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authorKarl Berry <karl@freefriends.org>2006-01-09 01:01:02 +0000
committerKarl Berry <karl@freefriends.org>2006-01-09 01:01:02 +0000
commit4a6fbdc0e89fde6f9efcaa24de3db8e137da4404 (patch)
treeefe2b5d7e2f07d6ce478982a9b1e5f43d41cb56c /Master/texmf-dist/dvips/pst-ghsb
parent524dc4b7a5d60a1c703450ac6fd3749ffe81afa3 (diff)
trunk/Master/texmf-dist/dvips
git-svn-id: svn://tug.org/texlive/trunk@88 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/dvips/pst-ghsb')
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diff --git a/Master/texmf-dist/dvips/pst-ghsb/pst-ghsb.pro b/Master/texmf-dist/dvips/pst-ghsb/pst-ghsb.pro
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+%!
+% -*- Mode: Postscript -*-
+% pst-ghsb.pro --- PostScript header file pst-ghsb.pro
+% For the PSTricks HSB mode gradient fillstyle
+% Based on pst-grad.pro from Timothy van Zandt
+% Syntax:
+% H0 S0 B0 H1 S1 B1 MidPoint NumLines Angle GradientFillHSB
+%
+% Author : Denis GIROU (CNRS/IDRIS - France) <Denis.Girou@idris.fr>
+% Created the : Tue May 13 11:12:36 1997
+% Version : 1.0
+% Last mod. by : Denis GIROU (CNRS/IDRIS - France) <Denis.Girou@idris.fr>
+% Last mod. the : Wed May 14 18:48:03 1997
+%
+
+% Syntax:
+% H0 S0 B0 H1 S1 B1 NumLines MidPoint Angle GradientFillHSB
+
+/tx@GradientHSBDict 40 dict def
+tx@GradientHSBDict begin
+/GradientFillHSB {
+ rotate
+ /MidPoint ED
+ /NumLines ED
+ /LastBrightness ED
+ /LastSaturation ED
+ /LastHue ED
+ /FirstBrightness ED
+ /FirstSaturation ED
+ /FirstHue ED
+ % This avoids gaps due to rounding errors:
+ clip
+ pathbbox %leave llx,lly,urx,ury on stack
+ /y ED /x ED
+ 2 copy translate
+ y sub neg /y ED
+ x sub neg /x ED
+ % This avoids gaps due to rounding errors:
+ LastHue FirstHue add 2 div
+ LastSaturation FirstSaturation add 2 div
+ LastBrightness FirstBrightness add 2 div
+ sethsbcolor
+ fill
+ /YSizePerLine y NumLines div def
+ /CurrentY 0 def
+ /MidLine NumLines 1 MidPoint sub mul abs cvi def
+ MidLine NumLines 2 sub gt
+ { /MidLine NumLines def }
+ { MidLine 2 lt { /MidLine 0 def } if }
+ ifelse
+ MidLine 0 gt
+ {
+ /Hue FirstHue def
+ /Saturation FirstSaturation def
+ /Brightness FirstBrightness def
+ /HueIncrement LastHue FirstHue sub MidLine 1 sub div def
+ /SaturationIncrement LastSaturation FirstSaturation sub MidLine 1 sub
+ div def
+ /BrightnessIncrement LastBrightness FirstBrightness sub MidLine 1 sub
+ div def
+ MidLine { GradientLoopHSB } repeat
+ } if
+ MidLine NumLines lt
+ {
+ /Hue LastHue def
+ /Saturation LastSaturation def
+ /Brightness LastBrightness def
+ /HueIncrement FirstHue LastHue sub NumLines MidLine sub 1 sub div def
+ /SaturationIncrement FirstSaturation LastSaturation sub
+ NumLines MidLine sub 1 sub div def
+ /BrightnessIncrement FirstBrightness LastBrightness sub
+ NumLines MidLine sub 1 sub div def
+ NumLines MidLine sub { GradientLoopHSB } repeat
+ } if
+} def
+/GradientLoopHSB {
+ 0 CurrentY moveto
+ x 0 rlineto
+ 0 YSizePerLine rlineto
+ x neg 0 rlineto
+ closepath
+ Hue Saturation Brightness sethsbcolor fill
+ /CurrentY CurrentY YSizePerLine add def
+ /Brightness Brightness BrightnessIncrement add def
+ /Saturation Saturation SaturationIncrement add def
+ /Hue Hue HueIncrement add def
+} def
+
+end
+% END pst-ghsb.pro