test/main.cpp

@@ -11,11 +11,26 @@
 #include "camera.h"
 
 #include <iostream>
+#include <pthread.h>
+
+#ifdef __linux__
+#include <unistd.h>
+#endif
+#ifdef _WIN32
+#include <Windows.h>
+#endif
 
 void framebuffer_size_callback(GLFWwindow *window, int width, int height);
 void mouse_callback(GLFWwindow *window, double xpos, double ypos);
 void scroll_callback(GLFWwindow *window, double xoffset, double yoffset);
+void focus_callback(GLFWwindow *window, int focused);
 void processInput(GLFWwindow *window);
+void delay_fps(int fps, int render_time_us);
+void *getting_fps(void *window);
+
+bool running = true;
+bool pausing = false;
+bool just_dispaused = false;
 
 // settings
 const unsigned int SCR_WIDTH = 854;
@@ -31,6 +46,22 @@ bool firstMouse = true;
 float deltaTime = 0.0f; // time between current frame and last frame
 float lastFrame = 0.0f;
 
+// focuse controlling
+bool window_focused = false;
+
+// window managing
+int curr_width;
+int curr_height;
+int curr_x;
+int curr_y;
+
+// monitors controlling
+int monitor_count;
+GLFWmonitor **monitors;
+
+// fps control
+int fps;
+
 int main()
 {
     // std::cout << "debug";
@@ -40,6 +71,8 @@ int main()
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
     glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_FALSE);
+    glfwWindowHint(GLFW_SCALE_FRAMEBUFFER, GLFW_FALSE);
 #ifdef BLENDING
     glEnable(GL_BLEND);
 #endif
@@ -57,10 +90,17 @@ int main()
         glfwTerminate();
         return -1;
     }
+
+    monitors = glfwGetMonitors(&monitor_count);
+
+    pthread_t thr_getting_fps;
+    pthread_create(&thr_getting_fps, nullptr, getting_fps, window);
+
     glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
+    glfwSetWindowFocusCallback(window, focus_callback);
 
     // tell GLFW to capture our mouse
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
@@ -251,6 +291,8 @@ int main()
 
     glEnable(GL_DEPTH_TEST);
     glDepthFunc(GL_LESS);
+
+    // glfwSetCursorPos(window, curr_x + curr_width / 2, curr_y + curr_height / 2);
     //  render loop
     //  -----------
     while (!glfwWindowShouldClose(window))
@@ -321,8 +363,13 @@ int main()
         //  -------------------------------------------------------------------------------
         glfwSwapBuffers(window);
         glfwPollEvents();
+
+        float renderTime = static_cast<float>(glfwGetTime()) - lastFrame;
+        delay_fps(fps, (int)(renderTime * 1000 * 1000));
     }
 
+    running = false;
+
     glDisable(GL_DEPTH_TEST);
 
     // optional: de-allocate all resources once they've outlived their purpose:
@@ -338,10 +385,28 @@ int main()
 
 // process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
 // ---------------------------------------------------------------------------------------------------------
+bool ESC_KEY_PRESSED = false;
 void processInput(GLFWwindow *window)
 {
-    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
-        glfwSetWindowShouldClose(window, true);
+    int esc_key_evetype = glfwGetKey(window, GLFW_KEY_ESCAPE);
+    if (!ESC_KEY_PRESSED && esc_key_evetype == GLFW_PRESS)
+    {
+        ESC_KEY_PRESSED = true;
+        pausing = !pausing;
+        if (!pausing)
+            just_dispaused = true;
+        if (!pausing)
+            glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+        else
+            glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+    }
+    else if (esc_key_evetype == GLFW_RELEASE)
+    {
+        ESC_KEY_PRESSED = false;
+    }
+
+    if (pausing)
+        return;
 
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
@@ -356,7 +421,6 @@ void processInput(GLFWwindow *window)
         camera.ProcessKeyboard(UP, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS)
         camera.ProcessKeyboard(DOWN, deltaTime);
-
 }
 
 // glfw: whenever the window size changed (by OS or user resize) this callback function executes
@@ -365,16 +429,39 @@ void framebuffer_size_callback(GLFWwindow *window, int width, int height)
 {
     // make sure the viewport matches the new window dimensions; note that width and
     // height will be significantly larger than specified on retina displays.
-    glViewport(0, 0, width, height);
+    curr_width = width;
+    curr_height = height;
+    if ((double)width / height > (double)SCR_WIDTH / SCR_HEIGHT)
+    { // When profiled screen size rate less than new size
+        int vpwidth = width;
+        int vpheight = width * SCR_HEIGHT / SCR_WIDTH;
+        glViewport(0, -(vpheight - height) / 2, vpwidth, vpheight);
+    }
+    else
+    { // or more than
+        int vpheight = height;
+        int vpwidth = height * SCR_WIDTH / SCR_HEIGHT;
+        glViewport(-(vpwidth - width) / 2, 0, vpwidth, vpheight);
+    }
 }
 
 // glfw: whenever the mouse moves, this callback is called
 // -------------------------------------------------------
 void mouse_callback(GLFWwindow *window, double xposIn, double yposIn)
 {
+    if (pausing)
+        return;
+
     float xpos = static_cast<float>(xposIn);
     float ypos = static_cast<float>(yposIn);
 
+    if (just_dispaused)
+    {
+        lastX = xpos;
+        lastY = ypos;
+        just_dispaused = false;
+    }
+
     if (firstMouse)
     {
         lastX = xpos;
@@ -397,3 +484,66 @@ void scroll_callback(GLFWwindow *window, double xoffset, double yoffset)
 {
     camera.ProcessMouseScroll(static_cast<float>(yoffset));
 }
+
+void focus_callback(GLFWwindow *window, int focused)
+{
+    if (focused)
+    {
+        window_focused = true;
+    }
+    else
+    {
+        window_focused = false;
+        pausing = true;
+        glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+    }
+}
+
+void *getting_fps(void *_window)
+{
+    GLFWwindow *window = static_cast<GLFWwindow *>(_window);
+    while (running)
+    {
+        glfwGetWindowPos(window, &curr_x, &curr_y);
+        glfwGetWindowSize(window, &curr_width, &curr_height);
+        // get current monitor's scale
+        int on_which = -1;
+        GLFWvidmode *vmode;
+        for (int i = 0; i < monitor_count; i++)
+        {
+            int monx, mony;
+            glfwGetMonitorPos(monitors[i], &monx, &mony);
+            GLFWvidmode *mode = const_cast<GLFWvidmode *>(glfwGetVideoMode(monitors[i]));
+            if (curr_x >= monx && curr_x < mode->width && curr_y >= mony && curr_y < mode->height)
+            {
+                on_which = i;
+                vmode = mode;
+                break;
+            }
+        }
+        if (on_which != -1)
+        {
+            fps = vmode->refreshRate;
+        }
+#ifdef __linux__
+        usleep(1000);
+#endif
+#ifdef _WIN32
+        Sleep(1);
+#endif
+    }
+    std::cout << std::endl;
+    return nullptr;
+}
+
+void delay_fps(int fps, int render_time_us)
+{
+#ifdef __linux__
+    int del = 1000 * 1000 / fps;
+    usleep(del - render_time_us);
+#endif
+#ifdef _WIN32
+    int del = 1000 / fps;
+    Sleep(del - render_time_us / 1000);
+#endif
+}