Aaron Gable | feec46f | 2015-08-06 09:54:48 -0700 | [diff] [blame] | 1 | /* |
| 2 | * jdcol565.c |
| 3 | * |
| 4 | * This file was part of the Independent JPEG Group's software: |
| 5 | * Copyright (C) 1991-1997, Thomas G. Lane. |
| 6 | * Modifications: |
| 7 | * Copyright (C) 2013, Linaro Limited. |
| 8 | * Copyright (C) 2014, D. R. Commander. |
| 9 | * For conditions of distribution and use, see the accompanying README file. |
| 10 | * |
| 11 | * This file contains output colorspace conversion routines. |
| 12 | */ |
| 13 | |
| 14 | /* This file is included by jdcolor.c */ |
| 15 | |
| 16 | |
| 17 | INLINE |
| 18 | LOCAL(void) |
| 19 | ycc_rgb565_convert_internal (j_decompress_ptr cinfo, |
| 20 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 21 | JSAMPARRAY output_buf, int num_rows) |
| 22 | { |
| 23 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
| 24 | register int y, cb, cr; |
| 25 | register JSAMPROW outptr; |
| 26 | register JSAMPROW inptr0, inptr1, inptr2; |
| 27 | register JDIMENSION col; |
| 28 | JDIMENSION num_cols = cinfo->output_width; |
| 29 | /* copy these pointers into registers if possible */ |
| 30 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 31 | register int * Crrtab = cconvert->Cr_r_tab; |
| 32 | register int * Cbbtab = cconvert->Cb_b_tab; |
| 33 | register INT32 * Crgtab = cconvert->Cr_g_tab; |
| 34 | register INT32 * Cbgtab = cconvert->Cb_g_tab; |
| 35 | SHIFT_TEMPS |
| 36 | |
| 37 | while (--num_rows >= 0) { |
| 38 | INT32 rgb; |
| 39 | unsigned int r, g, b; |
| 40 | inptr0 = input_buf[0][input_row]; |
| 41 | inptr1 = input_buf[1][input_row]; |
| 42 | inptr2 = input_buf[2][input_row]; |
| 43 | input_row++; |
| 44 | outptr = *output_buf++; |
| 45 | |
| 46 | if (PACK_NEED_ALIGNMENT(outptr)) { |
| 47 | y = GETJSAMPLE(*inptr0++); |
| 48 | cb = GETJSAMPLE(*inptr1++); |
| 49 | cr = GETJSAMPLE(*inptr2++); |
| 50 | r = range_limit[y + Crrtab[cr]]; |
| 51 | g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 52 | SCALEBITS))]; |
| 53 | b = range_limit[y + Cbbtab[cb]]; |
| 54 | rgb = PACK_SHORT_565(r, g, b); |
| 55 | *(INT16*)outptr = rgb; |
| 56 | outptr += 2; |
| 57 | num_cols--; |
| 58 | } |
| 59 | for (col = 0; col < (num_cols >> 1); col++) { |
| 60 | y = GETJSAMPLE(*inptr0++); |
| 61 | cb = GETJSAMPLE(*inptr1++); |
| 62 | cr = GETJSAMPLE(*inptr2++); |
| 63 | r = range_limit[y + Crrtab[cr]]; |
| 64 | g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 65 | SCALEBITS))]; |
| 66 | b = range_limit[y + Cbbtab[cb]]; |
| 67 | rgb = PACK_SHORT_565(r, g, b); |
| 68 | |
| 69 | y = GETJSAMPLE(*inptr0++); |
| 70 | cb = GETJSAMPLE(*inptr1++); |
| 71 | cr = GETJSAMPLE(*inptr2++); |
| 72 | r = range_limit[y + Crrtab[cr]]; |
| 73 | g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 74 | SCALEBITS))]; |
| 75 | b = range_limit[y + Cbbtab[cb]]; |
| 76 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 77 | |
| 78 | WRITE_TWO_ALIGNED_PIXELS(outptr, rgb); |
| 79 | outptr += 4; |
| 80 | } |
| 81 | if (num_cols & 1) { |
| 82 | y = GETJSAMPLE(*inptr0); |
| 83 | cb = GETJSAMPLE(*inptr1); |
| 84 | cr = GETJSAMPLE(*inptr2); |
| 85 | r = range_limit[y + Crrtab[cr]]; |
| 86 | g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 87 | SCALEBITS))]; |
| 88 | b = range_limit[y + Cbbtab[cb]]; |
| 89 | rgb = PACK_SHORT_565(r, g, b); |
| 90 | *(INT16*)outptr = rgb; |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | |
| 96 | INLINE |
| 97 | LOCAL(void) |
| 98 | ycc_rgb565D_convert_internal (j_decompress_ptr cinfo, |
| 99 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 100 | JSAMPARRAY output_buf, int num_rows) |
| 101 | { |
| 102 | my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; |
| 103 | register int y, cb, cr; |
| 104 | register JSAMPROW outptr; |
| 105 | register JSAMPROW inptr0, inptr1, inptr2; |
| 106 | register JDIMENSION col; |
| 107 | JDIMENSION num_cols = cinfo->output_width; |
| 108 | /* copy these pointers into registers if possible */ |
| 109 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 110 | register int * Crrtab = cconvert->Cr_r_tab; |
| 111 | register int * Cbbtab = cconvert->Cb_b_tab; |
| 112 | register INT32 * Crgtab = cconvert->Cr_g_tab; |
| 113 | register INT32 * Cbgtab = cconvert->Cb_g_tab; |
| 114 | INT32 d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK]; |
| 115 | SHIFT_TEMPS |
| 116 | |
| 117 | while (--num_rows >= 0) { |
| 118 | INT32 rgb; |
| 119 | unsigned int r, g, b; |
| 120 | |
| 121 | inptr0 = input_buf[0][input_row]; |
| 122 | inptr1 = input_buf[1][input_row]; |
| 123 | inptr2 = input_buf[2][input_row]; |
| 124 | input_row++; |
| 125 | outptr = *output_buf++; |
| 126 | if (PACK_NEED_ALIGNMENT(outptr)) { |
| 127 | y = GETJSAMPLE(*inptr0++); |
| 128 | cb = GETJSAMPLE(*inptr1++); |
| 129 | cr = GETJSAMPLE(*inptr2++); |
| 130 | r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)]; |
| 131 | g = range_limit[DITHER_565_G(y + |
| 132 | ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 133 | SCALEBITS)), d0)]; |
| 134 | b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)]; |
| 135 | rgb = PACK_SHORT_565(r, g, b); |
| 136 | *(INT16*)outptr = rgb; |
| 137 | outptr += 2; |
| 138 | num_cols--; |
| 139 | } |
| 140 | for (col = 0; col < (num_cols >> 1); col++) { |
| 141 | y = GETJSAMPLE(*inptr0++); |
| 142 | cb = GETJSAMPLE(*inptr1++); |
| 143 | cr = GETJSAMPLE(*inptr2++); |
| 144 | r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)]; |
| 145 | g = range_limit[DITHER_565_G(y + |
| 146 | ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 147 | SCALEBITS)), d0)]; |
| 148 | b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)]; |
| 149 | d0 = DITHER_ROTATE(d0); |
| 150 | rgb = PACK_SHORT_565(r, g, b); |
| 151 | |
| 152 | y = GETJSAMPLE(*inptr0++); |
| 153 | cb = GETJSAMPLE(*inptr1++); |
| 154 | cr = GETJSAMPLE(*inptr2++); |
| 155 | r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)]; |
| 156 | g = range_limit[DITHER_565_G(y + |
| 157 | ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 158 | SCALEBITS)), d0)]; |
| 159 | b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)]; |
| 160 | d0 = DITHER_ROTATE(d0); |
| 161 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 162 | |
| 163 | WRITE_TWO_ALIGNED_PIXELS(outptr, rgb); |
| 164 | outptr += 4; |
| 165 | } |
| 166 | if (num_cols & 1) { |
| 167 | y = GETJSAMPLE(*inptr0); |
| 168 | cb = GETJSAMPLE(*inptr1); |
| 169 | cr = GETJSAMPLE(*inptr2); |
| 170 | r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)]; |
| 171 | g = range_limit[DITHER_565_G(y + |
| 172 | ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], |
| 173 | SCALEBITS)), d0)]; |
| 174 | b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)]; |
| 175 | rgb = PACK_SHORT_565(r, g, b); |
| 176 | *(INT16*)outptr = rgb; |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | |
| 182 | INLINE |
| 183 | LOCAL(void) |
| 184 | rgb_rgb565_convert_internal (j_decompress_ptr cinfo, |
| 185 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 186 | JSAMPARRAY output_buf, int num_rows) |
| 187 | { |
| 188 | register JSAMPROW outptr; |
| 189 | register JSAMPROW inptr0, inptr1, inptr2; |
| 190 | register JDIMENSION col; |
| 191 | JDIMENSION num_cols = cinfo->output_width; |
| 192 | SHIFT_TEMPS |
| 193 | |
| 194 | while (--num_rows >= 0) { |
| 195 | INT32 rgb; |
| 196 | unsigned int r, g, b; |
| 197 | |
| 198 | inptr0 = input_buf[0][input_row]; |
| 199 | inptr1 = input_buf[1][input_row]; |
| 200 | inptr2 = input_buf[2][input_row]; |
| 201 | input_row++; |
| 202 | outptr = *output_buf++; |
| 203 | if (PACK_NEED_ALIGNMENT(outptr)) { |
| 204 | r = GETJSAMPLE(*inptr0++); |
| 205 | g = GETJSAMPLE(*inptr1++); |
| 206 | b = GETJSAMPLE(*inptr2++); |
| 207 | rgb = PACK_SHORT_565(r, g, b); |
| 208 | *(INT16*)outptr = rgb; |
| 209 | outptr += 2; |
| 210 | num_cols--; |
| 211 | } |
| 212 | for (col = 0; col < (num_cols >> 1); col++) { |
| 213 | r = GETJSAMPLE(*inptr0++); |
| 214 | g = GETJSAMPLE(*inptr1++); |
| 215 | b = GETJSAMPLE(*inptr2++); |
| 216 | rgb = PACK_SHORT_565(r, g, b); |
| 217 | |
| 218 | r = GETJSAMPLE(*inptr0++); |
| 219 | g = GETJSAMPLE(*inptr1++); |
| 220 | b = GETJSAMPLE(*inptr2++); |
| 221 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 222 | |
| 223 | WRITE_TWO_ALIGNED_PIXELS(outptr, rgb); |
| 224 | outptr += 4; |
| 225 | } |
| 226 | if (num_cols & 1) { |
| 227 | r = GETJSAMPLE(*inptr0); |
| 228 | g = GETJSAMPLE(*inptr1); |
| 229 | b = GETJSAMPLE(*inptr2); |
| 230 | rgb = PACK_SHORT_565(r, g, b); |
| 231 | *(INT16*)outptr = rgb; |
| 232 | } |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | |
| 237 | INLINE |
| 238 | LOCAL(void) |
| 239 | rgb_rgb565D_convert_internal (j_decompress_ptr cinfo, |
| 240 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 241 | JSAMPARRAY output_buf, int num_rows) |
| 242 | { |
| 243 | register JSAMPROW outptr; |
| 244 | register JSAMPROW inptr0, inptr1, inptr2; |
| 245 | register JDIMENSION col; |
| 246 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 247 | JDIMENSION num_cols = cinfo->output_width; |
| 248 | INT32 d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK]; |
| 249 | SHIFT_TEMPS |
| 250 | |
| 251 | while (--num_rows >= 0) { |
| 252 | INT32 rgb; |
| 253 | unsigned int r, g, b; |
| 254 | |
| 255 | inptr0 = input_buf[0][input_row]; |
| 256 | inptr1 = input_buf[1][input_row]; |
| 257 | inptr2 = input_buf[2][input_row]; |
| 258 | input_row++; |
| 259 | outptr = *output_buf++; |
| 260 | if (PACK_NEED_ALIGNMENT(outptr)) { |
| 261 | r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0++), d0)]; |
| 262 | g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1++), d0)]; |
| 263 | b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2++), d0)]; |
| 264 | rgb = PACK_SHORT_565(r, g, b); |
| 265 | *(INT16*)outptr = rgb; |
| 266 | outptr += 2; |
| 267 | num_cols--; |
| 268 | } |
| 269 | for (col = 0; col < (num_cols >> 1); col++) { |
| 270 | r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0++), d0)]; |
| 271 | g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1++), d0)]; |
| 272 | b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2++), d0)]; |
| 273 | d0 = DITHER_ROTATE(d0); |
| 274 | rgb = PACK_SHORT_565(r, g, b); |
| 275 | |
| 276 | r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0++), d0)]; |
| 277 | g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1++), d0)]; |
| 278 | b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2++), d0)]; |
| 279 | d0 = DITHER_ROTATE(d0); |
| 280 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b)); |
| 281 | |
| 282 | WRITE_TWO_ALIGNED_PIXELS(outptr, rgb); |
| 283 | outptr += 4; |
| 284 | } |
| 285 | if (num_cols & 1) { |
| 286 | r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0), d0)]; |
| 287 | g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1), d0)]; |
| 288 | b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2), d0)]; |
| 289 | rgb = PACK_SHORT_565(r, g, b); |
| 290 | *(INT16*)outptr = rgb; |
| 291 | } |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | |
| 296 | INLINE |
| 297 | LOCAL(void) |
| 298 | gray_rgb565_convert_internal (j_decompress_ptr cinfo, |
| 299 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 300 | JSAMPARRAY output_buf, int num_rows) |
| 301 | { |
| 302 | register JSAMPROW inptr, outptr; |
| 303 | register JDIMENSION col; |
| 304 | JDIMENSION num_cols = cinfo->output_width; |
| 305 | |
| 306 | while (--num_rows >= 0) { |
| 307 | INT32 rgb; |
| 308 | unsigned int g; |
| 309 | |
| 310 | inptr = input_buf[0][input_row++]; |
| 311 | outptr = *output_buf++; |
| 312 | if (PACK_NEED_ALIGNMENT(outptr)) { |
| 313 | g = *inptr++; |
| 314 | rgb = PACK_SHORT_565(g, g, g); |
| 315 | *(INT16*)outptr = rgb; |
| 316 | outptr += 2; |
| 317 | num_cols--; |
| 318 | } |
| 319 | for (col = 0; col < (num_cols >> 1); col++) { |
| 320 | g = *inptr++; |
| 321 | rgb = PACK_SHORT_565(g, g, g); |
| 322 | g = *inptr++; |
| 323 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(g, g, g)); |
| 324 | WRITE_TWO_ALIGNED_PIXELS(outptr, rgb); |
| 325 | outptr += 4; |
| 326 | } |
| 327 | if (num_cols & 1) { |
| 328 | g = *inptr; |
| 329 | rgb = PACK_SHORT_565(g, g, g); |
| 330 | *(INT16*)outptr = rgb; |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | |
| 336 | INLINE |
| 337 | LOCAL(void) |
| 338 | gray_rgb565D_convert_internal (j_decompress_ptr cinfo, |
| 339 | JSAMPIMAGE input_buf, JDIMENSION input_row, |
| 340 | JSAMPARRAY output_buf, int num_rows) |
| 341 | { |
| 342 | register JSAMPROW inptr, outptr; |
| 343 | register JDIMENSION col; |
| 344 | register JSAMPLE * range_limit = cinfo->sample_range_limit; |
| 345 | JDIMENSION num_cols = cinfo->output_width; |
| 346 | INT32 d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK]; |
| 347 | |
| 348 | while (--num_rows >= 0) { |
| 349 | INT32 rgb; |
| 350 | unsigned int g; |
| 351 | |
| 352 | inptr = input_buf[0][input_row++]; |
| 353 | outptr = *output_buf++; |
| 354 | if (PACK_NEED_ALIGNMENT(outptr)) { |
| 355 | g = *inptr++; |
| 356 | g = range_limit[DITHER_565_R(g, d0)]; |
| 357 | rgb = PACK_SHORT_565(g, g, g); |
| 358 | *(INT16*)outptr = rgb; |
| 359 | outptr += 2; |
| 360 | num_cols--; |
| 361 | } |
| 362 | for (col = 0; col < (num_cols >> 1); col++) { |
| 363 | g = *inptr++; |
| 364 | g = range_limit[DITHER_565_R(g, d0)]; |
| 365 | rgb = PACK_SHORT_565(g, g, g); |
| 366 | d0 = DITHER_ROTATE(d0); |
| 367 | |
| 368 | g = *inptr++; |
| 369 | g = range_limit[DITHER_565_R(g, d0)]; |
| 370 | rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(g, g, g)); |
| 371 | d0 = DITHER_ROTATE(d0); |
| 372 | |
| 373 | WRITE_TWO_ALIGNED_PIXELS(outptr, rgb); |
| 374 | outptr += 4; |
| 375 | } |
| 376 | if (num_cols & 1) { |
| 377 | g = *inptr; |
| 378 | g = range_limit[DITHER_565_R(g, d0)]; |
| 379 | rgb = PACK_SHORT_565(g, g, g); |
| 380 | *(INT16*)outptr = rgb; |
| 381 | } |
| 382 | } |
| 383 | } |