1 /*
2 * Copyright (c) 2001, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <math.h>
29 #include <string.h>
30
31 #include "colordata.h"
32 #include "jni.h"
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 JNIEXPORT extern sgn_ordered_dither_array std_img_oda_red;
39 JNIEXPORT extern sgn_ordered_dither_array std_img_oda_green;
40 JNIEXPORT extern sgn_ordered_dither_array std_img_oda_blue;
41 JNIEXPORT extern int std_odas_computed;
42
43 JNIEXPORT void JNICALL
44 make_dither_arrays(int cmapsize, ColorData *cData);
45
46 JNIEXPORT void JNICALL
47 initInverseGrayLut(int* prgb, int rgbsize, ColorData* cData);
48
49 /*
50 * state info needed for breadth-first recursion of color cube from
51 * initial palette entries within the cube
52 */
53
54 typedef struct {
55 unsigned int depth;
56 unsigned int maxDepth;
57
58 unsigned char *usedFlags;
59 unsigned int activeEntries;
60 unsigned short *rgb;
61 unsigned char *indices;
62 unsigned char *iLUT;
63 } CubeStateInfo;
64
65 #define INSERTNEW(state, rgb, index) do { \
66 if (!state.usedFlags[rgb]) { \
67 state.usedFlags[rgb] = 1; \
68 state.iLUT[rgb] = index; \
69 state.rgb[state.activeEntries] = rgb; \
70 state.indices[state.activeEntries] = index; \
71 state.activeEntries++; \
72 } \
73 } while (0);
74
75
76 #define ACTIVATE(code, mask, delta, state, index) do { \
77 if (((rgb & mask) + delta) <= mask) { \
78 rgb += delta; \
79 INSERTNEW(state, rgb, index); \
80 rgb -= delta; \
81 } \
82 if ((rgb & mask) >= delta) { \
83 rgb -= delta; \
84 INSERTNEW(state, rgb, index); \
85 rgb += delta; \
86 } \
87 } while (0);
88
89 #ifdef __cplusplus
90 } /* extern "C" */
91 #endif