Images.cpp revision 6381dd4ff212a95be30d2b445d40ff419ab076b4
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#include <zlib.h> 16 17#define NOISY(x) //x 18 19static void 20png_write_aapt_file(png_structp png_ptr, png_bytep data, png_size_t length) 21{ 22 AaptFile* aaptfile = (AaptFile*) png_get_io_ptr(png_ptr); 23 status_t err = aaptfile->writeData(data, length); 24 if (err != NO_ERROR) { 25 png_error(png_ptr, "Write Error"); 26 } 27} 28 29 30static void 31png_flush_aapt_file(png_structp png_ptr) 32{ 33} 34 35// This holds an image as 8bpp RGBA. 36struct image_info 37{ 38 image_info() : rows(NULL), is9Patch(false), 39 xDivs(NULL), yDivs(NULL), colors(NULL), allocRows(NULL) { } 40 41 ~image_info() { 42 if (rows && rows != allocRows) { 43 free(rows); 44 } 45 if (allocRows) { 46 for (int i=0; i<(int)allocHeight; i++) { 47 free(allocRows[i]); 48 } 49 free(allocRows); 50 } 51 free(xDivs); 52 free(yDivs); 53 free(colors); 54 } 55 56 void* serialize9patch() { 57 void* serialized = Res_png_9patch::serialize(info9Patch, xDivs, yDivs, colors); 58 reinterpret_cast<Res_png_9patch*>(serialized)->deviceToFile(); 59 return serialized; 60 } 61 62 png_uint_32 width; 63 png_uint_32 height; 64 png_bytepp rows; 65 66 // 9-patch info. 67 bool is9Patch; 68 Res_png_9patch info9Patch; 69 int32_t* xDivs; 70 int32_t* yDivs; 71 uint32_t* colors; 72 73 // Layout padding, if relevant 74 bool haveLayoutBounds; 75 int32_t layoutBoundsLeft; 76 int32_t layoutBoundsTop; 77 int32_t layoutBoundsRight; 78 int32_t layoutBoundsBottom; 79 80 png_uint_32 allocHeight; 81 png_bytepp allocRows; 82}; 83 84static void read_png(const char* imageName, 85 png_structp read_ptr, png_infop read_info, 86 image_info* outImageInfo) 87{ 88 int color_type; 89 int bit_depth, interlace_type, compression_type; 90 int i; 91 92 png_read_info(read_ptr, read_info); 93 94 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 95 &outImageInfo->height, &bit_depth, &color_type, 96 &interlace_type, &compression_type, NULL); 97 98 //printf("Image %s:\n", imageName); 99 //printf("color_type=%d, bit_depth=%d, interlace_type=%d, compression_type=%d\n", 100 // color_type, bit_depth, interlace_type, compression_type); 101 102 if (color_type == PNG_COLOR_TYPE_PALETTE) 103 png_set_palette_to_rgb(read_ptr); 104 105 if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) 106 png_set_expand_gray_1_2_4_to_8(read_ptr); 107 108 if (png_get_valid(read_ptr, read_info, PNG_INFO_tRNS)) { 109 //printf("Has PNG_INFO_tRNS!\n"); 110 png_set_tRNS_to_alpha(read_ptr); 111 } 112 113 if (bit_depth == 16) 114 png_set_strip_16(read_ptr); 115 116 if ((color_type&PNG_COLOR_MASK_ALPHA) == 0) 117 png_set_add_alpha(read_ptr, 0xFF, PNG_FILLER_AFTER); 118 119 if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) 120 png_set_gray_to_rgb(read_ptr); 121 122 png_read_update_info(read_ptr, read_info); 123 124 outImageInfo->rows = (png_bytepp)malloc( 125 outImageInfo->height * sizeof(png_bytep)); 126 outImageInfo->allocHeight = outImageInfo->height; 127 outImageInfo->allocRows = outImageInfo->rows; 128 129 png_set_rows(read_ptr, read_info, outImageInfo->rows); 130 131 for (i = 0; i < (int)outImageInfo->height; i++) 132 { 133 outImageInfo->rows[i] = (png_bytep) 134 malloc(png_get_rowbytes(read_ptr, read_info)); 135 } 136 137 png_read_image(read_ptr, outImageInfo->rows); 138 139 png_read_end(read_ptr, read_info); 140 141 NOISY(printf("Image %s: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 142 imageName, 143 (int)outImageInfo->width, (int)outImageInfo->height, 144 bit_depth, color_type, 145 interlace_type, compression_type)); 146 147 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 148 &outImageInfo->height, &bit_depth, &color_type, 149 &interlace_type, &compression_type, NULL); 150} 151 152#define COLOR_TRANSPARENT 0 153#define COLOR_WHITE 0xFFFFFFFF 154#define COLOR_TICK 0xFF000000 155#define COLOR_LAYOUT_BOUNDS_TICK 0xFF0000FF 156 157enum { 158 TICK_TYPE_NONE, 159 TICK_TYPE_TICK, 160 TICK_TYPE_LAYOUT_BOUNDS, 161 TICK_TYPE_BOTH 162}; 163 164static int tick_type(png_bytep p, bool transparent, const char** outError) 165{ 166 png_uint_32 color = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); 167 168 if (transparent) { 169 if (p[3] == 0) { 170 return TICK_TYPE_NONE; 171 } 172 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 173 return TICK_TYPE_LAYOUT_BOUNDS; 174 } 175 if (color == COLOR_TICK) { 176 return TICK_TYPE_TICK; 177 } 178 179 // Error cases 180 if (p[3] != 0xff) { 181 *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)"; 182 return TICK_TYPE_NONE; 183 } 184 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 185 *outError = "Ticks in transparent frame must be black or red"; 186 } 187 return TICK_TYPE_TICK; 188 } 189 190 if (p[3] != 0xFF) { 191 *outError = "White frame must be a solid color (no alpha)"; 192 } 193 if (color == COLOR_WHITE) { 194 return TICK_TYPE_NONE; 195 } 196 if (color == COLOR_TICK) { 197 return TICK_TYPE_TICK; 198 } 199 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 200 return TICK_TYPE_LAYOUT_BOUNDS; 201 } 202 203 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 204 *outError = "Ticks in white frame must be black or red"; 205 return TICK_TYPE_NONE; 206 } 207 return TICK_TYPE_TICK; 208} 209 210enum { 211 TICK_START, 212 TICK_INSIDE_1, 213 TICK_OUTSIDE_1 214}; 215 216static status_t get_horizontal_ticks( 217 png_bytep row, int width, bool transparent, bool required, 218 int32_t* outLeft, int32_t* outRight, const char** outError, 219 uint8_t* outDivs, bool multipleAllowed) 220{ 221 int i; 222 *outLeft = *outRight = -1; 223 int state = TICK_START; 224 bool found = false; 225 226 for (i=1; i<width-1; i++) { 227 if (TICK_TYPE_TICK == tick_type(row+i*4, transparent, outError)) { 228 if (state == TICK_START || 229 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 230 *outLeft = i-1; 231 *outRight = width-2; 232 found = true; 233 if (outDivs != NULL) { 234 *outDivs += 2; 235 } 236 state = TICK_INSIDE_1; 237 } else if (state == TICK_OUTSIDE_1) { 238 *outError = "Can't have more than one marked region along edge"; 239 *outLeft = i; 240 return UNKNOWN_ERROR; 241 } 242 } else if (*outError == NULL) { 243 if (state == TICK_INSIDE_1) { 244 // We're done with this div. Move on to the next. 245 *outRight = i-1; 246 outRight += 2; 247 outLeft += 2; 248 state = TICK_OUTSIDE_1; 249 } 250 } else { 251 *outLeft = i; 252 return UNKNOWN_ERROR; 253 } 254 } 255 256 if (required && !found) { 257 *outError = "No marked region found along edge"; 258 *outLeft = -1; 259 return UNKNOWN_ERROR; 260 } 261 262 return NO_ERROR; 263} 264 265static status_t get_vertical_ticks( 266 png_bytepp rows, int offset, int height, bool transparent, bool required, 267 int32_t* outTop, int32_t* outBottom, const char** outError, 268 uint8_t* outDivs, bool multipleAllowed) 269{ 270 int i; 271 *outTop = *outBottom = -1; 272 int state = TICK_START; 273 bool found = false; 274 275 for (i=1; i<height-1; i++) { 276 if (TICK_TYPE_TICK == tick_type(rows[i]+offset, transparent, outError)) { 277 if (state == TICK_START || 278 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 279 *outTop = i-1; 280 *outBottom = height-2; 281 found = true; 282 if (outDivs != NULL) { 283 *outDivs += 2; 284 } 285 state = TICK_INSIDE_1; 286 } else if (state == TICK_OUTSIDE_1) { 287 *outError = "Can't have more than one marked region along edge"; 288 *outTop = i; 289 return UNKNOWN_ERROR; 290 } 291 } else if (*outError == NULL) { 292 if (state == TICK_INSIDE_1) { 293 // We're done with this div. Move on to the next. 294 *outBottom = i-1; 295 outTop += 2; 296 outBottom += 2; 297 state = TICK_OUTSIDE_1; 298 } 299 } else { 300 *outTop = i; 301 return UNKNOWN_ERROR; 302 } 303 } 304 305 if (required && !found) { 306 *outError = "No marked region found along edge"; 307 *outTop = -1; 308 return UNKNOWN_ERROR; 309 } 310 311 return NO_ERROR; 312} 313 314static status_t get_horizontal_layout_bounds_ticks( 315 png_bytep row, int width, bool transparent, bool required, 316 int32_t* outLeft, int32_t* outRight, const char** outError) 317{ 318 int i; 319 *outLeft = *outRight = 0; 320 321 // Look for left tick 322 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + 4, transparent, outError)) { 323 // Starting with a layout padding tick 324 i = 1; 325 while (i < width - 1) { 326 (*outLeft)++; 327 i++; 328 int tick = tick_type(row + i * 4, transparent, outError); 329 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 330 break; 331 } 332 } 333 } 334 335 // Look for right tick 336 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + (width - 2) * 4, transparent, outError)) { 337 // Ending with a layout padding tick 338 i = width - 2; 339 while (i > 1) { 340 (*outRight)++; 341 i--; 342 int tick = tick_type(row+i*4, transparent, outError); 343 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 344 break; 345 } 346 } 347 } 348 349 return NO_ERROR; 350} 351 352static status_t get_vertical_layout_bounds_ticks( 353 png_bytepp rows, int offset, int height, bool transparent, bool required, 354 int32_t* outTop, int32_t* outBottom, const char** outError) 355{ 356 int i; 357 *outTop = *outBottom = 0; 358 359 // Look for top tick 360 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[1] + offset, transparent, outError)) { 361 // Starting with a layout padding tick 362 i = 1; 363 while (i < height - 1) { 364 (*outTop)++; 365 i++; 366 int tick = tick_type(rows[i] + offset, transparent, outError); 367 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 368 break; 369 } 370 } 371 } 372 373 // Look for bottom tick 374 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[height - 2] + offset, transparent, outError)) { 375 // Ending with a layout padding tick 376 i = height - 2; 377 while (i > 1) { 378 (*outBottom)++; 379 i--; 380 int tick = tick_type(rows[i] + offset, transparent, outError); 381 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 382 break; 383 } 384 } 385 } 386 387 return NO_ERROR; 388} 389 390 391static uint32_t get_color( 392 png_bytepp rows, int left, int top, int right, int bottom) 393{ 394 png_bytep color = rows[top] + left*4; 395 396 if (left > right || top > bottom) { 397 return Res_png_9patch::TRANSPARENT_COLOR; 398 } 399 400 while (top <= bottom) { 401 for (int i = left; i <= right; i++) { 402 png_bytep p = rows[top]+i*4; 403 if (color[3] == 0) { 404 if (p[3] != 0) { 405 return Res_png_9patch::NO_COLOR; 406 } 407 } else if (p[0] != color[0] || p[1] != color[1] 408 || p[2] != color[2] || p[3] != color[3]) { 409 return Res_png_9patch::NO_COLOR; 410 } 411 } 412 top++; 413 } 414 415 if (color[3] == 0) { 416 return Res_png_9patch::TRANSPARENT_COLOR; 417 } 418 return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; 419} 420 421static void select_patch( 422 int which, int front, int back, int size, int* start, int* end) 423{ 424 switch (which) { 425 case 0: 426 *start = 0; 427 *end = front-1; 428 break; 429 case 1: 430 *start = front; 431 *end = back-1; 432 break; 433 case 2: 434 *start = back; 435 *end = size-1; 436 break; 437 } 438} 439 440static uint32_t get_color(image_info* image, int hpatch, int vpatch) 441{ 442 int left, right, top, bottom; 443 select_patch( 444 hpatch, image->xDivs[0], image->xDivs[1], 445 image->width, &left, &right); 446 select_patch( 447 vpatch, image->yDivs[0], image->yDivs[1], 448 image->height, &top, &bottom); 449 //printf("Selecting h=%d v=%d: (%d,%d)-(%d,%d)\n", 450 // hpatch, vpatch, left, top, right, bottom); 451 const uint32_t c = get_color(image->rows, left, top, right, bottom); 452 NOISY(printf("Color in (%d,%d)-(%d,%d): #%08x\n", left, top, right, bottom, c)); 453 return c; 454} 455 456static status_t do_9patch(const char* imageName, image_info* image) 457{ 458 image->is9Patch = true; 459 460 int W = image->width; 461 int H = image->height; 462 int i, j; 463 464 int maxSizeXDivs = W * sizeof(int32_t); 465 int maxSizeYDivs = H * sizeof(int32_t); 466 int32_t* xDivs = image->xDivs = (int32_t*) malloc(maxSizeXDivs); 467 int32_t* yDivs = image->yDivs = (int32_t*) malloc(maxSizeYDivs); 468 uint8_t numXDivs = 0; 469 uint8_t numYDivs = 0; 470 471 int8_t numColors; 472 int numRows; 473 int numCols; 474 int top; 475 int left; 476 int right; 477 int bottom; 478 memset(xDivs, -1, maxSizeXDivs); 479 memset(yDivs, -1, maxSizeYDivs); 480 image->info9Patch.paddingLeft = image->info9Patch.paddingRight = 481 image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; 482 483 image->layoutBoundsLeft = image->layoutBoundsRight = 484 image->layoutBoundsTop = image->layoutBoundsBottom = 0; 485 486 png_bytep p = image->rows[0]; 487 bool transparent = p[3] == 0; 488 bool hasColor = false; 489 490 const char* errorMsg = NULL; 491 int errorPixel = -1; 492 const char* errorEdge = NULL; 493 494 int colorIndex = 0; 495 496 // Validate size... 497 if (W < 3 || H < 3) { 498 errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; 499 goto getout; 500 } 501 502 // Validate frame... 503 if (!transparent && 504 (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { 505 errorMsg = "Must have one-pixel frame that is either transparent or white"; 506 goto getout; 507 } 508 509 // Find left and right of sizing areas... 510 if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], 511 &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { 512 errorPixel = xDivs[0]; 513 errorEdge = "top"; 514 goto getout; 515 } 516 517 // Find top and bottom of sizing areas... 518 if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], 519 &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { 520 errorPixel = yDivs[0]; 521 errorEdge = "left"; 522 goto getout; 523 } 524 525 // Copy patch size data into image... 526 image->info9Patch.numXDivs = numXDivs; 527 image->info9Patch.numYDivs = numYDivs; 528 529 // Find left and right of padding area... 530 if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, 531 &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { 532 errorPixel = image->info9Patch.paddingLeft; 533 errorEdge = "bottom"; 534 goto getout; 535 } 536 537 // Find top and bottom of padding area... 538 if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, 539 &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { 540 errorPixel = image->info9Patch.paddingTop; 541 errorEdge = "right"; 542 goto getout; 543 } 544 545 // Find left and right of layout padding... 546 get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, 547 &image->layoutBoundsLeft, 548 &image->layoutBoundsRight, &errorMsg); 549 550 get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, 551 &image->layoutBoundsTop, 552 &image->layoutBoundsBottom, &errorMsg); 553 554 image->haveLayoutBounds = image->layoutBoundsLeft != 0 555 || image->layoutBoundsRight != 0 556 || image->layoutBoundsTop != 0 557 || image->layoutBoundsBottom != 0; 558 559 if (image->haveLayoutBounds) { 560 NOISY(printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, 561 image->layoutBoundsRight, image->layoutBoundsBottom)); 562 } 563 564 // If padding is not yet specified, take values from size. 565 if (image->info9Patch.paddingLeft < 0) { 566 image->info9Patch.paddingLeft = xDivs[0]; 567 image->info9Patch.paddingRight = W - 2 - xDivs[1]; 568 } else { 569 // Adjust value to be correct! 570 image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; 571 } 572 if (image->info9Patch.paddingTop < 0) { 573 image->info9Patch.paddingTop = yDivs[0]; 574 image->info9Patch.paddingBottom = H - 2 - yDivs[1]; 575 } else { 576 // Adjust value to be correct! 577 image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; 578 } 579 580 NOISY(printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, 581 image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], 582 image->info9Patch.yDivs[0], image->info9Patch.yDivs[1])); 583 NOISY(printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, 584 image->info9Patch.paddingLeft, image->info9Patch.paddingRight, 585 image->info9Patch.paddingTop, image->info9Patch.paddingBottom)); 586 587 // Remove frame from image. 588 image->rows = (png_bytepp)malloc((H-2) * sizeof(png_bytep)); 589 for (i=0; i<(H-2); i++) { 590 image->rows[i] = image->allocRows[i+1]; 591 memmove(image->rows[i], image->rows[i]+4, (W-2)*4); 592 } 593 image->width -= 2; 594 W = image->width; 595 image->height -= 2; 596 H = image->height; 597 598 // Figure out the number of rows and columns in the N-patch 599 numCols = numXDivs + 1; 600 if (xDivs[0] == 0) { // Column 1 is strechable 601 numCols--; 602 } 603 if (xDivs[numXDivs - 1] == W) { 604 numCols--; 605 } 606 numRows = numYDivs + 1; 607 if (yDivs[0] == 0) { // Row 1 is strechable 608 numRows--; 609 } 610 if (yDivs[numYDivs - 1] == H) { 611 numRows--; 612 } 613 614 // Make sure the amount of rows and columns will fit in the number of 615 // colors we can use in the 9-patch format. 616 if (numRows * numCols > 0x7F) { 617 errorMsg = "Too many rows and columns in 9-patch perimeter"; 618 goto getout; 619 } 620 621 numColors = numRows * numCols; 622 image->info9Patch.numColors = numColors; 623 image->colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); 624 625 // Fill in color information for each patch. 626 627 uint32_t c; 628 top = 0; 629 630 // The first row always starts with the top being at y=0 and the bottom 631 // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case 632 // the first row is stretchable along the Y axis, otherwise it is fixed. 633 // The last row always ends with the bottom being bitmap.height and the top 634 // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or 635 // yDivs[numYDivs-1]. In the former case the last row is stretchable along 636 // the Y axis, otherwise it is fixed. 637 // 638 // The first and last columns are similarly treated with respect to the X 639 // axis. 640 // 641 // The above is to help explain some of the special casing that goes on the 642 // code below. 643 644 // The initial yDiv and whether the first row is considered stretchable or 645 // not depends on whether yDiv[0] was zero or not. 646 for (j = (yDivs[0] == 0 ? 1 : 0); 647 j <= numYDivs && top < H; 648 j++) { 649 if (j == numYDivs) { 650 bottom = H; 651 } else { 652 bottom = yDivs[j]; 653 } 654 left = 0; 655 // The initial xDiv and whether the first column is considered 656 // stretchable or not depends on whether xDiv[0] was zero or not. 657 for (i = xDivs[0] == 0 ? 1 : 0; 658 i <= numXDivs && left < W; 659 i++) { 660 if (i == numXDivs) { 661 right = W; 662 } else { 663 right = xDivs[i]; 664 } 665 c = get_color(image->rows, left, top, right - 1, bottom - 1); 666 image->colors[colorIndex++] = c; 667 NOISY(if (c != Res_png_9patch::NO_COLOR) hasColor = true); 668 left = right; 669 } 670 top = bottom; 671 } 672 673 assert(colorIndex == numColors); 674 675 for (i=0; i<numColors; i++) { 676 if (hasColor) { 677 if (i == 0) printf("Colors in %s:\n ", imageName); 678 printf(" #%08x", image->colors[i]); 679 if (i == numColors - 1) printf("\n"); 680 } 681 } 682getout: 683 if (errorMsg) { 684 fprintf(stderr, 685 "ERROR: 9-patch image %s malformed.\n" 686 " %s.\n", imageName, errorMsg); 687 if (errorEdge != NULL) { 688 if (errorPixel >= 0) { 689 fprintf(stderr, 690 " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); 691 } else { 692 fprintf(stderr, 693 " Found along %s edge.\n", errorEdge); 694 } 695 } 696 return UNKNOWN_ERROR; 697 } 698 return NO_ERROR; 699} 700 701static void checkNinePatchSerialization(Res_png_9patch* inPatch, void* data) 702{ 703 size_t patchSize = inPatch->serializedSize(); 704 void* newData = malloc(patchSize); 705 memcpy(newData, data, patchSize); 706 Res_png_9patch* outPatch = inPatch->deserialize(newData); 707 // deserialization is done in place, so outPatch == newData 708 assert(outPatch == newData); 709 assert(outPatch->numXDivs == inPatch->numXDivs); 710 assert(outPatch->numYDivs == inPatch->numYDivs); 711 assert(outPatch->paddingLeft == inPatch->paddingLeft); 712 assert(outPatch->paddingRight == inPatch->paddingRight); 713 assert(outPatch->paddingTop == inPatch->paddingTop); 714 assert(outPatch->paddingBottom == inPatch->paddingBottom); 715 for (int i = 0; i < outPatch->numXDivs; i++) { 716 assert(outPatch->xDivs[i] == inPatch->xDivs[i]); 717 } 718 for (int i = 0; i < outPatch->numYDivs; i++) { 719 assert(outPatch->yDivs[i] == inPatch->yDivs[i]); 720 } 721 for (int i = 0; i < outPatch->numColors; i++) { 722 assert(outPatch->colors[i] == inPatch->colors[i]); 723 } 724 free(newData); 725} 726 727static void dump_image(int w, int h, png_bytepp rows, int color_type) 728{ 729 int i, j, rr, gg, bb, aa; 730 731 int bpp; 732 if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { 733 bpp = 1; 734 } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { 735 bpp = 2; 736 } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 737 // We use a padding byte even when there is no alpha 738 bpp = 4; 739 } else { 740 printf("Unknown color type %d.\n", color_type); 741 } 742 743 for (j = 0; j < h; j++) { 744 png_bytep row = rows[j]; 745 for (i = 0; i < w; i++) { 746 rr = row[0]; 747 gg = row[1]; 748 bb = row[2]; 749 aa = row[3]; 750 row += bpp; 751 752 if (i == 0) { 753 printf("Row %d:", j); 754 } 755 switch (bpp) { 756 case 1: 757 printf(" (%d)", rr); 758 break; 759 case 2: 760 printf(" (%d %d", rr, gg); 761 break; 762 case 3: 763 printf(" (%d %d %d)", rr, gg, bb); 764 break; 765 case 4: 766 printf(" (%d %d %d %d)", rr, gg, bb, aa); 767 break; 768 } 769 if (i == (w - 1)) { 770 NOISY(printf("\n")); 771 } 772 } 773 } 774} 775 776#define MAX(a,b) ((a)>(b)?(a):(b)) 777#define ABS(a) ((a)<0?-(a):(a)) 778 779static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, 780 png_colorp rgbPalette, png_bytep alphaPalette, 781 int *paletteEntries, bool *hasTransparency, int *colorType, 782 png_bytepp outRows) 783{ 784 int w = imageInfo.width; 785 int h = imageInfo.height; 786 int i, j, rr, gg, bb, aa, idx; 787 uint32_t colors[256], col; 788 int num_colors = 0; 789 int maxGrayDeviation = 0; 790 791 bool isOpaque = true; 792 bool isPalette = true; 793 bool isGrayscale = true; 794 795 // Scan the entire image and determine if: 796 // 1. Every pixel has R == G == B (grayscale) 797 // 2. Every pixel has A == 255 (opaque) 798 // 3. There are no more than 256 distinct RGBA colors 799 800 // NOISY(printf("Initial image data:\n")); 801 // dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); 802 803 for (j = 0; j < h; j++) { 804 png_bytep row = imageInfo.rows[j]; 805 png_bytep out = outRows[j]; 806 for (i = 0; i < w; i++) { 807 rr = *row++; 808 gg = *row++; 809 bb = *row++; 810 aa = *row++; 811 812 int odev = maxGrayDeviation; 813 maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); 814 maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); 815 maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); 816 if (maxGrayDeviation > odev) { 817 NOISY(printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", 818 maxGrayDeviation, i, j, rr, gg, bb, aa)); 819 } 820 821 // Check if image is really grayscale 822 if (isGrayscale) { 823 if (rr != gg || rr != bb) { 824 NOISY(printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", 825 i, j, rr, gg, bb, aa)); 826 isGrayscale = false; 827 } 828 } 829 830 // Check if image is really opaque 831 if (isOpaque) { 832 if (aa != 0xff) { 833 NOISY(printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", 834 i, j, rr, gg, bb, aa)); 835 isOpaque = false; 836 } 837 } 838 839 // Check if image is really <= 256 colors 840 if (isPalette) { 841 col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); 842 bool match = false; 843 for (idx = 0; idx < num_colors; idx++) { 844 if (colors[idx] == col) { 845 match = true; 846 break; 847 } 848 } 849 850 // Write the palette index for the pixel to outRows optimistically 851 // We might overwrite it later if we decide to encode as gray or 852 // gray + alpha 853 *out++ = idx; 854 if (!match) { 855 if (num_colors == 256) { 856 NOISY(printf("Found 257th color at %d, %d\n", i, j)); 857 isPalette = false; 858 } else { 859 colors[num_colors++] = col; 860 } 861 } 862 } 863 } 864 } 865 866 *paletteEntries = 0; 867 *hasTransparency = !isOpaque; 868 int bpp = isOpaque ? 3 : 4; 869 int paletteSize = w * h + bpp * num_colors; 870 871 NOISY(printf("isGrayscale = %s\n", isGrayscale ? "true" : "false")); 872 NOISY(printf("isOpaque = %s\n", isOpaque ? "true" : "false")); 873 NOISY(printf("isPalette = %s\n", isPalette ? "true" : "false")); 874 NOISY(printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", 875 paletteSize, 2 * w * h, bpp * w * h)); 876 NOISY(printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance)); 877 878 // Choose the best color type for the image. 879 // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel 880 // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations 881 // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA 882 // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently 883 // small, otherwise use COLOR_TYPE_RGB{_ALPHA} 884 if (isGrayscale) { 885 if (isOpaque) { 886 *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel 887 } else { 888 // Use a simple heuristic to determine whether using a palette will 889 // save space versus using gray + alpha for each pixel. 890 // This doesn't take into account chunk overhead, filtering, LZ 891 // compression, etc. 892 if (isPalette && (paletteSize < 2 * w * h)) { 893 *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color 894 } else { 895 *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel 896 } 897 } 898 } else if (isPalette && (paletteSize < bpp * w * h)) { 899 *colorType = PNG_COLOR_TYPE_PALETTE; 900 } else { 901 if (maxGrayDeviation <= grayscaleTolerance) { 902 printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); 903 *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; 904 } else { 905 *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; 906 } 907 } 908 909 // Perform postprocessing of the image or palette data based on the final 910 // color type chosen 911 912 if (*colorType == PNG_COLOR_TYPE_PALETTE) { 913 // Create separate RGB and Alpha palettes and set the number of colors 914 *paletteEntries = num_colors; 915 916 // Create the RGB and alpha palettes 917 for (int idx = 0; idx < num_colors; idx++) { 918 col = colors[idx]; 919 rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); 920 rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); 921 rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); 922 alphaPalette[idx] = (png_byte) (col & 0xff); 923 } 924 } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { 925 // If the image is gray or gray + alpha, compact the pixels into outRows 926 for (j = 0; j < h; j++) { 927 png_bytep row = imageInfo.rows[j]; 928 png_bytep out = outRows[j]; 929 for (i = 0; i < w; i++) { 930 rr = *row++; 931 gg = *row++; 932 bb = *row++; 933 aa = *row++; 934 935 if (isGrayscale) { 936 *out++ = rr; 937 } else { 938 *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); 939 } 940 if (!isOpaque) { 941 *out++ = aa; 942 } 943 } 944 } 945 } 946} 947 948 949static void write_png(const char* imageName, 950 png_structp write_ptr, png_infop write_info, 951 image_info& imageInfo, int grayscaleTolerance) 952{ 953 bool optimize = true; 954 png_uint_32 width, height; 955 int color_type; 956 int bit_depth, interlace_type, compression_type; 957 int i; 958 959 png_unknown_chunk unknowns[2]; 960 unknowns[0].data = NULL; 961 unknowns[1].data = NULL; 962 963 png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * sizeof(png_bytep)); 964 if (outRows == (png_bytepp) 0) { 965 printf("Can't allocate output buffer!\n"); 966 exit(1); 967 } 968 for (i = 0; i < (int) imageInfo.height; i++) { 969 outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); 970 if (outRows[i] == (png_bytep) 0) { 971 printf("Can't allocate output buffer!\n"); 972 exit(1); 973 } 974 } 975 976 png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); 977 978 NOISY(printf("Writing image %s: w = %d, h = %d\n", imageName, 979 (int) imageInfo.width, (int) imageInfo.height)); 980 981 png_color rgbPalette[256]; 982 png_byte alphaPalette[256]; 983 bool hasTransparency; 984 int paletteEntries; 985 986 analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, 987 &paletteEntries, &hasTransparency, &color_type, outRows); 988 989 // If the image is a 9-patch, we need to preserve it as a ARGB file to make 990 // sure the pixels will not be pre-dithered/clamped until we decide they are 991 if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || 992 color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { 993 color_type = PNG_COLOR_TYPE_RGB_ALPHA; 994 } 995 996 switch (color_type) { 997 case PNG_COLOR_TYPE_PALETTE: 998 NOISY(printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", 999 imageName, paletteEntries, 1000 hasTransparency ? " (with alpha)" : "")); 1001 break; 1002 case PNG_COLOR_TYPE_GRAY: 1003 NOISY(printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName)); 1004 break; 1005 case PNG_COLOR_TYPE_GRAY_ALPHA: 1006 NOISY(printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName)); 1007 break; 1008 case PNG_COLOR_TYPE_RGB: 1009 NOISY(printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName)); 1010 break; 1011 case PNG_COLOR_TYPE_RGB_ALPHA: 1012 NOISY(printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName)); 1013 break; 1014 } 1015 1016 png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, 1017 8, color_type, PNG_INTERLACE_NONE, 1018 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); 1019 1020 if (color_type == PNG_COLOR_TYPE_PALETTE) { 1021 png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); 1022 if (hasTransparency) { 1023 png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); 1024 } 1025 png_set_filter(write_ptr, 0, PNG_NO_FILTERS); 1026 } else { 1027 png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); 1028 } 1029 1030 if (imageInfo.is9Patch) { 1031 int chunk_count = 1 + (imageInfo.haveLayoutBounds ? 1 : 0); 1032 int p_index = imageInfo.haveLayoutBounds ? 1 : 0; 1033 int b_index = 0; 1034 png_byte *chunk_names = imageInfo.haveLayoutBounds 1035 ? (png_byte*)"npLb\0npTc\0" 1036 : (png_byte*)"npTc"; 1037 NOISY(printf("Adding 9-patch info...\n")); 1038 strcpy((char*)unknowns[p_index].name, "npTc"); 1039 unknowns[p_index].data = (png_byte*)imageInfo.serialize9patch(); 1040 unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); 1041 // TODO: remove the check below when everything works 1042 checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); 1043 1044 if (imageInfo.haveLayoutBounds) { 1045 int chunk_size = sizeof(png_uint_32) * 4; 1046 strcpy((char*)unknowns[b_index].name, "npLb"); 1047 unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); 1048 memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); 1049 unknowns[b_index].size = chunk_size; 1050 } 1051 1052 for (int i = 0; i < chunk_count; i++) { 1053 unknowns[i].location = PNG_HAVE_PLTE; 1054 } 1055 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1056 chunk_names, chunk_count); 1057 png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); 1058#if PNG_LIBPNG_VER < 10600 1059 /* Deal with unknown chunk location bug in 1.5.x and earlier */ 1060 png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); 1061 if (imageInfo.haveLayoutBounds) { 1062 png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); 1063 } 1064#endif 1065 } 1066 1067 1068 png_write_info(write_ptr, write_info); 1069 1070 png_bytepp rows; 1071 if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 1072 if (color_type == PNG_COLOR_TYPE_RGB) { 1073 png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); 1074 } 1075 rows = imageInfo.rows; 1076 } else { 1077 rows = outRows; 1078 } 1079 png_write_image(write_ptr, rows); 1080 1081// NOISY(printf("Final image data:\n")); 1082// dump_image(imageInfo.width, imageInfo.height, rows, color_type); 1083 1084 png_write_end(write_ptr, write_info); 1085 1086 for (i = 0; i < (int) imageInfo.height; i++) { 1087 free(outRows[i]); 1088 } 1089 free(outRows); 1090 free(unknowns[0].data); 1091 free(unknowns[1].data); 1092 1093 png_get_IHDR(write_ptr, write_info, &width, &height, 1094 &bit_depth, &color_type, &interlace_type, 1095 &compression_type, NULL); 1096 1097 NOISY(printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 1098 (int)width, (int)height, bit_depth, color_type, interlace_type, 1099 compression_type)); 1100} 1101 1102status_t preProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1103 const sp<AaptFile>& file, String8* outNewLeafName) 1104{ 1105 String8 ext(file->getPath().getPathExtension()); 1106 1107 // We currently only process PNG images. 1108 if (strcmp(ext.string(), ".png") != 0) { 1109 return NO_ERROR; 1110 } 1111 1112 // Example of renaming a file: 1113 //*outNewLeafName = file->getPath().getBasePath().getFileName(); 1114 //outNewLeafName->append(".nupng"); 1115 1116 String8 printableName(file->getPrintableSource()); 1117 1118 if (bundle->getVerbose()) { 1119 printf("Processing image: %s\n", printableName.string()); 1120 } 1121 1122 png_structp read_ptr = NULL; 1123 png_infop read_info = NULL; 1124 FILE* fp; 1125 1126 image_info imageInfo; 1127 1128 png_structp write_ptr = NULL; 1129 png_infop write_info = NULL; 1130 1131 status_t error = UNKNOWN_ERROR; 1132 1133 const size_t nameLen = file->getPath().length(); 1134 1135 fp = fopen(file->getSourceFile().string(), "rb"); 1136 if (fp == NULL) { 1137 fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); 1138 goto bail; 1139 } 1140 1141 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1142 (png_error_ptr)NULL); 1143 if (!read_ptr) { 1144 goto bail; 1145 } 1146 1147 read_info = png_create_info_struct(read_ptr); 1148 if (!read_info) { 1149 goto bail; 1150 } 1151 1152 if (setjmp(png_jmpbuf(read_ptr))) { 1153 goto bail; 1154 } 1155 1156 png_init_io(read_ptr, fp); 1157 1158 read_png(printableName.string(), read_ptr, read_info, &imageInfo); 1159 1160 if (nameLen > 6) { 1161 const char* name = file->getPath().string(); 1162 if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { 1163 if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { 1164 goto bail; 1165 } 1166 } 1167 } 1168 1169 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1170 (png_error_ptr)NULL); 1171 if (!write_ptr) 1172 { 1173 goto bail; 1174 } 1175 1176 write_info = png_create_info_struct(write_ptr); 1177 if (!write_info) 1178 { 1179 goto bail; 1180 } 1181 1182 png_set_write_fn(write_ptr, (void*)file.get(), 1183 png_write_aapt_file, png_flush_aapt_file); 1184 1185 if (setjmp(png_jmpbuf(write_ptr))) 1186 { 1187 goto bail; 1188 } 1189 1190 write_png(printableName.string(), write_ptr, write_info, imageInfo, 1191 bundle->getGrayscaleTolerance()); 1192 1193 error = NO_ERROR; 1194 1195 if (bundle->getVerbose()) { 1196 fseek(fp, 0, SEEK_END); 1197 size_t oldSize = (size_t)ftell(fp); 1198 size_t newSize = file->getSize(); 1199 float factor = ((float)newSize)/oldSize; 1200 int percent = (int)(factor*100); 1201 printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); 1202 } 1203 1204bail: 1205 if (read_ptr) { 1206 png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); 1207 } 1208 if (fp) { 1209 fclose(fp); 1210 } 1211 if (write_ptr) { 1212 png_destroy_write_struct(&write_ptr, &write_info); 1213 } 1214 1215 if (error != NO_ERROR) { 1216 fprintf(stderr, "ERROR: Failure processing PNG image %s\n", 1217 file->getPrintableSource().string()); 1218 } 1219 return error; 1220} 1221 1222status_t preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) 1223{ 1224 png_structp read_ptr = NULL; 1225 png_infop read_info = NULL; 1226 1227 FILE* fp; 1228 1229 image_info imageInfo; 1230 1231 png_structp write_ptr = NULL; 1232 png_infop write_info = NULL; 1233 1234 status_t error = UNKNOWN_ERROR; 1235 1236 if (bundle->getVerbose()) { 1237 printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); 1238 } 1239 1240 // Get a file handler to read from 1241 fp = fopen(source.string(),"rb"); 1242 if (fp == NULL) { 1243 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); 1244 return error; 1245 } 1246 1247 // Call libpng to get a struct to read image data into 1248 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1249 if (!read_ptr) { 1250 fclose(fp); 1251 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1252 return error; 1253 } 1254 1255 // Call libpng to get a struct to read image info into 1256 read_info = png_create_info_struct(read_ptr); 1257 if (!read_info) { 1258 fclose(fp); 1259 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1260 return error; 1261 } 1262 1263 // Set a jump point for libpng to long jump back to on error 1264 if (setjmp(png_jmpbuf(read_ptr))) { 1265 fclose(fp); 1266 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1267 return error; 1268 } 1269 1270 // Set up libpng to read from our file. 1271 png_init_io(read_ptr,fp); 1272 1273 // Actually read data from the file 1274 read_png(source.string(), read_ptr, read_info, &imageInfo); 1275 1276 // We're done reading so we can clean up 1277 // Find old file size before releasing handle 1278 fseek(fp, 0, SEEK_END); 1279 size_t oldSize = (size_t)ftell(fp); 1280 fclose(fp); 1281 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1282 1283 // Check to see if we're dealing with a 9-patch 1284 // If we are, process appropriately 1285 if (source.getBasePath().getPathExtension() == ".9") { 1286 if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { 1287 return error; 1288 } 1289 } 1290 1291 // Call libpng to create a structure to hold the processed image data 1292 // that can be written to disk 1293 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1294 if (!write_ptr) { 1295 png_destroy_write_struct(&write_ptr, &write_info); 1296 return error; 1297 } 1298 1299 // Call libpng to create a structure to hold processed image info that can 1300 // be written to disk 1301 write_info = png_create_info_struct(write_ptr); 1302 if (!write_info) { 1303 png_destroy_write_struct(&write_ptr, &write_info); 1304 return error; 1305 } 1306 1307 // Open up our destination file for writing 1308 fp = fopen(dest.string(), "wb"); 1309 if (!fp) { 1310 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); 1311 png_destroy_write_struct(&write_ptr, &write_info); 1312 return error; 1313 } 1314 1315 // Set up libpng to write to our file 1316 png_init_io(write_ptr, fp); 1317 1318 // Set up a jump for libpng to long jump back on on errors 1319 if (setjmp(png_jmpbuf(write_ptr))) { 1320 fclose(fp); 1321 png_destroy_write_struct(&write_ptr, &write_info); 1322 return error; 1323 } 1324 1325 // Actually write out to the new png 1326 write_png(dest.string(), write_ptr, write_info, imageInfo, 1327 bundle->getGrayscaleTolerance()); 1328 1329 if (bundle->getVerbose()) { 1330 // Find the size of our new file 1331 FILE* reader = fopen(dest.string(), "rb"); 1332 fseek(reader, 0, SEEK_END); 1333 size_t newSize = (size_t)ftell(reader); 1334 fclose(reader); 1335 1336 float factor = ((float)newSize)/oldSize; 1337 int percent = (int)(factor*100); 1338 printf(" (processed image to cache entry %s: %d%% size of source)\n", 1339 dest.string(), percent); 1340 } 1341 1342 //Clean up 1343 fclose(fp); 1344 png_destroy_write_struct(&write_ptr, &write_info); 1345 1346 return NO_ERROR; 1347} 1348 1349status_t postProcessImage(const sp<AaptAssets>& assets, 1350 ResourceTable* table, const sp<AaptFile>& file) 1351{ 1352 String8 ext(file->getPath().getPathExtension()); 1353 1354 // At this point, now that we have all the resource data, all we need to 1355 // do is compile XML files. 1356 if (strcmp(ext.string(), ".xml") == 0) { 1357 return compileXmlFile(assets, file, table); 1358 } 1359 1360 return NO_ERROR; 1361} 1362