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#include <signal.h> |
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#include <setjmp.h> |
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#include <ctype.h> |
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VIEW ourview = STDVIEW; /* viewing parameters */ |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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int greyscale = 0; /* map colors to brightness? */ |
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char *devname = "X"; /* output device name */ |
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char *devname = dev_default; /* output device name */ |
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struct driver *dev = NULL; /* driver functions */ |
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RECT pframe; /* current frame boundaries */ |
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int pdepth; /* image depth in current frame */ |
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static jmp_buf mainloop; /* longjmp back to main loop */ |
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static char *reserve_mem = NULL; /* pre-allocated reserve memory */ |
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#define RESERVE_AMT 8192 /* amount of memory to reserve */ |
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#define CTRL(c) ('c'-'@') |
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devopen(devname); /* open device */ |
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newimage(); /* set up image */ |
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setjmp(mainloop); |
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for ( ; ; ) { /* quit in command() */ |
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while (hresolu <= 1<<pdepth && |
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vresolu <= 1<<pdepth) |
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} |
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memreserve() /* fill memory reserves */ |
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{ |
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if (reserve_mem != NULL) |
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return; /* got some already */ |
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reserve_mem = malloc(RESERVE_AMT); |
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} |
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memerror(detail) /* try and rescue a memory error */ |
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char *detail; |
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{ |
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if (reserve_mem == NULL) { |
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sprintf(errmsg, "out of memory %s", detail); |
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error(SYSTEM, errmsg); |
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} |
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free(reserve_mem); |
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reserve_mem = NULL; |
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do |
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command("out of memory: "); |
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while (reserve_mem == NULL); |
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longjmp(mainloop, 1); |
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} |
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command(prompt) /* get/execute command */ |
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char *prompt; |
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{ |
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char inpbuf[256]; |
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char *args; |
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again: |
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(*dev->comout)(prompt); /* get command + arguments */ |
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(*dev->comin)(inpbuf); |
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(*dev->comin)(inpbuf, prompt); /* get command + arguments */ |
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for (args = inpbuf; *args && *args != ' '; args++) |
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; |
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if (*args) *args++ = '\0'; |
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xsiz = (((pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
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ysiz = (((pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
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rl = (RECT *)malloc(xsiz*sizeof(RECT)); |
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if (rl == NULL) |
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memerror("in rsample"); |
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pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
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if (rl == NULL || pl == NULL) |
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error(SYSTEM, "out of memory in rsample"); |
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if (pl == NULL) |
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memerror("in rsample"); |
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/* |
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* Initialize the bottom row. |
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*/ |
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if (p->kid == NULL) { /* subdivide */ |
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if ((p->kid = newptree()) == NULL) |
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error(SYSTEM, "out of memory in refine"); |
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memerror("in refine"); |
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/* |
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* The following paint order can leave a black pixel |
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* when redraw() is called in (*dev->paintr)(). |