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/***********************************************************
* Copyright (C) 1997, Be Inc. Copyright (C) 1999, Jake Hamby.
*
* This program is freely distributable without licensing fees
* and is provided without guarantee or warrantee expressed or
* implied. This program is -not- in the public domain.
*
*
* FILE: glutInit.cpp
*
* DESCRIPTION: initialize GLUT state
***********************************************************/
/***********************************************************
* Headers
***********************************************************/
#include <GL/glut.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include "glutint.h"
#include "glutState.h"
#include "glutBlocker.h"
#include "beos_x11.h"
/***********************************************************
* Global variables
***********************************************************/
GlutState gState;
char *__glutProgramName = NULL;
/***********************************************************
* Private variables
***********************************************************/
static int __glutArgc;
static char **__glutArgv;
/***********************************************************
* FUNCTION: __glutInitTime
*
* DESCRIPTION: set up start time variable
***********************************************************/
void __glutInitTime(bigtime_t *beginning)
{
static int beenhere = 0;
static bigtime_t genesis;
if (!beenhere) {
genesis = system_time();
beenhere = 1;
}
*beginning = genesis;
}
/***********************************************************
* FUNCTION: removeArgs
*
* DESCRIPTION: helper function for glutInit to remove args
* from argv variable passed in
***********************************************************/
static void
removeArgs(int *argcp, char **argv, int numToRemove)
{
int i, j;
for (i = 0, j = numToRemove; argv[j]; i++, j++) {
argv[i] = argv[j];
}
argv[i] = NULL;
*argcp -= numToRemove;
}
/***********************************************************
* FUNCTION: bAppThread
*
* DESCRIPTION: starts the BApplication message loop running
***********************************************************/
static int32 bAppThread(void *arg) {
be_app->Lock();
return be_app->Run();
}
/***********************************************************
* FUNCTION: sigHandler
*
* DESCRIPTION: shuts down the app on CTRL-C
***********************************************************/
static void sigHandler(int) {
gState.quitAll = true;
gBlock.NewEvent();
}
/***********************************************************
* FUNCTION: glutInit (2.1)
*
* DESCRIPTION: create BApplication, parse cmd-line arguments,
* and set up gState structure.
***********************************************************/
void glutInit(int *argcp, char **argv) {
char *str, *geometry = NULL;
int i;
if (gState.display) {
__glutWarning("glutInit being called a second time.");
return;
}
/* Determine temporary program name. */
str = strrchr(argv[0], '/');
if (str == NULL) {
__glutProgramName = argv[0];
} else {
__glutProgramName = str + 1;
}
/* Make private copy of command line arguments. */
__glutArgc = *argcp;
__glutArgv = (char **) malloc(__glutArgc * sizeof(char *));
if (!__glutArgv)
__glutFatalError("out of memory.");
for (i = 0; i < __glutArgc; i++) {
__glutArgv[i] = strdup(argv[i]);
if (!__glutArgv[i])
__glutFatalError("out of memory.");
}
/* determine permanent program name */
str = strrchr(__glutArgv[0], '/');
if (str == NULL) {
__glutProgramName = __glutArgv[0];
} else {
__glutProgramName = str + 1;
}
/* parse arguments for standard options */
for (i = 1; i < __glutArgc; i++) {
if (!strcmp(__glutArgv[i], "-display")) {
__glutWarning("-display option only valid for X glut.");
if (++i >= __glutArgc) {
__glutFatalError(
"follow -display option with X display name.");
}
removeArgs(argcp, &argv[1], 2);
} else if (!strcmp(__glutArgv[i], "-geometry")) {
if (++i >= __glutArgc) {
__glutFatalError(
"follow -geometry option with geometry parameter.");
}
geometry = __glutArgv[i];
removeArgs(argcp, &argv[1], 2);
} else if (!strcmp(__glutArgv[i], "-direct")) {
__glutWarning("-direct option only valid for X glut.");
removeArgs(argcp, &argv[1], 1);
} else if (!strcmp(__glutArgv[i], "-indirect")) {
__glutWarning("-indirect option only valid for X glut.");
removeArgs(argcp, &argv[1], 1);
} else if (!strcmp(__glutArgv[i], "-iconic")) {
__glutWarning("-iconic option doesn't make sense in BeOS.");
removeArgs(argcp, &argv[1], 1);
} else if (!strcmp(__glutArgv[i], "-gldebug")) {
gState.debug = true;
removeArgs(argcp, &argv[1], 1);
} else if (!strcmp(__glutArgv[i], "-sync")) {
__glutWarning("-sync option only valid for X glut.");
removeArgs(argcp, &argv[1], 1);
} else {
/* Once unknown option encountered, stop command line
processing. */
break;
}
}
__glutInit(); /* Create BApplication first so DisplayWidth() works */
if (geometry) {
int flags, x, y, width, height;
/* Fix bogus "{width|height} may be used before set"
warning */
width = 0;
height = 0;
flags = XParseGeometry(geometry, &x, &y,
(unsigned int *) &width, (unsigned int *) &height);
if (WidthValue & flags) {
/* Careful because X does not allow zero or negative
width windows */
if (width > 0)
gState.initWidth = width;
}
if (HeightValue & flags) {
/* Careful because X does not allow zero or negative
height windows */
if (height > 0)
gState.initHeight = height;
}
if (XValue & flags) {
if (XNegative & flags)
x = DisplayWidth() + x - gState.initWidth;
/* Play safe: reject negative X locations */
if (x >= 0)
gState.initX = x;
}
if (YValue & flags) {
if (YNegative & flags)
y = DisplayHeight() + y - gState.initHeight;
/* Play safe: reject negative Y locations */
if (y >= 0)
gState.initY = y;
}
}
}
/***********************************************************
* FUNCTION: __glutInit
*
* DESCRIPTION: create BApplication, parse cmd-line arguments,
* and set up gState structure.
***********************************************************/
void __glutInit() {
// open BApplication
gState.display = new BApplication("application/x-glut-demo");
be_app->Unlock();
gState.appthread = spawn_thread(bAppThread, "BApplication", B_NORMAL_PRIORITY, 0);
resume_thread(gState.appthread);
bigtime_t unused;
__glutInitTime(&unused);
/* set atexit() function to destroy all windows before exiting */
if(atexit(__glutDestroyAllWindows))
__glutFatalError("can't set exit handler");
/* similarly, destroy all windows on CTRL-C */
signal(SIGINT, sigHandler);
}
/***********************************************************
* FUNCTION: glutInitWindowPosition (2.2)
*
* DESCRIPTION: set initial window position
***********************************************************/
void glutInitWindowPosition(int x, int y) {
gState.initX = x;
gState.initY = y;
}
/***********************************************************
* FUNCTION: glutInitWindowSize (2.2)
*
* DESCRIPTION: set initial window size
***********************************************************/
void glutInitWindowSize(int width, int height) {
gState.initWidth = width;
gState.initHeight = height;
}
/***********************************************************
* FUNCTION: glutInitDisplayMode (2.3)
*
* DESCRIPTION: set initial display mode
***********************************************************/
void glutInitDisplayMode(unsigned int mode) {
gState.displayMode = mode;
}
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