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#ifndef lint |
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static const char RCSid[] = "$Id: implot.c,v 1.1 2003/02/22 02:07:26 greg Exp $"; |
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#endif |
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/* |
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* Impress plotting functions |
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* |
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* 1/2/86 |
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*/ |
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|
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|
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#include "meta.h" |
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|
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#include "plot.h" |
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|
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#include "imPfuncs.h" |
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|
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#include "imPcodes.h" |
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|
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#include <ctype.h> |
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|
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|
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#define mapx(x) CONV(x,dxsize) |
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#define mapy(y) CONV(y,dysize) |
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|
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#define DPI 296 /* dots per inch for imagen */ |
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|
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#define TexFamily 90 /* family for texture glyphs */ |
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|
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/* operation codes for graphics */ |
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#define whiteOp 0 |
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#define shadeOp 3 |
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#define orOp 7 |
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#define blackOp 15 |
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|
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/* imagen resident fonts */ |
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static struct { |
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char *name; /* font name */ |
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int iwspace; /* interword spacing */ |
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short loaded; /* boolean true if font loaded */ |
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} font[] = { |
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{"cour07", 21, FALSE}, |
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{"cour08", 24, FALSE}, |
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{"cour10", 30, FALSE}, |
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{"cour12", 36, FALSE}, |
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{"cour14", 42, FALSE}, |
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{"zurm20", 60, FALSE} |
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}; |
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|
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/* map from our matrix string types */ |
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static int fontmap[16] = {3,4,4,5,2,4,4,5,1,2,2,3,0,2,2,3}; |
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|
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int dxsize, dysize; /* page size */ |
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|
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static void settex(int pp); |
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static void setpen(register int ps); |
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|
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|
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|
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void |
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imInit(void) /* initialize imagen */ |
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{ |
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|
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imout = stdout; |
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|
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fputs("@document(language imPress)", imout); |
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fputs("@document(pagereversal off)", imout); |
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|
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imSetPum(0); /* new path deletes old one */ |
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dxsize = dysize = 8 * DPI; /* square on 8.5 X 11 in. paper */ |
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imSetAbsH(DPI/4); /* .25 in. on left and right */ |
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imSetAbsV(dysize); |
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imSetHVSystem(3, 3, 4); /* conventional orientation */ |
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|
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} |
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|
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|
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void |
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printstr( /* output a string */ |
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register PRIMITIVE *p |
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) |
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|
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{ |
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static int curfont = -1; |
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int fn; |
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register char *cp; |
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|
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fn = fontmap[(p->arg0 >> 2) & 017]; /* get font number */ |
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/* set font */ |
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if (fn != curfont) { |
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imSetFamily(fn); |
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if (!font[fn].loaded) { |
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imCreateFamilyTable(fn, 1, 0, font[fn].name); |
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font[fn].loaded = TRUE; |
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} |
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imSetSp(font[fn].iwspace); |
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curfont = fn; |
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} |
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|
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imSetAbsH(mapx(p->xy[XMN])); /* set page position */ |
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imSetAbsV(mapy(p->xy[YMN])); |
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|
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for (cp = p->args; *cp; cp++) /* write out the string */ |
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if (isspace(*cp)) |
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imSp(); |
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else |
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im_putbyte(*cp); |
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|
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} |
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|
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|
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|
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|
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void |
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plotlseg( /* plot a line segment */ |
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register PRIMITIVE *p |
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) |
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|
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{ |
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int x1, x2, y1, y2; |
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short pp; |
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|
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pp = (p->arg0 >> 4) & 03; |
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if (p->arg0 & 0100 && pp != 0) |
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pp += 03; |
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settex(pp); |
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|
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setpen((p->arg0 >> 2) & 03); |
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|
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x1 = mapx(p->xy[XMN]); |
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x2 = mapx(p->xy[XMX]); |
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|
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if (p->arg0 & 0100) { |
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y1 = mapy(p->xy[YMX]); |
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y2 = mapy(p->xy[YMN]); |
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} else { |
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y1 = mapy(p->xy[YMN]); |
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y2 = mapy(p->xy[YMX]); |
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} |
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|
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imCreatePath(2, x1, y1, x2, y2); |
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imDrawPath(orOp); |
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|
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} |
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|
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|
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|
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void |
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setfill( /* set filling mode */ |
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register int a0 |
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) |
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|
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{ |
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|
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settex(pati[(a0 >> 2) & 03]); |
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|
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} |
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|
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|
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void |
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setpen( /* set pen size to ps */ |
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register int ps |
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) |
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|
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{ |
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static int curpsiz = -1; /* current pen size */ |
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|
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if (ps == curpsiz) |
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return; |
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|
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curpsiz = ps; |
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ps = WIDTH(ps); |
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ps = CONV(ps, dxsize); |
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if (ps < 2) |
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ps = 2; |
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else if (ps > 20) |
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ps = 20; |
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imSetPen(ps); |
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|
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} |
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|
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|
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void |
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settex( /* set texture pattern to pp */ |
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int pp |
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) |
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|
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{ |
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static int curtex = -1; /* current texture */ |
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static short ploaded[NPATS]; /* booleans for loaded patterns */ |
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char span[4]; |
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int i, k; |
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register int j; |
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|
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if (pp == curtex) /* already set */ |
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return; |
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|
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if (pp == 0) { /* all black */ |
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imSetTexture(0, 0); /* special case */ |
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curtex = 0; |
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return; |
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} |
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|
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if (pp >= NPATS || !ploaded[pp]) { /* download texture glyph */ |
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im_77(imP_BGLY, TexFamily, pp); /* family and member */ |
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im_putword(32); /* advance-width */ |
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im_putword(32); /* width */ |
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im_putword(0); /* left-offset */ |
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im_putword(32); /* height */ |
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im_putword(0); /* top-offset */ |
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for (i = PATSIZE-1; i >= 0; i--) { |
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for (j = 0; j < 4; j++) |
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span[j] = 0; |
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for (j = 0; j < 32; j++) |
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span[j>>3] |= ((pattern[pp][i>>3][j/(32/PATSIZE)] |
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>> (i&07)) & 01) << (7-(j&07)); |
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for (k = 0; k < 32/PATSIZE; k++) |
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for (j = 0; j < 4; j++) |
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im_putbyte(span[j]); |
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} |
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if (pp < NPATS) |
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ploaded[pp]++; |
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} |
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imSetTexture(TexFamily, pp); |
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curtex = pp; |
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|
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} |
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|
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|
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void |
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fillrect( /* fill a rectangle */ |
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register PRIMITIVE *p |
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) |
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|
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{ |
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int left, right, top, bottom; |
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|
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left = mapx(p->xy[XMN]); |
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right = mapx(p->xy[XMX]); |
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top = mapy(p->xy[YMX]); |
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bottom = mapy(p->xy[YMN]); |
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|
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setfill(p->arg0); |
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imCreatePath(4, left, bottom, right, bottom, right, top, left, top); |
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imFillPath(orOp); |
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|
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} |
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|
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|
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void |
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filltri( /* fill a triangle */ |
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register PRIMITIVE *p |
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) |
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|
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{ |
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int left, right, top, bottom; |
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|
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left = mapx(p->xy[XMN]); |
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right = mapx(p->xy[XMX]); |
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top = mapy(p->xy[YMX]); |
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bottom = mapy(p->xy[YMN]); |
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|
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setfill(p->arg0); |
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|
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switch (p->arg0 & 060) { |
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case 0: /* right (& down) */ |
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imCreatePath(3, left, bottom, right, bottom, right, top); |
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break; |
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case 020: /* up */ |
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imCreatePath(3, right, bottom, right, top, left, top); |
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break; |
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case 040: /* left */ |
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imCreatePath(3, right, top, left, top, left, bottom); |
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break; |
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case 060: /* down */ |
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imCreatePath(3, left, top, left, bottom, right, bottom); |
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break; |
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} |
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|
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imFillPath(orOp); |
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|
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} |
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|
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|
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|
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void |
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xform( /* transform a point according to p */ |
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register int *xp, |
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register int *yp, |
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register PRIMITIVE *p |
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) |
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|
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{ |
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int x = 0, y = 0; |
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|
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switch (p->arg0 & 060) { |
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case 0: /* right */ |
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x = *xp; |
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y = *yp; |
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break; |
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case 020: /* up */ |
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x = (XYSIZE-1) - *yp; |
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y = *xp; |
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break; |
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case 040: /* left */ |
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x = (XYSIZE-1) - *xp; |
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y = (XYSIZE-1) - *yp; |
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break; |
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case 060: /* down */ |
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x = *yp; |
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y = (XYSIZE-1) - *xp; |
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break; |
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} |
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|
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*xp = CONV(x, p->xy[XMX] - p->xy[XMN]) + p->xy[XMN]; |
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*yp = CONV(y, p->xy[YMX] - p->xy[YMN]) + p->xy[YMN]; |
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|
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} |
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|
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|
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void |
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fillpoly( /* fill a polygon */ |
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register PRIMITIVE *p |
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) |
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|
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{ |
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int points[128]; |
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register int *pp; |
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register char *s; |
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|
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pp = points; |
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|
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if ((s = nextscan(nextscan(p->args,"%d",(char*)pp),"%d",(char*)pp+1))==NULL) |
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error(USER, "illegal polygon spec in fillpoly"); |
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|
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xform(pp, pp+1, p); |
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pp[0] = mapx(pp[0]); pp[1] = mapy(pp[1]); |
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pp += 2; |
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|
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while ((s = nextscan(nextscan(s,"%d",(char*)pp),"%d",(char*)pp+1))!=NULL) { |
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xform(pp, pp+1, p); |
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pp[0] = mapx(pp[0]); pp[1] = mapy(pp[1]); |
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pp += 2; |
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} |
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pp[0] = points[0]; pp[1] = points[1]; |
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pp += 2; |
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|
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settex(p->arg0 & 077); |
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imCreatePathV((pp-points)/2, points); |
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imFillPath(orOp); |
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|
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if (p->arg0 & 0100) { /* draw border */ |
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settex(0); |
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setpen(0); |
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imDrawPath(orOp); |
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} |
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|
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} |
