[latex3-commits] [l3svn] branch master updated: Support for bitmap interpolation

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joseph pushed a commit to branch master
in repository l3svn.

The following commit(s) were added to refs/heads/master by this push:
       new  f3d07a5   Support for bitmap interpolation
f3d07a5 is described below

commit f3d07a5ba33a8e58fffb9135db43b63b7c5539a1
Author: Joseph Wright <joseph.wright at morningstar2.co.uk>
Date:   Thu May 18 11:45:02 2017 +0100

    Support for bitmap interpolation
---
 l3kernel/l3drivers.dtx      |   23 +++++++++++++++++++----
 l3trial/l3image/l3image.dtx |   16 +++++++++++++---
 2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/l3kernel/l3drivers.dtx b/l3kernel/l3drivers.dtx
index 16d1704..3e80610 100644
--- a/l3kernel/l3drivers.dtx
+++ b/l3kernel/l3drivers.dtx
@@ -721,12 +721,17 @@
   {
     \int_zero:N \l__image_page_int
     \tl_clear:N \l__image_pagebox_tl
-    \tl_clear:N \l_@@_image_attr_tl
+    \tl_set:Nx \l_@@_image_attr_tl
+      {
+        \bool_if:NT \l__image_interpolate_bool
+          { :I }
+      }
     \@@_image_getbb_auxi:n {#1}
   }
 \cs_new_eq:NN \@@_image_getbb_png:n \@@_image_getbb_jpg:n
 \cs_new_protected:Npn \@@_image_getbb_pdf:n #1
   {
+    \bool_set_false:N \l__image_interpolate_bool
     \tl_set:Nx \l_@@_image_attr_tl
       {
         \int_compare:nNnT \l__image_page_int > 0
@@ -750,6 +755,8 @@
 \cs_new_protected:Npn \@@_image_getbb_auxii:n #1
   {
     \tex_immediate:D \pdftex_pdfximage:D
+      \bool_if:NT \l__image_interpolate_bool
+        { /Interpolate~true }
       \int_compare:nNnT \l__image_page_int > 0
         { page ~ \int_use:N \l__image_page_int }
       \tl_if_empty:NF \l__image_pagebox_tl
@@ -938,14 +945,18 @@
 %    \begin{macrocode}
 \cs_new_eq:NN \@@_image_getbb_eps:n \__image_read_bb:n
 %<*dvipdfmx>
-\cs_new_protected:Npn \@@_image_getbb_jpg:n
+\cs_new_protected:Npn \@@_image_getbb_jpg:n #1
   {
     \int_zero:N \l__image_page_int
     \tl_clear:N \l__image_pagebox_tl
-    \__image_extract_bb:n
+    \__image_extract_bb:n {#1}
   }
 \cs_new_eq:NN \@@_image_getbb_png:n \@@_image_getbb_jpg:n
-\cs_new_eq:NN \@@_image_getbb_pdf:n \__image_extract_bb:n
+\cs_new_protected:Npn \@@_image_getbb_pdf:n #1
+  {
+    \bool_set_false:N \l__image_interpolate_tl
+    \__image_extract_bb:n {#1}
+  }
 %</dvipdfmx>
 %    \end{macrocode}
 % \end{macro}
@@ -990,6 +1001,8 @@
           { :P \int_use:N \l__image_page_int }
         \tl_if_empty:NF \l__image_pagebox_tl
           { : \l__image_pagebox_tl }
+        \bool_if:NT \l__image_interpolate_bool
+           { :I }
       }
       {#1} {#2}
   }
@@ -1016,6 +1029,8 @@
         \tl_if_empty:NF \l__image_pagebox_tl
           { pagebox ~ \l__image_pagebox_tl \c_space_tl }
         (#1)
+        \bool_if:NT \l__image_interpolate_bool
+          { <</Interpolate~true>> }
       }
   }
 %    \end{macrocode}
diff --git a/l3trial/l3image/l3image.dtx b/l3trial/l3image/l3image.dtx
index f551a45..b7bb353 100644
--- a/l3trial/l3image/l3image.dtx
+++ b/l3trial/l3image/l3image.dtx
@@ -52,6 +52,10 @@
 %
 % \section{\pkg{l3image} documentation}
 %
+% \begin{variable}{interpolate}
+%   Indicates whether interpolation should be applied to bitmap image files.
+% \end{variable}
+%
 % \begin{variable}{page}
 %   The page number of an image to be used when including a multi-page image
 %   file. The value should be a positive integer.
@@ -71,6 +75,10 @@
 % which in themselves contain no driver-specific code. This functionality
 % is made available here.
 %
+% \begin{variable}[int]{\l__image_interpolate_bool}
+%   Indicates whether interpolation should be applied to bitmap image files.
+% \end{variable}
+%
 % \begin{variable}[int]{\l__image_page_int}
 %   The page to extract from a multi-page image file: used for |.pdf| files
 %   which may contain multiple pages.
@@ -168,15 +176,17 @@
 %
 % \subsection{Image feature support}
 %
-% \begin{macro}[int]{\l__image_page_int, \l__image_pagebox_tl}
+% \begin{macro}[int]
+%   {\l__image_interpolate_bool, \l__image_page_int, \l__image_pagebox_tl}
 %   Keys which control features of images. The somewhat odd order for
 %   |pagebox| matches that in the \pdfTeX{} manual (where the choices all
 %   have numerical values).
 %    \begin{macrocode}
 \keys_define:nn { image }
   {
-    page    .int_set:N  = \l__image_page_int   ,
-    pagebox .choices:nn =
+    interpolate .bool_set:N  = \l__image_interpolate_bool,
+    page        .int_set:N   = \l__image_page_int        ,
+    pagebox     .choices:nn  =
       { artbox, bleedbox , mediabox , trimbox }
       { \tl_set:Nn \l__image_pagebox_tl {#1} } ,
     pagebox / cropbox .code:n = { \tl_clear:N \l__image_pagebox_tl }

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