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	blind-triangular-wave.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	blind-triangular-wave.c (1568B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #ifndef TYPE
	3 #include "common.h"
	4
	5 USAGE("[-es]")
	6
	7 static int equal = 0;
	8 static int spiral = 0;
	9
	10 #define FILE "blind-triangular-wave.c"
	11 #include "define-functions.h"
	12
	13 int
	14 main(int argc, char *argv[])
	15 {
	16 struct stream stream;
	17 void (process)(struct stream stream);
	18
	19 ARGBEGIN {
	20 case 'e':
	21 equal = 1;
	22 break;
	23 case 's':
	24 spiral = 1;
	25 break;
	26 default:
	27 usage();
	28 } ARGEND;
	29
	30 if (argc)
	31 usage();
	32
	33 eopen_stream(&stream, NULL);
	34
	35 SELECT_PROCESS_FUNCTION(&stream);
	36 fprint_stream_head(stdout, &stream);
	37 efflush(stdout, "<stdout>");
	38 process(&stream);
	39 return 0;
	40 }
	41
	42 #else
	43
	44 static void
	45 PROCESS(struct stream *stream)
	46 {
	47 size_t i, j, n;
	48 TYPE v, *p;
	49 do {
	50 if (equal) {
	51 n = stream->ptr / stream->pixel_size;
	52 for (i = 0; i < n; i++) {
	53 p = (TYPE )(stream->buf) + i stream->…
	54 v = posmod(*p, (TYPE)2);
	55 v = v > 1 ? 2 - v : v;
	56 if (spiral)
	57 v = (v > (TYPE)0.5 ? 1 - v : v) …
	58 for (j = 0; j < stream->n_chan; j++)
	59 p[j] = v;
	60 }
	61 n *= stream->pixel_size;
	62 } else {
	63 n = stream->ptr / stream->chan_size;
	64 for (i = 0; i < n; i++) {
	65 p = (TYPE *)(stream->buf) + i;
	66 v = posmod(*p, (TYPE)2);
	67 v = v > 1 ? 2 - v : v;
	68 if (spiral)
	69 v = (v > (TYPE)0.5 ? 1 - v : v) …
	70 *p = v;
	71 }
	72 n *= stream->chan_size;
	73 }
	74 ewriteall(STDOUT_FILENO, stream->buf, n, "<stdout>");
	75 memmove(stream->buf, stream->buf + n, stream->ptr -= n);
	76 } while (eread_stream(stream, SIZE_MAX));
	77 if (stream->ptr)
	78 eprintf("%s: incomplete frame\n", stream->file);
	79 }
	80
	81 #endif