wip: moving backend-related stuff out of the app logic

2026-04-09 12:37:41 +03:00 · 2025-12-18 16:45:49 +03:00
parent 292a748ac4
commit c68ca3dabe
8 changed files with 370 additions and 27 deletions
--- a/src/gui/backend/glfw_opengl.cpp
+++ b/src/gui/backend/glfw_opengl.cpp
@@ -0,0 +1,141 @@
+#include "gui/backend/glfw_opengl.hpp"
+#include <iostream>
+#include <GLFW/glfw3.h>
+#include <imgui.h>
+#include <imgui_impl_glfw.h>
+#include <imgui_impl_opengl3.h>
+
+namespace clrsync::gui::backend
+{
+
+glfw_opengl_backend::glfw_opengl_backend() = default;
+
+glfw_opengl_backend::~glfw_opengl_backend()
+{
+    glfw_opengl_backend::shutdown();
+}
+
+bool glfw_opengl_backend::initialize(const window_config &config)
+{
+    glfwSetErrorCallback([](int error, const char* description) {
+        std::cerr << "GLFW Error " << error << ": " << description << std::endl;
+    });
+    
+    if (!glfwInit())
+    {
+        std::cerr << "Failed to initialize GLFW" << std::endl;
+        return false;
+    }
+
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+#ifdef __APPLE__
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
+#else
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
+#endif
+    glfwWindowHint(GLFW_RESIZABLE, config.resizable ? GLFW_TRUE : GLFW_FALSE);
+    glfwWindowHint(GLFW_DECORATED, config.decorated ? GLFW_TRUE : GLFW_FALSE);
+    glfwWindowHint(GLFW_TRANSPARENT_FRAMEBUFFER, config.transparent_framebuffer ? GLFW_TRUE : GLFW_FALSE);
+
+    m_window = glfwCreateWindow(config.width, config.height, config.title.c_str(), nullptr, nullptr);
+    if (!m_window)
+    {
+        std::cerr << "Failed to create GLFW window" << std::endl;
+        glfwTerminate();
+        return false;
+    }
+
+    glfwMakeContextCurrent(m_window);
+    glfwSwapInterval(1);
+
+    return true;
+}
+
+void glfw_opengl_backend::shutdown()
+{
+    if (m_window)
+    {
+        glfwDestroyWindow(m_window);
+        m_window = nullptr;
+    }
+    glfwTerminate();
+}
+
+bool glfw_opengl_backend::should_close() const
+{
+    return m_window && glfwWindowShouldClose(m_window);
+}
+
+void glfw_opengl_backend::begin_frame()
+{
+    glfwPollEvents();
+    
+    if (m_window)
+    {
+        int display_w, display_h;
+        glfwGetFramebufferSize(m_window, &display_w, &display_h);
+        glViewport(0, 0, display_w, display_h);
+        glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+    }
+}
+
+void glfw_opengl_backend::end_frame()
+{
+    if (m_window)
+    {
+        glfwSwapBuffers(m_window);
+    }
+}
+
+void *glfw_opengl_backend::get_native_window() const
+{
+    return static_cast<void *>(m_window);
+}
+
+void *glfw_opengl_backend::get_graphics_context() const
+{
+    return static_cast<void *>(m_window);
+}
+
+bool glfw_opengl_backend::init_imgui_backend()
+{
+    if (!m_window)
+        return false;
+    
+    if (!ImGui_ImplGlfw_InitForOpenGL(m_window, true))
+        return false;
+    
+#ifdef __APPLE__
+    const char* glsl_version = "#version 150";
+#else
+    const char* glsl_version = "#version 120";
+#endif
+    
+    if (!ImGui_ImplOpenGL3_Init(glsl_version))
+    {
+        ImGui_ImplGlfw_Shutdown();
+        return false;
+    }
+    
+    return true;
+}
+
+void glfw_opengl_backend::shutdown_imgui_backend()
+{
+    ImGui_ImplOpenGL3_Shutdown();
+    ImGui_ImplGlfw_Shutdown();
+}
+
+void glfw_opengl_backend::imgui_new_frame()
+{
+    ImGui_ImplOpenGL3_NewFrame();
+    ImGui_ImplGlfw_NewFrame();
+}
+
+void glfw_opengl_backend::imgui_render_draw_data(void* draw_data)
+{
+    ImGui_ImplOpenGL3_RenderDrawData(static_cast<ImDrawData*>(draw_data));
+}
+
+} // namespace clrsync::gui::backend