New patch 450_remoteimg.path to support remote imaging and sixel graphics

2 files changed, 937 insertions, 0 deletions

diff --git a/debian/patches/450_remoteimg.path b/debian/patches/450_remoteimg.path
new file mode 100644
index 0000000..0298e46
--- /dev/null
+++ b/debian/patches/450_remoteimg.path
@@ -0,0 +1,936 @@
+Subject: Support OSC 5379 remote imaging and sixel graphics
+Author: Araki Ken <arakiken@users.sf.net>
+Origin: https://bitbucket.org/arakiken/w3m/branch/remoteimg
+
+diff --git a/display.c b/display.c
+index 2fe1183..d4f336a 100644
+--- a/display.c
++++ b/display.c
+@@ -487,7 +487,7 @@ displayBuffer(Buffer *buf, int mode)
+     term_title(conv_to_system(buf->buffername));
+     refresh();
+ #ifdef USE_IMAGE
+-    if (activeImage && displayImage && buf->img) {
++    if (activeImage && displayImage && buf->img && buf->image_loaded) {
+ 	drawImage();
+     }
+ #endif
+@@ -521,7 +521,15 @@ drawAnchorCursor0(Buffer *buf, AnchorList *al, int hseq, int prevhseq,
+ 		break;
+ 	}
+ 	if (hseq >= 0 && an->hseq == hseq) {
++	    int start_pos = an->start.pos;
++	    int end_pos = an->end.pos;
+ 	    for (i = an->start.pos; i < an->end.pos; i++) {
++	        if (enable_inline_image && (l->propBuf[i] & PE_IMAGE)) {
++		    if (start_pos == i)
++			start_pos = i + 1;
++		    else if (end_pos == an->end.pos)
++		        end_pos = i - 1;
++		}
+ 		if (l->propBuf[i] & (PE_IMAGE | PE_ANCHOR | PE_FORM)) {
+ 		    if (active)
+ 			l->propBuf[i] |= PE_ACTIVE;
+@@ -529,9 +537,9 @@ drawAnchorCursor0(Buffer *buf, AnchorList *al, int hseq, int prevhseq,
+ 			l->propBuf[i] &= ~PE_ACTIVE;
+ 		}
+ 	    }
+-	    if (active)
++	    if (active && start_pos < end_pos)
+ 		redrawLineRegion(buf, l, l->linenumber - tline + buf->rootY,
+-				 an->start.pos, an->end.pos);
++				 start_pos, end_pos);
+ 	}
+ 	else if (prevhseq >= 0 && an->hseq == prevhseq) {
+ 	    if (active)
+@@ -855,14 +863,16 @@ redrawLineImage(Buffer *buf, Line *l, int i)
+ 		y = (int)(i * pixel_per_line);
+ 		sx = (int)((rcol - COLPOS(l, a->start.pos)) * pixel_per_char);
+ 		sy = (int)((l->linenumber - image->y) * pixel_per_line);
+-		if (sx == 0 && x + image->xoffset >= 0)
+-		    x += image->xoffset;
+-		else
+-		    sx -= image->xoffset;
+-		if (sy == 0 && y + image->yoffset >= 0)
+-		    y += image->yoffset;
+-		else
+-		    sy -= image->yoffset;
++		if (! enable_inline_image) {
++		    if (sx == 0 && x + image->xoffset >= 0)
++			x += image->xoffset;
++		    else
++			sx -= image->xoffset;
++		    if (sy == 0 && y + image->yoffset >= 0)
++			y += image->yoffset;
++		    else
++			sy -= image->yoffset;
++		}
+ 		if (image->width > 0)
+ 		    w = image->width - sx;
+ 		else
+diff --git a/doc/README.sixel b/doc/README.sixel
+new file mode 100644
+index 0000000..588afc4
+--- /dev/null
++++ b/doc/README.sixel
+@@ -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://...
+diff --git a/etc.c b/etc.c
+index 8fe1215..dcc6edd 100644
+--- a/etc.c
++++ b/etc.c
+@@ -1365,7 +1365,13 @@ setup_child(int child, int i, int f)
+     if (!child)
+ 	SETPGRP();
+ #endif /* __MINGW32_VERSION */
++    /*
++     * I don't know why but close_tty() sometimes interrupts loadGeneralFile() in loadImage()
++     * and corrupt image data can be cached in ~/.w3m.
++     */
++#if 0
+     close_tty();
++#endif
+     close_all_fds_except(i, f);
+     QuietMessage = TRUE;
+     fmInitialized = FALSE;
+diff --git a/file.c b/file.c
+index 1e363d0..709a0c1 100644
+--- a/file.c
++++ b/file.c
+@@ -3345,8 +3345,14 @@ process_img(struct parsed_tag *tag, int width)
+ 	    if (i < 0)
+ 		i = pixel_per_line;
+ 	}
+-	nw = (w > 3) ? (int)((w - 3) / pixel_per_char + 1) : 1;
+-	ni = (i > 3) ? (int)((i - 3) / pixel_per_line + 1) : 1;
++	if (enable_inline_image) {
++	    nw = (w > 1) ? ((w - 1) / pixel_per_char_i + 1) : 1 ;
++	    ni = (i > 1) ? ((i - 1) / pixel_per_line_i + 1) : 1 ;
++	}
++	else {
++	    nw = (w > 3) ? (int)((w - 3) / pixel_per_char + 1) : 1;
++	    ni = (i > 3) ? (int)((i - 3) / pixel_per_line + 1) : 1;
++	}
+ 	Strcat(tmp,
+ 	       Sprintf("<pre_int><img_alt hseq=\"%d\" src=\"", cur_iseq++));
+ 	pre_int = TRUE;
+@@ -3377,19 +3383,21 @@ process_img(struct parsed_tag *tag, int width)
+ 	if (i0 >= 0)
+ 	    Strcat(tmp, Sprintf(" height=%d", i0));
+ 	switch (align) {
++	case ALIGN_MIDDLE:
++	    if (!enable_inline_image) {
++		top = ni / 2;
++		bottom = top;
++		if (top * 2 == ni)
++		    yoffset = (int)(((ni + 1) * pixel_per_line - i) / 2);
++		else
++		    yoffset = (int)((ni * pixel_per_line - i) / 2);
++		break;
++	    }
+ 	case ALIGN_TOP:
+ 	    top = 0;
+ 	    bottom = ni - 1;
+ 	    yoffset = 0;
+ 	    break;
+-	case ALIGN_MIDDLE:
+-	    top = ni / 2;
+-	    bottom = top;
+-	    if (top * 2 == ni)
+-		yoffset = (int)(((ni + 1) * pixel_per_line - i) / 2);
+-	    else
+-		yoffset = (int)((ni * pixel_per_line - i) / 2);
+-	    break;
+ 	case ALIGN_BOTTOM:
+ 	    top = ni - 1;
+ 	    bottom = 0;
+@@ -3407,7 +3415,12 @@ process_img(struct parsed_tag *tag, int width)
+ 	    }
+ 	    break;
+ 	}
+-	xoffset = (int)((nw * pixel_per_char - w) / 2);
++
++	if (enable_inline_image)
++	    xoffset = 0;
++	else
++	    xoffset = (int)((nw * pixel_per_char - w) / 2);
++
+ 	if (xoffset)
+ 	    Strcat(tmp, Sprintf(" xoffset=%d", xoffset));
+ 	if (yoffset)
+diff --git a/fm.h b/fm.h
+index 49af0e4..8f594dc 100644
+--- a/fm.h
++++ b/fm.h
+@@ -373,6 +373,8 @@ typedef struct _imageCache {
+     int index;
+     short width;
+     short height;
++    short a_width;
++    short a_height;
+ } ImageCache;
+ 
+ typedef struct _image {
+@@ -919,6 +921,7 @@ global char *CurrentKeyData;
+ global char *CurrentCmdData;
+ global char *w3m_reqlog;
+ extern char *w3m_version;
++extern int enable_inline_image;
+ 
+ #define DUMP_BUFFER   0x01
+ #define DUMP_HEAD     0x02
+@@ -1174,9 +1177,11 @@ global char *ssl_forbid_method init("2, 3");
+ global int is_redisplay init(FALSE);
+ global int clear_buffer init(TRUE);
+ global double pixel_per_char init(DEFAULT_PIXEL_PER_CHAR);
++global int pixel_per_char_i init(DEFAULT_PIXEL_PER_CHAR);
+ global int set_pixel_per_char init(FALSE);
+ #ifdef USE_IMAGE
+ global double pixel_per_line init(DEFAULT_PIXEL_PER_LINE);
++global int pixel_per_line_i init(DEFAULT_PIXEL_PER_LINE);
+ global int set_pixel_per_line init(FALSE);
+ global double image_scale init(100);
+ #endif
+diff --git a/image.c b/image.c
+index 9d0e9b5..91034ee 100644
+--- a/image.c
++++ b/image.c
+@@ -44,6 +44,8 @@ initImage()
+ 	activeImage = TRUE;
+ }
+ 
++int get_pixel_per_cell(int *ppc, int *ppl);
++
+ int
+ getCharSize()
+ {
+@@ -52,6 +54,24 @@ getCharSize()
+     int w = 0, h = 0;
+ 
+     set_environ("W3M_TTY", ttyname_tty());
++
++    if (enable_inline_image) {
++	int ppc, ppl;
++
++	if (get_pixel_per_cell(&ppc,&ppl)) {
++	    pixel_per_char_i = ppc ;
++	    pixel_per_line_i = ppl ;
++	    pixel_per_char = (double)ppc;
++	    pixel_per_line = (double)ppl;
++	}
++	else {
++	    pixel_per_char_i = (int)pixel_per_char;
++	    pixel_per_line_i = (int)pixel_per_line;
++	}
++
++	return  TRUE;
++    }
++
+     tmp = Strnew();
+     if (!strchr(Imgdisplay, '/'))
+ 	Strcat_m_charp(tmp, w3m_auxbin_dir(), "/", NULL);
+@@ -156,6 +176,10 @@ addImage(ImageCache * cache, int x, int y, int sx, int sy, int w, int h)
+ static void
+ syncImage(void)
+ {
++    if (enable_inline_image) {
++	return;
++    }
++
+     fputs("3;\n", Imgdisplay_wf);	/* XSync() */
+     fputs("4;\n", Imgdisplay_wf);	/* put '\n' */
+     while (fflush(Imgdisplay_wf) != 0) {
+@@ -171,12 +195,16 @@ syncImage(void)
+     n_terminal_image = 0;
+ }
+ 
++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);
++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);
++
+ void
+ drawImage()
+ {
+     static char buf[64];
+     int j, draw = FALSE;
+     TerminalImage *i;
++    struct stat st ;
+ 
+     if (!activeImage)
+ 	return;
+@@ -184,6 +212,47 @@ drawImage()
+ 	return;
+     for (j = 0; j < n_terminal_image; j++) {
+ 	i = &terminal_image[j];
++
++	if (enable_inline_image) {
++	#if 0
++	    fprintf(stderr,"file %s x %d y %d w %d h %d sx %d sy %d sw %d sh %d (ppc %d ppl %d)\n",
++		((enable_inline_image == 2 || getenv("WINDOWID")) &&
++		 i->cache->touch) ? i->cache->file : i->cache->url,
++		i->x, i->y,
++		i->cache->width > 0 ? i->cache->width : 0,
++		i->cache->height > 0 ? i->cache->height : 0,
++		i->sx, i->sy, i->width, i->height,
++		pixel_per_char_i, pixel_per_line_i);
++	#endif
++	    (enable_inline_image == 2 ? put_image_sixel : put_image_osc5379)(
++		((enable_inline_image == 2 /* sixel */ || getenv("WINDOWID")) &&
++		 /* XXX I don't know why but sometimes i->cache->file doesn't exist. */
++		 i->cache->touch && stat(i->cache->file,&st) == 0) ?
++			/* local */ i->cache->file : /* remote */ i->cache->url,
++		i->x / pixel_per_char_i,
++		i->y / pixel_per_line_i,
++	    #if 1
++		i->cache->a_width > 0 ?
++			(i->cache->width + i->x % pixel_per_char_i + pixel_per_char_i - 1) /
++				pixel_per_char_i :
++	    #endif
++			0,
++
++	    #if 1
++		i->cache->a_height > 0 ?
++			(i->cache->height + i->y % pixel_per_line_i + pixel_per_line_i - 1) /
++				pixel_per_line_i :
++	    #endif
++			0,
++		i->sx / pixel_per_char_i,
++		i->sy / pixel_per_line_i,
++		(i->width + i->sx % pixel_per_char_i + pixel_per_char_i - 1) / pixel_per_char_i,
++		(i->height + i->sy % pixel_per_line_i + pixel_per_line_i - 1) / pixel_per_line_i,
++		n_terminal_image);
++
++	    continue ;
++	}
++
+ 	if (!(i->cache->loaded & IMG_FLAG_LOADED &&
+ 	      i->width > 0 && i->height > 0))
+ 	    continue;
+@@ -207,9 +276,15 @@ drawImage()
+ 	fputs("\n", Imgdisplay_wf);
+ 	draw = TRUE;
+     }
+-    if (!draw)
+-	return;
+-    syncImage();
++
++    if (!enable_inline_image) {
++	if (!draw)
++	    return;
++	syncImage();
++    }
++    else
++	n_terminal_image = 0;
++
+     touch_cursor();
+     refresh();
+ }
+@@ -321,6 +396,8 @@ showImageProgress(Buffer *buf)
+ 	}
+     }
+     if (n) {
++        if (enable_inline_image && n == l)
++	    drawImage();
+ 	message(Sprintf("%d/%d images loaded", l, n)->ptr,
+ 		buf->cursorX + buf->rootX, buf->cursorY + buf->rootY);
+ 	refresh();
+@@ -350,7 +427,7 @@ loadImage(Buffer *buf, int flag)
+     }
+     for (i = 0; i < n_load_image; i++) {
+ 	cache = image_cache[i];
+-	if (!cache)
++	if (!cache || !cache->touch)
+ 	    continue;
+ 	if (lstat(cache->touch, &st))
+ 	    continue;
+@@ -381,7 +458,7 @@ loadImage(Buffer *buf, int flag)
+ 
+     for (i = (buf != image_buffer) ? 0 : maxLoadImage; i < n_load_image; i++) {
+ 	cache = image_cache[i];
+-	if (!cache)
++	if (!cache || !cache->touch)
+ 	    continue;
+ 	if (cache->pid) {
+ 	    kill(cache->pid, SIGKILL);
+@@ -407,7 +484,8 @@ loadImage(Buffer *buf, int flag)
+     }
+ 
+     if (draw && image_buffer) {
+-	drawImage();
++        if (!enable_inline_image)
++	    drawImage();
+ 	showImageProgress(image_buffer);
+     }
+ 
+@@ -435,6 +513,9 @@ loadImage(Buffer *buf, int flag)
+ 		break;
+ 	}
+ 	image_cache[i] = cache;
++	if (!cache->touch) {
++	    continue;
++	}
+ 
+ 	flush_tty();
+ #ifdef DONT_CALL_GC_AFTER_FORK
+@@ -515,12 +596,30 @@ getImage(Image * image, ParsedURL *current, int flag)
+ 	cache->url = image->url;
+ 	cache->current = current;
+ 	cache->file = tmpfname(TMPF_DFL, image->ext)->ptr;
+-	cache->touch = tmpfname(TMPF_DFL, NULL)->ptr;
+ 	cache->pid = 0;
+ 	cache->index = 0;
+ 	cache->loaded = IMG_FLAG_UNLOADED;
+-	cache->width = image->width;
+-	cache->height = image->height;
++	if (enable_inline_image == 1) {
++	    if (image->width > 0 && image->width % pixel_per_char_i > 0)
++		image->width += (pixel_per_char_i - image->width % pixel_per_char_i);
++
++	    if (image->height > 0 && image->height % pixel_per_line_i > 0)
++		image->height += (pixel_per_line_i - image->height % pixel_per_line_i);
++	    if (image->height > 0 && image->width > 0) {
++		cache->loaded = IMG_FLAG_LOADED;
++	    }
++	}
++	if (cache->loaded == IMG_FLAG_UNLOADED) {
++	    cache->touch = tmpfname(TMPF_DFL, NULL)->ptr;
++	}
++	else {
++	    cache->touch = NULL;
++	}
++
++	cache->width = image->width ;
++	cache->height = image->height ;
++	cache->a_width = image->width;
++	cache->a_height = image->height;
+ 	putHash_sv(image_hash, key->ptr, (void *)cache);
+     }
+     if (flag != IMG_FLAG_SKIP) {
+@@ -542,6 +641,78 @@ getImage(Image * image, ParsedURL *current, int flag)
+     return cache;
+ }
+ 
++static int
++parseImageHeader(char *path, u_int *width, u_int *height)
++{
++    FILE *fp;
++    u_char buf[8];
++
++    if (!(fp = fopen(path, "r"))) return FALSE;
++
++    if (fread(buf, 1, 2, fp) != 2) goto error;
++
++    if (memcmp(buf, "\xff\xd8", 2) == 0) {
++        /* JPEG */
++	if (fseek(fp, 2, SEEK_CUR) < 0)	goto error;   /* 0xffe0 */
++	while (fread(buf, 1, 2, fp) == 2) {
++	    size_t len = ((buf[0] << 8) | buf[1]) - 2;
++	    if (fseek(fp, len, SEEK_CUR) < 0) goto error;
++	    if (fread(buf, 1, 2, fp) == 2 &&
++	        /* SOF0 or SOF2 */
++	        (memcmp(buf, "\xff\xc0", 2) == 0 || memcmp(buf, "\xff\xc2", 2) == 0)) {
++		fseek(fp, 3, SEEK_CUR);
++		if (fread(buf, 1, 2, fp) == 2) {
++		    *height = (buf[0] << 8) | buf[1];
++		    if (fread(buf, 1, 2, fp) == 2) {
++			*width = (buf[0] << 8) | buf[1];
++			goto success;
++		    }
++		}
++		break;
++	    }
++	}
++	goto error;
++    }
++
++    if (fread(buf + 2, 1, 1, fp) != 1) goto error;
++
++    if (memcmp(buf, "GIF", 3) == 0) {
++        /* GIF */
++	if (fseek(fp, 3, SEEK_CUR) < 0) goto error;
++	if (fread(buf, 1, 2, fp) == 2) {
++	    *width = (buf[1] << 8) | buf[0];
++	    if (fread(buf, 1, 2, fp) == 2) {
++		*height = (buf[1] << 8) | buf[0];
++		goto success;
++	    }
++	}
++	goto error;
++    }
++
++    if (fread(buf + 3, 1, 5, fp) != 5) goto error;
++
++    if (memcmp(buf, "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a", 8) == 0) {
++	/* PNG */
++	if (fseek(fp, 8, SEEK_CUR) < 0) goto error;
++	if (fread(buf, 1, 4, fp) == 4) {
++	    *width = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
++	    if (fread(buf, 1, 4, fp) == 4) {
++		*height = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
++		goto success;
++	    }
++	}
++	goto error;
++    }
++
++error:
++    fclose(fp);
++    return FALSE;
++
++success:
++    fclose(fp);
++    return TRUE;
++}
++
+ int
+ getImageSize(ImageCache * cache)
+ {
+@@ -554,6 +725,10 @@ getImageSize(ImageCache * cache)
+     if (!cache || !(cache->loaded & IMG_FLAG_LOADED) ||
+ 	(cache->width > 0 && cache->height > 0))
+ 	return FALSE;
++
++    if (parseImageHeader(cache->file, &w, &h))
++	goto got_image_size;
++
+     tmp = Strnew();
+     if (!strchr(Imgdisplay, '/'))
+ 	Strcat_m_charp(tmp, w3m_auxbin_dir(), "/", NULL);
+@@ -569,6 +744,8 @@ getImageSize(ImageCache * cache)
+ 
+     if (!(w > 0 && h > 0))
+ 	return FALSE;
++
++got_image_size:
+     w = (int)(w * image_scale / 100 + 0.5);
+     if (w == 0)
+ 	w = 1;
+@@ -581,11 +758,11 @@ getImageSize(ImageCache * cache)
+     }
+     else if (cache->width < 0) {
+ 	int tmp = (int)((double)cache->height * w / h + 0.5);
+-	cache->width = (tmp > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : tmp;
++	cache->a_width = cache->width = (tmp > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : tmp;
+     }
+     else if (cache->height < 0) {
+ 	int tmp = (int)((double)cache->width * h / w + 0.5);
+-	cache->height = (tmp > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : tmp;
++	cache->a_height = cache->height = (tmp > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : tmp;
+     }
+     if (cache->width == 0)
+ 	cache->width = 1;
+diff --git a/main.c b/main.c
+index c8f1e82..32f4da2 100644
+--- a/main.c
++++ b/main.c
+@@ -122,6 +122,8 @@ static int searchKeyNum(void);
+ #define help() fusage(stdout, 0)
+ #define usage() fusage(stderr, 1)
+ 
++int enable_inline_image;	/* 1 == mlterm OSC 5379, 2 == sixel */
++
+ static void
+ fversion(FILE * f)
+ {
+@@ -409,7 +411,6 @@ main(int argc, char **argv, char **envp)
+ #if defined(DONT_CALL_GC_AFTER_FORK) && defined(USE_IMAGE)
+     char **getimage_args = NULL;
+ #endif /* defined(DONT_CALL_GC_AFTER_FORK) && defined(USE_IMAGE) */
+-
+     GC_INIT();
+ #if defined(ENABLE_NLS) || (defined(USE_M17N) && defined(HAVE_LANGINFO_CODESET))
+     setlocale(LC_ALL, "");
+@@ -679,6 +680,12 @@ main(int argc, char **argv, char **envp)
+ 		}
+ 	    }
+ #endif
++	    else if (!strcmp("-ri", argv[i])) {
++	        enable_inline_image = 1;
++	    }
++	    else if (!strcmp("-sixel", argv[i])) {
++		enable_inline_image = 2;
++	    }
+ 	    else if (!strcmp("-num", argv[i]))
+ 		showLineNum = TRUE;
+ 	    else if (!strcmp("-no-proxy", argv[i]))
+@@ -5910,8 +5917,14 @@ deleteFiles()
+ 	    Firstbuf = buf;
+ 	}
+     }
+-    while ((f = popText(fileToDelete)) != NULL)
++    while ((f = popText(fileToDelete)) != NULL) {
+ 	unlink(f);
++	if (enable_inline_image == 2 && strcmp(f+strlen(f)-4, ".gif") == 0) {
++	    Str firstframe = Strnew_charp(f);
++	    Strcat_charp(firstframe, "-1");
++	    unlink(firstframe->ptr);
++        }
++    }
+ }
+ 
+ void
+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)
+diff --git a/w3mimg/x11/x11_w3mimg.c b/w3mimg/x11/x11_w3mimg.c
+index cef72e2..bc8d0aa 100644
+--- a/w3mimg/x11/x11_w3mimg.c
++++ b/w3mimg/x11/x11_w3mimg.c
+@@ -121,16 +121,21 @@ x11_init(w3mimg_op * self)
+     if (self == NULL)
+ 	return 0;
+     xi = (struct x11_info *)self->priv;
++#if defined(USE_IMLIB)
+     if (xi == NULL)
+ 	return 0;
+-#if defined(USE_IMLIB)
+     if (!xi->id) {
+ 	xi->id = Imlib_init(xi->display);
+ 	if (!xi->id)
+ 	    return 0;
+     }
+ #elif defined(USE_GDKPIXBUF)
+-    if (!xi->init_flag) {
++    if (!xi) {
++#if defined(USE_GTK2)
++	g_type_init();
++#endif
++    }
++    else if (!xi->init_flag) {
+ #if defined(USE_GTK2)
+ 	g_type_init();
+ #endif
+@@ -138,7 +143,7 @@ x11_init(w3mimg_op * self)
+ 	xi->init_flag = TRUE;
+     }
+ #endif
+-    if (!xi->imageGC) {
++    if (xi && !xi->imageGC) {
+ 	xi->imageGC = XCreateGC(xi->display, xi->parent, 0, NULL);
+ 	if (!xi->imageGC)
+ 	    return 0;
+@@ -653,9 +658,11 @@ x11_get_image_size(w3mimg_op * self, W3MImage * img, char *fname, int *w,
+ 
+     if (self == NULL)
+ 	return 0;
++#if defined(USE_IMLIB) && defined(USE_IMLIB2)
+     xi = (struct x11_info *)self->priv;
+     if (xi == NULL)
+ 	return 0;
++#endif
+ 
+ #if defined(USE_IMLIB)
+     im = Imlib_load_image(xi->id, fname);
+@@ -755,6 +762,9 @@ w3mimg_x11open()
+ 	return NULL;
+     memset(wop, 0, sizeof(w3mimg_op));
+ 
++    if (getenv("W3M_USE_REMOTE_IMAGE"))
++	goto  end;
++
+     xi = (struct x11_info *)malloc(sizeof(struct x11_info));
+     if (xi == NULL)
+ 	goto error;
+@@ -807,6 +817,7 @@ w3mimg_x11open()
+ 
+     wop->priv = xi;
+ 
++  end:
+     wop->init = x11_init;
+     wop->finish = x11_finish;
+     wop->active = x11_active;
diff --git a/debian/patches/series b/debian/patches/series
index 8ab45cc..dab29de 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -43,6 +43,7 @@
 420_uninitialized.patch
 430_no-ascii-default.patch
 440_parsetagx-crash.patch
+450_remoteimg.path
 800_lang-en.patch
 810_lang-de.patch
 820_lang-ja.patch