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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: glutDstr.cpp
*
* DESCRIPTION: convert display string into a Be options variable
***********************************************************/
/***********************************************************
* Headers
***********************************************************/
#include <GL/glut.h>
#include <string.h>
#include <stdlib.h>
#include "glutint.h"
#include "glutState.h"
/***********************************************************
* FUNCTION: glutInitDisplayString
*
* DESCRIPTION: sets the display string variable
***********************************************************/
void APIENTRY
glutInitDisplayString(const char *string)
{
if (gState.displayString) {
free(gState.displayString);
}
if (string) {
gState.displayString = strdup(string);
if (!gState.displayString)
__glutFatalError("out of memory.");
} else
gState.displayString = NULL;
}
/***********************************************************
* FUNCTION: __glutConvertDisplayModeFromString
*
* DESCRIPTION: converts the current display mode into a BGLView
* display mode, printing warnings as appropriate.
*
* PARAMETERS: if options is non-NULL, the current display mode is
* returned in it.
*
* RETURNS: 1 if the current display mode is possible, else 0
***********************************************************/
int __glutConvertDisplayModeFromString(unsigned long *options) {
ulong newoptions = 0;
char *word = strtok(gState.displayString, " \t");
do {
char *cstr = strpbrk(word, "=><!~");
if(cstr)
*cstr = '\0';
// this is the most minimal possible parser. scan for
// options that we support, and add them to newoptions
// this will certainly cause it to accept things that we
// don't actually support, but if we don't support it, the
// program's probably not going to work anyway.
if(!strcmp(word, "alpha")) {
newoptions |= BGL_ALPHA;
} else if((!strcmp(word, "acc")) || (!strcmp(word, "acca"))) {
newoptions |= BGL_ACCUM;
} else if(!strcmp(word, "depth")) {
newoptions |= BGL_DEPTH;
} else if(!strcmp(word, "double")) {
newoptions |= BGL_DOUBLE;
} else if(!strcmp(word, "stencil")) {
newoptions |= BGL_STENCIL;
}
} while((word = strtok(0, " \t")) != 0);
if (options)
*options = newoptions;
return 1; // assume we support it
}
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