add ff2jpg tool, convert farbfeld images to RGB JPEG - farbfeld - suckless image format with conversion tools
(HTM) git clone git://git.suckless.org/farbfeld
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
(DIR) commit 34e9cba51f5149da0670b32101e23b4d76e20d61
(DIR) parent 7f295f8c100a504c305d537bd3fde6492f15ef7a
(HTM) Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Thu, 24 Mar 2016 19:17:48 +0100
add ff2jpg tool, convert farbfeld images to RGB JPEG
Diffstat:
M LICENSE | 2 +-
M Makefile | 4 ++--
A ff2jpg.1 | 56 +++++++++++++++++++++++++++++++
A ff2jpg.c | 151 +++++++++++++++++++++++++++++++
4 files changed, 210 insertions(+), 3 deletions(-)
---
(DIR) diff --git a/LICENSE b/LICENSE
@@ -15,5 +15,5 @@ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
(c) 2014-2015 Dimitris Papastamos <sin@2f30.org>
-(c) 2014-2015 Hiltjo Posthuma <hiltjo@codemadness.org>
+(c) 2014-2016 Hiltjo Posthuma <hiltjo@codemadness.org>
(c) 2015 Willy Goiffon <willy@mailoo.org>
(DIR) diff --git a/Makefile b/Makefile
@@ -2,7 +2,7 @@
# See LICENSE file for copyright and license details
include config.mk
-BIN = png2ff ff2png jpg2ff ff2ppm
+BIN = png2ff ff2png jpg2ff ff2jpg ff2ppm
SRC = ${BIN:=.c}
HDR = arg.h
MAN1 = 2ff.1 ${BIN:=.1}
@@ -15,7 +15,7 @@ png2ff ff2png:
@${CC} -o $@ ${CFLAGS} ${CPPFLAGS} -L${PNGLIB} -lpng -I${PNGINC} \
${LDFLAGS} $@.c
-jpg2ff:
+jpg2ff ff2jpg:
@echo CC $@
@${CC} -o $@ ${CFLAGS} ${CPPFLAGS} -L${JPGLIB} -ljpeg -I${JPGINC} \
${LDFLAGS} $@.c
(DIR) diff --git a/ff2jpg.1 b/ff2jpg.1
@@ -0,0 +1,56 @@
+.Dd 2016-03-23
+.Dt FF2JPG 1
+.Os suckless.org
+.Sh NAME
+.Nm ff2jpg
+.Nd convert farbfeld to JPEG
+.Sh SYNOPSIS
+.Nm
+.Op Fl b Ar color
+.Op Fl o
+.Op Fl q Ar quality
+.Sh DESCRIPTION
+.Nm
+reads a
+.Xr farbfeld 5
+image from stdin, converts it to a JPEG image (RGB) and writes the result to
+stdout.
+.Pp
+In case of an error
+.Nm
+writes a diagnostic message to stderr.
+.Sh OPTIONS
+.Bl -tag -width Ds
+.It Fl b Ar color
+.Ar color
+to mix with the background alpha channel, the default is white.
+.Pp
+The following formats are supported:
+"#rrggbb", "#rrrrggggbbbb" and the short-form "#rgb" which expands to "#rrggbb".
+.It Fl o
+Optimize Huffman table (smaller file, but slow compression).
+.It Fl q Ar quality
+set JPEG output
+.Ar quality
+(range 0-100), the default is 85.
+.El
+.Sh EXIT STATUS
+.Bl -tag -width Ds
+.It 0
+Image processed successfully.
+.It 1
+An error occurred.
+.El
+.Sh EXAMPLES
+$
+png2ff < test.png |
+.Nm
+-b '#00ff00' -q 85 > test.jpg
+.Sh SEE ALSO
+.Xr 2ff 1 ,
+.Xr bunzip2 1 ,
+.Xr bzip2 1 ,
+.Xr png2ff 1 ,
+.Xr farbfeld 5
+.Sh AUTHORS
+.An Hiltjo Posthuma Aq Mt hiltjo@codemadness.org
(DIR) diff --git a/ff2jpg.c b/ff2jpg.c
@@ -0,0 +1,151 @@
+/* See LICENSE file for copyright and license details. */
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <jpeglib.h>
+
+#include "arg.h"
+
+char *argv0;
+
+METHODDEF(void)
+jpeg_error(j_common_ptr js)
+{
+ fprintf(stderr, "%s: libjpeg: ", argv0);
+ (*js->err->output_message)(js);
+ exit(1);
+}
+
+static void
+usage(void)
+{
+ fprintf(stderr, "usage: %s [-b #rrggbb] [-o] [-q quality]\n", argv0);
+ exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+ JSAMPROW row_pointer[1]; /* pointer to a single row */
+ struct jpeg_compress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+ size_t rowlen;
+ uint64_t a;
+ uint32_t hdr[4], width, height, i, j, k, l;
+ uint16_t *row, mask[3] = { 0xffff, 0xffff, 0xffff };
+ uint8_t *rowout;
+ char *color, colfmt[] = "%#x%#x%#x";
+ unsigned int collen, col[3], colfac, quality = 85, optimize = 0;
+
+ argv0 = argv[0];
+ ARGBEGIN {
+ case 'b':
+ color = EARGF(usage());
+ if (color[0] == '#') {
+ color++;
+ }
+ collen = strlen(color);
+ if (collen != 3 && collen != 6 && collen != 12) {
+ usage();
+ }
+ colfmt[1] = colfmt[4] = colfmt[7] = ((collen / 3) + '0');
+ if (sscanf(color, colfmt, col, col + 1, col + 2) != 3) {
+ usage();
+ }
+ /* UINT16_MAX / 255 = 257; UINT16_MAX / 15 = 4369 */
+ colfac = (collen == 3) ? 4369 : (collen == 6) ? 257 : 1;
+ for (i = 0; i < 3; i++) {
+ mask[i] = col[i] * colfac;
+ }
+ break;
+ case 'o':
+ optimize = 1;
+ break;
+ case 'q':
+ if ((quality = atoi(EARGF(usage()))) > 100)
+ usage();
+ break;
+ default:
+ usage();
+ } ARGEND
+
+ if (argc)
+ usage();
+
+ /* header */
+ if (fread(hdr, sizeof(*hdr), 4, stdin) != 4) {
+ fprintf(stderr, "%s: fread: %s\n", argv0, strerror(errno));
+ return 1;
+ }
+ if (memcmp("farbfeld", hdr, sizeof("farbfeld") - 1)) {
+ fprintf(stderr, "%s: invalid magic value\n", argv0);
+ return 1;
+ }
+ if (!(width = ntohl(hdr[2]))) {
+ fprintf(stderr, "%s: invalid width: zero\n", argv0);
+ return 1;
+ }
+ if (!(height = ntohl(hdr[3]))) {
+ fprintf(stderr, "%s: invalid height: zero\n", argv0);
+ return 1;
+ }
+
+ if (width > SIZE_MAX / ((sizeof("RGBA") - 1) * sizeof(uint16_t))) {
+ fprintf(stderr, "%s: row length integer overflow\n", argv0);
+ return 1;
+ }
+ rowlen = width * (sizeof("RGBA") - 1);
+ if (!(row = malloc(rowlen * sizeof(uint16_t)))) {
+ fprintf(stderr, "%s: malloc: %s\n", argv0, strerror(errno));
+ return 1;
+ }
+ if (!(rowout = malloc(width * (sizeof("RGB") - 1) * sizeof(uint8_t)))) {
+ fprintf(stderr, "%s: malloc: %s\n", argv0, strerror(errno));
+ return 1;
+ }
+ row_pointer[0] = rowout;
+
+ jerr.error_exit = jpeg_error;
+
+ jpeg_create_compress(&cinfo);
+ cinfo.err = jpeg_std_error(&jerr);
+ jpeg_stdio_dest(&cinfo, stdout);
+ cinfo.image_width = width;
+ cinfo.image_height = height;
+ cinfo.input_components = 3; /* color components per pixel */
+ cinfo.in_color_space = JCS_RGB; /* output color space */
+ jpeg_set_defaults(&cinfo);
+ if (optimize)
+ cinfo.optimize_coding = TRUE;
+ jpeg_set_quality(&cinfo, quality, TRUE);
+
+ jpeg_start_compress(&cinfo, TRUE);
+
+ /* write rows */
+ for (i = 0; i < height; ++i) {
+ if (fread(row, sizeof(uint16_t), rowlen, stdin) != rowlen) {
+ fprintf(stderr, "%s: fread: %s\n", argv0, strerror(errno));
+ return 1;
+ }
+ for (j = 0, k = 0; j < rowlen; j += 4, k += 3) {
+ a = ntohs(row[j + 3]);
+ for (l = 0; l < 3; l++) {
+ rowout[k + l] = (a * ntohs(row[j + l]) +
+ (65535 - a) * mask[l]) /
+ (257 * 65535);
+ }
+ }
+ jpeg_write_scanlines(&cinfo, row_pointer, 1);
+ }
+
+ jpeg_finish_compress(&cinfo);
+ jpeg_destroy_compress(&cinfo);
+
+ return 0;
+}