Soo many features added

weeee so much efficiencyyyy

1 files changed, 77 insertions, 0 deletions

diff --git a/.repos/farbfeld/ff2png.c b/.repos/farbfeld/ff2png.c
new file mode 100644
index 0000000..193b375
--- /dev/null
+++ b/.repos/farbfeld/ff2png.c
@@ -0,0 +1,77 @@
+/* See LICENSE file for copyright and license details. */
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <png.h>
+
+#include "util.h"
+
+static void
+png_err(png_struct *pngs, const char *msg)
+{
+	(void)pngs;
+	die("libpng: %s", msg);
+}
+
+static void
+png_setup_writer(png_struct **s, png_info **i, uint32_t w, uint32_t h)
+{
+	*s = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, png_err, NULL);
+	*i = png_create_info_struct(*s);
+
+	if (!*s || !*i) {
+		die("Failed to initialize libpng");
+	}
+
+	png_init_io(*s, stdout);
+	png_set_IHDR(*s, *i, w, h, 16, PNG_COLOR_TYPE_RGB_ALPHA,
+	             PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
+	             PNG_FILTER_TYPE_BASE);
+	png_write_info(*s, *i);
+}
+
+static void
+usage(void)
+{
+	die("usage: %s", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	png_struct *pngs;
+	png_info *pngi;
+	size_t rowlen;
+	uint32_t width, height, i;
+	uint16_t *row;
+
+	/* arguments */
+	argv0 = argv[0], argc--, argv++;
+
+	if (argc) {
+		usage();
+	}
+
+	/* prepare */
+	ff_read_header(&width, &height);
+	png_setup_writer(&pngs, &pngi, width, height);
+	row = ereallocarray(NULL, width, (sizeof("RGBA") - 1) * sizeof(uint16_t));
+	rowlen = width * (sizeof("RGBA") - 1);
+
+	/* write data */
+	for (i = 0; i < height; ++i) {
+		efread(row, sizeof(uint16_t), rowlen, stdin);
+		png_write_row(pngs, (uint8_t *)row);
+	}
+
+	/* clean up */
+	png_write_end(pngs, NULL);
+	png_destroy_write_struct(&pngs, NULL);
+
+	return fshut(stdout, "<stdout>");
+}