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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
commitcca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch)
tree146f39ded1c938019e1ed42d30923c2ac9e86789 /src/3rdparty/autotrace/quantize.h
parentInitial commit. (diff)
downloadinkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.tar.xz
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Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/3rdparty/autotrace/quantize.h')
-rw-r--r--src/3rdparty/autotrace/quantize.h52
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diff --git a/src/3rdparty/autotrace/quantize.h b/src/3rdparty/autotrace/quantize.h
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+/* quantize.h: Quantize a high color bitmap
+
+ Copyright (C) 2001, 2002 Martin Weber
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License
+ as published by the Free Software Foundation; either version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser 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. */
+
+#include "bitmap.h"
+#include "color.h"
+#include "exception.h"
+
+#ifndef QUANTIZE_H
+#define QUANTIZE_H
+
+#define PRECISION_R 7
+#define PRECISION_G 7
+#define PRECISION_B 7
+
+#define HIST_R_ELEMS (1<<PRECISION_R)
+#define HIST_G_ELEMS (1<<PRECISION_G)
+#define HIST_B_ELEMS (1<<PRECISION_B)
+
+#define MR HIST_G_ELEMS*HIST_B_ELEMS
+#define MG HIST_B_ELEMS
+
+typedef unsigned long ColorFreq;
+typedef ColorFreq *Histogram;
+
+typedef struct {
+ int desired_number_of_colors; /* Number of colors we will allow */
+ int actual_number_of_colors; /* Number of colors actually needed */
+ at_color cmap[256]; /* colormap created by quantization */
+ ColorFreq freq[256];
+ Histogram histogram; /* holds the histogram */
+} QuantizeObj;
+
+void quantize(at_bitmap *, long ncolors, const at_color * bgColor, QuantizeObj **, at_exception_type * exp);
+
+void quantize_object_free(QuantizeObj * obj);
+#endif /* NOT QUANTIZE_H */