Import sources from 2011-03-30 iso image - sys/lib

1 files changed, 248 insertions, 0 deletions

diff --git a/sys/lib/ghostscript/gs_devcs.ps b/sys/lib/ghostscript/gs_devcs.ps
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+%    Copyright (C) 2002 Aladdin Enterprises.  All rights reserved.
+% 
+% This software is provided AS-IS with no warranty, either express or
+% implied.
+% 
+% This software is distributed under license and may not be copied,
+% modified or distributed except as expressly authorized under the terms
+% of the license contained in the file LICENSE in this distribution.
+% 
+% For more information about licensing, please refer to
+% http://www.ghostscript.com/licensing/. For information on
+% commercial licensing, go to http://www.artifex.com/licensing/ or
+% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
+% San Rafael, CA  94903, U.S.A., +1(415)492-9861.
+
+% $Id: gs_devcs.ps,v 1.7 2005/09/12 11:34:50 leonardo Exp $
+% Device-specific color space method dictionaries.
+
+%
+% This file implements the method dictionaries for the Device-specific
+% color spaces. See gs_cspace.ps for information.
+%
+% Note that, because these color spaces are parameter-less, no color
+% space validation is required: if we can get to the color space methods,
+% we know the color space is legitimate.
+%
+% The colorspace substitution routines for these color spaces
+% (cs_substitute) will fail in a Level 1 system, but this is not a
+% problem as .getuseciecolor will always return false for such systems.
+%
+.currentglobal true .setglobal
+.cspace_util begin
+
+%
+%   <r>  <g>  <b>   rgb_2_gray   <gray>
+%
+% Convert RGB colors to gray. This includes a special check for
+% r == g == b, and avoids roundoff error if this is the case.
+%
+/rgb_2_gray
+  {
+    3 copy 1 index eq 3 1 roll eq and
+      { pop pop }
+      { .11 mul exch .59 mul add exch .3 mul add }
+    ifelse
+  }
+bind def
+
+systemdict /..page_default_spaces 3 dict put
+
+% <color_space_name> ..includecolorspace -
+/..includecolorspace
+{ % Only includes ones explicitly defined by the document.
+  systemdict /..page_default_spaces get 1 index known {
+    pop
+  } {
+    mark exch
+    { dup /ColorSpace resourcestatus {
+        pop 0 eq {
+          systemdict /..page_default_spaces get 1 index //true put
+          gsave
+          { dup /ColorSpace findresource //_setcolorspace_nosub exec .includecolorspace
+          } stopped pop
+          grestore
+        } if
+      } if
+    } stopped pop
+    cleartomark
+  } ifelse
+} bind def
+
+% <color_space> <color_space_name> cs_substitute_generic <color_space1> <color_space2>
+/cs_substitute_generic
+{ .getuseciecolor
+    { NOSUBSTDEVICECOLORS 
+        { //..includecolorspace exec dup }
+        { /ColorSpace findresource }
+      ifelse
+    }
+    { pop dup }
+  ifelse
+}
+bind def
+
+% <color_space> <color_space_name> cs_substitute_DeviceRGB_for_PDFX <color_space1> <color_space2>
+/cs_substitute_DeviceRGB_for_PDFX
+{ systemdict /PDFX .knownget not { false } if {
+    dup /ColorSpace resourcestatus {
+      pop pop
+    } {
+      (Error: Need a /DefaultRGB /ColorSpace resource for generating a PDF/X document.) =
+      /cs_substitute_DeviceRGB_for_PDFX /undefined signalerror
+    } ifelse
+    /ColorSpace findresource
+  } {
+    //cs_substitute_generic exec
+  } ifelse   
+} bind def
+
+colorspacedict
+
+dup
+/DeviceGray
+  mark
+    /cs_potential_indexed_base true
+    /cs_potential_pattern_base true
+    /cs_potential_alternate true
+    /cs_potential_icc_alternate true
+    /cs_get_ncomps //ncomps_1
+    /cs_get_range  //get_range_1
+    /cs_get_default_color { pop 0 } bind
+    /cs_get_currentgray //pop_1
+    /cs_get_currentrgb { pop dup dup } bind
+    /cs_get_currentcmyk { pop 1 exch sub 0 0 0 4 -1 roll } bind
+    /cs_validate {}
+
+    /cs_substitute
+      { /DefaultGray //cs_substitute_generic exec
+      }
+    bind
+
+    /cs_prepare {}
+    /cs_install { pop 0 .setdevcspace } bind
+    /cs_prepare_color //validate_1
+    /cs_complete_setcolor //pop_1
+  .dicttomark
+put
+
+
+/DeviceRGB
+  mark
+    /cs_potential_indexed_base true
+    /cs_potential_pattern_base true
+    /cs_potential_alternate true
+    /cs_potential_icc_alternate true
+    /cs_get_ncomps //ncomps_3
+    /cs_get_range  //get_range_3
+    /cs_get_default_color { pop 0 0 0 } bind
+    /cs_get_currentgray { pop //rgb_2_gray exec } bind
+    /cs_get_currentrgb //pop_1
+
+    % to convert to cmyk use blackgeneration and undercolorremoval
+    /cs_get_currentcmyk
+      {
+        pop
+
+        % convert to subtractive (CMY) color space
+        3
+          { 1 exch sub 3 1 roll }
+        repeat
+
+        % find the minimum (initial k component)
+        3 copy
+        2
+          {
+            2 copy gt
+              { exch }
+            if
+            pop
+          }
+        repeat
+
+        % apply undercolorremoval
+        dup 5 1 roll currentundercolorremoval exec 4 1 roll
+        3
+          { 3 index sub //bound_0_1 exec 3 1 roll }
+        repeat
+
+        % apply blackgeneration
+        5 3 roll pop currentblackgeneration exec //bound_0_1 exec
+      }
+    bind
+
+    /cs_validate {}
+
+    /cs_substitute
+      { /DefaultRGB //cs_substitute_DeviceRGB_for_PDFX exec
+      }
+    bind
+
+    /cs_prepare {}
+    /cs_install { pop 1 .setdevcspace } bind
+    /cs_prepare_color //validate_3
+    /cs_complete_setcolor //pop_1
+  .dicttomark
+put
+
+end     % .cspace_util
+.setglobal
+
+
+% Only create the DeviceCMYK color space if setcolorscreen is present
+/setcolorscreen where
+  { pop }
+  { currentfile closefile }
+ifelse
+
+
+.currentglobal true .setglobal
+.cspace_util begin
+
+colorspacedict
+/DeviceCMYK
+  mark
+    /cs_potential_indexed_base true
+    /cs_potential_pattern_base true
+    /cs_potential_alternate true
+    /cs_potential_icc_alternate true
+    /cs_get_ncomps //ncomps_4
+    /cs_get_range  //get_range_4
+    /cs_get_default_color { pop 0 0 0 1 } bind
+
+    /cs_get_currentgray
+      { pop 4 1 roll //rgb_2_gray exec add 1 exch sub //bound_0_1 exec }
+    bind
+
+    /cs_get_currentrgb 
+      {
+        pop
+        4 1 roll 3
+          { 3 index add  1 exch sub //bound_0_1 exec 3 1 roll }
+        repeat
+        4 -1 roll pop
+      }
+    bind
+
+    /cs_get_currentcmyk //pop_1
+
+    /cs_validate {}
+
+    /cs_substitute
+      { /DefaultCMYK //cs_substitute_generic exec
+      }
+    bind
+
+    /cs_prepare {}
+    /cs_install { pop 2 .setdevcspace } bind
+    /cs_prepare_color //validate_4
+    /cs_complete_setcolor //pop_1
+  .dicttomark
+put
+
+currentdict /..includecolorspace .undef
+currentdict /cs_substitute_generic .undef
+
+end     % .cspace_util
+.setglobal
+