1 // 2 // Copyright 2006 The Android Open Source Project 3 // 4 // Build resource files from raw assets. 5 // 6 7 #define PNG_INTERNAL 8 9 #include "Images.h" 10 11 #include <androidfw/ResourceTypes.h> 12 #include <utils/ByteOrder.h> 13 14 #include <png.h> 15 16 #define NOISY(x) //x 17 18 static void 19 png_write_aapt_file(png_structp png_ptr, png_bytep data, png_size_t length) 20 { 21 status_t err = ((AaptFile*)png_ptr->io_ptr)->writeData(data, length); 22 if (err != NO_ERROR) { 23 png_error(png_ptr, "Write Error"); 24 } 25 } 26 27 28 static void 29 png_flush_aapt_file(png_structp png_ptr) 30 { 31 } 32 33 // This holds an image as 8bpp RGBA. 34 struct image_info 35 { 36 image_info() : rows(NULL), is9Patch(false), allocRows(NULL) { } 37 ~image_info() { 38 if (rows && rows != allocRows) { 39 free(rows); 40 } 41 if (allocRows) { 42 for (int i=0; i<(int)allocHeight; i++) { 43 free(allocRows[i]); 44 } 45 free(allocRows); 46 } 47 free(info9Patch.xDivs); 48 free(info9Patch.yDivs); 49 free(info9Patch.colors); 50 } 51 52 png_uint_32 width; 53 png_uint_32 height; 54 png_bytepp rows; 55 56 // 9-patch info. 57 bool is9Patch; 58 Res_png_9patch info9Patch; 59 60 // Layout padding, if relevant 61 bool haveLayoutBounds; 62 int32_t layoutBoundsLeft; 63 int32_t layoutBoundsTop; 64 int32_t layoutBoundsRight; 65 int32_t layoutBoundsBottom; 66 67 png_uint_32 allocHeight; 68 png_bytepp allocRows; 69 }; 70 71 static void read_png(const char* imageName, 72 png_structp read_ptr, png_infop read_info, 73 image_info* outImageInfo) 74 { 75 int color_type; 76 int bit_depth, interlace_type, compression_type; 77 int i; 78 79 png_read_info(read_ptr, read_info); 80 81 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 82 &outImageInfo->height, &bit_depth, &color_type, 83 &interlace_type, &compression_type, NULL); 84 85 //printf("Image %s:\n", imageName); 86 //printf("color_type=%d, bit_depth=%d, interlace_type=%d, compression_type=%d\n", 87 // color_type, bit_depth, interlace_type, compression_type); 88 89 if (color_type == PNG_COLOR_TYPE_PALETTE) 90 png_set_palette_to_rgb(read_ptr); 91 92 if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) 93 png_set_gray_1_2_4_to_8(read_ptr); 94 95 if (png_get_valid(read_ptr, read_info, PNG_INFO_tRNS)) { 96 //printf("Has PNG_INFO_tRNS!\n"); 97 png_set_tRNS_to_alpha(read_ptr); 98 } 99 100 if (bit_depth == 16) 101 png_set_strip_16(read_ptr); 102 103 if ((color_type&PNG_COLOR_MASK_ALPHA) == 0) 104 png_set_add_alpha(read_ptr, 0xFF, PNG_FILLER_AFTER); 105 106 if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) 107 png_set_gray_to_rgb(read_ptr); 108 109 png_read_update_info(read_ptr, read_info); 110 111 outImageInfo->rows = (png_bytepp)malloc( 112 outImageInfo->height * png_sizeof(png_bytep)); 113 outImageInfo->allocHeight = outImageInfo->height; 114 outImageInfo->allocRows = outImageInfo->rows; 115 116 png_set_rows(read_ptr, read_info, outImageInfo->rows); 117 118 for (i = 0; i < (int)outImageInfo->height; i++) 119 { 120 outImageInfo->rows[i] = (png_bytep) 121 malloc(png_get_rowbytes(read_ptr, read_info)); 122 } 123 124 png_read_image(read_ptr, outImageInfo->rows); 125 126 png_read_end(read_ptr, read_info); 127 128 NOISY(printf("Image %s: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 129 imageName, 130 (int)outImageInfo->width, (int)outImageInfo->height, 131 bit_depth, color_type, 132 interlace_type, compression_type)); 133 134 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 135 &outImageInfo->height, &bit_depth, &color_type, 136 &interlace_type, &compression_type, NULL); 137 } 138 139 #define COLOR_TRANSPARENT 0 140 #define COLOR_WHITE 0xFFFFFFFF 141 #define COLOR_TICK 0xFF000000 142 #define COLOR_LAYOUT_BOUNDS_TICK 0xFF0000FF 143 144 enum { 145 TICK_TYPE_NONE, 146 TICK_TYPE_TICK, 147 TICK_TYPE_LAYOUT_BOUNDS, 148 TICK_TYPE_BOTH 149 }; 150 151 static int tick_type(png_bytep p, bool transparent, const char** outError) 152 { 153 png_uint_32 color = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); 154 155 if (transparent) { 156 if (p[3] == 0) { 157 return TICK_TYPE_NONE; 158 } 159 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 160 return TICK_TYPE_LAYOUT_BOUNDS; 161 } 162 if (color == COLOR_TICK) { 163 return TICK_TYPE_TICK; 164 } 165 166 // Error cases 167 if (p[3] != 0xff) { 168 *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)"; 169 return TICK_TYPE_NONE; 170 } 171 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 172 *outError = "Ticks in transparent frame must be black or red"; 173 } 174 return TICK_TYPE_TICK; 175 } 176 177 if (p[3] != 0xFF) { 178 *outError = "White frame must be a solid color (no alpha)"; 179 } 180 if (color == COLOR_WHITE) { 181 return TICK_TYPE_NONE; 182 } 183 if (color == COLOR_TICK) { 184 return TICK_TYPE_TICK; 185 } 186 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 187 return TICK_TYPE_LAYOUT_BOUNDS; 188 } 189 190 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 191 *outError = "Ticks in white frame must be black or red"; 192 return TICK_TYPE_NONE; 193 } 194 return TICK_TYPE_TICK; 195 } 196 197 enum { 198 TICK_START, 199 TICK_INSIDE_1, 200 TICK_OUTSIDE_1 201 }; 202 203 static status_t get_horizontal_ticks( 204 png_bytep row, int width, bool transparent, bool required, 205 int32_t* outLeft, int32_t* outRight, const char** outError, 206 uint8_t* outDivs, bool multipleAllowed) 207 { 208 int i; 209 *outLeft = *outRight = -1; 210 int state = TICK_START; 211 bool found = false; 212 213 for (i=1; i<width-1; i++) { 214 if (TICK_TYPE_TICK == tick_type(row+i*4, transparent, outError)) { 215 if (state == TICK_START || 216 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 217 *outLeft = i-1; 218 *outRight = width-2; 219 found = true; 220 if (outDivs != NULL) { 221 *outDivs += 2; 222 } 223 state = TICK_INSIDE_1; 224 } else if (state == TICK_OUTSIDE_1) { 225 *outError = "Can't have more than one marked region along edge"; 226 *outLeft = i; 227 return UNKNOWN_ERROR; 228 } 229 } else if (*outError == NULL) { 230 if (state == TICK_INSIDE_1) { 231 // We're done with this div. Move on to the next. 232 *outRight = i-1; 233 outRight += 2; 234 outLeft += 2; 235 state = TICK_OUTSIDE_1; 236 } 237 } else { 238 *outLeft = i; 239 return UNKNOWN_ERROR; 240 } 241 } 242 243 if (required && !found) { 244 *outError = "No marked region found along edge"; 245 *outLeft = -1; 246 return UNKNOWN_ERROR; 247 } 248 249 return NO_ERROR; 250 } 251 252 static status_t get_vertical_ticks( 253 png_bytepp rows, int offset, int height, bool transparent, bool required, 254 int32_t* outTop, int32_t* outBottom, const char** outError, 255 uint8_t* outDivs, bool multipleAllowed) 256 { 257 int i; 258 *outTop = *outBottom = -1; 259 int state = TICK_START; 260 bool found = false; 261 262 for (i=1; i<height-1; i++) { 263 if (TICK_TYPE_TICK == tick_type(rows[i]+offset, transparent, outError)) { 264 if (state == TICK_START || 265 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 266 *outTop = i-1; 267 *outBottom = height-2; 268 found = true; 269 if (outDivs != NULL) { 270 *outDivs += 2; 271 } 272 state = TICK_INSIDE_1; 273 } else if (state == TICK_OUTSIDE_1) { 274 *outError = "Can't have more than one marked region along edge"; 275 *outTop = i; 276 return UNKNOWN_ERROR; 277 } 278 } else if (*outError == NULL) { 279 if (state == TICK_INSIDE_1) { 280 // We're done with this div. Move on to the next. 281 *outBottom = i-1; 282 outTop += 2; 283 outBottom += 2; 284 state = TICK_OUTSIDE_1; 285 } 286 } else { 287 *outTop = i; 288 return UNKNOWN_ERROR; 289 } 290 } 291 292 if (required && !found) { 293 *outError = "No marked region found along edge"; 294 *outTop = -1; 295 return UNKNOWN_ERROR; 296 } 297 298 return NO_ERROR; 299 } 300 301 static status_t get_horizontal_layout_bounds_ticks( 302 png_bytep row, int width, bool transparent, bool required, 303 int32_t* outLeft, int32_t* outRight, const char** outError) 304 { 305 int i; 306 *outLeft = *outRight = 0; 307 308 // Look for left tick 309 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + 4, transparent, outError)) { 310 // Starting with a layout padding tick 311 i = 1; 312 while (i < width - 1) { 313 (*outLeft)++; 314 i++; 315 int tick = tick_type(row + i * 4, transparent, outError); 316 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 317 break; 318 } 319 } 320 } 321 322 // Look for right tick 323 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + (width - 2) * 4, transparent, outError)) { 324 // Ending with a layout padding tick 325 i = width - 2; 326 while (i > 1) { 327 (*outRight)++; 328 i--; 329 int tick = tick_type(row+i*4, transparent, outError); 330 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 331 break; 332 } 333 } 334 } 335 336 return NO_ERROR; 337 } 338 339 static status_t get_vertical_layout_bounds_ticks( 340 png_bytepp rows, int offset, int height, bool transparent, bool required, 341 int32_t* outTop, int32_t* outBottom, const char** outError) 342 { 343 int i; 344 *outTop = *outBottom = 0; 345 346 // Look for top tick 347 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[1] + offset, transparent, outError)) { 348 // Starting with a layout padding tick 349 i = 1; 350 while (i < height - 1) { 351 (*outTop)++; 352 i++; 353 int tick = tick_type(rows[i] + offset, transparent, outError); 354 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 355 break; 356 } 357 } 358 } 359 360 // Look for bottom tick 361 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[height - 2] + offset, transparent, outError)) { 362 // Ending with a layout padding tick 363 i = height - 2; 364 while (i > 1) { 365 (*outBottom)++; 366 i--; 367 int tick = tick_type(rows[i] + offset, transparent, outError); 368 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 369 break; 370 } 371 } 372 } 373 374 return NO_ERROR; 375 } 376 377 378 static uint32_t get_color( 379 png_bytepp rows, int left, int top, int right, int bottom) 380 { 381 png_bytep color = rows[top] + left*4; 382 383 if (left > right || top > bottom) { 384 return Res_png_9patch::TRANSPARENT_COLOR; 385 } 386 387 while (top <= bottom) { 388 for (int i = left; i <= right; i++) { 389 png_bytep p = rows[top]+i*4; 390 if (color[3] == 0) { 391 if (p[3] != 0) { 392 return Res_png_9patch::NO_COLOR; 393 } 394 } else if (p[0] != color[0] || p[1] != color[1] 395 || p[2] != color[2] || p[3] != color[3]) { 396 return Res_png_9patch::NO_COLOR; 397 } 398 } 399 top++; 400 } 401 402 if (color[3] == 0) { 403 return Res_png_9patch::TRANSPARENT_COLOR; 404 } 405 return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; 406 } 407 408 static void select_patch( 409 int which, int front, int back, int size, int* start, int* end) 410 { 411 switch (which) { 412 case 0: 413 *start = 0; 414 *end = front-1; 415 break; 416 case 1: 417 *start = front; 418 *end = back-1; 419 break; 420 case 2: 421 *start = back; 422 *end = size-1; 423 break; 424 } 425 } 426 427 static uint32_t get_color(image_info* image, int hpatch, int vpatch) 428 { 429 int left, right, top, bottom; 430 select_patch( 431 hpatch, image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], 432 image->width, &left, &right); 433 select_patch( 434 vpatch, image->info9Patch.yDivs[0], image->info9Patch.yDivs[1], 435 image->height, &top, &bottom); 436 //printf("Selecting h=%d v=%d: (%d,%d)-(%d,%d)\n", 437 // hpatch, vpatch, left, top, right, bottom); 438 const uint32_t c = get_color(image->rows, left, top, right, bottom); 439 NOISY(printf("Color in (%d,%d)-(%d,%d): #%08x\n", left, top, right, bottom, c)); 440 return c; 441 } 442 443 static status_t do_9patch(const char* imageName, image_info* image) 444 { 445 image->is9Patch = true; 446 447 int W = image->width; 448 int H = image->height; 449 int i, j; 450 451 int maxSizeXDivs = W * sizeof(int32_t); 452 int maxSizeYDivs = H * sizeof(int32_t); 453 int32_t* xDivs = (int32_t*) malloc(maxSizeXDivs); 454 int32_t* yDivs = (int32_t*) malloc(maxSizeYDivs); 455 uint8_t numXDivs = 0; 456 uint8_t numYDivs = 0; 457 int8_t numColors; 458 int numRows; 459 int numCols; 460 int top; 461 int left; 462 int right; 463 int bottom; 464 memset(xDivs, -1, maxSizeXDivs); 465 memset(yDivs, -1, maxSizeYDivs); 466 image->info9Patch.paddingLeft = image->info9Patch.paddingRight = 467 image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; 468 469 image->layoutBoundsLeft = image->layoutBoundsRight = 470 image->layoutBoundsTop = image->layoutBoundsBottom = 0; 471 472 png_bytep p = image->rows[0]; 473 bool transparent = p[3] == 0; 474 bool hasColor = false; 475 476 const char* errorMsg = NULL; 477 int errorPixel = -1; 478 const char* errorEdge = NULL; 479 480 int colorIndex = 0; 481 482 // Validate size... 483 if (W < 3 || H < 3) { 484 errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; 485 goto getout; 486 } 487 488 // Validate frame... 489 if (!transparent && 490 (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { 491 errorMsg = "Must have one-pixel frame that is either transparent or white"; 492 goto getout; 493 } 494 495 // Find left and right of sizing areas... 496 if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], 497 &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { 498 errorPixel = xDivs[0]; 499 errorEdge = "top"; 500 goto getout; 501 } 502 503 // Find top and bottom of sizing areas... 504 if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], 505 &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { 506 errorPixel = yDivs[0]; 507 errorEdge = "left"; 508 goto getout; 509 } 510 511 // Find left and right of padding area... 512 if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, 513 &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { 514 errorPixel = image->info9Patch.paddingLeft; 515 errorEdge = "bottom"; 516 goto getout; 517 } 518 519 // Find top and bottom of padding area... 520 if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, 521 &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { 522 errorPixel = image->info9Patch.paddingTop; 523 errorEdge = "right"; 524 goto getout; 525 } 526 527 // Find left and right of layout padding... 528 get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, 529 &image->layoutBoundsLeft, 530 &image->layoutBoundsRight, &errorMsg); 531 532 get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, 533 &image->layoutBoundsTop, 534 &image->layoutBoundsBottom, &errorMsg); 535 536 image->haveLayoutBounds = image->layoutBoundsLeft != 0 537 || image->layoutBoundsRight != 0 538 || image->layoutBoundsTop != 0 539 || image->layoutBoundsBottom != 0; 540 541 if (image->haveLayoutBounds) { 542 NOISY(printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, 543 image->layoutBoundsRight, image->layoutBoundsBottom)); 544 } 545 546 // Copy patch data into image 547 image->info9Patch.numXDivs = numXDivs; 548 image->info9Patch.numYDivs = numYDivs; 549 image->info9Patch.xDivs = xDivs; 550 image->info9Patch.yDivs = yDivs; 551 552 // If padding is not yet specified, take values from size. 553 if (image->info9Patch.paddingLeft < 0) { 554 image->info9Patch.paddingLeft = xDivs[0]; 555 image->info9Patch.paddingRight = W - 2 - xDivs[1]; 556 } else { 557 // Adjust value to be correct! 558 image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; 559 } 560 if (image->info9Patch.paddingTop < 0) { 561 image->info9Patch.paddingTop = yDivs[0]; 562 image->info9Patch.paddingBottom = H - 2 - yDivs[1]; 563 } else { 564 // Adjust value to be correct! 565 image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; 566 } 567 568 NOISY(printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, 569 image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], 570 image->info9Patch.yDivs[0], image->info9Patch.yDivs[1])); 571 NOISY(printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, 572 image->info9Patch.paddingLeft, image->info9Patch.paddingRight, 573 image->info9Patch.paddingTop, image->info9Patch.paddingBottom)); 574 575 // Remove frame from image. 576 image->rows = (png_bytepp)malloc((H-2) * png_sizeof(png_bytep)); 577 for (i=0; i<(H-2); i++) { 578 image->rows[i] = image->allocRows[i+1]; 579 memmove(image->rows[i], image->rows[i]+4, (W-2)*4); 580 } 581 image->width -= 2; 582 W = image->width; 583 image->height -= 2; 584 H = image->height; 585 586 // Figure out the number of rows and columns in the N-patch 587 numCols = numXDivs + 1; 588 if (xDivs[0] == 0) { // Column 1 is strechable 589 numCols--; 590 } 591 if (xDivs[numXDivs - 1] == W) { 592 numCols--; 593 } 594 numRows = numYDivs + 1; 595 if (yDivs[0] == 0) { // Row 1 is strechable 596 numRows--; 597 } 598 if (yDivs[numYDivs - 1] == H) { 599 numRows--; 600 } 601 602 // Make sure the amount of rows and columns will fit in the number of 603 // colors we can use in the 9-patch format. 604 if (numRows * numCols > 0x7F) { 605 errorMsg = "Too many rows and columns in 9-patch perimeter"; 606 goto getout; 607 } 608 609 numColors = numRows * numCols; 610 image->info9Patch.numColors = numColors; 611 image->info9Patch.colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); 612 613 // Fill in color information for each patch. 614 615 uint32_t c; 616 top = 0; 617 618 // The first row always starts with the top being at y=0 and the bottom 619 // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case 620 // the first row is stretchable along the Y axis, otherwise it is fixed. 621 // The last row always ends with the bottom being bitmap.height and the top 622 // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or 623 // yDivs[numYDivs-1]. In the former case the last row is stretchable along 624 // the Y axis, otherwise it is fixed. 625 // 626 // The first and last columns are similarly treated with respect to the X 627 // axis. 628 // 629 // The above is to help explain some of the special casing that goes on the 630 // code below. 631 632 // The initial yDiv and whether the first row is considered stretchable or 633 // not depends on whether yDiv[0] was zero or not. 634 for (j = (yDivs[0] == 0 ? 1 : 0); 635 j <= numYDivs && top < H; 636 j++) { 637 if (j == numYDivs) { 638 bottom = H; 639 } else { 640 bottom = yDivs[j]; 641 } 642 left = 0; 643 // The initial xDiv and whether the first column is considered 644 // stretchable or not depends on whether xDiv[0] was zero or not. 645 for (i = xDivs[0] == 0 ? 1 : 0; 646 i <= numXDivs && left < W; 647 i++) { 648 if (i == numXDivs) { 649 right = W; 650 } else { 651 right = xDivs[i]; 652 } 653 c = get_color(image->rows, left, top, right - 1, bottom - 1); 654 image->info9Patch.colors[colorIndex++] = c; 655 NOISY(if (c != Res_png_9patch::NO_COLOR) hasColor = true); 656 left = right; 657 } 658 top = bottom; 659 } 660 661 assert(colorIndex == numColors); 662 663 for (i=0; i<numColors; i++) { 664 if (hasColor) { 665 if (i == 0) printf("Colors in %s:\n ", imageName); 666 printf(" #%08x", image->info9Patch.colors[i]); 667 if (i == numColors - 1) printf("\n"); 668 } 669 } 670 671 image->is9Patch = true; 672 image->info9Patch.deviceToFile(); 673 674 getout: 675 if (errorMsg) { 676 fprintf(stderr, 677 "ERROR: 9-patch image %s malformed.\n" 678 " %s.\n", imageName, errorMsg); 679 if (errorEdge != NULL) { 680 if (errorPixel >= 0) { 681 fprintf(stderr, 682 " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); 683 } else { 684 fprintf(stderr, 685 " Found along %s edge.\n", errorEdge); 686 } 687 } 688 return UNKNOWN_ERROR; 689 } 690 return NO_ERROR; 691 } 692 693 static void checkNinePatchSerialization(Res_png_9patch* inPatch, void * data) 694 { 695 if (sizeof(void*) != sizeof(int32_t)) { 696 // can't deserialize on a non-32 bit system 697 return; 698 } 699 size_t patchSize = inPatch->serializedSize(); 700 void * newData = malloc(patchSize); 701 memcpy(newData, data, patchSize); 702 Res_png_9patch* outPatch = inPatch->deserialize(newData); 703 // deserialization is done in place, so outPatch == newData 704 assert(outPatch == newData); 705 assert(outPatch->numXDivs == inPatch->numXDivs); 706 assert(outPatch->numYDivs == inPatch->numYDivs); 707 assert(outPatch->paddingLeft == inPatch->paddingLeft); 708 assert(outPatch->paddingRight == inPatch->paddingRight); 709 assert(outPatch->paddingTop == inPatch->paddingTop); 710 assert(outPatch->paddingBottom == inPatch->paddingBottom); 711 for (int i = 0; i < outPatch->numXDivs; i++) { 712 assert(outPatch->xDivs[i] == inPatch->xDivs[i]); 713 } 714 for (int i = 0; i < outPatch->numYDivs; i++) { 715 assert(outPatch->yDivs[i] == inPatch->yDivs[i]); 716 } 717 for (int i = 0; i < outPatch->numColors; i++) { 718 assert(outPatch->colors[i] == inPatch->colors[i]); 719 } 720 free(newData); 721 } 722 723 static bool patch_equals(Res_png_9patch& patch1, Res_png_9patch& patch2) { 724 if (!(patch1.numXDivs == patch2.numXDivs && 725 patch1.numYDivs == patch2.numYDivs && 726 patch1.numColors == patch2.numColors && 727 patch1.paddingLeft == patch2.paddingLeft && 728 patch1.paddingRight == patch2.paddingRight && 729 patch1.paddingTop == patch2.paddingTop && 730 patch1.paddingBottom == patch2.paddingBottom)) { 731 return false; 732 } 733 for (int i = 0; i < patch1.numColors; i++) { 734 if (patch1.colors[i] != patch2.colors[i]) { 735 return false; 736 } 737 } 738 for (int i = 0; i < patch1.numXDivs; i++) { 739 if (patch1.xDivs[i] != patch2.xDivs[i]) { 740 return false; 741 } 742 } 743 for (int i = 0; i < patch1.numYDivs; i++) { 744 if (patch1.yDivs[i] != patch2.yDivs[i]) { 745 return false; 746 } 747 } 748 return true; 749 } 750 751 static void dump_image(int w, int h, png_bytepp rows, int color_type) 752 { 753 int i, j, rr, gg, bb, aa; 754 755 int bpp; 756 if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { 757 bpp = 1; 758 } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { 759 bpp = 2; 760 } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 761 // We use a padding byte even when there is no alpha 762 bpp = 4; 763 } else { 764 printf("Unknown color type %d.\n", color_type); 765 } 766 767 for (j = 0; j < h; j++) { 768 png_bytep row = rows[j]; 769 for (i = 0; i < w; i++) { 770 rr = row[0]; 771 gg = row[1]; 772 bb = row[2]; 773 aa = row[3]; 774 row += bpp; 775 776 if (i == 0) { 777 printf("Row %d:", j); 778 } 779 switch (bpp) { 780 case 1: 781 printf(" (%d)", rr); 782 break; 783 case 2: 784 printf(" (%d %d", rr, gg); 785 break; 786 case 3: 787 printf(" (%d %d %d)", rr, gg, bb); 788 break; 789 case 4: 790 printf(" (%d %d %d %d)", rr, gg, bb, aa); 791 break; 792 } 793 if (i == (w - 1)) { 794 NOISY(printf("\n")); 795 } 796 } 797 } 798 } 799 800 #define MAX(a,b) ((a)>(b)?(a):(b)) 801 #define ABS(a) ((a)<0?-(a):(a)) 802 803 static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, 804 png_colorp rgbPalette, png_bytep alphaPalette, 805 int *paletteEntries, bool *hasTransparency, int *colorType, 806 png_bytepp outRows) 807 { 808 int w = imageInfo.width; 809 int h = imageInfo.height; 810 int i, j, rr, gg, bb, aa, idx; 811 uint32_t colors[256], col; 812 int num_colors = 0; 813 int maxGrayDeviation = 0; 814 815 bool isOpaque = true; 816 bool isPalette = true; 817 bool isGrayscale = true; 818 819 // Scan the entire image and determine if: 820 // 1. Every pixel has R == G == B (grayscale) 821 // 2. Every pixel has A == 255 (opaque) 822 // 3. There are no more than 256 distinct RGBA colors 823 824 // NOISY(printf("Initial image data:\n")); 825 // dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); 826 827 for (j = 0; j < h; j++) { 828 png_bytep row = imageInfo.rows[j]; 829 png_bytep out = outRows[j]; 830 for (i = 0; i < w; i++) { 831 rr = *row++; 832 gg = *row++; 833 bb = *row++; 834 aa = *row++; 835 836 int odev = maxGrayDeviation; 837 maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); 838 maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); 839 maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); 840 if (maxGrayDeviation > odev) { 841 NOISY(printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", 842 maxGrayDeviation, i, j, rr, gg, bb, aa)); 843 } 844 845 // Check if image is really grayscale 846 if (isGrayscale) { 847 if (rr != gg || rr != bb) { 848 NOISY(printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", 849 i, j, rr, gg, bb, aa)); 850 isGrayscale = false; 851 } 852 } 853 854 // Check if image is really opaque 855 if (isOpaque) { 856 if (aa != 0xff) { 857 NOISY(printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", 858 i, j, rr, gg, bb, aa)); 859 isOpaque = false; 860 } 861 } 862 863 // Check if image is really <= 256 colors 864 if (isPalette) { 865 col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); 866 bool match = false; 867 for (idx = 0; idx < num_colors; idx++) { 868 if (colors[idx] == col) { 869 match = true; 870 break; 871 } 872 } 873 874 // Write the palette index for the pixel to outRows optimistically 875 // We might overwrite it later if we decide to encode as gray or 876 // gray + alpha 877 *out++ = idx; 878 if (!match) { 879 if (num_colors == 256) { 880 NOISY(printf("Found 257th color at %d, %d\n", i, j)); 881 isPalette = false; 882 } else { 883 colors[num_colors++] = col; 884 } 885 } 886 } 887 } 888 } 889 890 *paletteEntries = 0; 891 *hasTransparency = !isOpaque; 892 int bpp = isOpaque ? 3 : 4; 893 int paletteSize = w * h + bpp * num_colors; 894 895 NOISY(printf("isGrayscale = %s\n", isGrayscale ? "true" : "false")); 896 NOISY(printf("isOpaque = %s\n", isOpaque ? "true" : "false")); 897 NOISY(printf("isPalette = %s\n", isPalette ? "true" : "false")); 898 NOISY(printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", 899 paletteSize, 2 * w * h, bpp * w * h)); 900 NOISY(printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance)); 901 902 // Choose the best color type for the image. 903 // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel 904 // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations 905 // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA 906 // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently 907 // small, otherwise use COLOR_TYPE_RGB{_ALPHA} 908 if (isGrayscale) { 909 if (isOpaque) { 910 *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel 911 } else { 912 // Use a simple heuristic to determine whether using a palette will 913 // save space versus using gray + alpha for each pixel. 914 // This doesn't take into account chunk overhead, filtering, LZ 915 // compression, etc. 916 if (isPalette && (paletteSize < 2 * w * h)) { 917 *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color 918 } else { 919 *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel 920 } 921 } 922 } else if (isPalette && (paletteSize < bpp * w * h)) { 923 *colorType = PNG_COLOR_TYPE_PALETTE; 924 } else { 925 if (maxGrayDeviation <= grayscaleTolerance) { 926 printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); 927 *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; 928 } else { 929 *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; 930 } 931 } 932 933 // Perform postprocessing of the image or palette data based on the final 934 // color type chosen 935 936 if (*colorType == PNG_COLOR_TYPE_PALETTE) { 937 // Create separate RGB and Alpha palettes and set the number of colors 938 *paletteEntries = num_colors; 939 940 // Create the RGB and alpha palettes 941 for (int idx = 0; idx < num_colors; idx++) { 942 col = colors[idx]; 943 rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); 944 rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); 945 rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); 946 alphaPalette[idx] = (png_byte) (col & 0xff); 947 } 948 } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { 949 // If the image is gray or gray + alpha, compact the pixels into outRows 950 for (j = 0; j < h; j++) { 951 png_bytep row = imageInfo.rows[j]; 952 png_bytep out = outRows[j]; 953 for (i = 0; i < w; i++) { 954 rr = *row++; 955 gg = *row++; 956 bb = *row++; 957 aa = *row++; 958 959 if (isGrayscale) { 960 *out++ = rr; 961 } else { 962 *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); 963 } 964 if (!isOpaque) { 965 *out++ = aa; 966 } 967 } 968 } 969 } 970 } 971 972 973 static void write_png(const char* imageName, 974 png_structp write_ptr, png_infop write_info, 975 image_info& imageInfo, int grayscaleTolerance) 976 { 977 bool optimize = true; 978 png_uint_32 width, height; 979 int color_type; 980 int bit_depth, interlace_type, compression_type; 981 int i; 982 983 png_unknown_chunk unknowns[2]; 984 unknowns[0].data = NULL; 985 unknowns[1].data = NULL; 986 987 png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * png_sizeof(png_bytep)); 988 if (outRows == (png_bytepp) 0) { 989 printf("Can't allocate output buffer!\n"); 990 exit(1); 991 } 992 for (i = 0; i < (int) imageInfo.height; i++) { 993 outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); 994 if (outRows[i] == (png_bytep) 0) { 995 printf("Can't allocate output buffer!\n"); 996 exit(1); 997 } 998 } 999 1000 png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); 1001 1002 NOISY(printf("Writing image %s: w = %d, h = %d\n", imageName, 1003 (int) imageInfo.width, (int) imageInfo.height)); 1004 1005 png_color rgbPalette[256]; 1006 png_byte alphaPalette[256]; 1007 bool hasTransparency; 1008 int paletteEntries; 1009 1010 analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, 1011 &paletteEntries, &hasTransparency, &color_type, outRows); 1012 1013 // If the image is a 9-patch, we need to preserve it as a ARGB file to make 1014 // sure the pixels will not be pre-dithered/clamped until we decide they are 1015 if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || 1016 color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { 1017 color_type = PNG_COLOR_TYPE_RGB_ALPHA; 1018 } 1019 1020 switch (color_type) { 1021 case PNG_COLOR_TYPE_PALETTE: 1022 NOISY(printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", 1023 imageName, paletteEntries, 1024 hasTransparency ? " (with alpha)" : "")); 1025 break; 1026 case PNG_COLOR_TYPE_GRAY: 1027 NOISY(printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName)); 1028 break; 1029 case PNG_COLOR_TYPE_GRAY_ALPHA: 1030 NOISY(printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName)); 1031 break; 1032 case PNG_COLOR_TYPE_RGB: 1033 NOISY(printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName)); 1034 break; 1035 case PNG_COLOR_TYPE_RGB_ALPHA: 1036 NOISY(printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName)); 1037 break; 1038 } 1039 1040 png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, 1041 8, color_type, PNG_INTERLACE_NONE, 1042 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); 1043 1044 if (color_type == PNG_COLOR_TYPE_PALETTE) { 1045 png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); 1046 if (hasTransparency) { 1047 png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); 1048 } 1049 png_set_filter(write_ptr, 0, PNG_NO_FILTERS); 1050 } else { 1051 png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); 1052 } 1053 1054 if (imageInfo.is9Patch) { 1055 int chunk_count = 1 + (imageInfo.haveLayoutBounds ? 1 : 0); 1056 int p_index = imageInfo.haveLayoutBounds ? 1 : 0; 1057 int b_index = 0; 1058 png_byte *chunk_names = imageInfo.haveLayoutBounds 1059 ? (png_byte*)"npLb\0npTc\0" 1060 : (png_byte*)"npTc"; 1061 NOISY(printf("Adding 9-patch info...\n")); 1062 strcpy((char*)unknowns[p_index].name, "npTc"); 1063 unknowns[p_index].data = (png_byte*)imageInfo.info9Patch.serialize(); 1064 unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); 1065 // TODO: remove the check below when everything works 1066 checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); 1067 1068 if (imageInfo.haveLayoutBounds) { 1069 int chunk_size = sizeof(png_uint_32) * 4; 1070 strcpy((char*)unknowns[b_index].name, "npLb"); 1071 unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); 1072 memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); 1073 unknowns[b_index].size = chunk_size; 1074 } 1075 1076 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1077 chunk_names, chunk_count); 1078 png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); 1079 // XXX I can't get this to work without forcibly changing 1080 // the location to what I want... which apparently is supposed 1081 // to be a private API, but everything else I have tried results 1082 // in the location being set to what I -last- wrote so I never 1083 // get written. :p 1084 png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); 1085 if (imageInfo.haveLayoutBounds) { 1086 png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); 1087 } 1088 } 1089 1090 1091 png_write_info(write_ptr, write_info); 1092 1093 png_bytepp rows; 1094 if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 1095 png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); 1096 rows = imageInfo.rows; 1097 } else { 1098 rows = outRows; 1099 } 1100 png_write_image(write_ptr, rows); 1101 1102 // NOISY(printf("Final image data:\n")); 1103 // dump_image(imageInfo.width, imageInfo.height, rows, color_type); 1104 1105 png_write_end(write_ptr, write_info); 1106 1107 for (i = 0; i < (int) imageInfo.height; i++) { 1108 free(outRows[i]); 1109 } 1110 free(outRows); 1111 free(unknowns[0].data); 1112 free(unknowns[1].data); 1113 1114 png_get_IHDR(write_ptr, write_info, &width, &height, 1115 &bit_depth, &color_type, &interlace_type, 1116 &compression_type, NULL); 1117 1118 NOISY(printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 1119 (int)width, (int)height, bit_depth, color_type, interlace_type, 1120 compression_type)); 1121 } 1122 1123 status_t preProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1124 const sp<AaptFile>& file, String8* outNewLeafName) 1125 { 1126 String8 ext(file->getPath().getPathExtension()); 1127 1128 // We currently only process PNG images. 1129 if (strcmp(ext.string(), ".png") != 0) { 1130 return NO_ERROR; 1131 } 1132 1133 // Example of renaming a file: 1134 //*outNewLeafName = file->getPath().getBasePath().getFileName(); 1135 //outNewLeafName->append(".nupng"); 1136 1137 String8 printableName(file->getPrintableSource()); 1138 1139 if (bundle->getVerbose()) { 1140 printf("Processing image: %s\n", printableName.string()); 1141 } 1142 1143 png_structp read_ptr = NULL; 1144 png_infop read_info = NULL; 1145 FILE* fp; 1146 1147 image_info imageInfo; 1148 1149 png_structp write_ptr = NULL; 1150 png_infop write_info = NULL; 1151 1152 status_t error = UNKNOWN_ERROR; 1153 1154 const size_t nameLen = file->getPath().length(); 1155 1156 fp = fopen(file->getSourceFile().string(), "rb"); 1157 if (fp == NULL) { 1158 fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); 1159 goto bail; 1160 } 1161 1162 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1163 (png_error_ptr)NULL); 1164 if (!read_ptr) { 1165 goto bail; 1166 } 1167 1168 read_info = png_create_info_struct(read_ptr); 1169 if (!read_info) { 1170 goto bail; 1171 } 1172 1173 if (setjmp(png_jmpbuf(read_ptr))) { 1174 goto bail; 1175 } 1176 1177 png_init_io(read_ptr, fp); 1178 1179 read_png(printableName.string(), read_ptr, read_info, &imageInfo); 1180 1181 if (nameLen > 6) { 1182 const char* name = file->getPath().string(); 1183 if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { 1184 if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { 1185 goto bail; 1186 } 1187 } 1188 } 1189 1190 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1191 (png_error_ptr)NULL); 1192 if (!write_ptr) 1193 { 1194 goto bail; 1195 } 1196 1197 write_info = png_create_info_struct(write_ptr); 1198 if (!write_info) 1199 { 1200 goto bail; 1201 } 1202 1203 png_set_write_fn(write_ptr, (void*)file.get(), 1204 png_write_aapt_file, png_flush_aapt_file); 1205 1206 if (setjmp(png_jmpbuf(write_ptr))) 1207 { 1208 goto bail; 1209 } 1210 1211 write_png(printableName.string(), write_ptr, write_info, imageInfo, 1212 bundle->getGrayscaleTolerance()); 1213 1214 error = NO_ERROR; 1215 1216 if (bundle->getVerbose()) { 1217 fseek(fp, 0, SEEK_END); 1218 size_t oldSize = (size_t)ftell(fp); 1219 size_t newSize = file->getSize(); 1220 float factor = ((float)newSize)/oldSize; 1221 int percent = (int)(factor*100); 1222 printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); 1223 } 1224 1225 bail: 1226 if (read_ptr) { 1227 png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); 1228 } 1229 if (fp) { 1230 fclose(fp); 1231 } 1232 if (write_ptr) { 1233 png_destroy_write_struct(&write_ptr, &write_info); 1234 } 1235 1236 if (error != NO_ERROR) { 1237 fprintf(stderr, "ERROR: Failure processing PNG image %s\n", 1238 file->getPrintableSource().string()); 1239 } 1240 return error; 1241 } 1242 1243 status_t preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) 1244 { 1245 png_structp read_ptr = NULL; 1246 png_infop read_info = NULL; 1247 1248 FILE* fp; 1249 1250 image_info imageInfo; 1251 1252 png_structp write_ptr = NULL; 1253 png_infop write_info = NULL; 1254 1255 status_t error = UNKNOWN_ERROR; 1256 1257 if (bundle->getVerbose()) { 1258 printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); 1259 } 1260 1261 // Get a file handler to read from 1262 fp = fopen(source.string(),"rb"); 1263 if (fp == NULL) { 1264 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); 1265 return error; 1266 } 1267 1268 // Call libpng to get a struct to read image data into 1269 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1270 if (!read_ptr) { 1271 fclose(fp); 1272 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1273 return error; 1274 } 1275 1276 // Call libpng to get a struct to read image info into 1277 read_info = png_create_info_struct(read_ptr); 1278 if (!read_info) { 1279 fclose(fp); 1280 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1281 return error; 1282 } 1283 1284 // Set a jump point for libpng to long jump back to on error 1285 if (setjmp(png_jmpbuf(read_ptr))) { 1286 fclose(fp); 1287 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1288 return error; 1289 } 1290 1291 // Set up libpng to read from our file. 1292 png_init_io(read_ptr,fp); 1293 1294 // Actually read data from the file 1295 read_png(source.string(), read_ptr, read_info, &imageInfo); 1296 1297 // We're done reading so we can clean up 1298 // Find old file size before releasing handle 1299 fseek(fp, 0, SEEK_END); 1300 size_t oldSize = (size_t)ftell(fp); 1301 fclose(fp); 1302 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1303 1304 // Check to see if we're dealing with a 9-patch 1305 // If we are, process appropriately 1306 if (source.getBasePath().getPathExtension() == ".9") { 1307 if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { 1308 return error; 1309 } 1310 } 1311 1312 // Call libpng to create a structure to hold the processed image data 1313 // that can be written to disk 1314 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1315 if (!write_ptr) { 1316 png_destroy_write_struct(&write_ptr, &write_info); 1317 return error; 1318 } 1319 1320 // Call libpng to create a structure to hold processed image info that can 1321 // be written to disk 1322 write_info = png_create_info_struct(write_ptr); 1323 if (!write_info) { 1324 png_destroy_write_struct(&write_ptr, &write_info); 1325 return error; 1326 } 1327 1328 // Open up our destination file for writing 1329 fp = fopen(dest.string(), "wb"); 1330 if (!fp) { 1331 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); 1332 png_destroy_write_struct(&write_ptr, &write_info); 1333 return error; 1334 } 1335 1336 // Set up libpng to write to our file 1337 png_init_io(write_ptr, fp); 1338 1339 // Set up a jump for libpng to long jump back on on errors 1340 if (setjmp(png_jmpbuf(write_ptr))) { 1341 fclose(fp); 1342 png_destroy_write_struct(&write_ptr, &write_info); 1343 return error; 1344 } 1345 1346 // Actually write out to the new png 1347 write_png(dest.string(), write_ptr, write_info, imageInfo, 1348 bundle->getGrayscaleTolerance()); 1349 1350 if (bundle->getVerbose()) { 1351 // Find the size of our new file 1352 FILE* reader = fopen(dest.string(), "rb"); 1353 fseek(reader, 0, SEEK_END); 1354 size_t newSize = (size_t)ftell(reader); 1355 fclose(reader); 1356 1357 float factor = ((float)newSize)/oldSize; 1358 int percent = (int)(factor*100); 1359 printf(" (processed image to cache entry %s: %d%% size of source)\n", 1360 dest.string(), percent); 1361 } 1362 1363 //Clean up 1364 fclose(fp); 1365 png_destroy_write_struct(&write_ptr, &write_info); 1366 1367 return NO_ERROR; 1368 } 1369 1370 status_t postProcessImage(const sp<AaptAssets>& assets, 1371 ResourceTable* table, const sp<AaptFile>& file) 1372 { 1373 String8 ext(file->getPath().getPathExtension()); 1374 1375 // At this point, now that we have all the resource data, all we need to 1376 // do is compile XML files. 1377 if (strcmp(ext.string(), ".xml") == 0) { 1378 return compileXmlFile(assets, file, table); 1379 } 1380 1381 return NO_ERROR; 1382 } 1383
