diff options
Diffstat (limited to 'jpeg/jmorecfg.h')
| -rw-r--r-- | jpeg/jmorecfg.h | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/jpeg/jmorecfg.h b/jpeg/jmorecfg.h index 679d68bdc..4638d6af2 100644 --- a/jpeg/jmorecfg.h +++ b/jpeg/jmorecfg.h @@ -2,7 +2,7 @@ * jmorecfg.h * * Copyright (C) 1991-1997, Thomas G. Lane. - * Modified 1997-2013 by Guido Vollbeding. + * Modified 1997-2022 by Guido Vollbeding. * This file is part of the Independent JPEG Group's software. * For conditions of distribution and use, see the accompanying README file. * @@ -351,8 +351,8 @@ typedef enum { FALSE = 0, TRUE = 1 } boolean; #define C_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */ #define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ -#define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/ -#define DCT_SCALING_SUPPORTED /* Input rescaling via DCT? (Requires DCT_ISLOW)*/ +#define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN) */ +#define DCT_SCALING_SUPPORTED /* Input rescaling via DCT? (Requires DCT_ISLOW) */ #define ENTROPY_OPT_SUPPORTED /* Optimization of entropy coding parms? */ /* Note: if you selected more than 8-bit data precision, it is dangerous to * turn off ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only @@ -369,8 +369,8 @@ typedef enum { FALSE = 0, TRUE = 1 } boolean; #define D_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */ #define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */ -#define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/ -#define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? (Requires DCT_ISLOW)*/ +#define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN) */ +#define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? (Requires DCT_ISLOW) */ #define SAVE_MARKERS_SUPPORTED /* jpeg_save_markers() needed? */ #define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */ #undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */ @@ -384,20 +384,31 @@ typedef enum { FALSE = 0, TRUE = 1 } boolean; /* * Ordering of RGB data in scanlines passed to or from the application. * If your application wants to deal with data in the order B,G,R, just - * change these macros. You can also deal with formats such as R,G,B,X - * (one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing - * the offsets will also change the order in which colormap data is organized. + * #define JPEG_USE_RGB_CUSTOM in jconfig.h, or define your own custom + * order in jconfig.h and #define JPEG_HAVE_RGB_CUSTOM. + * You can also deal with formats such as R,G,B,X (one extra byte per pixel) + * by changing RGB_PIXELSIZE. + * Note that changing the offsets will also change + * the order in which colormap data is organized. * RESTRICTIONS: * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats. * 2. The color quantizer modules will not behave desirably if RGB_PIXELSIZE - * is not 3 (they don't understand about dummy color components!). So you - * can't use color quantization if you change that value. + * is not 3 (they don't understand about dummy color components!). + * So you can't use color quantization if you change that value. */ +#ifndef JPEG_HAVE_RGB_CUSTOM +#ifdef JPEG_USE_RGB_CUSTOM +#define RGB_RED 2 /* Offset of Red in an RGB scanline element */ +#define RGB_GREEN 1 /* Offset of Green */ +#define RGB_BLUE 0 /* Offset of Blue */ +#else #define RGB_RED 0 /* Offset of Red in an RGB scanline element */ #define RGB_GREEN 1 /* Offset of Green */ #define RGB_BLUE 2 /* Offset of Blue */ +#endif #define RGB_PIXELSIZE 3 /* JSAMPLEs per RGB scanline element */ +#endif /* Definitions for speed-related optimizations. */ |