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author | Matthew Barnes <mbarnes@redhat.com> | 2010-06-14 06:37:27 +0800 |
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committer | Matthew Barnes <mbarnes@redhat.com> | 2010-06-14 09:31:58 +0800 |
commit | e6972011f01eab9f8d0a4584f32ee1e2a00f3231 (patch) | |
tree | 69e2a5e846965c3b369724b825f5b35c6d88056a /libart_lgpl/art_filterlevel.h | |
parent | 7f3377c78a560aa762e04d596b79f847c4acd870 (diff) | |
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Embed libart_lgpl and libgnomecanvas.
Both of these modules are deprecated and going away in GNOME 3 but we
still rely heavily on them for GnomeCalendar and ETable. So, welcome
to the island of unwanted libraries...
Diffstat (limited to 'libart_lgpl/art_filterlevel.h')
-rw-r--r-- | libart_lgpl/art_filterlevel.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libart_lgpl/art_filterlevel.h b/libart_lgpl/art_filterlevel.h new file mode 100644 index 0000000000..1f4be484b4 --- /dev/null +++ b/libart_lgpl/art_filterlevel.h @@ -0,0 +1,68 @@ +/* Libart_LGPL - library of basic graphic primitives + * Copyright (C) 1998 Raph Levien + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifndef __ART_FILTERLEVEL_H__ +#define __ART_FILTERLEVEL_H__ + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +typedef enum { + ART_FILTER_NEAREST, + ART_FILTER_TILES, + ART_FILTER_BILINEAR, + ART_FILTER_HYPER +} ArtFilterLevel; + +/* NEAREST is nearest neighbor. It is the fastest and lowest quality. + + TILES is an accurate simulation of the PostScript image operator + without any interpolation enabled; each pixel is rendered as a tiny + parallelogram of solid color, the edges of which are implemented + with antialiasing. It resembles nearest neighbor for enlargement, + and bilinear for reduction. + + BILINEAR is bilinear interpolation. For enlargement, it is + equivalent to point-sampling the ideal bilinear-interpolated + image. For reduction, it is equivalent to laying down small tiles + and integrating over the coverage area. + + HYPER is the highest quality reconstruction function. It is derived + from the hyperbolic filters in Wolberg's "Digital Image Warping," + and is formally defined as the hyperbolic-filter sampling the ideal + hyperbolic-filter interpolated image (the filter is designed to be + idempotent for 1:1 pixel mapping). It is the slowest and highest + quality. + + Note: at this stage of implementation, most filter modes are likely + not to be implemented. + + Note: cubic filtering is missing from this list, because there isn't + much point - hyper is just as fast to implement and slightly better + in quality. + +*/ + + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* __ART_PATHCODE_H__ */ |