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Fix for resizing

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This commit is contained in:
Bruce Hill 2019-06-13 15:27:47 -07:00
parent b35873bb61
commit 1909831e4d
1 changed files with 26 additions and 5 deletions
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31
conway.c
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@ -1,6 +1,7 @@
// A console conway's game of life program by Bruce Hill
// Released under the MIT license, see LICENSE for details.
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -11,8 +12,9 @@
#define CELL(cells, x, y) cells[(((y)+H) % H)*W + (((x)+W) % W)]
static char rules[2][9] = {{0,0,0,1,0,0,0,0,0}, {0,0,1,1,0,0,0,0,0}};
static unsigned int W, H;
static unsigned int W = 0, H = 0;
static char alive_color[64] = "\033[47m", dead_color[64] = "\033[0m";
int ttyin_fd = -1;
static void update(FILE *out, const char *cells, char *future_cells)
{
@ -39,6 +41,16 @@ static void update(FILE *out, const char *cells, char *future_cells)
fflush(out);
}
static void update_term_size(int sig)
{
(void)sig;
struct winsize sz = {0};
ioctl(ttyin_fd, TIOCGWINSZ, &sz);
W = sz.ws_col / 2;
H = sz.ws_row;
printf("WINSIZE: %d, %d", W, H);
}
static int gethexrgb(const char *str, int *r, int *g, int *b)
{
if (str[0] == '#') ++str;
@ -86,7 +98,7 @@ int main(int argc, char **argv) {
}
}
int ttyin_fd = open("/dev/tty", O_RDONLY | O_NONBLOCK);
ttyin_fd = open("/dev/tty", O_RDONLY | O_NONBLOCK);
if (ttyin_fd < 0) {
fprintf(stderr, "Couldn't open terminal input.\n");
return 1;
@ -107,7 +119,6 @@ int main(int argc, char **argv) {
return 1;
struct winsize wsize = {0};
ioctl(STDOUT_FILENO, TIOCGWINSZ, &wsize);
fputs("\033[?25l" // Hide cursor
"\033[?1049;" // Use alternate screen
"1000;" // Enable mouse x/y on press
@ -115,12 +126,14 @@ int main(int argc, char **argv) {
"1006" // Use mouse SGR mode
"h", tty_out);
update_term_size(0);
signal(SIGWINCH, update_term_size);
char *buffers[2];
int flipflop = 0;
int flipflop = 0, prev_W = W, prev_H = H;
resize:
// TODO: handle resize in SIGWINCH handler
// Cells are 2 characters wide so they look square
W = wsize.ws_col/2, H = wsize.ws_row;
buffers[0] = calloc(W*H, sizeof(char));
buffers[1] = calloc(W*H, sizeof(char));
for (int x = 0; x < W; x++)
@ -130,6 +143,14 @@ int main(int argc, char **argv) {
int draw_mode = 1, paused = 0;
fputs("\033[2J", tty_out);
while (1) {
if (prev_W != W || prev_H != H) {
prev_W = W, prev_H = H;
free(buffers[0]);
free(buffers[1]);
buffers[0] = calloc(W*H, sizeof(char));
buffers[1] = calloc(W*H, sizeof(char));
goto resize;
}
if (!paused) {
update(tty_out, buffers[flipflop], buffers[!flipflop]);
flipflop = !flipflop;