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How to enable img in postscript

I want to add an image to my postscript

%!PS-Adobe-3.0

/Times-Roman findfont
12 scalefont setfont

50 700 moveto
(text) show
showpage

but I have no idea to do this. Is someone helping?

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3 answers

; TL; DR

go to the middle and start reading with a simple workflow to the end.

convert to xbm, hack vi, embedded data with {currentfile} image

It is documented in a Postscript language reference manual, but the information can be a little complicated to digest.

As Ken says, you need to use a statement image. I usually go for the "old school" form, which

width bit height per pixel matrix proc image & dash;

- convert ImageMagick, . , eps, , , .

% convert image.png image.xbm

:

  1 #define glasses_width 320
  2 #define glasses_height 240
  3 static char glasses_bits[] = {
  4   0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  5   0x00, 0x00, 0x00, 0x00, 0x45, 0x65, 0xDB, 0x65, 0xB5, 0x6F, 0xBF, 0xEF,
  6   0xFF, 0xFF, 0xFF, 0xBF, 0xB5, 0xED, 0x3C, 0xBF, 0xB3, 0xDB, 0xAD, 0xF6,
  7   0xE6, 0x4A, 0xAA, 0xBA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
  8   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x99, 0xA8, 0x66, 0xD6,
  9   0xDF, 0xF9, 0xF7, 0xBF, 0xFF, 0xFD, 0xFF, 0xFE, 0xFF, 0x7F, 0xFB, 0xEA,
 10   0xDD, 0x5A, 0x9A, 0x69, 0xB9, 0xBE, 0x55, 0x65, 0x00, 0x00, 0x00, 0x00,
...
803   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
804   };

, vi, ,

:%s/^#/%#/         #comment-out the #defines
:g/[{}]/d          #delete the array brackets
:%s/0x//g          #remove the 0x prefixes
:%s/, //g          #remove the spaces

- :

  1 %#define glasses_width 320
  2 %#define glasses_height 240 
  3   000000000003000000000000
  4   000000004565DB65B56FBFEF
  5   FFFFFFBFB5ED3CBFB3DBADF6
  6   E64AAABA0000000000020000
  7   000000000000000099A866D6
  8   DFF9F7BFFFFDFFFEFF7FFBEA
  9   DD5A9A69B9BE556500000000
 10   000C00000000000000000000
...
802   000000000000000000000000

image,

%width height depth [ x-scale x-skew y-skew y-scale x-offset y-offset ]=matrix 
320    240    1     [ 1       0      0      -1      0        240 ]
%  {proc-yielding-string-data}                  call(image)
   { currentfile 80 string readhexstring pop }  image

, . ascii, - . - , . ( , , . , .: D)

, . Postscript -. 7 , 0 . xbm. , :

%!
%reverse the bits in a byte
/reverse {               % b
    dup 1 and            % b b0          % explode the bits
    1 index 2 and        % b b0 b1
    2 index 4 and        % b b0 b1 b2
    3 index 8 and        % b b0 b1 b2 b3
    4 index 16 and       % b b0 b1 b2 b3 b4
    5 index 32 and       % b b0 b1 b2 b3 b4 b5
    6 index 64 and       % b b0 b1 b2 b3 b4 b5 b6
    8 7 roll 128 and     % b0 b1 b2 b3 b4 b5 b6 b7
    -7 bitshift exch     % b0 b1 b2 b3 b4 b5 b7-7=0' b6  % shift and combine
    -5 bitshift or exch  % b0 b1 b2 b3 b4 b0'|b6-5=1' b5
    -3 bitshift or exch  % b0 b1 b2 b3 b0'|b1'|b5-3=2' b4
    -1 bitshift or exch  % b0 b1 b2 b0'|b1'|b2'|b4-1=3' b3
    1 bitshift or exch   % b0 b1 b0'|b1'|b2'|b3'|b3+1=4' b2
    3 bitshift or exch   % b0 b0'|b1'|b2'|b3'|b4'|b2+3=5' b1
    5 bitshift or exch   % b0'|b1'|b2'|b3'|b4'|b5'|b1+5=6' b0
    7 bitshift or        % b0'|b1'|b2'|b3'|b4'|b5'|b6'|b0+7=7'
} def

320 240 1  % width height bitdepth
[ 1 0 0 -1 0 240 ]  % 1-to-1 matrix with descending y, offset by max_y
{ %proc-yielding-string
    currentfile 80 string  % file string
    readhexstring pop  % string         read a line of hex data from THIS FILE
    0 1 2 index length 1 sub  % string 0 1 strlen-1
    {  % string index
        2 copy 2 copy  % str i str i str i
        get reverse    % str i str i rev(str_i)
        put  % str' i
        pop % str'                      % reverse each char (byte)
    } for                               % loop over chars in string
} image
  000000000003000000000000
  000000004565DB65B56FBFEF
  FFFFFFBFB5ED3CBFB3DBADF6
  E64AAABA0000000000020000
  000000000000000099A866D6
  DFF9F7BFFFFDFFFEFF7FFBEA
  ...

.

, "", pbm, , . xxd -ps "". , . - , ( xxd, - char ).

%!
% swar.ps
%
%image example
%image origin:  http://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Spacewar%21-PDP-1-20070512.jpg/320px-Spacewar%21-PDP-1-20070512.jpg
%
% bash commands to prepare image file:
%
% $ wget http://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Spacewar%21-PDP-1-20070512.jpg/320px-Spacewar%21-PDP-1-20070512.jpg
% $ identify 320px-Spacewar\!-PDP-1-20070512.jpg 
% $ convert 320px-Spacewar\!-PDP-1-20070512.jpg spacewar.pbm
% $ xxd -ps spacewar.pbm > spacewar.asc
% % gs swar.ps


/infile (spacewar.asc)(r)file def
/buf 256 string def

% use $ xxd spacewar.pbm | head
% to find the length of the header and read that length
% into the buffer and discard, leaving only samples.
infile buf 0 16#5d getinterval readhexstring pop pop 

320 215 1
[ 1 0 0 -1 0 215 ]
{ infile buf readhexstring pop } image

showpage

spacewar.asc - .

$ head spacewar.asc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, ( ) SAFER, .

currentfile, .

%!
/buf 256 string def

320 215 1
[ 1 0 0 -1 0 215 ]
{ currentfile buf readhexstring pop }
{ 
    infile buf 0 16#5d getinterval readhexstring pop pop  % discard header
    image 
} exec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%...

, 64 , . [. . , ghostscript . ] , .

%!
/imgbuf 320 215 mul 8 div ceiling cvi string def   % create a string for byte storage (<64k)

{ 
    currentfile imgbuf 0 16#5d getinterval readhexstring pop pop  % read header
    currentfile imgbuf readhexstring pop pop                 % read data (discarding header data)
} exec
50340a2346696c6520736f757263653a20687474703a2f2f636f6d6d6f6e
732e77696b696d656469612e6f72672f77696b692f46696c653a53706163
65776172212d5044502d312d32303037303531322e6a70670a3332302032
31350a007fffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffff007fffffffffffffffffffffffdfffffff
ffffffffffffffffffffffffffffffffffffffffffffff007fffffffffff
ffffffffffff803fffffffffffffffffffffffffffffffffffffffffffff
ffffff007ffffffffffffffffffffffff800ffffffffffffffffffffffff
ffffffffffffffffffffffffff007fffffffffffffffffffffff7fe007ff
ffffffffffffffffffffffffffffffffffffffffffffff007fffffffffff
%...

320 215 1
[ 1 0 0 -1 0 215 ]
{ imgbuf }
image

I, ( )...

PLRM. , ( ) , ...

image , . image . , , . , , - , , .. , imgbuf , , readhexstring). :

320 215 scale  % scale 1x1 image to proper dimensions
320 215 1          % "data" dimensions: w h bit-depth
[ 320 0 0 -215 0 215 ]              % inverse mapping
{ imgbuf }   % data-acquisition (yield data in a string)
image

, (, "", ) 1 -X-1, () , 1 . : 320 215 scale, - , 1pixel-to-1point.

, 320 215 scale 640 430 scale ( a 2 2 scale).

320 215 scale
2 2 scale % == 640 430 scale
320 215 1                           % w h bit-depth
[ 320 0 0 -215 0 215 ]              % inverse mapping
{ imgbuf }   % data-acquisition
image

, .: D

320 215 1
[ .5 0 0 -.5 0 430 ] % "doubled,inverted (ie. halved) with double-offset" matrix
{ imgbuf }
image
+7

. PostScript, , . 4.10 , , , 1 (4.10.1-4.10.5).

:

/OneComponentString <007ff700> def

/OneComponentImage1
{
<<
/ImageType 1
/Width 2
/Height 2
/ImageMatrix [2 0 0 -2 0 2]
/BitsPerComponent 8
/Decode [0 1]
/DataSource OneComponentString
>>
} bind def

gsave
0 0 moveto
20 20 scale
/DeviceGray setcolorspace
OneComponentImage1 image
grestore

showpage
+3

- EPS .
EPS, . myimage.eps, , , placeEPS myimage.eps, .

%!PS-Adobe-3.0

% Place EPS image definition
% Syntax: <file> <scale> <x> <y> placeEPS
% =============================================================
/placeEPS 
{
    userdict begin

    /__be_state     save            def
    /__ds_count     countdictstack  def
    /__os_count     count 5 sub     def
    /showpage       {}              def

    initgraphics
    translate 
    dup scale 
    run

    count           __os_count sub  { pop } repeat
    countdictstack  __ds_count sub  { end } repeat
                    __be_state              restore
    end
} bind def
% =============================================================

% Your old code starts here
/Times-Roman findfont
12 scalefont setfont
50 700 moveto
(text) show

% Now mark myimage.eps scaled to 100% at position 100, 100
(myfolder/myimage.eps) 1 100 100 placeEPS

showpage

PDF Acrobat Distiller GhostScript.
.

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