Images.cpp revision c367d48c55e5a3fa0df14fd62889e4bb6b63cb01
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), allocRows(NULL) { } 39 ~image_info() { 40 if (rows && rows != allocRows) { 41 free(rows); 42 } 43 if (allocRows) { 44 for (int i=0; i<(int)allocHeight; i++) { 45 free(allocRows[i]); 46 } 47 free(allocRows); 48 } 49 free(info9Patch.xDivs); 50 free(info9Patch.yDivs); 51 free(info9Patch.colors); 52 } 53 54 png_uint_32 width; 55 png_uint_32 height; 56 png_bytepp rows; 57 58 // 9-patch info. 59 bool is9Patch; 60 Res_png_9patch info9Patch; 61 62 // Layout padding, if relevant 63 bool haveLayoutBounds; 64 int32_t layoutBoundsLeft; 65 int32_t layoutBoundsTop; 66 int32_t layoutBoundsRight; 67 int32_t layoutBoundsBottom; 68 69 png_uint_32 allocHeight; 70 png_bytepp allocRows; 71}; 72 73static void read_png(const char* imageName, 74 png_structp read_ptr, png_infop read_info, 75 image_info* outImageInfo) 76{ 77 int color_type; 78 int bit_depth, interlace_type, compression_type; 79 int i; 80 81 png_read_info(read_ptr, read_info); 82 83 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 84 &outImageInfo->height, &bit_depth, &color_type, 85 &interlace_type, &compression_type, NULL); 86 87 //printf("Image %s:\n", imageName); 88 //printf("color_type=%d, bit_depth=%d, interlace_type=%d, compression_type=%d\n", 89 // color_type, bit_depth, interlace_type, compression_type); 90 91 if (color_type == PNG_COLOR_TYPE_PALETTE) 92 png_set_palette_to_rgb(read_ptr); 93 94 if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) 95 png_set_expand_gray_1_2_4_to_8(read_ptr); 96 97 if (png_get_valid(read_ptr, read_info, PNG_INFO_tRNS)) { 98 //printf("Has PNG_INFO_tRNS!\n"); 99 png_set_tRNS_to_alpha(read_ptr); 100 } 101 102 if (bit_depth == 16) 103 png_set_strip_16(read_ptr); 104 105 if ((color_type&PNG_COLOR_MASK_ALPHA) == 0) 106 png_set_add_alpha(read_ptr, 0xFF, PNG_FILLER_AFTER); 107 108 if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) 109 png_set_gray_to_rgb(read_ptr); 110 111 png_read_update_info(read_ptr, read_info); 112 113 outImageInfo->rows = (png_bytepp)malloc( 114 outImageInfo->height * sizeof(png_bytep)); 115 outImageInfo->allocHeight = outImageInfo->height; 116 outImageInfo->allocRows = outImageInfo->rows; 117 118 png_set_rows(read_ptr, read_info, outImageInfo->rows); 119 120 for (i = 0; i < (int)outImageInfo->height; i++) 121 { 122 outImageInfo->rows[i] = (png_bytep) 123 malloc(png_get_rowbytes(read_ptr, read_info)); 124 } 125 126 png_read_image(read_ptr, outImageInfo->rows); 127 128 png_read_end(read_ptr, read_info); 129 130 NOISY(printf("Image %s: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 131 imageName, 132 (int)outImageInfo->width, (int)outImageInfo->height, 133 bit_depth, color_type, 134 interlace_type, compression_type)); 135 136 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 137 &outImageInfo->height, &bit_depth, &color_type, 138 &interlace_type, &compression_type, NULL); 139} 140 141#define COLOR_TRANSPARENT 0 142#define COLOR_WHITE 0xFFFFFFFF 143#define COLOR_TICK 0xFF000000 144#define COLOR_LAYOUT_BOUNDS_TICK 0xFF0000FF 145 146enum { 147 TICK_TYPE_NONE, 148 TICK_TYPE_TICK, 149 TICK_TYPE_LAYOUT_BOUNDS, 150 TICK_TYPE_BOTH 151}; 152 153static int tick_type(png_bytep p, bool transparent, const char** outError) 154{ 155 png_uint_32 color = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); 156 157 if (transparent) { 158 if (p[3] == 0) { 159 return TICK_TYPE_NONE; 160 } 161 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 162 return TICK_TYPE_LAYOUT_BOUNDS; 163 } 164 if (color == COLOR_TICK) { 165 return TICK_TYPE_TICK; 166 } 167 168 // Error cases 169 if (p[3] != 0xff) { 170 *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)"; 171 return TICK_TYPE_NONE; 172 } 173 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 174 *outError = "Ticks in transparent frame must be black or red"; 175 } 176 return TICK_TYPE_TICK; 177 } 178 179 if (p[3] != 0xFF) { 180 *outError = "White frame must be a solid color (no alpha)"; 181 } 182 if (color == COLOR_WHITE) { 183 return TICK_TYPE_NONE; 184 } 185 if (color == COLOR_TICK) { 186 return TICK_TYPE_TICK; 187 } 188 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 189 return TICK_TYPE_LAYOUT_BOUNDS; 190 } 191 192 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 193 *outError = "Ticks in white frame must be black or red"; 194 return TICK_TYPE_NONE; 195 } 196 return TICK_TYPE_TICK; 197} 198 199enum { 200 TICK_START, 201 TICK_INSIDE_1, 202 TICK_OUTSIDE_1 203}; 204 205static status_t get_horizontal_ticks( 206 png_bytep row, int width, bool transparent, bool required, 207 int32_t* outLeft, int32_t* outRight, const char** outError, 208 uint8_t* outDivs, bool multipleAllowed) 209{ 210 int i; 211 *outLeft = *outRight = -1; 212 int state = TICK_START; 213 bool found = false; 214 215 for (i=1; i<width-1; i++) { 216 if (TICK_TYPE_TICK == tick_type(row+i*4, transparent, outError)) { 217 if (state == TICK_START || 218 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 219 *outLeft = i-1; 220 *outRight = width-2; 221 found = true; 222 if (outDivs != NULL) { 223 *outDivs += 2; 224 } 225 state = TICK_INSIDE_1; 226 } else if (state == TICK_OUTSIDE_1) { 227 *outError = "Can't have more than one marked region along edge"; 228 *outLeft = i; 229 return UNKNOWN_ERROR; 230 } 231 } else if (*outError == NULL) { 232 if (state == TICK_INSIDE_1) { 233 // We're done with this div. Move on to the next. 234 *outRight = i-1; 235 outRight += 2; 236 outLeft += 2; 237 state = TICK_OUTSIDE_1; 238 } 239 } else { 240 *outLeft = i; 241 return UNKNOWN_ERROR; 242 } 243 } 244 245 if (required && !found) { 246 *outError = "No marked region found along edge"; 247 *outLeft = -1; 248 return UNKNOWN_ERROR; 249 } 250 251 return NO_ERROR; 252} 253 254static status_t get_vertical_ticks( 255 png_bytepp rows, int offset, int height, bool transparent, bool required, 256 int32_t* outTop, int32_t* outBottom, const char** outError, 257 uint8_t* outDivs, bool multipleAllowed) 258{ 259 int i; 260 *outTop = *outBottom = -1; 261 int state = TICK_START; 262 bool found = false; 263 264 for (i=1; i<height-1; i++) { 265 if (TICK_TYPE_TICK == tick_type(rows[i]+offset, transparent, outError)) { 266 if (state == TICK_START || 267 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 268 *outTop = i-1; 269 *outBottom = height-2; 270 found = true; 271 if (outDivs != NULL) { 272 *outDivs += 2; 273 } 274 state = TICK_INSIDE_1; 275 } else if (state == TICK_OUTSIDE_1) { 276 *outError = "Can't have more than one marked region along edge"; 277 *outTop = i; 278 return UNKNOWN_ERROR; 279 } 280 } else if (*outError == NULL) { 281 if (state == TICK_INSIDE_1) { 282 // We're done with this div. Move on to the next. 283 *outBottom = i-1; 284 outTop += 2; 285 outBottom += 2; 286 state = TICK_OUTSIDE_1; 287 } 288 } else { 289 *outTop = i; 290 return UNKNOWN_ERROR; 291 } 292 } 293 294 if (required && !found) { 295 *outError = "No marked region found along edge"; 296 *outTop = -1; 297 return UNKNOWN_ERROR; 298 } 299 300 return NO_ERROR; 301} 302 303static status_t get_horizontal_layout_bounds_ticks( 304 png_bytep row, int width, bool transparent, bool required, 305 int32_t* outLeft, int32_t* outRight, const char** outError) 306{ 307 int i; 308 *outLeft = *outRight = 0; 309 310 // Look for left tick 311 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + 4, transparent, outError)) { 312 // Starting with a layout padding tick 313 i = 1; 314 while (i < width - 1) { 315 (*outLeft)++; 316 i++; 317 int tick = tick_type(row + i * 4, transparent, outError); 318 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 319 break; 320 } 321 } 322 } 323 324 // Look for right tick 325 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + (width - 2) * 4, transparent, outError)) { 326 // Ending with a layout padding tick 327 i = width - 2; 328 while (i > 1) { 329 (*outRight)++; 330 i--; 331 int tick = tick_type(row+i*4, transparent, outError); 332 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 333 break; 334 } 335 } 336 } 337 338 return NO_ERROR; 339} 340 341static status_t get_vertical_layout_bounds_ticks( 342 png_bytepp rows, int offset, int height, bool transparent, bool required, 343 int32_t* outTop, int32_t* outBottom, const char** outError) 344{ 345 int i; 346 *outTop = *outBottom = 0; 347 348 // Look for top tick 349 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[1] + offset, transparent, outError)) { 350 // Starting with a layout padding tick 351 i = 1; 352 while (i < height - 1) { 353 (*outTop)++; 354 i++; 355 int tick = tick_type(rows[i] + offset, transparent, outError); 356 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 357 break; 358 } 359 } 360 } 361 362 // Look for bottom tick 363 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[height - 2] + offset, transparent, outError)) { 364 // Ending with a layout padding tick 365 i = height - 2; 366 while (i > 1) { 367 (*outBottom)++; 368 i--; 369 int tick = tick_type(rows[i] + offset, transparent, outError); 370 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 371 break; 372 } 373 } 374 } 375 376 return NO_ERROR; 377} 378 379 380static uint32_t get_color( 381 png_bytepp rows, int left, int top, int right, int bottom) 382{ 383 png_bytep color = rows[top] + left*4; 384 385 if (left > right || top > bottom) { 386 return Res_png_9patch::TRANSPARENT_COLOR; 387 } 388 389 while (top <= bottom) { 390 for (int i = left; i <= right; i++) { 391 png_bytep p = rows[top]+i*4; 392 if (color[3] == 0) { 393 if (p[3] != 0) { 394 return Res_png_9patch::NO_COLOR; 395 } 396 } else if (p[0] != color[0] || p[1] != color[1] 397 || p[2] != color[2] || p[3] != color[3]) { 398 return Res_png_9patch::NO_COLOR; 399 } 400 } 401 top++; 402 } 403 404 if (color[3] == 0) { 405 return Res_png_9patch::TRANSPARENT_COLOR; 406 } 407 return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; 408} 409 410static void select_patch( 411 int which, int front, int back, int size, int* start, int* end) 412{ 413 switch (which) { 414 case 0: 415 *start = 0; 416 *end = front-1; 417 break; 418 case 1: 419 *start = front; 420 *end = back-1; 421 break; 422 case 2: 423 *start = back; 424 *end = size-1; 425 break; 426 } 427} 428 429static uint32_t get_color(image_info* image, int hpatch, int vpatch) 430{ 431 int left, right, top, bottom; 432 select_patch( 433 hpatch, image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], 434 image->width, &left, &right); 435 select_patch( 436 vpatch, image->info9Patch.yDivs[0], image->info9Patch.yDivs[1], 437 image->height, &top, &bottom); 438 //printf("Selecting h=%d v=%d: (%d,%d)-(%d,%d)\n", 439 // hpatch, vpatch, left, top, right, bottom); 440 const uint32_t c = get_color(image->rows, left, top, right, bottom); 441 NOISY(printf("Color in (%d,%d)-(%d,%d): #%08x\n", left, top, right, bottom, c)); 442 return c; 443} 444 445static status_t do_9patch(const char* imageName, image_info* image) 446{ 447 image->is9Patch = true; 448 449 int W = image->width; 450 int H = image->height; 451 int i, j; 452 453 int maxSizeXDivs = W * sizeof(int32_t); 454 int maxSizeYDivs = H * sizeof(int32_t); 455 int32_t* xDivs = image->info9Patch.xDivs = (int32_t*) malloc(maxSizeXDivs); 456 int32_t* yDivs = image->info9Patch.yDivs = (int32_t*) malloc(maxSizeYDivs); 457 uint8_t numXDivs = 0; 458 uint8_t numYDivs = 0; 459 460 int8_t numColors; 461 int numRows; 462 int numCols; 463 int top; 464 int left; 465 int right; 466 int bottom; 467 memset(xDivs, -1, maxSizeXDivs); 468 memset(yDivs, -1, maxSizeYDivs); 469 image->info9Patch.paddingLeft = image->info9Patch.paddingRight = 470 image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; 471 472 image->layoutBoundsLeft = image->layoutBoundsRight = 473 image->layoutBoundsTop = image->layoutBoundsBottom = 0; 474 475 png_bytep p = image->rows[0]; 476 bool transparent = p[3] == 0; 477 bool hasColor = false; 478 479 const char* errorMsg = NULL; 480 int errorPixel = -1; 481 const char* errorEdge = NULL; 482 483 int colorIndex = 0; 484 485 // Validate size... 486 if (W < 3 || H < 3) { 487 errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; 488 goto getout; 489 } 490 491 // Validate frame... 492 if (!transparent && 493 (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { 494 errorMsg = "Must have one-pixel frame that is either transparent or white"; 495 goto getout; 496 } 497 498 // Find left and right of sizing areas... 499 if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], 500 &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { 501 errorPixel = xDivs[0]; 502 errorEdge = "top"; 503 goto getout; 504 } 505 506 // Find top and bottom of sizing areas... 507 if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], 508 &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { 509 errorPixel = yDivs[0]; 510 errorEdge = "left"; 511 goto getout; 512 } 513 514 // Copy patch size data into image... 515 image->info9Patch.numXDivs = numXDivs; 516 image->info9Patch.numYDivs = numYDivs; 517 518 // Find left and right of padding area... 519 if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, 520 &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { 521 errorPixel = image->info9Patch.paddingLeft; 522 errorEdge = "bottom"; 523 goto getout; 524 } 525 526 // Find top and bottom of padding area... 527 if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, 528 &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { 529 errorPixel = image->info9Patch.paddingTop; 530 errorEdge = "right"; 531 goto getout; 532 } 533 534 // Find left and right of layout padding... 535 get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, 536 &image->layoutBoundsLeft, 537 &image->layoutBoundsRight, &errorMsg); 538 539 get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, 540 &image->layoutBoundsTop, 541 &image->layoutBoundsBottom, &errorMsg); 542 543 image->haveLayoutBounds = image->layoutBoundsLeft != 0 544 || image->layoutBoundsRight != 0 545 || image->layoutBoundsTop != 0 546 || image->layoutBoundsBottom != 0; 547 548 if (image->haveLayoutBounds) { 549 NOISY(printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, 550 image->layoutBoundsRight, image->layoutBoundsBottom)); 551 } 552 553 // If padding is not yet specified, take values from size. 554 if (image->info9Patch.paddingLeft < 0) { 555 image->info9Patch.paddingLeft = xDivs[0]; 556 image->info9Patch.paddingRight = W - 2 - xDivs[1]; 557 } else { 558 // Adjust value to be correct! 559 image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; 560 } 561 if (image->info9Patch.paddingTop < 0) { 562 image->info9Patch.paddingTop = yDivs[0]; 563 image->info9Patch.paddingBottom = H - 2 - yDivs[1]; 564 } else { 565 // Adjust value to be correct! 566 image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; 567 } 568 569 NOISY(printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, 570 image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], 571 image->info9Patch.yDivs[0], image->info9Patch.yDivs[1])); 572 NOISY(printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, 573 image->info9Patch.paddingLeft, image->info9Patch.paddingRight, 574 image->info9Patch.paddingTop, image->info9Patch.paddingBottom)); 575 576 // Remove frame from image. 577 image->rows = (png_bytepp)malloc((H-2) * sizeof(png_bytep)); 578 for (i=0; i<(H-2); i++) { 579 image->rows[i] = image->allocRows[i+1]; 580 memmove(image->rows[i], image->rows[i]+4, (W-2)*4); 581 } 582 image->width -= 2; 583 W = image->width; 584 image->height -= 2; 585 H = image->height; 586 587 // Figure out the number of rows and columns in the N-patch 588 numCols = numXDivs + 1; 589 if (xDivs[0] == 0) { // Column 1 is strechable 590 numCols--; 591 } 592 if (xDivs[numXDivs - 1] == W) { 593 numCols--; 594 } 595 numRows = numYDivs + 1; 596 if (yDivs[0] == 0) { // Row 1 is strechable 597 numRows--; 598 } 599 if (yDivs[numYDivs - 1] == H) { 600 numRows--; 601 } 602 603 // Make sure the amount of rows and columns will fit in the number of 604 // colors we can use in the 9-patch format. 605 if (numRows * numCols > 0x7F) { 606 errorMsg = "Too many rows and columns in 9-patch perimeter"; 607 goto getout; 608 } 609 610 numColors = numRows * numCols; 611 image->info9Patch.numColors = numColors; 612 image->info9Patch.colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); 613 614 // Fill in color information for each patch. 615 616 uint32_t c; 617 top = 0; 618 619 // The first row always starts with the top being at y=0 and the bottom 620 // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case 621 // the first row is stretchable along the Y axis, otherwise it is fixed. 622 // The last row always ends with the bottom being bitmap.height and the top 623 // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or 624 // yDivs[numYDivs-1]. In the former case the last row is stretchable along 625 // the Y axis, otherwise it is fixed. 626 // 627 // The first and last columns are similarly treated with respect to the X 628 // axis. 629 // 630 // The above is to help explain some of the special casing that goes on the 631 // code below. 632 633 // The initial yDiv and whether the first row is considered stretchable or 634 // not depends on whether yDiv[0] was zero or not. 635 for (j = (yDivs[0] == 0 ? 1 : 0); 636 j <= numYDivs && top < H; 637 j++) { 638 if (j == numYDivs) { 639 bottom = H; 640 } else { 641 bottom = yDivs[j]; 642 } 643 left = 0; 644 // The initial xDiv and whether the first column is considered 645 // stretchable or not depends on whether xDiv[0] was zero or not. 646 for (i = xDivs[0] == 0 ? 1 : 0; 647 i <= numXDivs && left < W; 648 i++) { 649 if (i == numXDivs) { 650 right = W; 651 } else { 652 right = xDivs[i]; 653 } 654 c = get_color(image->rows, left, top, right - 1, bottom - 1); 655 image->info9Patch.colors[colorIndex++] = c; 656 NOISY(if (c != Res_png_9patch::NO_COLOR) hasColor = true); 657 left = right; 658 } 659 top = bottom; 660 } 661 662 assert(colorIndex == numColors); 663 664 for (i=0; i<numColors; i++) { 665 if (hasColor) { 666 if (i == 0) printf("Colors in %s:\n ", imageName); 667 printf(" #%08x", image->info9Patch.colors[i]); 668 if (i == numColors - 1) printf("\n"); 669 } 670 } 671 672 image->is9Patch = true; 673 image->info9Patch.deviceToFile(); 674 675getout: 676 if (errorMsg) { 677 fprintf(stderr, 678 "ERROR: 9-patch image %s malformed.\n" 679 " %s.\n", imageName, errorMsg); 680 if (errorEdge != NULL) { 681 if (errorPixel >= 0) { 682 fprintf(stderr, 683 " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); 684 } else { 685 fprintf(stderr, 686 " Found along %s edge.\n", errorEdge); 687 } 688 } 689 return UNKNOWN_ERROR; 690 } 691 return NO_ERROR; 692} 693 694static void checkNinePatchSerialization(Res_png_9patch* inPatch, void * data) 695{ 696 if (sizeof(void*) != sizeof(int32_t)) { 697 // can't deserialize on a non-32 bit system 698 return; 699 } 700 size_t patchSize = inPatch->serializedSize(); 701 void * newData = malloc(patchSize); 702 memcpy(newData, data, patchSize); 703 Res_png_9patch* outPatch = inPatch->deserialize(newData); 704 // deserialization is done in place, so outPatch == newData 705 assert(outPatch == newData); 706 assert(outPatch->numXDivs == inPatch->numXDivs); 707 assert(outPatch->numYDivs == inPatch->numYDivs); 708 assert(outPatch->paddingLeft == inPatch->paddingLeft); 709 assert(outPatch->paddingRight == inPatch->paddingRight); 710 assert(outPatch->paddingTop == inPatch->paddingTop); 711 assert(outPatch->paddingBottom == inPatch->paddingBottom); 712 for (int i = 0; i < outPatch->numXDivs; i++) { 713 assert(outPatch->xDivs[i] == inPatch->xDivs[i]); 714 } 715 for (int i = 0; i < outPatch->numYDivs; i++) { 716 assert(outPatch->yDivs[i] == inPatch->yDivs[i]); 717 } 718 for (int i = 0; i < outPatch->numColors; i++) { 719 assert(outPatch->colors[i] == inPatch->colors[i]); 720 } 721 free(newData); 722} 723 724static bool patch_equals(Res_png_9patch& patch1, Res_png_9patch& patch2) { 725 if (!(patch1.numXDivs == patch2.numXDivs && 726 patch1.numYDivs == patch2.numYDivs && 727 patch1.numColors == patch2.numColors && 728 patch1.paddingLeft == patch2.paddingLeft && 729 patch1.paddingRight == patch2.paddingRight && 730 patch1.paddingTop == patch2.paddingTop && 731 patch1.paddingBottom == patch2.paddingBottom)) { 732 return false; 733 } 734 for (int i = 0; i < patch1.numColors; i++) { 735 if (patch1.colors[i] != patch2.colors[i]) { 736 return false; 737 } 738 } 739 for (int i = 0; i < patch1.numXDivs; i++) { 740 if (patch1.xDivs[i] != patch2.xDivs[i]) { 741 return false; 742 } 743 } 744 for (int i = 0; i < patch1.numYDivs; i++) { 745 if (patch1.yDivs[i] != patch2.yDivs[i]) { 746 return false; 747 } 748 } 749 return true; 750} 751 752static void dump_image(int w, int h, png_bytepp rows, int color_type) 753{ 754 int i, j, rr, gg, bb, aa; 755 756 int bpp; 757 if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { 758 bpp = 1; 759 } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { 760 bpp = 2; 761 } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 762 // We use a padding byte even when there is no alpha 763 bpp = 4; 764 } else { 765 printf("Unknown color type %d.\n", color_type); 766 } 767 768 for (j = 0; j < h; j++) { 769 png_bytep row = rows[j]; 770 for (i = 0; i < w; i++) { 771 rr = row[0]; 772 gg = row[1]; 773 bb = row[2]; 774 aa = row[3]; 775 row += bpp; 776 777 if (i == 0) { 778 printf("Row %d:", j); 779 } 780 switch (bpp) { 781 case 1: 782 printf(" (%d)", rr); 783 break; 784 case 2: 785 printf(" (%d %d", rr, gg); 786 break; 787 case 3: 788 printf(" (%d %d %d)", rr, gg, bb); 789 break; 790 case 4: 791 printf(" (%d %d %d %d)", rr, gg, bb, aa); 792 break; 793 } 794 if (i == (w - 1)) { 795 NOISY(printf("\n")); 796 } 797 } 798 } 799} 800 801#define MAX(a,b) ((a)>(b)?(a):(b)) 802#define ABS(a) ((a)<0?-(a):(a)) 803 804static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, 805 png_colorp rgbPalette, png_bytep alphaPalette, 806 int *paletteEntries, bool *hasTransparency, int *colorType, 807 png_bytepp outRows) 808{ 809 int w = imageInfo.width; 810 int h = imageInfo.height; 811 int i, j, rr, gg, bb, aa, idx; 812 uint32_t colors[256], col; 813 int num_colors = 0; 814 int maxGrayDeviation = 0; 815 816 bool isOpaque = true; 817 bool isPalette = true; 818 bool isGrayscale = true; 819 820 // Scan the entire image and determine if: 821 // 1. Every pixel has R == G == B (grayscale) 822 // 2. Every pixel has A == 255 (opaque) 823 // 3. There are no more than 256 distinct RGBA colors 824 825 // NOISY(printf("Initial image data:\n")); 826 // dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); 827 828 for (j = 0; j < h; j++) { 829 png_bytep row = imageInfo.rows[j]; 830 png_bytep out = outRows[j]; 831 for (i = 0; i < w; i++) { 832 rr = *row++; 833 gg = *row++; 834 bb = *row++; 835 aa = *row++; 836 837 int odev = maxGrayDeviation; 838 maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); 839 maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); 840 maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); 841 if (maxGrayDeviation > odev) { 842 NOISY(printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", 843 maxGrayDeviation, i, j, rr, gg, bb, aa)); 844 } 845 846 // Check if image is really grayscale 847 if (isGrayscale) { 848 if (rr != gg || rr != bb) { 849 NOISY(printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", 850 i, j, rr, gg, bb, aa)); 851 isGrayscale = false; 852 } 853 } 854 855 // Check if image is really opaque 856 if (isOpaque) { 857 if (aa != 0xff) { 858 NOISY(printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", 859 i, j, rr, gg, bb, aa)); 860 isOpaque = false; 861 } 862 } 863 864 // Check if image is really <= 256 colors 865 if (isPalette) { 866 col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); 867 bool match = false; 868 for (idx = 0; idx < num_colors; idx++) { 869 if (colors[idx] == col) { 870 match = true; 871 break; 872 } 873 } 874 875 // Write the palette index for the pixel to outRows optimistically 876 // We might overwrite it later if we decide to encode as gray or 877 // gray + alpha 878 *out++ = idx; 879 if (!match) { 880 if (num_colors == 256) { 881 NOISY(printf("Found 257th color at %d, %d\n", i, j)); 882 isPalette = false; 883 } else { 884 colors[num_colors++] = col; 885 } 886 } 887 } 888 } 889 } 890 891 *paletteEntries = 0; 892 *hasTransparency = !isOpaque; 893 int bpp = isOpaque ? 3 : 4; 894 int paletteSize = w * h + bpp * num_colors; 895 896 NOISY(printf("isGrayscale = %s\n", isGrayscale ? "true" : "false")); 897 NOISY(printf("isOpaque = %s\n", isOpaque ? "true" : "false")); 898 NOISY(printf("isPalette = %s\n", isPalette ? "true" : "false")); 899 NOISY(printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", 900 paletteSize, 2 * w * h, bpp * w * h)); 901 NOISY(printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance)); 902 903 // Choose the best color type for the image. 904 // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel 905 // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations 906 // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA 907 // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently 908 // small, otherwise use COLOR_TYPE_RGB{_ALPHA} 909 if (isGrayscale) { 910 if (isOpaque) { 911 *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel 912 } else { 913 // Use a simple heuristic to determine whether using a palette will 914 // save space versus using gray + alpha for each pixel. 915 // This doesn't take into account chunk overhead, filtering, LZ 916 // compression, etc. 917 if (isPalette && (paletteSize < 2 * w * h)) { 918 *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color 919 } else { 920 *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel 921 } 922 } 923 } else if (isPalette && (paletteSize < bpp * w * h)) { 924 *colorType = PNG_COLOR_TYPE_PALETTE; 925 } else { 926 if (maxGrayDeviation <= grayscaleTolerance) { 927 printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); 928 *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; 929 } else { 930 *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; 931 } 932 } 933 934 // Perform postprocessing of the image or palette data based on the final 935 // color type chosen 936 937 if (*colorType == PNG_COLOR_TYPE_PALETTE) { 938 // Create separate RGB and Alpha palettes and set the number of colors 939 *paletteEntries = num_colors; 940 941 // Create the RGB and alpha palettes 942 for (int idx = 0; idx < num_colors; idx++) { 943 col = colors[idx]; 944 rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); 945 rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); 946 rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); 947 alphaPalette[idx] = (png_byte) (col & 0xff); 948 } 949 } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { 950 // If the image is gray or gray + alpha, compact the pixels into outRows 951 for (j = 0; j < h; j++) { 952 png_bytep row = imageInfo.rows[j]; 953 png_bytep out = outRows[j]; 954 for (i = 0; i < w; i++) { 955 rr = *row++; 956 gg = *row++; 957 bb = *row++; 958 aa = *row++; 959 960 if (isGrayscale) { 961 *out++ = rr; 962 } else { 963 *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); 964 } 965 if (!isOpaque) { 966 *out++ = aa; 967 } 968 } 969 } 970 } 971} 972 973 974static void write_png(const char* imageName, 975 png_structp write_ptr, png_infop write_info, 976 image_info& imageInfo, int grayscaleTolerance) 977{ 978 bool optimize = true; 979 png_uint_32 width, height; 980 int color_type; 981 int bit_depth, interlace_type, compression_type; 982 int i; 983 984 png_unknown_chunk unknowns[2]; 985 unknowns[0].data = NULL; 986 unknowns[1].data = NULL; 987 988 png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * sizeof(png_bytep)); 989 if (outRows == (png_bytepp) 0) { 990 printf("Can't allocate output buffer!\n"); 991 exit(1); 992 } 993 for (i = 0; i < (int) imageInfo.height; i++) { 994 outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); 995 if (outRows[i] == (png_bytep) 0) { 996 printf("Can't allocate output buffer!\n"); 997 exit(1); 998 } 999 } 1000 1001 png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); 1002 1003 NOISY(printf("Writing image %s: w = %d, h = %d\n", imageName, 1004 (int) imageInfo.width, (int) imageInfo.height)); 1005 1006 png_color rgbPalette[256]; 1007 png_byte alphaPalette[256]; 1008 bool hasTransparency; 1009 int paletteEntries; 1010 1011 analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, 1012 &paletteEntries, &hasTransparency, &color_type, outRows); 1013 1014 // If the image is a 9-patch, we need to preserve it as a ARGB file to make 1015 // sure the pixels will not be pre-dithered/clamped until we decide they are 1016 if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || 1017 color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { 1018 color_type = PNG_COLOR_TYPE_RGB_ALPHA; 1019 } 1020 1021 switch (color_type) { 1022 case PNG_COLOR_TYPE_PALETTE: 1023 NOISY(printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", 1024 imageName, paletteEntries, 1025 hasTransparency ? " (with alpha)" : "")); 1026 break; 1027 case PNG_COLOR_TYPE_GRAY: 1028 NOISY(printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName)); 1029 break; 1030 case PNG_COLOR_TYPE_GRAY_ALPHA: 1031 NOISY(printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName)); 1032 break; 1033 case PNG_COLOR_TYPE_RGB: 1034 NOISY(printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName)); 1035 break; 1036 case PNG_COLOR_TYPE_RGB_ALPHA: 1037 NOISY(printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName)); 1038 break; 1039 } 1040 1041 png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, 1042 8, color_type, PNG_INTERLACE_NONE, 1043 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); 1044 1045 if (color_type == PNG_COLOR_TYPE_PALETTE) { 1046 png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); 1047 if (hasTransparency) { 1048 png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); 1049 } 1050 png_set_filter(write_ptr, 0, PNG_NO_FILTERS); 1051 } else { 1052 png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); 1053 } 1054 1055 if (imageInfo.is9Patch) { 1056 int chunk_count = 1 + (imageInfo.haveLayoutBounds ? 1 : 0); 1057 int p_index = imageInfo.haveLayoutBounds ? 1 : 0; 1058 int b_index = 0; 1059 png_byte *chunk_names = imageInfo.haveLayoutBounds 1060 ? (png_byte*)"npLb\0npTc\0" 1061 : (png_byte*)"npTc"; 1062 NOISY(printf("Adding 9-patch info...\n")); 1063 strcpy((char*)unknowns[p_index].name, "npTc"); 1064 unknowns[p_index].data = (png_byte*)imageInfo.info9Patch.serialize(); 1065 unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); 1066 // TODO: remove the check below when everything works 1067 checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); 1068 1069 if (imageInfo.haveLayoutBounds) { 1070 int chunk_size = sizeof(png_uint_32) * 4; 1071 strcpy((char*)unknowns[b_index].name, "npLb"); 1072 unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); 1073 memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); 1074 unknowns[b_index].size = chunk_size; 1075 } 1076 1077 for (int i = 0; i < chunk_count; i++) { 1078 unknowns[i].location = PNG_HAVE_PLTE; 1079 } 1080 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1081 chunk_names, chunk_count); 1082 png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); 1083#if PNG_LIBPNG_VER < 10600 1084 /* Deal with unknown chunk location bug in 1.5.x and earlier */ 1085 png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); 1086 if (imageInfo.haveLayoutBounds) { 1087 png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); 1088 } 1089#endif 1090 } 1091 1092 1093 png_write_info(write_ptr, write_info); 1094 1095 png_bytepp rows; 1096 if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 1097 if (color_type == PNG_COLOR_TYPE_RGB) { 1098 png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); 1099 } 1100 rows = imageInfo.rows; 1101 } else { 1102 rows = outRows; 1103 } 1104 png_write_image(write_ptr, rows); 1105 1106// NOISY(printf("Final image data:\n")); 1107// dump_image(imageInfo.width, imageInfo.height, rows, color_type); 1108 1109 png_write_end(write_ptr, write_info); 1110 1111 for (i = 0; i < (int) imageInfo.height; i++) { 1112 free(outRows[i]); 1113 } 1114 free(outRows); 1115 free(unknowns[0].data); 1116 free(unknowns[1].data); 1117 1118 png_get_IHDR(write_ptr, write_info, &width, &height, 1119 &bit_depth, &color_type, &interlace_type, 1120 &compression_type, NULL); 1121 1122 NOISY(printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 1123 (int)width, (int)height, bit_depth, color_type, interlace_type, 1124 compression_type)); 1125} 1126 1127status_t preProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1128 const sp<AaptFile>& file, String8* outNewLeafName) 1129{ 1130 String8 ext(file->getPath().getPathExtension()); 1131 1132 // We currently only process PNG images. 1133 if (strcmp(ext.string(), ".png") != 0) { 1134 return NO_ERROR; 1135 } 1136 1137 // Example of renaming a file: 1138 //*outNewLeafName = file->getPath().getBasePath().getFileName(); 1139 //outNewLeafName->append(".nupng"); 1140 1141 String8 printableName(file->getPrintableSource()); 1142 1143 if (bundle->getVerbose()) { 1144 printf("Processing image: %s\n", printableName.string()); 1145 } 1146 1147 png_structp read_ptr = NULL; 1148 png_infop read_info = NULL; 1149 FILE* fp; 1150 1151 image_info imageInfo; 1152 1153 png_structp write_ptr = NULL; 1154 png_infop write_info = NULL; 1155 1156 status_t error = UNKNOWN_ERROR; 1157 1158 const size_t nameLen = file->getPath().length(); 1159 1160 fp = fopen(file->getSourceFile().string(), "rb"); 1161 if (fp == NULL) { 1162 fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); 1163 goto bail; 1164 } 1165 1166 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1167 (png_error_ptr)NULL); 1168 if (!read_ptr) { 1169 goto bail; 1170 } 1171 1172 read_info = png_create_info_struct(read_ptr); 1173 if (!read_info) { 1174 goto bail; 1175 } 1176 1177 if (setjmp(png_jmpbuf(read_ptr))) { 1178 goto bail; 1179 } 1180 1181 png_init_io(read_ptr, fp); 1182 1183 read_png(printableName.string(), read_ptr, read_info, &imageInfo); 1184 1185 if (nameLen > 6) { 1186 const char* name = file->getPath().string(); 1187 if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { 1188 if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { 1189 goto bail; 1190 } 1191 } 1192 } 1193 1194 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1195 (png_error_ptr)NULL); 1196 if (!write_ptr) 1197 { 1198 goto bail; 1199 } 1200 1201 write_info = png_create_info_struct(write_ptr); 1202 if (!write_info) 1203 { 1204 goto bail; 1205 } 1206 1207 png_set_write_fn(write_ptr, (void*)file.get(), 1208 png_write_aapt_file, png_flush_aapt_file); 1209 1210 if (setjmp(png_jmpbuf(write_ptr))) 1211 { 1212 goto bail; 1213 } 1214 1215 write_png(printableName.string(), write_ptr, write_info, imageInfo, 1216 bundle->getGrayscaleTolerance()); 1217 1218 error = NO_ERROR; 1219 1220 if (bundle->getVerbose()) { 1221 fseek(fp, 0, SEEK_END); 1222 size_t oldSize = (size_t)ftell(fp); 1223 size_t newSize = file->getSize(); 1224 float factor = ((float)newSize)/oldSize; 1225 int percent = (int)(factor*100); 1226 printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); 1227 } 1228 1229bail: 1230 if (read_ptr) { 1231 png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); 1232 } 1233 if (fp) { 1234 fclose(fp); 1235 } 1236 if (write_ptr) { 1237 png_destroy_write_struct(&write_ptr, &write_info); 1238 } 1239 1240 if (error != NO_ERROR) { 1241 fprintf(stderr, "ERROR: Failure processing PNG image %s\n", 1242 file->getPrintableSource().string()); 1243 } 1244 return error; 1245} 1246 1247status_t preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) 1248{ 1249 png_structp read_ptr = NULL; 1250 png_infop read_info = NULL; 1251 1252 FILE* fp; 1253 1254 image_info imageInfo; 1255 1256 png_structp write_ptr = NULL; 1257 png_infop write_info = NULL; 1258 1259 status_t error = UNKNOWN_ERROR; 1260 1261 if (bundle->getVerbose()) { 1262 printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); 1263 } 1264 1265 // Get a file handler to read from 1266 fp = fopen(source.string(),"rb"); 1267 if (fp == NULL) { 1268 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); 1269 return error; 1270 } 1271 1272 // Call libpng to get a struct to read image data into 1273 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1274 if (!read_ptr) { 1275 fclose(fp); 1276 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1277 return error; 1278 } 1279 1280 // Call libpng to get a struct to read image info into 1281 read_info = png_create_info_struct(read_ptr); 1282 if (!read_info) { 1283 fclose(fp); 1284 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1285 return error; 1286 } 1287 1288 // Set a jump point for libpng to long jump back to on error 1289 if (setjmp(png_jmpbuf(read_ptr))) { 1290 fclose(fp); 1291 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1292 return error; 1293 } 1294 1295 // Set up libpng to read from our file. 1296 png_init_io(read_ptr,fp); 1297 1298 // Actually read data from the file 1299 read_png(source.string(), read_ptr, read_info, &imageInfo); 1300 1301 // We're done reading so we can clean up 1302 // Find old file size before releasing handle 1303 fseek(fp, 0, SEEK_END); 1304 size_t oldSize = (size_t)ftell(fp); 1305 fclose(fp); 1306 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1307 1308 // Check to see if we're dealing with a 9-patch 1309 // If we are, process appropriately 1310 if (source.getBasePath().getPathExtension() == ".9") { 1311 if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { 1312 return error; 1313 } 1314 } 1315 1316 // Call libpng to create a structure to hold the processed image data 1317 // that can be written to disk 1318 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1319 if (!write_ptr) { 1320 png_destroy_write_struct(&write_ptr, &write_info); 1321 return error; 1322 } 1323 1324 // Call libpng to create a structure to hold processed image info that can 1325 // be written to disk 1326 write_info = png_create_info_struct(write_ptr); 1327 if (!write_info) { 1328 png_destroy_write_struct(&write_ptr, &write_info); 1329 return error; 1330 } 1331 1332 // Open up our destination file for writing 1333 fp = fopen(dest.string(), "wb"); 1334 if (!fp) { 1335 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); 1336 png_destroy_write_struct(&write_ptr, &write_info); 1337 return error; 1338 } 1339 1340 // Set up libpng to write to our file 1341 png_init_io(write_ptr, fp); 1342 1343 // Set up a jump for libpng to long jump back on on errors 1344 if (setjmp(png_jmpbuf(write_ptr))) { 1345 fclose(fp); 1346 png_destroy_write_struct(&write_ptr, &write_info); 1347 return error; 1348 } 1349 1350 // Actually write out to the new png 1351 write_png(dest.string(), write_ptr, write_info, imageInfo, 1352 bundle->getGrayscaleTolerance()); 1353 1354 if (bundle->getVerbose()) { 1355 // Find the size of our new file 1356 FILE* reader = fopen(dest.string(), "rb"); 1357 fseek(reader, 0, SEEK_END); 1358 size_t newSize = (size_t)ftell(reader); 1359 fclose(reader); 1360 1361 float factor = ((float)newSize)/oldSize; 1362 int percent = (int)(factor*100); 1363 printf(" (processed image to cache entry %s: %d%% size of source)\n", 1364 dest.string(), percent); 1365 } 1366 1367 //Clean up 1368 fclose(fp); 1369 png_destroy_write_struct(&write_ptr, &write_info); 1370 1371 return NO_ERROR; 1372} 1373 1374status_t postProcessImage(const sp<AaptAssets>& assets, 1375 ResourceTable* table, const sp<AaptFile>& file) 1376{ 1377 String8 ext(file->getPath().getPathExtension()); 1378 1379 // At this point, now that we have all the resource data, all we need to 1380 // do is compile XML files. 1381 if (strcmp(ext.string(), ".xml") == 0) { 1382 return compileXmlFile(assets, file, table); 1383 } 1384 1385 return NO_ERROR; 1386} 1387