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Add README.sixel. W3M_IMG2SIXEL environmental variable enables to specify options of img2sixel.

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This commit is contained in:
Araki Ken
2014-11-16 04:07:05 +09:00
committed by Tatsuya Kinoshita
parent 982a8feab0
commit 2e8def7ab6
2 changed files with 62 additions and 20 deletions
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27
doc/README.sixel Normal file
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@@ -0,0 +1,27 @@
Sixel support of w3m
2014/11/05
K. Araki
Introduction
This is the extension for w3m to show inline images by sixel graphics.
Requirements
Install 'img2sixel' command provided by libsixel project.
(https://github.com/saitoha/libsixel)
Build
$ ./configure --enable-image ...
$ make
$ make install
Usage
$ w3m -sixel http://...
You can specify options of 'img2sixel' command by "W3M_IMG2SIXEL"
environmental variable.
$ W3M_IMG2SIXEL="img2sixel -d atkinson" w3m -sixel http://...

55
terms.c
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@@ -596,7 +596,9 @@ put_image_sixel(char *url, int x, int y, int w, int h, int sx, int sy, int sw, i
prevstop = mySignal(SIGTSTP, SIG_IGN);
if ((pid = fork()) == 0) {
char *argv[12];
char *env;
int n = 0;
char *argv[20];
char digit[2][11+1];
char clip[44+3+1];
Str str_url;
@@ -611,28 +613,41 @@ put_image_sixel(char *url, int x, int y, int w, int h, int sx, int sy, int sw, i
}
ttymode_set(ISIG, 0);
argv[0] = "img2sixel";
argv[1] = "-l";
argv[2] = do_anim ? "auto" : "disable";
argv[3] = "-w";
sprintf(digit[0], "%d", w*pixel_per_char_i);
argv[4] = digit[0];
argv[5] = "-h";
sprintf(digit[1], "%d", h*pixel_per_line_i);
argv[6] = digit[1];
argv[7] = "-c";
sprintf(clip, "%dx%d+%d+%d", sw*pixel_per_char_i, sh*pixel_per_line_i,
sx*pixel_per_char_i, sy*pixel_per_line_i);
argv[8] = clip;
argv[9] = url;
if (getenv("TERM") && strcmp(getenv("TERM"), "screen") == 0 &&
(!getenv("SCREEN_VARIANT") || strcmp(getenv("SCREEN_VARIANT"), "sixel") != 0)) {
argv[10] = "-P";
argv[11] = NULL;
if ((env = getenv("W3M_IMG2SIXEL"))) {
char *p;
env = Strnew_charp(env)->ptr;
while (n < 8 && (p = strchr(env, ' '))) {
*p = '\0';
if (*env != '\0') {
argv[n++] = env;
}
env = p+1;
}
if (*env != '\0') {
argv[n++] = env;
}
}
else {
argv[10] = NULL;
argv[n++] = "img2sixel";
}
argv[n++] = "-l";
argv[n++] = do_anim ? "auto" : "disable";
argv[n++] = "-w";
sprintf(digit[0], "%d", w*pixel_per_char_i);
argv[n++] = digit[0];
argv[n++] = "-h";
sprintf(digit[1], "%d", h*pixel_per_line_i);
argv[n++] = digit[1];
argv[n++] = "-c";
sprintf(clip, "%dx%d+%d+%d", sw*pixel_per_char_i, sh*pixel_per_line_i,
sx*pixel_per_char_i, sy*pixel_per_line_i);
argv[n++] = clip;
argv[n++] = url;
if (getenv("TERM") && strcmp(getenv("TERM"), "screen") == 0 &&
(!getenv("SCREEN_VARIANT") || strcmp(getenv("SCREEN_VARIANT"), "sixel") != 0)) {
argv[n++] = "-P";
}
argv[n++] = NULL;
execvp(argv[0],argv);
exit(0);
}