diff options
Diffstat (limited to '')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c | 980 |
1 files changed, 490 insertions, 490 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c index 12d35f4..3e2d0e9 100644 --- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c | |||
@@ -1,490 +1,490 @@ | |||
1 | /* | 1 | /* |
2 | * jccolor.c | 2 | * jccolor.c |
3 | * | 3 | * |
4 | * Copyright (C) 1991-1996, Thomas G. Lane. | 4 | * Copyright (C) 1991-1996, Thomas G. Lane. |
5 | * Modified 2011 by Guido Vollbeding. | 5 | * Modified 2011 by Guido Vollbeding. |
6 | * This file is part of the Independent JPEG Group's software. | 6 | * This file is part of the Independent JPEG Group's software. |
7 | * For conditions of distribution and use, see the accompanying README file. | 7 | * For conditions of distribution and use, see the accompanying README file. |
8 | * | 8 | * |
9 | * This file contains input colorspace conversion routines. | 9 | * This file contains input colorspace conversion routines. |
10 | */ | 10 | */ |
11 | 11 | ||
12 | #define JPEG_INTERNALS | 12 | #define JPEG_INTERNALS |
13 | #include "jinclude.h" | 13 | #include "jinclude.h" |
14 | #include "jpeglib.h" | 14 | #include "jpeglib.h" |
15 | 15 | ||
16 | 16 | ||
17 | /* Private subobject */ | 17 | /* Private subobject */ |
18 | 18 | ||
19 | typedef struct { | 19 | typedef struct { |
20 | struct jpeg_color_converter pub; /* public fields */ | 20 | struct jpeg_color_converter pub; /* public fields */ |
21 | 21 | ||
22 | /* Private state for RGB->YCC conversion */ | 22 | /* Private state for RGB->YCC conversion */ |
23 | INT32 * rgb_ycc_tab; /* => table for RGB to YCbCr conversion */ | 23 | INT32 * rgb_ycc_tab; /* => table for RGB to YCbCr conversion */ |
24 | } my_color_converter; | 24 | } my_color_converter; |
25 | 25 | ||
26 | typedef my_color_converter * my_cconvert_ptr; | 26 | typedef my_color_converter * my_cconvert_ptr; |
27 | 27 | ||
28 | 28 | ||
29 | /**************** RGB -> YCbCr conversion: most common case **************/ | 29 | /**************** RGB -> YCbCr conversion: most common case **************/ |
30 | 30 | ||
31 | /* | 31 | /* |
32 | * YCbCr is defined per CCIR 601-1, except that Cb and Cr are | 32 | * YCbCr is defined per CCIR 601-1, except that Cb and Cr are |
33 | * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5. | 33 | * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5. |
34 | * The conversion equations to be implemented are therefore | 34 | * The conversion equations to be implemented are therefore |
35 | * Y = 0.29900 * R + 0.58700 * G + 0.11400 * B | 35 | * Y = 0.29900 * R + 0.58700 * G + 0.11400 * B |
36 | * Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE | 36 | * Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE |
37 | * Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE | 37 | * Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE |
38 | * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.) | 38 | * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.) |
39 | * Note: older versions of the IJG code used a zero offset of MAXJSAMPLE/2, | 39 | * Note: older versions of the IJG code used a zero offset of MAXJSAMPLE/2, |
40 | * rather than CENTERJSAMPLE, for Cb and Cr. This gave equal positive and | 40 | * rather than CENTERJSAMPLE, for Cb and Cr. This gave equal positive and |
41 | * negative swings for Cb/Cr, but meant that grayscale values (Cb=Cr=0) | 41 | * negative swings for Cb/Cr, but meant that grayscale values (Cb=Cr=0) |
42 | * were not represented exactly. Now we sacrifice exact representation of | 42 | * were not represented exactly. Now we sacrifice exact representation of |
43 | * maximum red and maximum blue in order to get exact grayscales. | 43 | * maximum red and maximum blue in order to get exact grayscales. |
44 | * | 44 | * |
45 | * To avoid floating-point arithmetic, we represent the fractional constants | 45 | * To avoid floating-point arithmetic, we represent the fractional constants |
46 | * as integers scaled up by 2^16 (about 4 digits precision); we have to divide | 46 | * as integers scaled up by 2^16 (about 4 digits precision); we have to divide |
47 | * the products by 2^16, with appropriate rounding, to get the correct answer. | 47 | * the products by 2^16, with appropriate rounding, to get the correct answer. |
48 | * | 48 | * |
49 | * For even more speed, we avoid doing any multiplications in the inner loop | 49 | * For even more speed, we avoid doing any multiplications in the inner loop |
50 | * by precalculating the constants times R,G,B for all possible values. | 50 | * by precalculating the constants times R,G,B for all possible values. |
51 | * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table); | 51 | * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table); |
52 | * for 12-bit samples it is still acceptable. It's not very reasonable for | 52 | * for 12-bit samples it is still acceptable. It's not very reasonable for |
53 | * 16-bit samples, but if you want lossless storage you shouldn't be changing | 53 | * 16-bit samples, but if you want lossless storage you shouldn't be changing |
54 | * colorspace anyway. | 54 | * colorspace anyway. |
55 | * The CENTERJSAMPLE offsets and the rounding fudge-factor of 0.5 are included | 55 | * The CENTERJSAMPLE offsets and the rounding fudge-factor of 0.5 are included |
56 | * in the tables to save adding them separately in the inner loop. | 56 | * in the tables to save adding them separately in the inner loop. |
57 | */ | 57 | */ |
58 | 58 | ||
59 | #define SCALEBITS 16 /* speediest right-shift on some machines */ | 59 | #define SCALEBITS 16 /* speediest right-shift on some machines */ |
60 | #define CBCR_OFFSET ((INT32) CENTERJSAMPLE << SCALEBITS) | 60 | #define CBCR_OFFSET ((INT32) CENTERJSAMPLE << SCALEBITS) |
61 | #define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) | 61 | #define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) |
62 | #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) | 62 | #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) |
63 | 63 | ||
64 | /* We allocate one big table and divide it up into eight parts, instead of | 64 | /* We allocate one big table and divide it up into eight parts, instead of |
65 | * doing eight alloc_small requests. This lets us use a single table base | 65 | * doing eight alloc_small requests. This lets us use a single table base |
66 | * address, which can be held in a register in the inner loops on many | 66 | * address, which can be held in a register in the inner loops on many |
67 | * machines (more than can hold all eight addresses, anyway). | 67 | * machines (more than can hold all eight addresses, anyway). |
68 | */ | 68 | */ |
69 | 69 | ||
70 | #define R_Y_OFF 0 /* offset to R => Y section */ | 70 | #define R_Y_OFF 0 /* offset to R => Y section */ |
71 | #define G_Y_OFF (1*(MAXJSAMPLE+1)) /* offset to G => Y section */ | 71 | #define G_Y_OFF (1*(MAXJSAMPLE+1)) /* offset to G => Y section */ |
72 | #define B_Y_OFF (2*(MAXJSAMPLE+1)) /* etc. */ | 72 | #define B_Y_OFF (2*(MAXJSAMPLE+1)) /* etc. */ |
73 | #define R_CB_OFF (3*(MAXJSAMPLE+1)) | 73 | #define R_CB_OFF (3*(MAXJSAMPLE+1)) |
74 | #define G_CB_OFF (4*(MAXJSAMPLE+1)) | 74 | #define G_CB_OFF (4*(MAXJSAMPLE+1)) |
75 | #define B_CB_OFF (5*(MAXJSAMPLE+1)) | 75 | #define B_CB_OFF (5*(MAXJSAMPLE+1)) |
76 | #define R_CR_OFF B_CB_OFF /* B=>Cb, R=>Cr are the same */ | 76 | #define R_CR_OFF B_CB_OFF /* B=>Cb, R=>Cr are the same */ |
77 | #define G_CR_OFF (6*(MAXJSAMPLE+1)) | 77 | #define G_CR_OFF (6*(MAXJSAMPLE+1)) |
78 | #define B_CR_OFF (7*(MAXJSAMPLE+1)) | 78 | #define B_CR_OFF (7*(MAXJSAMPLE+1)) |
79 | #define TABLE_SIZE (8*(MAXJSAMPLE+1)) | 79 | #define TABLE_SIZE (8*(MAXJSAMPLE+1)) |
80 | 80 | ||
81 | 81 | ||
82 | /* | 82 | /* |
83 | * Initialize for RGB->YCC colorspace conversion. | 83 | * Initialize for RGB->YCC colorspace conversion. |
84 | */ | 84 | */ |
85 | 85 | ||
86 | METHODDEF(void) | 86 | METHODDEF(void) |
87 | rgb_ycc_start (j_compress_ptr cinfo) | 87 | rgb_ycc_start (j_compress_ptr cinfo) |
88 | { | 88 | { |
89 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 89 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
90 | INT32 * rgb_ycc_tab; | 90 | INT32 * rgb_ycc_tab; |
91 | INT32 i; | 91 | INT32 i; |
92 | 92 | ||
93 | /* Allocate and fill in the conversion tables. */ | 93 | /* Allocate and fill in the conversion tables. */ |
94 | cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *) | 94 | cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *) |
95 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 95 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
96 | (TABLE_SIZE * SIZEOF(INT32))); | 96 | (TABLE_SIZE * SIZEOF(INT32))); |
97 | 97 | ||
98 | for (i = 0; i <= MAXJSAMPLE; i++) { | 98 | for (i = 0; i <= MAXJSAMPLE; i++) { |
99 | rgb_ycc_tab[i+R_Y_OFF] = FIX(0.29900) * i; | 99 | rgb_ycc_tab[i+R_Y_OFF] = FIX(0.29900) * i; |
100 | rgb_ycc_tab[i+G_Y_OFF] = FIX(0.58700) * i; | 100 | rgb_ycc_tab[i+G_Y_OFF] = FIX(0.58700) * i; |
101 | rgb_ycc_tab[i+B_Y_OFF] = FIX(0.11400) * i + ONE_HALF; | 101 | rgb_ycc_tab[i+B_Y_OFF] = FIX(0.11400) * i + ONE_HALF; |
102 | rgb_ycc_tab[i+R_CB_OFF] = (-FIX(0.16874)) * i; | 102 | rgb_ycc_tab[i+R_CB_OFF] = (-FIX(0.16874)) * i; |
103 | rgb_ycc_tab[i+G_CB_OFF] = (-FIX(0.33126)) * i; | 103 | rgb_ycc_tab[i+G_CB_OFF] = (-FIX(0.33126)) * i; |
104 | /* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr. | 104 | /* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr. |
105 | * This ensures that the maximum output will round to MAXJSAMPLE | 105 | * This ensures that the maximum output will round to MAXJSAMPLE |
106 | * not MAXJSAMPLE+1, and thus that we don't have to range-limit. | 106 | * not MAXJSAMPLE+1, and thus that we don't have to range-limit. |
107 | */ | 107 | */ |
108 | rgb_ycc_tab[i+B_CB_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1; | 108 | rgb_ycc_tab[i+B_CB_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1; |
109 | /* B=>Cb and R=>Cr tables are the same | 109 | /* B=>Cb and R=>Cr tables are the same |
110 | rgb_ycc_tab[i+R_CR_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1; | 110 | rgb_ycc_tab[i+R_CR_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1; |
111 | */ | 111 | */ |
112 | rgb_ycc_tab[i+G_CR_OFF] = (-FIX(0.41869)) * i; | 112 | rgb_ycc_tab[i+G_CR_OFF] = (-FIX(0.41869)) * i; |
113 | rgb_ycc_tab[i+B_CR_OFF] = (-FIX(0.08131)) * i; | 113 | rgb_ycc_tab[i+B_CR_OFF] = (-FIX(0.08131)) * i; |
114 | } | 114 | } |
115 | } | 115 | } |
116 | 116 | ||
117 | 117 | ||
118 | /* | 118 | /* |
119 | * Convert some rows of samples to the JPEG colorspace. | 119 | * Convert some rows of samples to the JPEG colorspace. |
120 | * | 120 | * |
121 | * Note that we change from the application's interleaved-pixel format | 121 | * Note that we change from the application's interleaved-pixel format |
122 | * to our internal noninterleaved, one-plane-per-component format. | 122 | * to our internal noninterleaved, one-plane-per-component format. |
123 | * The input buffer is therefore three times as wide as the output buffer. | 123 | * The input buffer is therefore three times as wide as the output buffer. |
124 | * | 124 | * |
125 | * A starting row offset is provided only for the output buffer. The caller | 125 | * A starting row offset is provided only for the output buffer. The caller |
126 | * can easily adjust the passed input_buf value to accommodate any row | 126 | * can easily adjust the passed input_buf value to accommodate any row |
127 | * offset required on that side. | 127 | * offset required on that side. |
128 | */ | 128 | */ |
129 | 129 | ||
130 | METHODDEF(void) | 130 | METHODDEF(void) |
131 | rgb_ycc_convert (j_compress_ptr cinfo, | 131 | rgb_ycc_convert (j_compress_ptr cinfo, |
132 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, | 132 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, |
133 | JDIMENSION output_row, int num_rows) | 133 | JDIMENSION output_row, int num_rows) |
134 | { | 134 | { |
135 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 135 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
136 | register int r, g, b; | 136 | register int r, g, b; |
137 | register INT32 * ctab = cconvert->rgb_ycc_tab; | 137 | register INT32 * ctab = cconvert->rgb_ycc_tab; |
138 | register JSAMPROW inptr; | 138 | register JSAMPROW inptr; |
139 | register JSAMPROW outptr0, outptr1, outptr2; | 139 | register JSAMPROW outptr0, outptr1, outptr2; |
140 | register JDIMENSION col; | 140 | register JDIMENSION col; |
141 | JDIMENSION num_cols = cinfo->image_width; | 141 | JDIMENSION num_cols = cinfo->image_width; |
142 | 142 | ||
143 | while (--num_rows >= 0) { | 143 | while (--num_rows >= 0) { |
144 | inptr = *input_buf++; | 144 | inptr = *input_buf++; |
145 | outptr0 = output_buf[0][output_row]; | 145 | outptr0 = output_buf[0][output_row]; |
146 | outptr1 = output_buf[1][output_row]; | 146 | outptr1 = output_buf[1][output_row]; |
147 | outptr2 = output_buf[2][output_row]; | 147 | outptr2 = output_buf[2][output_row]; |
148 | output_row++; | 148 | output_row++; |
149 | for (col = 0; col < num_cols; col++) { | 149 | for (col = 0; col < num_cols; col++) { |
150 | r = GETJSAMPLE(inptr[RGB_RED]); | 150 | r = GETJSAMPLE(inptr[RGB_RED]); |
151 | g = GETJSAMPLE(inptr[RGB_GREEN]); | 151 | g = GETJSAMPLE(inptr[RGB_GREEN]); |
152 | b = GETJSAMPLE(inptr[RGB_BLUE]); | 152 | b = GETJSAMPLE(inptr[RGB_BLUE]); |
153 | inptr += RGB_PIXELSIZE; | 153 | inptr += RGB_PIXELSIZE; |
154 | /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations | 154 | /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations |
155 | * must be too; we do not need an explicit range-limiting operation. | 155 | * must be too; we do not need an explicit range-limiting operation. |
156 | * Hence the value being shifted is never negative, and we don't | 156 | * Hence the value being shifted is never negative, and we don't |
157 | * need the general RIGHT_SHIFT macro. | 157 | * need the general RIGHT_SHIFT macro. |
158 | */ | 158 | */ |
159 | /* Y */ | 159 | /* Y */ |
160 | outptr0[col] = (JSAMPLE) | 160 | outptr0[col] = (JSAMPLE) |
161 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) | 161 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) |
162 | >> SCALEBITS); | 162 | >> SCALEBITS); |
163 | /* Cb */ | 163 | /* Cb */ |
164 | outptr1[col] = (JSAMPLE) | 164 | outptr1[col] = (JSAMPLE) |
165 | ((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF]) | 165 | ((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF]) |
166 | >> SCALEBITS); | 166 | >> SCALEBITS); |
167 | /* Cr */ | 167 | /* Cr */ |
168 | outptr2[col] = (JSAMPLE) | 168 | outptr2[col] = (JSAMPLE) |
169 | ((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF]) | 169 | ((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF]) |
170 | >> SCALEBITS); | 170 | >> SCALEBITS); |
171 | } | 171 | } |
172 | } | 172 | } |
173 | } | 173 | } |
174 | 174 | ||
175 | 175 | ||
176 | /**************** Cases other than RGB -> YCbCr **************/ | 176 | /**************** Cases other than RGB -> YCbCr **************/ |
177 | 177 | ||
178 | 178 | ||
179 | /* | 179 | /* |
180 | * Convert some rows of samples to the JPEG colorspace. | 180 | * Convert some rows of samples to the JPEG colorspace. |
181 | * This version handles RGB->grayscale conversion, which is the same | 181 | * This version handles RGB->grayscale conversion, which is the same |
182 | * as the RGB->Y portion of RGB->YCbCr. | 182 | * as the RGB->Y portion of RGB->YCbCr. |
183 | * We assume rgb_ycc_start has been called (we only use the Y tables). | 183 | * We assume rgb_ycc_start has been called (we only use the Y tables). |
184 | */ | 184 | */ |
185 | 185 | ||
186 | METHODDEF(void) | 186 | METHODDEF(void) |
187 | rgb_gray_convert (j_compress_ptr cinfo, | 187 | rgb_gray_convert (j_compress_ptr cinfo, |
188 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, | 188 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, |
189 | JDIMENSION output_row, int num_rows) | 189 | JDIMENSION output_row, int num_rows) |
190 | { | 190 | { |
191 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 191 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
192 | register int r, g, b; | 192 | register int r, g, b; |
193 | register INT32 * ctab = cconvert->rgb_ycc_tab; | 193 | register INT32 * ctab = cconvert->rgb_ycc_tab; |
194 | register JSAMPROW inptr; | 194 | register JSAMPROW inptr; |
195 | register JSAMPROW outptr; | 195 | register JSAMPROW outptr; |
196 | register JDIMENSION col; | 196 | register JDIMENSION col; |
197 | JDIMENSION num_cols = cinfo->image_width; | 197 | JDIMENSION num_cols = cinfo->image_width; |
198 | 198 | ||
199 | while (--num_rows >= 0) { | 199 | while (--num_rows >= 0) { |
200 | inptr = *input_buf++; | 200 | inptr = *input_buf++; |
201 | outptr = output_buf[0][output_row]; | 201 | outptr = output_buf[0][output_row]; |
202 | output_row++; | 202 | output_row++; |
203 | for (col = 0; col < num_cols; col++) { | 203 | for (col = 0; col < num_cols; col++) { |
204 | r = GETJSAMPLE(inptr[RGB_RED]); | 204 | r = GETJSAMPLE(inptr[RGB_RED]); |
205 | g = GETJSAMPLE(inptr[RGB_GREEN]); | 205 | g = GETJSAMPLE(inptr[RGB_GREEN]); |
206 | b = GETJSAMPLE(inptr[RGB_BLUE]); | 206 | b = GETJSAMPLE(inptr[RGB_BLUE]); |
207 | inptr += RGB_PIXELSIZE; | 207 | inptr += RGB_PIXELSIZE; |
208 | /* Y */ | 208 | /* Y */ |
209 | outptr[col] = (JSAMPLE) | 209 | outptr[col] = (JSAMPLE) |
210 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) | 210 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) |
211 | >> SCALEBITS); | 211 | >> SCALEBITS); |
212 | } | 212 | } |
213 | } | 213 | } |
214 | } | 214 | } |
215 | 215 | ||
216 | 216 | ||
217 | /* | 217 | /* |
218 | * Convert some rows of samples to the JPEG colorspace. | 218 | * Convert some rows of samples to the JPEG colorspace. |
219 | * This version handles Adobe-style CMYK->YCCK conversion, | 219 | * This version handles Adobe-style CMYK->YCCK conversion, |
220 | * where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same | 220 | * where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same |
221 | * conversion as above, while passing K (black) unchanged. | 221 | * conversion as above, while passing K (black) unchanged. |
222 | * We assume rgb_ycc_start has been called. | 222 | * We assume rgb_ycc_start has been called. |
223 | */ | 223 | */ |
224 | 224 | ||
225 | METHODDEF(void) | 225 | METHODDEF(void) |
226 | cmyk_ycck_convert (j_compress_ptr cinfo, | 226 | cmyk_ycck_convert (j_compress_ptr cinfo, |
227 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, | 227 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, |
228 | JDIMENSION output_row, int num_rows) | 228 | JDIMENSION output_row, int num_rows) |
229 | { | 229 | { |
230 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 230 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
231 | register int r, g, b; | 231 | register int r, g, b; |
232 | register INT32 * ctab = cconvert->rgb_ycc_tab; | 232 | register INT32 * ctab = cconvert->rgb_ycc_tab; |
233 | register JSAMPROW inptr; | 233 | register JSAMPROW inptr; |
234 | register JSAMPROW outptr0, outptr1, outptr2, outptr3; | 234 | register JSAMPROW outptr0, outptr1, outptr2, outptr3; |
235 | register JDIMENSION col; | 235 | register JDIMENSION col; |
236 | JDIMENSION num_cols = cinfo->image_width; | 236 | JDIMENSION num_cols = cinfo->image_width; |
237 | 237 | ||
238 | while (--num_rows >= 0) { | 238 | while (--num_rows >= 0) { |
239 | inptr = *input_buf++; | 239 | inptr = *input_buf++; |
240 | outptr0 = output_buf[0][output_row]; | 240 | outptr0 = output_buf[0][output_row]; |
241 | outptr1 = output_buf[1][output_row]; | 241 | outptr1 = output_buf[1][output_row]; |
242 | outptr2 = output_buf[2][output_row]; | 242 | outptr2 = output_buf[2][output_row]; |
243 | outptr3 = output_buf[3][output_row]; | 243 | outptr3 = output_buf[3][output_row]; |
244 | output_row++; | 244 | output_row++; |
245 | for (col = 0; col < num_cols; col++) { | 245 | for (col = 0; col < num_cols; col++) { |
246 | r = MAXJSAMPLE - GETJSAMPLE(inptr[0]); | 246 | r = MAXJSAMPLE - GETJSAMPLE(inptr[0]); |
247 | g = MAXJSAMPLE - GETJSAMPLE(inptr[1]); | 247 | g = MAXJSAMPLE - GETJSAMPLE(inptr[1]); |
248 | b = MAXJSAMPLE - GETJSAMPLE(inptr[2]); | 248 | b = MAXJSAMPLE - GETJSAMPLE(inptr[2]); |
249 | /* K passes through as-is */ | 249 | /* K passes through as-is */ |
250 | outptr3[col] = inptr[3]; /* don't need GETJSAMPLE here */ | 250 | outptr3[col] = inptr[3]; /* don't need GETJSAMPLE here */ |
251 | inptr += 4; | 251 | inptr += 4; |
252 | /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations | 252 | /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations |
253 | * must be too; we do not need an explicit range-limiting operation. | 253 | * must be too; we do not need an explicit range-limiting operation. |
254 | * Hence the value being shifted is never negative, and we don't | 254 | * Hence the value being shifted is never negative, and we don't |
255 | * need the general RIGHT_SHIFT macro. | 255 | * need the general RIGHT_SHIFT macro. |
256 | */ | 256 | */ |
257 | /* Y */ | 257 | /* Y */ |
258 | outptr0[col] = (JSAMPLE) | 258 | outptr0[col] = (JSAMPLE) |
259 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) | 259 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) |
260 | >> SCALEBITS); | 260 | >> SCALEBITS); |
261 | /* Cb */ | 261 | /* Cb */ |
262 | outptr1[col] = (JSAMPLE) | 262 | outptr1[col] = (JSAMPLE) |
263 | ((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF]) | 263 | ((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF]) |
264 | >> SCALEBITS); | 264 | >> SCALEBITS); |
265 | /* Cr */ | 265 | /* Cr */ |
266 | outptr2[col] = (JSAMPLE) | 266 | outptr2[col] = (JSAMPLE) |
267 | ((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF]) | 267 | ((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF]) |
268 | >> SCALEBITS); | 268 | >> SCALEBITS); |
269 | } | 269 | } |
270 | } | 270 | } |
271 | } | 271 | } |
272 | 272 | ||
273 | 273 | ||
274 | /* | 274 | /* |
275 | * Convert some rows of samples to the JPEG colorspace. | 275 | * Convert some rows of samples to the JPEG colorspace. |
276 | * This version handles grayscale output with no conversion. | 276 | * This version handles grayscale output with no conversion. |
277 | * The source can be either plain grayscale or YCbCr (since Y == gray). | 277 | * The source can be either plain grayscale or YCbCr (since Y == gray). |
278 | */ | 278 | */ |
279 | 279 | ||
280 | METHODDEF(void) | 280 | METHODDEF(void) |
281 | grayscale_convert (j_compress_ptr cinfo, | 281 | grayscale_convert (j_compress_ptr cinfo, |
282 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, | 282 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, |
283 | JDIMENSION output_row, int num_rows) | 283 | JDIMENSION output_row, int num_rows) |
284 | { | 284 | { |
285 | register JSAMPROW inptr; | 285 | register JSAMPROW inptr; |
286 | register JSAMPROW outptr; | 286 | register JSAMPROW outptr; |
287 | register JDIMENSION col; | 287 | register JDIMENSION col; |
288 | JDIMENSION num_cols = cinfo->image_width; | 288 | JDIMENSION num_cols = cinfo->image_width; |
289 | int instride = cinfo->input_components; | 289 | int instride = cinfo->input_components; |
290 | 290 | ||
291 | while (--num_rows >= 0) { | 291 | while (--num_rows >= 0) { |
292 | inptr = *input_buf++; | 292 | inptr = *input_buf++; |
293 | outptr = output_buf[0][output_row]; | 293 | outptr = output_buf[0][output_row]; |
294 | output_row++; | 294 | output_row++; |
295 | for (col = 0; col < num_cols; col++) { | 295 | for (col = 0; col < num_cols; col++) { |
296 | outptr[col] = inptr[0]; /* don't need GETJSAMPLE() here */ | 296 | outptr[col] = inptr[0]; /* don't need GETJSAMPLE() here */ |
297 | inptr += instride; | 297 | inptr += instride; |
298 | } | 298 | } |
299 | } | 299 | } |
300 | } | 300 | } |
301 | 301 | ||
302 | 302 | ||
303 | /* | 303 | /* |
304 | * Convert some rows of samples to the JPEG colorspace. | 304 | * Convert some rows of samples to the JPEG colorspace. |
305 | * No colorspace conversion, but change from interleaved | 305 | * No colorspace conversion, but change from interleaved |
306 | * to separate-planes representation. | 306 | * to separate-planes representation. |
307 | */ | 307 | */ |
308 | 308 | ||
309 | METHODDEF(void) | 309 | METHODDEF(void) |
310 | rgb_convert (j_compress_ptr cinfo, | 310 | rgb_convert (j_compress_ptr cinfo, |
311 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, | 311 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, |
312 | JDIMENSION output_row, int num_rows) | 312 | JDIMENSION output_row, int num_rows) |
313 | { | 313 | { |
314 | register JSAMPROW inptr; | 314 | register JSAMPROW inptr; |
315 | register JSAMPROW outptr0, outptr1, outptr2; | 315 | register JSAMPROW outptr0, outptr1, outptr2; |
316 | register JDIMENSION col; | 316 | register JDIMENSION col; |
317 | JDIMENSION num_cols = cinfo->image_width; | 317 | JDIMENSION num_cols = cinfo->image_width; |
318 | 318 | ||
319 | while (--num_rows >= 0) { | 319 | while (--num_rows >= 0) { |
320 | inptr = *input_buf++; | 320 | inptr = *input_buf++; |
321 | outptr0 = output_buf[0][output_row]; | 321 | outptr0 = output_buf[0][output_row]; |
322 | outptr1 = output_buf[1][output_row]; | 322 | outptr1 = output_buf[1][output_row]; |
323 | outptr2 = output_buf[2][output_row]; | 323 | outptr2 = output_buf[2][output_row]; |
324 | output_row++; | 324 | output_row++; |
325 | for (col = 0; col < num_cols; col++) { | 325 | for (col = 0; col < num_cols; col++) { |
326 | /* We can dispense with GETJSAMPLE() here */ | 326 | /* We can dispense with GETJSAMPLE() here */ |
327 | outptr0[col] = inptr[RGB_RED]; | 327 | outptr0[col] = inptr[RGB_RED]; |
328 | outptr1[col] = inptr[RGB_GREEN]; | 328 | outptr1[col] = inptr[RGB_GREEN]; |
329 | outptr2[col] = inptr[RGB_BLUE]; | 329 | outptr2[col] = inptr[RGB_BLUE]; |
330 | inptr += RGB_PIXELSIZE; | 330 | inptr += RGB_PIXELSIZE; |
331 | } | 331 | } |
332 | } | 332 | } |
333 | } | 333 | } |
334 | 334 | ||
335 | 335 | ||
336 | /* | 336 | /* |
337 | * Convert some rows of samples to the JPEG colorspace. | 337 | * Convert some rows of samples to the JPEG colorspace. |
338 | * This version handles multi-component colorspaces without conversion. | 338 | * This version handles multi-component colorspaces without conversion. |
339 | * We assume input_components == num_components. | 339 | * We assume input_components == num_components. |
340 | */ | 340 | */ |
341 | 341 | ||
342 | METHODDEF(void) | 342 | METHODDEF(void) |
343 | null_convert (j_compress_ptr cinfo, | 343 | null_convert (j_compress_ptr cinfo, |
344 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, | 344 | JSAMPARRAY input_buf, JSAMPIMAGE output_buf, |
345 | JDIMENSION output_row, int num_rows) | 345 | JDIMENSION output_row, int num_rows) |
346 | { | 346 | { |
347 | register JSAMPROW inptr; | 347 | register JSAMPROW inptr; |
348 | register JSAMPROW outptr; | 348 | register JSAMPROW outptr; |
349 | register JDIMENSION col; | 349 | register JDIMENSION col; |
350 | register int ci; | 350 | register int ci; |
351 | int nc = cinfo->num_components; | 351 | int nc = cinfo->num_components; |
352 | JDIMENSION num_cols = cinfo->image_width; | 352 | JDIMENSION num_cols = cinfo->image_width; |
353 | 353 | ||
354 | while (--num_rows >= 0) { | 354 | while (--num_rows >= 0) { |
355 | /* It seems fastest to make a separate pass for each component. */ | 355 | /* It seems fastest to make a separate pass for each component. */ |
356 | for (ci = 0; ci < nc; ci++) { | 356 | for (ci = 0; ci < nc; ci++) { |
357 | inptr = *input_buf; | 357 | inptr = *input_buf; |
358 | outptr = output_buf[ci][output_row]; | 358 | outptr = output_buf[ci][output_row]; |
359 | for (col = 0; col < num_cols; col++) { | 359 | for (col = 0; col < num_cols; col++) { |
360 | outptr[col] = inptr[ci]; /* don't need GETJSAMPLE() here */ | 360 | outptr[col] = inptr[ci]; /* don't need GETJSAMPLE() here */ |
361 | inptr += nc; | 361 | inptr += nc; |
362 | } | 362 | } |
363 | } | 363 | } |
364 | input_buf++; | 364 | input_buf++; |
365 | output_row++; | 365 | output_row++; |
366 | } | 366 | } |
367 | } | 367 | } |
368 | 368 | ||
369 | 369 | ||
370 | /* | 370 | /* |
371 | * Empty method for start_pass. | 371 | * Empty method for start_pass. |
372 | */ | 372 | */ |
373 | 373 | ||
374 | METHODDEF(void) | 374 | METHODDEF(void) |
375 | null_method (j_compress_ptr cinfo) | 375 | null_method (j_compress_ptr cinfo) |
376 | { | 376 | { |
377 | /* no work needed */ | 377 | /* no work needed */ |
378 | } | 378 | } |
379 | 379 | ||
380 | 380 | ||
381 | /* | 381 | /* |
382 | * Module initialization routine for input colorspace conversion. | 382 | * Module initialization routine for input colorspace conversion. |
383 | */ | 383 | */ |
384 | 384 | ||
385 | GLOBAL(void) | 385 | GLOBAL(void) |
386 | jinit_color_converter (j_compress_ptr cinfo) | 386 | jinit_color_converter (j_compress_ptr cinfo) |
387 | { | 387 | { |
388 | my_cconvert_ptr cconvert; | 388 | my_cconvert_ptr cconvert; |
389 | 389 | ||
390 | cconvert = (my_cconvert_ptr) | 390 | cconvert = (my_cconvert_ptr) |
391 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 391 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
392 | SIZEOF(my_color_converter)); | 392 | SIZEOF(my_color_converter)); |
393 | cinfo->cconvert = (struct jpeg_color_converter *) cconvert; | 393 | cinfo->cconvert = (struct jpeg_color_converter *) cconvert; |
394 | /* set start_pass to null method until we find out differently */ | 394 | /* set start_pass to null method until we find out differently */ |
395 | cconvert->pub.start_pass = null_method; | 395 | cconvert->pub.start_pass = null_method; |
396 | 396 | ||
397 | /* Make sure input_components agrees with in_color_space */ | 397 | /* Make sure input_components agrees with in_color_space */ |
398 | switch (cinfo->in_color_space) { | 398 | switch (cinfo->in_color_space) { |
399 | case JCS_GRAYSCALE: | 399 | case JCS_GRAYSCALE: |
400 | if (cinfo->input_components != 1) | 400 | if (cinfo->input_components != 1) |
401 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); | 401 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
402 | break; | 402 | break; |
403 | 403 | ||
404 | case JCS_RGB: | 404 | case JCS_RGB: |
405 | if (cinfo->input_components != RGB_PIXELSIZE) | 405 | if (cinfo->input_components != RGB_PIXELSIZE) |
406 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); | 406 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
407 | break; | 407 | break; |
408 | 408 | ||
409 | case JCS_YCbCr: | 409 | case JCS_YCbCr: |
410 | if (cinfo->input_components != 3) | 410 | if (cinfo->input_components != 3) |
411 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); | 411 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
412 | break; | 412 | break; |
413 | 413 | ||
414 | case JCS_CMYK: | 414 | case JCS_CMYK: |
415 | case JCS_YCCK: | 415 | case JCS_YCCK: |
416 | if (cinfo->input_components != 4) | 416 | if (cinfo->input_components != 4) |
417 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); | 417 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
418 | break; | 418 | break; |
419 | 419 | ||
420 | default: /* JCS_UNKNOWN can be anything */ | 420 | default: /* JCS_UNKNOWN can be anything */ |
421 | if (cinfo->input_components < 1) | 421 | if (cinfo->input_components < 1) |
422 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); | 422 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
423 | break; | 423 | break; |
424 | } | 424 | } |
425 | 425 | ||
426 | /* Check num_components, set conversion method based on requested space */ | 426 | /* Check num_components, set conversion method based on requested space */ |
427 | switch (cinfo->jpeg_color_space) { | 427 | switch (cinfo->jpeg_color_space) { |
428 | case JCS_GRAYSCALE: | 428 | case JCS_GRAYSCALE: |
429 | if (cinfo->num_components != 1) | 429 | if (cinfo->num_components != 1) |
430 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 430 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
431 | if (cinfo->in_color_space == JCS_GRAYSCALE || | 431 | if (cinfo->in_color_space == JCS_GRAYSCALE || |
432 | cinfo->in_color_space == JCS_YCbCr) | 432 | cinfo->in_color_space == JCS_YCbCr) |
433 | cconvert->pub.color_convert = grayscale_convert; | 433 | cconvert->pub.color_convert = grayscale_convert; |
434 | else if (cinfo->in_color_space == JCS_RGB) { | 434 | else if (cinfo->in_color_space == JCS_RGB) { |
435 | cconvert->pub.start_pass = rgb_ycc_start; | 435 | cconvert->pub.start_pass = rgb_ycc_start; |
436 | cconvert->pub.color_convert = rgb_gray_convert; | 436 | cconvert->pub.color_convert = rgb_gray_convert; |
437 | } else | 437 | } else |
438 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 438 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
439 | break; | 439 | break; |
440 | 440 | ||
441 | case JCS_RGB: | 441 | case JCS_RGB: |
442 | if (cinfo->num_components != 3) | 442 | if (cinfo->num_components != 3) |
443 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 443 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
444 | if (cinfo->in_color_space == JCS_RGB) | 444 | if (cinfo->in_color_space == JCS_RGB) |
445 | cconvert->pub.color_convert = rgb_convert; | 445 | cconvert->pub.color_convert = rgb_convert; |
446 | else | 446 | else |
447 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 447 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
448 | break; | 448 | break; |
449 | 449 | ||
450 | case JCS_YCbCr: | 450 | case JCS_YCbCr: |
451 | if (cinfo->num_components != 3) | 451 | if (cinfo->num_components != 3) |
452 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 452 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
453 | if (cinfo->in_color_space == JCS_RGB) { | 453 | if (cinfo->in_color_space == JCS_RGB) { |
454 | cconvert->pub.start_pass = rgb_ycc_start; | 454 | cconvert->pub.start_pass = rgb_ycc_start; |
455 | cconvert->pub.color_convert = rgb_ycc_convert; | 455 | cconvert->pub.color_convert = rgb_ycc_convert; |
456 | } else if (cinfo->in_color_space == JCS_YCbCr) | 456 | } else if (cinfo->in_color_space == JCS_YCbCr) |
457 | cconvert->pub.color_convert = null_convert; | 457 | cconvert->pub.color_convert = null_convert; |
458 | else | 458 | else |
459 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 459 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
460 | break; | 460 | break; |
461 | 461 | ||
462 | case JCS_CMYK: | 462 | case JCS_CMYK: |
463 | if (cinfo->num_components != 4) | 463 | if (cinfo->num_components != 4) |
464 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 464 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
465 | if (cinfo->in_color_space == JCS_CMYK) | 465 | if (cinfo->in_color_space == JCS_CMYK) |
466 | cconvert->pub.color_convert = null_convert; | 466 | cconvert->pub.color_convert = null_convert; |
467 | else | 467 | else |
468 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 468 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
469 | break; | 469 | break; |
470 | 470 | ||
471 | case JCS_YCCK: | 471 | case JCS_YCCK: |
472 | if (cinfo->num_components != 4) | 472 | if (cinfo->num_components != 4) |
473 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 473 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
474 | if (cinfo->in_color_space == JCS_CMYK) { | 474 | if (cinfo->in_color_space == JCS_CMYK) { |
475 | cconvert->pub.start_pass = rgb_ycc_start; | 475 | cconvert->pub.start_pass = rgb_ycc_start; |
476 | cconvert->pub.color_convert = cmyk_ycck_convert; | 476 | cconvert->pub.color_convert = cmyk_ycck_convert; |
477 | } else if (cinfo->in_color_space == JCS_YCCK) | 477 | } else if (cinfo->in_color_space == JCS_YCCK) |
478 | cconvert->pub.color_convert = null_convert; | 478 | cconvert->pub.color_convert = null_convert; |
479 | else | 479 | else |
480 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 480 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
481 | break; | 481 | break; |
482 | 482 | ||
483 | default: /* allow null conversion of JCS_UNKNOWN */ | 483 | default: /* allow null conversion of JCS_UNKNOWN */ |
484 | if (cinfo->jpeg_color_space != cinfo->in_color_space || | 484 | if (cinfo->jpeg_color_space != cinfo->in_color_space || |
485 | cinfo->num_components != cinfo->input_components) | 485 | cinfo->num_components != cinfo->input_components) |
486 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 486 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
487 | cconvert->pub.color_convert = null_convert; | 487 | cconvert->pub.color_convert = null_convert; |
488 | break; | 488 | break; |
489 | } | 489 | } |
490 | } | 490 | } |