J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | |
| 27 | /* |
| 28 | * DESCRIPTION |
| 29 | * Calculates cliping boundary for Affine functions. |
| 30 | * |
| 31 | */ |
| 32 | |
| 33 | #include "mlib_image.h" |
| 34 | #include "mlib_SysMath.h" |
| 35 | #include "mlib_ImageAffine.h" |
| 36 | |
| 37 | /***************************************************************/ |
| 38 | mlib_status mlib_AffineEdges(mlib_affine_param *param, |
| 39 | const mlib_image *dst, |
| 40 | const mlib_image *src, |
| 41 | void *buff_lcl, |
| 42 | mlib_s32 buff_size, |
| 43 | mlib_s32 kw, |
| 44 | mlib_s32 kh, |
| 45 | mlib_s32 kw1, |
| 46 | mlib_s32 kh1, |
| 47 | mlib_edge edge, |
| 48 | const mlib_d64 *mtx, |
| 49 | mlib_s32 shiftx, |
| 50 | mlib_s32 shifty) |
| 51 | { |
| 52 | mlib_u8 *buff = buff_lcl; |
| 53 | mlib_u8 **lineAddr = param->lineAddr; |
| 54 | mlib_s32 srcWidth, dstWidth, srcHeight, dstHeight, srcYStride, dstYStride; |
| 55 | mlib_s32 *leftEdges, *rightEdges, *xStarts, *yStarts, bsize0, bsize1 = 0; |
| 56 | mlib_u8 *srcData, *dstData; |
| 57 | mlib_u8 *paddings; |
| 58 | void *warp_tbl = NULL; |
| 59 | mlib_s32 yStart = 0, yFinish = -1, dX, dY; |
| 60 | |
| 61 | mlib_d64 xClip, yClip, wClip, hClip; |
| 62 | mlib_d64 delta = 0.; |
| 63 | mlib_d64 minX, minY, maxX, maxY; |
| 64 | |
| 65 | mlib_d64 coords[4][2]; |
| 66 | mlib_d64 a = mtx[0], b = mtx[1], tx = mtx[2], c = mtx[3], d = mtx[4], ty = mtx[5]; |
| 67 | mlib_d64 a2, b2, tx2, c2, d2, ty2; |
| 68 | mlib_d64 dx, dy, div; |
| 69 | mlib_s32 sdx, sdy; |
| 70 | mlib_d64 dTop; |
| 71 | mlib_d64 val0; |
| 72 | mlib_s32 top, bot; |
| 73 | mlib_s32 topIdx, max_xsize = 0; |
| 74 | mlib_s32 i, j, t; |
| 75 | |
| 76 | srcData = mlib_ImageGetData(src); |
| 77 | dstData = mlib_ImageGetData(dst); |
| 78 | srcWidth = mlib_ImageGetWidth(src); |
| 79 | srcHeight = mlib_ImageGetHeight(src); |
| 80 | dstWidth = mlib_ImageGetWidth(dst); |
| 81 | dstHeight = mlib_ImageGetHeight(dst); |
| 82 | srcYStride = mlib_ImageGetStride(src); |
| 83 | dstYStride = mlib_ImageGetStride(dst); |
| 84 | paddings = mlib_ImageGetPaddings(src); |
| 85 | |
| 86 | if (srcWidth >= (1 << 15) || srcHeight >= (1 << 15)) { |
| 87 | return MLIB_FAILURE; |
| 88 | } |
| 89 | |
| 90 | div = a * d - b * c; |
| 91 | |
| 92 | if (div == 0.0) { |
| 93 | return MLIB_FAILURE; |
| 94 | } |
| 95 | |
| 96 | bsize0 = (dstHeight * sizeof(mlib_s32) + 7) & ~7; |
| 97 | |
| 98 | if (lineAddr == NULL) { |
| 99 | bsize1 = ((srcHeight + 4 * kh) * sizeof(mlib_u8 *) + 7) & ~7; |
| 100 | } |
| 101 | |
| 102 | param->buff_malloc = NULL; |
| 103 | |
| 104 | if ((4 * bsize0 + bsize1) > buff_size) { |
| 105 | buff = param->buff_malloc = mlib_malloc(4 * bsize0 + bsize1); |
| 106 | |
| 107 | if (buff == NULL) |
| 108 | return MLIB_FAILURE; |
| 109 | } |
| 110 | |
| 111 | leftEdges = (mlib_s32 *) (buff); |
| 112 | rightEdges = (mlib_s32 *) (buff += bsize0); |
| 113 | xStarts = (mlib_s32 *) (buff += bsize0); |
| 114 | yStarts = (mlib_s32 *) (buff += bsize0); |
| 115 | |
| 116 | if (lineAddr == NULL) { |
| 117 | mlib_u8 *srcLinePtr = srcData; |
| 118 | lineAddr = (mlib_u8 **) (buff += bsize0); |
| 119 | for (i = 0; i < 2 * kh; i++) |
| 120 | lineAddr[i] = srcLinePtr; |
| 121 | lineAddr += 2 * kh; |
| 122 | for (i = 0; i < srcHeight - 1; i++) { |
| 123 | lineAddr[i] = srcLinePtr; |
| 124 | srcLinePtr += srcYStride; |
| 125 | } |
| 126 | |
| 127 | for (i = srcHeight - 1; i < srcHeight + 2 * kh; i++) |
| 128 | lineAddr[i] = srcLinePtr; |
| 129 | } |
| 130 | |
| 131 | if ((mlib_s32) edge < 0) { /* process edges */ |
| 132 | minX = 0; |
| 133 | minY = 0; |
| 134 | maxX = srcWidth; |
| 135 | maxY = srcHeight; |
| 136 | } |
| 137 | else { |
| 138 | |
| 139 | if (kw > 1) |
| 140 | delta = -0.5; /* for MLIB_NEAREST filter delta = 0. */ |
| 141 | |
| 142 | minX = (kw1 - delta); |
| 143 | minY = (kh1 - delta); |
| 144 | maxX = srcWidth - ((kw - 1) - (kw1 - delta)); |
| 145 | maxY = srcHeight - ((kh - 1) - (kh1 - delta)); |
| 146 | |
| 147 | if (edge == MLIB_EDGE_SRC_PADDED) { |
| 148 | if (minX < paddings[0]) |
| 149 | minX = paddings[0]; |
| 150 | |
| 151 | if (minY < paddings[1]) |
| 152 | minY = paddings[1]; |
| 153 | |
| 154 | if (maxX > (srcWidth - paddings[2])) |
| 155 | maxX = srcWidth - paddings[2]; |
| 156 | |
| 157 | if (maxY > (srcHeight - paddings[3])) |
| 158 | maxY = srcHeight - paddings[3]; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | xClip = minX; |
| 163 | yClip = minY; |
| 164 | wClip = maxX; |
| 165 | hClip = maxY; |
| 166 | |
| 167 | /* |
| 168 | * STORE_PARAM(param, src); |
| 169 | * STORE_PARAM(param, dst); |
| 170 | */ |
| 171 | param->src = (void *)src; |
| 172 | param->dst = (void *)dst; |
| 173 | STORE_PARAM(param, lineAddr); |
| 174 | STORE_PARAM(param, dstData); |
| 175 | STORE_PARAM(param, srcYStride); |
| 176 | STORE_PARAM(param, dstYStride); |
| 177 | STORE_PARAM(param, leftEdges); |
| 178 | STORE_PARAM(param, rightEdges); |
| 179 | STORE_PARAM(param, xStarts); |
| 180 | STORE_PARAM(param, yStarts); |
| 181 | STORE_PARAM(param, max_xsize); |
| 182 | STORE_PARAM(param, yStart); |
| 183 | STORE_PARAM(param, yFinish); |
| 184 | STORE_PARAM(param, warp_tbl); |
| 185 | |
| 186 | if ((xClip >= wClip) || (yClip >= hClip)) { |
| 187 | return MLIB_SUCCESS; |
| 188 | } |
| 189 | |
| 190 | a2 = d; |
| 191 | b2 = -b; |
| 192 | tx2 = (-d * tx + b * ty); |
| 193 | c2 = -c; |
| 194 | d2 = a; |
| 195 | ty2 = (c * tx - a * ty); |
| 196 | |
| 197 | dx = a2; |
| 198 | dy = c2; |
| 199 | |
| 200 | tx -= 0.5; |
| 201 | ty -= 0.5; |
| 202 | |
| 203 | coords[0][0] = xClip * a + yClip * b + tx; |
| 204 | coords[0][1] = xClip * c + yClip * d + ty; |
| 205 | |
| 206 | coords[2][0] = wClip * a + hClip * b + tx; |
| 207 | coords[2][1] = wClip * c + hClip * d + ty; |
| 208 | |
| 209 | if (div > 0) { |
| 210 | coords[1][0] = wClip * a + yClip * b + tx; |
| 211 | coords[1][1] = wClip * c + yClip * d + ty; |
| 212 | |
| 213 | coords[3][0] = xClip * a + hClip * b + tx; |
| 214 | coords[3][1] = xClip * c + hClip * d + ty; |
| 215 | } |
| 216 | else { |
| 217 | coords[3][0] = wClip * a + yClip * b + tx; |
| 218 | coords[3][1] = wClip * c + yClip * d + ty; |
| 219 | |
| 220 | coords[1][0] = xClip * a + hClip * b + tx; |
| 221 | coords[1][1] = xClip * c + hClip * d + ty; |
| 222 | } |
| 223 | |
| 224 | topIdx = 0; |
| 225 | for (i = 1; i < 4; i++) { |
| 226 | |
| 227 | if (coords[i][1] < coords[topIdx][1]) |
| 228 | topIdx = i; |
| 229 | } |
| 230 | |
| 231 | dTop = coords[topIdx][1]; |
| 232 | val0 = dTop; |
| 233 | SAT32(top); |
| 234 | bot = -1; |
| 235 | |
| 236 | if (top >= dstHeight) { |
| 237 | return MLIB_SUCCESS; |
| 238 | } |
| 239 | |
| 240 | if (dTop >= 0.0) { |
| 241 | mlib_d64 xLeft, xRight, x; |
| 242 | mlib_s32 nextIdx; |
| 243 | |
| 244 | if (dTop == top) { |
| 245 | xLeft = coords[topIdx][0]; |
| 246 | xRight = coords[topIdx][0]; |
| 247 | nextIdx = (topIdx + 1) & 0x3; |
| 248 | |
| 249 | if (dTop == coords[nextIdx][1]) { |
| 250 | x = coords[nextIdx][0]; |
| 251 | xLeft = (xLeft <= x) ? xLeft : x; |
| 252 | xRight = (xRight >= x) ? xRight : x; |
| 253 | } |
| 254 | |
| 255 | nextIdx = (topIdx - 1) & 0x3; |
| 256 | |
| 257 | if (dTop == coords[nextIdx][1]) { |
| 258 | x = coords[nextIdx][0]; |
| 259 | xLeft = (xLeft <= x) ? xLeft : x; |
| 260 | xRight = (xRight >= x) ? xRight : x; |
| 261 | } |
| 262 | |
| 263 | val0 = xLeft; |
| 264 | SAT32(t); |
| 265 | leftEdges[top] = (t >= xLeft) ? t : ++t; |
| 266 | |
| 267 | if (xLeft >= MLIB_S32_MAX) |
| 268 | leftEdges[top] = MLIB_S32_MAX; |
| 269 | |
| 270 | val0 = xRight; |
| 271 | SAT32(rightEdges[top]); |
| 272 | } |
| 273 | else |
| 274 | top++; |
| 275 | } |
| 276 | else |
| 277 | top = 0; |
| 278 | |
| 279 | for (i = 0; i < 2; i++) { |
| 280 | mlib_d64 dY1 = coords[(topIdx - i) & 0x3][1]; |
| 281 | mlib_d64 dX1 = coords[(topIdx - i) & 0x3][0]; |
| 282 | mlib_d64 dY2 = coords[(topIdx - i - 1) & 0x3][1]; |
| 283 | mlib_d64 dX2 = coords[(topIdx - i - 1) & 0x3][0]; |
| 284 | mlib_d64 x = dX1, slope = (dX2 - dX1) / (dY2 - dY1); |
| 285 | mlib_s32 y1; |
| 286 | mlib_s32 y2; |
| 287 | |
| 288 | if (dY1 == dY2) |
| 289 | continue; |
| 290 | |
| 291 | if (dY1 < 0.0) |
| 292 | y1 = 0; |
| 293 | else { |
| 294 | val0 = dY1 + 1; |
| 295 | SAT32(y1); |
| 296 | } |
| 297 | |
| 298 | val0 = dY2; |
| 299 | SAT32(y2); |
| 300 | |
| 301 | if (y2 >= dstHeight) |
| 302 | y2 = (mlib_s32) (dstHeight - 1); |
| 303 | |
| 304 | x += slope * (y1 - dY1); |
| 305 | #ifdef __SUNPRO_C |
| 306 | #pragma pipeloop(0) |
| 307 | #endif /* __SUNPRO_C */ |
| 308 | for (j = y1; j <= y2; j++) { |
| 309 | val0 = x; |
| 310 | SAT32(t); |
| 311 | leftEdges[j] = (t >= x) ? t : ++t; |
| 312 | |
| 313 | if (x >= MLIB_S32_MAX) |
| 314 | leftEdges[j] = MLIB_S32_MAX; |
| 315 | x += slope; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | for (i = 0; i < 2; i++) { |
| 320 | mlib_d64 dY1 = coords[(topIdx + i) & 0x3][1]; |
| 321 | mlib_d64 dX1 = coords[(topIdx + i) & 0x3][0]; |
| 322 | mlib_d64 dY2 = coords[(topIdx + i + 1) & 0x3][1]; |
| 323 | mlib_d64 dX2 = coords[(topIdx + i + 1) & 0x3][0]; |
| 324 | mlib_d64 x = dX1, slope = (dX2 - dX1) / (dY2 - dY1); |
| 325 | mlib_s32 y1; |
| 326 | mlib_s32 y2; |
| 327 | |
| 328 | if (dY1 == dY2) |
| 329 | continue; |
| 330 | |
| 331 | if (dY1 < 0.0) |
| 332 | y1 = 0; |
| 333 | else { |
| 334 | val0 = dY1 + 1; |
| 335 | SAT32(y1); |
| 336 | } |
| 337 | |
| 338 | val0 = dY2; |
| 339 | SAT32(y2); |
| 340 | |
| 341 | if (y2 >= dstHeight) |
| 342 | y2 = (mlib_s32) (dstHeight - 1); |
| 343 | |
| 344 | x += slope * (y1 - dY1); |
| 345 | #ifdef __SUNPRO_C |
| 346 | #pragma pipeloop(0) |
| 347 | #endif /* __SUNPRO_C */ |
| 348 | for (j = y1; j <= y2; j++) { |
| 349 | val0 = x; |
| 350 | SAT32(rightEdges[j]); |
| 351 | x += slope; |
| 352 | } |
| 353 | |
| 354 | bot = y2; |
| 355 | } |
| 356 | |
| 357 | { |
| 358 | mlib_d64 dxCl = xClip * div; |
| 359 | mlib_d64 dyCl = yClip * div; |
| 360 | mlib_d64 dwCl = wClip * div; |
| 361 | mlib_d64 dhCl = hClip * div; |
| 362 | |
| 363 | mlib_s32 xCl = (mlib_s32) (xClip + delta); |
| 364 | mlib_s32 yCl = (mlib_s32) (yClip + delta); |
| 365 | mlib_s32 wCl = (mlib_s32) (wClip + delta); |
| 366 | mlib_s32 hCl = (mlib_s32) (hClip + delta); |
| 367 | |
| 368 | /* |
| 369 | * mlib_s32 xCl = (mlib_s32)(xClip + delta); |
| 370 | * mlib_s32 yCl = (mlib_s32)(yClip + delta); |
| 371 | * mlib_s32 wCl = (mlib_s32)(wClip); |
| 372 | * mlib_s32 hCl = (mlib_s32)(hClip); |
| 373 | */ |
| 374 | |
| 375 | if (edge == MLIB_EDGE_SRC_PADDED) { |
| 376 | xCl = kw1; |
| 377 | yCl = kh1; |
| 378 | wCl = (mlib_s32) (srcWidth - ((kw - 1) - kw1)); |
| 379 | hCl = (mlib_s32) (srcHeight - ((kh - 1) - kh1)); |
| 380 | } |
| 381 | |
| 382 | div = 1.0 / div; |
| 383 | |
| 384 | sdx = (mlib_s32) (a2 * div * (1 << shiftx)); |
| 385 | sdy = (mlib_s32) (c2 * div * (1 << shifty)); |
| 386 | |
| 387 | if (div > 0) { |
| 388 | |
| 389 | #ifdef __SUNPRO_C |
| 390 | #pragma pipeloop(0) |
| 391 | #endif /* __SUNPRO_C */ |
| 392 | for (i = top; i <= bot; i++) { |
| 393 | mlib_s32 xLeft = leftEdges[i]; |
| 394 | mlib_s32 xRight = rightEdges[i]; |
| 395 | mlib_s32 xs, ys, x_e, y_e, x_s, y_s; |
| 396 | mlib_d64 dxs, dys, dxe, dye; |
| 397 | mlib_d64 xl, ii, xr; |
| 398 | |
| 399 | xLeft = (xLeft < 0) ? 0 : xLeft; |
| 400 | xRight = (xRight >= dstWidth) ? (mlib_s32) (dstWidth - 1) : xRight; |
| 401 | |
| 402 | xl = xLeft + 0.5; |
| 403 | ii = i + 0.5; |
| 404 | xr = xRight + 0.5; |
| 405 | dxs = xl * a2 + ii * b2 + tx2; |
| 406 | dys = xl * c2 + ii * d2 + ty2; |
| 407 | |
| 408 | if ((dxs < dxCl) || (dxs >= dwCl) || (dys < dyCl) || (dys >= dhCl)) { |
| 409 | dxs += dx; |
| 410 | dys += dy; |
| 411 | xLeft++; |
| 412 | |
| 413 | if ((dxs < dxCl) || (dxs >= dwCl) || (dys < dyCl) || (dys >= dhCl)) |
| 414 | xRight = -1; |
| 415 | } |
| 416 | |
| 417 | dxe = xr * a2 + ii * b2 + tx2; |
| 418 | dye = xr * c2 + ii * d2 + ty2; |
| 419 | |
| 420 | if ((dxe < dxCl) || (dxe >= dwCl) || (dye < dyCl) || (dye >= dhCl)) { |
| 421 | dxe -= dx; |
| 422 | dye -= dy; |
| 423 | xRight--; |
| 424 | |
| 425 | if ((dxe < dxCl) || (dxe >= dwCl) || (dye < dyCl) || (dye >= dhCl)) |
| 426 | xRight = -1; |
| 427 | } |
| 428 | |
| 429 | xs = (mlib_s32) ((dxs * div + delta) * (1 << shiftx)); |
| 430 | x_s = xs >> shiftx; |
| 431 | |
| 432 | ys = (mlib_s32) ((dys * div + delta) * (1 << shifty)); |
| 433 | y_s = ys >> shifty; |
| 434 | |
| 435 | if (x_s < xCl) |
| 436 | xs = (xCl << shiftx); |
| 437 | else if (x_s >= wCl) |
| 438 | xs = ((wCl << shiftx) - 1); |
| 439 | |
| 440 | if (y_s < yCl) |
| 441 | ys = (yCl << shifty); |
| 442 | else if (y_s >= hCl) |
| 443 | ys = ((hCl << shifty) - 1); |
| 444 | |
| 445 | if (xRight >= xLeft) { |
| 446 | x_e = ((xRight - xLeft) * sdx + xs) >> shiftx; |
| 447 | y_e = ((xRight - xLeft) * sdy + ys) >> shifty; |
| 448 | |
| 449 | if ((x_e < xCl) || (x_e >= wCl)) { |
| 450 | if (sdx > 0) |
| 451 | sdx -= 1; |
| 452 | else |
| 453 | sdx += 1; |
| 454 | } |
| 455 | |
| 456 | if ((y_e < yCl) || (y_e >= hCl)) { |
| 457 | if (sdy > 0) |
| 458 | sdy -= 1; |
| 459 | else |
| 460 | sdy += 1; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | leftEdges[i] = xLeft; |
| 465 | rightEdges[i] = xRight; |
| 466 | xStarts[i] = xs; |
| 467 | yStarts[i] = ys; |
| 468 | |
| 469 | if ((xRight - xLeft + 1) > max_xsize) |
| 470 | max_xsize = (xRight - xLeft + 1); |
| 471 | } |
| 472 | } |
| 473 | else { |
| 474 | |
| 475 | #ifdef __SUNPRO_C |
| 476 | #pragma pipeloop(0) |
| 477 | #endif /* __SUNPRO_C */ |
| 478 | for (i = top; i <= bot; i++) { |
| 479 | mlib_s32 xLeft = leftEdges[i]; |
| 480 | mlib_s32 xRight = rightEdges[i]; |
| 481 | mlib_s32 xs, ys, x_e, y_e, x_s, y_s; |
| 482 | mlib_d64 dxs, dys, dxe, dye; |
| 483 | mlib_d64 xl, ii, xr; |
| 484 | |
| 485 | xLeft = (xLeft < 0) ? 0 : xLeft; |
| 486 | xRight = (xRight >= dstWidth) ? (mlib_s32) (dstWidth - 1) : xRight; |
| 487 | |
| 488 | xl = xLeft + 0.5; |
| 489 | ii = i + 0.5; |
| 490 | xr = xRight + 0.5; |
| 491 | dxs = xl * a2 + ii * b2 + tx2; |
| 492 | dys = xl * c2 + ii * d2 + ty2; |
| 493 | |
| 494 | if ((dxs > dxCl) || (dxs <= dwCl) || (dys > dyCl) || (dys <= dhCl)) { |
| 495 | dxs += dx; |
| 496 | dys += dy; |
| 497 | xLeft++; |
| 498 | |
| 499 | if ((dxs > dxCl) || (dxs <= dwCl) || (dys > dyCl) || (dys <= dhCl)) |
| 500 | xRight = -1; |
| 501 | } |
| 502 | |
| 503 | dxe = xr * a2 + ii * b2 + tx2; |
| 504 | dye = xr * c2 + ii * d2 + ty2; |
| 505 | |
| 506 | if ((dxe > dxCl) || (dxe <= dwCl) || (dye > dyCl) || (dye <= dhCl)) { |
| 507 | dxe -= dx; |
| 508 | dye -= dy; |
| 509 | xRight--; |
| 510 | |
| 511 | if ((dxe > dxCl) || (dxe <= dwCl) || (dye > dyCl) || (dye <= dhCl)) |
| 512 | xRight = -1; |
| 513 | } |
| 514 | |
| 515 | xs = (mlib_s32) ((dxs * div + delta) * (1 << shiftx)); |
| 516 | x_s = xs >> shiftx; |
| 517 | |
| 518 | if (x_s < xCl) |
| 519 | xs = (xCl << shiftx); |
| 520 | else if (x_s >= wCl) |
| 521 | xs = ((wCl << shiftx) - 1); |
| 522 | |
| 523 | ys = (mlib_s32) ((dys * div + delta) * (1 << shifty)); |
| 524 | y_s = ys >> shifty; |
| 525 | |
| 526 | if (y_s < yCl) |
| 527 | ys = (yCl << shifty); |
| 528 | else if (y_s >= hCl) |
| 529 | ys = ((hCl << shifty) - 1); |
| 530 | |
| 531 | if (xRight >= xLeft) { |
| 532 | x_e = ((xRight - xLeft) * sdx + xs) >> shiftx; |
| 533 | y_e = ((xRight - xLeft) * sdy + ys) >> shifty; |
| 534 | |
| 535 | if ((x_e < xCl) || (x_e >= wCl)) { |
| 536 | if (sdx > 0) |
| 537 | sdx -= 1; |
| 538 | else |
| 539 | sdx += 1; |
| 540 | } |
| 541 | |
| 542 | if ((y_e < yCl) || (y_e >= hCl)) { |
| 543 | if (sdy > 0) |
| 544 | sdy -= 1; |
| 545 | else |
| 546 | sdy += 1; |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | leftEdges[i] = xLeft; |
| 551 | rightEdges[i] = xRight; |
| 552 | xStarts[i] = xs; |
| 553 | yStarts[i] = ys; |
| 554 | |
| 555 | if ((xRight - xLeft + 1) > max_xsize) |
| 556 | max_xsize = (xRight - xLeft + 1); |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | while (leftEdges[top] > rightEdges[top] && top <= bot) |
| 562 | top++; |
| 563 | |
| 564 | if (top < bot) |
| 565 | while (leftEdges[bot] > rightEdges[bot]) |
| 566 | bot--; |
| 567 | |
| 568 | yStart = top; |
| 569 | yFinish = bot; |
| 570 | dX = sdx; |
| 571 | dY = sdy; |
| 572 | |
| 573 | dstData += (yStart - 1) * dstYStride; |
| 574 | |
| 575 | STORE_PARAM(param, dstData); |
| 576 | STORE_PARAM(param, yStart); |
| 577 | STORE_PARAM(param, yFinish); |
| 578 | STORE_PARAM(param, max_xsize); |
| 579 | STORE_PARAM(param, dX); |
| 580 | STORE_PARAM(param, dY); |
| 581 | |
| 582 | return MLIB_SUCCESS; |
| 583 | } |
| 584 | |
| 585 | /***************************************************************/ |