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#ifndef lint
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static const char RCSid[] = "$Id: implot.c,v 1.2 2003/11/15 02:13:37 schorsch 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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#include "meta.h"
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#include "plot.h"
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#include "imPfuncs.h"
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#include "imPcodes.h"
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#include <ctype.h>
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#define mapx(x) CONV(x,dxsize)
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#define mapy(y) CONV(y,dysize)
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#define DPI 296 /* dots per inch for imagen */
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#define TexFamily 90 /* family for texture glyphs */
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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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/* 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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/* 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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int dxsize, dysize; /* page size */
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static void settex(int pp);
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static void setpen(register int ps);
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void
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imInit(void) /* initialize imagen */
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{
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imout = stdout;
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fputs("@document(language imPress)", imout);
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fputs("@document(pagereversal off)", imout);
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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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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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static int curfont = -1;
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int fn;
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register char *cp;
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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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imSetAbsH(mapx(p->xy[XMN])); /* set page position */
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imSetAbsV(mapy(p->xy[YMN]));
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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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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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int x1, x2, y1, y2;
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short pp;
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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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setpen((p->arg0 >> 2) & 03);
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x1 = mapx(p->xy[XMN]);
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x2 = mapx(p->xy[XMX]);
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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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imCreatePath(2, x1, y1, x2, y2);
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imDrawPath(orOp);
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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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settex(pati[(a0 >> 2) & 03]);
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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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static int curpsiz = -1; /* current pen size */
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if (ps == curpsiz)
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return;
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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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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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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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if (pp == curtex) /* already set */
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return;
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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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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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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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int left, right, top, bottom;
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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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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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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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int left, right, top, bottom;
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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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setfill(p->arg0);
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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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imFillPath(orOp);
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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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int x = 0, y = 0;
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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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*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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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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int points[128];
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register int *pp;
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register char *s;
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pp = points;
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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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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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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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settex(p->arg0 & 077);
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imCreatePathV((pp-points)/2, points);
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imFillPath(orOp);
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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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