Images.cpp revision 77b5cad3efedd20f2b7cc14d87ccce1b0261960a
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 // 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 92static 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 98static 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 175enum { 176 TICK_TYPE_NONE, 177 TICK_TYPE_TICK, 178 TICK_TYPE_LAYOUT_BOUNDS, 179 TICK_TYPE_BOTH 180}; 181 182static 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 228enum { 229 TICK_START, 230 TICK_INSIDE_1, 231 TICK_OUTSIDE_1 232}; 233 234static 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 283static 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 332static 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 370static 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 408static 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 427static 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 437static 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 447static 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 // radius = 1 / (sqrt(2) - 1) * inset 490 image->outlineRadius = 2.4142f * diagonalInset; 491 492 NOISY(printf("outline insets %d %d %d %d, rad %f, alpha %x\n", 493 image->outlineInsetsLeft, 494 image->outlineInsetsTop, 495 image->outlineInsetsRight, 496 image->outlineInsetsBottom, 497 image->outlineRadius, 498 image->outlineAlpha)); 499} 500 501 502static uint32_t get_color( 503 png_bytepp rows, int left, int top, int right, int bottom) 504{ 505 png_bytep color = rows[top] + left*4; 506 507 if (left > right || top > bottom) { 508 return Res_png_9patch::TRANSPARENT_COLOR; 509 } 510 511 while (top <= bottom) { 512 for (int i = left; i <= right; i++) { 513 png_bytep p = rows[top]+i*4; 514 if (color[3] == 0) { 515 if (p[3] != 0) { 516 return Res_png_9patch::NO_COLOR; 517 } 518 } else if (p[0] != color[0] || p[1] != color[1] 519 || p[2] != color[2] || p[3] != color[3]) { 520 return Res_png_9patch::NO_COLOR; 521 } 522 } 523 top++; 524 } 525 526 if (color[3] == 0) { 527 return Res_png_9patch::TRANSPARENT_COLOR; 528 } 529 return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; 530} 531 532static void select_patch( 533 int which, int front, int back, int size, int* start, int* end) 534{ 535 switch (which) { 536 case 0: 537 *start = 0; 538 *end = front-1; 539 break; 540 case 1: 541 *start = front; 542 *end = back-1; 543 break; 544 case 2: 545 *start = back; 546 *end = size-1; 547 break; 548 } 549} 550 551static uint32_t get_color(image_info* image, int hpatch, int vpatch) 552{ 553 int left, right, top, bottom; 554 select_patch( 555 hpatch, image->xDivs[0], image->xDivs[1], 556 image->width, &left, &right); 557 select_patch( 558 vpatch, image->yDivs[0], image->yDivs[1], 559 image->height, &top, &bottom); 560 //printf("Selecting h=%d v=%d: (%d,%d)-(%d,%d)\n", 561 // hpatch, vpatch, left, top, right, bottom); 562 const uint32_t c = get_color(image->rows, left, top, right, bottom); 563 NOISY(printf("Color in (%d,%d)-(%d,%d): #%08x\n", left, top, right, bottom, c)); 564 return c; 565} 566 567static status_t do_9patch(const char* imageName, image_info* image) 568{ 569 image->is9Patch = true; 570 571 int W = image->width; 572 int H = image->height; 573 int i, j; 574 575 int maxSizeXDivs = W * sizeof(int32_t); 576 int maxSizeYDivs = H * sizeof(int32_t); 577 int32_t* xDivs = image->xDivs = (int32_t*) malloc(maxSizeXDivs); 578 int32_t* yDivs = image->yDivs = (int32_t*) malloc(maxSizeYDivs); 579 uint8_t numXDivs = 0; 580 uint8_t numYDivs = 0; 581 582 int8_t numColors; 583 int numRows; 584 int numCols; 585 int top; 586 int left; 587 int right; 588 int bottom; 589 memset(xDivs, -1, maxSizeXDivs); 590 memset(yDivs, -1, maxSizeYDivs); 591 image->info9Patch.paddingLeft = image->info9Patch.paddingRight = 592 image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; 593 594 image->layoutBoundsLeft = image->layoutBoundsRight = 595 image->layoutBoundsTop = image->layoutBoundsBottom = 0; 596 597 png_bytep p = image->rows[0]; 598 bool transparent = p[3] == 0; 599 bool hasColor = false; 600 601 const char* errorMsg = NULL; 602 int errorPixel = -1; 603 const char* errorEdge = NULL; 604 605 int colorIndex = 0; 606 607 // Validate size... 608 if (W < 3 || H < 3) { 609 errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; 610 goto getout; 611 } 612 613 // Validate frame... 614 if (!transparent && 615 (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { 616 errorMsg = "Must have one-pixel frame that is either transparent or white"; 617 goto getout; 618 } 619 620 // Find left and right of sizing areas... 621 if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], 622 &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { 623 errorPixel = xDivs[0]; 624 errorEdge = "top"; 625 goto getout; 626 } 627 628 // Find top and bottom of sizing areas... 629 if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], 630 &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { 631 errorPixel = yDivs[0]; 632 errorEdge = "left"; 633 goto getout; 634 } 635 636 // Copy patch size data into image... 637 image->info9Patch.numXDivs = numXDivs; 638 image->info9Patch.numYDivs = numYDivs; 639 640 // Find left and right of padding area... 641 if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, 642 &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { 643 errorPixel = image->info9Patch.paddingLeft; 644 errorEdge = "bottom"; 645 goto getout; 646 } 647 648 // Find top and bottom of padding area... 649 if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, 650 &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { 651 errorPixel = image->info9Patch.paddingTop; 652 errorEdge = "right"; 653 goto getout; 654 } 655 656 // Find left and right of layout padding... 657 get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, 658 &image->layoutBoundsLeft, 659 &image->layoutBoundsRight, &errorMsg); 660 661 get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, 662 &image->layoutBoundsTop, 663 &image->layoutBoundsBottom, &errorMsg); 664 665 image->haveLayoutBounds = image->layoutBoundsLeft != 0 666 || image->layoutBoundsRight != 0 667 || image->layoutBoundsTop != 0 668 || image->layoutBoundsBottom != 0; 669 670 if (image->haveLayoutBounds) { 671 NOISY(printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, 672 image->layoutBoundsRight, image->layoutBoundsBottom)); 673 } 674 675 // use opacity of pixels to estimate the round rect outline 676 get_outline(image); 677 678 // If padding is not yet specified, take values from size. 679 if (image->info9Patch.paddingLeft < 0) { 680 image->info9Patch.paddingLeft = xDivs[0]; 681 image->info9Patch.paddingRight = W - 2 - xDivs[1]; 682 } else { 683 // Adjust value to be correct! 684 image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; 685 } 686 if (image->info9Patch.paddingTop < 0) { 687 image->info9Patch.paddingTop = yDivs[0]; 688 image->info9Patch.paddingBottom = H - 2 - yDivs[1]; 689 } else { 690 // Adjust value to be correct! 691 image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; 692 } 693 694 NOISY(printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, 695 xDivs[0], xDivs[1], 696 yDivs[0], yDivs[1])); 697 NOISY(printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, 698 image->info9Patch.paddingLeft, image->info9Patch.paddingRight, 699 image->info9Patch.paddingTop, image->info9Patch.paddingBottom)); 700 701 // Remove frame from image. 702 image->rows = (png_bytepp)malloc((H-2) * sizeof(png_bytep)); 703 for (i=0; i<(H-2); i++) { 704 image->rows[i] = image->allocRows[i+1]; 705 memmove(image->rows[i], image->rows[i]+4, (W-2)*4); 706 } 707 image->width -= 2; 708 W = image->width; 709 image->height -= 2; 710 H = image->height; 711 712 // Figure out the number of rows and columns in the N-patch 713 numCols = numXDivs + 1; 714 if (xDivs[0] == 0) { // Column 1 is strechable 715 numCols--; 716 } 717 if (xDivs[numXDivs - 1] == W) { 718 numCols--; 719 } 720 numRows = numYDivs + 1; 721 if (yDivs[0] == 0) { // Row 1 is strechable 722 numRows--; 723 } 724 if (yDivs[numYDivs - 1] == H) { 725 numRows--; 726 } 727 728 // Make sure the amount of rows and columns will fit in the number of 729 // colors we can use in the 9-patch format. 730 if (numRows * numCols > 0x7F) { 731 errorMsg = "Too many rows and columns in 9-patch perimeter"; 732 goto getout; 733 } 734 735 numColors = numRows * numCols; 736 image->info9Patch.numColors = numColors; 737 image->colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); 738 739 // Fill in color information for each patch. 740 741 uint32_t c; 742 top = 0; 743 744 // The first row always starts with the top being at y=0 and the bottom 745 // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case 746 // the first row is stretchable along the Y axis, otherwise it is fixed. 747 // The last row always ends with the bottom being bitmap.height and the top 748 // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or 749 // yDivs[numYDivs-1]. In the former case the last row is stretchable along 750 // the Y axis, otherwise it is fixed. 751 // 752 // The first and last columns are similarly treated with respect to the X 753 // axis. 754 // 755 // The above is to help explain some of the special casing that goes on the 756 // code below. 757 758 // The initial yDiv and whether the first row is considered stretchable or 759 // not depends on whether yDiv[0] was zero or not. 760 for (j = (yDivs[0] == 0 ? 1 : 0); 761 j <= numYDivs && top < H; 762 j++) { 763 if (j == numYDivs) { 764 bottom = H; 765 } else { 766 bottom = yDivs[j]; 767 } 768 left = 0; 769 // The initial xDiv and whether the first column is considered 770 // stretchable or not depends on whether xDiv[0] was zero or not. 771 for (i = xDivs[0] == 0 ? 1 : 0; 772 i <= numXDivs && left < W; 773 i++) { 774 if (i == numXDivs) { 775 right = W; 776 } else { 777 right = xDivs[i]; 778 } 779 c = get_color(image->rows, left, top, right - 1, bottom - 1); 780 image->colors[colorIndex++] = c; 781 NOISY(if (c != Res_png_9patch::NO_COLOR) hasColor = true); 782 left = right; 783 } 784 top = bottom; 785 } 786 787 assert(colorIndex == numColors); 788 789 for (i=0; i<numColors; i++) { 790 if (hasColor) { 791 if (i == 0) printf("Colors in %s:\n ", imageName); 792 printf(" #%08x", image->colors[i]); 793 if (i == numColors - 1) printf("\n"); 794 } 795 } 796getout: 797 if (errorMsg) { 798 fprintf(stderr, 799 "ERROR: 9-patch image %s malformed.\n" 800 " %s.\n", imageName, errorMsg); 801 if (errorEdge != NULL) { 802 if (errorPixel >= 0) { 803 fprintf(stderr, 804 " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); 805 } else { 806 fprintf(stderr, 807 " Found along %s edge.\n", errorEdge); 808 } 809 } 810 return UNKNOWN_ERROR; 811 } 812 return NO_ERROR; 813} 814 815static void checkNinePatchSerialization(Res_png_9patch* inPatch, void* data) 816{ 817 size_t patchSize = inPatch->serializedSize(); 818 void* newData = malloc(patchSize); 819 memcpy(newData, data, patchSize); 820 Res_png_9patch* outPatch = inPatch->deserialize(newData); 821 // deserialization is done in place, so outPatch == newData 822 assert(outPatch == newData); 823 assert(outPatch->numXDivs == inPatch->numXDivs); 824 assert(outPatch->numYDivs == inPatch->numYDivs); 825 assert(outPatch->paddingLeft == inPatch->paddingLeft); 826 assert(outPatch->paddingRight == inPatch->paddingRight); 827 assert(outPatch->paddingTop == inPatch->paddingTop); 828 assert(outPatch->paddingBottom == inPatch->paddingBottom); 829 for (int i = 0; i < outPatch->numXDivs; i++) { 830 assert(outPatch->xDivs[i] == inPatch->xDivs[i]); 831 } 832 for (int i = 0; i < outPatch->numYDivs; i++) { 833 assert(outPatch->yDivs[i] == inPatch->yDivs[i]); 834 } 835 for (int i = 0; i < outPatch->numColors; i++) { 836 assert(outPatch->colors[i] == inPatch->colors[i]); 837 } 838 free(newData); 839} 840 841static void dump_image(int w, int h, png_bytepp rows, int color_type) 842{ 843 int i, j, rr, gg, bb, aa; 844 845 int bpp; 846 if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { 847 bpp = 1; 848 } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { 849 bpp = 2; 850 } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 851 // We use a padding byte even when there is no alpha 852 bpp = 4; 853 } else { 854 printf("Unknown color type %d.\n", color_type); 855 } 856 857 for (j = 0; j < h; j++) { 858 png_bytep row = rows[j]; 859 for (i = 0; i < w; i++) { 860 rr = row[0]; 861 gg = row[1]; 862 bb = row[2]; 863 aa = row[3]; 864 row += bpp; 865 866 if (i == 0) { 867 printf("Row %d:", j); 868 } 869 switch (bpp) { 870 case 1: 871 printf(" (%d)", rr); 872 break; 873 case 2: 874 printf(" (%d %d", rr, gg); 875 break; 876 case 3: 877 printf(" (%d %d %d)", rr, gg, bb); 878 break; 879 case 4: 880 printf(" (%d %d %d %d)", rr, gg, bb, aa); 881 break; 882 } 883 if (i == (w - 1)) { 884 NOISY(printf("\n")); 885 } 886 } 887 } 888} 889 890#define MAX(a,b) ((a)>(b)?(a):(b)) 891#define ABS(a) ((a)<0?-(a):(a)) 892 893static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, 894 png_colorp rgbPalette, png_bytep alphaPalette, 895 int *paletteEntries, bool *hasTransparency, int *colorType, 896 png_bytepp outRows) 897{ 898 int w = imageInfo.width; 899 int h = imageInfo.height; 900 int i, j, rr, gg, bb, aa, idx; 901 uint32_t colors[256], col; 902 int num_colors = 0; 903 int maxGrayDeviation = 0; 904 905 bool isOpaque = true; 906 bool isPalette = true; 907 bool isGrayscale = true; 908 909 // Scan the entire image and determine if: 910 // 1. Every pixel has R == G == B (grayscale) 911 // 2. Every pixel has A == 255 (opaque) 912 // 3. There are no more than 256 distinct RGBA colors 913 914 // NOISY(printf("Initial image data:\n")); 915 // dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); 916 917 for (j = 0; j < h; j++) { 918 png_bytep row = imageInfo.rows[j]; 919 png_bytep out = outRows[j]; 920 for (i = 0; i < w; i++) { 921 rr = *row++; 922 gg = *row++; 923 bb = *row++; 924 aa = *row++; 925 926 int odev = maxGrayDeviation; 927 maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); 928 maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); 929 maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); 930 if (maxGrayDeviation > odev) { 931 NOISY(printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", 932 maxGrayDeviation, i, j, rr, gg, bb, aa)); 933 } 934 935 // Check if image is really grayscale 936 if (isGrayscale) { 937 if (rr != gg || rr != bb) { 938 NOISY(printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", 939 i, j, rr, gg, bb, aa)); 940 isGrayscale = false; 941 } 942 } 943 944 // Check if image is really opaque 945 if (isOpaque) { 946 if (aa != 0xff) { 947 NOISY(printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", 948 i, j, rr, gg, bb, aa)); 949 isOpaque = false; 950 } 951 } 952 953 // Check if image is really <= 256 colors 954 if (isPalette) { 955 col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); 956 bool match = false; 957 for (idx = 0; idx < num_colors; idx++) { 958 if (colors[idx] == col) { 959 match = true; 960 break; 961 } 962 } 963 964 // Write the palette index for the pixel to outRows optimistically 965 // We might overwrite it later if we decide to encode as gray or 966 // gray + alpha 967 *out++ = idx; 968 if (!match) { 969 if (num_colors == 256) { 970 NOISY(printf("Found 257th color at %d, %d\n", i, j)); 971 isPalette = false; 972 } else { 973 colors[num_colors++] = col; 974 } 975 } 976 } 977 } 978 } 979 980 *paletteEntries = 0; 981 *hasTransparency = !isOpaque; 982 int bpp = isOpaque ? 3 : 4; 983 int paletteSize = w * h + bpp * num_colors; 984 985 NOISY(printf("isGrayscale = %s\n", isGrayscale ? "true" : "false")); 986 NOISY(printf("isOpaque = %s\n", isOpaque ? "true" : "false")); 987 NOISY(printf("isPalette = %s\n", isPalette ? "true" : "false")); 988 NOISY(printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", 989 paletteSize, 2 * w * h, bpp * w * h)); 990 NOISY(printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance)); 991 992 // Choose the best color type for the image. 993 // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel 994 // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations 995 // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA 996 // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently 997 // small, otherwise use COLOR_TYPE_RGB{_ALPHA} 998 if (isGrayscale) { 999 if (isOpaque) { 1000 *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel 1001 } else { 1002 // Use a simple heuristic to determine whether using a palette will 1003 // save space versus using gray + alpha for each pixel. 1004 // This doesn't take into account chunk overhead, filtering, LZ 1005 // compression, etc. 1006 if (isPalette && (paletteSize < 2 * w * h)) { 1007 *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color 1008 } else { 1009 *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel 1010 } 1011 } 1012 } else if (isPalette && (paletteSize < bpp * w * h)) { 1013 *colorType = PNG_COLOR_TYPE_PALETTE; 1014 } else { 1015 if (maxGrayDeviation <= grayscaleTolerance) { 1016 printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); 1017 *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; 1018 } else { 1019 *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; 1020 } 1021 } 1022 1023 // Perform postprocessing of the image or palette data based on the final 1024 // color type chosen 1025 1026 if (*colorType == PNG_COLOR_TYPE_PALETTE) { 1027 // Create separate RGB and Alpha palettes and set the number of colors 1028 *paletteEntries = num_colors; 1029 1030 // Create the RGB and alpha palettes 1031 for (int idx = 0; idx < num_colors; idx++) { 1032 col = colors[idx]; 1033 rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); 1034 rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); 1035 rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); 1036 alphaPalette[idx] = (png_byte) (col & 0xff); 1037 } 1038 } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { 1039 // If the image is gray or gray + alpha, compact the pixels into outRows 1040 for (j = 0; j < h; j++) { 1041 png_bytep row = imageInfo.rows[j]; 1042 png_bytep out = outRows[j]; 1043 for (i = 0; i < w; i++) { 1044 rr = *row++; 1045 gg = *row++; 1046 bb = *row++; 1047 aa = *row++; 1048 1049 if (isGrayscale) { 1050 *out++ = rr; 1051 } else { 1052 *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); 1053 } 1054 if (!isOpaque) { 1055 *out++ = aa; 1056 } 1057 } 1058 } 1059 } 1060} 1061 1062 1063static void write_png(const char* imageName, 1064 png_structp write_ptr, png_infop write_info, 1065 image_info& imageInfo, int grayscaleTolerance) 1066{ 1067 bool optimize = true; 1068 png_uint_32 width, height; 1069 int color_type; 1070 int bit_depth, interlace_type, compression_type; 1071 int i; 1072 1073 png_unknown_chunk unknowns[3]; 1074 unknowns[0].data = NULL; 1075 unknowns[1].data = NULL; 1076 unknowns[2].data = NULL; 1077 1078 png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * sizeof(png_bytep)); 1079 if (outRows == (png_bytepp) 0) { 1080 printf("Can't allocate output buffer!\n"); 1081 exit(1); 1082 } 1083 for (i = 0; i < (int) imageInfo.height; i++) { 1084 outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); 1085 if (outRows[i] == (png_bytep) 0) { 1086 printf("Can't allocate output buffer!\n"); 1087 exit(1); 1088 } 1089 } 1090 1091 png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); 1092 1093 NOISY(printf("Writing image %s: w = %d, h = %d\n", imageName, 1094 (int) imageInfo.width, (int) imageInfo.height)); 1095 1096 png_color rgbPalette[256]; 1097 png_byte alphaPalette[256]; 1098 bool hasTransparency; 1099 int paletteEntries; 1100 1101 analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, 1102 &paletteEntries, &hasTransparency, &color_type, outRows); 1103 1104 // If the image is a 9-patch, we need to preserve it as a ARGB file to make 1105 // sure the pixels will not be pre-dithered/clamped until we decide they are 1106 if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || 1107 color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { 1108 color_type = PNG_COLOR_TYPE_RGB_ALPHA; 1109 } 1110 1111 switch (color_type) { 1112 case PNG_COLOR_TYPE_PALETTE: 1113 NOISY(printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", 1114 imageName, paletteEntries, 1115 hasTransparency ? " (with alpha)" : "")); 1116 break; 1117 case PNG_COLOR_TYPE_GRAY: 1118 NOISY(printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName)); 1119 break; 1120 case PNG_COLOR_TYPE_GRAY_ALPHA: 1121 NOISY(printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName)); 1122 break; 1123 case PNG_COLOR_TYPE_RGB: 1124 NOISY(printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName)); 1125 break; 1126 case PNG_COLOR_TYPE_RGB_ALPHA: 1127 NOISY(printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName)); 1128 break; 1129 } 1130 1131 png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, 1132 8, color_type, PNG_INTERLACE_NONE, 1133 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); 1134 1135 if (color_type == PNG_COLOR_TYPE_PALETTE) { 1136 png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); 1137 if (hasTransparency) { 1138 png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); 1139 } 1140 png_set_filter(write_ptr, 0, PNG_NO_FILTERS); 1141 } else { 1142 png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); 1143 } 1144 1145 if (imageInfo.is9Patch) { 1146 int chunk_count = 2 + (imageInfo.haveLayoutBounds ? 1 : 0); 1147 int p_index = imageInfo.haveLayoutBounds ? 2 : 1; 1148 int b_index = 1; 1149 int o_index = 0; 1150 1151 // Chunks ordered thusly because older platforms depend on the base 9 patch data being last 1152 png_byte *chunk_names = imageInfo.haveLayoutBounds 1153 ? (png_byte*)"npOl\0npLb\0npTc\0" 1154 : (png_byte*)"npOl\0npTc"; 1155 1156 // base 9 patch data 1157 NOISY(printf("Adding 9-patch info...\n")); 1158 strcpy((char*)unknowns[p_index].name, "npTc"); 1159 unknowns[p_index].data = (png_byte*)imageInfo.serialize9patch(); 1160 unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); 1161 // TODO: remove the check below when everything works 1162 checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); 1163 1164 // automatically generated 9 patch outline data 1165 int chunk_size = sizeof(png_uint_32) * 6; 1166 strcpy((char*)unknowns[o_index].name, "npOl"); 1167 unknowns[o_index].data = (png_byte*) calloc(chunk_size, 1); 1168 png_byte outputData[chunk_size]; 1169 memcpy(&outputData, &imageInfo.outlineInsetsLeft, 4 * sizeof(png_uint_32)); 1170 ((float*) outputData)[4] = imageInfo.outlineRadius; 1171 ((png_uint_32*) outputData)[5] = imageInfo.outlineAlpha; 1172 memcpy(unknowns[o_index].data, &outputData, chunk_size); 1173 unknowns[o_index].size = chunk_size; 1174 1175 // optional optical inset / layout bounds data 1176 if (imageInfo.haveLayoutBounds) { 1177 int chunk_size = sizeof(png_uint_32) * 4; 1178 strcpy((char*)unknowns[b_index].name, "npLb"); 1179 unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); 1180 memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); 1181 unknowns[b_index].size = chunk_size; 1182 } 1183 1184 for (int i = 0; i < chunk_count; i++) { 1185 unknowns[i].location = PNG_HAVE_PLTE; 1186 } 1187 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1188 chunk_names, chunk_count); 1189 png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); 1190#if PNG_LIBPNG_VER < 10600 1191 /* Deal with unknown chunk location bug in 1.5.x and earlier */ 1192 png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); 1193 if (imageInfo.haveLayoutBounds) { 1194 png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); 1195 } 1196#endif 1197 } 1198 1199 1200 png_write_info(write_ptr, write_info); 1201 1202 png_bytepp rows; 1203 if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 1204 if (color_type == PNG_COLOR_TYPE_RGB) { 1205 png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); 1206 } 1207 rows = imageInfo.rows; 1208 } else { 1209 rows = outRows; 1210 } 1211 png_write_image(write_ptr, rows); 1212 1213// NOISY(printf("Final image data:\n")); 1214// dump_image(imageInfo.width, imageInfo.height, rows, color_type); 1215 1216 png_write_end(write_ptr, write_info); 1217 1218 for (i = 0; i < (int) imageInfo.height; i++) { 1219 free(outRows[i]); 1220 } 1221 free(outRows); 1222 free(unknowns[0].data); 1223 free(unknowns[1].data); 1224 free(unknowns[2].data); 1225 1226 png_get_IHDR(write_ptr, write_info, &width, &height, 1227 &bit_depth, &color_type, &interlace_type, 1228 &compression_type, NULL); 1229 1230 NOISY(printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 1231 (int)width, (int)height, bit_depth, color_type, interlace_type, 1232 compression_type)); 1233} 1234 1235status_t preProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1236 const sp<AaptFile>& file, String8* outNewLeafName) 1237{ 1238 String8 ext(file->getPath().getPathExtension()); 1239 1240 // We currently only process PNG images. 1241 if (strcmp(ext.string(), ".png") != 0) { 1242 return NO_ERROR; 1243 } 1244 1245 // Example of renaming a file: 1246 //*outNewLeafName = file->getPath().getBasePath().getFileName(); 1247 //outNewLeafName->append(".nupng"); 1248 1249 String8 printableName(file->getPrintableSource()); 1250 1251 if (bundle->getVerbose()) { 1252 printf("Processing image: %s\n", printableName.string()); 1253 } 1254 1255 png_structp read_ptr = NULL; 1256 png_infop read_info = NULL; 1257 FILE* fp; 1258 1259 image_info imageInfo; 1260 1261 png_structp write_ptr = NULL; 1262 png_infop write_info = NULL; 1263 1264 status_t error = UNKNOWN_ERROR; 1265 1266 const size_t nameLen = file->getPath().length(); 1267 1268 fp = fopen(file->getSourceFile().string(), "rb"); 1269 if (fp == NULL) { 1270 fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); 1271 goto bail; 1272 } 1273 1274 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1275 (png_error_ptr)NULL); 1276 if (!read_ptr) { 1277 goto bail; 1278 } 1279 1280 read_info = png_create_info_struct(read_ptr); 1281 if (!read_info) { 1282 goto bail; 1283 } 1284 1285 if (setjmp(png_jmpbuf(read_ptr))) { 1286 goto bail; 1287 } 1288 1289 png_init_io(read_ptr, fp); 1290 1291 read_png(printableName.string(), read_ptr, read_info, &imageInfo); 1292 1293 if (nameLen > 6) { 1294 const char* name = file->getPath().string(); 1295 if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { 1296 if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { 1297 goto bail; 1298 } 1299 } 1300 } 1301 1302 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1303 (png_error_ptr)NULL); 1304 if (!write_ptr) 1305 { 1306 goto bail; 1307 } 1308 1309 write_info = png_create_info_struct(write_ptr); 1310 if (!write_info) 1311 { 1312 goto bail; 1313 } 1314 1315 png_set_write_fn(write_ptr, (void*)file.get(), 1316 png_write_aapt_file, png_flush_aapt_file); 1317 1318 if (setjmp(png_jmpbuf(write_ptr))) 1319 { 1320 goto bail; 1321 } 1322 1323 write_png(printableName.string(), write_ptr, write_info, imageInfo, 1324 bundle->getGrayscaleTolerance()); 1325 1326 error = NO_ERROR; 1327 1328 if (bundle->getVerbose()) { 1329 fseek(fp, 0, SEEK_END); 1330 size_t oldSize = (size_t)ftell(fp); 1331 size_t newSize = file->getSize(); 1332 float factor = ((float)newSize)/oldSize; 1333 int percent = (int)(factor*100); 1334 printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); 1335 } 1336 1337bail: 1338 if (read_ptr) { 1339 png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); 1340 } 1341 if (fp) { 1342 fclose(fp); 1343 } 1344 if (write_ptr) { 1345 png_destroy_write_struct(&write_ptr, &write_info); 1346 } 1347 1348 if (error != NO_ERROR) { 1349 fprintf(stderr, "ERROR: Failure processing PNG image %s\n", 1350 file->getPrintableSource().string()); 1351 } 1352 return error; 1353} 1354 1355status_t preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) 1356{ 1357 png_structp read_ptr = NULL; 1358 png_infop read_info = NULL; 1359 1360 FILE* fp; 1361 1362 image_info imageInfo; 1363 1364 png_structp write_ptr = NULL; 1365 png_infop write_info = NULL; 1366 1367 status_t error = UNKNOWN_ERROR; 1368 1369 if (bundle->getVerbose()) { 1370 printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); 1371 } 1372 1373 // Get a file handler to read from 1374 fp = fopen(source.string(),"rb"); 1375 if (fp == NULL) { 1376 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); 1377 return error; 1378 } 1379 1380 // Call libpng to get a struct to read image data into 1381 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1382 if (!read_ptr) { 1383 fclose(fp); 1384 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1385 return error; 1386 } 1387 1388 // Call libpng to get a struct to read image info into 1389 read_info = png_create_info_struct(read_ptr); 1390 if (!read_info) { 1391 fclose(fp); 1392 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1393 return error; 1394 } 1395 1396 // Set a jump point for libpng to long jump back to on error 1397 if (setjmp(png_jmpbuf(read_ptr))) { 1398 fclose(fp); 1399 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1400 return error; 1401 } 1402 1403 // Set up libpng to read from our file. 1404 png_init_io(read_ptr,fp); 1405 1406 // Actually read data from the file 1407 read_png(source.string(), read_ptr, read_info, &imageInfo); 1408 1409 // We're done reading so we can clean up 1410 // Find old file size before releasing handle 1411 fseek(fp, 0, SEEK_END); 1412 size_t oldSize = (size_t)ftell(fp); 1413 fclose(fp); 1414 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1415 1416 // Check to see if we're dealing with a 9-patch 1417 // If we are, process appropriately 1418 if (source.getBasePath().getPathExtension() == ".9") { 1419 if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { 1420 return error; 1421 } 1422 } 1423 1424 // Call libpng to create a structure to hold the processed image data 1425 // that can be written to disk 1426 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1427 if (!write_ptr) { 1428 png_destroy_write_struct(&write_ptr, &write_info); 1429 return error; 1430 } 1431 1432 // Call libpng to create a structure to hold processed image info that can 1433 // be written to disk 1434 write_info = png_create_info_struct(write_ptr); 1435 if (!write_info) { 1436 png_destroy_write_struct(&write_ptr, &write_info); 1437 return error; 1438 } 1439 1440 // Open up our destination file for writing 1441 fp = fopen(dest.string(), "wb"); 1442 if (!fp) { 1443 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); 1444 png_destroy_write_struct(&write_ptr, &write_info); 1445 return error; 1446 } 1447 1448 // Set up libpng to write to our file 1449 png_init_io(write_ptr, fp); 1450 1451 // Set up a jump for libpng to long jump back on on errors 1452 if (setjmp(png_jmpbuf(write_ptr))) { 1453 fclose(fp); 1454 png_destroy_write_struct(&write_ptr, &write_info); 1455 return error; 1456 } 1457 1458 // Actually write out to the new png 1459 write_png(dest.string(), write_ptr, write_info, imageInfo, 1460 bundle->getGrayscaleTolerance()); 1461 1462 if (bundle->getVerbose()) { 1463 // Find the size of our new file 1464 FILE* reader = fopen(dest.string(), "rb"); 1465 fseek(reader, 0, SEEK_END); 1466 size_t newSize = (size_t)ftell(reader); 1467 fclose(reader); 1468 1469 float factor = ((float)newSize)/oldSize; 1470 int percent = (int)(factor*100); 1471 printf(" (processed image to cache entry %s: %d%% size of source)\n", 1472 dest.string(), percent); 1473 } 1474 1475 //Clean up 1476 fclose(fp); 1477 png_destroy_write_struct(&write_ptr, &write_info); 1478 1479 return NO_ERROR; 1480} 1481 1482status_t postProcessImage(const sp<AaptAssets>& assets, 1483 ResourceTable* table, const sp<AaptFile>& file) 1484{ 1485 String8 ext(file->getPath().getPathExtension()); 1486 1487 // At this point, now that we have all the resource data, all we need to 1488 // do is compile XML files. 1489 if (strcmp(ext.string(), ".xml") == 0) { 1490 return compileXmlFile(assets, file, table); 1491 } 1492 1493 return NO_ERROR; 1494} 1495