#include #include #include #include #include void Init(void); void Shut_Down(int return_code); void Iteration(void); void Draw_Square(float red, float green, float blue); void Draw(void); void OnKeyPressed( int key, int action ); void OnCharPressed( int character, int action ); char* GetKeyName(int key); char* GetParamName(int param); int OnClose(); void OnResize( int width, int height ); void OnRefresh(); void OnMouseClick( int button, int action ); void OnMouseMove( int x, int y ); void OnMouseWheel( int pos ); void PullInfo(); int params[] = {GLFW_OPENED, GLFW_ACTIVE, GLFW_ICONIFIED, GLFW_ACCELERATED, GLFW_RED_BITS, GLFW_GREEN_BITS, GLFW_BLUE_BITS, GLFW_ALPHA_BITS, GLFW_DEPTH_BITS, GLFW_STENCIL_BITS, GLFW_REFRESH_RATE, GLFW_ACCUM_RED_BITS, GLFW_ACCUM_GREEN_BITS, GLFW_ACCUM_BLUE_BITS, GLFW_ACCUM_ALPHA_BITS, GLFW_AUX_BUFFERS, GLFW_STEREO, GLFW_WINDOW_NO_RESIZE, GLFW_FSAA_SAMPLES, GLFW_OPENGL_VERSION_MAJOR, GLFW_OPENGL_VERSION_MINOR, GLFW_OPENGL_FORWARD_COMPAT, GLFW_OPENGL_DEBUG_CONTEXT, GLFW_OPENGL_PROFILE}; unsigned int nb_params = sizeof(params) / sizeof(int); int features[] = {GLFW_MOUSE_CURSOR, GLFW_STICKY_KEYS, GLFW_STICKY_MOUSE_BUTTONS, GLFW_SYSTEM_KEYS, GLFW_KEY_REPEAT, GLFW_AUTO_POLL_EVENTS}; unsigned int nb_features = sizeof(features) / sizeof(int); float rotate_y = 0, rotate_z = 0; const float rotations_per_tick = .2; // the time of the previous frame double old_time; int main(void) { Init(); old_time = glfwGetTime(); emscripten_set_main_loop (Iteration, 0, 1); Shut_Down(0); } void Init() { const int window_width = 800, window_height = 600; if (glfwInit() != GL_TRUE) Shut_Down(1); int red_bits = glfwGetWindowParam(GLFW_RED_BITS); glfwOpenWindowHint(GLFW_RED_BITS, 8); assert(glfwGetWindowParam(GLFW_RED_BITS) == 8); glfwOpenWindowHint(GLFW_RED_BITS, red_bits); // 800 x 600, 16 bit color, no depth, alpha or stencil buffers, windowed if (glfwOpenWindow(window_width, window_height, 5, 6, 5, 0, 0, 0, GLFW_WINDOW) != GL_TRUE) Shut_Down(1); glfwSetWindowTitle("The GLFW Window"); glfwSetKeyCallback( OnKeyPressed ); glfwSetCharCallback( OnCharPressed ); glfwSetWindowCloseCallback(OnClose); glfwSetWindowSizeCallback(OnResize); glfwSetWindowRefreshCallback(OnRefresh); glfwSetMouseWheelCallback(OnMouseWheel); glfwSetMousePosCallback(OnMouseMove); glfwSetMouseButtonCallback(OnMouseClick); // set the projection matrix to a normal frustum with a max depth of 50 glMatrixMode(GL_PROJECTION); glLoadIdentity(); float aspect_ratio = ((float)window_height) / window_width; glFrustum(.5, -.5, -.5 * aspect_ratio, .5 * aspect_ratio, 1, 50); glMatrixMode(GL_MODELVIEW); PullInfo(); } void Shut_Down(int return_code) { glfwTerminate(); exit(return_code); } void Iteration() { // calculate time elapsed, and the amount by which stuff rotates double current_time = glfwGetTime(), delta_rotate = (current_time - old_time) * rotations_per_tick * 360; old_time = current_time; if (glfwGetKey(GLFW_KEY_LEFT) == GLFW_PRESS) rotate_y += delta_rotate; if (glfwGetKey(GLFW_KEY_RIGHT) == GLFW_PRESS) rotate_y -= delta_rotate; // z axis always rotates rotate_z += delta_rotate; // clear the buffer glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // draw the figure Draw(); // Test that glfwSwapInterval doesn't crash (although we don't test actual timings) static int i = 0; glfwSwapInterval(i); if (i < 2) ++i; // swap back and front buffers glfwSwapBuffers(); } void Draw(void) { int width, height, x; double t; t = glfwGetTime (); glfwGetMousePos (&x, NULL); // Get window size (may be different than the requested size) glfwGetWindowSize (&width, &height); // Special case: avoid division by zero below height = height > 0 ? height : 1; glViewport (0, 0, width, height); // Clear color buffer to black glClearColor (0.1f, 0.2f, 0.3f, 0.0f); glClear (GL_COLOR_BUFFER_BIT); // Select and setup the projection matrix glMatrixMode (GL_PROJECTION); glLoadIdentity (); gluPerspective (65.0f, (GLfloat) width / (GLfloat) height, 1.0f, 100.0f); // Select and setup the modelview matrix glMatrixMode (GL_MODELVIEW); glLoadIdentity (); gluLookAt (0.0f, 1.0f, 0.0f, // Eye-position 0.0f, 20.0f, 0.0f, // View-point 0.0f, 0.0f, 1.0f); // Up-vector // Draw a rotating colorful triangle //glTranslatef (0.0f, 14.0f, 0.0f); glTranslatef (0.0f, 1.0f, 0.0f); glRotatef (0.3f * (GLfloat) x + (GLfloat) t * 100.0f, 0.0f, 0.0f, 1.0f); glBegin (GL_TRIANGLES); glColor3f (1.0f, 0.0f, 0.0f); glVertex3f (-5.0f, 0.0f, -4.0f); glColor3f (0.0f, 1.0f, 0.0f); glVertex3f (5.0f, 0.0f, -4.0f); glColor3f (0.0f, 0.0f, 1.0f); glVertex3f (0.0f, 0.0f, 6.0f); glEnd (); // Swap buffers glfwSwapBuffers (); } void OnCharPressed( int character, int action ){ if(action == GLFW_PRESS) printf("'%c' (%i) char is pressed\n", character, character); if(action == GLFW_RELEASE) printf("'%c' (%i) char is released\n", character, character); } char* GetKeyName(int key){ switch(key){ case GLFW_KEY_UNKNOWN: return "unknown"; case GLFW_KEY_SPACE: return "space"; case GLFW_KEY_SPECIAL: return "special"; case GLFW_KEY_ESC: return "escape"; case GLFW_KEY_F1 : return "F1"; case GLFW_KEY_F2 : return "F2"; case GLFW_KEY_F3 : return "F3"; case GLFW_KEY_F4 : return "F4"; case GLFW_KEY_F5 : return "F5"; case GLFW_KEY_F6 : return "F6"; case GLFW_KEY_F7 : return "F7"; case GLFW_KEY_F8 : return "F8"; case GLFW_KEY_F9 : return "F9"; case GLFW_KEY_F10: return "F10"; case GLFW_KEY_F11: return "F11"; case GLFW_KEY_F12: return "F12"; case GLFW_KEY_F13: return "F13"; case GLFW_KEY_F14: return "F14"; case GLFW_KEY_F15: return "F15"; case GLFW_KEY_F16: return "F16"; case GLFW_KEY_F17: return "F17"; case GLFW_KEY_F18: return "F18"; case GLFW_KEY_F19: return "F19"; case GLFW_KEY_F20: return "F20"; case GLFW_KEY_F21: return "F21"; case GLFW_KEY_F22: return "F22"; case GLFW_KEY_F23: return "F23"; case GLFW_KEY_F24: return "F24"; case GLFW_KEY_F25: return "F25"; case GLFW_KEY_UP : return "up"; case GLFW_KEY_DOWN: return "down"; case GLFW_KEY_LEFT: return "left"; case GLFW_KEY_RIGHT: return "right"; case GLFW_KEY_LSHIFT: return "left shift"; case GLFW_KEY_RSHIFT: return "right shift"; case GLFW_KEY_LCTRL: return "left ctrl"; case GLFW_KEY_RCTRL: return "right ctrl"; case GLFW_KEY_LALT: return "left alt"; case GLFW_KEY_RALT: return "right alt"; case GLFW_KEY_TAB: return "tab"; case GLFW_KEY_ENTER: return "enter"; case GLFW_KEY_BACKSPACE: return "backspace"; case GLFW_KEY_INSERT: return "insertr"; case GLFW_KEY_DEL: return "del"; case GLFW_KEY_PAGEUP: return "page up"; case GLFW_KEY_PAGEDOWN: return "page down"; case GLFW_KEY_HOME: return "home"; case GLFW_KEY_END: return "end"; case GLFW_KEY_KP_0: return "0"; case GLFW_KEY_KP_1: return "1"; case GLFW_KEY_KP_2: return "2"; case GLFW_KEY_KP_3: return "3"; case GLFW_KEY_KP_4: return "4"; case GLFW_KEY_KP_5: return "5"; case GLFW_KEY_KP_6: return "6"; case GLFW_KEY_KP_7: return "7"; case GLFW_KEY_KP_8: return "8"; case GLFW_KEY_KP_9: return "9"; case GLFW_KEY_KP_DIVIDE: return "/"; case GLFW_KEY_KP_MULTIPLY: return "*"; case GLFW_KEY_KP_SUBTRACT: return "-"; case GLFW_KEY_KP_ADD: return "+"; case GLFW_KEY_KP_DECIMAL: return "."; case GLFW_KEY_KP_EQUAL: return "="; case GLFW_KEY_KP_ENTER: return "enter"; case GLFW_KEY_KP_NUM_LOCK: return "num lock"; case GLFW_KEY_CAPS_LOCK: return "caps lock"; case GLFW_KEY_SCROLL_LOCK: return "scroll lock"; case GLFW_KEY_PAUSE: return "pause"; case GLFW_KEY_LSUPER: return "left super"; case GLFW_KEY_RSUPER: return "right super"; case GLFW_KEY_MENU: return "menu"; } char* chr = malloc(2*sizeof(char)); chr[0] = key; chr[1] = '\0'; return chr; } char* GetParamName(int param){ switch(param){ case GLFW_WINDOW : return "GLFW_WINDOW"; case GLFW_FULLSCREEN : return "GLFW_FULLSCREEN"; case GLFW_OPENED : return "GLFW_OPENED"; case GLFW_ACTIVE : return "GLFW_ACTIVE"; case GLFW_ICONIFIED : return "GLFW_ICONIFIED"; case GLFW_ACCELERATED : return "GLFW_ACCELERATED"; case GLFW_RED_BITS : return "GLFW_RED_BITS"; case GLFW_GREEN_BITS : return "GLFW_GREEN_BITS"; case GLFW_BLUE_BITS : return "GLFW_BLUE_BITS"; case GLFW_ALPHA_BITS : return "GLFW_ALPHA_BITS"; case GLFW_DEPTH_BITS : return "GLFW_DEPTH_BITS"; case GLFW_STENCIL_BITS : return "GLFW_STENCIL_BITS"; case GLFW_REFRESH_RATE : return "GLFW_REFRESH_RATE"; case GLFW_ACCUM_RED_BITS : return "GLFW_ACCUM_RED_BITS"; case GLFW_ACCUM_GREEN_BITS : return "GLFW_ACCUM_GREEN_BITS"; case GLFW_ACCUM_BLUE_BITS : return "GLFW_BLUE_BITS"; case GLFW_ACCUM_ALPHA_BITS : return "GLFW_ALPHA_BITS"; case GLFW_AUX_BUFFERS : return "GLFW_AUX_BUFFERS"; case GLFW_STEREO : return "GLFW_STEREO"; case GLFW_WINDOW_NO_RESIZE : return "GLFW_WINDOW_NO_RESIZE"; case GLFW_FSAA_SAMPLES : return "GLFW_FSAA_SAMPLES"; case GLFW_OPENGL_VERSION_MAJOR : return "GLFW_OPENGL_VERSION_MAJOR"; case GLFW_OPENGL_VERSION_MINOR : return "GLFW_OPENGL_VERSION_MINOR"; case GLFW_OPENGL_FORWARD_COMPAT : return "GLFW_OPENGL_FORWARD_COMPAT"; case GLFW_OPENGL_DEBUG_CONTEXT : return "GLFW_OPENGL_DEBUG_CONTEXT"; case GLFW_OPENGL_PROFILE : return "GLFW_OPENGL_PROFILE"; case GLFW_OPENGL_CORE_PROFILE : return "GLFW_OPENGL_CORE_PROFILE | GLFW_PRESENT"; case GLFW_OPENGL_COMPAT_PROFILE : return "GLFW_OPENGL_COMPAT_PROFILE | GLFW_AXES"; case GLFW_MOUSE_CURSOR : return "GLFW_MOUSE_CURSOR"; case GLFW_STICKY_KEYS : return "GLFW_STICKY_KEYS"; case GLFW_STICKY_MOUSE_BUTTONS : return "GLFW_STICKY_MOUSE_BUTTONS"; case GLFW_SYSTEM_KEYS : return "GLFW_SYSTEM_KEYS"; case GLFW_KEY_REPEAT : return "GLFW_KEY_REPEAT"; case GLFW_AUTO_POLL_EVENTS : return "GLFW_AUTO_POLL_EVENTS"; case GLFW_WAIT : return "GLFW_WAIT"; case GLFW_NOWAIT : return "GLFW_NOWAIT"; case GLFW_BUTTONS : return "GLFW_BUTTONS"; case GLFW_NO_RESCALE_BIT : return "GLFW_NO_RESCALE_BIT"; case GLFW_ORIGIN_UL_BIT : return "GLFW_ORIGIN_UL_BIT"; case GLFW_BUILD_MIPMAPS_BIT : return "GLFW_BUILD_MIPMAPS_BIT"; case GLFW_ALPHA_MAP_BIT : return "GLFW_ALPHA_MAP_BIT"; default : return "Invalid param"; } } void OnKeyPressed( int key, int action ){ const char* key_name = GetKeyName(key); if(key_name == 0) return; if(action == GLFW_PRESS) printf("'%s' (%i) key is pressed\n", key_name, key); if(action == GLFW_RELEASE) printf("'%s' (%i) key is released\n", key_name, key); if(action == GLFW_RELEASE && key == GLFW_KEY_ENTER) PullInfo(); } int OnClose(){ printf("Closed\n"); return 0; } void OnRefresh(){ printf("Refresh\n"); } void OnResize( int width, int height ){ printf("Resizing to %i %i\n", width, height); } void OnMouseClick( int button, int action ){ if(action == GLFW_PRESS) printf("Mouse button %i has been pressed\n", button); if(action == GLFW_RELEASE) printf("Mouse button %i has been released\n", button); } void OnMouseMove( int x, int y ){ int lState = glfwGetMouseButton(GLFW_MOUSE_BUTTON_LEFT); if (lState == GLFW_PRESS) printf("Dragged %i to %i %i\n", GLFW_MOUSE_BUTTON_LEFT, x, y); if(lState == GLFW_RELEASE) printf("Moved %i to %i %i\n", GLFW_MOUSE_BUTTON_LEFT, x, y); } void OnMouseWheel( int pos ){ printf("Mouse wheel has been moved to %i\n", pos); } void PullInfo(){ printf("================================================================================\n"); int major, minor, rev; glfwGetVersion(&major, &minor, &rev); printf("GLFW version is %i.%i.%i\n", major, minor, rev); int width, height; glfwGetWindowSize(&width, &height); printf("Window size is %i %i\n", width, height); int status = glfwGetKey(GLFW_KEY_LCTRL); if(status == GLFW_PRESS) printf("Left control is pressed\n"); else printf("Left control is released\n"); status = glfwGetMouseButton(GLFW_MOUSE_BUTTON_1); if(status == GLFW_PRESS) printf("Mouse button 1 is pressed\n"); else printf("Mouse button 1 is released\n"); int x, y; glfwGetMousePos(&x, &y); printf("Mouse position is %i %i\n", x, y); int wheel = glfwGetMouseWheel(); printf("Mouse wheel pos is %i\n", wheel); double time = glfwGetTime(); printf("Time is %f\n", time); glfwGetGLVersion(&major, &minor, &rev); printf("GL version is %i.%i.%i\n", major, minor, rev); int proc = glfwGetNumberOfProcessors(); printf("%i processors are available\n", proc); unsigned int i; for(i = 0; i