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 19 static void 20 png_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 30 static void 31 png_flush_aapt_file(png_structp png_ptr) 32 { 33 } 34 35 // This holds an image as 8bpp RGBA. 36 struct 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 // Round rect outline description 81 int32_t outlineInsetsLeft; 82 int32_t outlineInsetsTop; 83 int32_t outlineInsetsRight; 84 int32_t outlineInsetsBottom; 85 float outlineRadius; 86 uint8_t outlineAlpha; 87 88 png_uint_32 allocHeight; 89 png_bytepp allocRows; 90 }; 91 92 static void log_warning(png_structp png_ptr, png_const_charp warning_message) 93 { 94 const char* imageName = (const char*) png_get_error_ptr(png_ptr); 95 fprintf(stderr, "%s: libpng warning: %s\n", imageName, warning_message); 96 } 97 98 static void read_png(const char* imageName, 99 png_structp read_ptr, png_infop read_info, 100 image_info* outImageInfo) 101 { 102 int color_type; 103 int bit_depth, interlace_type, compression_type; 104 int i; 105 106 png_set_error_fn(read_ptr, const_cast<char*>(imageName), 107 NULL /* use default errorfn */, log_warning); 108 png_read_info(read_ptr, read_info); 109 110 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 111 &outImageInfo->height, &bit_depth, &color_type, 112 &interlace_type, &compression_type, NULL); 113 114 //printf("Image %s:\n", imageName); 115 //printf("color_type=%d, bit_depth=%d, interlace_type=%d, compression_type=%d\n", 116 // color_type, bit_depth, interlace_type, compression_type); 117 118 if (color_type == PNG_COLOR_TYPE_PALETTE) 119 png_set_palette_to_rgb(read_ptr); 120 121 if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) 122 png_set_expand_gray_1_2_4_to_8(read_ptr); 123 124 if (png_get_valid(read_ptr, read_info, PNG_INFO_tRNS)) { 125 //printf("Has PNG_INFO_tRNS!\n"); 126 png_set_tRNS_to_alpha(read_ptr); 127 } 128 129 if (bit_depth == 16) 130 png_set_strip_16(read_ptr); 131 132 if ((color_type&PNG_COLOR_MASK_ALPHA) == 0) 133 png_set_add_alpha(read_ptr, 0xFF, PNG_FILLER_AFTER); 134 135 if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) 136 png_set_gray_to_rgb(read_ptr); 137 138 png_set_interlace_handling(read_ptr); 139 140 png_read_update_info(read_ptr, read_info); 141 142 outImageInfo->rows = (png_bytepp)malloc( 143 outImageInfo->height * sizeof(png_bytep)); 144 outImageInfo->allocHeight = outImageInfo->height; 145 outImageInfo->allocRows = outImageInfo->rows; 146 147 png_set_rows(read_ptr, read_info, outImageInfo->rows); 148 149 for (i = 0; i < (int)outImageInfo->height; i++) 150 { 151 outImageInfo->rows[i] = (png_bytep) 152 malloc(png_get_rowbytes(read_ptr, read_info)); 153 } 154 155 png_read_image(read_ptr, outImageInfo->rows); 156 157 png_read_end(read_ptr, read_info); 158 159 NOISY(printf("Image %s: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 160 imageName, 161 (int)outImageInfo->width, (int)outImageInfo->height, 162 bit_depth, color_type, 163 interlace_type, compression_type)); 164 165 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 166 &outImageInfo->height, &bit_depth, &color_type, 167 &interlace_type, &compression_type, NULL); 168 } 169 170 #define COLOR_TRANSPARENT 0 171 #define COLOR_WHITE 0xFFFFFFFF 172 #define COLOR_TICK 0xFF000000 173 #define COLOR_LAYOUT_BOUNDS_TICK 0xFF0000FF 174 175 enum { 176 TICK_TYPE_NONE, 177 TICK_TYPE_TICK, 178 TICK_TYPE_LAYOUT_BOUNDS, 179 TICK_TYPE_BOTH 180 }; 181 182 static int tick_type(png_bytep p, bool transparent, const char** outError) 183 { 184 png_uint_32 color = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); 185 186 if (transparent) { 187 if (p[3] == 0) { 188 return TICK_TYPE_NONE; 189 } 190 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 191 return TICK_TYPE_LAYOUT_BOUNDS; 192 } 193 if (color == COLOR_TICK) { 194 return TICK_TYPE_TICK; 195 } 196 197 // Error cases 198 if (p[3] != 0xff) { 199 *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)"; 200 return TICK_TYPE_NONE; 201 } 202 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 203 *outError = "Ticks in transparent frame must be black or red"; 204 } 205 return TICK_TYPE_TICK; 206 } 207 208 if (p[3] != 0xFF) { 209 *outError = "White frame must be a solid color (no alpha)"; 210 } 211 if (color == COLOR_WHITE) { 212 return TICK_TYPE_NONE; 213 } 214 if (color == COLOR_TICK) { 215 return TICK_TYPE_TICK; 216 } 217 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 218 return TICK_TYPE_LAYOUT_BOUNDS; 219 } 220 221 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 222 *outError = "Ticks in white frame must be black or red"; 223 return TICK_TYPE_NONE; 224 } 225 return TICK_TYPE_TICK; 226 } 227 228 enum { 229 TICK_START, 230 TICK_INSIDE_1, 231 TICK_OUTSIDE_1 232 }; 233 234 static status_t get_horizontal_ticks( 235 png_bytep row, int width, bool transparent, bool required, 236 int32_t* outLeft, int32_t* outRight, const char** outError, 237 uint8_t* outDivs, bool multipleAllowed) 238 { 239 int i; 240 *outLeft = *outRight = -1; 241 int state = TICK_START; 242 bool found = false; 243 244 for (i=1; i<width-1; i++) { 245 if (TICK_TYPE_TICK == tick_type(row+i*4, transparent, outError)) { 246 if (state == TICK_START || 247 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 248 *outLeft = i-1; 249 *outRight = width-2; 250 found = true; 251 if (outDivs != NULL) { 252 *outDivs += 2; 253 } 254 state = TICK_INSIDE_1; 255 } else if (state == TICK_OUTSIDE_1) { 256 *outError = "Can't have more than one marked region along edge"; 257 *outLeft = i; 258 return UNKNOWN_ERROR; 259 } 260 } else if (*outError == NULL) { 261 if (state == TICK_INSIDE_1) { 262 // We're done with this div. Move on to the next. 263 *outRight = i-1; 264 outRight += 2; 265 outLeft += 2; 266 state = TICK_OUTSIDE_1; 267 } 268 } else { 269 *outLeft = i; 270 return UNKNOWN_ERROR; 271 } 272 } 273 274 if (required && !found) { 275 *outError = "No marked region found along edge"; 276 *outLeft = -1; 277 return UNKNOWN_ERROR; 278 } 279 280 return NO_ERROR; 281 } 282 283 static status_t get_vertical_ticks( 284 png_bytepp rows, int offset, int height, bool transparent, bool required, 285 int32_t* outTop, int32_t* outBottom, const char** outError, 286 uint8_t* outDivs, bool multipleAllowed) 287 { 288 int i; 289 *outTop = *outBottom = -1; 290 int state = TICK_START; 291 bool found = false; 292 293 for (i=1; i<height-1; i++) { 294 if (TICK_TYPE_TICK == tick_type(rows[i]+offset, transparent, outError)) { 295 if (state == TICK_START || 296 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 297 *outTop = i-1; 298 *outBottom = height-2; 299 found = true; 300 if (outDivs != NULL) { 301 *outDivs += 2; 302 } 303 state = TICK_INSIDE_1; 304 } else if (state == TICK_OUTSIDE_1) { 305 *outError = "Can't have more than one marked region along edge"; 306 *outTop = i; 307 return UNKNOWN_ERROR; 308 } 309 } else if (*outError == NULL) { 310 if (state == TICK_INSIDE_1) { 311 // We're done with this div. Move on to the next. 312 *outBottom = i-1; 313 outTop += 2; 314 outBottom += 2; 315 state = TICK_OUTSIDE_1; 316 } 317 } else { 318 *outTop = i; 319 return UNKNOWN_ERROR; 320 } 321 } 322 323 if (required && !found) { 324 *outError = "No marked region found along edge"; 325 *outTop = -1; 326 return UNKNOWN_ERROR; 327 } 328 329 return NO_ERROR; 330 } 331 332 static status_t get_horizontal_layout_bounds_ticks( 333 png_bytep row, int width, bool transparent, bool required, 334 int32_t* outLeft, int32_t* outRight, const char** outError) 335 { 336 int i; 337 *outLeft = *outRight = 0; 338 339 // Look for left tick 340 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + 4, transparent, outError)) { 341 // Starting with a layout padding tick 342 i = 1; 343 while (i < width - 1) { 344 (*outLeft)++; 345 i++; 346 int tick = tick_type(row + i * 4, transparent, outError); 347 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 348 break; 349 } 350 } 351 } 352 353 // Look for right tick 354 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + (width - 2) * 4, transparent, outError)) { 355 // Ending with a layout padding tick 356 i = width - 2; 357 while (i > 1) { 358 (*outRight)++; 359 i--; 360 int tick = tick_type(row+i*4, transparent, outError); 361 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 362 break; 363 } 364 } 365 } 366 367 return NO_ERROR; 368 } 369 370 static status_t get_vertical_layout_bounds_ticks( 371 png_bytepp rows, int offset, int height, bool transparent, bool required, 372 int32_t* outTop, int32_t* outBottom, const char** outError) 373 { 374 int i; 375 *outTop = *outBottom = 0; 376 377 // Look for top tick 378 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[1] + offset, transparent, outError)) { 379 // Starting with a layout padding tick 380 i = 1; 381 while (i < height - 1) { 382 (*outTop)++; 383 i++; 384 int tick = tick_type(rows[i] + offset, transparent, outError); 385 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 386 break; 387 } 388 } 389 } 390 391 // Look for bottom tick 392 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[height - 2] + offset, transparent, outError)) { 393 // Ending with a layout padding tick 394 i = height - 2; 395 while (i > 1) { 396 (*outBottom)++; 397 i--; 398 int tick = tick_type(rows[i] + offset, transparent, outError); 399 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 400 break; 401 } 402 } 403 } 404 405 return NO_ERROR; 406 } 407 408 static void find_max_opacity(png_byte** rows, 409 int startX, int startY, int endX, int endY, int dX, int dY, 410 int* out_inset) 411 { 412 bool opaque_within_inset = true; 413 uint8_t max_opacity = 0; 414 int inset = 0; 415 *out_inset = 0; 416 for (int x = startX, y = startY; x != endX && y != endY; x += dX, y += dY, inset++) { 417 png_byte* color = rows[y] + x * 4; 418 uint8_t opacity = color[3]; 419 if (opacity > max_opacity) { 420 max_opacity = opacity; 421 *out_inset = inset; 422 } 423 if (opacity == 0xff) return; 424 } 425 } 426 427 static uint8_t max_alpha_over_row(png_byte* row, int startX, int endX) 428 { 429 uint8_t max_alpha = 0; 430 for (int x = startX; x < endX; x++) { 431 uint8_t alpha = (row + x * 4)[3]; 432 if (alpha > max_alpha) max_alpha = alpha; 433 } 434 return max_alpha; 435 } 436 437 static uint8_t max_alpha_over_col(png_byte** rows, int offsetX, int startY, int endY) 438 { 439 uint8_t max_alpha = 0; 440 for (int y = startY; y < endY; y++) { 441 uint8_t alpha = (rows[y] + offsetX * 4)[3]; 442 if (alpha > max_alpha) max_alpha = alpha; 443 } 444 return max_alpha; 445 } 446 447 static void get_outline(image_info* image) 448 { 449 int midX = image->width / 2; 450 int midY = image->height / 2; 451 int endX = image->width - 2; 452 int endY = image->height - 2; 453 454 // find left and right extent of nine patch content on center row 455 if (image->width > 4) { 456 find_max_opacity(image->rows, 1, midY, midX, -1, 1, 0, &image->outlineInsetsLeft); 457 find_max_opacity(image->rows, endX, midY, midX, -1, -1, 0, &image->outlineInsetsRight); 458 } else { 459 image->outlineInsetsLeft = 0; 460 image->outlineInsetsRight = 0; 461 } 462 463 // find top and bottom extent of nine patch content on center column 464 if (image->height > 4) { 465 find_max_opacity(image->rows, midX, 1, -1, midY, 0, 1, &image->outlineInsetsTop); 466 find_max_opacity(image->rows, midX, endY, -1, midY, 0, -1, &image->outlineInsetsBottom); 467 } else { 468 image->outlineInsetsTop = 0; 469 image->outlineInsetsBottom = 0; 470 } 471 472 int innerStartX = 1 + image->outlineInsetsLeft; 473 int innerStartY = 1 + image->outlineInsetsTop; 474 int innerEndX = endX - image->outlineInsetsRight; 475 int innerEndY = endY - image->outlineInsetsBottom; 476 int innerMidX = (innerEndX + innerStartX) / 2; 477 int innerMidY = (innerEndY + innerStartY) / 2; 478 479 // assuming the image is a round rect, compute the radius by marching 480 // diagonally from the top left corner towards the center 481 image->outlineAlpha = max(max_alpha_over_row(image->rows[innerMidY], innerStartX, innerEndX), 482 max_alpha_over_col(image->rows, innerMidX, innerStartY, innerStartY)); 483 484 int diagonalInset = 0; 485 find_max_opacity(image->rows, innerStartX, innerStartY, innerMidX, innerMidY, 1, 1, 486 &diagonalInset); 487 488 /* Determine source radius based upon inset: 489 * sqrt(r^2 + r^2) = sqrt(i^2 + i^2) + r 490 * sqrt(2) * r = sqrt(2) * i + r 491 * (sqrt(2) - 1) * r = sqrt(2) * i 492 * r = sqrt(2) / (sqrt(2) - 1) * i 493 */ 494 image->outlineRadius = 3.4142f * diagonalInset; 495 496 NOISY(printf("outline insets %d %d %d %d, rad %f, alpha %x\n", 497 image->outlineInsetsLeft, 498 image->outlineInsetsTop, 499 image->outlineInsetsRight, 500 image->outlineInsetsBottom, 501 image->outlineRadius, 502 image->outlineAlpha)); 503 } 504 505 506 static uint32_t get_color( 507 png_bytepp rows, int left, int top, int right, int bottom) 508 { 509 png_bytep color = rows[top] + left*4; 510 511 if (left > right || top > bottom) { 512 return Res_png_9patch::TRANSPARENT_COLOR; 513 } 514 515 while (top <= bottom) { 516 for (int i = left; i <= right; i++) { 517 png_bytep p = rows[top]+i*4; 518 if (color[3] == 0) { 519 if (p[3] != 0) { 520 return Res_png_9patch::NO_COLOR; 521 } 522 } else if (p[0] != color[0] || p[1] != color[1] 523 || p[2] != color[2] || p[3] != color[3]) { 524 return Res_png_9patch::NO_COLOR; 525 } 526 } 527 top++; 528 } 529 530 if (color[3] == 0) { 531 return Res_png_9patch::TRANSPARENT_COLOR; 532 } 533 return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; 534 } 535 536 static void select_patch( 537 int which, int front, int back, int size, int* start, int* end) 538 { 539 switch (which) { 540 case 0: 541 *start = 0; 542 *end = front-1; 543 break; 544 case 1: 545 *start = front; 546 *end = back-1; 547 break; 548 case 2: 549 *start = back; 550 *end = size-1; 551 break; 552 } 553 } 554 555 static uint32_t get_color(image_info* image, int hpatch, int vpatch) 556 { 557 int left, right, top, bottom; 558 select_patch( 559 hpatch, image->xDivs[0], image->xDivs[1], 560 image->width, &left, &right); 561 select_patch( 562 vpatch, image->yDivs[0], image->yDivs[1], 563 image->height, &top, &bottom); 564 //printf("Selecting h=%d v=%d: (%d,%d)-(%d,%d)\n", 565 // hpatch, vpatch, left, top, right, bottom); 566 const uint32_t c = get_color(image->rows, left, top, right, bottom); 567 NOISY(printf("Color in (%d,%d)-(%d,%d): #%08x\n", left, top, right, bottom, c)); 568 return c; 569 } 570 571 static status_t do_9patch(const char* imageName, image_info* image) 572 { 573 image->is9Patch = true; 574 575 int W = image->width; 576 int H = image->height; 577 int i, j; 578 579 int maxSizeXDivs = W * sizeof(int32_t); 580 int maxSizeYDivs = H * sizeof(int32_t); 581 int32_t* xDivs = image->xDivs = (int32_t*) malloc(maxSizeXDivs); 582 int32_t* yDivs = image->yDivs = (int32_t*) malloc(maxSizeYDivs); 583 uint8_t numXDivs = 0; 584 uint8_t numYDivs = 0; 585 586 int8_t numColors; 587 int numRows; 588 int numCols; 589 int top; 590 int left; 591 int right; 592 int bottom; 593 memset(xDivs, -1, maxSizeXDivs); 594 memset(yDivs, -1, maxSizeYDivs); 595 image->info9Patch.paddingLeft = image->info9Patch.paddingRight = 596 image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; 597 598 image->layoutBoundsLeft = image->layoutBoundsRight = 599 image->layoutBoundsTop = image->layoutBoundsBottom = 0; 600 601 png_bytep p = image->rows[0]; 602 bool transparent = p[3] == 0; 603 bool hasColor = false; 604 605 const char* errorMsg = NULL; 606 int errorPixel = -1; 607 const char* errorEdge = NULL; 608 609 int colorIndex = 0; 610 611 // Validate size... 612 if (W < 3 || H < 3) { 613 errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; 614 goto getout; 615 } 616 617 // Validate frame... 618 if (!transparent && 619 (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { 620 errorMsg = "Must have one-pixel frame that is either transparent or white"; 621 goto getout; 622 } 623 624 // Find left and right of sizing areas... 625 if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], 626 &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { 627 errorPixel = xDivs[0]; 628 errorEdge = "top"; 629 goto getout; 630 } 631 632 // Find top and bottom of sizing areas... 633 if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], 634 &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { 635 errorPixel = yDivs[0]; 636 errorEdge = "left"; 637 goto getout; 638 } 639 640 // Copy patch size data into image... 641 image->info9Patch.numXDivs = numXDivs; 642 image->info9Patch.numYDivs = numYDivs; 643 644 // Find left and right of padding area... 645 if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, 646 &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { 647 errorPixel = image->info9Patch.paddingLeft; 648 errorEdge = "bottom"; 649 goto getout; 650 } 651 652 // Find top and bottom of padding area... 653 if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, 654 &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { 655 errorPixel = image->info9Patch.paddingTop; 656 errorEdge = "right"; 657 goto getout; 658 } 659 660 // Find left and right of layout padding... 661 get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, 662 &image->layoutBoundsLeft, 663 &image->layoutBoundsRight, &errorMsg); 664 665 get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, 666 &image->layoutBoundsTop, 667 &image->layoutBoundsBottom, &errorMsg); 668 669 image->haveLayoutBounds = image->layoutBoundsLeft != 0 670 || image->layoutBoundsRight != 0 671 || image->layoutBoundsTop != 0 672 || image->layoutBoundsBottom != 0; 673 674 if (image->haveLayoutBounds) { 675 NOISY(printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, 676 image->layoutBoundsRight, image->layoutBoundsBottom)); 677 } 678 679 // use opacity of pixels to estimate the round rect outline 680 get_outline(image); 681 682 // If padding is not yet specified, take values from size. 683 if (image->info9Patch.paddingLeft < 0) { 684 image->info9Patch.paddingLeft = xDivs[0]; 685 image->info9Patch.paddingRight = W - 2 - xDivs[1]; 686 } else { 687 // Adjust value to be correct! 688 image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; 689 } 690 if (image->info9Patch.paddingTop < 0) { 691 image->info9Patch.paddingTop = yDivs[0]; 692 image->info9Patch.paddingBottom = H - 2 - yDivs[1]; 693 } else { 694 // Adjust value to be correct! 695 image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; 696 } 697 698 NOISY(printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, 699 xDivs[0], xDivs[1], 700 yDivs[0], yDivs[1])); 701 NOISY(printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, 702 image->info9Patch.paddingLeft, image->info9Patch.paddingRight, 703 image->info9Patch.paddingTop, image->info9Patch.paddingBottom)); 704 705 // Remove frame from image. 706 image->rows = (png_bytepp)malloc((H-2) * sizeof(png_bytep)); 707 for (i=0; i<(H-2); i++) { 708 image->rows[i] = image->allocRows[i+1]; 709 memmove(image->rows[i], image->rows[i]+4, (W-2)*4); 710 } 711 image->width -= 2; 712 W = image->width; 713 image->height -= 2; 714 H = image->height; 715 716 // Figure out the number of rows and columns in the N-patch 717 numCols = numXDivs + 1; 718 if (xDivs[0] == 0) { // Column 1 is strechable 719 numCols--; 720 } 721 if (xDivs[numXDivs - 1] == W) { 722 numCols--; 723 } 724 numRows = numYDivs + 1; 725 if (yDivs[0] == 0) { // Row 1 is strechable 726 numRows--; 727 } 728 if (yDivs[numYDivs - 1] == H) { 729 numRows--; 730 } 731 732 // Make sure the amount of rows and columns will fit in the number of 733 // colors we can use in the 9-patch format. 734 if (numRows * numCols > 0x7F) { 735 errorMsg = "Too many rows and columns in 9-patch perimeter"; 736 goto getout; 737 } 738 739 numColors = numRows * numCols; 740 image->info9Patch.numColors = numColors; 741 image->colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); 742 743 // Fill in color information for each patch. 744 745 uint32_t c; 746 top = 0; 747 748 // The first row always starts with the top being at y=0 and the bottom 749 // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case 750 // the first row is stretchable along the Y axis, otherwise it is fixed. 751 // The last row always ends with the bottom being bitmap.height and the top 752 // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or 753 // yDivs[numYDivs-1]. In the former case the last row is stretchable along 754 // the Y axis, otherwise it is fixed. 755 // 756 // The first and last columns are similarly treated with respect to the X 757 // axis. 758 // 759 // The above is to help explain some of the special casing that goes on the 760 // code below. 761 762 // The initial yDiv and whether the first row is considered stretchable or 763 // not depends on whether yDiv[0] was zero or not. 764 for (j = (yDivs[0] == 0 ? 1 : 0); 765 j <= numYDivs && top < H; 766 j++) { 767 if (j == numYDivs) { 768 bottom = H; 769 } else { 770 bottom = yDivs[j]; 771 } 772 left = 0; 773 // The initial xDiv and whether the first column is considered 774 // stretchable or not depends on whether xDiv[0] was zero or not. 775 for (i = xDivs[0] == 0 ? 1 : 0; 776 i <= numXDivs && left < W; 777 i++) { 778 if (i == numXDivs) { 779 right = W; 780 } else { 781 right = xDivs[i]; 782 } 783 c = get_color(image->rows, left, top, right - 1, bottom - 1); 784 image->colors[colorIndex++] = c; 785 NOISY(if (c != Res_png_9patch::NO_COLOR) hasColor = true); 786 left = right; 787 } 788 top = bottom; 789 } 790 791 assert(colorIndex == numColors); 792 793 for (i=0; i<numColors; i++) { 794 if (hasColor) { 795 if (i == 0) printf("Colors in %s:\n ", imageName); 796 printf(" #%08x", image->colors[i]); 797 if (i == numColors - 1) printf("\n"); 798 } 799 } 800 getout: 801 if (errorMsg) { 802 fprintf(stderr, 803 "ERROR: 9-patch image %s malformed.\n" 804 " %s.\n", imageName, errorMsg); 805 if (errorEdge != NULL) { 806 if (errorPixel >= 0) { 807 fprintf(stderr, 808 " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); 809 } else { 810 fprintf(stderr, 811 " Found along %s edge.\n", errorEdge); 812 } 813 } 814 return UNKNOWN_ERROR; 815 } 816 return NO_ERROR; 817 } 818 819 static void checkNinePatchSerialization(Res_png_9patch* inPatch, void* data) 820 { 821 size_t patchSize = inPatch->serializedSize(); 822 void* newData = malloc(patchSize); 823 memcpy(newData, data, patchSize); 824 Res_png_9patch* outPatch = inPatch->deserialize(newData); 825 // deserialization is done in place, so outPatch == newData 826 assert(outPatch == newData); 827 assert(outPatch->numXDivs == inPatch->numXDivs); 828 assert(outPatch->numYDivs == inPatch->numYDivs); 829 assert(outPatch->paddingLeft == inPatch->paddingLeft); 830 assert(outPatch->paddingRight == inPatch->paddingRight); 831 assert(outPatch->paddingTop == inPatch->paddingTop); 832 assert(outPatch->paddingBottom == inPatch->paddingBottom); 833 for (int i = 0; i < outPatch->numXDivs; i++) { 834 assert(outPatch->xDivs[i] == inPatch->xDivs[i]); 835 } 836 for (int i = 0; i < outPatch->numYDivs; i++) { 837 assert(outPatch->yDivs[i] == inPatch->yDivs[i]); 838 } 839 for (int i = 0; i < outPatch->numColors; i++) { 840 assert(outPatch->colors[i] == inPatch->colors[i]); 841 } 842 free(newData); 843 } 844 845 static void dump_image(int w, int h, png_bytepp rows, int color_type) 846 { 847 int i, j, rr, gg, bb, aa; 848 849 int bpp; 850 if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { 851 bpp = 1; 852 } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { 853 bpp = 2; 854 } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 855 // We use a padding byte even when there is no alpha 856 bpp = 4; 857 } else { 858 printf("Unknown color type %d.\n", color_type); 859 } 860 861 for (j = 0; j < h; j++) { 862 png_bytep row = rows[j]; 863 for (i = 0; i < w; i++) { 864 rr = row[0]; 865 gg = row[1]; 866 bb = row[2]; 867 aa = row[3]; 868 row += bpp; 869 870 if (i == 0) { 871 printf("Row %d:", j); 872 } 873 switch (bpp) { 874 case 1: 875 printf(" (%d)", rr); 876 break; 877 case 2: 878 printf(" (%d %d", rr, gg); 879 break; 880 case 3: 881 printf(" (%d %d %d)", rr, gg, bb); 882 break; 883 case 4: 884 printf(" (%d %d %d %d)", rr, gg, bb, aa); 885 break; 886 } 887 if (i == (w - 1)) { 888 NOISY(printf("\n")); 889 } 890 } 891 } 892 } 893 894 #define MAX(a,b) ((a)>(b)?(a):(b)) 895 #define ABS(a) ((a)<0?-(a):(a)) 896 897 static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, 898 png_colorp rgbPalette, png_bytep alphaPalette, 899 int *paletteEntries, bool *hasTransparency, int *colorType, 900 png_bytepp outRows) 901 { 902 int w = imageInfo.width; 903 int h = imageInfo.height; 904 int i, j, rr, gg, bb, aa, idx; 905 uint32_t colors[256], col; 906 int num_colors = 0; 907 int maxGrayDeviation = 0; 908 909 bool isOpaque = true; 910 bool isPalette = true; 911 bool isGrayscale = true; 912 913 // Scan the entire image and determine if: 914 // 1. Every pixel has R == G == B (grayscale) 915 // 2. Every pixel has A == 255 (opaque) 916 // 3. There are no more than 256 distinct RGBA colors 917 918 // NOISY(printf("Initial image data:\n")); 919 // dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); 920 921 for (j = 0; j < h; j++) { 922 png_bytep row = imageInfo.rows[j]; 923 png_bytep out = outRows[j]; 924 for (i = 0; i < w; i++) { 925 rr = *row++; 926 gg = *row++; 927 bb = *row++; 928 aa = *row++; 929 930 int odev = maxGrayDeviation; 931 maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); 932 maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); 933 maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); 934 if (maxGrayDeviation > odev) { 935 NOISY(printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", 936 maxGrayDeviation, i, j, rr, gg, bb, aa)); 937 } 938 939 // Check if image is really grayscale 940 if (isGrayscale) { 941 if (rr != gg || rr != bb) { 942 NOISY(printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", 943 i, j, rr, gg, bb, aa)); 944 isGrayscale = false; 945 } 946 } 947 948 // Check if image is really opaque 949 if (isOpaque) { 950 if (aa != 0xff) { 951 NOISY(printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", 952 i, j, rr, gg, bb, aa)); 953 isOpaque = false; 954 } 955 } 956 957 // Check if image is really <= 256 colors 958 if (isPalette) { 959 col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); 960 bool match = false; 961 for (idx = 0; idx < num_colors; idx++) { 962 if (colors[idx] == col) { 963 match = true; 964 break; 965 } 966 } 967 968 // Write the palette index for the pixel to outRows optimistically 969 // We might overwrite it later if we decide to encode as gray or 970 // gray + alpha 971 *out++ = idx; 972 if (!match) { 973 if (num_colors == 256) { 974 NOISY(printf("Found 257th color at %d, %d\n", i, j)); 975 isPalette = false; 976 } else { 977 colors[num_colors++] = col; 978 } 979 } 980 } 981 } 982 } 983 984 *paletteEntries = 0; 985 *hasTransparency = !isOpaque; 986 int bpp = isOpaque ? 3 : 4; 987 int paletteSize = w * h + bpp * num_colors; 988 989 NOISY(printf("isGrayscale = %s\n", isGrayscale ? "true" : "false")); 990 NOISY(printf("isOpaque = %s\n", isOpaque ? "true" : "false")); 991 NOISY(printf("isPalette = %s\n", isPalette ? "true" : "false")); 992 NOISY(printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", 993 paletteSize, 2 * w * h, bpp * w * h)); 994 NOISY(printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance)); 995 996 // Choose the best color type for the image. 997 // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel 998 // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations 999 // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA 1000 // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently 1001 // small, otherwise use COLOR_TYPE_RGB{_ALPHA} 1002 if (isGrayscale) { 1003 if (isOpaque) { 1004 *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel 1005 } else { 1006 // Use a simple heuristic to determine whether using a palette will 1007 // save space versus using gray + alpha for each pixel. 1008 // This doesn't take into account chunk overhead, filtering, LZ 1009 // compression, etc. 1010 if (isPalette && (paletteSize < 2 * w * h)) { 1011 *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color 1012 } else { 1013 *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel 1014 } 1015 } 1016 } else if (isPalette && (paletteSize < bpp * w * h)) { 1017 *colorType = PNG_COLOR_TYPE_PALETTE; 1018 } else { 1019 if (maxGrayDeviation <= grayscaleTolerance) { 1020 printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); 1021 *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; 1022 } else { 1023 *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; 1024 } 1025 } 1026 1027 // Perform postprocessing of the image or palette data based on the final 1028 // color type chosen 1029 1030 if (*colorType == PNG_COLOR_TYPE_PALETTE) { 1031 // Create separate RGB and Alpha palettes and set the number of colors 1032 *paletteEntries = num_colors; 1033 1034 // Create the RGB and alpha palettes 1035 for (int idx = 0; idx < num_colors; idx++) { 1036 col = colors[idx]; 1037 rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); 1038 rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); 1039 rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); 1040 alphaPalette[idx] = (png_byte) (col & 0xff); 1041 } 1042 } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { 1043 // If the image is gray or gray + alpha, compact the pixels into outRows 1044 for (j = 0; j < h; j++) { 1045 png_bytep row = imageInfo.rows[j]; 1046 png_bytep out = outRows[j]; 1047 for (i = 0; i < w; i++) { 1048 rr = *row++; 1049 gg = *row++; 1050 bb = *row++; 1051 aa = *row++; 1052 1053 if (isGrayscale) { 1054 *out++ = rr; 1055 } else { 1056 *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); 1057 } 1058 if (!isOpaque) { 1059 *out++ = aa; 1060 } 1061 } 1062 } 1063 } 1064 } 1065 1066 1067 static void write_png(const char* imageName, 1068 png_structp write_ptr, png_infop write_info, 1069 image_info& imageInfo, int grayscaleTolerance) 1070 { 1071 bool optimize = true; 1072 png_uint_32 width, height; 1073 int color_type; 1074 int bit_depth, interlace_type, compression_type; 1075 int i; 1076 1077 png_unknown_chunk unknowns[3]; 1078 unknowns[0].data = NULL; 1079 unknowns[1].data = NULL; 1080 unknowns[2].data = NULL; 1081 1082 png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * sizeof(png_bytep)); 1083 if (outRows == (png_bytepp) 0) { 1084 printf("Can't allocate output buffer!\n"); 1085 exit(1); 1086 } 1087 for (i = 0; i < (int) imageInfo.height; i++) { 1088 outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); 1089 if (outRows[i] == (png_bytep) 0) { 1090 printf("Can't allocate output buffer!\n"); 1091 exit(1); 1092 } 1093 } 1094 1095 png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); 1096 1097 NOISY(printf("Writing image %s: w = %d, h = %d\n", imageName, 1098 (int) imageInfo.width, (int) imageInfo.height)); 1099 1100 png_color rgbPalette[256]; 1101 png_byte alphaPalette[256]; 1102 bool hasTransparency; 1103 int paletteEntries; 1104 1105 analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, 1106 &paletteEntries, &hasTransparency, &color_type, outRows); 1107 1108 // If the image is a 9-patch, we need to preserve it as a ARGB file to make 1109 // sure the pixels will not be pre-dithered/clamped until we decide they are 1110 if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || 1111 color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { 1112 color_type = PNG_COLOR_TYPE_RGB_ALPHA; 1113 } 1114 1115 switch (color_type) { 1116 case PNG_COLOR_TYPE_PALETTE: 1117 NOISY(printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", 1118 imageName, paletteEntries, 1119 hasTransparency ? " (with alpha)" : "")); 1120 break; 1121 case PNG_COLOR_TYPE_GRAY: 1122 NOISY(printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName)); 1123 break; 1124 case PNG_COLOR_TYPE_GRAY_ALPHA: 1125 NOISY(printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName)); 1126 break; 1127 case PNG_COLOR_TYPE_RGB: 1128 NOISY(printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName)); 1129 break; 1130 case PNG_COLOR_TYPE_RGB_ALPHA: 1131 NOISY(printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName)); 1132 break; 1133 } 1134 1135 png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, 1136 8, color_type, PNG_INTERLACE_NONE, 1137 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); 1138 1139 if (color_type == PNG_COLOR_TYPE_PALETTE) { 1140 png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); 1141 if (hasTransparency) { 1142 png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); 1143 } 1144 png_set_filter(write_ptr, 0, PNG_NO_FILTERS); 1145 } else { 1146 png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); 1147 } 1148 1149 if (imageInfo.is9Patch) { 1150 int chunk_count = 2 + (imageInfo.haveLayoutBounds ? 1 : 0); 1151 int p_index = imageInfo.haveLayoutBounds ? 2 : 1; 1152 int b_index = 1; 1153 int o_index = 0; 1154 1155 // Chunks ordered thusly because older platforms depend on the base 9 patch data being last 1156 png_byte *chunk_names = imageInfo.haveLayoutBounds 1157 ? (png_byte*)"npOl\0npLb\0npTc\0" 1158 : (png_byte*)"npOl\0npTc"; 1159 1160 // base 9 patch data 1161 NOISY(printf("Adding 9-patch info...\n")); 1162 strcpy((char*)unknowns[p_index].name, "npTc"); 1163 unknowns[p_index].data = (png_byte*)imageInfo.serialize9patch(); 1164 unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); 1165 // TODO: remove the check below when everything works 1166 checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); 1167 1168 // automatically generated 9 patch outline data 1169 int chunk_size = sizeof(png_uint_32) * 6; 1170 strcpy((char*)unknowns[o_index].name, "npOl"); 1171 unknowns[o_index].data = (png_byte*) calloc(chunk_size, 1); 1172 png_byte outputData[chunk_size]; 1173 memcpy(&outputData, &imageInfo.outlineInsetsLeft, 4 * sizeof(png_uint_32)); 1174 ((float*) outputData)[4] = imageInfo.outlineRadius; 1175 ((png_uint_32*) outputData)[5] = imageInfo.outlineAlpha; 1176 memcpy(unknowns[o_index].data, &outputData, chunk_size); 1177 unknowns[o_index].size = chunk_size; 1178 1179 // optional optical inset / layout bounds data 1180 if (imageInfo.haveLayoutBounds) { 1181 int chunk_size = sizeof(png_uint_32) * 4; 1182 strcpy((char*)unknowns[b_index].name, "npLb"); 1183 unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); 1184 memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); 1185 unknowns[b_index].size = chunk_size; 1186 } 1187 1188 for (int i = 0; i < chunk_count; i++) { 1189 unknowns[i].location = PNG_HAVE_PLTE; 1190 } 1191 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1192 chunk_names, chunk_count); 1193 png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); 1194 #if PNG_LIBPNG_VER < 10600 1195 /* Deal with unknown chunk location bug in 1.5.x and earlier */ 1196 png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); 1197 if (imageInfo.haveLayoutBounds) { 1198 png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); 1199 } 1200 #endif 1201 } 1202 1203 1204 png_write_info(write_ptr, write_info); 1205 1206 png_bytepp rows; 1207 if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 1208 if (color_type == PNG_COLOR_TYPE_RGB) { 1209 png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); 1210 } 1211 rows = imageInfo.rows; 1212 } else { 1213 rows = outRows; 1214 } 1215 png_write_image(write_ptr, rows); 1216 1217 // NOISY(printf("Final image data:\n")); 1218 // dump_image(imageInfo.width, imageInfo.height, rows, color_type); 1219 1220 png_write_end(write_ptr, write_info); 1221 1222 for (i = 0; i < (int) imageInfo.height; i++) { 1223 free(outRows[i]); 1224 } 1225 free(outRows); 1226 free(unknowns[0].data); 1227 free(unknowns[1].data); 1228 free(unknowns[2].data); 1229 1230 png_get_IHDR(write_ptr, write_info, &width, &height, 1231 &bit_depth, &color_type, &interlace_type, 1232 &compression_type, NULL); 1233 1234 NOISY(printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 1235 (int)width, (int)height, bit_depth, color_type, interlace_type, 1236 compression_type)); 1237 } 1238 1239 status_t preProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1240 const sp<AaptFile>& file, String8* outNewLeafName) 1241 { 1242 String8 ext(file->getPath().getPathExtension()); 1243 1244 // We currently only process PNG images. 1245 if (strcmp(ext.string(), ".png") != 0) { 1246 return NO_ERROR; 1247 } 1248 1249 // Example of renaming a file: 1250 //*outNewLeafName = file->getPath().getBasePath().getFileName(); 1251 //outNewLeafName->append(".nupng"); 1252 1253 String8 printableName(file->getPrintableSource()); 1254 1255 if (bundle->getVerbose()) { 1256 printf("Processing image: %s\n", printableName.string()); 1257 } 1258 1259 png_structp read_ptr = NULL; 1260 png_infop read_info = NULL; 1261 FILE* fp; 1262 1263 image_info imageInfo; 1264 1265 png_structp write_ptr = NULL; 1266 png_infop write_info = NULL; 1267 1268 status_t error = UNKNOWN_ERROR; 1269 1270 const size_t nameLen = file->getPath().length(); 1271 1272 fp = fopen(file->getSourceFile().string(), "rb"); 1273 if (fp == NULL) { 1274 fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); 1275 goto bail; 1276 } 1277 1278 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1279 (png_error_ptr)NULL); 1280 if (!read_ptr) { 1281 goto bail; 1282 } 1283 1284 read_info = png_create_info_struct(read_ptr); 1285 if (!read_info) { 1286 goto bail; 1287 } 1288 1289 if (setjmp(png_jmpbuf(read_ptr))) { 1290 goto bail; 1291 } 1292 1293 png_init_io(read_ptr, fp); 1294 1295 read_png(printableName.string(), read_ptr, read_info, &imageInfo); 1296 1297 if (nameLen > 6) { 1298 const char* name = file->getPath().string(); 1299 if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { 1300 if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { 1301 goto bail; 1302 } 1303 } 1304 } 1305 1306 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1307 (png_error_ptr)NULL); 1308 if (!write_ptr) 1309 { 1310 goto bail; 1311 } 1312 1313 write_info = png_create_info_struct(write_ptr); 1314 if (!write_info) 1315 { 1316 goto bail; 1317 } 1318 1319 png_set_write_fn(write_ptr, (void*)file.get(), 1320 png_write_aapt_file, png_flush_aapt_file); 1321 1322 if (setjmp(png_jmpbuf(write_ptr))) 1323 { 1324 goto bail; 1325 } 1326 1327 write_png(printableName.string(), write_ptr, write_info, imageInfo, 1328 bundle->getGrayscaleTolerance()); 1329 1330 error = NO_ERROR; 1331 1332 if (bundle->getVerbose()) { 1333 fseek(fp, 0, SEEK_END); 1334 size_t oldSize = (size_t)ftell(fp); 1335 size_t newSize = file->getSize(); 1336 float factor = ((float)newSize)/oldSize; 1337 int percent = (int)(factor*100); 1338 printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); 1339 } 1340 1341 bail: 1342 if (read_ptr) { 1343 png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); 1344 } 1345 if (fp) { 1346 fclose(fp); 1347 } 1348 if (write_ptr) { 1349 png_destroy_write_struct(&write_ptr, &write_info); 1350 } 1351 1352 if (error != NO_ERROR) { 1353 fprintf(stderr, "ERROR: Failure processing PNG image %s\n", 1354 file->getPrintableSource().string()); 1355 } 1356 return error; 1357 } 1358 1359 status_t preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) 1360 { 1361 png_structp read_ptr = NULL; 1362 png_infop read_info = NULL; 1363 1364 FILE* fp; 1365 1366 image_info imageInfo; 1367 1368 png_structp write_ptr = NULL; 1369 png_infop write_info = NULL; 1370 1371 status_t error = UNKNOWN_ERROR; 1372 1373 if (bundle->getVerbose()) { 1374 printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); 1375 } 1376 1377 // Get a file handler to read from 1378 fp = fopen(source.string(),"rb"); 1379 if (fp == NULL) { 1380 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); 1381 return error; 1382 } 1383 1384 // Call libpng to get a struct to read image data into 1385 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1386 if (!read_ptr) { 1387 fclose(fp); 1388 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1389 return error; 1390 } 1391 1392 // Call libpng to get a struct to read image info into 1393 read_info = png_create_info_struct(read_ptr); 1394 if (!read_info) { 1395 fclose(fp); 1396 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1397 return error; 1398 } 1399 1400 // Set a jump point for libpng to long jump back to on error 1401 if (setjmp(png_jmpbuf(read_ptr))) { 1402 fclose(fp); 1403 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1404 return error; 1405 } 1406 1407 // Set up libpng to read from our file. 1408 png_init_io(read_ptr,fp); 1409 1410 // Actually read data from the file 1411 read_png(source.string(), read_ptr, read_info, &imageInfo); 1412 1413 // We're done reading so we can clean up 1414 // Find old file size before releasing handle 1415 fseek(fp, 0, SEEK_END); 1416 size_t oldSize = (size_t)ftell(fp); 1417 fclose(fp); 1418 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1419 1420 // Check to see if we're dealing with a 9-patch 1421 // If we are, process appropriately 1422 if (source.getBasePath().getPathExtension() == ".9") { 1423 if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { 1424 return error; 1425 } 1426 } 1427 1428 // Call libpng to create a structure to hold the processed image data 1429 // that can be written to disk 1430 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1431 if (!write_ptr) { 1432 png_destroy_write_struct(&write_ptr, &write_info); 1433 return error; 1434 } 1435 1436 // Call libpng to create a structure to hold processed image info that can 1437 // be written to disk 1438 write_info = png_create_info_struct(write_ptr); 1439 if (!write_info) { 1440 png_destroy_write_struct(&write_ptr, &write_info); 1441 return error; 1442 } 1443 1444 // Open up our destination file for writing 1445 fp = fopen(dest.string(), "wb"); 1446 if (!fp) { 1447 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); 1448 png_destroy_write_struct(&write_ptr, &write_info); 1449 return error; 1450 } 1451 1452 // Set up libpng to write to our file 1453 png_init_io(write_ptr, fp); 1454 1455 // Set up a jump for libpng to long jump back on on errors 1456 if (setjmp(png_jmpbuf(write_ptr))) { 1457 fclose(fp); 1458 png_destroy_write_struct(&write_ptr, &write_info); 1459 return error; 1460 } 1461 1462 // Actually write out to the new png 1463 write_png(dest.string(), write_ptr, write_info, imageInfo, 1464 bundle->getGrayscaleTolerance()); 1465 1466 if (bundle->getVerbose()) { 1467 // Find the size of our new file 1468 FILE* reader = fopen(dest.string(), "rb"); 1469 fseek(reader, 0, SEEK_END); 1470 size_t newSize = (size_t)ftell(reader); 1471 fclose(reader); 1472 1473 float factor = ((float)newSize)/oldSize; 1474 int percent = (int)(factor*100); 1475 printf(" (processed image to cache entry %s: %d%% size of source)\n", 1476 dest.string(), percent); 1477 } 1478 1479 //Clean up 1480 fclose(fp); 1481 png_destroy_write_struct(&write_ptr, &write_info); 1482 1483 return NO_ERROR; 1484 } 1485 1486 status_t postProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1487 ResourceTable* table, const sp<AaptFile>& file) 1488 { 1489 String8 ext(file->getPath().getPathExtension()); 1490 1491 // At this point, now that we have all the resource data, all we need to 1492 // do is compile XML files. 1493 if (strcmp(ext.string(), ".xml") == 0) { 1494 String16 resourceName(parseResourceName(file->getSourceFile().getPathLeaf())); 1495 return compileXmlFile(bundle, assets, resourceName, file, table); 1496 } 1497 1498 return NO_ERROR; 1499 } 1500
