| 1 | /* |
| 2 | * Texture Filtering |
| 3 | * Version: 1.0 |
| 4 | * |
| 5 | * Copyright (C) 2007 Hiroshi Morii All Rights Reserved. |
| 6 | * Email koolsmoky(at)users.sourceforge.net |
| 7 | * Web http://www.3dfxzone.it/koolsmoky |
| 8 | * |
| 9 | * this is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2, or (at your option) |
| 12 | * any later version. |
| 13 | * |
| 14 | * this is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with GNU Make; see the file COPYING. If not, write to |
| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | */ |
| 23 | |
| 24 | #include "TxUtil.h" |
| 25 | #include "TxDbg.h" |
| 26 | #include <zlib.h> |
| 27 | #include <stdlib.h> |
| 28 | #ifdef _WIN32 |
| 29 | #define WIN32_LEAN_AND_MEAN |
| 30 | #include <windows.h> |
| 31 | #else |
| 32 | #include <unistd.h> |
| 33 | #endif |
| 34 | |
| 35 | /* |
| 36 | * External libraries |
| 37 | ******************************************************************************/ |
| 38 | TxLoadLib::TxLoadLib() |
| 39 | { |
| 40 | #ifdef DXTN_DLL |
| 41 | if (!_dxtnlib) |
| 42 | _dxtnlib = LoadLibrary("dxtn"); |
| 43 | |
| 44 | if (_dxtnlib) { |
| 45 | if (!_tx_compress_dxtn_rgba) |
| 46 | _tx_compress_dxtn_rgba = (dxtCompressTexFuncExt)DLSYM(_dxtnlib, "tx_compress_dxtn_rgba"); |
| 47 | |
| 48 | if (!_tx_compress_fxt1) |
| 49 | _tx_compress_fxt1 = (fxtCompressTexFuncExt)DLSYM(_dxtnlib, "fxt1_encode"); |
| 50 | } |
| 51 | #else |
| 52 | _tx_compress_dxtn_rgba = tx_compress_dxtn_rgba; |
| 53 | _tx_compress_fxt1 = fxt1_encode; |
| 54 | |
| 55 | #endif |
| 56 | } |
| 57 | |
| 58 | TxLoadLib::~TxLoadLib() |
| 59 | { |
| 60 | #ifdef DXTN_DLL |
| 61 | /* free dynamic library */ |
| 62 | if (_dxtnlib) |
| 63 | FreeLibrary(_dxtnlib); |
| 64 | #endif |
| 65 | |
| 66 | } |
| 67 | |
| 68 | fxtCompressTexFuncExt |
| 69 | TxLoadLib::getfxtCompressTexFuncExt() |
| 70 | { |
| 71 | return _tx_compress_fxt1; |
| 72 | } |
| 73 | |
| 74 | dxtCompressTexFuncExt |
| 75 | TxLoadLib::getdxtCompressTexFuncExt() |
| 76 | { |
| 77 | return _tx_compress_dxtn_rgba; |
| 78 | } |
| 79 | |
| 80 | |
| 81 | /* |
| 82 | * Utilities |
| 83 | ******************************************************************************/ |
| 84 | uint32 |
| 85 | TxUtil::checksumTx(uint8 *src, int width, int height, uint16 format) |
| 86 | { |
| 87 | int dataSize = sizeofTx(width, height, format); |
| 88 | |
| 89 | /* for now we use adler32 if something else is better |
| 90 | * we can simply swtich later |
| 91 | */ |
| 92 | /* return (dataSize ? Adler32(src, dataSize, 1) : 0); */ |
| 93 | |
| 94 | /* zlib crc32 */ |
| 95 | return (dataSize ? crc32(crc32(0L, Z_NULL, 0), src, dataSize) : 0); |
| 96 | } |
| 97 | |
| 98 | int |
| 99 | TxUtil::sizeofTx(int width, int height, uint16 format) |
| 100 | { |
| 101 | int dataSize = 0; |
| 102 | |
| 103 | /* a lookup table for the shifts would be better */ |
| 104 | switch (format) { |
| 105 | case GR_TEXFMT_ARGB_CMP_FXT1: |
| 106 | dataSize = (((width + 0x7) & ~0x7) * ((height + 0x3) & ~0x3)) >> 1; |
| 107 | break; |
| 108 | case GR_TEXFMT_ARGB_CMP_DXT1: |
| 109 | dataSize = (((width + 0x3) & ~0x3) * ((height + 0x3) & ~0x3)) >> 1; |
| 110 | break; |
| 111 | case GR_TEXFMT_ARGB_CMP_DXT3: |
| 112 | case GR_TEXFMT_ARGB_CMP_DXT5: |
| 113 | dataSize = ((width + 0x3) & ~0x3) * ((height + 0x3) & ~0x3); |
| 114 | break; |
| 115 | case GR_TEXFMT_ALPHA_INTENSITY_44: |
| 116 | case GR_TEXFMT_ALPHA_8: |
| 117 | case GR_TEXFMT_INTENSITY_8: |
| 118 | case GR_TEXFMT_P_8: |
| 119 | dataSize = width * height; |
| 120 | break; |
| 121 | case GR_TEXFMT_ARGB_4444: |
| 122 | case GR_TEXFMT_ARGB_1555: |
| 123 | case GR_TEXFMT_RGB_565: |
| 124 | case GR_TEXFMT_ALPHA_INTENSITY_88: |
| 125 | dataSize = (width * height) << 1; |
| 126 | break; |
| 127 | case GR_TEXFMT_ARGB_8888: |
| 128 | dataSize = (width * height) << 2; |
| 129 | break; |
| 130 | default: |
| 131 | /* unsupported format */ |
| 132 | DBG_INFO(80, L"Error: cannot get size. unsupported gfmt:%x\n", format); |
| 133 | ; |
| 134 | } |
| 135 | |
| 136 | return dataSize; |
| 137 | } |
| 138 | |
| 139 | #if 0 /* unused */ |
| 140 | uint32 |
| 141 | TxUtil::chkAlpha(uint32* src, int width, int height) |
| 142 | { |
| 143 | /* NOTE: _src must be ARGB8888 |
| 144 | * return values |
| 145 | * 0x00000000: 8bit alpha |
| 146 | * 0x00000001: 1bit alpha |
| 147 | * 0xff000001: no alpha |
| 148 | */ |
| 149 | |
| 150 | int _size = width * height; |
| 151 | uint32 alpha = 0; |
| 152 | |
| 153 | __asm { |
| 154 | mov esi, dword ptr [src]; |
| 155 | mov ecx, dword ptr [_size]; |
| 156 | mov ebx, 0xff000000; |
| 157 | |
| 158 | tc1_loop: |
| 159 | mov eax, dword ptr [esi]; |
| 160 | add esi, 4; |
| 161 | |
| 162 | and eax, 0xff000000; |
| 163 | jz alpha1bit; |
| 164 | cmp eax, 0xff000000; |
| 165 | je alpha1bit; |
| 166 | jmp done; |
| 167 | |
| 168 | alpha1bit: |
| 169 | and ebx, eax; |
| 170 | dec ecx; |
| 171 | jnz tc1_loop; |
| 172 | |
| 173 | or ebx, 0x00000001; |
| 174 | mov dword ptr [alpha], ebx; |
| 175 | |
| 176 | done: |
| 177 | } |
| 178 | |
| 179 | return alpha; |
| 180 | } |
| 181 | #endif |
| 182 | |
| 183 | uint32 |
| 184 | TxUtil::checksum(uint8 *src, int width, int height, int size, int rowStride) |
| 185 | { |
| 186 | /* Rice CRC32 for now. We can switch this to Jabo MD5 or |
| 187 | * any other custom checksum. |
| 188 | * TODO: use *_HIRESTEXTURE option. */ |
| 189 | |
| 190 | if (!src) return 0; |
| 191 | |
| 192 | return RiceCRC32(src, width, height, size, rowStride); |
| 193 | } |
| 194 | |
| 195 | uint64 |
| 196 | TxUtil::checksum64(uint8 *src, int width, int height, int size, int rowStride, uint8 *palette) |
| 197 | { |
| 198 | /* Rice CRC32 for now. We can switch this to Jabo MD5 or |
| 199 | * any other custom checksum. |
| 200 | * TODO: use *_HIRESTEXTURE option. */ |
| 201 | /* Returned value is 64bits: hi=palette crc32 low=texture crc32 */ |
| 202 | |
| 203 | if (!src) return 0; |
| 204 | |
| 205 | uint64 crc64Ret = 0; |
| 206 | |
| 207 | if (palette) { |
| 208 | uint32 crc32 = 0, cimax = 0; |
| 209 | switch (size & 0xff) { |
| 210 | case 1: |
| 211 | if (RiceCRC32_CI8(src, width, height, size, rowStride, &crc32, &cimax)) { |
| 212 | crc64Ret = (uint64)RiceCRC32(palette, cimax + 1, 1, 2, 512); |
| 213 | crc64Ret <<= 32; |
| 214 | crc64Ret |= (uint64)crc32; |
| 215 | } |
| 216 | break; |
| 217 | case 0: |
| 218 | if (RiceCRC32_CI4(src, width, height, size, rowStride, &crc32, &cimax)) { |
| 219 | crc64Ret = (uint64)RiceCRC32(palette, cimax + 1, 1, 2, 32); |
| 220 | crc64Ret <<= 32; |
| 221 | crc64Ret |= (uint64)crc32; |
| 222 | } |
| 223 | } |
| 224 | } |
| 225 | if (!crc64Ret) { |
| 226 | crc64Ret = (uint64)RiceCRC32(src, width, height, size, rowStride); |
| 227 | } |
| 228 | |
| 229 | return crc64Ret; |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | ** Computes Adler32 checksum for a stream of data. |
| 234 | ** |
| 235 | ** From the specification found in RFC 1950: (ZLIB Compressed Data Format |
| 236 | ** Specification version 3.3) |
| 237 | ** |
| 238 | ** ADLER32 (Adler-32 checksum) This contains a checksum value of the |
| 239 | ** uncompressed data (excluding any dictionary data) computed according to |
| 240 | ** Adler-32 algorithm. This algorithm is a 32-bit extension and improvement |
| 241 | ** of the Fletcher algorithm, used in the ITU-T X.224 / ISO 8073 standard. |
| 242 | ** |
| 243 | ** Adler-32 is composed of two sums accumulated per byte: s1 is the sum of |
| 244 | ** all bytes, s2 is the sum of all s1 values. Both sums are done modulo |
| 245 | ** 65521. s1 is initialized to 1, s2 to zero. The Adler-32 checksum is stored |
| 246 | ** as s2*65536 + s1 in most-significant-byte first (network) order. |
| 247 | ** |
| 248 | ** 8.2. The Adler-32 algorithm |
| 249 | ** |
| 250 | ** The Adler-32 algorithm is much faster than the CRC32 algorithm yet still |
| 251 | ** provides an extremely low probability of undetected errors. |
| 252 | ** |
| 253 | ** The modulo on unsigned long accumulators can be delayed for 5552 bytes, |
| 254 | ** so the modulo operation time is negligible. If the bytes are a, b, c, |
| 255 | ** the second sum is 3a + 2b + c + 3, and so is position and order sensitive, |
| 256 | ** unlike the first sum, which is just a checksum. That 65521 is prime is |
| 257 | ** important to avoid a possible large class of two-byte errors that leave |
| 258 | ** the check unchanged. (The Fletcher checksum uses 255, which is not prime |
| 259 | ** and which also makes the Fletcher check insensitive to single byte |
| 260 | ** changes 0 <-> 255.) |
| 261 | ** |
| 262 | ** The sum s1 is initialized to 1 instead of zero to make the length of |
| 263 | ** the sequence part of s2, so that the length does not have to be checked |
| 264 | ** separately. (Any sequence of zeroes has a Fletcher checksum of zero.) |
| 265 | */ |
| 266 | |
| 267 | uint32 |
| 268 | TxUtil::Adler32(const uint8* data, int Len, uint32 dwAdler32) |
| 269 | { |
| 270 | #if 1 |
| 271 | /* zlib adler32 */ |
| 272 | return adler32(dwAdler32, data, Len); |
| 273 | #else |
| 274 | register uint32 s1 = dwAdler32 & 0xFFFF; |
| 275 | register uint32 s2 = (dwAdler32 >> 16) & 0xFFFF; |
| 276 | int k; |
| 277 | |
| 278 | while (Len > 0) { |
| 279 | /* 5552 is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */ |
| 280 | k = (Len < 5552 ? Len : 5552); |
| 281 | Len -= k; |
| 282 | while (k--) { |
| 283 | s1 += *data++; |
| 284 | s2 += s1; |
| 285 | } |
| 286 | /* 65521 is the largest prime smaller than 65536 */ |
| 287 | s1 %= 65521; |
| 288 | s2 %= 65521; |
| 289 | } |
| 290 | |
| 291 | return (s2 << 16) | s1; |
| 292 | #endif |
| 293 | } |
| 294 | |
| 295 | uint32 |
| 296 | TxUtil::Adler32(const uint8* src, int width, int height, int size, int rowStride) |
| 297 | { |
| 298 | int i; |
| 299 | uint32 ret = 1; |
| 300 | uint32 width_in_bytes = width * size; |
| 301 | |
| 302 | for (i = 0; i < height; i++) { |
| 303 | ret = Adler32(src, width_in_bytes, ret); |
| 304 | src += rowStride; |
| 305 | } |
| 306 | |
| 307 | return ret; |
| 308 | } |
| 309 | |
| 310 | // rotate left |
| 311 | template<class T> static T __ROL__(T value, unsigned int count) |
| 312 | { |
| 313 | const unsigned int nbits = sizeof(T) * 8; |
| 314 | count %= nbits; |
| 315 | |
| 316 | T high = value >> (nbits - count); |
| 317 | value <<= count; |
| 318 | value |= high; |
| 319 | return value; |
| 320 | } |
| 321 | |
| 322 | /* Rice CRC32 for hires texture packs */ |
| 323 | /* NOTE: The following is used in Glide64 to calculate the CRC32 |
| 324 | * for Rice hires texture packs. |
| 325 | * |
| 326 | * BYTE* addr = (BYTE*)(gfx.RDRAM + |
| 327 | * rdp.addr[rdp.tiles[tile].t_mem] + |
| 328 | * (rdp.tiles[tile].ul_t * bpl) + |
| 329 | * (((rdp.tiles[tile].ul_s<<rdp.tiles[tile].size)+1)>>1)); |
| 330 | * RiceCRC32(addr, |
| 331 | * rdp.tiles[tile].width, |
| 332 | * rdp.tiles[tile].height, |
| 333 | * (unsigned short)(rdp.tiles[tile].format << 8 | rdp.tiles[tile].size), |
| 334 | * bpl); |
| 335 | */ |
| 336 | uint32 |
| 337 | TxUtil::RiceCRC32(const uint8* src, int width, int height, int size, int rowStride) |
| 338 | { |
| 339 | const uint8_t *row; |
| 340 | uint32_t crc32Ret; |
| 341 | int cur_height; |
| 342 | uint32_t pos; |
| 343 | uint32_t word; |
| 344 | uint32_t word_hash = 0; |
| 345 | uint32_t tmp; |
| 346 | const uint32_t bytes_per_width = ((width << size) + 1) >> 1; |
| 347 | |
| 348 | row = src; |
| 349 | crc32Ret = 0; |
| 350 | |
| 351 | for (cur_height = height - 1; cur_height >= 0; cur_height--) { |
| 352 | for (pos = bytes_per_width - 4; pos < 0x80000000u; pos -= 4) { |
| 353 | word = *(uint32_t *)&row[pos]; |
| 354 | word_hash = pos ^ word; |
| 355 | tmp = __ROL__(crc32Ret, 4); |
| 356 | crc32Ret = word_hash + tmp; |
| 357 | } |
| 358 | crc32Ret += cur_height ^ word_hash; |
| 359 | row += rowStride; |
| 360 | } |
| 361 | return crc32Ret; |
| 362 | } |
| 363 | |
| 364 | boolean |
| 365 | TxUtil::RiceCRC32_CI4(const uint8* src, int width, int height, int size, int rowStride, |
| 366 | uint32* crc32, uint32* cimax) |
| 367 | { |
| 368 | const uint8_t *row; |
| 369 | uint32_t crc32Ret; |
| 370 | uint32_t cimaxRet; |
| 371 | int cur_height; |
| 372 | uint32_t pos; |
| 373 | uint32_t word; |
| 374 | uint32_t word_hash = 0; |
| 375 | uint32_t tmp; |
| 376 | const uint32_t bytes_per_width = ((width << size) + 1) >> 1; |
| 377 | |
| 378 | row = src; |
| 379 | crc32Ret = 0; |
| 380 | cimaxRet = 0; |
| 381 | |
| 382 | for (cur_height = height - 1; cur_height >= 0; cur_height--) { |
| 383 | for (pos = bytes_per_width - 4; pos < 0x80000000u; pos -= 4) { |
| 384 | word = *(uint32_t *)&row[pos]; |
| 385 | if (cimaxRet != 15) { |
| 386 | if ((word & 0xF) >= cimaxRet) |
| 387 | cimaxRet = word & 0xF; |
| 388 | if ((uint32_t)((uint8_t)word >> 4) >= cimaxRet) |
| 389 | cimaxRet = (uint8_t)word >> 4; |
| 390 | if (((word >> 8) & 0xF) >= cimaxRet) |
| 391 | cimaxRet = (word >> 8) & 0xF; |
| 392 | if ((uint32_t)((uint16_t)word >> 12) >= cimaxRet) |
| 393 | cimaxRet = (uint16_t)word >> 12; |
| 394 | if (((word >> 16) & 0xF) >= cimaxRet) |
| 395 | cimaxRet = (word >> 16) & 0xF; |
| 396 | if (((word >> 20) & 0xF) >= cimaxRet) |
| 397 | cimaxRet = (word >> 20) & 0xF; |
| 398 | if (((word >> 24) & 0xF) >= cimaxRet) |
| 399 | cimaxRet = (word >> 24) & 0xF; |
| 400 | if (word >> 28 >= cimaxRet ) |
| 401 | cimaxRet = word >> 28; |
| 402 | } |
| 403 | word_hash = pos ^ word; |
| 404 | tmp = __ROL__(crc32Ret, 4); |
| 405 | crc32Ret = word_hash + tmp; |
| 406 | } |
| 407 | crc32Ret += cur_height ^ word_hash; |
| 408 | row += rowStride; |
| 409 | } |
| 410 | *crc32 = crc32Ret; |
| 411 | *cimax = cimaxRet; |
| 412 | return 1; |
| 413 | } |
| 414 | |
| 415 | boolean |
| 416 | TxUtil::RiceCRC32_CI8(const uint8* src, int width, int height, int size, int rowStride, |
| 417 | uint32* crc32, uint32* cimax) |
| 418 | { |
| 419 | const uint8_t *row; |
| 420 | uint32_t crc32Ret; |
| 421 | uint32_t cimaxRet; |
| 422 | int cur_height; |
| 423 | uint32_t pos; |
| 424 | uint32_t word; |
| 425 | uint32_t word_hash = 0; |
| 426 | uint32_t tmp; |
| 427 | const uint32_t bytes_per_width = ((width << size) + 1) >> 1; |
| 428 | |
| 429 | row = src; |
| 430 | crc32Ret = 0; |
| 431 | cimaxRet = 0; |
| 432 | |
| 433 | for (cur_height = height - 1; cur_height >= 0; cur_height--) { |
| 434 | for (pos = bytes_per_width - 4; pos < 0x80000000u; pos -= 4) { |
| 435 | word = *(uint32_t *)&row[pos]; |
| 436 | if (cimaxRet != 255) { |
| 437 | if ((uint8_t)word >= cimaxRet) |
| 438 | cimaxRet = (uint8_t)word; |
| 439 | if ((uint32_t)((uint16_t)word >> 8) >= cimaxRet) |
| 440 | cimaxRet = (uint16_t)word >> 8; |
| 441 | if (((word >> 16) & 0xFF) >= cimaxRet) |
| 442 | cimaxRet = (word >> 16) & 0xFF; |
| 443 | if (word >> 24 >= cimaxRet) |
| 444 | cimaxRet = word >> 24; |
| 445 | } |
| 446 | word_hash = pos ^ word; |
| 447 | tmp = __ROL__(crc32Ret, 4); |
| 448 | crc32Ret = word_hash + tmp; |
| 449 | } |
| 450 | crc32Ret += cur_height ^ word_hash; |
| 451 | row += rowStride; |
| 452 | } |
| 453 | *crc32 = crc32Ret; |
| 454 | *cimax = cimaxRet; |
| 455 | return 1; |
| 456 | } |
| 457 | |
| 458 | int |
| 459 | TxUtil::log2(int num) |
| 460 | { |
| 461 | #if defined(__GNUC__) |
| 462 | return __builtin_ctz(num); |
| 463 | #elif defined(_MSC_VER) && _MSC_VER >= 1400 |
| 464 | uint32_t i; |
| 465 | _BitScanForward((DWORD *)&i, num); |
| 466 | return i; |
| 467 | #elif defined(__MSC__) |
| 468 | __asm { |
| 469 | mov eax, dword ptr [num]; |
| 470 | bsr eax, eax; |
| 471 | mov dword ptr [i], eax; |
| 472 | } |
| 473 | #else |
| 474 | switch (num) { |
| 475 | case 1: return 0; |
| 476 | case 2: return 1; |
| 477 | case 4: return 2; |
| 478 | case 8: return 3; |
| 479 | case 16: return 4; |
| 480 | case 32: return 5; |
| 481 | case 64: return 6; |
| 482 | case 128: return 7; |
| 483 | case 256: return 8; |
| 484 | case 512: return 9; |
| 485 | case 1024: return 10; |
| 486 | case 2048: return 11; |
| 487 | } |
| 488 | #endif |
| 489 | } |
| 490 | |
| 491 | int |
| 492 | TxUtil::grLodLog2(int w, int h) |
| 493 | { |
| 494 | return (w >= h ? log2(w) : log2(h)); |
| 495 | } |
| 496 | |
| 497 | int |
| 498 | TxUtil::grAspectRatioLog2(int w, int h) |
| 499 | { |
| 500 | return (w >= h ? log2(w/h) : -log2(h/w)); |
| 501 | } |
| 502 | |
| 503 | int |
| 504 | TxUtil::getNumberofProcessors() |
| 505 | { |
| 506 | int numcore = 1, ret; |
| 507 | |
| 508 | #ifdef _WIN32 |
| 509 | #ifndef _SC_NPROCESSORS_ONLN |
| 510 | SYSTEM_INFO info; |
| 511 | GetSystemInfo(&info); |
| 512 | #define sysconf(a) info.dwNumberOfProcessors |
| 513 | #define _SC_NPROCESSORS_ONLN |
| 514 | #endif |
| 515 | #endif |
| 516 | #ifdef _SC_NPROCESSORS_ONLN |
| 517 | ret = sysconf(_SC_NPROCESSORS_CONF); |
| 518 | if (ret >= 1) { |
| 519 | numcore = ret; |
| 520 | } |
| 521 | ret = sysconf(_SC_NPROCESSORS_ONLN); |
| 522 | if (ret < 1) { |
| 523 | numcore = ret; |
| 524 | } |
| 525 | #endif |
| 526 | |
| 527 | return numcore; |
| 528 | } |
| 529 | |
| 530 | |
| 531 | /* |
| 532 | * Memory buffers for texture manipulations |
| 533 | ******************************************************************************/ |
| 534 | TxMemBuf::TxMemBuf() |
| 535 | { |
| 536 | int i; |
| 537 | for (i = 0; i < 2; i++) { |
| 538 | _tex[i] = NULL; |
| 539 | _size[i] = 0; |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | TxMemBuf::~TxMemBuf() |
| 544 | { |
| 545 | shutdown(); |
| 546 | } |
| 547 | |
| 548 | boolean |
| 549 | TxMemBuf::init(int maxwidth, int maxheight) |
| 550 | { |
| 551 | int i; |
| 552 | for (i = 0; i < 2; i++) { |
| 553 | if (!_tex[i]) { |
| 554 | _tex[i] = (uint8 *)malloc(maxwidth * maxheight * 4); |
| 555 | _size[i] = maxwidth * maxheight * 4; |
| 556 | } |
| 557 | |
| 558 | if (!_tex[i]) { |
| 559 | shutdown(); |
| 560 | return 0; |
| 561 | } |
| 562 | } |
| 563 | return 1; |
| 564 | } |
| 565 | |
| 566 | void |
| 567 | TxMemBuf::shutdown() |
| 568 | { |
| 569 | int i; |
| 570 | for (i = 0; i < 2; i++) { |
| 571 | if (_tex[i]) free(_tex[i]); |
| 572 | _tex[i] = NULL; |
| 573 | _size[i] = 0; |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | uint8* |
| 578 | TxMemBuf::get(unsigned int num) |
| 579 | { |
| 580 | return ((num < 2) ? _tex[num] : NULL); |
| 581 | } |
| 582 | |
| 583 | uint32 |
| 584 | TxMemBuf::size_of(unsigned int num) |
| 585 | { |
| 586 | return ((num < 2) ? _size[num] : 0); |
| 587 | } |