XEmacs 21.2-b1

[chise/xemacs-chise.git.1] / src / imgproc.h

diff --git a/src/imgproc.h b/src/imgproc.h
new file mode 100644 (file)
index 0000000..2164268
--- /dev/null
+++ b/src/imgproc.h
@@ -0,0 +1,62 @@
+/* Image processing aux functions header file
+   Copyright (C) 1998 Jareth Hein
+
+This file is a part of XEmacs
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Synched up with: Not in FSF. */
+
+/* Original author: Jareth Hein */
+
+#define        MAX_CMAP_SIZE   256
+#define        COLOR_DEPTH     8
+#define        MAX_COLOR       256
+
+#define        B_DEPTH         5               /* # bits/pixel to use */
+#define        B_LEN           (1L<<B_DEPTH)
+
+#define        C_DEPTH         2
+#define        C_LEN           (1L<<C_DEPTH)   /* # cells/color to use */
+
+#define        COLOR_SHIFT     (COLOR_DEPTH-B_DEPTH)
+
+typedef        struct colorbox {
+       struct  colorbox *next, *prev;
+       int     rmin, rmax;
+       int     gmin, gmax;
+       int     bmin, bmax;
+       int     total;
+} Colorbox;
+
+typedef struct {
+       int     num_ents;
+       int     entries[MAX_CMAP_SIZE][2];
+} C_cell;
+
+typedef struct {
+  unsigned short rm[MAX_CMAP_SIZE], gm[MAX_CMAP_SIZE], bm[MAX_CMAP_SIZE]; /* map values */
+  int um[MAX_CMAP_SIZE]; /* usage counts for each mapentry */
+  int histogram[B_LEN][B_LEN][B_LEN]; 
+  int num_active_colors;
+  Colorbox *freeboxes; /* used and freed internally */
+  Colorbox *usedboxes; /* used and freed internally */
+  C_cell **ColorCells; /* used and freed internally */
+} quant_table;
+
+#define QUANT_GET_COLOR(qt,r,g,b) (qt->histogram[r>>COLOR_SHIFT][g>>COLOR_SHIFT][b>>COLOR_SHIFT])
+
+quant_table *build_EImage_quantable(unsigned char *eimage, int width, int height, int num_colors);