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-rw-r--r--terms.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/terms.c b/terms.c
index 672262c..79996f1 100644
--- a/terms.c
+++ b/terms.c
@@ -12,6 +12,7 @@
#include <unistd.h>
#include "config.h"
#include <string.h>
+#include <sys/wait.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
@@ -466,6 +467,260 @@ writestr(char *s)
#define MOVE(line,column) writestr(tgoto(T_cm,column,line));
+void
+put_image_osc5379(char *url, int x, int y, int w, int h, int sx, int sy, int sw, int sh, int n_terminal_image)
+{
+ Str buf;
+ char *size ;
+
+ if (w > 0 && h > 0)
+ size = Sprintf("%dx%d",w,h)->ptr;
+ else
+ size = "";
+
+ MOVE(y,x);
+ buf = Sprintf("\x1b]5379;show_picture %s %s %dx%d+%d+%d\x07",url,size,sw,sh,sx,sy);
+ writestr(buf->ptr);
+ MOVE(Currentbuf->cursorY,Currentbuf->cursorX);
+}
+
+static void
+save_gif(const char *path, u_char *header, size_t header_size, u_char *body, size_t body_size)
+{
+ int fd;
+
+ if ((fd = open(path, O_WRONLY|O_CREAT, 0600)) >= 0) {
+ write(fd, header, header_size) ;
+ write(fd, body, body_size) ;
+ write(fd, "\x3b" , 1) ;
+ close(fd) ;
+ }
+}
+
+static u_char *
+skip_gif_header(u_char *p)
+{
+ /* Header */
+ p += 10;
+
+ if (*(p) & 0x80) {
+ p += (3 * (2 << ((*p) & 0x7)));
+ }
+ p += 3;
+
+ return p;
+}
+
+static Str
+save_first_animation_frame(const char *path)
+{
+ int fd;
+ struct stat st;
+ u_char *header;
+ size_t header_size;
+ u_char *body;
+ u_char *p;
+ ssize_t len;
+ Str new_path;
+
+ new_path = Strnew_charp(path);
+ Strcat_charp(new_path, "-1");
+ if (stat(new_path->ptr, &st) == 0) {
+ return new_path;
+ }
+
+ if ((fd = open( path, O_RDONLY)) < 0) {
+ return NULL;
+ }
+
+ if (fstat( fd, &st) != 0 || ! (header = GC_malloc( st.st_size))){
+ close( fd);
+ return NULL;
+ }
+
+ len = read(fd, header, st.st_size);
+ close(fd);
+
+ /* Header */
+
+ if (len != st.st_size || strncmp(header, "GIF89a", 6) != 0) {
+ return NULL;
+ }
+
+ p = skip_gif_header(header);
+ header_size = p - header;
+
+ /* Application Extension */
+ if (p[0] == 0x21 && p[1] == 0xff) {
+ p += 19;
+ }
+
+ /* Other blocks */
+ body = NULL;
+ while (p + 2 < header + st.st_size) {
+ if (*(p++) == 0x21 && *(p++) == 0xf9 && *(p++) == 0x04) {
+ if( body) {
+ /* Graphic Control Extension */
+ save_gif(new_path->ptr, header, header_size, body, p - 3 - body);
+ return new_path;
+ }
+ else {
+ /* skip the first frame. */
+ }
+ body = p - 3;
+ }
+ }
+
+ return NULL;
+}
+
+void ttymode_set(int mode, int imode);
+void ttymode_reset(int mode, int imode);
+
+void
+put_image_sixel(char *url, int x, int y, int w, int h, int sx, int sy, int sw, int sh, int n_terminal_image)
+{
+ pid_t pid;
+ int do_anim;
+ MySignalHandler(*volatile previntr) (SIGNAL_ARG);
+ MySignalHandler(*volatile prevquit) (SIGNAL_ARG);
+ MySignalHandler(*volatile prevstop) (SIGNAL_ARG);
+
+ MOVE(y,x);
+ flush_tty();
+
+ do_anim = (n_terminal_image == 1 && x == 0 && y == 0 && sx == 0 && sy == 0);
+
+ previntr = mySignal(SIGINT, SIG_IGN);
+ prevquit = mySignal(SIGQUIT, SIG_IGN);
+ prevstop = mySignal(SIGTSTP, SIG_IGN);
+
+ if ((pid = fork()) == 0) {
+ char *env;
+ int n = 0;
+ char *argv[20];
+ char digit[2][11+1];
+ char clip[44+3+1];
+ Str str_url;
+
+ close(STDERR_FILENO); /* Don't output error message. */
+ if (do_anim) {
+ writestr("\x1b[?80h");
+ }
+ else if (!strstr(url, "://") && strcmp(url+strlen(url)-4, ".gif") == 0 &&
+ (str_url = save_first_animation_frame(url))) {
+ url = str_url->ptr;
+ }
+ ttymode_set(ISIG, 0);
+
+ 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[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);
+ }
+ else if (pid > 0) {
+ int status;
+ waitpid(pid, &status, 0);
+ ttymode_reset(ISIG, 0);
+ mySignal(SIGINT, previntr);
+ mySignal(SIGQUIT, prevquit);
+ mySignal(SIGTSTP, prevstop);
+ if (do_anim) {
+ writestr("\x1b[?80l");
+ }
+ }
+
+ MOVE(Currentbuf->cursorY,Currentbuf->cursorX);
+}
+
+int
+get_pixel_per_cell(int *ppc, int *ppl)
+{
+ fd_set rfd;
+ struct timeval tval;
+ char buf[100];
+ char *p;
+ ssize_t len;
+ ssize_t left;
+ int wp,hp,wc,hc;
+ int i;
+
+#ifdef TIOCGWINSZ
+ struct winsize ws;
+ if (ioctl(tty, TIOCGWINSZ, &ws) == 0 && ws.ws_ypixel > 0 && ws.ws_row > 0 &&
+ ws.ws_xpixel > 0 && ws.ws_col > 0) {
+ *ppc = ws.ws_xpixel / ws.ws_col;
+ *ppl = ws.ws_ypixel / ws.ws_row;
+ return 1;
+ }
+#endif
+
+ fputs("\x1b[14t\x1b[18t",ttyf); flush_tty();
+
+ p = buf;
+ left = sizeof(buf) - 1;
+ for (i = 0; i < 10; i++) {
+ tval.tv_usec = 200000; /* 0.2 sec * 10 */
+ tval.tv_sec = 0;
+ FD_ZERO(&rfd);
+ FD_SET(tty,&rfd);
+ if (select(tty+1,&rfd,NULL,NULL,&tval) <= 0 || ! FD_ISSET(tty,&rfd))
+ continue;
+
+ if ((len = read(tty,p,left)) <= 0)
+ continue;
+ p[len] = '\0';
+
+ if (sscanf(buf,"\x1b[4;%d;%dt\x1b[8;%d;%dt",&hp,&wp,&hc,&wc) == 4) {
+ if (wp > 0 && wc > 0 && hp > 0 && hc > 0) {
+ *ppc = wp / wc;
+ *ppl = hp / hc;
+ return 1;
+ }
+ else {
+ return 0;
+ }
+ }
+ p += len;
+ left -= len;
+ }
+
+ return 0;
+}
+
#ifdef USE_MOUSE
#define W3M_TERM_INFO(name, title, mouse) name, title, mouse
#define NEED_XTERM_ON (1)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 07:48:09 +0000