Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * jdcolor.c |
| 3 | * |
DRC | a73e870 | 2012-12-31 02:52:30 +0000 | [diff] [blame] | 4 | * This file was part of the Independent JPEG Group's software: |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 5 | * Copyright (C) 1991-1997, Thomas G. Lane. |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 6 | * Modified 2011 by Guido Vollbeding. |
DRC | a6ef282 | 2013-09-28 03:23:49 +0000 | [diff] [blame] | 7 | * libjpeg-turbo Modifications: |
DRC | cf763c0 | 2013-01-01 09:51:37 +0000 | [diff] [blame] | 8 | * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
DRC | 0e94025 | 2015-01-20 10:33:32 +0000 | [diff] [blame] | 9 | * Copyright (C) 2009, 2011-2012, 2014-2015, D. R. Commander. |
DRC | 78df2e6 | 2014-05-12 09:23:57 +0000 | [diff] [blame] | 10 | * Copyright (C) 2013, Linaro Limited. |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 11 | * For conditions of distribution and use, see the accompanying README file. |
| 12 | * |
| 13 | * This file contains output colorspace conversion routines. |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 14 | */ |
| 15 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 16 | #define JPEG_INTERNALS |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 17 | #include "jinclude.h" |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 18 | #include "jpeglib.h" |
Pierre Ossman | 59a3938 | 2009-03-09 13:15:56 +0000 | [diff] [blame] | 19 | #include "jsimd.h" |
DRC | ff6961f | 2014-04-20 09:17:11 +0000 | [diff] [blame] | 20 | #include "jconfigint.h" |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 21 | |
| 22 | |
| 23 | /* Private subobject */ |
| 24 | |
| 25 | typedef struct { |
| 26 | struct jpeg_color_deconverter pub; /* public fields */ |
| 27 | |
| 28 | /* Private state for YCC->RGB conversion */ |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 29 | int * Cr_r_tab; /* => table for Cr to R conversion */ |
| 30 | int * Cb_b_tab; /* => table for Cb to B conversion */ |
| 31 | INT32 * Cr_g_tab; /* => table for Cr to G conversion */ |
| 32 | INT32 * Cb_g_tab; /* => table for Cb to G conversion */ |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 33 | |
| 34 | /* Private state for RGB->Y conversion */ |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 35 | INT32 * rgb_y_tab; /* => table for RGB to Y conversion */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 36 | } my_color_deconverter; |
| 37 | |
| 38 | typedef my_color_deconverter * my_cconvert_ptr; |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 39 | |
| 40 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 41 | /**************** YCbCr -> RGB conversion: most common case **************/ |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 42 | /**************** RGB -> Y conversion: less common case **************/ |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 43 | |
| 44 | /* |
| 45 | * YCbCr is defined per CCIR 601-1, except that Cb and Cr are |
| 46 | * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5. |
| 47 | * The conversion equations to be implemented are therefore |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 48 | * |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 49 | * R = Y + 1.40200 * Cr |
| 50 | * G = Y - 0.34414 * Cb - 0.71414 * Cr |
| 51 | * B = Y + 1.77200 * Cb |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 52 | * |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 53 | * Y = 0.29900 * R + 0.58700 * G + 0.11400 * B |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 54 | * |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 55 | * where Cb and Cr represent the incoming values less CENTERJSAMPLE. |
Thomas G. Lane | 88aeed4 | 1992-12-10 00:00:00 +0000 | [diff] [blame] | 56 | * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 57 | * |
| 58 | * To avoid floating-point arithmetic, we represent the fractional constants |
Thomas G. Lane | 88aeed4 | 1992-12-10 00:00:00 +0000 | [diff] [blame] | 59 | * as integers scaled up by 2^16 (about 4 digits precision); we have to divide |
| 60 | * the products by 2^16, with appropriate rounding, to get the correct answer. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 61 | * Notice that Y, being an integral input, does not contribute any fraction |
| 62 | * so it need not participate in the rounding. |
| 63 | * |
| 64 | * For even more speed, we avoid doing any multiplications in the inner loop |
| 65 | * by precalculating the constants times Cb and Cr for all possible values. |
Thomas G. Lane | 88aeed4 | 1992-12-10 00:00:00 +0000 | [diff] [blame] | 66 | * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table); |
| 67 | * for 12-bit samples it is still acceptable. It's not very reasonable for |
| 68 | * 16-bit samples, but if you want lossless storage you shouldn't be changing |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 69 | * colorspace anyway. |
| 70 | * The Cr=>R and Cb=>B values can be rounded to integers in advance; the |
| 71 | * values for the G calculation are left scaled up, since we must add them |
| 72 | * together before rounding. |
| 73 | */ |
| 74 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 75 | #define SCALEBITS 16 /* speediest right-shift on some machines */ |
| 76 | #define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) |
| 77 | #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 78 | |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 79 | /* We allocate one big table for RGB->Y conversion and divide it up into |
| 80 | * three parts, instead of doing three alloc_small requests. This lets us |
| 81 | * use a single table base address, which can be held in a register in the |
| 82 | * inner loops on many machines (more than can hold all three addresses, |
| 83 | * anyway). |
| 84 | */ |
| 85 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 86 | #define R_Y_OFF 0 /* offset to R => Y section */ |
| 87 | #define G_Y_OFF (1*(MAXJSAMPLE+1)) /* offset to G => Y section */ |
| 88 | #define B_Y_OFF (2*(MAXJSAMPLE+1)) /* etc. */ |
| 89 | #define TABLE_SIZE (3*(MAXJSAMPLE+1)) |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 90 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 91 | |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 92 | /* Include inline routines for colorspace extensions */ |
| 93 | |
| 94 | #include "jdcolext.c" |
| 95 | #undef RGB_RED |
| 96 | #undef RGB_GREEN |
| 97 | #undef RGB_BLUE |
| 98 | #undef RGB_PIXELSIZE |
| 99 | |
| 100 | #define RGB_RED EXT_RGB_RED |
| 101 | #define RGB_GREEN EXT_RGB_GREEN |
| 102 | #define RGB_BLUE EXT_RGB_BLUE |
| 103 | #define RGB_PIXELSIZE EXT_RGB_PIXELSIZE |
| 104 | #define ycc_rgb_convert_internal ycc_extrgb_convert_internal |
| 105 | #define gray_rgb_convert_internal gray_extrgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 106 | #define rgb_rgb_convert_internal rgb_extrgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 107 | #include "jdcolext.c" |
| 108 | #undef RGB_RED |
| 109 | #undef RGB_GREEN |
| 110 | #undef RGB_BLUE |
| 111 | #undef RGB_PIXELSIZE |
| 112 | #undef ycc_rgb_convert_internal |
| 113 | #undef gray_rgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 114 | #undef rgb_rgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 115 | |
| 116 | #define RGB_RED EXT_RGBX_RED |
| 117 | #define RGB_GREEN EXT_RGBX_GREEN |
| 118 | #define RGB_BLUE EXT_RGBX_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 119 | #define RGB_ALPHA 3 |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 120 | #define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE |
| 121 | #define ycc_rgb_convert_internal ycc_extrgbx_convert_internal |
| 122 | #define gray_rgb_convert_internal gray_extrgbx_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 123 | #define rgb_rgb_convert_internal rgb_extrgbx_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 124 | #include "jdcolext.c" |
| 125 | #undef RGB_RED |
| 126 | #undef RGB_GREEN |
| 127 | #undef RGB_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 128 | #undef RGB_ALPHA |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 129 | #undef RGB_PIXELSIZE |
| 130 | #undef ycc_rgb_convert_internal |
| 131 | #undef gray_rgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 132 | #undef rgb_rgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 133 | |
| 134 | #define RGB_RED EXT_BGR_RED |
| 135 | #define RGB_GREEN EXT_BGR_GREEN |
| 136 | #define RGB_BLUE EXT_BGR_BLUE |
| 137 | #define RGB_PIXELSIZE EXT_BGR_PIXELSIZE |
| 138 | #define ycc_rgb_convert_internal ycc_extbgr_convert_internal |
| 139 | #define gray_rgb_convert_internal gray_extbgr_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 140 | #define rgb_rgb_convert_internal rgb_extbgr_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 141 | #include "jdcolext.c" |
| 142 | #undef RGB_RED |
| 143 | #undef RGB_GREEN |
| 144 | #undef RGB_BLUE |
| 145 | #undef RGB_PIXELSIZE |
| 146 | #undef ycc_rgb_convert_internal |
| 147 | #undef gray_rgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 148 | #undef rgb_rgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 149 | |
| 150 | #define RGB_RED EXT_BGRX_RED |
| 151 | #define RGB_GREEN EXT_BGRX_GREEN |
| 152 | #define RGB_BLUE EXT_BGRX_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 153 | #define RGB_ALPHA 3 |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 154 | #define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE |
| 155 | #define ycc_rgb_convert_internal ycc_extbgrx_convert_internal |
| 156 | #define gray_rgb_convert_internal gray_extbgrx_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 157 | #define rgb_rgb_convert_internal rgb_extbgrx_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 158 | #include "jdcolext.c" |
| 159 | #undef RGB_RED |
| 160 | #undef RGB_GREEN |
| 161 | #undef RGB_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 162 | #undef RGB_ALPHA |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 163 | #undef RGB_PIXELSIZE |
| 164 | #undef ycc_rgb_convert_internal |
| 165 | #undef gray_rgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 166 | #undef rgb_rgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 167 | |
| 168 | #define RGB_RED EXT_XBGR_RED |
| 169 | #define RGB_GREEN EXT_XBGR_GREEN |
| 170 | #define RGB_BLUE EXT_XBGR_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 171 | #define RGB_ALPHA 0 |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 172 | #define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE |
| 173 | #define ycc_rgb_convert_internal ycc_extxbgr_convert_internal |
| 174 | #define gray_rgb_convert_internal gray_extxbgr_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 175 | #define rgb_rgb_convert_internal rgb_extxbgr_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 176 | #include "jdcolext.c" |
| 177 | #undef RGB_RED |
| 178 | #undef RGB_GREEN |
| 179 | #undef RGB_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 180 | #undef RGB_ALPHA |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 181 | #undef RGB_PIXELSIZE |
| 182 | #undef ycc_rgb_convert_internal |
| 183 | #undef gray_rgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 184 | #undef rgb_rgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 185 | |
| 186 | #define RGB_RED EXT_XRGB_RED |
| 187 | #define RGB_GREEN EXT_XRGB_GREEN |
| 188 | #define RGB_BLUE EXT_XRGB_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 189 | #define RGB_ALPHA 0 |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 190 | #define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE |
| 191 | #define ycc_rgb_convert_internal ycc_extxrgb_convert_internal |
| 192 | #define gray_rgb_convert_internal gray_extxrgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 193 | #define rgb_rgb_convert_internal rgb_extxrgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 194 | #include "jdcolext.c" |
| 195 | #undef RGB_RED |
| 196 | #undef RGB_GREEN |
| 197 | #undef RGB_BLUE |
DRC | d89e01f | 2011-09-09 18:15:53 +0000 | [diff] [blame] | 198 | #undef RGB_ALPHA |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 199 | #undef RGB_PIXELSIZE |
| 200 | #undef ycc_rgb_convert_internal |
| 201 | #undef gray_rgb_convert_internal |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 202 | #undef rgb_rgb_convert_internal |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 203 | |
| 204 | |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 205 | /* |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 206 | * Initialize tables for YCC->RGB colorspace conversion. |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 207 | */ |
| 208 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 209 | LOCAL(void) |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 210 | build_ycc_rgb_table (j_decompress_ptr cinfo) |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 211 | { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 212 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 213 | int i; |
| 214 | INT32 x; |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 215 | SHIFT_TEMPS |
| 216 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 217 | cconvert->Cr_r_tab = (int *) |
| 218 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
DRC | 5de454b | 2014-05-18 19:04:03 +0000 | [diff] [blame] | 219 | (MAXJSAMPLE+1) * sizeof(int)); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 220 | cconvert->Cb_b_tab = (int *) |
| 221 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
DRC | 5de454b | 2014-05-18 19:04:03 +0000 | [diff] [blame] | 222 | (MAXJSAMPLE+1) * sizeof(int)); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 223 | cconvert->Cr_g_tab = (INT32 *) |
| 224 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
DRC | 5de454b | 2014-05-18 19:04:03 +0000 | [diff] [blame] | 225 | (MAXJSAMPLE+1) * sizeof(INT32)); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 226 | cconvert->Cb_g_tab = (INT32 *) |
| 227 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
DRC | 5de454b | 2014-05-18 19:04:03 +0000 | [diff] [blame] | 228 | (MAXJSAMPLE+1) * sizeof(INT32)); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 229 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 230 | for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) { |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 231 | /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 232 | /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */ |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 233 | /* Cr=>R value is nearest int to 1.40200 * x */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 234 | cconvert->Cr_r_tab[i] = (int) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 235 | RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 236 | /* Cb=>B value is nearest int to 1.77200 * x */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 237 | cconvert->Cb_b_tab[i] = (int) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 238 | RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 239 | /* Cr=>G value is scaled-up -0.71414 * x */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 240 | cconvert->Cr_g_tab[i] = (- FIX(0.71414)) * x; |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 241 | /* Cb=>G value is scaled-up -0.34414 * x */ |
| 242 | /* We also add in ONE_HALF so that need not do it in inner loop */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 243 | cconvert->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF; |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 244 | } |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | |
| 248 | /* |
| 249 | * Convert some rows of samples to the output colorspace. |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 250 | */ |
| 251 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 252 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 253 | ycc_rgb_convert (j_decompress_ptr cinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 254 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 255 | JSAMPARRAY output_buf, int num_rows) |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 256 | { |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 257 | switch (cinfo->out_color_space) { |
| 258 | case JCS_EXT_RGB: |
| 259 | ycc_extrgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 260 | num_rows); |
| 261 | break; |
| 262 | case JCS_EXT_RGBX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 263 | case JCS_EXT_RGBA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 264 | ycc_extrgbx_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 265 | num_rows); |
| 266 | break; |
| 267 | case JCS_EXT_BGR: |
| 268 | ycc_extbgr_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 269 | num_rows); |
| 270 | break; |
| 271 | case JCS_EXT_BGRX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 272 | case JCS_EXT_BGRA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 273 | ycc_extbgrx_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 274 | num_rows); |
| 275 | break; |
| 276 | case JCS_EXT_XBGR: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 277 | case JCS_EXT_ABGR: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 278 | ycc_extxbgr_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 279 | num_rows); |
| 280 | break; |
| 281 | case JCS_EXT_XRGB: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 282 | case JCS_EXT_ARGB: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 283 | ycc_extxrgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 284 | num_rows); |
| 285 | break; |
| 286 | default: |
| 287 | ycc_rgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 288 | num_rows); |
| 289 | break; |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 290 | } |
| 291 | } |
| 292 | |
| 293 | |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 294 | /**************** Cases other than YCbCr -> RGB **************/ |
| 295 | |
| 296 | |
| 297 | /* |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 298 | * Initialize for RGB->grayscale colorspace conversion. |
| 299 | */ |
| 300 | |
| 301 | LOCAL(void) |
| 302 | build_rgb_y_table (j_decompress_ptr cinfo) |
| 303 | { |
| 304 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
| 305 | INT32 * rgb_y_tab; |
| 306 | INT32 i; |
| 307 | |
| 308 | /* Allocate and fill in the conversion tables. */ |
| 309 | cconvert->rgb_y_tab = rgb_y_tab = (INT32 *) |
| 310 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
DRC | 5de454b | 2014-05-18 19:04:03 +0000 | [diff] [blame] | 311 | (TABLE_SIZE * sizeof(INT32))); |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 312 | |
| 313 | for (i = 0; i <= MAXJSAMPLE; i++) { |
| 314 | rgb_y_tab[i+R_Y_OFF] = FIX(0.29900) * i; |
| 315 | rgb_y_tab[i+G_Y_OFF] = FIX(0.58700) * i; |
| 316 | rgb_y_tab[i+B_Y_OFF] = FIX(0.11400) * i + ONE_HALF; |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | |
| 321 | /* |
| 322 | * Convert RGB to grayscale. |
| 323 | */ |
| 324 | |
| 325 | METHODDEF(void) |
| 326 | rgb_gray_convert (j_decompress_ptr cinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 327 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 328 | JSAMPARRAY output_buf, int num_rows) |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 329 | { |
| 330 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
| 331 | register int r, g, b; |
| 332 | register INT32 * ctab = cconvert->rgb_y_tab; |
| 333 | register JSAMPROW outptr; |
| 334 | register JSAMPROW inptr0, inptr1, inptr2; |
| 335 | register JDIMENSION col; |
| 336 | JDIMENSION num_cols = cinfo->output_width; |
| 337 | |
| 338 | while (--num_rows >= 0) { |
| 339 | inptr0 = input_buf[0][input_row]; |
| 340 | inptr1 = input_buf[1][input_row]; |
| 341 | inptr2 = input_buf[2][input_row]; |
| 342 | input_row++; |
| 343 | outptr = *output_buf++; |
| 344 | for (col = 0; col < num_cols; col++) { |
| 345 | r = GETJSAMPLE(inptr0[col]); |
| 346 | g = GETJSAMPLE(inptr1[col]); |
| 347 | b = GETJSAMPLE(inptr2[col]); |
| 348 | /* Y */ |
| 349 | outptr[col] = (JSAMPLE) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 350 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) |
| 351 | >> SCALEBITS); |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 352 | } |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | |
| 357 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 358 | * Color conversion for no colorspace change: just copy the data, |
| 359 | * converting from separate-planes to interleaved representation. |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 360 | */ |
| 361 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 362 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 363 | null_convert (j_decompress_ptr cinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 364 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 365 | JSAMPARRAY output_buf, int num_rows) |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 366 | { |
DRC | 0e94025 | 2015-01-20 10:33:32 +0000 | [diff] [blame] | 367 | register JSAMPROW inptr, inptr0, inptr1, inptr2, inptr3, outptr; |
| 368 | register JDIMENSION col; |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 369 | register int num_components = cinfo->num_components; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 370 | JDIMENSION num_cols = cinfo->output_width; |
| 371 | int ci; |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 372 | |
DRC | 0e94025 | 2015-01-20 10:33:32 +0000 | [diff] [blame] | 373 | if (num_components == 3) { |
| 374 | while (--num_rows >= 0) { |
| 375 | inptr0 = input_buf[0][input_row]; |
| 376 | inptr1 = input_buf[1][input_row]; |
| 377 | inptr2 = input_buf[2][input_row]; |
| 378 | input_row++; |
| 379 | outptr = *output_buf++; |
| 380 | for (col = 0; col < num_cols; col++) { |
| 381 | *outptr++ = inptr0[col]; |
| 382 | *outptr++ = inptr1[col]; |
| 383 | *outptr++ = inptr2[col]; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 384 | } |
| 385 | } |
DRC | 0e94025 | 2015-01-20 10:33:32 +0000 | [diff] [blame] | 386 | } else if (num_components == 4) { |
| 387 | while (--num_rows >= 0) { |
| 388 | inptr0 = input_buf[0][input_row]; |
| 389 | inptr1 = input_buf[1][input_row]; |
| 390 | inptr2 = input_buf[2][input_row]; |
| 391 | inptr3 = input_buf[3][input_row]; |
| 392 | input_row++; |
| 393 | outptr = *output_buf++; |
| 394 | for (col = 0; col < num_cols; col++) { |
| 395 | *outptr++ = inptr0[col]; |
| 396 | *outptr++ = inptr1[col]; |
| 397 | *outptr++ = inptr2[col]; |
| 398 | *outptr++ = inptr3[col]; |
| 399 | } |
| 400 | } |
| 401 | } else { |
| 402 | while (--num_rows >= 0) { |
| 403 | for (ci = 0; ci < num_components; ci++) { |
| 404 | inptr = input_buf[ci][input_row]; |
| 405 | outptr = *output_buf; |
| 406 | for (col = 0; col < num_cols; col++) { |
| 407 | outptr[ci] = inptr[col]; |
| 408 | outptr += num_components; |
| 409 | } |
| 410 | } |
| 411 | output_buf++; |
| 412 | input_row++; |
| 413 | } |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 414 | } |
| 415 | } |
| 416 | |
| 417 | |
| 418 | /* |
| 419 | * Color conversion for grayscale: just copy the data. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 420 | * This also works for YCbCr -> grayscale conversion, in which |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 421 | * we just copy the Y (luminance) component and ignore chrominance. |
| 422 | */ |
| 423 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 424 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 425 | grayscale_convert (j_decompress_ptr cinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 426 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 427 | JSAMPARRAY output_buf, int num_rows) |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 428 | { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 429 | jcopy_sample_rows(input_buf[0], (int) input_row, output_buf, 0, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 430 | num_rows, cinfo->output_width); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | |
| 434 | /* |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 435 | * Convert grayscale to RGB |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 436 | */ |
| 437 | |
| 438 | METHODDEF(void) |
| 439 | gray_rgb_convert (j_decompress_ptr cinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 440 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 441 | JSAMPARRAY output_buf, int num_rows) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 442 | { |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 443 | switch (cinfo->out_color_space) { |
| 444 | case JCS_EXT_RGB: |
| 445 | gray_extrgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 446 | num_rows); |
| 447 | break; |
| 448 | case JCS_EXT_RGBX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 449 | case JCS_EXT_RGBA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 450 | gray_extrgbx_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 451 | num_rows); |
| 452 | break; |
| 453 | case JCS_EXT_BGR: |
| 454 | gray_extbgr_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 455 | num_rows); |
| 456 | break; |
| 457 | case JCS_EXT_BGRX: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 458 | case JCS_EXT_BGRA: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 459 | gray_extbgrx_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 460 | num_rows); |
| 461 | break; |
| 462 | case JCS_EXT_XBGR: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 463 | case JCS_EXT_ABGR: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 464 | gray_extxbgr_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 465 | num_rows); |
| 466 | break; |
| 467 | case JCS_EXT_XRGB: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 468 | case JCS_EXT_ARGB: |
DRC | b4570bb | 2011-09-07 06:31:00 +0000 | [diff] [blame] | 469 | gray_extxrgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 470 | num_rows); |
| 471 | break; |
| 472 | default: |
| 473 | gray_rgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 474 | num_rows); |
| 475 | break; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 476 | } |
| 477 | } |
| 478 | |
| 479 | |
| 480 | /* |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 481 | * Convert plain RGB to extended RGB |
| 482 | */ |
| 483 | |
| 484 | METHODDEF(void) |
| 485 | rgb_rgb_convert (j_decompress_ptr cinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 486 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 487 | JSAMPARRAY output_buf, int num_rows) |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 488 | { |
| 489 | switch (cinfo->out_color_space) { |
| 490 | case JCS_EXT_RGB: |
| 491 | rgb_extrgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 492 | num_rows); |
| 493 | break; |
| 494 | case JCS_EXT_RGBX: |
| 495 | case JCS_EXT_RGBA: |
| 496 | rgb_extrgbx_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 497 | num_rows); |
| 498 | break; |
| 499 | case JCS_EXT_BGR: |
| 500 | rgb_extbgr_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 501 | num_rows); |
| 502 | break; |
| 503 | case JCS_EXT_BGRX: |
| 504 | case JCS_EXT_BGRA: |
| 505 | rgb_extbgrx_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 506 | num_rows); |
| 507 | break; |
| 508 | case JCS_EXT_XBGR: |
| 509 | case JCS_EXT_ABGR: |
| 510 | rgb_extxbgr_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 511 | num_rows); |
| 512 | break; |
| 513 | case JCS_EXT_XRGB: |
| 514 | case JCS_EXT_ARGB: |
| 515 | rgb_extxrgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 516 | num_rows); |
| 517 | break; |
| 518 | default: |
| 519 | rgb_rgb_convert_internal(cinfo, input_buf, input_row, output_buf, |
| 520 | num_rows); |
| 521 | break; |
| 522 | } |
| 523 | } |
| 524 | |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 525 | |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 526 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 527 | * Adobe-style YCCK->CMYK conversion. |
| 528 | * We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same |
| 529 | * conversion as above, while passing K (black) unchanged. |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 530 | * We assume build_ycc_rgb_table has been called. |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 531 | */ |
| 532 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 533 | METHODDEF(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 534 | ycck_cmyk_convert (j_decompress_ptr cinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 535 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 536 | JSAMPARRAY output_buf, int num_rows) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 537 | { |
| 538 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
| 539 | register int y, cb, cr; |
| 540 | register JSAMPROW outptr; |
| 541 | register JSAMPROW inptr0, inptr1, inptr2, inptr3; |
| 542 | register JDIMENSION col; |
| 543 | JDIMENSION num_cols = cinfo->output_width; |
| 544 | /* copy these pointers into registers if possible */ |
| 545 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 546 | register int * Crrtab = cconvert->Cr_r_tab; |
| 547 | register int * Cbbtab = cconvert->Cb_b_tab; |
| 548 | register INT32 * Crgtab = cconvert->Cr_g_tab; |
| 549 | register INT32 * Cbgtab = cconvert->Cb_g_tab; |
| 550 | SHIFT_TEMPS |
| 551 | |
| 552 | while (--num_rows >= 0) { |
| 553 | inptr0 = input_buf[0][input_row]; |
| 554 | inptr1 = input_buf[1][input_row]; |
| 555 | inptr2 = input_buf[2][input_row]; |
| 556 | inptr3 = input_buf[3][input_row]; |
| 557 | input_row++; |
| 558 | outptr = *output_buf++; |
| 559 | for (col = 0; col < num_cols; col++) { |
| 560 | y = GETJSAMPLE(inptr0[col]); |
| 561 | cb = GETJSAMPLE(inptr1[col]); |
| 562 | cr = GETJSAMPLE(inptr2[col]); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 563 | /* Range-limiting is essential due to noise introduced by DCT losses. */ |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 564 | outptr[0] = range_limit[MAXJSAMPLE - (y + Crrtab[cr])]; /* red */ |
| 565 | outptr[1] = range_limit[MAXJSAMPLE - (y + /* green */ |
| 566 | ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 567 | SCALEBITS)))]; |
| 568 | outptr[2] = range_limit[MAXJSAMPLE - (y + Cbbtab[cb])]; /* blue */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 569 | /* K passes through unchanged */ |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 570 | outptr[3] = inptr3[col]; /* don't need GETJSAMPLE here */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 571 | outptr += 4; |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 577 | /* |
| 578 | * RGB565 conversion |
| 579 | */ |
| 580 | |
| 581 | #define PACK_SHORT_565_LE(r, g, b) ((((r) << 8) & 0xF800) | \ |
| 582 | (((g) << 3) & 0x7E0) | ((b) >> 3)) |
| 583 | #define PACK_SHORT_565_BE(r, g, b) (((r) & 0xF8) | ((g) >> 5) | \ |
| 584 | (((g) << 11) & 0xE000) | \ |
| 585 | (((b) << 5) & 0x1F00)) |
| 586 | |
| 587 | #define PACK_TWO_PIXELS_LE(l, r) ((r << 16) | l) |
| 588 | #define PACK_TWO_PIXELS_BE(l, r) ((l << 16) | r) |
| 589 | |
| 590 | #define PACK_NEED_ALIGNMENT(ptr) (((size_t)(ptr)) & 3) |
| 591 | |
DRC | bbd9b71 | 2014-09-04 17:35:22 +0000 | [diff] [blame] | 592 | #define WRITE_TWO_ALIGNED_PIXELS(addr, pixels) ((*(int *)(addr)) = pixels) |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 593 | |
| 594 | #define DITHER_565_R(r, dither) ((r) + ((dither) & 0xFF)) |
| 595 | #define DITHER_565_G(g, dither) ((g) + (((dither) & 0xFF) >> 1)) |
| 596 | #define DITHER_565_B(b, dither) ((b) + ((dither) & 0xFF)) |
| 597 | |
| 598 | |
| 599 | /* Declarations for ordered dithering |
| 600 | * |
| 601 | * We use a 4x4 ordered dither array packed into 32 bits. This array is |
| 602 | * sufficent for dithering RGB888 to RGB565. |
| 603 | */ |
| 604 | |
| 605 | #define DITHER_MASK 0x3 |
| 606 | #define DITHER_ROTATE(x) (((x) << 24) | (((x) >> 8) & 0x00FFFFFF)) |
| 607 | static const INT32 dither_matrix[4] = { |
| 608 | 0x0008020A, |
| 609 | 0x0C040E06, |
| 610 | 0x030B0109, |
| 611 | 0x0F070D05 |
| 612 | }; |
| 613 | |
| 614 | |
| 615 | static INLINE boolean is_big_endian(void) |
| 616 | { |
| 617 | int test_value = 1; |
| 618 | if(*(char *)&test_value != 1) |
| 619 | return TRUE; |
| 620 | return FALSE; |
| 621 | } |
| 622 | |
| 623 | |
| 624 | /* Include inline routines for RGB565 conversion */ |
| 625 | |
| 626 | #define PACK_SHORT_565 PACK_SHORT_565_LE |
| 627 | #define PACK_TWO_PIXELS PACK_TWO_PIXELS_LE |
| 628 | #define ycc_rgb565_convert_internal ycc_rgb565_convert_le |
| 629 | #define ycc_rgb565D_convert_internal ycc_rgb565D_convert_le |
| 630 | #define rgb_rgb565_convert_internal rgb_rgb565_convert_le |
| 631 | #define rgb_rgb565D_convert_internal rgb_rgb565D_convert_le |
| 632 | #define gray_rgb565_convert_internal gray_rgb565_convert_le |
| 633 | #define gray_rgb565D_convert_internal gray_rgb565D_convert_le |
DRC | 78df2e6 | 2014-05-12 09:23:57 +0000 | [diff] [blame] | 634 | #include "jdcol565.c" |
DRC | 72a3cc0 | 2014-08-30 20:37:50 +0000 | [diff] [blame] | 635 | #undef PACK_SHORT_565 |
| 636 | #undef PACK_TWO_PIXELS |
| 637 | #undef ycc_rgb565_convert_internal |
| 638 | #undef ycc_rgb565D_convert_internal |
| 639 | #undef rgb_rgb565_convert_internal |
| 640 | #undef rgb_rgb565D_convert_internal |
| 641 | #undef gray_rgb565_convert_internal |
| 642 | #undef gray_rgb565D_convert_internal |
| 643 | |
| 644 | #define PACK_SHORT_565 PACK_SHORT_565_BE |
| 645 | #define PACK_TWO_PIXELS PACK_TWO_PIXELS_BE |
| 646 | #define ycc_rgb565_convert_internal ycc_rgb565_convert_be |
| 647 | #define ycc_rgb565D_convert_internal ycc_rgb565D_convert_be |
| 648 | #define rgb_rgb565_convert_internal rgb_rgb565_convert_be |
| 649 | #define rgb_rgb565D_convert_internal rgb_rgb565D_convert_be |
| 650 | #define gray_rgb565_convert_internal gray_rgb565_convert_be |
| 651 | #define gray_rgb565D_convert_internal gray_rgb565D_convert_be |
| 652 | #include "jdcol565.c" |
| 653 | #undef PACK_SHORT_565 |
| 654 | #undef PACK_TWO_PIXELS |
| 655 | #undef ycc_rgb565_convert_internal |
| 656 | #undef ycc_rgb565D_convert_internal |
| 657 | #undef rgb_rgb565_convert_internal |
| 658 | #undef rgb_rgb565D_convert_internal |
| 659 | #undef gray_rgb565_convert_internal |
| 660 | #undef gray_rgb565D_convert_internal |
| 661 | |
| 662 | |
| 663 | METHODDEF(void) |
| 664 | ycc_rgb565_convert (j_decompress_ptr cinfo, |
| 665 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 666 | JSAMPARRAY output_buf, int num_rows) |
| 667 | { |
| 668 | if (is_big_endian()) |
| 669 | ycc_rgb565_convert_be(cinfo, input_buf, input_row, output_buf, num_rows); |
| 670 | else |
| 671 | ycc_rgb565_convert_le(cinfo, input_buf, input_row, output_buf, num_rows); |
| 672 | } |
| 673 | |
| 674 | |
| 675 | METHODDEF(void) |
| 676 | ycc_rgb565D_convert (j_decompress_ptr cinfo, |
| 677 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 678 | JSAMPARRAY output_buf, int num_rows) |
| 679 | { |
| 680 | if (is_big_endian()) |
| 681 | ycc_rgb565D_convert_be(cinfo, input_buf, input_row, output_buf, num_rows); |
| 682 | else |
| 683 | ycc_rgb565D_convert_le(cinfo, input_buf, input_row, output_buf, num_rows); |
| 684 | } |
| 685 | |
| 686 | |
| 687 | METHODDEF(void) |
| 688 | rgb_rgb565_convert (j_decompress_ptr cinfo, |
| 689 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 690 | JSAMPARRAY output_buf, int num_rows) |
| 691 | { |
| 692 | if (is_big_endian()) |
| 693 | rgb_rgb565_convert_be(cinfo, input_buf, input_row, output_buf, num_rows); |
| 694 | else |
| 695 | rgb_rgb565_convert_le(cinfo, input_buf, input_row, output_buf, num_rows); |
| 696 | } |
| 697 | |
| 698 | |
| 699 | METHODDEF(void) |
| 700 | rgb_rgb565D_convert (j_decompress_ptr cinfo, |
| 701 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 702 | JSAMPARRAY output_buf, int num_rows) |
| 703 | { |
| 704 | if (is_big_endian()) |
| 705 | rgb_rgb565D_convert_be(cinfo, input_buf, input_row, output_buf, num_rows); |
| 706 | else |
| 707 | rgb_rgb565D_convert_le(cinfo, input_buf, input_row, output_buf, num_rows); |
| 708 | } |
| 709 | |
| 710 | |
| 711 | METHODDEF(void) |
| 712 | gray_rgb565_convert (j_decompress_ptr cinfo, |
| 713 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 714 | JSAMPARRAY output_buf, int num_rows) |
| 715 | { |
| 716 | if (is_big_endian()) |
| 717 | gray_rgb565_convert_be(cinfo, input_buf, input_row, output_buf, num_rows); |
| 718 | else |
| 719 | gray_rgb565_convert_le(cinfo, input_buf, input_row, output_buf, num_rows); |
| 720 | } |
| 721 | |
| 722 | |
| 723 | METHODDEF(void) |
| 724 | gray_rgb565D_convert (j_decompress_ptr cinfo, |
| 725 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 726 | JSAMPARRAY output_buf, int num_rows) |
| 727 | { |
| 728 | if (is_big_endian()) |
| 729 | gray_rgb565D_convert_be(cinfo, input_buf, input_row, output_buf, num_rows); |
| 730 | else |
| 731 | gray_rgb565D_convert_le(cinfo, input_buf, input_row, output_buf, num_rows); |
| 732 | } |
DRC | 78df2e6 | 2014-05-12 09:23:57 +0000 | [diff] [blame] | 733 | |
| 734 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 735 | /* |
| 736 | * Empty method for start_pass. |
| 737 | */ |
| 738 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 739 | METHODDEF(void) |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 740 | start_pass_dcolor (j_decompress_ptr cinfo) |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 741 | { |
| 742 | /* no work needed */ |
| 743 | } |
| 744 | |
| 745 | |
| 746 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 747 | * Module initialization routine for output colorspace conversion. |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 748 | */ |
| 749 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 750 | GLOBAL(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 751 | jinit_color_deconverter (j_decompress_ptr cinfo) |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 752 | { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 753 | my_cconvert_ptr cconvert; |
Thomas G. Lane | cc7150e | 1993-02-18 00:00:00 +0000 | [diff] [blame] | 754 | int ci; |
| 755 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 756 | cconvert = (my_cconvert_ptr) |
| 757 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
DRC | 5de454b | 2014-05-18 19:04:03 +0000 | [diff] [blame] | 758 | sizeof(my_color_deconverter)); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 759 | cinfo->cconvert = (struct jpeg_color_deconverter *) cconvert; |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 760 | cconvert->pub.start_pass = start_pass_dcolor; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 761 | |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 762 | /* Make sure num_components agrees with jpeg_color_space */ |
| 763 | switch (cinfo->jpeg_color_space) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 764 | case JCS_GRAYSCALE: |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 765 | if (cinfo->num_components != 1) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 766 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 767 | break; |
| 768 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 769 | case JCS_RGB: |
| 770 | case JCS_YCbCr: |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 771 | if (cinfo->num_components != 3) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 772 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 773 | break; |
| 774 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 775 | case JCS_CMYK: |
| 776 | case JCS_YCCK: |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 777 | if (cinfo->num_components != 4) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 778 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 779 | break; |
| 780 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 781 | default: /* JCS_UNKNOWN can be anything */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 782 | if (cinfo->num_components < 1) |
| 783 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 784 | break; |
| 785 | } |
| 786 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 787 | /* Set out_color_components and conversion method based on requested space. |
| 788 | * Also clear the component_needed flags for any unused components, |
| 789 | * so that earlier pipeline stages can avoid useless computation. |
| 790 | */ |
Thomas G. Lane | cc7150e | 1993-02-18 00:00:00 +0000 | [diff] [blame] | 791 | |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 792 | switch (cinfo->out_color_space) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 793 | case JCS_GRAYSCALE: |
| 794 | cinfo->out_color_components = 1; |
| 795 | if (cinfo->jpeg_color_space == JCS_GRAYSCALE || |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 796 | cinfo->jpeg_color_space == JCS_YCbCr) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 797 | cconvert->pub.color_convert = grayscale_convert; |
Thomas G. Lane | cc7150e | 1993-02-18 00:00:00 +0000 | [diff] [blame] | 798 | /* For color->grayscale conversion, only the Y (0) component is needed */ |
| 799 | for (ci = 1; ci < cinfo->num_components; ci++) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 800 | cinfo->comp_info[ci].component_needed = FALSE; |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 801 | } else if (cinfo->jpeg_color_space == JCS_RGB) { |
| 802 | cconvert->pub.color_convert = rgb_gray_convert; |
| 803 | build_rgb_y_table(cinfo); |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 804 | } else |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 805 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 806 | break; |
| 807 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 808 | case JCS_RGB: |
DRC | f25c071 | 2009-04-03 12:00:51 +0000 | [diff] [blame] | 809 | case JCS_EXT_RGB: |
| 810 | case JCS_EXT_RGBX: |
| 811 | case JCS_EXT_BGR: |
| 812 | case JCS_EXT_BGRX: |
| 813 | case JCS_EXT_XBGR: |
| 814 | case JCS_EXT_XRGB: |
DRC | 67ce3b2 | 2011-12-19 02:21:03 +0000 | [diff] [blame] | 815 | case JCS_EXT_RGBA: |
| 816 | case JCS_EXT_BGRA: |
| 817 | case JCS_EXT_ABGR: |
| 818 | case JCS_EXT_ARGB: |
DRC | f25c071 | 2009-04-03 12:00:51 +0000 | [diff] [blame] | 819 | cinfo->out_color_components = rgb_pixelsize[cinfo->out_color_space]; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 820 | if (cinfo->jpeg_color_space == JCS_YCbCr) { |
Pierre Ossman | 59a3938 | 2009-03-09 13:15:56 +0000 | [diff] [blame] | 821 | if (jsimd_can_ycc_rgb()) |
| 822 | cconvert->pub.color_convert = jsimd_ycc_rgb_convert; |
| 823 | else { |
| 824 | cconvert->pub.color_convert = ycc_rgb_convert; |
| 825 | build_ycc_rgb_table(cinfo); |
| 826 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 827 | } else if (cinfo->jpeg_color_space == JCS_GRAYSCALE) { |
| 828 | cconvert->pub.color_convert = gray_rgb_convert; |
DRC | a9b646c | 2012-03-11 22:06:54 +0000 | [diff] [blame] | 829 | } else if (cinfo->jpeg_color_space == JCS_RGB) { |
| 830 | if (rgb_red[cinfo->out_color_space] == 0 && |
| 831 | rgb_green[cinfo->out_color_space] == 1 && |
| 832 | rgb_blue[cinfo->out_color_space] == 2 && |
| 833 | rgb_pixelsize[cinfo->out_color_space] == 3) |
| 834 | cconvert->pub.color_convert = null_convert; |
| 835 | else |
| 836 | cconvert->pub.color_convert = rgb_rgb_convert; |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 837 | } else |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 838 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
| 839 | break; |
| 840 | |
DRC | 78df2e6 | 2014-05-12 09:23:57 +0000 | [diff] [blame] | 841 | case JCS_RGB565: |
| 842 | cinfo->out_color_components = 3; |
| 843 | if (cinfo->dither_mode == JDITHER_NONE) { |
| 844 | if (cinfo->jpeg_color_space == JCS_YCbCr) { |
DRC | d729f4d | 2014-08-23 15:47:51 +0000 | [diff] [blame] | 845 | if (jsimd_can_ycc_rgb565()) |
| 846 | cconvert->pub.color_convert = jsimd_ycc_rgb565_convert; |
| 847 | else { |
| 848 | cconvert->pub.color_convert = ycc_rgb565_convert; |
| 849 | build_ycc_rgb_table(cinfo); |
| 850 | } |
DRC | 78df2e6 | 2014-05-12 09:23:57 +0000 | [diff] [blame] | 851 | } else if (cinfo->jpeg_color_space == JCS_GRAYSCALE) { |
| 852 | cconvert->pub.color_convert = gray_rgb565_convert; |
| 853 | } else if (cinfo->jpeg_color_space == JCS_RGB) { |
| 854 | cconvert->pub.color_convert = rgb_rgb565_convert; |
| 855 | } else |
| 856 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
| 857 | } else { |
| 858 | /* only ordered dithering is supported */ |
| 859 | if (cinfo->jpeg_color_space == JCS_YCbCr) { |
| 860 | cconvert->pub.color_convert = ycc_rgb565D_convert; |
| 861 | build_ycc_rgb_table(cinfo); |
| 862 | } else if (cinfo->jpeg_color_space == JCS_GRAYSCALE) { |
| 863 | cconvert->pub.color_convert = gray_rgb565D_convert; |
| 864 | } else if (cinfo->jpeg_color_space == JCS_RGB) { |
| 865 | cconvert->pub.color_convert = rgb_rgb565D_convert; |
| 866 | } else |
| 867 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
| 868 | } |
| 869 | break; |
| 870 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 871 | case JCS_CMYK: |
| 872 | cinfo->out_color_components = 4; |
| 873 | if (cinfo->jpeg_color_space == JCS_YCCK) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 874 | cconvert->pub.color_convert = ycck_cmyk_convert; |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 875 | build_ycc_rgb_table(cinfo); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 876 | } else if (cinfo->jpeg_color_space == JCS_CMYK) { |
| 877 | cconvert->pub.color_convert = null_convert; |
| 878 | } else |
| 879 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 880 | break; |
| 881 | |
| 882 | default: |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 883 | /* Permit null conversion to same output space */ |
Thomas G. Lane | 4a6b730 | 1992-03-17 00:00:00 +0000 | [diff] [blame] | 884 | if (cinfo->out_color_space == cinfo->jpeg_color_space) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 885 | cinfo->out_color_components = cinfo->num_components; |
| 886 | cconvert->pub.color_convert = null_convert; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 887 | } else /* unsupported non-null conversion */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 888 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 889 | break; |
| 890 | } |
| 891 | |
| 892 | if (cinfo->quantize_colors) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 893 | cinfo->output_components = 1; /* single colormapped output component */ |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 894 | else |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 895 | cinfo->output_components = cinfo->out_color_components; |
Thomas G. Lane | 2cbeb8a | 1991-10-07 00:00:00 +0000 | [diff] [blame] | 896 | } |