#!/usr/bin/env ruby
#
#  Tk::Img demo
#
#    --  This script is based on demo.tcl of Tcl/Tk's 'Img' extention. 
#        Image data in this script is those of demo.tcl.
#        Please read 'license_terms_of_Img_extension' file.
#
require 'tk'
require 'tkextlib/tkimg'

#
# Make the Image format available.
#
class TkImg_demo
  def initialize
    img_version = Tk::Img.package_version

    @typeFrame = Hash.new
    @imgPriv = Hash.new

    root = TkRoot.new(:title=>'Tests for available image formats')

    root.winfo_children.each{|w| w.destroy}
    TkImage.names{|img| img.delete}

    f = TkFrame.new
    TkButton.new(f, :text=>'Dismiss', :command=>proc{exit}).pack(:side=>:left)
    f.pack(:side=>:top, :expand=>:y, :fill=>:both)

    TkMessage.new(:aspect=>900, :text=>format('This page shows the available image formats of the Img extension (Img version %s, using Tcl/Tk %s)', img_version, Tk::TK_PATCHLEVEL)).pack(:side=>:top, :expand=>:y, :fill=>:both)
  end

##############################

  def update_animated_gif(w, method, num)
    return unless @imgPriv[w]

    if @imgPriv[w][:args]
      im = TkPhotoImage.new
      im.copy(@imgPriv[w][num])
      num += 1
      begin
        im.configure(@imgPriv[w][:args].merge(:format=>[:gif, {:index=>num}]))
        im.configure(:data=>'', :file=>'') #free storage
        @imgPriv[w][num] = im
      rescue
        @imgPriv[w].delete(:args)
        if num > 1
          num = 0
          im = @imgPriv[w][num]
        else
          # this is not an animated GIF; just stop
          @imgPriv[w].delete(0)
          return
        end
      end
    else
      num += 1
      num = 0 unless @imgPriv[w][num]
      im = @imgPriv[w][num]
    end
    begin
      w.__send__(method, im)
      Tk.update_idletasks
      Tk.after(20, proc{update_animated_gif(w, method, num)})
    rescue
      @imgPriv[w].delete(:args)
      @imgPriv[w].each{|im|
        @im.delete
        @imgPriv.delete(im)
      }
    end
  end

  def show_animated_gif(keys)
    w = TkLabel.new
    begin
      im = TkPhotoImage.new(keys.merge(:format=>[:gif, {:index=>0}]))
      im.configure(:data=>'', :file=>'', :format=>'') #free storage
      w.image(im)
      @imgPriv[w] ||= Hash.new
      @imgPriv[w][0] = im
      @imgPriv[w][:args] = keys
      Tk.update_idletasks
      Tk.after(20, proc{update_animated_gif(w, :image, 0)})
    rescue => e
      w.configure(:text=>"error displaying animated gif:\n#{e.message}", 
                  :image=>'', :relief=>:ridge)
    end
    w.pack
  end

  def show_image(fmt, type, data)
    fmt = fmt.to_s.capitalize
    unless @typeFrame[fmt]
      @typeFrame[fmt] = TkFrame.new.pack(:side=>:top, :expand=>true, :fill=>:x)
      TkLabel.new(@typeFrame[fmt], :text=>"#{fmt} :  ").pack(:side=>:left)
    end
    begin
      f = TkFrame.new(@typeFrame[fmt], 
                      :borderwidth=>2, :relief=>:ridge).pack(:side=>:left)
      im = TkPhotoImage.new(:data=>data)
      im['data'] = ''
      TkLabel.new(f, :image=>im).pack
      TkLabel.new(f, :text=>type, :borderwidth=>0, :pady=>0, :padx=>2, 
                  :font=>'Helvetica 8').pack
    rescue => e
      TkMessage.new(f, :text=>"error displaying #{type} image: #{e.message}", 
                    :aspect=>250).pack
    end
    Tk.update
  end

end

##############

demo = TkImg_demo.new

##############

demo.show_animated_gif(:data=><<'ENDofIMG')
[encoded data, 4380 characters]
ENDofIMG

demo.show_image('bmp', '1-bit', <<'ENDofIMG')
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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
ENDofIMG

demo.show_image('bmp', '4-bit', <<'ENDofIMG')
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VVVVVVIAAAAFVVVVVVVVVVVVVVVVVVVVUQAAAAVVVVVVVVVVVVVVVTdVVVVWAAAAAAAhNnWF
VVVVVVcAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==}
ENDofIMG

if false
demo.show_image('bmp', '4-bit-RLE', <<'ENDofIMG')
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ENDofIMG
end

demo.show_image('bmp', '8-bit', <<'ENDofIMG')
Qk0CCAAAAAAAAPoAAAAoAAAAIgAAADIAAAABAAgAAAAAAAgHAABtCwAAbQsAADEAAAAxAAAA
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ENDofIMG

if false
demo.show_image('bmp', '8-bit-RLE', <<'ENDofIMG')
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ENDofIMG
end

demo.show_image('bmp', '32-bit', <<'ENDofIMG')
[encoded data, 7081 characters]
//////////////////8AAA==
ENDofIMG

demo.show_image('gif', 'gif87a', <<'ENDofIMG')
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kFA4UDgwSJiIiIBwcKiQmLCooLCYkDgoQP//////////////////////////////////////
////////////////////////////////////////////////////////////////////////
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"  b.p.b.#.#.#.#.#.b.b.b.b.b.b.K.Pax.V.7aNa7#7#t#vafbB.B.B.B.B.n.A.A.A.fbfb9aA.t#t#fbfbQaH#7#D#m.X..a.a.aX.v.v.v.v.m.m..am.v.m.m.",
"    #.K.K.K.K.K.#.b.b.b.b.K.K.K.T.S.V.9aB.ebNaV.p#9a9aB.D#9a9aB.A.A.A.9aB.B.Eafbn.t#g#hat#X#m..ay#y#y#y#.ay#v.v.v..aX.y#.av.v.v.",
"    #.K.K.#.K.K.K.K.K.K.K.K.K.QaT.V.7#Ea9af.f.2at#OaD#F#Q.J.9aEaB.Ea9a6.Ea9aEaV.H#H#t#2aD#J.v.m.y#y#y#y#X..ay#y#y#y#y#y#.ay#.av.",
"      K.K.K.K.b.b.b.b.K.K.K.K.g#g#t#D#fbWag#c#X#2a2aeb7#D#Q.vaA.2at#p#9a6.V.7#7#9avaSaSaSav.m.v.v.y#.ay#X.v.v.v.v.y#y#y#y#y#y#y#",
"      K.K.b.m.b.b.b.b.K.K.K.K.Ja7#7#6.2az.#ac#z.G#eaG#p#2a2a2at#t#t#t#7#9aD#J.SaL#RaRaF#v.v.v.v.v.v.y#m.v.v.a#a#v.v.M#M#M#y#y#  ",
"        b.b.m.b.m.b.b.b.K.X.7#7#7#7#D#3.1.z.yac#yaibh#caB#L#eaz.z.z.z.z.F#h##ab##aL#ibibv.a#m.m.v.y#M#y#a#v.v.v.a#a#a#a#M#      ",
"        p.b.m.b.b.m.b.b.m.b.7#9a9aSahb..m..ayayahbhbF.h#Ias.RaRaibibL.L#kab#bab#1.L.L.y#y#a#v.v.M#y#y#M#y#v.a#a#a#v.a#a#        ",
"          b.m.b.b.X.K..aK.b.7#D#F#hbv#m.b.m.m.F.F.F.v#v#F.v#L.L.L.L#..ka6#h.s.1.L#1.y#M#y#daM#M#day#y#M#M#M#a#a#a#a#            ",
"          p.b.X.X.X.X.X.X.X.9aD#6#..m..aX.y#m.m.F.v#v#v#....1.Ia....kakar#r#r#1.s.M#M#y#a#a#a#M#M#y#y#daM#dadada                ",
"            .a.aX..aX..aX..aD#SaF..ay#y#.aX..am.m.........s.s.9.9.r#r#r#r#kakar#M#M#a#a#a#a#a#a#M#M#M#M#dadada                  ",
"            K.X..a.a.a.a.aH#vab#1.y#X.X.y#y#y#y#v.v...s.d.d.d.s.r#r#h.jajajar#a#M#v.a#a#a#a#a#a#P#dadadaM#                      "};
ENDofIMG

demo.show_image('xpm', 'color', "/* XPM */
static char * teapot[] = {
\"64 48 204 2\",
\"   c #145ec4#{teapot}")

demo.show_image('xpm', 'transparent', "/* XPM */
static char * teapot[] = {
\"64 48 204 2\",
\"   s None c None#{teapot}")

demo.show_image('xbm', 'bitmap', <<'ENDofIMG')
#define flagup_width 48
#define flagup_height 48
static char flagup_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x7f, 0x00,
   0x00, 0x00, 0x00, 0xe0, 0x7f, 0x00, 0x00, 0x00, 0x00, 0xef, 0x6a, 0x00,
   0x00, 0x00, 0xc0, 0x7b, 0x75, 0x00, 0x00, 0x00, 0xe0, 0xe0, 0x6a, 0x00,
   0x00, 0x00, 0x30, 0x60, 0x75, 0x00, 0x00, 0x00, 0x18, 0xe0, 0x7f, 0x00,
   0x00, 0x00, 0x0c, 0xe0, 0x7f, 0x00, 0x00, 0x00, 0x06, 0xe0, 0x04, 0x00,
   0x00, 0x00, 0x03, 0xe0, 0x04, 0x00, 0x00, 0x80, 0x01, 0xe0, 0x06, 0x00,
   0x00, 0xc0, 0x1f, 0xe0, 0x07, 0x00, 0x00, 0xe0, 0x7f, 0xe0, 0x07, 0x00,
   0x00, 0x70, 0xe0, 0xe0, 0x05, 0x00, 0x00, 0x38, 0x80, 0xe1, 0x04, 0x00,
   0x00, 0x18, 0x80, 0xf1, 0x04, 0x00, 0x00, 0x0c, 0x00, 0xfb, 0x04, 0x00,
   0x00, 0x0c, 0x00, 0xff, 0x04, 0x00, 0x00, 0x86, 0x1f, 0xee, 0x04, 0x00,
   0x00, 0x06, 0x06, 0xe6, 0x04, 0x00, 0x00, 0x06, 0x00, 0xe6, 0x04, 0x00,
   0x00, 0x06, 0x00, 0xe6, 0x04, 0x00, 0x00, 0x06, 0x00, 0x66, 0x04, 0x00,
   0x7f, 0x56, 0x52, 0x06, 0xe4, 0xff, 0x00, 0x76, 0x55, 0x06, 0x04, 0x00,
   0x00, 0x56, 0x57, 0x06, 0x04, 0x00, 0x00, 0x56, 0x55, 0x06, 0x06, 0x00,
   0x00, 0x56, 0xd5, 0x06, 0x03, 0x00, 0x00, 0x06, 0x00, 0x86, 0x01, 0x00,
   0x54, 0x06, 0x00, 0xc6, 0x54, 0x55, 0xaa, 0x06, 0x00, 0x66, 0xaa, 0x2a,
   0x54, 0x06, 0x00, 0x36, 0x55, 0x55, 0xaa, 0x06, 0x00, 0xbe, 0xaa, 0x2a,
   0x54, 0xfe, 0xff, 0x6f, 0x55, 0x55, 0xaa, 0xfc, 0xff, 0xa7, 0xaa, 0x2a,
   0x54, 0x01, 0x88, 0x60, 0x55, 0x55, 0xaa, 0xaa, 0x8a, 0xa0, 0xaa, 0x2a,
   0x54, 0x55, 0x8d, 0x60, 0x55, 0x55, 0xaa, 0xaa, 0x8a, 0xa0, 0xaa, 0x2a,
   0x54, 0x55, 0x8d, 0x60, 0x55, 0x55, 0xaa, 0xaa, 0x8a, 0xa0, 0xaa, 0x2a,
   0x54, 0x55, 0x8d, 0x50, 0x55, 0x55, 0xaa, 0xaa, 0x8a, 0xa8, 0xaa, 0x2a,
   0x54, 0x55, 0x95, 0x54, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0x2a,
   0x54, 0x55, 0x55, 0x55, 0x55, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
ENDofIMG

demo.show_image('png', 'color', <<'ENDofIMG')
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ENDofIMG

demo.show_image('png', 'grayscale', <<'ENDofIMG')
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ENDofIMG

demo.show_image('png', 'transparent color', <<'ENDofIMG')
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ENDofIMG

demo.show_image('png', 'transparent grayscale', <<'ENDofIMG')
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ENDofIMG

demo.show_image('jpeg', 'color', <<'ENDofIMG')
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ENDofIMG

demo.show_image('jpeg', 'grayscale', <<'ENDofIMG')
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ENDofIMG

demo.show_image('jpeg', 'progressive color', <<'ENDofIMG')
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ENDofIMG

demo.show_image('jpeg', 'progressive grayscale', <<'ENDofIMG')
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ENDofIMG

demo.show_image('tiff', 'uncompressed', <<'ENDofIMG')
[encoded data, 10658 characters]
ENDofIMG

demo.show_image('tiff', 'packbits compressed', <<'ENDofIMG')
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ENDofIMG

if false
demo.show_image('tiff', 'pixarlog compressed', <<'ENDofIMG')
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AAA=
ENDofIMG
end

if false
demo.show_image('tiff', 'logluv compressed', <<'ENDofIMG')
TU0AKgAAAAgADgEAAAMAAAABAEAAAAEBAAMAAAABACgAAAECAAMAAAADAAAAtgEDAAMAAAAB
h3QAAAEGAAMAAAABAAIAAAERAAQAAAABAAAAAAESAAMAAAABAAEAAAEVAAMAAAABAAMAAAEW
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AAEAAAEoAAMAAAABAAIAAAAAAAAAEAAQABASwAAAAAQAABLAAAAABAAA
ENDofIMG
end

demo.show_image('tiff', 'jpeg compressed', <<'ENDofIMG')
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ENDofIMG

demo.show_image('tiff', 'deflate compressed', <<'ENDofIMG')
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ENDofIMG

if Tk::PLATFORM['platform'] != 'windows'
demo.show_image('other', 'postscript', <<'ENDofIMG')
%!PS-Adobe-3
%%Title: postscript.ps
%%BoundingBox: 66 648 146 720
%%Pages: 1
%%DocumentProcSets: Adobe_distill 0.96
%%EndComments
%%BeginProcSet: Adobe_distill 0.96
/PROLOGUE 30 40 add dict def
 % 30 procedure entries + room for 40 cached font dictionaries
 PROLOGUE begin
 /clip { } def    % causes problems. remove if "clip" is needed
 /bdef { bind def } bind def	/ldef { load def } bdef
 /T { moveto show } bdef	/A { moveto ashow } bdef
 /W { moveto widthshow } bdef	/AW { moveto awidthshow } bdef
 /f /fill ldef			/R { { rlineto } repeat } bdef
 /r /rlineto ldef		/L { { lineto } repeat } bdef
 /m /moveto ldef		/l { moveto lineto stroke } bdef
 /x { 0 rlineto } bdef		/y { 0 exch rlineto } bdef
 /c /curveto ldef		/cp /closepath ldef
 /s /stroke ldef		/w /setlinewidth ldef
 /g /setgray ldef		/j /setlinejoin ldef
 /d /setdash ldef		/F /setfont ldef
 /C /setcmykcolor where { /setcmykcolor get }{ %ifelse
   { %def
     1 sub 3 { 3 index add neg dup 0 lt { pop 0 } if 3 1 roll } repeat
     setrgbcolor
   } bind
 } ifelse def
 /selectfont where { pop }{ %ifelse
     /selectfont { exch findfont exch scalefont setfont } bdef
 } ifelse
 /MF { exch findfont exch makefont setfont } bdef
 /FF /selectfont ldef
 /DF { selectfont currentfont def } bdef
 /BEGINPAGE { pop /pagesave save def } bdef
 /ENDPAGE { pop pagesave restore showpage } def
 /REMAP { %def
   FontDirectory 2 index known { pop pop pop } { %ifelse
     findfont dup length dict begin
       { 1 index /FID ne {def}{pop pop} ifelse } forall
       exch dup length 0 gt { /Encoding exch def }{ pop } ifelse
     currentdict end definefont pop
   } ifelse
 } bdef
 /RECODE { %def
    3 -1 roll 1 index findfont /Encoding get 256 array copy exch
    0 exch { %forall
     dup type/nametype eq
       { 3 {2 index} repeat put pop 1 add }{ exch pop }ifelse
    } forall pop 3 1 roll REMAP
 } bdef
 end %PROLOGUE
%%EndProcSet: Adobe_distill 0.96
%%EndProlog
%%BeginSetup
PROLOGUE begin
%%EndSetup
%%Page: 1 1
1 BEGINPAGE
1 g
2 setlinecap
144 53 m
390 x
-19 y
-390 x
eofill
0 g
1.268 w
0 setlinecap
4 setmiterlimit
[] 0 d
109.698 714.182 m
111.525 713.672 112.472 713.234 113.624 712.431 c
-22.3128 -25.8381 r
97.4019 682.652 103.794 672.84 100.329 664.844 c
102.034 675.687 90.7436 683.82 84.1099 684.842 c
25.588 29.3407 r
f
1.0361 w
f
f
91.8805 654.468 m
96.0255 654.285 100.155 654.188 104.481 654.188 c
113.804 654.188 122.752 654.636 131.141 655.44 c
134.222 655.737 136.724 658.133 137.108 661.279 c
137.79 666.855 138.107 672.696 138.107 678.705 c
138.107 684.714 137.79 690.555 137.108 696.131 c
136.724 699.277 134.222 701.674 131.141 701.97 c
127.476 702.321 123.704 702.604 119.84 702.813 c
119.84 702.813 103.842 668.373 102.231 664.827 c
99.8549 659.595 96.601 655.765 91.8805 654.468 c
f
0.7851 w
77.8202 655.44 m
74.7171 655.948 72.2887 657.716 71.8525 661.279 c
71.1725 666.855 70.8549 672.696 70.8549 678.705 c
70.8549 684.714 71.1725 690.555 71.8525 696.131 c
72.2381 699.277 74.7417 701.674 77.8202 701.97 c
82.1335 702.383 86.5932 702.702 91.1764 702.916 c
8.16241 9.07727 r
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-28.4564 -32.9334 r
80.6983 681.906 98.7446 677.354 98.7446 666.708 c
98.7446 655.332 86.3243 654.054 77.8202 655.44 c
f
0.0843 w
139.67 644.154 m
140.194 644.154 140.619 644.576 140.619 645.098 c
140.619 645.619 140.194 646.042 139.67 646.042 c
139.146 646.042 138.721 645.619 138.721 645.098 c
138.721 644.576 139.146 644.154 139.67 644.154 c
1 ENDPAGE
%%Trailer
end %PROLOGUE
%%Pages: 1
%%EOF
ENDofIMG
end

if false
demo.show_image('other', 'pdf', <<'ENDofIMG')
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ENDofIMG
end

#######################

Tk.mainloop
