122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
#include "GUIFrontend.h"
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#include <SDL.h>
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#include <SDL_opengl.h>
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#include <imgui.h>
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#include <backends/imgui_impl_sdl2.h>
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#include <backends/imgui_impl_opengl3.h>
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#include "Editor.h"
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#include "Command.h"
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static const char *kGlslVersion = "#version 150"; // GL 3.2 core (macOS compatible)
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bool GUIFrontend::Init(Editor &ed)
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{
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if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0) {
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return false;
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}
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// GL attributes for core profile
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
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SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
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SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
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SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
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window_ = SDL_CreateWindow(
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"kte",
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SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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width_, height_,
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SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
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if (!window_) return false;
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gl_ctx_ = SDL_GL_CreateContext(window_);
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if (!gl_ctx_) return false;
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SDL_GL_MakeCurrent(window_, gl_ctx_);
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SDL_GL_SetSwapInterval(1); // vsync
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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ImGuiIO &io = ImGui::GetIO(); (void)io;
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ImGui::StyleColorsDark();
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if (!ImGui_ImplSDL2_InitForOpenGL(window_, gl_ctx_)) return false;
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if (!ImGui_ImplOpenGL3_Init(kGlslVersion)) return false;
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// Initialize editor reported dimensions to pixels for now
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int w, h; SDL_GetWindowSize(window_, &w, &h);
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width_ = w; height_ = h;
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ed.SetDimensions(static_cast<std::size_t>(height_), static_cast<std::size_t>(width_));
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return true;
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}
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void GUIFrontend::Step(Editor &ed, bool &running)
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{
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SDL_Event e;
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while (SDL_PollEvent(&e)) {
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ImGui_ImplSDL2_ProcessEvent(&e);
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switch (e.type) {
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case SDL_QUIT:
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running = false;
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break;
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case SDL_WINDOWEVENT:
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if (e.window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
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width_ = e.window.data1;
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height_ = e.window.data2;
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ed.SetDimensions(static_cast<std::size_t>(height_), static_cast<std::size_t>(width_));
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}
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break;
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default:
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break;
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}
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// Map input to commands
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input_.ProcessSDLEvent(e);
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}
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// Execute pending mapped inputs (drain queue)
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for (;;) {
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MappedInput mi;
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if (!input_.Poll(mi)) break;
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if (mi.hasCommand) {
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Execute(ed, mi.id, mi.arg, mi.count);
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if (mi.id == CommandId::Quit || mi.id == CommandId::SaveAndQuit) {
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running = false;
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}
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}
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}
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// Start a new ImGui frame
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ImGui_ImplOpenGL3_NewFrame();
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ImGui_ImplSDL2_NewFrame(window_);
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ImGui::NewFrame();
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// Draw editor UI
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renderer_.Draw(ed);
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// Render
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ImGui::Render();
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int display_w, display_h;
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SDL_GL_GetDrawableSize(window_, &display_w, &display_h);
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glViewport(0, 0, display_w, display_h);
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glClearColor(0.1f, 0.1f, 0.11f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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SDL_GL_SwapWindow(window_);
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}
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void GUIFrontend::Shutdown()
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{
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ImGui_ImplOpenGL3_Shutdown();
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ImGui_ImplSDL2_Shutdown();
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ImGui::DestroyContext();
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if (gl_ctx_) { SDL_GL_DeleteContext(gl_ctx_); gl_ctx_ = nullptr; }
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if (window_) { SDL_DestroyWindow(window_); window_ = nullptr; }
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SDL_Quit();
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}
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