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/* Tektronix terminal window interface for Metafont. */
#define EXTERN extern
#include "../mfd.h"
#ifdef TEKTRONIXWIN /* Whole file */
#define FORMFEED 12
#define ESCAPE 27
#define GS 29
#define US 31
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define WIDTH 1024 /* Screen width */
#define HEIGHT 780 /* Screen height */
#define WIDTHINBYTES (WIDTH/8) /* Only works if WIDTH % 8 == 0 */
#define SETBIT(row,col) screen_pixel[row*WIDTHINBYTES+col/8] |= 1 << 7-col%8
#define CLEARBIT(row,col) screen_pixel[row*WIDTHINBYTES+col/8] &= \
~(1 << 7-col%8)
#define ISSET(row,col) (screen_pixel[row*WIDTHINBYTES+col/8] & 1 << 7-col%8)
char screen_pixel[WIDTHINBYTES*HEIGHT];
char zero_array[WIDTHINBYTES];
#include <mfdisplay.h>
/*
* function init_screen: boolean;
*
* Return true if window operations legal.
* We always return true.
*/
int
mf_tektronix_initscreen(void)
{
memset(zero_array, 0, sizeof(zero_array));
return 1;
}
/*
* procedure updatescreen;
*
* Print out the screen bitmap.
*/
void
mf_tektronix_updatescreen(void)
{
int r, c, startc, makingline;
printf("%c%c", ESCAPE, FORMFEED);
for (r = 0; r < HEIGHT; r++) {
makingline = FALSE;
if (memcmp(&screen_pixel[r*WIDTHINBYTES],zero_array,WIDTHINBYTES) == 0)
continue;
for (c = 0; c < WIDTH; c++) {
if (ISSET(r, c)) {
if (!makingline) {
makingline = TRUE;
startc = c;
}
} else if (makingline) {
putchar(GS);
putchar(0x20|((HEIGHT-1)-r)>>5);
putchar(0x60|((HEIGHT-1)-r)&0x1F);
putchar(0x20|startc>>5);
putchar(0x40|startc&0x1F);
putchar(0x60|((HEIGHT-1)-r)&0x1F); /* Don't send high y */
putchar(0x20|c>>5);
putchar(0x40|c&0x1F);
makingline = FALSE;
}
}
if (makingline) {
putchar(GS);
putchar(0x20|((HEIGHT-1)-r)>>5);
putchar(0x60|((HEIGHT-1)-r)&0x1F);
putchar(0x20|startc>>5);
putchar(0x40|startc&0x1F);
putchar(0x60|((HEIGHT-1)-r)&0x1F); /* Don't send high y */
putchar(0x20|c>>5);
putchar(0x40|c&0x1F);
}
}
printf("%c%c%c%c%c", GS, 0x23, 0x66, 0x20, 0x40);
putchar(US);
fflush(stdout);
}
/*
* procedure blankrectangle(left, right, top, bottom: integer);
*
* Blanks out a port of the screen.
*/
void
mf_tektronix_blankrectangle (screencol left,
screencol right,
screenrow top,
screenrow bottom)
{
int r, c;
if (left == 0 && right == WIDTH && top == 0 && bottom == HEIGHT)
memset(screen_pixel, 0, sizeof(screen_pixel));
else
for (r = top; r < bottom; r++)
for (c = left; c < right; c++)
CLEARBIT(r, c);
}
/*
* 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.
*/
void
mf_tektronix_paintrow (screenrow row,
pixelcolor init_color,
transspec transition_vector,
screencol vector_size)
{
int k = 0;
int c = transition_vector[0];
do {
k++;
do {
if (init_color)
SETBIT(row, c);
else
CLEARBIT(row, c);
} while (++c != transition_vector[k]);
init_color = !init_color;
} while (k != vector_size);
}
#else
int tek_dummy;
#endif /* TEKTRONIXWIN */
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