imguilibrary.cc

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#include "window/imguilibrary.h"
 
#include <cstdint>
 
#include "imgui/imgui.h"
#include "imgui_impl_sdl.h"
#include "imgui_impl_opengl3.h"
 
#include "font_material_icons.h"
#include "font_noto_sans_display.h"
 
#include "log/log.h"
 
#include "window/sdlglcontext.h"
#include "window/imgui_icons.h"
#include "window/imguizmo.h"
 
 
namespace eu::window::imgui
{
    void
    add_fork_awesome()
    {
        ImGuiIO &io = ImGui::GetIO();
 
        // io.Fonts->AddFontDefault();
        io.Fonts->AddFontFromMemoryCompressedTTF
        (
            NotoSansDisplay_compressed_data,
            NotoSansDisplay_compressed_size,
            16
        );
 
        const uint64_t min_mdi = ICON_MIN_MD;
        const uint64_t max_mdi = ICON_MAX_MD;
        constexpr const auto min_imgui = static_cast<uint64_t>(std::numeric_limits<ImWchar>::min());
        constexpr const auto max_imgui = static_cast<uint64_t>(std::numeric_limits<ImWchar>::max());
        const auto max_arg = static_cast<ImWchar>(std::min(max_mdi, max_imgui));
        if constexpr (max_mdi > max_imgui)
        {
            LOG_ERROR("imgui is missing {0} icons!", (max_mdi - max_imgui));
 
            LOG_INFO("mdi range: {0}", (max_mdi - min_mdi));
            LOG_INFO("imgui range: {0}", (max_imgui - min_imgui));
            LOG_INFO("Supplied range: {0}", (max_arg - min_mdi));
        }
 
 
        static const ImWchar icons_ranges[] = {ICON_MIN_MD, max_arg, 0};
        ImFontConfig icons_config;
        icons_config.MergeMode = true;
        icons_config.PixelSnapH = true;
        icons_config.GlyphMinAdvanceX = 13.0f;
 
        io.Fonts->AddFontFromMemoryCompressedTTF
        (
            MaterialIcons_compressed_data,
            MaterialIcons_compressed_size,
            13.0f,
            &icons_config,
            icons_ranges
        );
    }
 
 
    Library::Library(SDL_Window *the_window, SdlOpenglContext *context, const std::string &the_path)
            : path_to_imgui_ini(the_path + "imgui.ini")
    {
        // hrm... euphoria is using #version 330 core
        // todo(Gustav): look into this...
#if __APPLE__
        // GL 3.2 Core + GLSL 150
        const char* glsl_version = "#version 150";
#else
        // GL 3.0 + GLSL 130
        const char *glsl_version = "#version 130";
#endif
        IMGUI_CHECKVERSION();
        ImGui::CreateContext();
 
        ImGui_ImplSDL2_InitForOpenGL(the_window, context->context);
        ImGui_ImplOpenGL3_Init(glsl_version);
        imgui::guizmo::setup();
 
        add_fork_awesome();
 
        ImGui::GetIO().IniFilename = path_to_imgui_ini.c_str();
    }
 
    Library::~Library()
    {
        ImGui_ImplOpenGL3_Shutdown();
        ImGui_ImplSDL2_Shutdown();
        ImGui::DestroyContext();
    }
 
    void
    send_events_to_imgui(const SDL_Event* event)
    {
        ImGui_ImplSDL2_ProcessEvent(event);
    }
 
    void
    begin_new_frame()
    {
        ImGui_ImplOpenGL3_NewFrame();
        ImGui_ImplSDL2_NewFrame();
        ImGui::NewFrame();
        imgui::guizmo::begin();
    }
 
    void
    imgui_render()
    {
        // ImGui::ShowTestWindow();
        ImGui::Render();
        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
    }
 
}