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	blind-norm.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	---
	blind-norm.c (1695B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #ifndef TYPE
	3 #include "common.h"
	4
	5 USAGE("[-axyz]")
	6
	7 static int skip_a = 0;
	8 static int skip_x = 0;
	9 static int skip_y = 0;
	10 static int skip_z = 0;
	11
	12 #define FILE "blind-norm.c"
	13 #include "define-functions.h"
	14
	15 int
	16 main(int argc, char *argv[])
	17 {
	18 struct stream stream;
	19 void (process)(struct stream stream);
	20
	21 ARGBEGIN {
	22 case 'a':
	23 skip_a = 1;
	24 break;
	25 case 'x':
	26 skip_x = 1;
	27 break;
	28 case 'y':
	29 skip_y = 1;
	30 break;
	31 case 'z':
	32 skip_z = 1;
	33 break;
	34 default:
	35 usage();
	36 } ARGEND;
	37
	38 if (argc)
	39 usage();
	40
	41 eopen_stream(&stream, NULL);
	42
	43 SELECT_PROCESS_FUNCTION(&stream);
	44 CHECK_ALPHA_CHAN(&stream);
	45 CHECK_N_CHAN(&stream, 4, 4);
	46
	47 fprint_stream_head(stdout, &stream);
	48 efflush(stdout, "<stdout>");
	49 process(&stream);
	50 return 0;
	51 }
	52
	53 #else
	54
	55 static void
	56 PROCESS(struct stream *stream)
	57 {
	58 size_t i, n;
	59 TYPE x, y, z, a, norm;
	60 do {
	61 n = stream->ptr / stream->pixel_size;
	62 for (i = 0; i < n; i++) {
	63 x = ((TYPE )(stream->buf))[4 i + 0];
	64 y = ((TYPE )(stream->buf))[4 i + 1];
	65 z = ((TYPE )(stream->buf))[4 i + 2];
	66 a = ((TYPE )(stream->buf))[4 i + 3];
	67 norm = sqrt(x * x + y * y + z * z + a * a);
	68 if (!skip_x)
	69 ((TYPE )(stream->buf))[4 i + 0] = nor…
	70 if (!skip_y)
	71 ((TYPE )(stream->buf))[4 i + 1] = nor…
	72 if (!skip_z)
	73 ((TYPE )(stream->buf))[4 i + 2] = nor…
	74 if (!skip_a)
	75 ((TYPE )(stream->buf))[4 i + 3] = nor…
	76 }
	77 n *= stream->pixel_size;
	78 ewriteall(STDOUT_FILENO, stream->buf, n, "<stdout>");
	79 memmove(stream->buf, stream->buf + n, stream->ptr -= n);
	80 } while (eread_stream(stream, SIZE_MAX));
	81 if (stream->ptr)
	82 eprintf("%s: incomplete frame\n", stream->file);
	83 }
	84
	85 #endif