diff options
Diffstat (limited to '')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdcolor.c | 1024 |
1 files changed, 512 insertions, 512 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdcolor.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdcolor.c index c12d9c8..83e4d06 100644 --- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdcolor.c +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdcolor.c | |||
@@ -1,512 +1,512 @@ | |||
1 | /* | 1 | /* |
2 | * jdcolor.c | 2 | * jdcolor.c |
3 | * | 3 | * |
4 | * Copyright (C) 1991-1997, Thomas G. Lane. | 4 | * Copyright (C) 1991-1997, 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 output colorspace conversion routines. | 9 | * This file contains output 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_deconverter pub; /* public fields */ | 20 | struct jpeg_color_deconverter pub; /* public fields */ |
21 | 21 | ||
22 | /* Private state for YCC->RGB conversion */ | 22 | /* Private state for YCC->RGB conversion */ |
23 | int * Cr_r_tab; /* => table for Cr to R conversion */ | 23 | int * Cr_r_tab; /* => table for Cr to R conversion */ |
24 | int * Cb_b_tab; /* => table for Cb to B conversion */ | 24 | int * Cb_b_tab; /* => table for Cb to B conversion */ |
25 | INT32 * Cr_g_tab; /* => table for Cr to G conversion */ | 25 | INT32 * Cr_g_tab; /* => table for Cr to G conversion */ |
26 | INT32 * Cb_g_tab; /* => table for Cb to G conversion */ | 26 | INT32 * Cb_g_tab; /* => table for Cb to G conversion */ |
27 | 27 | ||
28 | /* Private state for RGB->Y conversion */ | 28 | /* Private state for RGB->Y conversion */ |
29 | INT32 * rgb_y_tab; /* => table for RGB to Y conversion */ | 29 | INT32 * rgb_y_tab; /* => table for RGB to Y conversion */ |
30 | } my_color_deconverter; | 30 | } my_color_deconverter; |
31 | 31 | ||
32 | typedef my_color_deconverter * my_cconvert_ptr; | 32 | typedef my_color_deconverter * my_cconvert_ptr; |
33 | 33 | ||
34 | 34 | ||
35 | /**************** YCbCr -> RGB conversion: most common case **************/ | 35 | /**************** YCbCr -> RGB conversion: most common case **************/ |
36 | /**************** RGB -> Y conversion: less common case **************/ | 36 | /**************** RGB -> Y conversion: less common case **************/ |
37 | 37 | ||
38 | /* | 38 | /* |
39 | * YCbCr is defined per CCIR 601-1, except that Cb and Cr are | 39 | * YCbCr is defined per CCIR 601-1, except that Cb and Cr are |
40 | * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5. | 40 | * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5. |
41 | * The conversion equations to be implemented are therefore | 41 | * The conversion equations to be implemented are therefore |
42 | * | 42 | * |
43 | * R = Y + 1.40200 * Cr | 43 | * R = Y + 1.40200 * Cr |
44 | * G = Y - 0.34414 * Cb - 0.71414 * Cr | 44 | * G = Y - 0.34414 * Cb - 0.71414 * Cr |
45 | * B = Y + 1.77200 * Cb | 45 | * B = Y + 1.77200 * Cb |
46 | * | 46 | * |
47 | * Y = 0.29900 * R + 0.58700 * G + 0.11400 * B | 47 | * Y = 0.29900 * R + 0.58700 * G + 0.11400 * B |
48 | * | 48 | * |
49 | * where Cb and Cr represent the incoming values less CENTERJSAMPLE. | 49 | * where Cb and Cr represent the incoming values less CENTERJSAMPLE. |
50 | * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.) | 50 | * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.) |
51 | * | 51 | * |
52 | * To avoid floating-point arithmetic, we represent the fractional constants | 52 | * To avoid floating-point arithmetic, we represent the fractional constants |
53 | * as integers scaled up by 2^16 (about 4 digits precision); we have to divide | 53 | * as integers scaled up by 2^16 (about 4 digits precision); we have to divide |
54 | * the products by 2^16, with appropriate rounding, to get the correct answer. | 54 | * the products by 2^16, with appropriate rounding, to get the correct answer. |
55 | * Notice that Y, being an integral input, does not contribute any fraction | 55 | * Notice that Y, being an integral input, does not contribute any fraction |
56 | * so it need not participate in the rounding. | 56 | * so it need not participate in the rounding. |
57 | * | 57 | * |
58 | * For even more speed, we avoid doing any multiplications in the inner loop | 58 | * For even more speed, we avoid doing any multiplications in the inner loop |
59 | * by precalculating the constants times Cb and Cr for all possible values. | 59 | * by precalculating the constants times Cb and Cr for all possible values. |
60 | * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table); | 60 | * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table); |
61 | * for 12-bit samples it is still acceptable. It's not very reasonable for | 61 | * for 12-bit samples it is still acceptable. It's not very reasonable for |
62 | * 16-bit samples, but if you want lossless storage you shouldn't be changing | 62 | * 16-bit samples, but if you want lossless storage you shouldn't be changing |
63 | * colorspace anyway. | 63 | * colorspace anyway. |
64 | * The Cr=>R and Cb=>B values can be rounded to integers in advance; the | 64 | * The Cr=>R and Cb=>B values can be rounded to integers in advance; the |
65 | * values for the G calculation are left scaled up, since we must add them | 65 | * values for the G calculation are left scaled up, since we must add them |
66 | * together before rounding. | 66 | * together before rounding. |
67 | */ | 67 | */ |
68 | 68 | ||
69 | #define SCALEBITS 16 /* speediest right-shift on some machines */ | 69 | #define SCALEBITS 16 /* speediest right-shift on some machines */ |
70 | #define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) | 70 | #define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) |
71 | #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) | 71 | #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) |
72 | 72 | ||
73 | /* We allocate one big table for RGB->Y conversion and divide it up into | 73 | /* We allocate one big table for RGB->Y conversion and divide it up into |
74 | * three parts, instead of doing three alloc_small requests. This lets us | 74 | * three parts, instead of doing three alloc_small requests. This lets us |
75 | * use a single table base address, which can be held in a register in the | 75 | * use a single table base address, which can be held in a register in the |
76 | * inner loops on many machines (more than can hold all three addresses, | 76 | * inner loops on many machines (more than can hold all three addresses, |
77 | * anyway). | 77 | * anyway). |
78 | */ | 78 | */ |
79 | 79 | ||
80 | #define R_Y_OFF 0 /* offset to R => Y section */ | 80 | #define R_Y_OFF 0 /* offset to R => Y section */ |
81 | #define G_Y_OFF (1*(MAXJSAMPLE+1)) /* offset to G => Y section */ | 81 | #define G_Y_OFF (1*(MAXJSAMPLE+1)) /* offset to G => Y section */ |
82 | #define B_Y_OFF (2*(MAXJSAMPLE+1)) /* etc. */ | 82 | #define B_Y_OFF (2*(MAXJSAMPLE+1)) /* etc. */ |
83 | #define TABLE_SIZE (3*(MAXJSAMPLE+1)) | 83 | #define TABLE_SIZE (3*(MAXJSAMPLE+1)) |
84 | 84 | ||
85 | 85 | ||
86 | /* | 86 | /* |
87 | * Initialize tables for YCC->RGB colorspace conversion. | 87 | * Initialize tables for YCC->RGB colorspace conversion. |
88 | */ | 88 | */ |
89 | 89 | ||
90 | LOCAL(void) | 90 | LOCAL(void) |
91 | build_ycc_rgb_table (j_decompress_ptr cinfo) | 91 | build_ycc_rgb_table (j_decompress_ptr cinfo) |
92 | { | 92 | { |
93 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 93 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
94 | int i; | 94 | int i; |
95 | INT32 x; | 95 | INT32 x; |
96 | SHIFT_TEMPS | 96 | SHIFT_TEMPS |
97 | 97 | ||
98 | cconvert->Cr_r_tab = (int *) | 98 | cconvert->Cr_r_tab = (int *) |
99 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 99 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
100 | (MAXJSAMPLE+1) * SIZEOF(int)); | 100 | (MAXJSAMPLE+1) * SIZEOF(int)); |
101 | cconvert->Cb_b_tab = (int *) | 101 | cconvert->Cb_b_tab = (int *) |
102 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 102 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
103 | (MAXJSAMPLE+1) * SIZEOF(int)); | 103 | (MAXJSAMPLE+1) * SIZEOF(int)); |
104 | cconvert->Cr_g_tab = (INT32 *) | 104 | cconvert->Cr_g_tab = (INT32 *) |
105 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 105 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
106 | (MAXJSAMPLE+1) * SIZEOF(INT32)); | 106 | (MAXJSAMPLE+1) * SIZEOF(INT32)); |
107 | cconvert->Cb_g_tab = (INT32 *) | 107 | cconvert->Cb_g_tab = (INT32 *) |
108 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 108 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
109 | (MAXJSAMPLE+1) * SIZEOF(INT32)); | 109 | (MAXJSAMPLE+1) * SIZEOF(INT32)); |
110 | 110 | ||
111 | for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) { | 111 | for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) { |
112 | /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */ | 112 | /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */ |
113 | /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */ | 113 | /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */ |
114 | /* Cr=>R value is nearest int to 1.40200 * x */ | 114 | /* Cr=>R value is nearest int to 1.40200 * x */ |
115 | cconvert->Cr_r_tab[i] = (int) | 115 | cconvert->Cr_r_tab[i] = (int) |
116 | RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS); | 116 | RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS); |
117 | /* Cb=>B value is nearest int to 1.77200 * x */ | 117 | /* Cb=>B value is nearest int to 1.77200 * x */ |
118 | cconvert->Cb_b_tab[i] = (int) | 118 | cconvert->Cb_b_tab[i] = (int) |
119 | RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS); | 119 | RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS); |
120 | /* Cr=>G value is scaled-up -0.71414 * x */ | 120 | /* Cr=>G value is scaled-up -0.71414 * x */ |
121 | cconvert->Cr_g_tab[i] = (- FIX(0.71414)) * x; | 121 | cconvert->Cr_g_tab[i] = (- FIX(0.71414)) * x; |
122 | /* Cb=>G value is scaled-up -0.34414 * x */ | 122 | /* Cb=>G value is scaled-up -0.34414 * x */ |
123 | /* We also add in ONE_HALF so that need not do it in inner loop */ | 123 | /* We also add in ONE_HALF so that need not do it in inner loop */ |
124 | cconvert->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF; | 124 | cconvert->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF; |
125 | } | 125 | } |
126 | } | 126 | } |
127 | 127 | ||
128 | 128 | ||
129 | /* | 129 | /* |
130 | * Convert some rows of samples to the output colorspace. | 130 | * Convert some rows of samples to the output colorspace. |
131 | * | 131 | * |
132 | * Note that we change from noninterleaved, one-plane-per-component format | 132 | * Note that we change from noninterleaved, one-plane-per-component format |
133 | * to interleaved-pixel format. The output buffer is therefore three times | 133 | * to interleaved-pixel format. The output buffer is therefore three times |
134 | * as wide as the input buffer. | 134 | * as wide as the input buffer. |
135 | * A starting row offset is provided only for the input buffer. The caller | 135 | * A starting row offset is provided only for the input buffer. The caller |
136 | * can easily adjust the passed output_buf value to accommodate any row | 136 | * can easily adjust the passed output_buf value to accommodate any row |
137 | * offset required on that side. | 137 | * offset required on that side. |
138 | */ | 138 | */ |
139 | 139 | ||
140 | METHODDEF(void) | 140 | METHODDEF(void) |
141 | ycc_rgb_convert (j_decompress_ptr cinfo, | 141 | ycc_rgb_convert (j_decompress_ptr cinfo, |
142 | JSAMPIMAGE input_buf, JDIMENSION input_row, | 142 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
143 | JSAMPARRAY output_buf, int num_rows) | 143 | JSAMPARRAY output_buf, int num_rows) |
144 | { | 144 | { |
145 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 145 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
146 | register int y, cb, cr; | 146 | register int y, cb, cr; |
147 | register JSAMPROW outptr; | 147 | register JSAMPROW outptr; |
148 | register JSAMPROW inptr0, inptr1, inptr2; | 148 | register JSAMPROW inptr0, inptr1, inptr2; |
149 | register JDIMENSION col; | 149 | register JDIMENSION col; |
150 | JDIMENSION num_cols = cinfo->output_width; | 150 | JDIMENSION num_cols = cinfo->output_width; |
151 | /* copy these pointers into registers if possible */ | 151 | /* copy these pointers into registers if possible */ |
152 | register JSAMPLE * range_limit = cinfo->sample_range_limit; | 152 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
153 | register int * Crrtab = cconvert->Cr_r_tab; | 153 | register int * Crrtab = cconvert->Cr_r_tab; |
154 | register int * Cbbtab = cconvert->Cb_b_tab; | 154 | register int * Cbbtab = cconvert->Cb_b_tab; |
155 | register INT32 * Crgtab = cconvert->Cr_g_tab; | 155 | register INT32 * Crgtab = cconvert->Cr_g_tab; |
156 | register INT32 * Cbgtab = cconvert->Cb_g_tab; | 156 | register INT32 * Cbgtab = cconvert->Cb_g_tab; |
157 | SHIFT_TEMPS | 157 | SHIFT_TEMPS |
158 | 158 | ||
159 | while (--num_rows >= 0) { | 159 | while (--num_rows >= 0) { |
160 | inptr0 = input_buf[0][input_row]; | 160 | inptr0 = input_buf[0][input_row]; |
161 | inptr1 = input_buf[1][input_row]; | 161 | inptr1 = input_buf[1][input_row]; |
162 | inptr2 = input_buf[2][input_row]; | 162 | inptr2 = input_buf[2][input_row]; |
163 | input_row++; | 163 | input_row++; |
164 | outptr = *output_buf++; | 164 | outptr = *output_buf++; |
165 | for (col = 0; col < num_cols; col++) { | 165 | for (col = 0; col < num_cols; col++) { |
166 | y = GETJSAMPLE(inptr0[col]); | 166 | y = GETJSAMPLE(inptr0[col]); |
167 | cb = GETJSAMPLE(inptr1[col]); | 167 | cb = GETJSAMPLE(inptr1[col]); |
168 | cr = GETJSAMPLE(inptr2[col]); | 168 | cr = GETJSAMPLE(inptr2[col]); |
169 | /* Range-limiting is essential due to noise introduced by DCT losses. */ | 169 | /* Range-limiting is essential due to noise introduced by DCT losses. */ |
170 | outptr[RGB_RED] = range_limit[y + Crrtab[cr]]; | 170 | outptr[RGB_RED] = range_limit[y + Crrtab[cr]]; |
171 | outptr[RGB_GREEN] = range_limit[y + | 171 | outptr[RGB_GREEN] = range_limit[y + |
172 | ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], | 172 | ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
173 | SCALEBITS))]; | 173 | SCALEBITS))]; |
174 | outptr[RGB_BLUE] = range_limit[y + Cbbtab[cb]]; | 174 | outptr[RGB_BLUE] = range_limit[y + Cbbtab[cb]]; |
175 | outptr += RGB_PIXELSIZE; | 175 | outptr += RGB_PIXELSIZE; |
176 | } | 176 | } |
177 | } | 177 | } |
178 | } | 178 | } |
179 | 179 | ||
180 | 180 | ||
181 | /**************** Cases other than YCbCr -> RGB **************/ | 181 | /**************** Cases other than YCbCr -> RGB **************/ |
182 | 182 | ||
183 | 183 | ||
184 | /* | 184 | /* |
185 | * Initialize for RGB->grayscale colorspace conversion. | 185 | * Initialize for RGB->grayscale colorspace conversion. |
186 | */ | 186 | */ |
187 | 187 | ||
188 | LOCAL(void) | 188 | LOCAL(void) |
189 | build_rgb_y_table (j_decompress_ptr cinfo) | 189 | build_rgb_y_table (j_decompress_ptr cinfo) |
190 | { | 190 | { |
191 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 191 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
192 | INT32 * rgb_y_tab; | 192 | INT32 * rgb_y_tab; |
193 | INT32 i; | 193 | INT32 i; |
194 | 194 | ||
195 | /* Allocate and fill in the conversion tables. */ | 195 | /* Allocate and fill in the conversion tables. */ |
196 | cconvert->rgb_y_tab = rgb_y_tab = (INT32 *) | 196 | cconvert->rgb_y_tab = rgb_y_tab = (INT32 *) |
197 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 197 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
198 | (TABLE_SIZE * SIZEOF(INT32))); | 198 | (TABLE_SIZE * SIZEOF(INT32))); |
199 | 199 | ||
200 | for (i = 0; i <= MAXJSAMPLE; i++) { | 200 | for (i = 0; i <= MAXJSAMPLE; i++) { |
201 | rgb_y_tab[i+R_Y_OFF] = FIX(0.29900) * i; | 201 | rgb_y_tab[i+R_Y_OFF] = FIX(0.29900) * i; |
202 | rgb_y_tab[i+G_Y_OFF] = FIX(0.58700) * i; | 202 | rgb_y_tab[i+G_Y_OFF] = FIX(0.58700) * i; |
203 | rgb_y_tab[i+B_Y_OFF] = FIX(0.11400) * i + ONE_HALF; | 203 | rgb_y_tab[i+B_Y_OFF] = FIX(0.11400) * i + ONE_HALF; |
204 | } | 204 | } |
205 | } | 205 | } |
206 | 206 | ||
207 | 207 | ||
208 | /* | 208 | /* |
209 | * Convert RGB to grayscale. | 209 | * Convert RGB to grayscale. |
210 | */ | 210 | */ |
211 | 211 | ||
212 | METHODDEF(void) | 212 | METHODDEF(void) |
213 | rgb_gray_convert (j_decompress_ptr cinfo, | 213 | rgb_gray_convert (j_decompress_ptr cinfo, |
214 | JSAMPIMAGE input_buf, JDIMENSION input_row, | 214 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
215 | JSAMPARRAY output_buf, int num_rows) | 215 | JSAMPARRAY output_buf, int num_rows) |
216 | { | 216 | { |
217 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 217 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
218 | register int r, g, b; | 218 | register int r, g, b; |
219 | register INT32 * ctab = cconvert->rgb_y_tab; | 219 | register INT32 * ctab = cconvert->rgb_y_tab; |
220 | register JSAMPROW outptr; | 220 | register JSAMPROW outptr; |
221 | register JSAMPROW inptr0, inptr1, inptr2; | 221 | register JSAMPROW inptr0, inptr1, inptr2; |
222 | register JDIMENSION col; | 222 | register JDIMENSION col; |
223 | JDIMENSION num_cols = cinfo->output_width; | 223 | JDIMENSION num_cols = cinfo->output_width; |
224 | 224 | ||
225 | while (--num_rows >= 0) { | 225 | while (--num_rows >= 0) { |
226 | inptr0 = input_buf[0][input_row]; | 226 | inptr0 = input_buf[0][input_row]; |
227 | inptr1 = input_buf[1][input_row]; | 227 | inptr1 = input_buf[1][input_row]; |
228 | inptr2 = input_buf[2][input_row]; | 228 | inptr2 = input_buf[2][input_row]; |
229 | input_row++; | 229 | input_row++; |
230 | outptr = *output_buf++; | 230 | outptr = *output_buf++; |
231 | for (col = 0; col < num_cols; col++) { | 231 | for (col = 0; col < num_cols; col++) { |
232 | r = GETJSAMPLE(inptr0[col]); | 232 | r = GETJSAMPLE(inptr0[col]); |
233 | g = GETJSAMPLE(inptr1[col]); | 233 | g = GETJSAMPLE(inptr1[col]); |
234 | b = GETJSAMPLE(inptr2[col]); | 234 | b = GETJSAMPLE(inptr2[col]); |
235 | /* Y */ | 235 | /* Y */ |
236 | outptr[col] = (JSAMPLE) | 236 | outptr[col] = (JSAMPLE) |
237 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) | 237 | ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) |
238 | >> SCALEBITS); | 238 | >> SCALEBITS); |
239 | } | 239 | } |
240 | } | 240 | } |
241 | } | 241 | } |
242 | 242 | ||
243 | 243 | ||
244 | /* | 244 | /* |
245 | * No colorspace change, but conversion from separate-planes | 245 | * No colorspace change, but conversion from separate-planes |
246 | * to interleaved representation. | 246 | * to interleaved representation. |
247 | */ | 247 | */ |
248 | 248 | ||
249 | METHODDEF(void) | 249 | METHODDEF(void) |
250 | rgb_convert (j_decompress_ptr cinfo, | 250 | rgb_convert (j_decompress_ptr cinfo, |
251 | JSAMPIMAGE input_buf, JDIMENSION input_row, | 251 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
252 | JSAMPARRAY output_buf, int num_rows) | 252 | JSAMPARRAY output_buf, int num_rows) |
253 | { | 253 | { |
254 | register JSAMPROW outptr; | 254 | register JSAMPROW outptr; |
255 | register JSAMPROW inptr0, inptr1, inptr2; | 255 | register JSAMPROW inptr0, inptr1, inptr2; |
256 | register JDIMENSION col; | 256 | register JDIMENSION col; |
257 | JDIMENSION num_cols = cinfo->output_width; | 257 | JDIMENSION num_cols = cinfo->output_width; |
258 | 258 | ||
259 | while (--num_rows >= 0) { | 259 | while (--num_rows >= 0) { |
260 | inptr0 = input_buf[0][input_row]; | 260 | inptr0 = input_buf[0][input_row]; |
261 | inptr1 = input_buf[1][input_row]; | 261 | inptr1 = input_buf[1][input_row]; |
262 | inptr2 = input_buf[2][input_row]; | 262 | inptr2 = input_buf[2][input_row]; |
263 | input_row++; | 263 | input_row++; |
264 | outptr = *output_buf++; | 264 | outptr = *output_buf++; |
265 | for (col = 0; col < num_cols; col++) { | 265 | for (col = 0; col < num_cols; col++) { |
266 | /* We can dispense with GETJSAMPLE() here */ | 266 | /* We can dispense with GETJSAMPLE() here */ |
267 | outptr[RGB_RED] = inptr0[col]; | 267 | outptr[RGB_RED] = inptr0[col]; |
268 | outptr[RGB_GREEN] = inptr1[col]; | 268 | outptr[RGB_GREEN] = inptr1[col]; |
269 | outptr[RGB_BLUE] = inptr2[col]; | 269 | outptr[RGB_BLUE] = inptr2[col]; |
270 | outptr += RGB_PIXELSIZE; | 270 | outptr += RGB_PIXELSIZE; |
271 | } | 271 | } |
272 | } | 272 | } |
273 | } | 273 | } |
274 | 274 | ||
275 | 275 | ||
276 | /* | 276 | /* |
277 | * Color conversion for no colorspace change: just copy the data, | 277 | * Color conversion for no colorspace change: just copy the data, |
278 | * converting from separate-planes to interleaved representation. | 278 | * converting from separate-planes to interleaved representation. |
279 | */ | 279 | */ |
280 | 280 | ||
281 | METHODDEF(void) | 281 | METHODDEF(void) |
282 | null_convert (j_decompress_ptr cinfo, | 282 | null_convert (j_decompress_ptr cinfo, |
283 | JSAMPIMAGE input_buf, JDIMENSION input_row, | 283 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
284 | JSAMPARRAY output_buf, int num_rows) | 284 | JSAMPARRAY output_buf, int num_rows) |
285 | { | 285 | { |
286 | register JSAMPROW inptr, outptr; | 286 | register JSAMPROW inptr, outptr; |
287 | register JDIMENSION count; | 287 | register JDIMENSION count; |
288 | register int num_components = cinfo->num_components; | 288 | register int num_components = cinfo->num_components; |
289 | JDIMENSION num_cols = cinfo->output_width; | 289 | JDIMENSION num_cols = cinfo->output_width; |
290 | int ci; | 290 | int ci; |
291 | 291 | ||
292 | while (--num_rows >= 0) { | 292 | while (--num_rows >= 0) { |
293 | for (ci = 0; ci < num_components; ci++) { | 293 | for (ci = 0; ci < num_components; ci++) { |
294 | inptr = input_buf[ci][input_row]; | 294 | inptr = input_buf[ci][input_row]; |
295 | outptr = output_buf[0] + ci; | 295 | outptr = output_buf[0] + ci; |
296 | for (count = num_cols; count > 0; count--) { | 296 | for (count = num_cols; count > 0; count--) { |
297 | *outptr = *inptr++; /* needn't bother with GETJSAMPLE() here */ | 297 | *outptr = *inptr++; /* needn't bother with GETJSAMPLE() here */ |
298 | outptr += num_components; | 298 | outptr += num_components; |
299 | } | 299 | } |
300 | } | 300 | } |
301 | input_row++; | 301 | input_row++; |
302 | output_buf++; | 302 | output_buf++; |
303 | } | 303 | } |
304 | } | 304 | } |
305 | 305 | ||
306 | 306 | ||
307 | /* | 307 | /* |
308 | * Color conversion for grayscale: just copy the data. | 308 | * Color conversion for grayscale: just copy the data. |
309 | * This also works for YCbCr -> grayscale conversion, in which | 309 | * This also works for YCbCr -> grayscale conversion, in which |
310 | * we just copy the Y (luminance) component and ignore chrominance. | 310 | * we just copy the Y (luminance) component and ignore chrominance. |
311 | */ | 311 | */ |
312 | 312 | ||
313 | METHODDEF(void) | 313 | METHODDEF(void) |
314 | grayscale_convert (j_decompress_ptr cinfo, | 314 | grayscale_convert (j_decompress_ptr cinfo, |
315 | JSAMPIMAGE input_buf, JDIMENSION input_row, | 315 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
316 | JSAMPARRAY output_buf, int num_rows) | 316 | JSAMPARRAY output_buf, int num_rows) |
317 | { | 317 | { |
318 | jcopy_sample_rows(input_buf[0], (int) input_row, output_buf, 0, | 318 | jcopy_sample_rows(input_buf[0], (int) input_row, output_buf, 0, |
319 | num_rows, cinfo->output_width); | 319 | num_rows, cinfo->output_width); |
320 | } | 320 | } |
321 | 321 | ||
322 | 322 | ||
323 | /* | 323 | /* |
324 | * Convert grayscale to RGB: just duplicate the graylevel three times. | 324 | * Convert grayscale to RGB: just duplicate the graylevel three times. |
325 | * This is provided to support applications that don't want to cope | 325 | * This is provided to support applications that don't want to cope |
326 | * with grayscale as a separate case. | 326 | * with grayscale as a separate case. |
327 | */ | 327 | */ |
328 | 328 | ||
329 | METHODDEF(void) | 329 | METHODDEF(void) |
330 | gray_rgb_convert (j_decompress_ptr cinfo, | 330 | gray_rgb_convert (j_decompress_ptr cinfo, |
331 | JSAMPIMAGE input_buf, JDIMENSION input_row, | 331 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
332 | JSAMPARRAY output_buf, int num_rows) | 332 | JSAMPARRAY output_buf, int num_rows) |
333 | { | 333 | { |
334 | register JSAMPROW inptr, outptr; | 334 | register JSAMPROW inptr, outptr; |
335 | register JDIMENSION col; | 335 | register JDIMENSION col; |
336 | JDIMENSION num_cols = cinfo->output_width; | 336 | JDIMENSION num_cols = cinfo->output_width; |
337 | 337 | ||
338 | while (--num_rows >= 0) { | 338 | while (--num_rows >= 0) { |
339 | inptr = input_buf[0][input_row++]; | 339 | inptr = input_buf[0][input_row++]; |
340 | outptr = *output_buf++; | 340 | outptr = *output_buf++; |
341 | for (col = 0; col < num_cols; col++) { | 341 | for (col = 0; col < num_cols; col++) { |
342 | /* We can dispense with GETJSAMPLE() here */ | 342 | /* We can dispense with GETJSAMPLE() here */ |
343 | outptr[RGB_RED] = outptr[RGB_GREEN] = outptr[RGB_BLUE] = inptr[col]; | 343 | outptr[RGB_RED] = outptr[RGB_GREEN] = outptr[RGB_BLUE] = inptr[col]; |
344 | outptr += RGB_PIXELSIZE; | 344 | outptr += RGB_PIXELSIZE; |
345 | } | 345 | } |
346 | } | 346 | } |
347 | } | 347 | } |
348 | 348 | ||
349 | 349 | ||
350 | /* | 350 | /* |
351 | * Adobe-style YCCK->CMYK conversion. | 351 | * Adobe-style YCCK->CMYK conversion. |
352 | * We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same | 352 | * We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same |
353 | * conversion as above, while passing K (black) unchanged. | 353 | * conversion as above, while passing K (black) unchanged. |
354 | * We assume build_ycc_rgb_table has been called. | 354 | * We assume build_ycc_rgb_table has been called. |
355 | */ | 355 | */ |
356 | 356 | ||
357 | METHODDEF(void) | 357 | METHODDEF(void) |
358 | ycck_cmyk_convert (j_decompress_ptr cinfo, | 358 | ycck_cmyk_convert (j_decompress_ptr cinfo, |
359 | JSAMPIMAGE input_buf, JDIMENSION input_row, | 359 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
360 | JSAMPARRAY output_buf, int num_rows) | 360 | JSAMPARRAY output_buf, int num_rows) |
361 | { | 361 | { |
362 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; | 362 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
363 | register int y, cb, cr; | 363 | register int y, cb, cr; |
364 | register JSAMPROW outptr; | 364 | register JSAMPROW outptr; |
365 | register JSAMPROW inptr0, inptr1, inptr2, inptr3; | 365 | register JSAMPROW inptr0, inptr1, inptr2, inptr3; |
366 | register JDIMENSION col; | 366 | register JDIMENSION col; |
367 | JDIMENSION num_cols = cinfo->output_width; | 367 | JDIMENSION num_cols = cinfo->output_width; |
368 | /* copy these pointers into registers if possible */ | 368 | /* copy these pointers into registers if possible */ |
369 | register JSAMPLE * range_limit = cinfo->sample_range_limit; | 369 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
370 | register int * Crrtab = cconvert->Cr_r_tab; | 370 | register int * Crrtab = cconvert->Cr_r_tab; |
371 | register int * Cbbtab = cconvert->Cb_b_tab; | 371 | register int * Cbbtab = cconvert->Cb_b_tab; |
372 | register INT32 * Crgtab = cconvert->Cr_g_tab; | 372 | register INT32 * Crgtab = cconvert->Cr_g_tab; |
373 | register INT32 * Cbgtab = cconvert->Cb_g_tab; | 373 | register INT32 * Cbgtab = cconvert->Cb_g_tab; |
374 | SHIFT_TEMPS | 374 | SHIFT_TEMPS |
375 | 375 | ||
376 | while (--num_rows >= 0) { | 376 | while (--num_rows >= 0) { |
377 | inptr0 = input_buf[0][input_row]; | 377 | inptr0 = input_buf[0][input_row]; |
378 | inptr1 = input_buf[1][input_row]; | 378 | inptr1 = input_buf[1][input_row]; |
379 | inptr2 = input_buf[2][input_row]; | 379 | inptr2 = input_buf[2][input_row]; |
380 | inptr3 = input_buf[3][input_row]; | 380 | inptr3 = input_buf[3][input_row]; |
381 | input_row++; | 381 | input_row++; |
382 | outptr = *output_buf++; | 382 | outptr = *output_buf++; |
383 | for (col = 0; col < num_cols; col++) { | 383 | for (col = 0; col < num_cols; col++) { |
384 | y = GETJSAMPLE(inptr0[col]); | 384 | y = GETJSAMPLE(inptr0[col]); |
385 | cb = GETJSAMPLE(inptr1[col]); | 385 | cb = GETJSAMPLE(inptr1[col]); |
386 | cr = GETJSAMPLE(inptr2[col]); | 386 | cr = GETJSAMPLE(inptr2[col]); |
387 | /* Range-limiting is essential due to noise introduced by DCT losses. */ | 387 | /* Range-limiting is essential due to noise introduced by DCT losses. */ |
388 | outptr[0] = range_limit[MAXJSAMPLE - (y + Crrtab[cr])]; /* red */ | 388 | outptr[0] = range_limit[MAXJSAMPLE - (y + Crrtab[cr])]; /* red */ |
389 | outptr[1] = range_limit[MAXJSAMPLE - (y + /* green */ | 389 | outptr[1] = range_limit[MAXJSAMPLE - (y + /* green */ |
390 | ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], | 390 | ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
391 | SCALEBITS)))]; | 391 | SCALEBITS)))]; |
392 | outptr[2] = range_limit[MAXJSAMPLE - (y + Cbbtab[cb])]; /* blue */ | 392 | outptr[2] = range_limit[MAXJSAMPLE - (y + Cbbtab[cb])]; /* blue */ |
393 | /* K passes through unchanged */ | 393 | /* K passes through unchanged */ |
394 | outptr[3] = inptr3[col]; /* don't need GETJSAMPLE here */ | 394 | outptr[3] = inptr3[col]; /* don't need GETJSAMPLE here */ |
395 | outptr += 4; | 395 | outptr += 4; |
396 | } | 396 | } |
397 | } | 397 | } |
398 | } | 398 | } |
399 | 399 | ||
400 | 400 | ||
401 | /* | 401 | /* |
402 | * Empty method for start_pass. | 402 | * Empty method for start_pass. |
403 | */ | 403 | */ |
404 | 404 | ||
405 | METHODDEF(void) | 405 | METHODDEF(void) |
406 | start_pass_dcolor (j_decompress_ptr cinfo) | 406 | start_pass_dcolor (j_decompress_ptr cinfo) |
407 | { | 407 | { |
408 | /* no work needed */ | 408 | /* no work needed */ |
409 | } | 409 | } |
410 | 410 | ||
411 | 411 | ||
412 | /* | 412 | /* |
413 | * Module initialization routine for output colorspace conversion. | 413 | * Module initialization routine for output colorspace conversion. |
414 | */ | 414 | */ |
415 | 415 | ||
416 | GLOBAL(void) | 416 | GLOBAL(void) |
417 | jinit_color_deconverter (j_decompress_ptr cinfo) | 417 | jinit_color_deconverter (j_decompress_ptr cinfo) |
418 | { | 418 | { |
419 | my_cconvert_ptr cconvert; | 419 | my_cconvert_ptr cconvert; |
420 | int ci; | 420 | int ci; |
421 | 421 | ||
422 | cconvert = (my_cconvert_ptr) | 422 | cconvert = (my_cconvert_ptr) |
423 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 423 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
424 | SIZEOF(my_color_deconverter)); | 424 | SIZEOF(my_color_deconverter)); |
425 | cinfo->cconvert = (struct jpeg_color_deconverter *) cconvert; | 425 | cinfo->cconvert = (struct jpeg_color_deconverter *) cconvert; |
426 | cconvert->pub.start_pass = start_pass_dcolor; | 426 | cconvert->pub.start_pass = start_pass_dcolor; |
427 | 427 | ||
428 | /* Make sure num_components agrees with jpeg_color_space */ | 428 | /* Make sure num_components agrees with jpeg_color_space */ |
429 | switch (cinfo->jpeg_color_space) { | 429 | switch (cinfo->jpeg_color_space) { |
430 | case JCS_GRAYSCALE: | 430 | case JCS_GRAYSCALE: |
431 | if (cinfo->num_components != 1) | 431 | if (cinfo->num_components != 1) |
432 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 432 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
433 | break; | 433 | break; |
434 | 434 | ||
435 | case JCS_RGB: | 435 | case JCS_RGB: |
436 | case JCS_YCbCr: | 436 | case JCS_YCbCr: |
437 | if (cinfo->num_components != 3) | 437 | if (cinfo->num_components != 3) |
438 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 438 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
439 | break; | 439 | break; |
440 | 440 | ||
441 | case JCS_CMYK: | 441 | case JCS_CMYK: |
442 | case JCS_YCCK: | 442 | case JCS_YCCK: |
443 | if (cinfo->num_components != 4) | 443 | if (cinfo->num_components != 4) |
444 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 444 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
445 | break; | 445 | break; |
446 | 446 | ||
447 | default: /* JCS_UNKNOWN can be anything */ | 447 | default: /* JCS_UNKNOWN can be anything */ |
448 | if (cinfo->num_components < 1) | 448 | if (cinfo->num_components < 1) |
449 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); | 449 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
450 | break; | 450 | break; |
451 | } | 451 | } |
452 | 452 | ||
453 | /* Set out_color_components and conversion method based on requested space. | 453 | /* Set out_color_components and conversion method based on requested space. |
454 | * Also clear the component_needed flags for any unused components, | 454 | * Also clear the component_needed flags for any unused components, |
455 | * so that earlier pipeline stages can avoid useless computation. | 455 | * so that earlier pipeline stages can avoid useless computation. |
456 | */ | 456 | */ |
457 | 457 | ||
458 | switch (cinfo->out_color_space) { | 458 | switch (cinfo->out_color_space) { |
459 | case JCS_GRAYSCALE: | 459 | case JCS_GRAYSCALE: |
460 | cinfo->out_color_components = 1; | 460 | cinfo->out_color_components = 1; |
461 | if (cinfo->jpeg_color_space == JCS_GRAYSCALE || | 461 | if (cinfo->jpeg_color_space == JCS_GRAYSCALE || |
462 | cinfo->jpeg_color_space == JCS_YCbCr) { | 462 | cinfo->jpeg_color_space == JCS_YCbCr) { |
463 | cconvert->pub.color_convert = grayscale_convert; | 463 | cconvert->pub.color_convert = grayscale_convert; |
464 | /* For color->grayscale conversion, only the Y (0) component is needed */ | 464 | /* For color->grayscale conversion, only the Y (0) component is needed */ |
465 | for (ci = 1; ci < cinfo->num_components; ci++) | 465 | for (ci = 1; ci < cinfo->num_components; ci++) |
466 | cinfo->comp_info[ci].component_needed = FALSE; | 466 | cinfo->comp_info[ci].component_needed = FALSE; |
467 | } else if (cinfo->jpeg_color_space == JCS_RGB) { | 467 | } else if (cinfo->jpeg_color_space == JCS_RGB) { |
468 | cconvert->pub.color_convert = rgb_gray_convert; | 468 | cconvert->pub.color_convert = rgb_gray_convert; |
469 | build_rgb_y_table(cinfo); | 469 | build_rgb_y_table(cinfo); |
470 | } else | 470 | } else |
471 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 471 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
472 | break; | 472 | break; |
473 | 473 | ||
474 | case JCS_RGB: | 474 | case JCS_RGB: |
475 | cinfo->out_color_components = RGB_PIXELSIZE; | 475 | cinfo->out_color_components = RGB_PIXELSIZE; |
476 | if (cinfo->jpeg_color_space == JCS_YCbCr) { | 476 | if (cinfo->jpeg_color_space == JCS_YCbCr) { |
477 | cconvert->pub.color_convert = ycc_rgb_convert; | 477 | cconvert->pub.color_convert = ycc_rgb_convert; |
478 | build_ycc_rgb_table(cinfo); | 478 | build_ycc_rgb_table(cinfo); |
479 | } else if (cinfo->jpeg_color_space == JCS_GRAYSCALE) { | 479 | } else if (cinfo->jpeg_color_space == JCS_GRAYSCALE) { |
480 | cconvert->pub.color_convert = gray_rgb_convert; | 480 | cconvert->pub.color_convert = gray_rgb_convert; |
481 | } else if (cinfo->jpeg_color_space == JCS_RGB) { | 481 | } else if (cinfo->jpeg_color_space == JCS_RGB) { |
482 | cconvert->pub.color_convert = rgb_convert; | 482 | cconvert->pub.color_convert = rgb_convert; |
483 | } else | 483 | } else |
484 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 484 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
485 | break; | 485 | break; |
486 | 486 | ||
487 | case JCS_CMYK: | 487 | case JCS_CMYK: |
488 | cinfo->out_color_components = 4; | 488 | cinfo->out_color_components = 4; |
489 | if (cinfo->jpeg_color_space == JCS_YCCK) { | 489 | if (cinfo->jpeg_color_space == JCS_YCCK) { |
490 | cconvert->pub.color_convert = ycck_cmyk_convert; | 490 | cconvert->pub.color_convert = ycck_cmyk_convert; |
491 | build_ycc_rgb_table(cinfo); | 491 | build_ycc_rgb_table(cinfo); |
492 | } else if (cinfo->jpeg_color_space == JCS_CMYK) { | 492 | } else if (cinfo->jpeg_color_space == JCS_CMYK) { |
493 | cconvert->pub.color_convert = null_convert; | 493 | cconvert->pub.color_convert = null_convert; |
494 | } else | 494 | } else |
495 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 495 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
496 | break; | 496 | break; |
497 | 497 | ||
498 | default: | 498 | default: |
499 | /* Permit null conversion to same output space */ | 499 | /* Permit null conversion to same output space */ |
500 | if (cinfo->out_color_space == cinfo->jpeg_color_space) { | 500 | if (cinfo->out_color_space == cinfo->jpeg_color_space) { |
501 | cinfo->out_color_components = cinfo->num_components; | 501 | cinfo->out_color_components = cinfo->num_components; |
502 | cconvert->pub.color_convert = null_convert; | 502 | cconvert->pub.color_convert = null_convert; |
503 | } else /* unsupported non-null conversion */ | 503 | } else /* unsupported non-null conversion */ |
504 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); | 504 | ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); |
505 | break; | 505 | break; |
506 | } | 506 | } |
507 | 507 | ||
508 | if (cinfo->quantize_colors) | 508 | if (cinfo->quantize_colors) |
509 | cinfo->output_components = 1; /* single colormapped output component */ | 509 | cinfo->output_components = 1; /* single colormapped output component */ |
510 | else | 510 | else |
511 | cinfo->output_components = cinfo->out_color_components; | 511 | cinfo->output_components = cinfo->out_color_components; |
512 | } | 512 | } |