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authorKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
committerKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
commitad547a6b5986815fda458221149728d9d9ab1d87 (patch)
tree16296910eb3eca724371474ea9aea3994dc69614 /Build/source/texk/web2c/window/hp2627.c
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/window/hp2627.c')
-rw-r--r--Build/source/texk/web2c/window/hp2627.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/window/hp2627.c b/Build/source/texk/web2c/window/hp2627.c
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+++ b/Build/source/texk/web2c/window/hp2627.c
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+/*
+ * HP2627 Terminal Window interface to Unix Metafont.
+ */
+
+#define EXTERN extern
+#include "../mfd.h"
+
+#ifdef HP2627WIN
+
+#include <stdio.h>
+
+/*
+ * HP2627a Color Graphics Terminal: Escape code definitions
+ *
+ * Drawing pen colors
+ */
+#define HP2627_BLACK '0'
+#define HP2627_RED '1'
+#define HP2627_GREEN '2'
+#define HP2627_YELLOW '3'
+#define HP2627_BLUE '4'
+#define HP2627_MAGENTA '5'
+#define HP2627_CYAN '6'
+#define HP2627_WHITE '7'
+
+/*
+ * Initialization: just do a hard graphics reset
+ * (then we can depend on the defaults
+ * being as we want them)
+ */
+#define HP2627_INITSTRING "\033*wR"
+#define HP2627_INITSTRINGLEN 4
+
+/*
+ * We want the text to be visible over both background and forground
+ * graphics data; the best color combination I found for this
+ * was to set the background RED and then paint with BLUE,
+ * although the eye doesn't focus on BLUE very well (black
+ * might be better? Or green? [to get in the holiday mood])
+ */
+#define HP2627_BACKGROUNDPEN HP2627_RED
+#define HP2627_FOREGROUNDPEN HP2627_BLUE
+
+static char mf_hp2627_pencolors[2] = {
+ HP2627_BACKGROUNDPEN, /* white */
+ HP2627_FOREGROUNDPEN /* black */
+};
+
+/*
+ * Screen dimensions: Note the origin is at the lower-left corner,
+ * not the upper left as MF expects - hence we need to translate.
+ */
+#define HP2627_MAXX 511
+#define HP2627_MAXY 389
+
+/*
+ * The actual Graphics routines. Note that these are highly tty
+ * dependent so I can minimize the number of characters that
+ * need to be sent to paint an image, since we only talk to
+ * the HP at 9.6Kb.
+ */
+
+/*
+ * function init_screen: boolean;
+ *
+ * Return true if window operations legal.
+ * We always return true (I suppose we could try to
+ * sense status or something masochistic like that)
+ */
+
+#include <mfdisplay.h>
+
+int mf_hp2627_initscreen(void)
+{
+ (void) fflush(stdout); /* make sure pascal-level output flushed */
+ (void) write(fileno(stdout), HP2627_INITSTRING, HP2627_INITSTRINGLEN);
+ return(1);
+}
+
+/*
+ * procedure updatescreen;
+ *
+ * Just make sure screen is ready to view
+ * (since we do Unix-level WRITE()s,
+ * we don't really need to flush stdio,
+ * but why not?)
+ */
+
+void mf_hp2627_updatescreen(void)
+{
+ (void) fflush(stdout);
+}
+
+/*
+ * procedure blankrectangle(left, right, top, bottom: integer);
+ *
+ * reset rectangle bounded by ([left,right],[top,bottom])
+ * to background color
+ */
+
+void mf_hp2627_blankrectangle (screencol left,
+ screencol right,
+ screenrow top,
+ screenrow bottom)
+{
+ char sprbuf[128];
+
+ (void) sprintf(sprbuf, "\033*m%cx%d,%d %d,%dE", HP2627_BACKGROUNDPEN,
+ left, HP2627_MAXY-bottom,
+ right, HP2627_MAXY-top);
+ (void) write(fileno(stdout), sprbuf, strlen(sprbuf));
+}
+
+/*
+ * procedure paintrow(
+ * row: screenrow;
+ * init_color: pixelcolor;
+ * var trans_vector: transspec;
+ * vector_size: screencol );
+ *
+ * Paint "row" starting with color "init_color", up to next
+ * transition specified by "transition_vector", switch colors,
+ * and continue for "vector_size" transitions.
+ */
+
+/*
+ * First some useful definitions:
+ */
+#define ASCIILABS 0 /* plot cmd format: ASCII long abs */
+#define BINLABS 1 /* plot cmd format: BINARY long abs */
+#define BINSINC 2 /* plot cmd format: BINARY short incr */
+
+#define ABS(x) ((x>=0)?x:-x) /* absolute value */
+
+/*
+ * An optimized "move to (x,y), with current pen lowered unless UP is
+ * true" function. Takes advantage of short commands for short
+ * movements to minimize character traffic to term.
+ *
+ * Note: the "x -= 1;" fudge is because we only want to DRAW
+ * to the next transition_vector entry - 1, but if we
+ * have the pen raised, we want to move to exactly the
+ * next point.
+ */
+#define MOVETO(x,y,up) \
+ if (up) *op++ = 'a'; \
+ else x -= 1; \
+ if (ABS(x-oldx) < 16 && ABS(y-oldy) < 16) { \
+ if (currentformat != BINSINC) { \
+ *op++ = 'j'; \
+ currentformat = BINSINC; \
+ } \
+ *op++ = (((x-oldx) & 0x1f) + ' '); \
+ *op++ = (((y-oldy) & 0x1f) + ' '); \
+ } else { \
+ if (currentformat != BINLABS) { \
+ *op++ = 'i'; \
+ currentformat = BINLABS; \
+ } \
+ *op++ = (((x&0x3e0)>>5)+' '); \
+ *op++ = ((x&0x01f) +' '); \
+ *op++ = (((y&0x3e0)>>5)+' '); \
+ *op++ = ((y&0x01f) +' '); \
+ } \
+ oldx = x; \
+ oldy = y;
+
+void mf_hp2627_paintrow (screenrow row,
+ pixelcolor init_color,
+ transspec transition_vector,
+ screencol vector_size)
+{
+ register color;
+ char outbuf[512*6]; /* enough to hold an alternate color */
+ /* in each column */
+ register char *op;
+ register x, y, oldx, oldy;
+ int currentformat;
+
+ color = (init_color == 0)? 0 : 1;
+
+ /*
+ * We put all escape sequences in a buffer so the write
+ * has a chance of being atomic, and not interrupted by
+ * other independent output to our TTY. Also to avoid
+ * (literally millions) of stdio calls.
+ */
+ op = outbuf;
+ /*
+ * Select current pen to be the color of the first segment:
+ *
+ * our strategy here is to paint a long line from the first
+ * transition_vector value (left edge of row) to the last
+ * transition_vector entry (right edge of row). Then we switch
+ * colors to the contrasting color, and paint alternate
+ * segments with that color. Would that the HP2627 would provide
+ * a mode to paint the "background" color while the PEN is lifted.
+ * However, this is faster than using rectangular area fills.
+ */
+
+ *op++ = '\033'; *op++ = '*'; *op++ = 'm';
+ *op++ = mf_hp2627_pencolors[color];
+ *op++ = 'X';
+
+ /*
+ * Reset our "remembered" state for (X,Y) positioning and plot
+ * command format
+ */
+ oldx = oldy = -999;
+ currentformat = ASCIILABS;
+
+ /*
+ * Now, paint across the entire width of this row, make it the
+ * initial segment color.
+ */
+ x = *transition_vector;
+ y = HP2627_MAXY-row;
+ *op++ = '\033'; *op++ = '*'; *op++ = 'p';
+ MOVETO(x,y,1);
+ x = transition_vector[vector_size];
+ MOVETO(x,y,0);
+ *op++ = 'Z';
+
+ /*
+ * If there remain other segments (of contrasting color) to paint,
+ * switch pens colors and draw them
+ */
+ if (--vector_size > 0) {
+ *op++ = '\033'; *op++ = '*'; *op++ = 'm';
+ *op++ = mf_hp2627_pencolors[1-color]; *op++ = 'X';
+ color = 1-color;
+
+ oldx = oldy = -999;
+ currentformat = ASCIILABS;
+ *op++ = '\033'; *op++ = '*'; *op++ = 'p';
+ x = *++transition_vector;
+ MOVETO(x,y,1);
+ while (vector_size-- > 0) {
+ x = *++transition_vector;
+ MOVETO(x,y,(color==init_color));
+ color = 1 - color;
+ };
+ *op++ = 'Z';
+ };
+
+ /*
+ * Write the resulting plot commands, hopefully atomically
+ */
+ (void) write(fileno(stdout), outbuf, op-outbuf);
+}
+
+#else
+int hp2627_dummy;
+#endif /* HP2627WIN */