Images.cpp revision 47cd8e921db73e894f94ec4729ade90da50996f5
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 bool outlineFilled; 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 unsigned char 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 unsigned char 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 bool is_opaque_over_row(png_byte* row, int startX, int endX) 428{ 429 for (int x = startX; x < endX; x++) { 430 png_byte* color = row + x * 4; 431 if (color[3] != 0xff) return false; 432 } 433 return true; 434} 435 436static bool is_opaque_over_col(png_byte** rows, int offsetX, int startY, int endY) 437{ 438 for (int y = startY; y < endY; y++) { 439 png_byte* color = rows[y] + offsetX * 4; 440 if (color[3] != 0xff) return false; 441 } 442 return true; 443} 444 445static void get_outline(image_info* image) 446{ 447 int midX = image->width / 2; 448 int midY = image->height / 2; 449 int endX = image->width - 2; 450 int endY = image->height - 2; 451 452 // find left and right extent of nine patch content on center row 453 if (image->width > 4) { 454 find_max_opacity(image->rows, 1, midY, midX, -1, 1, 0, &image->outlineInsetsLeft); 455 find_max_opacity(image->rows, endX, midY, midX, -1, -1, 0, &image->outlineInsetsRight); 456 } else { 457 image->outlineInsetsLeft = 0; 458 image->outlineInsetsRight = 0; 459 } 460 461 // find top and bottom extent of nine patch content on center column 462 if (image->height > 4) { 463 find_max_opacity(image->rows, midX, 1, -1, midY, 0, 1, &image->outlineInsetsTop); 464 find_max_opacity(image->rows, midX, endY, -1, midY, 0, -1, &image->outlineInsetsBottom); 465 } else { 466 image->outlineInsetsTop = 0; 467 image->outlineInsetsBottom = 0; 468 } 469 470 int innerStartX = 1 + image->outlineInsetsLeft; 471 int innerStartY = 1 + image->outlineInsetsTop; 472 int innerEndX = endX - image->outlineInsetsRight; 473 int innerEndY = endY - image->outlineInsetsBottom; 474 int innerMidX = (innerEndX + innerStartX) / 2; 475 int innerMidY = (innerEndY + innerStartY) / 2; 476 477 // assuming the image is a round rect, compute the radius by marching 478 // diagonally from the top left corner towards the center 479 image->outlineFilled = is_opaque_over_row(image->rows[innerMidY], innerStartX, innerEndX) 480 && is_opaque_over_col(image->rows, innerMidX, innerStartY, innerStartY); 481 482 int diagonalInset = 0; 483 find_max_opacity(image->rows, innerStartX, innerStartY, innerMidX, innerMidY, 1, 1, 484 &diagonalInset); 485 486 // Determine source radius based upon inset 487 // radius = 1 / (sqrt(2) - 1) * inset 488 image->outlineRadius = 2.4142f * diagonalInset; 489 490 NOISY(printf("outline insets %d %d %d %d, rad %f, filled %d\n", 491 image->outlineFilled, 492 image->outlineInsetsLeft, 493 image->outlineInsetsTop, 494 image->outlineInsetsRight, 495 image->outlineInsetsBottom, 496 image->outlineRadius, 497 image->outlineFilled)); 498} 499 500 501static uint32_t get_color( 502 png_bytepp rows, int left, int top, int right, int bottom) 503{ 504 png_bytep color = rows[top] + left*4; 505 506 if (left > right || top > bottom) { 507 return Res_png_9patch::TRANSPARENT_COLOR; 508 } 509 510 while (top <= bottom) { 511 for (int i = left; i <= right; i++) { 512 png_bytep p = rows[top]+i*4; 513 if (color[3] == 0) { 514 if (p[3] != 0) { 515 return Res_png_9patch::NO_COLOR; 516 } 517 } else if (p[0] != color[0] || p[1] != color[1] 518 || p[2] != color[2] || p[3] != color[3]) { 519 return Res_png_9patch::NO_COLOR; 520 } 521 } 522 top++; 523 } 524 525 if (color[3] == 0) { 526 return Res_png_9patch::TRANSPARENT_COLOR; 527 } 528 return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; 529} 530 531static void select_patch( 532 int which, int front, int back, int size, int* start, int* end) 533{ 534 switch (which) { 535 case 0: 536 *start = 0; 537 *end = front-1; 538 break; 539 case 1: 540 *start = front; 541 *end = back-1; 542 break; 543 case 2: 544 *start = back; 545 *end = size-1; 546 break; 547 } 548} 549 550static uint32_t get_color(image_info* image, int hpatch, int vpatch) 551{ 552 int left, right, top, bottom; 553 select_patch( 554 hpatch, image->xDivs[0], image->xDivs[1], 555 image->width, &left, &right); 556 select_patch( 557 vpatch, image->yDivs[0], image->yDivs[1], 558 image->height, &top, &bottom); 559 //printf("Selecting h=%d v=%d: (%d,%d)-(%d,%d)\n", 560 // hpatch, vpatch, left, top, right, bottom); 561 const uint32_t c = get_color(image->rows, left, top, right, bottom); 562 NOISY(printf("Color in (%d,%d)-(%d,%d): #%08x\n", left, top, right, bottom, c)); 563 return c; 564} 565 566static status_t do_9patch(const char* imageName, image_info* image) 567{ 568 image->is9Patch = true; 569 570 int W = image->width; 571 int H = image->height; 572 int i, j; 573 574 int maxSizeXDivs = W * sizeof(int32_t); 575 int maxSizeYDivs = H * sizeof(int32_t); 576 int32_t* xDivs = image->xDivs = (int32_t*) malloc(maxSizeXDivs); 577 int32_t* yDivs = image->yDivs = (int32_t*) malloc(maxSizeYDivs); 578 uint8_t numXDivs = 0; 579 uint8_t numYDivs = 0; 580 581 int8_t numColors; 582 int numRows; 583 int numCols; 584 int top; 585 int left; 586 int right; 587 int bottom; 588 memset(xDivs, -1, maxSizeXDivs); 589 memset(yDivs, -1, maxSizeYDivs); 590 image->info9Patch.paddingLeft = image->info9Patch.paddingRight = 591 image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; 592 593 image->layoutBoundsLeft = image->layoutBoundsRight = 594 image->layoutBoundsTop = image->layoutBoundsBottom = 0; 595 596 png_bytep p = image->rows[0]; 597 bool transparent = p[3] == 0; 598 bool hasColor = false; 599 600 const char* errorMsg = NULL; 601 int errorPixel = -1; 602 const char* errorEdge = NULL; 603 604 int colorIndex = 0; 605 606 // Validate size... 607 if (W < 3 || H < 3) { 608 errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; 609 goto getout; 610 } 611 612 // Validate frame... 613 if (!transparent && 614 (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { 615 errorMsg = "Must have one-pixel frame that is either transparent or white"; 616 goto getout; 617 } 618 619 // Find left and right of sizing areas... 620 if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], 621 &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { 622 errorPixel = xDivs[0]; 623 errorEdge = "top"; 624 goto getout; 625 } 626 627 // Find top and bottom of sizing areas... 628 if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], 629 &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { 630 errorPixel = yDivs[0]; 631 errorEdge = "left"; 632 goto getout; 633 } 634 635 // Copy patch size data into image... 636 image->info9Patch.numXDivs = numXDivs; 637 image->info9Patch.numYDivs = numYDivs; 638 639 // Find left and right of padding area... 640 if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, 641 &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { 642 errorPixel = image->info9Patch.paddingLeft; 643 errorEdge = "bottom"; 644 goto getout; 645 } 646 647 // Find top and bottom of padding area... 648 if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, 649 &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { 650 errorPixel = image->info9Patch.paddingTop; 651 errorEdge = "right"; 652 goto getout; 653 } 654 655 // Find left and right of layout padding... 656 get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, 657 &image->layoutBoundsLeft, 658 &image->layoutBoundsRight, &errorMsg); 659 660 get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, 661 &image->layoutBoundsTop, 662 &image->layoutBoundsBottom, &errorMsg); 663 664 image->haveLayoutBounds = image->layoutBoundsLeft != 0 665 || image->layoutBoundsRight != 0 666 || image->layoutBoundsTop != 0 667 || image->layoutBoundsBottom != 0; 668 669 if (image->haveLayoutBounds) { 670 NOISY(printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, 671 image->layoutBoundsRight, image->layoutBoundsBottom)); 672 } 673 674 // use opacity of pixels to estimate the round rect outline 675 get_outline(image); 676 677 // If padding is not yet specified, take values from size. 678 if (image->info9Patch.paddingLeft < 0) { 679 image->info9Patch.paddingLeft = xDivs[0]; 680 image->info9Patch.paddingRight = W - 2 - xDivs[1]; 681 } else { 682 // Adjust value to be correct! 683 image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; 684 } 685 if (image->info9Patch.paddingTop < 0) { 686 image->info9Patch.paddingTop = yDivs[0]; 687 image->info9Patch.paddingBottom = H - 2 - yDivs[1]; 688 } else { 689 // Adjust value to be correct! 690 image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; 691 } 692 693 NOISY(printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, 694 image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], 695 image->info9Patch.yDivs[0], image->info9Patch.yDivs[1])); 696 NOISY(printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, 697 image->info9Patch.paddingLeft, image->info9Patch.paddingRight, 698 image->info9Patch.paddingTop, image->info9Patch.paddingBottom)); 699 700 // Remove frame from image. 701 image->rows = (png_bytepp)malloc((H-2) * sizeof(png_bytep)); 702 for (i=0; i<(H-2); i++) { 703 image->rows[i] = image->allocRows[i+1]; 704 memmove(image->rows[i], image->rows[i]+4, (W-2)*4); 705 } 706 image->width -= 2; 707 W = image->width; 708 image->height -= 2; 709 H = image->height; 710 711 // Figure out the number of rows and columns in the N-patch 712 numCols = numXDivs + 1; 713 if (xDivs[0] == 0) { // Column 1 is strechable 714 numCols--; 715 } 716 if (xDivs[numXDivs - 1] == W) { 717 numCols--; 718 } 719 numRows = numYDivs + 1; 720 if (yDivs[0] == 0) { // Row 1 is strechable 721 numRows--; 722 } 723 if (yDivs[numYDivs - 1] == H) { 724 numRows--; 725 } 726 727 // Make sure the amount of rows and columns will fit in the number of 728 // colors we can use in the 9-patch format. 729 if (numRows * numCols > 0x7F) { 730 errorMsg = "Too many rows and columns in 9-patch perimeter"; 731 goto getout; 732 } 733 734 numColors = numRows * numCols; 735 image->info9Patch.numColors = numColors; 736 image->colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); 737 738 // Fill in color information for each patch. 739 740 uint32_t c; 741 top = 0; 742 743 // The first row always starts with the top being at y=0 and the bottom 744 // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case 745 // the first row is stretchable along the Y axis, otherwise it is fixed. 746 // The last row always ends with the bottom being bitmap.height and the top 747 // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or 748 // yDivs[numYDivs-1]. In the former case the last row is stretchable along 749 // the Y axis, otherwise it is fixed. 750 // 751 // The first and last columns are similarly treated with respect to the X 752 // axis. 753 // 754 // The above is to help explain some of the special casing that goes on the 755 // code below. 756 757 // The initial yDiv and whether the first row is considered stretchable or 758 // not depends on whether yDiv[0] was zero or not. 759 for (j = (yDivs[0] == 0 ? 1 : 0); 760 j <= numYDivs && top < H; 761 j++) { 762 if (j == numYDivs) { 763 bottom = H; 764 } else { 765 bottom = yDivs[j]; 766 } 767 left = 0; 768 // The initial xDiv and whether the first column is considered 769 // stretchable or not depends on whether xDiv[0] was zero or not. 770 for (i = xDivs[0] == 0 ? 1 : 0; 771 i <= numXDivs && left < W; 772 i++) { 773 if (i == numXDivs) { 774 right = W; 775 } else { 776 right = xDivs[i]; 777 } 778 c = get_color(image->rows, left, top, right - 1, bottom - 1); 779 image->colors[colorIndex++] = c; 780 NOISY(if (c != Res_png_9patch::NO_COLOR) hasColor = true); 781 left = right; 782 } 783 top = bottom; 784 } 785 786 assert(colorIndex == numColors); 787 788 for (i=0; i<numColors; i++) { 789 if (hasColor) { 790 if (i == 0) printf("Colors in %s:\n ", imageName); 791 printf(" #%08x", image->colors[i]); 792 if (i == numColors - 1) printf("\n"); 793 } 794 } 795getout: 796 if (errorMsg) { 797 fprintf(stderr, 798 "ERROR: 9-patch image %s malformed.\n" 799 " %s.\n", imageName, errorMsg); 800 if (errorEdge != NULL) { 801 if (errorPixel >= 0) { 802 fprintf(stderr, 803 " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); 804 } else { 805 fprintf(stderr, 806 " Found along %s edge.\n", errorEdge); 807 } 808 } 809 return UNKNOWN_ERROR; 810 } 811 return NO_ERROR; 812} 813 814static void checkNinePatchSerialization(Res_png_9patch* inPatch, void* data) 815{ 816 size_t patchSize = inPatch->serializedSize(); 817 void* newData = malloc(patchSize); 818 memcpy(newData, data, patchSize); 819 Res_png_9patch* outPatch = inPatch->deserialize(newData); 820 // deserialization is done in place, so outPatch == newData 821 assert(outPatch == newData); 822 assert(outPatch->numXDivs == inPatch->numXDivs); 823 assert(outPatch->numYDivs == inPatch->numYDivs); 824 assert(outPatch->paddingLeft == inPatch->paddingLeft); 825 assert(outPatch->paddingRight == inPatch->paddingRight); 826 assert(outPatch->paddingTop == inPatch->paddingTop); 827 assert(outPatch->paddingBottom == inPatch->paddingBottom); 828 for (int i = 0; i < outPatch->numXDivs; i++) { 829 assert(outPatch->xDivs[i] == inPatch->xDivs[i]); 830 } 831 for (int i = 0; i < outPatch->numYDivs; i++) { 832 assert(outPatch->yDivs[i] == inPatch->yDivs[i]); 833 } 834 for (int i = 0; i < outPatch->numColors; i++) { 835 assert(outPatch->colors[i] == inPatch->colors[i]); 836 } 837 free(newData); 838} 839 840static void dump_image(int w, int h, png_bytepp rows, int color_type) 841{ 842 int i, j, rr, gg, bb, aa; 843 844 int bpp; 845 if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { 846 bpp = 1; 847 } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { 848 bpp = 2; 849 } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 850 // We use a padding byte even when there is no alpha 851 bpp = 4; 852 } else { 853 printf("Unknown color type %d.\n", color_type); 854 } 855 856 for (j = 0; j < h; j++) { 857 png_bytep row = rows[j]; 858 for (i = 0; i < w; i++) { 859 rr = row[0]; 860 gg = row[1]; 861 bb = row[2]; 862 aa = row[3]; 863 row += bpp; 864 865 if (i == 0) { 866 printf("Row %d:", j); 867 } 868 switch (bpp) { 869 case 1: 870 printf(" (%d)", rr); 871 break; 872 case 2: 873 printf(" (%d %d", rr, gg); 874 break; 875 case 3: 876 printf(" (%d %d %d)", rr, gg, bb); 877 break; 878 case 4: 879 printf(" (%d %d %d %d)", rr, gg, bb, aa); 880 break; 881 } 882 if (i == (w - 1)) { 883 NOISY(printf("\n")); 884 } 885 } 886 } 887} 888 889#define MAX(a,b) ((a)>(b)?(a):(b)) 890#define ABS(a) ((a)<0?-(a):(a)) 891 892static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, 893 png_colorp rgbPalette, png_bytep alphaPalette, 894 int *paletteEntries, bool *hasTransparency, int *colorType, 895 png_bytepp outRows) 896{ 897 int w = imageInfo.width; 898 int h = imageInfo.height; 899 int i, j, rr, gg, bb, aa, idx; 900 uint32_t colors[256], col; 901 int num_colors = 0; 902 int maxGrayDeviation = 0; 903 904 bool isOpaque = true; 905 bool isPalette = true; 906 bool isGrayscale = true; 907 908 // Scan the entire image and determine if: 909 // 1. Every pixel has R == G == B (grayscale) 910 // 2. Every pixel has A == 255 (opaque) 911 // 3. There are no more than 256 distinct RGBA colors 912 913 // NOISY(printf("Initial image data:\n")); 914 // dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); 915 916 for (j = 0; j < h; j++) { 917 png_bytep row = imageInfo.rows[j]; 918 png_bytep out = outRows[j]; 919 for (i = 0; i < w; i++) { 920 rr = *row++; 921 gg = *row++; 922 bb = *row++; 923 aa = *row++; 924 925 int odev = maxGrayDeviation; 926 maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); 927 maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); 928 maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); 929 if (maxGrayDeviation > odev) { 930 NOISY(printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", 931 maxGrayDeviation, i, j, rr, gg, bb, aa)); 932 } 933 934 // Check if image is really grayscale 935 if (isGrayscale) { 936 if (rr != gg || rr != bb) { 937 NOISY(printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", 938 i, j, rr, gg, bb, aa)); 939 isGrayscale = false; 940 } 941 } 942 943 // Check if image is really opaque 944 if (isOpaque) { 945 if (aa != 0xff) { 946 NOISY(printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", 947 i, j, rr, gg, bb, aa)); 948 isOpaque = false; 949 } 950 } 951 952 // Check if image is really <= 256 colors 953 if (isPalette) { 954 col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); 955 bool match = false; 956 for (idx = 0; idx < num_colors; idx++) { 957 if (colors[idx] == col) { 958 match = true; 959 break; 960 } 961 } 962 963 // Write the palette index for the pixel to outRows optimistically 964 // We might overwrite it later if we decide to encode as gray or 965 // gray + alpha 966 *out++ = idx; 967 if (!match) { 968 if (num_colors == 256) { 969 NOISY(printf("Found 257th color at %d, %d\n", i, j)); 970 isPalette = false; 971 } else { 972 colors[num_colors++] = col; 973 } 974 } 975 } 976 } 977 } 978 979 *paletteEntries = 0; 980 *hasTransparency = !isOpaque; 981 int bpp = isOpaque ? 3 : 4; 982 int paletteSize = w * h + bpp * num_colors; 983 984 NOISY(printf("isGrayscale = %s\n", isGrayscale ? "true" : "false")); 985 NOISY(printf("isOpaque = %s\n", isOpaque ? "true" : "false")); 986 NOISY(printf("isPalette = %s\n", isPalette ? "true" : "false")); 987 NOISY(printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", 988 paletteSize, 2 * w * h, bpp * w * h)); 989 NOISY(printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance)); 990 991 // Choose the best color type for the image. 992 // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel 993 // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations 994 // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA 995 // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently 996 // small, otherwise use COLOR_TYPE_RGB{_ALPHA} 997 if (isGrayscale) { 998 if (isOpaque) { 999 *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel 1000 } else { 1001 // Use a simple heuristic to determine whether using a palette will 1002 // save space versus using gray + alpha for each pixel. 1003 // This doesn't take into account chunk overhead, filtering, LZ 1004 // compression, etc. 1005 if (isPalette && (paletteSize < 2 * w * h)) { 1006 *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color 1007 } else { 1008 *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel 1009 } 1010 } 1011 } else if (isPalette && (paletteSize < bpp * w * h)) { 1012 *colorType = PNG_COLOR_TYPE_PALETTE; 1013 } else { 1014 if (maxGrayDeviation <= grayscaleTolerance) { 1015 printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); 1016 *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; 1017 } else { 1018 *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; 1019 } 1020 } 1021 1022 // Perform postprocessing of the image or palette data based on the final 1023 // color type chosen 1024 1025 if (*colorType == PNG_COLOR_TYPE_PALETTE) { 1026 // Create separate RGB and Alpha palettes and set the number of colors 1027 *paletteEntries = num_colors; 1028 1029 // Create the RGB and alpha palettes 1030 for (int idx = 0; idx < num_colors; idx++) { 1031 col = colors[idx]; 1032 rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); 1033 rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); 1034 rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); 1035 alphaPalette[idx] = (png_byte) (col & 0xff); 1036 } 1037 } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { 1038 // If the image is gray or gray + alpha, compact the pixels into outRows 1039 for (j = 0; j < h; j++) { 1040 png_bytep row = imageInfo.rows[j]; 1041 png_bytep out = outRows[j]; 1042 for (i = 0; i < w; i++) { 1043 rr = *row++; 1044 gg = *row++; 1045 bb = *row++; 1046 aa = *row++; 1047 1048 if (isGrayscale) { 1049 *out++ = rr; 1050 } else { 1051 *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); 1052 } 1053 if (!isOpaque) { 1054 *out++ = aa; 1055 } 1056 } 1057 } 1058 } 1059} 1060 1061 1062static void write_png(const char* imageName, 1063 png_structp write_ptr, png_infop write_info, 1064 image_info& imageInfo, int grayscaleTolerance) 1065{ 1066 bool optimize = true; 1067 png_uint_32 width, height; 1068 int color_type; 1069 int bit_depth, interlace_type, compression_type; 1070 int i; 1071 1072 png_unknown_chunk unknowns[3]; 1073 unknowns[0].data = NULL; 1074 unknowns[1].data = NULL; 1075 unknowns[2].data = NULL; 1076 1077 png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * sizeof(png_bytep)); 1078 if (outRows == (png_bytepp) 0) { 1079 printf("Can't allocate output buffer!\n"); 1080 exit(1); 1081 } 1082 for (i = 0; i < (int) imageInfo.height; i++) { 1083 outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); 1084 if (outRows[i] == (png_bytep) 0) { 1085 printf("Can't allocate output buffer!\n"); 1086 exit(1); 1087 } 1088 } 1089 1090 png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); 1091 1092 NOISY(printf("Writing image %s: w = %d, h = %d\n", imageName, 1093 (int) imageInfo.width, (int) imageInfo.height)); 1094 1095 png_color rgbPalette[256]; 1096 png_byte alphaPalette[256]; 1097 bool hasTransparency; 1098 int paletteEntries; 1099 1100 analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, 1101 &paletteEntries, &hasTransparency, &color_type, outRows); 1102 1103 // If the image is a 9-patch, we need to preserve it as a ARGB file to make 1104 // sure the pixels will not be pre-dithered/clamped until we decide they are 1105 if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || 1106 color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { 1107 color_type = PNG_COLOR_TYPE_RGB_ALPHA; 1108 } 1109 1110 switch (color_type) { 1111 case PNG_COLOR_TYPE_PALETTE: 1112 NOISY(printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", 1113 imageName, paletteEntries, 1114 hasTransparency ? " (with alpha)" : "")); 1115 break; 1116 case PNG_COLOR_TYPE_GRAY: 1117 NOISY(printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName)); 1118 break; 1119 case PNG_COLOR_TYPE_GRAY_ALPHA: 1120 NOISY(printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName)); 1121 break; 1122 case PNG_COLOR_TYPE_RGB: 1123 NOISY(printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName)); 1124 break; 1125 case PNG_COLOR_TYPE_RGB_ALPHA: 1126 NOISY(printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName)); 1127 break; 1128 } 1129 1130 png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, 1131 8, color_type, PNG_INTERLACE_NONE, 1132 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); 1133 1134 if (color_type == PNG_COLOR_TYPE_PALETTE) { 1135 png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); 1136 if (hasTransparency) { 1137 png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); 1138 } 1139 png_set_filter(write_ptr, 0, PNG_NO_FILTERS); 1140 } else { 1141 png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); 1142 } 1143 1144 if (imageInfo.is9Patch) { 1145 int chunk_count = 2 + (imageInfo.haveLayoutBounds ? 1 : 0); 1146 int p_index = imageInfo.haveLayoutBounds ? 2 : 1; 1147 int b_index = 1; 1148 int o_index = 0; 1149 1150 // Chunks ordered thusly because older platforms depend on the base 9 patch data being last 1151 png_byte *chunk_names = imageInfo.haveLayoutBounds 1152 ? (png_byte*)"npOl\0npLb\0npTc\0" 1153 : (png_byte*)"npOl\0npTc"; 1154 1155 // base 9 patch data 1156 NOISY(printf("Adding 9-patch info...\n")); 1157 strcpy((char*)unknowns[p_index].name, "npTc"); 1158 unknowns[p_index].data = (png_byte*)imageInfo.serialize9patch(); 1159 unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); 1160 // TODO: remove the check below when everything works 1161 checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); 1162 1163 // automatically generated 9 patch outline data 1164 int chunk_size = sizeof(png_uint_32) * 6; 1165 strcpy((char*)unknowns[o_index].name, "npOl"); 1166 unknowns[o_index].data = (png_byte*) calloc(chunk_size, 1); 1167 png_byte outputData[chunk_size]; 1168 memcpy(&outputData, &imageInfo.outlineInsetsLeft, 4 * sizeof(png_uint_32)); 1169 ((float*) outputData)[4] = imageInfo.outlineRadius; 1170 ((png_uint_32*) outputData)[5] = imageInfo.outlineFilled ? 1 : 0; 1171 memcpy(unknowns[o_index].data, &outputData, chunk_size); 1172 unknowns[o_index].size = chunk_size; 1173 1174 // optional optical inset / layout bounds data 1175 if (imageInfo.haveLayoutBounds) { 1176 int chunk_size = sizeof(png_uint_32) * 4; 1177 strcpy((char*)unknowns[b_index].name, "npLb"); 1178 unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); 1179 memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); 1180 unknowns[b_index].size = chunk_size; 1181 } 1182 1183 for (int i = 0; i < chunk_count; i++) { 1184 unknowns[i].location = PNG_HAVE_PLTE; 1185 } 1186 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1187 chunk_names, chunk_count); 1188 png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); 1189#if PNG_LIBPNG_VER < 10600 1190 /* Deal with unknown chunk location bug in 1.5.x and earlier */ 1191 png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); 1192 if (imageInfo.haveLayoutBounds) { 1193 png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); 1194 } 1195#endif 1196 } 1197 1198 1199 png_write_info(write_ptr, write_info); 1200 1201 png_bytepp rows; 1202 if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 1203 if (color_type == PNG_COLOR_TYPE_RGB) { 1204 png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); 1205 } 1206 rows = imageInfo.rows; 1207 } else { 1208 rows = outRows; 1209 } 1210 png_write_image(write_ptr, rows); 1211 1212// NOISY(printf("Final image data:\n")); 1213// dump_image(imageInfo.width, imageInfo.height, rows, color_type); 1214 1215 png_write_end(write_ptr, write_info); 1216 1217 for (i = 0; i < (int) imageInfo.height; i++) { 1218 free(outRows[i]); 1219 } 1220 free(outRows); 1221 free(unknowns[0].data); 1222 free(unknowns[1].data); 1223 free(unknowns[2].data); 1224 1225 png_get_IHDR(write_ptr, write_info, &width, &height, 1226 &bit_depth, &color_type, &interlace_type, 1227 &compression_type, NULL); 1228 1229 NOISY(printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 1230 (int)width, (int)height, bit_depth, color_type, interlace_type, 1231 compression_type)); 1232} 1233 1234status_t preProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1235 const sp<AaptFile>& file, String8* outNewLeafName) 1236{ 1237 String8 ext(file->getPath().getPathExtension()); 1238 1239 // We currently only process PNG images. 1240 if (strcmp(ext.string(), ".png") != 0) { 1241 return NO_ERROR; 1242 } 1243 1244 // Example of renaming a file: 1245 //*outNewLeafName = file->getPath().getBasePath().getFileName(); 1246 //outNewLeafName->append(".nupng"); 1247 1248 String8 printableName(file->getPrintableSource()); 1249 1250 if (bundle->getVerbose()) { 1251 printf("Processing image: %s\n", printableName.string()); 1252 } 1253 1254 png_structp read_ptr = NULL; 1255 png_infop read_info = NULL; 1256 FILE* fp; 1257 1258 image_info imageInfo; 1259 1260 png_structp write_ptr = NULL; 1261 png_infop write_info = NULL; 1262 1263 status_t error = UNKNOWN_ERROR; 1264 1265 const size_t nameLen = file->getPath().length(); 1266 1267 fp = fopen(file->getSourceFile().string(), "rb"); 1268 if (fp == NULL) { 1269 fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); 1270 goto bail; 1271 } 1272 1273 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1274 (png_error_ptr)NULL); 1275 if (!read_ptr) { 1276 goto bail; 1277 } 1278 1279 read_info = png_create_info_struct(read_ptr); 1280 if (!read_info) { 1281 goto bail; 1282 } 1283 1284 if (setjmp(png_jmpbuf(read_ptr))) { 1285 goto bail; 1286 } 1287 1288 png_init_io(read_ptr, fp); 1289 1290 read_png(printableName.string(), read_ptr, read_info, &imageInfo); 1291 1292 if (nameLen > 6) { 1293 const char* name = file->getPath().string(); 1294 if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { 1295 if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { 1296 goto bail; 1297 } 1298 } 1299 } 1300 1301 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1302 (png_error_ptr)NULL); 1303 if (!write_ptr) 1304 { 1305 goto bail; 1306 } 1307 1308 write_info = png_create_info_struct(write_ptr); 1309 if (!write_info) 1310 { 1311 goto bail; 1312 } 1313 1314 png_set_write_fn(write_ptr, (void*)file.get(), 1315 png_write_aapt_file, png_flush_aapt_file); 1316 1317 if (setjmp(png_jmpbuf(write_ptr))) 1318 { 1319 goto bail; 1320 } 1321 1322 write_png(printableName.string(), write_ptr, write_info, imageInfo, 1323 bundle->getGrayscaleTolerance()); 1324 1325 error = NO_ERROR; 1326 1327 if (bundle->getVerbose()) { 1328 fseek(fp, 0, SEEK_END); 1329 size_t oldSize = (size_t)ftell(fp); 1330 size_t newSize = file->getSize(); 1331 float factor = ((float)newSize)/oldSize; 1332 int percent = (int)(factor*100); 1333 printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); 1334 } 1335 1336bail: 1337 if (read_ptr) { 1338 png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); 1339 } 1340 if (fp) { 1341 fclose(fp); 1342 } 1343 if (write_ptr) { 1344 png_destroy_write_struct(&write_ptr, &write_info); 1345 } 1346 1347 if (error != NO_ERROR) { 1348 fprintf(stderr, "ERROR: Failure processing PNG image %s\n", 1349 file->getPrintableSource().string()); 1350 } 1351 return error; 1352} 1353 1354status_t preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) 1355{ 1356 png_structp read_ptr = NULL; 1357 png_infop read_info = NULL; 1358 1359 FILE* fp; 1360 1361 image_info imageInfo; 1362 1363 png_structp write_ptr = NULL; 1364 png_infop write_info = NULL; 1365 1366 status_t error = UNKNOWN_ERROR; 1367 1368 if (bundle->getVerbose()) { 1369 printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); 1370 } 1371 1372 // Get a file handler to read from 1373 fp = fopen(source.string(),"rb"); 1374 if (fp == NULL) { 1375 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); 1376 return error; 1377 } 1378 1379 // Call libpng to get a struct to read image data into 1380 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1381 if (!read_ptr) { 1382 fclose(fp); 1383 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1384 return error; 1385 } 1386 1387 // Call libpng to get a struct to read image info into 1388 read_info = png_create_info_struct(read_ptr); 1389 if (!read_info) { 1390 fclose(fp); 1391 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1392 return error; 1393 } 1394 1395 // Set a jump point for libpng to long jump back to on error 1396 if (setjmp(png_jmpbuf(read_ptr))) { 1397 fclose(fp); 1398 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1399 return error; 1400 } 1401 1402 // Set up libpng to read from our file. 1403 png_init_io(read_ptr,fp); 1404 1405 // Actually read data from the file 1406 read_png(source.string(), read_ptr, read_info, &imageInfo); 1407 1408 // We're done reading so we can clean up 1409 // Find old file size before releasing handle 1410 fseek(fp, 0, SEEK_END); 1411 size_t oldSize = (size_t)ftell(fp); 1412 fclose(fp); 1413 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1414 1415 // Check to see if we're dealing with a 9-patch 1416 // If we are, process appropriately 1417 if (source.getBasePath().getPathExtension() == ".9") { 1418 if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { 1419 return error; 1420 } 1421 } 1422 1423 // Call libpng to create a structure to hold the processed image data 1424 // that can be written to disk 1425 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1426 if (!write_ptr) { 1427 png_destroy_write_struct(&write_ptr, &write_info); 1428 return error; 1429 } 1430 1431 // Call libpng to create a structure to hold processed image info that can 1432 // be written to disk 1433 write_info = png_create_info_struct(write_ptr); 1434 if (!write_info) { 1435 png_destroy_write_struct(&write_ptr, &write_info); 1436 return error; 1437 } 1438 1439 // Open up our destination file for writing 1440 fp = fopen(dest.string(), "wb"); 1441 if (!fp) { 1442 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); 1443 png_destroy_write_struct(&write_ptr, &write_info); 1444 return error; 1445 } 1446 1447 // Set up libpng to write to our file 1448 png_init_io(write_ptr, fp); 1449 1450 // Set up a jump for libpng to long jump back on on errors 1451 if (setjmp(png_jmpbuf(write_ptr))) { 1452 fclose(fp); 1453 png_destroy_write_struct(&write_ptr, &write_info); 1454 return error; 1455 } 1456 1457 // Actually write out to the new png 1458 write_png(dest.string(), write_ptr, write_info, imageInfo, 1459 bundle->getGrayscaleTolerance()); 1460 1461 if (bundle->getVerbose()) { 1462 // Find the size of our new file 1463 FILE* reader = fopen(dest.string(), "rb"); 1464 fseek(reader, 0, SEEK_END); 1465 size_t newSize = (size_t)ftell(reader); 1466 fclose(reader); 1467 1468 float factor = ((float)newSize)/oldSize; 1469 int percent = (int)(factor*100); 1470 printf(" (processed image to cache entry %s: %d%% size of source)\n", 1471 dest.string(), percent); 1472 } 1473 1474 //Clean up 1475 fclose(fp); 1476 png_destroy_write_struct(&write_ptr, &write_info); 1477 1478 return NO_ERROR; 1479} 1480 1481status_t postProcessImage(const sp<AaptAssets>& assets, 1482 ResourceTable* table, const sp<AaptFile>& file) 1483{ 1484 String8 ext(file->getPath().getPathExtension()); 1485 1486 // At this point, now that we have all the resource data, all we need to 1487 // do is compile XML files. 1488 if (strcmp(ext.string(), ".xml") == 0) { 1489 return compileXmlFile(assets, file, table); 1490 } 1491 1492 return NO_ERROR; 1493} 1494