diff options
author | Norbert Preining <preining@logic.at> | 2010-05-12 16:54:37 +0000 |
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committer | Norbert Preining <preining@logic.at> | 2010-05-12 16:54:37 +0000 |
commit | 661c41a09e39a182865e0b51e34cc995a0dc96e8 (patch) | |
tree | 2f79bb1406e22fdcb2587be8ffda6c0c609d7932 /Master/tlpkg/tlperl/lib/Imager/include/immacros.h | |
parent | b645030efc22e13c2498a1522083634ab91b2de1 (diff) |
move tlperl.straw to tlperl
git-svn-id: svn://tug.org/texlive/trunk@18210 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/tlpkg/tlperl/lib/Imager/include/immacros.h')
-rwxr-xr-x | Master/tlpkg/tlperl/lib/Imager/include/immacros.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Imager/include/immacros.h b/Master/tlpkg/tlperl/lib/Imager/include/immacros.h new file mode 100755 index 00000000000..9d5757445bf --- /dev/null +++ b/Master/tlpkg/tlperl/lib/Imager/include/immacros.h @@ -0,0 +1,33 @@ +/* + Imager "functions" implemented as macros + + I suppose these could go in imdatatypes, but they aren't types. +*/ +#ifndef IMAGER_IMMACROS_H_ +#define IMAGER_IMMACROS_H_ + +/* +=item i_img_has_alpha(im) + +=category Image Information + +Return true if the image has an alpha channel. + +=cut +*/ + +#define i_img_has_alpha(im) ((im)->channels == 2 || (im)->channels == 4) + +/* +=item i_img_color_channels(im) + +=category Image Information + +The number of channels holding color information. + +=cut +*/ + +#define i_img_color_channels(im) (i_img_has_alpha(im) ? (im)->channels - 1 : (im)->channels) + +#endif |