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/***********************************************************
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* Copyright (C) 1997, Be Inc. Copyright (C) 1999, Jake Hamby.
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* This program is freely distributable without licensing fees
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* and is provided without guarantee or warrantee expressed or
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* implied. This program is -not- in the public domain.
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* DESCRIPTION: convert display string into a Be options variable
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***********************************************************/
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/***********************************************************
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***********************************************************/
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#include "glutState.h"
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/***********************************************************
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* FUNCTION: glutInitDisplayString
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* DESCRIPTION: sets the display string variable
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***********************************************************/
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glutInitDisplayString(const char *string)
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if (gState.displayString) {
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free(gState.displayString);
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gState.displayString = strdup(string);
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if (!gState.displayString)
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__glutFatalError("out of memory.");
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gState.displayString = NULL;
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/***********************************************************
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* FUNCTION: __glutConvertDisplayModeFromString
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* DESCRIPTION: converts the current display mode into a BGLView
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* display mode, printing warnings as appropriate.
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* PARAMETERS: if options is non-NULL, the current display mode is
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* RETURNS: 1 if the current display mode is possible, else 0
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***********************************************************/
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int __glutConvertDisplayModeFromString(unsigned long *options) {
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char *word = strtok(gState.displayString, " \t");
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char *cstr = strpbrk(word, "=><!~");
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// this is the most minimal possible parser. scan for
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// options that we support, and add them to newoptions
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// this will certainly cause it to accept things that we
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// don't actually support, but if we don't support it, the
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// program's probably not going to work anyway.
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if(!strcmp(word, "alpha")) {
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newoptions |= BGL_ALPHA;
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} else if((!strcmp(word, "acc")) || (!strcmp(word, "acca"))) {
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newoptions |= BGL_ACCUM;
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} else if(!strcmp(word, "depth")) {
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newoptions |= BGL_DEPTH;
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} else if(!strcmp(word, "double")) {
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newoptions |= BGL_DOUBLE;
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} else if(!strcmp(word, "stencil")) {
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newoptions |= BGL_STENCIL;
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} while((word = strtok(0, " \t")) != 0);
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*options = newoptions;
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return 1; // assume we support it