github.com/rricharz.Tek4010
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fixed a bug slowing down drawing of small vectors

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¨Rene Richarz 2019-03-29 13:36:41 +01:00
parent bd25d537c3
commit d2f5d3efd0
3 changed files with 29 additions and 31 deletions
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tek4010
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58
tek4010.c
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@ -9,7 +9,7 @@
#define DEBUG 0 // print debug info
#define TODO 8 // for speed reasons, draw multiple objects until screen updates
#define TODO 8 // for speed reasons, draw multiple objects until screen updates
#include <stdio.h>
#include <stdlib.h>
@ -174,12 +174,12 @@ void tek4010_init(int argc, char* argv[])
close(putKeysPipe[0]); // not used
// use termios to turn off line buffering for both pipes
struct termios term;
tcgetattr(getDataPipe[0], &term);
term.c_lflag &= ~ICANON ;
tcsetattr(getDataPipe[0], TCSANOW,&term);
tcgetattr(putKeysPipe[1], &term);
tcsetattr(putKeysPipe[0], TCSANOW,&term);
// struct termios term;
// tcgetattr(getDataPipe[0], &term);
// term.c_lflag &= ~ICANON ;
// tcsetattr(getDataPipe[0], TCSANOW,&term);
// tcgetattr(putKeysPipe[1], &term);
// tcsetattr(putKeysPipe[0], TCSANOW,&term);
// open now a stream from the getDataPipe descriptor
getData = fdopen(getDataPipe[0],"r");
@ -332,24 +332,23 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int width, int height, int first)
mode,tag, ch & 31);
}
if (tag == 0) {
return; // each coordinate byte must have a tag. If not, ignore
}
if (tag != 0) {
if ((mode == 5) && (tag != 1)) mode = 6;
if ((mode == 5) && (tag != 1)) mode = 6;
if ((mode == 7) && (tag == 3)) {
// this overwrites the extra data byte of the 4014 for the
// persistent mode ccordinates and stores it for further use
mode = 6;
xy4014 = yl;
if (DEBUG)
printf("4014 coordinates, overwrite last value\n");
}
if ((mode == 7) && (tag == 3)) {
// this overwrites the extra data byte of the 4014 for the
// persistent mode ccordinates and stores it for further use
mode = 6;
xy4014 = yl;
if (DEBUG)
printf("4014 coordinates, overwrite last value\n");
}
if ((mode == 6) && (tag != 3)) mode = 7;
if ((mode == 6) && (tag != 3)) mode = 7;
if ((mode == 7) && (tag != 1)) mode = 8;
if ((mode == 7) && (tag != 1)) mode = 8;
}
}
@ -376,8 +375,7 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int width, int height, int first)
x2 = xh + xl;
y2 = yh + yl;
if (DEBUG) printf("tag=%d,***** Drawing vector to (%d,%d)\n",
tag, x2, y2);
if (DEBUG) printf("tag=%d,***** Drawing vector to (%d,%d)\n",tag,x2,y2);
cairo_move_to(cr, x0, WINDOW_HEIGHT - y0);
cairo_line_to(cr, x2, WINDOW_HEIGHT - y2);
cairo_stroke (cr);
@ -388,14 +386,14 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int width, int height, int first)
isBrightSpot = 1;
// for speed reasons, do not update screen right away
// if many very small verctors are drawn
// if many very small vectors are drawn
todo--;
if ((x2-x0) > TODO) todo = 0;
if ((x0-x2) > TODO) todo = 0;
if ((y2-y0) > TODO) todo = 0;
if ((y0-y2) > TODO) todo = 0;
if ((x2-x0) > 25) todo = 0;
if ((x0-x2) > 25) todo = 0;
if ((y2-y0) > 25) todo = 0;
if ((y0-y2) > 25) todo = 0;
x0 = x2; // prepare to additional vectors
x0 = x2; // prepare for additional vectors
y0 = y2;
mode = 5;
break;
@ -460,7 +458,7 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int width, int height, int first)
y0 += vDotsPerChar;
break;
case 13: // return
mode = 0; todo = 0; x0 = leftmargin;
mode = 0; x0 = leftmargin;
break;
case 27: // escape
mode = 30;

2
tek4010.h
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@ -1,6 +1,6 @@
#define WINDOW_WIDTH 1024 // proposed width of main window
#define WINDOW_HEIGHT 780 // proposed height of main window
#define WINDOW_HEIGHT 780 // proposed height of main window
#define WINDOW_NAME "Tektronix 4010" // name of main window
#define ICON_NAME "" // path to icon for window