
Inline image support of w3m
                                                              2002/02/04
                                                              H. Sakamoto

Introduction

  This is the extension for w3m to support inline image.

Support

  * Display inline image (GIF,PNG,JPEG, etc.) on terminals
    (xterm,rxvt, etc.) of X11.
  * Support inline image of <img> tag.
    Support of attributes "width", "height", and "align".
  * Direct display of image file which header is "Content-type: image/*"
  * Support of <map> tag.
    Support of attributes "shape" and "coords" of <area> tag. 
  * Support of an attribute "ismap" of <img> tag.
    "w3m" adds coordinate of the cursor as ?<x>,<y> to url, and sends url.
  * Support of an attribute "type=image" of <input> tag.
    "w3m" sends coordinate of the cursor as <name>.x=<x>&<name>.y=<y>.
  * Asynchronous loading of image files.
  * Using cache of image file as pixmap.

Key functions

  DISPLAY_IMAGE
      Restart loading and drawing of images.
  STOP_IMAGE
      Stop loading and drawing of images in the current buffer.
  SET_OPTION  display_image=toggle
      Toggle loading and drawing of images.

  These functions are not keybinded as default.
  Specify the following keymaps in ~/.w3m/keymap.
      keymap  X    DISPLAY_IMAGE
      keymap  C-c  STOP_IMAGE
      keyamp  t    SET_OPTION  display_image=toggle

Comandline options

  -ppc <pixel>
      # of pixels per character. The default value is automatically
      detected. Must fit the width of font of terminal.
  -ppl <pixel>
      # of pixels per character. The default value is automatically
      detected. Must fit the height of font of terminal.

Option panel

  pixel_per_char
      # of pixels per character. The default value is automatically
      detected. Must fit the width of font of terminal.
  pixel_per_line
      # of pixels per character. The default value is automatically
      detected. Must fit the height of font of terminal.
  display_image
      Display of inline image. The default is ON.
  auto_image
      Automatic loading of inline image. The default is ON.
      If it is OFF, loading starts with a command DISPLAY_IMAGE.
  max_load_image
      Maximum process for downloading of inline image. The default is 4.
      1 to 8 can be set.
  ext_image_viewer
      Use external image viewer, when a command VIEW_IMAGE or
      view of image file which header is "Content-type: image/*".
      The default is ON. If it is OFF, the image is directly displaied.
  image_scale
      Scale of image (%). The default value is 100(%).
  imgdisplay
      External command to display image". The default value is "w3mimgdisplay".
      See "Setting w3mimgdisplay".
  imgsize
      External command to get size of image. The default value is "w3mimgsize".

Required programs

  * w3m-0.2.5+cvs-1.287 or later
    http://w3m.sourceforge.net/
    http://sourceforge.net/projects/w3m/
    http://prdownloads.sourceforge.net/w3m/
  * Imlib-1.9.8 (1.9.10 is recommendable.)
    libungif-4.1.0b1 is recommendable.

Setting w3mimgdisplay

  "w3mimgdisplay" has the following options. Set options to fit terminal.

  -x <offset_x>
      The X origin of display of image on terminal. The default value is 2.
      If the terminal is "xterm", the width of scroll bar is added.
      If the terminal is "Eterm", it may be better to specify 5.
  -y <offset_y>
      The Y origin of display of image on terminal. The default value is 2.
      If the terminal is "Eterm", it may be better to specify 5.
  -bg <background>
      Background color of terminal. The default value is automatically
      detected.  When the color is specified as #RRGGBB, escape '#'.

  ex.)
    w3m -o 'imgdisplay=w3mimgdisplay -x 5 -bg "#cccccc"'
  
Change log

2002/02/04
 * Revised this document.

2002/02/01	w3m-0.2.5+cvs-1.287
 * Merged in the CVS repository of the original w3m.

2002/01/31	w3m-0.2.4-img-2.2
 * Based on w3m-0.2.4+cvs-1.278.

2002/01/29	w3m-0.2.4-img-2.1
 * Based on w3m-0.2.4+cvs-1.268.

2002/01/28	w3m-0.2.4-img-2.0
 * Based on w3m-0.2.4+cvs-1.265.
 * pixel_per_char and pixel_per_line are automatically detected.
 * The bckground color of terminal is automatically detected.
 * The source code to display images is moved to image.c

2002/01/08	w3m-0.2.4-img-1.18
 * Based on w3m-0.2.4

2001/12/29	w3m-0.2.3.2-img-1.17
 * Based on w3m-0.2.3.2+cvs-1.196.

2001/12/25	w3m-0.2.3.2-img-1.16.1
 * [w3m-dev 02698] Thanks > Kazuhiko-san

2001/12/22	w3m-0.2.3.2-img-1.16
 * Based on w3m-0.2.3.2.

2001/12/20	w3m-0.2.3.1-img-1.15
 * Based on w3m-0.2.3.1.
 * Support display of image with Content-Transfer-Encoding.

2001/11/29
 * Start merge against CVS source (ChangeLog 1.71)

2001/11/17	w3m-0.2.2-img-1.14
 * Based on w3m-0.2.2.

2001/11/14	w3m-0.2.1-inu-1.6-img-1.13
 * Based on w3m-0.2.1-inu-1.6.

2001/11/05	w3m-0.2.1-inu-1.5-img-1.12
 * Based on w3m-0.2.1-inu-1.5.
 * Fixed the bug for <area>, <map>.
 * Fixed the problem with xwnmo on kterm.

2001/10/03	w3m-0.2.1-inu-1.4-img-1.11
 * Based on w3m-0.2.1-inu-1.4.
 * Fixed bug when reading from stdin.
 * Fixed "configure". Thanks > Fukagawa-san.

2001/08/01	w3m-0.2.1-img-1.10
 * Adjust image position.
 * Fixed scaling image.

2001/07/31	w3m-0.2.1-img-1.9
 * Fixed initImgdisplay(). Thanks > David.

2001/07/29	w3m-0.2.1-img-1.8
 * Fixed "configure".

2001/07/28	w3m-0.2.1-img-1.7
 * Sorry, w3m-0.2.1-img-1.6 is not complete.
 * Added "configure" and "Makefile" to the patch.

2001/07/27	w3m-0.2.1-img-1.6
 * Created doc/README.img.

-------------------------------------------
Hironori Sakamoto <hsaka@mth.biglobe.ne.jp>
 http://www2u.biglobe.ne.jp/~hsaka/
