1 /*
2  * Copyright (C) 2011  Rudolf Polzer   All Rights Reserved.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included
12  * in all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * RUDOLF POLZER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20  */
21 
22 #ifndef S2TC_COMPRESSOR_H
23 #define S2TC_COMPRESSOR_H
24 
25 // note: this is a C header file!
26 
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30 
31 enum DitherMode
32 {
33 	DITHER_NONE,
34 	DITHER_SIMPLE,
35 	DITHER_FLOYDSTEINBERG
36 };
37 
38 void rgb565_image(unsigned char *out, const unsigned char *rgba, int w, int h, int srccomps, int alphabits, DitherMode dither);
39 
40 enum DxtMode
41 {
42 	DXT1,
43 	DXT3,
44 	DXT5
45 };
46 enum RefinementMode
47 {
48 	REFINE_NEVER,
49 	REFINE_ALWAYS,
50 	REFINE_LOOP
51 };
52 
53 typedef enum
54 {
55 	RGB,
56 	YUV,
57 	SRGB,
58 	SRGB_MIXED,
59 	AVG,
60 	WAVG,
61 	W0AVG,
62 	NORMALMAP
63 } ColorDistMode;
64 
65 typedef void (*s2tc_encode_block_func_t) (unsigned char *out, const unsigned char *rgba, int iw, int w, int h, int nrandom);
66 s2tc_encode_block_func_t s2tc_encode_block_func(DxtMode dxt, ColorDistMode cd, int nrandom, RefinementMode refine);
67 
68 #ifdef __cplusplus
69 }
70 #endif
71 
72 #endif
73