1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/main_glut.cc	Sat Feb 01 19:58:19 2014 +0200
     1.3 @@ -0,0 +1,205 @@
     1.4 +#include <stdlib.h>
     1.5 +#include <ctype.h>
     1.6 +#include <assert.h>
     1.7 +#include "opengl.h"
     1.8 +
     1.9 +#include "game.h"
    1.10 +#include "input.h"
    1.11 +#include "screen.h"
    1.12 +#include "logger.h"
    1.13 +
    1.14 +/* called by any other part of the game when a redisplay is needed
    1.15 + * (mostly useful for tools which do not redisplay continuously)
    1.16 + */
    1.17 +void request_redisplay();
    1.18 +
    1.19 +void swap_buffers();
    1.20 +
    1.21 +static void display(void);
    1.22 +static void reshape(int x, int y);
    1.23 +static void keydown(unsigned char key, int x, int y);
    1.24 +static void keyup(unsigned char key, int x, int y);
    1.25 +static void skeydown(int key, int x, int y);
    1.26 +static void skeyup(int key, int x, int y);
    1.27 +static void mouse(int bn, int state, int x, int y);
    1.28 +static void motion(int x, int y);
    1.29 +static void passive_motion(int x, int y);
    1.30 +
    1.31 +static long redisp_interval;
    1.32 +
    1.33 +int main(int argc, char **argv)
    1.34 +{
    1.35 +	glutInit(&argc, argv);
    1.36 +	glutInitWindowSize(800, 600);
    1.37 +	glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE | GLUT_MULTISAMPLE);
    1.38 +	glutCreateWindow("Xmass inferno");
    1.39 +
    1.40 +	glutDisplayFunc(display);
    1.41 +	glutReshapeFunc(reshape);
    1.42 +	glutKeyboardFunc(keydown);
    1.43 +	glutKeyboardUpFunc(keyup);
    1.44 +	glutSpecialFunc(skeydown);
    1.45 +	glutSpecialUpFunc(skeyup);
    1.46 +	glutMouseFunc(mouse);
    1.47 +	glutMotionFunc(motion);
    1.48 +	glutPassiveMotionFunc(passive_motion);
    1.49 +
    1.50 +	game_set_args(argc, argv);
    1.51 +	if(!game_init()) {
    1.52 +		return 1;
    1.53 +	}
    1.54 +	atexit(game_cleanup);
    1.55 +
    1.56 +	glutMainLoop();
    1.57 +	return 0;
    1.58 +}
    1.59 +
    1.60 +void request_redisplay()
    1.61 +{
    1.62 +	glutPostRedisplay();
    1.63 +}
    1.64 +
    1.65 +void swap_buffers()
    1.66 +{
    1.67 +	glUseProgram(0);
    1.68 +	glutSwapBuffers();
    1.69 +}
    1.70 +
    1.71 +static void display()
    1.72 +{
    1.73 +	long ival = current_screen()->redisplay_interval();
    1.74 +	if(ival && !redisp_interval) {
    1.75 +		debug_log("switching to auto-redisplay (interval: %ld)\n", redisp_interval);
    1.76 +		glutIdleFunc(request_redisplay);
    1.77 +	}
    1.78 +	if(!ival && redisp_interval) {
    1.79 +		debug_log("switching to manual redisplay\n");
    1.80 +		glutIdleFunc(0);
    1.81 +	}
    1.82 +	redisp_interval = ival;
    1.83 +
    1.84 +	game_display();
    1.85 +	// TODO implement framerate limiter
    1.86 +}
    1.87 +
    1.88 +
    1.89 +static void reshape(int x, int y)
    1.90 +{
    1.91 +	game_reshape(x, y);
    1.92 +}
    1.93 +
    1.94 +/* GLUT doesn't have any callbacks for modifier keys, so we fake it by calling
    1.95 + * this function all over the place, to generate fake events whenever a modifier
    1.96 + * key is detected to have changed state.
    1.97 + * The limitation is that this will only detect modkey changes whenever a regular
    1.98 + * key is pressed or released, or when a mouse button is pressed or released.
    1.99 + */
   1.100 +static void handle_modkeys()
   1.101 +{
   1.102 +	static int modstate;
   1.103 +
   1.104 +	int mod = glutGetModifiers();
   1.105 +	if(mod != modstate) {
   1.106 +		int diff = mod ^ modstate;
   1.107 +
   1.108 +		if(diff & GLUT_ACTIVE_SHIFT) {
   1.109 +			bool pressed = mod & GLUT_ACTIVE_SHIFT;
   1.110 +			game_key(KEY_LSHIFT, pressed);
   1.111 +		}
   1.112 +		if(diff & GLUT_ACTIVE_CTRL) {
   1.113 +			bool pressed = mod & GLUT_ACTIVE_CTRL;
   1.114 +			game_key(KEY_LCTRL, pressed);
   1.115 +		}
   1.116 +		if(diff & GLUT_ACTIVE_ALT) {
   1.117 +			bool pressed = mod & GLUT_ACTIVE_ALT;
   1.118 +			game_key(KEY_LALT, pressed);
   1.119 +		}
   1.120 +	}
   1.121 +	modstate = mod;
   1.122 +}
   1.123 +
   1.124 +static int translate_special_key(int key)
   1.125 +{
   1.126 +	if(key >= GLUT_KEY_F1 && key <= GLUT_KEY_F12) {
   1.127 +		return (key - GLUT_KEY_F1) + KEY_F1;
   1.128 +	}
   1.129 +	if(key >= GLUT_KEY_LEFT && key <= GLUT_KEY_PAGE_DOWN) {
   1.130 +		return (key - GLUT_KEY_LEFT) + KEY_LEFT;
   1.131 +	}
   1.132 +
   1.133 +	switch(key) {
   1.134 +	case GLUT_KEY_HOME:
   1.135 +		return KEY_HOME;
   1.136 +	case GLUT_KEY_END:
   1.137 +		return KEY_END;
   1.138 +	case GLUT_KEY_INSERT:
   1.139 +		return KEY_INSERT;
   1.140 +
   1.141 +	default:
   1.142 +		break;
   1.143 +	}
   1.144 +	return 0;
   1.145 +}
   1.146 +
   1.147 +static void keydown(unsigned char c, int x, int y)
   1.148 +{
   1.149 +	int key = c;
   1.150 +	if(key == 127) {
   1.151 +		key = KEY_DELETE;
   1.152 +	}
   1.153 +
   1.154 +	handle_modkeys();
   1.155 +	game_key(key, true);
   1.156 +}
   1.157 +
   1.158 +static void keyup(unsigned char c, int x, int y)
   1.159 +{
   1.160 +	int key = c;
   1.161 +	if(key == 127) {
   1.162 +		key = KEY_DELETE;
   1.163 +	}
   1.164 +
   1.165 +	handle_modkeys();
   1.166 +	game_key(key, false);
   1.167 +}
   1.168 +
   1.169 +static void skeydown(int key, int x, int y)
   1.170 +{
   1.171 +	handle_modkeys();
   1.172 +
   1.173 +	if((key = translate_special_key(key)) > 0) {
   1.174 +		game_key(key, true);
   1.175 +	}
   1.176 +}
   1.177 +
   1.178 +static void skeyup(int key, int x, int y)
   1.179 +{
   1.180 +	handle_modkeys();
   1.181 +
   1.182 +	if((key = translate_special_key(key)) > 0) {
   1.183 +		game_key(key, false);
   1.184 +	}
   1.185 +}
   1.186 +
   1.187 +static void mouse(int bn, int state, int x, int y)
   1.188 +{
   1.189 +	handle_modkeys();
   1.190 +
   1.191 +	int bnidx = bn - GLUT_LEFT_BUTTON;
   1.192 +	bool bnstate = state == GLUT_DOWN;
   1.193 +
   1.194 +	current_screen()->button(bnidx, bnstate, x, y);
   1.195 +	set_mouse_state(x, y, bnidx, bnstate);	// this MUST be after the event dispatch
   1.196 +}
   1.197 +
   1.198 +static void motion(int x, int y)
   1.199 +{
   1.200 +	set_mouse_state(x, y);
   1.201 +	current_screen()->motion(x, y, false);
   1.202 +}
   1.203 +
   1.204 +static void passive_motion(int x, int y)
   1.205 +{
   1.206 +	set_mouse_state(x, y);
   1.207 +	current_screen()->motion(x, y, true);
   1.208 +}