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|
%% This is file `novel-Images.sty', part of `novel' document class.
%% Copyright 2017-2023 Robert Allgeyer.
%%
%% This file may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, version 1.3c.
%% License URL: https://www.latex-project.org/lppl/lppl-1-3c/
%%
\ProvidesFile{novel-Images.sty}%
[2023/08/26 v1.82 LaTeX file (image placement)]
%%
%% In `novel', images are handled with a view to preserving uniform line grid.
%% Normally, a work of fiction has no (or very few) images within the main
%% body of text. Images are more likely on display pages (such as title page)
%% or in chapter starts, or maps.
%% There are two ways to place an image: inline, or float.
%% Inline image does not occupy its own block, but mingles with flowing text.
%% Float image occupies its own block, which will be placed where the command
%% is written, if it fits on that page. If it doesn't fit, then it will be
%% placed at the top of the following page. Surrounding text will be
%% typeset so at to not leave a big gap. Althouth TeX allows several
%% options for positioning a float, `novel' only allows one method.
%% Be sure to read the separate documentation about how to prepare images.
%% In general: (1) png or jpg only. (2) Flattened, no transparency.
%% (3) 300dpi (grayscale) or 600dpi (black/white) are industry norms.
%% (4) Image file must contain its resolution. (5) Exact size, without scaling.
%% (6) No private metadata. (7) Be sure grayscale is 1-channel, not rgb gray.
%% Luacode and related macro thanks to user Marcel Krüger,
%% at tex.stackexchange.com.
\RequirePackage{luacode}
\begin{luacode*}
function check_colorspaces(allowed_colorspace, name)
local doc = epdf.open(name);
if doc == nil then
tex.sprint(luatexbase.catcodetables['latex-package'],
"\\errmessage{Could not open " .. name .. "}{}{}\\@gobbletwo")
return;
else
for pageno=1,doc:getNumPages() do
local xobjs= doc:getCatalog():getPage(pageno):getResourceDict():lookup("XObject");
if not xobjs:isNull() then
for i=1,xobjs:dictGetLength() do
xobjDict = xobjs:dictGetVal(i):streamGetDict()
if xobjDict:lookup('Subtype'):getName() == 'Image' then
if not allowed_colorspace[xobjDict:lookup('ColorSpace'):getName()] then
tex.sprint(luatexbase.catcodetables['latex-package'], '\\@firstoftwo')
return
end
end
end
end
end
end
tex.sprint(luatexbase.catcodetables['latex-package'], '\\@secondoftwo')
return;
end
\end{luacode*}
%
\newcommand\PDFHasDisallowedColorspaceTF[1]{%
\directlua{check_colorspaces({DeviceCMYK=true, DeviceGray=true},"\luaescapestring{#1}")}%
}
%%
%%
\begin{luacode*}
function utf16to8(u16str)
local result = ""
local i = 1
if #u16str % 2 == 1 then
print("ERROR")
return
end
while i < #u16str do
local high, low = u16str:byte(i, i + 1)
i = i + 2
local current = bit32.replace(low, high, 8, 8)
if bit32.band(high, 0xFC) == 0xD8 then
current = bit32.replace(0, current, 10, 10)
if i > #u16str then
print("ERROR")
return
end
high, low = u16str:byte(i, i + 1)
i = i + 2
current = bit32.replace(current, bit32.replace(low, high, 8, 8), 0, 10) + 0x10000
elseif bit32.band(high, 0xFC) == 0xDC then
print("ERROR")
return
end
result = result .. unicode.utf8.char(current)
end
return result
end
function normalize_string(str)
if str:sub(1,2) == "\xFE\xFF" then
return utf16to8(str:sub(3,-3))
else
return str
end
end
function check_pdf_info(name, field, expected)
local doc = epdf.open(name);
if doc == nil then
tex.sprint(luatexbase.catcodetables['latex-package'],
"\\errmessage{Could not open " .. name .. "}{}{}\\@gobbletwo")
else
local producer = doc:getDocInfo():dictLookup(field)
if not producer:isNull() and normalize_string(producer:getString()) == expected then
tex.sprint(luatexbase.catcodetables['latex-package'], '\\@firstoftwo')
else
tex.sprint(luatexbase.catcodetables['latex-package'], '\\@secondoftwo')
end
end
end
\end{luacode*}
\newcommand\PDFVerifyInfoFieldTF[3]{\directlua{check_pdf_info("\luaescapestring{#1}", "\luaescapestring{#2}", "\luaescapestring{#3}")}}
%%
%%
\LetLtxMacro\@scriptincludepdf\includepdf\relax
\providecommand\includepdf[2][]{}
\renewcommand\includepdf[2][]{% from package `pdfpages'
\ClassError{novel}{Cannot use \string\includepdf\space command}%
{You can use novel-scripts `makegray' and `makebw' to convert pdf %%J%
to a raster jpg or png, suitable for placement as an image.}%
}
\gdef\ScriptCoverImage#1{%
\if@coverart%
\PDFVerifyInfoFieldTF{#1}{NSprocessed}{true}%
{\@scriptincludepdf{#1}}%
{\ClassError{novel}{Book cover pdf must be pre-processed by novel-scripts}%
{Each pdf processed by novel-scripts is marked internally. ^^J%
Your cover artwork pdf is unmarked. Use `makecmykpdf' script.}%
}%
\else%
\ClassError{novel}{Cannot use \string\ScriptCoverImage\space in interior}%
{\string\ScriptCoverImage\space only with `coverart' class option.}%
\fi%
} %
%%
% Pertains to images:
\newlength\imagewidth
\newlength\imageheight
\newlength\imagehoffset
\newlength\imagevoffset
\newlength\@imagewidth
\newlength\@imageheight
\newlength\@imagehoffset
\newlength\@imagevoffset
\newlength\@mytotalht
\newif \if@UsingNovelCommand % true within \InlineImage etc.
%%
\gdef\imagestarred{false}
\gdef\imagefilename{unknown}
\setkeys{Gin}{draft=false} % always shows the image, not a box outline
\LetLtxMacro\novel@sub@inclgr\includegraphics\relax
\if@coverart\else % Need to allow it, for possible use by \includepdf in cover.
\renewcommand\includegraphics[2][]{%
\ClassError{novel}{Direct use of \string\includegraphics\space forbidden}%
{You may only place images using commands specific to `novel' class. ^^J%
See `novel' documentation, section 7.}%
}
\fi
%
\newcommand\@TestImageExtension[1]{%
\@tempTFfalse%
\IfEndWith{#1}{.png}{\@tempTFtrue}{}%
\IfEndWith{#1}{.PNG}{\@tempTFtrue}{}%
\IfEndWith{#1}{.jpg}{\@tempTFtrue}{}%
\IfEndWith{#1}{.JPG}{\@tempTFtrue}{}%
\IfEndWith{#1}{.jpeg}{\@tempTFtrue}{}%
\IfEndWith{#1}{.JPEG}{\@tempTFtrue}{}%
\if@tempTF\else%
\ClassError{novel}{Image format `#1' not allowed, page \thepage}%
{Image `#1' has file type not allowed in `novel' class. ^^J%
Must have file extension png, jpg, jpeg (or capitalized). ^^J%
Others such as pdf, bmp, tiff, eps, svg, jp2, jbig, are not allowed. ^^J%
The file extension is mandatory. Provide it, if missing.}%
\fi%
} %
%%
%% INLINE IMAGE
%% ----------------------------------------------------------------------------
% \InlineImage[xoffset,yoffset]{imagename.png} or jpg
% As the name implies, an inline image is used within the flow of text, rather
% than in its own block. It may be used in main body, header, and footer.
% Macros such as \imagefilename, \imagewidth, etc.
% are only set or re-set when the image in in the body. That prevents an
% intervening header/footer image from over-writing values set by%
% the most recent body image.
% Without offsets, the image is positioned with is left edge at the cursor,
% and its top edge at the text baseline. Positive offsets are right and up.
% If improperly positioned, the image can overlie (obscure) text that was
% previously placed. This is rarely desirable and may be flagged by
% some print services, because it looks wrong.
% The image will underlie anything that follows. This may be used as a
% special effect, if allowed by the print service (probably OK).
% With the un-starred command, the image occupies its natural cursor width.
% With the starred command, the image occupies zero cursor width, so that
% anything following will overlie it.
\DeclareDocumentCommand \InlineImage { s O{0pt} m }{%
\@TestImageExtension{#3}%
\@tempTFfalse%
\if@pdfxSEToff%
\@tempTFtrue%
\else%
\IfSubStr*{\@UnknownImages}{#3}{\@tempTFtrue}{}%
\IfSubStr*{\@AllGoodImages}{#3}{\@tempTFtrue}{}%
\fi%
\if@tempTF\else\@NovelInspectImage{#3}\fi%
\StrDel{#2}{\space}[\@myila]%
\StrCut{\@myila}{,}{\@myilxa}{\@myilya}%
\ifthenelse{\equal{\@myilxa}{} \OR \equal{\@myilxa}{0}}{%
\def\@myilx{0pt}}{\def\@myilx{\@myilxa}%
}%
\ifthenelse{\equal{\@myilya}{} \OR \equal{\@myilya}{0}}{%
\def\@myily{0pt}}{\def\@myily{\@myilya}%
}%
\iftoggle{@inheadfoot}{}{\gdef\imagefilename{#3}}% for possible later use
\global\@UsingNovelCommandtrue%
\gdef\@mygraphic{\novel@sub@inclgr{#3}}%
\gdef\@mygraphicname{#3}%
\setlength\@imagewidth{\widthof{\@mygraphic}}%
\global\@imagewidth=\@imagewidth%
\iftoggle{@inheadfoot}{}{\setlength\imagewidth{\@imagewidth}}%
\setlength\@imageheight{\heightof{\@mygraphic}}%
\global\@imageheight=\@imageheight%
\iftoggle{@inheadfoot}{}{%
\setlength\imageheight{\@imageheight}%
\global\imageheight=\imageheight%
}%
%
\setlength\@imagehoffset{\@myilx}%
\IfBeginWith{\@myily}{b}{%
\StrDel[1]{\@myily}{b}[\temp@adjVoffseta]%
\ifthenelse{\equal{\temp@adjVoffseta}{} \OR \equal{\temp@adjVoffseta}{0}}{%
\def\temp@adjVoffset{0pt}}{\def\temp@adjVoffset{\temp@adjVoffseta}%
}%
\setlength\@imagevoffset{\temp@adjVoffset}%
}{%
\setlength\@imagevoffset{-\@imageheight}%
\addtolength\@imagevoffset{\@myily}%
}%
%
\IfBooleanTF{#1}%
% starred:
{%
\iftoggle{@inheadfoot}{}{\gdef\imagestarred{true}}%
\makebox[0pt][l]{%
\hspace{\@imagehoffset}%
\stake\smash{\raisebox{\@imagevoffset}{\@mygraphic}}%
}%
}%
% unstarred:
{%
\iftoggle{@inheadfoot}{}{\gdef\imagestarred{false}}%
\hspace{\@imagehoffset}%
\stake\smash{\raisebox{\@imagevoffset}{\@mygraphic}}%
}% end IfBooleanTF{#1}
\iftoggle{@inheadfoot}{}{\setlength\imagehoffset{\@imagehoffset}}%
\iftoggle{@inheadfoot}{}{\setlength\imagevoffset{\@imagevoffset}}%
\global\@UsingNovelCommandfalse%
} %
% end Inline Image
%%
%% FLOAT IMAGE (centered unless offset)
%% ----------------------------------------------------------------------------
% \FloatImage[floatmethod,xoffset,yoffset]{yourimagename.png} % or jpg
% This is a substitute for other floats. Does not require `float' package.
% Default: [ht,0pt,\nfs].
% Method ht attempts to place the image where the code is written. But if it
% doesn't fit on that page, it will float to the top of the next page.
% Method b attempts to place the image on the bottom of the page where the
% code is written. If not, it floats to the bottom of the next page.
% Allowed float methods: ht hb t b. Equivalent to LaTeX floats with !.
% Parsing the optional argument: comma-separated values, ignoring space.
% May be empty before or between commas.
% Example: [,,2em] is read as default method, xoffset 0pt, yoffset 2em.
% Example: [b] is valid, because a single value is read as method.
\providecommand*\floatlocation[2]{\@namedef{fps@#1}{#2}}
\floatlocation{figure}{!ht} % default
\gdef\ftype@figure{1} % mystery TeX code
\DeclareDocumentCommand \FloatImage { s O{ht} m } {% starred not in use
\iftoggle{@inheadfoot}{%
\ClassError{novel}{Cannot use \string\FloatImage\space in header/footer}%
{Header footer allow \string\InlineImage, but not \string\FloatImage.}%
}{}%
\@TestImageExtension{#3}%
\@tempTFfalse%
\if@pdfxSEToff%
\@tempTFtrue%
\else%
\IfSubStr*{\@UnknownImages}{#3}{\@tempTFtrue}{}%
\IfSubStr*{\@AllGoodImages}{#3}{\@tempTFtrue}{}%
\fi%
\if@tempTF\else\@NovelInspectImage{#3}\fi%
% Sadly, parsing with `xstring' involves roundabout code:
\StrDel{#2}{\space}[\@tempArgs]%
\StrCut{\@tempArgs}{,}{\@tempArgA}{\@tempArgX}%
\StrCut{\@tempArgX}{,}{\@tempArgB}{\@tempArgC}%
\ifthenelse{\equal{\@tempArgA}{}}{%
\def\@tempArgAa{ht}%
}{%
\def\@tempArgAa{\@tempArgA}%
}%
\ifthenelse{\equal{\@tempArgB}{0}\OR\equal{\@tempArgB}{}}{%
\def\@tempArgBb{0pt}%
}{%
\def\@tempArgBb{\@tempArgB}%
}%
\ifthenelse{\equal{\@tempArgC}{0}\OR\equal{\@tempArgC}{}}{%
\def\@tempArgCc{0pt}%
}{%
\def\@tempArgCc{\@tempArgC}%
}%
\StrDel{\@tempArgAa}{!}[\@tempArgAa]%
\@tempTFfalse%
\ifthenelse{\equal{\@tempArgAa}{ht}}{\@tempTFtrue}{}%
\ifthenelse{\equal{\@tempArgAa}{hb}}{\@tempTFtrue}{}%
\ifthenelse{\equal{\@tempArgAa}{t}}{\@tempTFtrue}{}%
\ifthenelse{\equal{\@tempArgAa}{b}}{\@tempTFtrue}{}%
\if@tempTF\else%
\ClassWarning{novel}{Incorrect position for \string\FloatImage, ^^J%
page \thepage. Default position ht substituted.}%
\fi%
\floatlocation{figure}{!\@tempArgAa}% enable current float method
%\vfil% One l.
\@float{figure}%
\@FloatImage{\@tempArgBb}{\@tempArgCc}{#3}%
\end@float\par%
\floatlocation{figure}{!ht}% restore default float method
\null%
\vspace{0.01pt plus 0pt minus 0.02pt} % caulk
} %
%
%% Environment @floatimagegap. Only used by \@FloatImage command.
% Creates a gap at fixed height, regardless of content.
% Needs to compensate for prior line depth.
\newcounter{@gaplines} % passes the argument down to environment end
\DeclareDocumentEnvironment {@floatimagegap} { m } {%
\par%
\null%
\vspace*{-\nbs}%
\begin{textblock*}{\textwidth}[0,0](0pt,0pt)%
\setcounter{@gaplines}{#1}%
\strut\par%
\vspace*{-\nbs}%
}{% close the environment:
\end{textblock*}%
\par%
\vspace*{#1\nbs}%
} %
%%
\DeclareDocumentCommand \@FloatImage { m m m }{% DO NOT CALL DIRECTLY
\global\@UsingNovelCommandtrue%
\gdef\@mygraphic{\novel@sub@inclgr{#3}}%
\gdef\@mygraphicname{#3}%
\gsetlength\@imagewidth{\widthof{\@mygraphic}}%
\gsetlength\@imageheight{\heightof{\@mygraphic}}%
\setlength\@imagehoffset{#1}%
\setlength\@imagevoffset{#2-\@imageheight+\normalXheight}%
\setlength\@mytotalht{\@imageheight+0.3\nbs}%
\FPdiv{\@mytotalhtN}{\strip@pt\@mytotalht}{\strip@pt\nbs}%
\FPadd{\@mytotalhtN}{\@mytotalhtN}{0.5}% round upward
\FPround{\@mytotalhtN}{\@mytotalhtN}{0}% to integer
\FPmin{\@allowmyoverflow}{\@mytotalhtN}{\@LinesPerPage}% not exceeding lpp
% If a full-page image is too tall for a page, standard TeX float will
% delay it until the time that floats are cleared, typically by \clearpage.
% That would probably be at the end of a chapter.
% In `novel' this behavior is hacked. Regardless of the image's actual
% height, it is treated as if its height does not exceed whatever will
% fit on a single page. Then, a full-page float will appear at the first
% opportunity, rather than being delayed. As a consquence, an oversized
% full-page float may overflow into the footer or bottom margin.
% To fix that (if it matters), you need to edit the image in graphics.
\begin{@floatimagegap}{\@allowmyoverflow}%
\vspace*{-\nfs}%
\null%
{\centering%
\makebox[0pt][l]{%
\hspace{\dimexpr\@imagehoffset-0.5\@imagewidth}%
\stake\smash{\raisebox{\@imagevoffset}{\@mygraphic}}%
}%
\par%
}%
\end{@floatimagegap}%
\global\@UsingNovelCommandfalse%
} %
% end Float Image
%%
%% WRAP IMAGE
% This is a shim to `wrapfig' package. Since `novel' uses its own method for
% placing images, environments defined in `wrapfig' cannot be used directly.
% \WrapImage[position]{image} % default position r
% Optional position is same as with `wrapfig':
% l r o i places image "exactly here", left, right, outside, inside.
% L R O I allows image to float.
% Since novel's \InlineImage normally can be over-written by following text,
% it needs an accompanying \rule to act as a strut.
%
\RequirePackage{wrapfig}
%
\DeclareDocumentCommand\WrapImage { O{r} m } {%
\begin{wrapfloat}{figure}{#1}{0pt}%
\InlineImage[0pt,\normalXheight]{#2}%
\rule[\dimexpr\normalXheight-\imageheight]{0pt}%
{\dimexpr\imageheight-\normalXheight+0.3\nfs}%
\end{wrapfloat}%
}%
\LetLtxMacro\wrapimage\WrapImage\relax
% end Wrap Image.
%%
%% Read file bytes as plain text, for later parsing.
% Output is comma-separated list of byte codes, decimal 0-255.
% Returns -1 if requested start is more than file size.
% Returns all bytes if requested number exceeds file size.
% Does not test if file exists; error if not found.
\DeclareDocumentCommand\novelgetbytes { m m m } {%
% filename, start byte number (0=beginning, e=up to end), number of bytes
\ifthenelse{\equal{#2}{e}}{% package xifthen
\long\edef\novelbytesare{%
\directlua{
inp = assert(io.open("#1", "rb"))
local e=inp:seek("end")
if #3>e+1 then
inp:seek("set")
local r=inp:read(e)
sep=""
for i,_ in string.bytes(r)
do
tex.sprint(sep)
sep=","
tex.sprint(i)
end
else
local b=e-2-math.min(e,#3)
local w=1+math.min(e,#3)
inp:seek("set",b)
local r=inp:read(w)
sep=""
for i,_ in string.bytes(r)
do
tex.sprint(sep)
sep=","
tex.sprint(i)
end
end
}%
}%
}{%
\long\edef\novelbytesare{%
\directlua{
inp = assert(io.open("#1", "rb"))
local e=inp:seek("end")
if #2>e then tex.sprint(-1) else
local w=math.min(#3,e-#2)
inp:seek("set",#2)
local r=inp:read(w)
sep=""
for i,_ in string.bytes(r)
do
tex.sprint(sep)
sep=","
tex.sprint(i)
end
end
}%
}%
}%
} % end @novelgetbytes
%%
% png bit depth is 8 for ordinary color or gray, 1 for b/w monochrome.
% Although png allows more than 8, `novel' does not.
\def\novelpngbitdepth#1{\novelgetbytes{#1}{24}{1}\novelbytesare}
% png color type: 0=grayscale (incl. b/w).
% `novel' only permits colortype 0 for non-color book interiors.
% other: 2=rgb, 3=indexed rgb, 4=gray alpha, 6=rgb alpha.
\def\novelpngcolortype#1{\novelgetbytes{#1}{25}{1}\novelbytesare}
%%
%%
% Examine png or jpg image for novel-make as comment:
% Known-good images, will not be inspected. Comma-separated list:
\newcommand\SetKnownGoodImages[1]{
\gdef\@KnownGoodImages{#1}
}
\SetKnownGoodImages{} % default empty
\gdef\@AllGoodImages{}
\gdef\@UnknownImages{}
%
\gdef\@GatherGoodImages{% called \AtBeginDocument by `novel.cls'.
\let\SetKnownGoodImages\relax
\xdef\@AllGoodImages{\@KnownGoodImages\space \@AllGoodImages}
\if@pdfxSEToff
\xdef\@AllGoodImages{\@KnownGoodImages}
\xdef\@UnknownImages{}
\fi
}
% This is the (decimal) code string:
\gdef\@novelmake{110,111,118,101,108,109,97,107,101}
%
\newcommand\@NovelInspectImage[1]{%
\StrRight{#1}{3}[\tempEXT]%
\ifthenelse{\equal{\tempEXT}{png} \OR \equal{\tempEXT}{PNG}}{%
\novelgetbytes{#1}{e}{256}%
}{% jpg or JPG:
\novelgetbytes{#1}{0}{256}%
}%
\IfSubStr{\novelbytesare}{\@novelmake}{%
\xdef\@AllGoodImages{\@AllGoodImages\space #1}%
}{%
\xdef\@UnknownImages{\@UnknownImages\space #1}%
}%
}
%%
%% Called \AfterEndDocument by `novel.cls`:
\long\gdef\@WarnUnknownImages{%
\@tempTFfalse%
\ifthenelse{\equal{\@UnknownImages}{}}{}{\@tempTFtrue}%
\if@pdfxSEToff\@tempTFfalse\fi%
\if@tempTF%
\typeout{^^JClass `novel' Alert: Some images not processed by scripts.^^J%
\space List of unprocessed images: \@UnknownImages ^^J%
\space Above list does not include any `known good' set by you. ^^J^^J}%
\ClassWarning{novel}{\@testintentional %
Some images may not meet PDF/X specifications. ^^J%
See near end of log file for `Some images not processed by scripts`. ^^J}%
\fi%
}
%%
%%
\endinput
%%
%% End of file `novel-Images.sty'.
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