%--------------------------------------------
%
% Package pgfplots
%
% Provides a user-friendly interface to create function plots (normal
% plots, semi-logplots and double-logplots).
%
% It is based on Till Tantau's PGF package.
%
% Copyright 2007-2012 by Christian Feuersänger.
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see .
%
%--------------------------------------------
%--------------------------------------------------
% \pgfqkeys{/pgfplots/surf shading}{
% cols=3,
% % test colormap 1,
% }
% \pgfplotslibrarysurfstreamstart
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{0pt}{10pt}}{0}
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{100pt}{10pt}}{100}
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{180pt}{10pt}}{30}
% %
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{0pt}{100pt}}{300}
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{110pt}{90pt}}{1000}
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{190pt}{110pt}}{600}
% %
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{0pt}{200pt}}{0}
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{110pt}{200pt}}{100}
% \pgfplotslibrarysurfstreamcoord{\pgfqpoint{190pt}{200pt}}{60}
% \pgfplotslibrarysurfstreamend
% \fbox{%
% \pgfplotslibrarysurfdraw
% }%
%--------------------------------------------------
\newif\ifpgfplotslibrarysurf@updatebb
\newif\ifpgfplotslibrarysurf@usecolormap
\pgfplotslibrarysurf@updatebbtrue
\pgfkeys{%
/pgfplots/surf shading/anchor/.initial=\pgfpointorigin,%
/pgfplots/surf shading/shading type/.initial=5,% triangles in form of lattice
%
% If this is true, the embedding picture's bounding box will be updated using
% the shading's bounding box.
% This bounding box may be (highly!) inaccurate for coons shadings and tensor product shadings.
% The 'patch' plot handler disables it and takes control over it explicitly (using interpolation
% points rather than bezier control points).
/pgfplots/surf shading/update BB/.is if=pgfplotslibrarysurf@updatebb,
%
% can only have values '' (empty) for binary encoding or
% ASCIIHexEncode for base 16 encoding. Use this if some driver
% cannot produce binary encoding. This is undocumented; for use in
% emergency only.
/pgfplots/surf shading/pdf stream filter/.initial=,%
%
/pgfplots/surf shading/precision/.is choice,
/pgfplots/surf shading/precision/pdf/.code={%
% Lossless coordinate output.
\def\pgfplotslibrarysurf@bitspercoordinate{32}%
\def\pgfplotslibrarysurf@bytespercoordinate{4}%
\def\pgfplotslibrarysurf@filter@encode{}% raw binary.
\def\pgfplotslibrarysurf@filter@decode{}%
},%
/pgfplots/surf shading/precision/ps/.code={%
% quantized coordinate output (introduces quantization error).
\def\pgfplotslibrarysurf@bitspercoordinate{24}%
\def\pgfplotslibrarysurf@bytespercoordinate{3}%
% doesn't improve behavior of pdf2ps:
%\def\pgfplotslibrarysurf@filter@encode{ASCIIHexEncode}%
%\def\pgfplotslibrarysurf@filter@decode{ASCIIHexDecode}%
\def\pgfplotslibrarysurf@filter@encode{}% raw binary.
\def\pgfplotslibrarysurf@filter@decode{}%
},%
/pgfplots/surf shading/precision/postscript/.style={%
/pgfplots/surf shading/precision/ps},%
/pgfplots/surf shading/precision/ps,%
% columns:
/pgfplots/surf shading/cols/.initial=,%
/pgfplots/surf shading/colorspace/.initial=rgb,% rgb or cmyk or gray
%
% the colormap. If this key is empty, we assume that individual
% color components are provided for EVERY vertex for which cdata
% is expected.
/pgfplots/surf shading/colormap/.initial={%
<<
/FunctionType 2
/Domain [0 1]
/C0 [0 0 1] /C1 [1 0 0] /N 1
>>
},%
/pgfplots/surf shading/test colormap 1/.style={%
/pgfplots/surf shading/colormap={
<<
/FunctionType 3
/Domain [0 1]
/Functions [
<<
/FunctionType 2
/Domain [0 1]
/C0 [0 0 1] /C1 [1 1 0] /N 1
>>
<<
/FunctionType 2
/Domain [0 1]
/C0 [1 1 0] /C1 [1 0.5 0] /N 1
>>
<<
/FunctionType 2
/Domain [0 1]
/C0 [1 0.5 0] /C1 [1 0 0] /N 1
>>
]
/Bounds [ 0.3 0.6 ]
/Encode [0 1 0 1 0 1]
%/Range [0 1 0 1 0 1] INCOMPATIBLE WITH ACROBAT 6.0
>>
}%
},%
/pgfplots/surf shading/debug text/.initial=\the\c@pgfplotslibrarysurf@no,
/pgfplots/surf shading/every debug coord/.style={
circle,
draw,
fill=yellow,
},
/pgfplots/surf shading/debug/.is choice,
/pgfplots/surf shading/debug/false/.code={%
\let\pgfplotslibrarysurfprocesscoordinate=\pgfplotslibrarysurfprocesscoordinate@orig
\let\pgfplotslibrarysurfusepath=\pgfplotslibrarysurfusepath@orig
},
/pgfplots/surf shading/debug/true/.code={%
\let\pgfplotslibrarysurfprocesscoordinate=\pgfplotslibrarysurfprocesscoordinate@debug
\def\pgfplotslibrarysurfusepath{\pgfusepath{stroke,fill}}
},
/pgfplots/surf shading/debug/.default=true,
}%
\def\pgfplotslibrarysurf@corner@sw{\pgfplots@error{This is unavailable until \string\pgfplotslibrarysurfstreamend}}
\let\pgfplotslibrarysurf@corner@ne\pgfplotslibrarysurf@corner@sw
% parametric colors (colormap) are always in [0,1000]. I
% 2 bytes suffice for that range.
\def\pgfplotslibrarysurf@bytespercomponent{2}%
\def\pgfplotslibrarysurf@bitspercomponent{16}%
\def\pgfplotslibrarysurf@decode{%
-16383.999992 16384 % see the docs of \pgfplotsbinaryencodedimenmaplinearly
-16383.999992 16384 %
\pgfplotslibrarysurf@decode@colors
}%
\def\pgfplotslibrarysurf@decode@colors@colormap{%
0 \pgfplotscolormappdfmax % map [0,2^BitsPerComponent-1] linearly to [0 1] for parametric color data
}%
\def\pgfplotslibrarysurf@decode@colors@explicit@one@component{%
% this is just one component for explicit color data.
% it will be replicated for every color component.
0 1 % the target value for color component values.
}%
\def\pgfplotslibrarysurf@count{0}%
\newcount\c@pgfplotslibrarysurf@no
% driver specific:
\def\pgfplotslibrarysurf@initstream{%
\edef\pgfplots@loc@TMPa{\pgfkeysvalueof{/pgfplots/surf shading/pdf stream filter}}%
\ifx\pgfplots@loc@TMPa\pgfutil@empty
\else
\let\pgfplotslibrarysurf@filter@encode=\pgfplots@loc@TMPa
\let\pgfplotslibrarysurf@filter@decode=\pgfplotslibrarysurf@filter@encode
\fi
}
\def\pgfplotslibrarysurf@advancestreamlen#1{}%
\def\pgfplotslibrarysurfstreamstart{%
\pgfplotslibrarysurfstreamstart@init@colors
\pgfkeysgetvalue{/pgfplots/surf shading/shading type}\pgfplotslibrarysurf@type
\pgfplotsapplistXglobalnewempty\pgfplotslibrarysurf@binarystream@accum
\pgfplotslibrarysurf@initstream
\ifx\pgfplotslibrarysurf@filter@encode\pgfutil@empty
\def\pgfplotslibrarysurf@filter@encode{binary encoding}%
\fi
\pgfkeysalso{/pgfplots/bin/\pgfplotslibrarysurf@filter@encode}%
%
\pgfplotsbinarysetbytes1%
\pgfplotsbinaryencodeunsigned{0}% use this method - it respects any special encodings.
\let\pgfplots@loc@TMPa=\pgfplotsbinaryresult
\ifcase\pgfplotslibrarysurf@type\relax
% 0
\pgfplotslibrarysurf@initstream@wrongtype
\or% 1
\pgfplotslibrarysurf@initstream@wrongtype
\or% 2
\pgfplotslibrarysurf@initstream@wrongtype
\or% 3
\or% 4
% ok, triangle meshes.
\let\pgfplotslibrarysurf@edgeflag=\pgfplots@loc@TMPa
\or% 5 triangles in lattice form. disable edge flag:
\let\pgfplotslibrarysurf@edgeflag=\pgfutil@empty
\or% 6 coons patches:
\global\let\pgfplotslibrarysurf@cubicpatch@cdata=\pgfutil@empty
\global\c@pgfplotslibrarysurf@no=0
\def\pgfplotslibrarysurf@cubicpatch@numverts{12}%
\let\pgfplotslibrarysurfstreamcoord=\pgfplotslibrarysurfstreamcoord@cubicpatch
\let\pgfplotslibrarysurf@edgeflag=\pgfplots@loc@TMPa
\or% 7 full tensor product cubic bezier patches:
\global\let\pgfplotslibrarysurf@cubicpatch@cdata=\pgfutil@empty
\global\c@pgfplotslibrarysurf@no=0
\def\pgfplotslibrarysurf@cubicpatch@numverts{16}%
\let\pgfplotslibrarysurfstreamcoord=\pgfplotslibrarysurfstreamcoord@cubicpatch
\let\pgfplotslibrarysurf@edgeflag=\pgfplots@loc@TMPa
\else
\pgfplotslibrarysurf@initstream@wrongtype
\fi
%
%
% we want to establish a bounding box for THIS shading only! Otherwise the pdf XFORM might have a larger bounding box than we want. Is that ok here? Or does it hurt somewhere?
\pgf@getpathsizes{\pgfplots@loc@TMPa}%
\global\let\pgfplotslibrarysurf@pathsizes@before=\pgfplots@loc@TMPa
}%
\def\pgfplotslibrarysurfstreamstart@init@colors{%
%
\pgfkeysgetvalue{/pgfplots/surf shading/colormap}\pgfplots@loc@TMPa
\ifx\pgfplots@loc@TMPa\pgfutil@empty
\pgfplotslibrarysurf@usecolormapfalse
\else
\pgfplotslibrarysurf@usecolormaptrue
\fi
%
\ifpgfplotslibrarysurf@usecolormap
\let\pgfplotslibrarysurf@decode@colors=\pgfplotslibrarysurf@decode@colors@colormap
\else
\pgfplotscolorspacegetcomponents{\pgfkeysvalueof{/pgfplots/surf shading/colorspace}}%
\c@pgf@counta=0 %
\c@pgf@countb=\pgfplotsretval\relax
%
\def\pgfplotslibrarysurf@decode@colors{}%
\pgfplotslibrarysurf@decode@colors@loop
\fi
%
\pgfplotslibrarysurf@translate@colorspace
\let\pgfplotslibrarysurf@colorspace=\pgfplotsretval
}%
\def\pgfplotslibrarysurf@decode@colors@loop{%
\ifnum\c@pgf@counta<\c@pgf@countb
%
\edef\pgfplotslibrarysurf@decode@colors{%
\pgfplotslibrarysurf@decode@colors
\pgfplotslibrarysurf@decode@colors@explicit@one@component
}%
\advance\c@pgf@counta by1 %
%
\expandafter\pgfplotslibrarysurf@decode@colors@loop
\fi
}%
\def\pgfplotslibrarysurf@initstream@wrongtype{%
\pgfplots@error{CRITICAL: shader=interp: got unsupported pdf shading type '\pgfplotslibrarysurf@type'. This may corrupt your pdf!}%
}%
\def\pgfplotslibrarysurfstreamend{%
\pgfplotsapplistXgloballet\pgfplotslibrarysurf@binarystream=\pgfplotslibrarysurf@binarystream@accum
\pgfplotsapplistXglobalnewempty\pgfplotslibrarysurf@binarystream@accum
%
\pgfplotslibrarysurfstreamend@set@BB
}
\def\pgfplotslibrarysurfdraw{%
\ifx\pgfplotslibrarysurf@binarystream\pgfutil@empty
\else
\pgfplotslibrarysurfdraw@sys
\fi
}%
\def\pgfplotslibrarysurfstreamend@set@BB{%
\xdef\pgfplotslibrarysurf@corner@sw{%
\global\pgf@x=\the\pgf@pathminx\space
\global\pgf@y=\the\pgf@pathminy\space
}%
\xdef\pgfplotslibrarysurf@corner@ne{%
\global\pgf@x=\the\pgf@pathmaxx\space
\global\pgf@y=\the\pgf@pathmaxy\space
}%
\pgf@setpathsizes\pgfplotslibrarysurf@pathsizes@before
}%
% ATTENTION: see also \pgfplotslibrarysurfstreamcoord@cubicpatch
% #1: a pgf point.
% #2: a color coordinate in the range [0,1000]
\def\pgfplotslibrarysurfstreamcoord#1#2{%
\pgfplotsbinarysetbytes\pgfplotslibrarysurf@bytespercoordinate%
\pgfplotslibrarysurf@advancestreamlen{\pgfplotslibrarysurf@bytespercoordinate}%
\pgfplotslibrarysurf@advancestreamlen{\pgfplotslibrarysurf@bytespercoordinate}%
%\pgf@process{#1}% this here causes `{retaining \pgf@x}' messages and pollutes the save stack! Avoid it. See \tracingrestores=2
\pgfplotslibrarysurfprocesscoordinate{#1}%
% The idea is to map
% the low-level point coordinates LINEARLY into [0,2^{8*}].
%
% This is what the pdf standard expects for surface shadings.
%
% To do that, we simply map
% [-16384,16384] linearly into [0,2^{32}]
% and write the resulting integer in big endian binary format to
% the pdf low level stream.
%
% The decode procedure tells the pdf viewer how to invert that
% stuff.
%
\pgf@xa=\pgf@x
\pgf@sys@bp@correct\pgf@xa%
\pgfplotsbinaryencodedimenmaplinearly\pgf@xa
%\message{POINT \the\c@pgfplots@scanlineindex: ENCODING(x=\the\pgf@x)=\pgfplotsbinaryresult.}\advance\c@pgfplots@scanlineindex by1
\t@pgfplots@toka=\expandafter{\pgfplotsbinaryresult}%
\pgf@ya=\pgf@y
\pgf@sys@bp@correct\pgf@ya%
\pgfplotsbinaryencodedimenmaplinearly\pgf@ya
%\message{ENCODING(y=\the\pgf@y)=\pgfplotsbinaryresult.}%
\t@pgfplots@tokb=\expandafter{\pgfplotsbinaryresult}%
%
\pgfplotslibrarysurf@encode@cdata{#2}%
%\message{\pgfplotsbinaryresult.}%
\t@pgfplots@tokc=\expandafter{\pgfplotsbinaryresult}%
\ifx\pgfplotslibrarysurf@edgeflag\pgfutil@empty
\else
% for shading type 4, the edge flag is given for EVERY
% coordinate (unlike all other shading types).
\pgfplotslibrarysurf@advancestreamlen{1}%
\fi
\edef\pgfplots@loc@TMPa{\pgfplotslibrarysurf@edgeflag\the\t@pgfplots@toka\the\t@pgfplots@tokb\the\t@pgfplots@tokc}%
\expandafter\pgfplotsapplistXglobalpushback\pgfplots@loc@TMPa\to\pgfplotslibrarysurf@binarystream@accum
}
% defines \pgfplotsbinaryresult to contain the result of a CDATA
% entry and advances the stream counters.
\def\pgfplotslibrarysurf@encode@cdata#1{%
\ifpgfplotslibrarysurf@usecolormap
\pgfplotslibrarysurf@map@to@FFF@colormap{#1}%
\else
% oh. No cdata. Ok, then encode stuff individually!
% We expect data of the form
% {}
\edef\pgfplots@loc@TMPa{#1}%
\def\pgfplotsretval{}%
\expandafter\pgfplotslibrarysurf@encode@cdata@loop\pgfplots@loc@TMPa,,%
\global\let\pgfplotsbinaryresult=\pgfplotsretval
\fi
}
\def\pgfplotslibrarysurf@encode@cdata@loop#1,{%
\def\pgfplots@loc@TMPa{#1}%
\ifx\pgfplots@loc@TMPa\pgfutil@empty
\else
%
%
\pgfplotslibrarysurf@map@to@FFF@component{#1}%
\edef\pgfplotsretval{\pgfplotsretval\pgfplotsbinaryresult}%
%
%
% continue loop:
\expandafter\pgfplotslibrarysurf@encode@cdata@loop
\fi
}%
% Defines \pgfplotsbinaryresult
\def\pgfplotslibrarysurf@map@to@FFF@colormap#1{%
\begingroup
% read fixed point input (in the range [0,1000]).
\pgf@xa=#1pt %
% convert to integer (= *65536):
\c@pgf@counta=\pgf@xa
% provide map [0,1000] -> [0,2^16-1]
\divide\c@pgf@counta by1000
% now, we have \c@pgf@counta in [0,2^16]. Simply strip it into
% the required range, that's ok.
\ifnum\c@pgf@counta<0
\c@pgf@counta=0
\else
\ifnum\c@pgf@counta>65535
\c@pgf@counta=65535
\fi
\fi
% Now, we have CDATA in the range [0,65535]
\xdef\pgfplots@glob@TMPa{\the\c@pgf@counta}%
%\message{ENCODING(C=\pgfplots@glob@TMPa\space for \the\pgf@xa)=}%
\endgroup
\pgfplotsbinarysetbytes\pgfplotslibrarysurf@bytespercomponent%
\pgfplotsbinaryencodeunsigned\pgfplots@glob@TMPa
\pgfplotslibrarysurf@advancestreamlen{\pgfplotslibrarysurf@bytespercomponent}%
}
% Defines \pgfplotsbinaryresult
\def\pgfplotslibrarysurf@map@to@FFF@component#1{%
\begingroup
% read fixed point input (in the range [0,1]).
\pgf@xa=#1pt %
% convert to integer (= *65536):
\c@pgf@counta=\pgf@xa
% provide map [0,1] -> [0,2^16-1]
% well, there is nothing to do! it was in [0,1], we multiplied by 65536 implicitly... that's it.
%
% now, we have \c@pgf@counta in [0,2^16]. Simply strip it into
% the required range, that's ok.
\ifnum\c@pgf@counta<0
\c@pgf@counta=0
\else
\ifnum\c@pgf@counta>65535
\c@pgf@counta=65535
\fi
\fi
% Now, we have CDATA in the range [0,65535]
\xdef\pgfplots@glob@TMPa{\the\c@pgf@counta}%
%\message{ENCODING(C=\pgfplots@glob@TMPa\space for \the\pgf@xa)=}%
\endgroup
\pgfplotsbinarysetbytes\pgfplotslibrarysurf@bytespercomponent%
\pgfplotsbinaryencodeunsigned\pgfplots@glob@TMPa
\pgfplotslibrarysurf@advancestreamlen{\pgfplotslibrarysurf@bytespercomponent}%
}
\def\pgfplotslibrarysurf@translate@colorspace{%
\pgfkeysgetvalue{/pgfplots/surf shading/colorspace}\pgfplots@loc@TMPd
\edef\pgfplots@loc@TMPd{\pgfplots@loc@TMPd}%
\def\pgfplots@loc@TMPa{rgb}%
\ifx\pgfplots@loc@TMPa\pgfplots@loc@TMPd
\def\pgfplotsretval{RGB}%
\else
\def\pgfplots@loc@TMPa{cmyk}%
\ifx\pgfplots@loc@TMPa\pgfplots@loc@TMPd
\def\pgfplotsretval{CMYK}%
\else
\def\pgfplots@loc@TMPa{cmy}%
\ifx\pgfplots@loc@TMPa\pgfplots@loc@TMPd
\def\pgfplotsretval{CMY}%
\else
\def\pgfplots@loc@TMPa{gray}%
\ifx\pgfplots@loc@TMPa\pgfplots@loc@TMPd
\def\pgfplotsretval{Gray}%
\else
\pgfplots@error{Sorry, the 'surfshading' lib failed to recognise the choice '/pgfplots/surf shading/colorspace=\pgfplots@loc@TMPd'... maybe you misspelled it?}%
\def\pgfplotsretval{RGB}%
\fi
\fi
\fi
\fi
}%
\def\pgfplotslibrarysurfusepath{\pgfusepath{fill}}
\let\pgfplotslibrarysurfusepath@orig=\pgfplotslibrarysurfusepath
% We DO want to protocol the size of the shading. In fact, we NEED a
% bounding box which contains the whole shading, otherwise it will be
% clipped. More precisely, it will be packed into a pdf XForm object
% and that appears to need a correct bounding box.
%
% But we do NOT want to update the picture's bounding box, only that
% of the pdf XForm. The picture's bounding box will be updated as soon
% as we *use* the shading anyway (in
% \pgfplotslibrarysurfdrawinpicture). This here takes care of that detail:
\def\pgfplotslibrarysurf@protocolsizes@#1#2{%
\ifpgf@relevantforpicturesize
\pgfplots@loc@tmptrue
\else
\pgfplots@loc@tmpfalse
\fi
\pgf@relevantforpicturesizefalse
\pgf@protocolsizes{#1}{#2}%
\ifpgfplots@loc@tmp
\pgf@relevantforpicturesizetrue
\fi
}%
\def\pgfplotslibrarysurfprocesscoordinate#1{%
#1\relax%
\pgfplotslibrarysurf@protocolsizes@{\pgf@x}{\pgf@y}%
}%
\let\pgfplotslibrarysurfprocesscoordinate@orig=\pgfplotslibrarysurfprocesscoordinate%
\def\pgfplotslibrarysurfprocesscoordinate@debug#1{%
\pgfinterruptpath
\scope
\pgftransformshift{#1}%
\node[/pgfplots/surf shading/every debug coord] at (0pt,0pt) {\pgfkeysvalueof{/pgfplots/surf shading/debug text}};%
\endscope
\endpgfinterruptpath
#1\relax%
\pgfplotslibrarysurf@protocolsizes@{\pgf@x}{\pgf@y}%
}%
% ATTENTION: see also \pgfplotslibrarysurfstreamcoord
% special routine for coons type patches and cubic tensor product type
% patches. It has FIRST all vertices,
% THEN the cdata. Furthermore, it only has 4 CDATA points, but a total
% of 12 vertices.
%
% #1: a pgf point.
% #2: a color coordinate in the range [0,1000]
\def\pgfplotslibrarysurfstreamcoord@cubicpatch#1#2{%
\pgfplotsbinarysetbytes\pgfplotslibrarysurf@bytespercoordinate%
\pgfplotslibrarysurf@advancestreamlen{\pgfplotslibrarysurf@bytespercoordinate}%
\pgfplotslibrarysurf@advancestreamlen{\pgfplotslibrarysurf@bytespercoordinate}%
%\pgf@process{#1}% this here causes `{retaining \pgf@x}' messages and pollutes the save stack! Avoid it. See \tracingrestores=2
\pgfplotslibrarysurfprocesscoordinate{#1}%
% The idea is to map
% the low-level point coordinates LINEARLY into [0,2^{8*}].
%
% This is what the pdf standard expects for surface shadings.
%
% To do that, we simply map
% [-16384,16384] linearly into [0,2^{32}]
% and write the resulting integer in big endian binary format to
% the pdf low level stream.
%
% The decode procedure tells the pdf viewer how to invert that
% stuff.
%
\pgf@xa=\pgf@x
\pgf@sys@bp@correct\pgf@xa%
\pgfplotsbinaryencodedimenmaplinearly\pgf@xa
%\message{POINT \the\c@pgfplots@scanlineindex: ENCODING(x=\the\pgf@x)=\pgfplotsbinaryresult.}\advance\c@pgfplots@scanlineindex by1
\t@pgfplots@toka=\expandafter{\pgfplotsbinaryresult}%
\pgf@ya=\pgf@y
\pgf@sys@bp@correct\pgf@ya%
\pgfplotsbinaryencodedimenmaplinearly\pgf@ya
%\message{ENCODING(y=\the\pgf@y)=\pgfplotsbinaryresult.}%
\t@pgfplots@tokb=\expandafter{\pgfplotsbinaryresult}%
\def\pgfplotslibrarysurf@cubicpatch@hascdata{0}%
\ifnum\c@pgfplotslibrarysurf@no=0
\def\pgfplotslibrarysurf@cubicpatch@hascdata{1}%
% prepend edge flag. it is a new patch.
\t@pgfplots@toka=\expandafter{\expandafter\pgfplotslibrarysurf@edgeflag\the\t@pgfplots@toka}%
\pgfplotslibrarysurf@advancestreamlen{1}%
\else
\ifnum\c@pgfplotslibrarysurf@no=3
\def\pgfplotslibrarysurf@cubicpatch@hascdata{1}%
\else
\ifnum\c@pgfplotslibrarysurf@no=6
\def\pgfplotslibrarysurf@cubicpatch@hascdata{1}%
\else
\ifnum\c@pgfplotslibrarysurf@no=9
\def\pgfplotslibrarysurf@cubicpatch@hascdata{1}%
\fi
\fi
\fi
\fi
\if1\pgfplotslibrarysurf@cubicpatch@hascdata
%
\pgfplotslibrarysurf@encode@cdata{#2}%
%\message{\pgfplotsbinaryresult.}%
\t@pgfplots@tokc=\expandafter{\pgfplotslibrarysurf@cubicpatch@cdata}%
\xdef\pgfplotslibrarysurf@cubicpatch@cdata{%
\the\t@pgfplots@tokc
\pgfplotsbinaryresult
}%
\fi
\global\advance\c@pgfplotslibrarysurf@no by1
%
\ifnum\pgfplotslibrarysurf@cubicpatch@numverts=\c@pgfplotslibrarysurf@no %finalize patch.
\t@pgfplots@tokc=\expandafter{\pgfplotslibrarysurf@cubicpatch@cdata}%
\global\let\pgfplotslibrarysurf@cubicpatch@cdata=\pgfutil@empty
\global\c@pgfplotslibrarysurf@no=0
\else
\t@pgfplots@tokc={}%
\fi
% edge flag is already in \t@pgfplots@toka (if this is the first
% vertex)
\edef\pgfplots@loc@TMPa{\the\t@pgfplots@toka\the\t@pgfplots@tokb\the\t@pgfplots@tokc}%
\expandafter\pgfplotsapplistXglobalpushback\pgfplots@loc@TMPa\to\pgfplotslibrarysurf@binarystream@accum
}
\def\pgfplotslibrarysurfactivateshadefill{%
\pgfplotssys@do@surfshading@fillpaths\pgfplots@loc@TMPa%
\expandafter\pgfutil@addpdfresource@patterns\expandafter{\pgfplots@loc@TMPa}%%
}
%--------------------------------------------------
% \def\pgfplotslibrarysurfdraw{%
% % \pgftext[at=\pgfqpoint{0pt}{0pt}]%
% {\pgfplotssys@do@surfshading}%
% }%
%--------------------------------------------------
\def\pgfplotslibrarysurfdrawinpicture{%
\begingroup
% this statement will modify both the picture's BB and the path's BB
% unless we take control.
%
% Note that the path's BB will eventually be updated into the
% picture's BB as well (meaning that 'overlay' is of no use inside
% of this group).
%
% Implement the 'surf shading/update BB' functionality here:
\let\pgfplots@@protocolsizes=\pgf@protocolsizes
\ifpgfplotslibrarysurf@updatebb
\else
% NO update to any BB. this implies 'overlay'
% *and* disables updates to the path's BB.
\def\pgf@protocolsizes##1##2{\relax}%
\fi
\pgftext[at=\pgfplotslibrarysurf@corner@sw,left,bottom] {%
\begingroup
% inside of this box, we *always* need bounding boxes.
% restore functionality.
\let\pgf@protocolsizes=\pgfplots@@protocolsizes
\pgfplotslibrarysurfdraw
\endgroup
% this does NOT work because I can't undo the box' shift:
%\pgfplotssys@do@surfshading
}%
\endgroup
}
\pgfplotsiffileexists{pgflibrarypgfplots.surfshading.\pgfsysdriver}{%
\input pgflibrarypgfplots.surfshading.\pgfsysdriver\relax
\def\pgflibrarysurfshadingifactive#1#2{#1}%
}{%
\def\pgfplotslibrarysurfdraw@sys{%
\pgfplots@error{Sorry, surfshading (shader=interp) is NOT available for the selected driver `\pgfsysdriver'.}%
}%
\def\pgflibrarysurfshadingifactive#1#2{#2}%
}
\endinput