {
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return aurora::imgui::add_texture(width, height, static_cast<const uint8_t*>(rgba8));
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}
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}
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