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	Add blind-get-colours - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	---
	commit 975a02fba76fce7526278ea09a27cc0aae608d30
	parent 6f4d55793f88540d1b1abd7410e43da83993ad6a
	Author: Mattias Andrée <[email protected]>
	Date: Wed, 12 Jul 2017 02:09:03 +0200

	Add blind-get-colours

	Signed-off-by: Mattias Andrée <[email protected]>

	Diffstat:
	M Makefile \| 1 +
	M README \| 3 +++
	A man/blind-get-colours.1 \| 15 +++++++++++++++
	M man/blind-repeat-tessellation.1 \| 3 ++-
	M man/blind.7 \| 3 +++
	A src/blind-get-colours.c \| 88 +++++++++++++++++++++++++++++…

	6 files changed, 112 insertions(+), 1 deletion(-)
	---
	diff --git a/Makefile b/Makefile
	@@ -33,6 +33,7 @@ BIN =\
	blind-from-text\
	blind-from-video\
	blind-gauss-blur\
	+ blind-get-colours\
	blind-interleave\
	blind-invert-luma\
	blind-linear-gradient\
	diff --git a/README b/README
	@@ -99,6 +99,9 @@ UTILITIES
	blind-gauss-blur(1)
	Apply Gaussian blur to a video

	+ blind-get-colours(1)
	+ Get a frame with all colours from a video
	+
	blind-interleave(1)
	Framewise interleave videos

	diff --git a/man/blind-get-colours.1 b/man/blind-get-colours.1
	@@ -0,0 +1,15 @@
	+.TH BLIND-GET-COLOURS 1 blind
	+.SH NAME
	+blind-get-colours - Get a frame with all colours from a video
	+.SH SYNOPSIS
	+.B blind-get-colours
	+.SH DESCRIPTION
	+.B blind-get-colours
	+reads a video from stdin and prints a single-frame
	+video to stdout contain all colours from the video.
	+.SH SEE ALSO
	+.BR blind (7),
	+.BR blind-repeat-tessellation (1)
	+.SH AUTHORS
	+Mattias Andrée
	+.RI < [email protected] >
	diff --git a/man/blind-repeat-tessellation.1 b/man/blind-repeat-tessellation.1
	@@ -28,7 +28,8 @@ requires enough free memory to load one full frame of
	the video from stdin into memory. A frame requires 32
	bytes per pixel it contains.
	.SH SEE ALSO
	-.BR blind (7)
	+.BR blind (7),
	+.BR blind-get-colours (1)
	.SH AUTHORS
	Mattias Andrée
	.RI < [email protected] >
	diff --git a/man/blind.7 b/man/blind.7
	@@ -115,6 +115,9 @@ Converts a regular, cooked video to a blind video
	.BR blind-gauss-blur (1)
	Apply Gaussian blur to a video
	.TP
	+.BR blind-get-colours (1)
	+Get a frame with all colours from a video
	+.TP
	.BR blind-interleave (1)
	Framewise interleave videos
	.TP
	diff --git a/src/blind-get-colours.c b/src/blind-get-colours.c
	@@ -0,0 +1,88 @@
	+/* See LICENSE file for copyright and license details. */
	+#include "common.h"
	+
	+USAGE("")
	+
	+
	+static size_t width;
	+
	+
	+static int
	+pixcmp(const void a, const void b)
	+{
	+ return memcmp(a, b, width);
	+}
	+
	+
	+static size_t
	+unique(char *base, size_t n)
	+{
	+ size_t i, r = 1;
	+ for (i = 1; i < n; i++)
	+ if (pixcmp(base + (r - 1) * width, base + i * width) && r++ !=…
	+ memcpy(base + (r - 1) * width, base + i * width, width…
	+ return r;
	+}
	+
	+
	+static size_t
	+merge(char *sink, size_t n, char new, size_t m, size_t *siz)
	+{
	+ size_t i, j;
	+ int c;
	+ for (i = j = 0; i < n && j < m; i++) {
	+ c = pixcmp(sink + i width, new + j * width);
	+ if (c > 0) {
	+ if (n == *siz) {
	+ siz = n ? n 2 : 8;
	+ sink = erealloc2(sink, *siz, width);
	+ }
	+ n += 1;
	+ memmove(sink + (i + 1) width, sink + i width, (n…
	+ memcpy(sink + i width, new + j * width, width);
	+ }
	+ j += c >= 0;
	+ }
	+ m -= j;
	+ if (n + m > *siz) {
	+ *siz = n + m;
	+ sink = erealloc2(sink, *siz, width);
	+ }
	+ memcpy(sink + n width, new + j * width, m * width);
	+ return n + m;
	+}
	+
	+
	+int
	+main(int argc, char *argv[])
	+{
	+ struct stream stream;
	+ char *colours = NULL;
	+ size_t ptr = 0, siz = 0;
	+ size_t n, m;
	+
	+ UNOFLAGS(argc);
	+
	+ eopen_stream(&stream, NULL);
	+ width = stream.pixel_size;
	+
	+ do {
	+ n = stream.ptr / width;
	+
	+ qsort(stream.buf, n, width, pixcmp);
	+ m = unique(stream.buf, n);
	+ ptr = merge(&colours, ptr, stream.buf, m, &siz);
	+
	+ n *= width;
	+ memmove(stream.buf, stream.buf + n, stream.ptr -= n);
	+ } while (eread_stream(&stream, SIZE_MAX));
	+
	+ stream.frames = 1;
	+ stream.width = ptr;
	+ stream.height = 1;
	+ fprint_stream_head(stdout, &stream);
	+ efflush(stdout, "<stdout>");
	+ ewriteall(STDOUT_FILENO, colours, ptr * width, "<stdout>");
	+
	+ return 0;
	+}