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Add hot-reloadable charsets, expand output buffer sizing and macOS build support

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Harshit-Dhanwalkar 2026-06-17 15:52:43 +05:30
parent b179ccb32c
commit 9963f01810
10 changed files with 897 additions and 163 deletions
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31
C/src/thread_sharing.c
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@ -1,7 +1,9 @@
/*
Still uses pthread functions, TODO: replace them with raw futex syscalls and clone()
Still uses pthread functions, TODO: replace them with raw futex syscalls and
clone()
*/
#include "nolibc.h"
#include "ascii.h"
#include "capture.h"
@ -9,8 +11,6 @@ Still uses pthread functions, TODO: replace them with raw futex syscalls and clo
#include <stdint.h>
#include "nolibc.h"
// Producer thread for capturing frames
void *capture_thread(void *arg) {
shared_frame_t *sf = arg;
@ -53,11 +53,13 @@ void *capture_thread(void *arg) {
void *render_thread(void *arg) {
shared_frame_t *sf = arg;
// Allocate dynamic buffers
size_t out_size = ascii_out_size(sf->ascii_w, sf->ascii_h, sf->opts.color);
char *out_buf = malloc(out_size);
uint8_t *local_rgb =
sf->opts.color ? malloc(sf->width * sf->height * 3) : NULL;
int braille_w = sf->ascii_w * 2;
int braille_h = sf->ascii_h * 4;
size_t out_size = ascii_out_size(braille_w, braille_h, sf->opts.color);
char *out_buf = nl_malloc(out_size);
// TODO: extend shared_frame_t to carry an rgb double-buffer alongside gray
uint8_t *local_rgb = NULL;
if (!out_buf) {
perror("render_thread malloc");
@ -78,9 +80,9 @@ void *render_thread(void *arg) {
pthread_mutex_unlock(&sf->lock);
// Process frame outside locked state
int len = grayscale_to_ascii(sf->buf[read_idx], local_rgb, sf->width,
sf->height, sf->ascii_w, sf->ascii_h, out_buf,
out_size, &sf->opts);
int len =
grayscale_to_ascii(sf->buf[read_idx], local_rgb, sf->width, sf->height,
braille_w, braille_h, out_buf, out_size, &sf->opts);
if (len > 0) {
write(STDOUT_FILENO, "\033[H", 3); // cursor to top-left
@ -92,11 +94,10 @@ void *render_thread(void *arg) {
pthread_mutex_unlock(&sf->lock);
// Cleanup memory
free(out_buf);
if (local_rgb) {
free(local_rgb);
}
// local_rgb is NULL in this path (see comment above); free is a no-op but
// safe
free(local_rgb);
return NULL;
}