Images.cpp revision 8daabceb2efddebe2e7c0b2425ad9f8ef62c0a5c
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// Change this to true for noisy debug output. 18static const bool kIsDebug = false; 19 20static void 21png_write_aapt_file(png_structp png_ptr, png_bytep data, png_size_t length) 22{ 23 AaptFile* aaptfile = (AaptFile*) png_get_io_ptr(png_ptr); 24 status_t err = aaptfile->writeData(data, length); 25 if (err != NO_ERROR) { 26 png_error(png_ptr, "Write Error"); 27 } 28} 29 30 31static void 32png_flush_aapt_file(png_structp /* png_ptr */) 33{ 34} 35 36// This holds an image as 8bpp RGBA. 37struct image_info 38{ 39 image_info() : rows(NULL), is9Patch(false), 40 xDivs(NULL), yDivs(NULL), colors(NULL), allocRows(NULL) { } 41 42 ~image_info() { 43 if (rows && rows != allocRows) { 44 free(rows); 45 } 46 if (allocRows) { 47 for (int i=0; i<(int)allocHeight; i++) { 48 free(allocRows[i]); 49 } 50 free(allocRows); 51 } 52 free(xDivs); 53 free(yDivs); 54 free(colors); 55 } 56 57 void* serialize9patch() { 58 void* serialized = Res_png_9patch::serialize(info9Patch, xDivs, yDivs, colors); 59 reinterpret_cast<Res_png_9patch*>(serialized)->deviceToFile(); 60 return serialized; 61 } 62 63 png_uint_32 width; 64 png_uint_32 height; 65 png_bytepp rows; 66 67 // 9-patch info. 68 bool is9Patch; 69 Res_png_9patch info9Patch; 70 int32_t* xDivs; 71 int32_t* yDivs; 72 uint32_t* colors; 73 74 // Layout padding, if relevant 75 bool haveLayoutBounds; 76 int32_t layoutBoundsLeft; 77 int32_t layoutBoundsTop; 78 int32_t layoutBoundsRight; 79 int32_t layoutBoundsBottom; 80 81 // Round rect outline description 82 int32_t outlineInsetsLeft; 83 int32_t outlineInsetsTop; 84 int32_t outlineInsetsRight; 85 int32_t outlineInsetsBottom; 86 float outlineRadius; 87 uint8_t outlineAlpha; 88 89 png_uint_32 allocHeight; 90 png_bytepp allocRows; 91}; 92 93static void log_warning(png_structp png_ptr, png_const_charp warning_message) 94{ 95 const char* imageName = (const char*) png_get_error_ptr(png_ptr); 96 fprintf(stderr, "%s: libpng warning: %s\n", imageName, warning_message); 97} 98 99static void read_png(const char* imageName, 100 png_structp read_ptr, png_infop read_info, 101 image_info* outImageInfo) 102{ 103 int color_type; 104 int bit_depth, interlace_type, compression_type; 105 int i; 106 107 png_set_error_fn(read_ptr, const_cast<char*>(imageName), 108 NULL /* use default errorfn */, log_warning); 109 png_read_info(read_ptr, read_info); 110 111 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 112 &outImageInfo->height, &bit_depth, &color_type, 113 &interlace_type, &compression_type, NULL); 114 115 //printf("Image %s:\n", imageName); 116 //printf("color_type=%d, bit_depth=%d, interlace_type=%d, compression_type=%d\n", 117 // color_type, bit_depth, interlace_type, compression_type); 118 119 if (color_type == PNG_COLOR_TYPE_PALETTE) 120 png_set_palette_to_rgb(read_ptr); 121 122 if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) 123 png_set_expand_gray_1_2_4_to_8(read_ptr); 124 125 if (png_get_valid(read_ptr, read_info, PNG_INFO_tRNS)) { 126 //printf("Has PNG_INFO_tRNS!\n"); 127 png_set_tRNS_to_alpha(read_ptr); 128 } 129 130 if (bit_depth == 16) 131 png_set_strip_16(read_ptr); 132 133 if ((color_type&PNG_COLOR_MASK_ALPHA) == 0) 134 png_set_add_alpha(read_ptr, 0xFF, PNG_FILLER_AFTER); 135 136 if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) 137 png_set_gray_to_rgb(read_ptr); 138 139 png_set_interlace_handling(read_ptr); 140 141 png_read_update_info(read_ptr, read_info); 142 143 outImageInfo->rows = (png_bytepp)malloc( 144 outImageInfo->height * sizeof(png_bytep)); 145 outImageInfo->allocHeight = outImageInfo->height; 146 outImageInfo->allocRows = outImageInfo->rows; 147 148 png_set_rows(read_ptr, read_info, outImageInfo->rows); 149 150 for (i = 0; i < (int)outImageInfo->height; i++) 151 { 152 outImageInfo->rows[i] = (png_bytep) 153 malloc(png_get_rowbytes(read_ptr, read_info)); 154 } 155 156 png_read_image(read_ptr, outImageInfo->rows); 157 158 png_read_end(read_ptr, read_info); 159 160 if (kIsDebug) { 161 printf("Image %s: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 162 imageName, 163 (int)outImageInfo->width, (int)outImageInfo->height, 164 bit_depth, color_type, 165 interlace_type, compression_type); 166 } 167 168 png_get_IHDR(read_ptr, read_info, &outImageInfo->width, 169 &outImageInfo->height, &bit_depth, &color_type, 170 &interlace_type, &compression_type, NULL); 171} 172 173#define COLOR_TRANSPARENT 0 174#define COLOR_WHITE 0xFFFFFFFF 175#define COLOR_TICK 0xFF000000 176#define COLOR_LAYOUT_BOUNDS_TICK 0xFF0000FF 177 178enum { 179 TICK_TYPE_NONE, 180 TICK_TYPE_TICK, 181 TICK_TYPE_LAYOUT_BOUNDS, 182 TICK_TYPE_BOTH 183}; 184 185static int tick_type(png_bytep p, bool transparent, const char** outError) 186{ 187 png_uint_32 color = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); 188 189 if (transparent) { 190 if (p[3] == 0) { 191 return TICK_TYPE_NONE; 192 } 193 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 194 return TICK_TYPE_LAYOUT_BOUNDS; 195 } 196 if (color == COLOR_TICK) { 197 return TICK_TYPE_TICK; 198 } 199 200 // Error cases 201 if (p[3] != 0xff) { 202 *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)"; 203 return TICK_TYPE_NONE; 204 } 205 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 206 *outError = "Ticks in transparent frame must be black or red"; 207 } 208 return TICK_TYPE_TICK; 209 } 210 211 if (p[3] != 0xFF) { 212 *outError = "White frame must be a solid color (no alpha)"; 213 } 214 if (color == COLOR_WHITE) { 215 return TICK_TYPE_NONE; 216 } 217 if (color == COLOR_TICK) { 218 return TICK_TYPE_TICK; 219 } 220 if (color == COLOR_LAYOUT_BOUNDS_TICK) { 221 return TICK_TYPE_LAYOUT_BOUNDS; 222 } 223 224 if (p[0] != 0 || p[1] != 0 || p[2] != 0) { 225 *outError = "Ticks in white frame must be black or red"; 226 return TICK_TYPE_NONE; 227 } 228 return TICK_TYPE_TICK; 229} 230 231enum { 232 TICK_START, 233 TICK_INSIDE_1, 234 TICK_OUTSIDE_1 235}; 236 237static status_t get_horizontal_ticks( 238 png_bytep row, int width, bool transparent, bool required, 239 int32_t* outLeft, int32_t* outRight, const char** outError, 240 uint8_t* outDivs, bool multipleAllowed) 241{ 242 int i; 243 *outLeft = *outRight = -1; 244 int state = TICK_START; 245 bool found = false; 246 247 for (i=1; i<width-1; i++) { 248 if (TICK_TYPE_TICK == tick_type(row+i*4, transparent, outError)) { 249 if (state == TICK_START || 250 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 251 *outLeft = i-1; 252 *outRight = width-2; 253 found = true; 254 if (outDivs != NULL) { 255 *outDivs += 2; 256 } 257 state = TICK_INSIDE_1; 258 } else if (state == TICK_OUTSIDE_1) { 259 *outError = "Can't have more than one marked region along edge"; 260 *outLeft = i; 261 return UNKNOWN_ERROR; 262 } 263 } else if (*outError == NULL) { 264 if (state == TICK_INSIDE_1) { 265 // We're done with this div. Move on to the next. 266 *outRight = i-1; 267 outRight += 2; 268 outLeft += 2; 269 state = TICK_OUTSIDE_1; 270 } 271 } else { 272 *outLeft = i; 273 return UNKNOWN_ERROR; 274 } 275 } 276 277 if (required && !found) { 278 *outError = "No marked region found along edge"; 279 *outLeft = -1; 280 return UNKNOWN_ERROR; 281 } 282 283 return NO_ERROR; 284} 285 286static status_t get_vertical_ticks( 287 png_bytepp rows, int offset, int height, bool transparent, bool required, 288 int32_t* outTop, int32_t* outBottom, const char** outError, 289 uint8_t* outDivs, bool multipleAllowed) 290{ 291 int i; 292 *outTop = *outBottom = -1; 293 int state = TICK_START; 294 bool found = false; 295 296 for (i=1; i<height-1; i++) { 297 if (TICK_TYPE_TICK == tick_type(rows[i]+offset, transparent, outError)) { 298 if (state == TICK_START || 299 (state == TICK_OUTSIDE_1 && multipleAllowed)) { 300 *outTop = i-1; 301 *outBottom = height-2; 302 found = true; 303 if (outDivs != NULL) { 304 *outDivs += 2; 305 } 306 state = TICK_INSIDE_1; 307 } else if (state == TICK_OUTSIDE_1) { 308 *outError = "Can't have more than one marked region along edge"; 309 *outTop = i; 310 return UNKNOWN_ERROR; 311 } 312 } else if (*outError == NULL) { 313 if (state == TICK_INSIDE_1) { 314 // We're done with this div. Move on to the next. 315 *outBottom = i-1; 316 outTop += 2; 317 outBottom += 2; 318 state = TICK_OUTSIDE_1; 319 } 320 } else { 321 *outTop = i; 322 return UNKNOWN_ERROR; 323 } 324 } 325 326 if (required && !found) { 327 *outError = "No marked region found along edge"; 328 *outTop = -1; 329 return UNKNOWN_ERROR; 330 } 331 332 return NO_ERROR; 333} 334 335static status_t get_horizontal_layout_bounds_ticks( 336 png_bytep row, int width, bool transparent, bool /* required */, 337 int32_t* outLeft, int32_t* outRight, const char** outError) 338{ 339 int i; 340 *outLeft = *outRight = 0; 341 342 // Look for left tick 343 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + 4, transparent, outError)) { 344 // Starting with a layout padding tick 345 i = 1; 346 while (i < width - 1) { 347 (*outLeft)++; 348 i++; 349 int tick = tick_type(row + i * 4, transparent, outError); 350 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 351 break; 352 } 353 } 354 } 355 356 // Look for right tick 357 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + (width - 2) * 4, transparent, outError)) { 358 // Ending with a layout padding tick 359 i = width - 2; 360 while (i > 1) { 361 (*outRight)++; 362 i--; 363 int tick = tick_type(row+i*4, transparent, outError); 364 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 365 break; 366 } 367 } 368 } 369 370 return NO_ERROR; 371} 372 373static status_t get_vertical_layout_bounds_ticks( 374 png_bytepp rows, int offset, int height, bool transparent, bool /* required */, 375 int32_t* outTop, int32_t* outBottom, const char** outError) 376{ 377 int i; 378 *outTop = *outBottom = 0; 379 380 // Look for top tick 381 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[1] + offset, transparent, outError)) { 382 // Starting with a layout padding tick 383 i = 1; 384 while (i < height - 1) { 385 (*outTop)++; 386 i++; 387 int tick = tick_type(rows[i] + offset, transparent, outError); 388 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 389 break; 390 } 391 } 392 } 393 394 // Look for bottom tick 395 if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[height - 2] + offset, transparent, outError)) { 396 // Ending with a layout padding tick 397 i = height - 2; 398 while (i > 1) { 399 (*outBottom)++; 400 i--; 401 int tick = tick_type(rows[i] + offset, transparent, outError); 402 if (tick != TICK_TYPE_LAYOUT_BOUNDS) { 403 break; 404 } 405 } 406 } 407 408 return NO_ERROR; 409} 410 411static void find_max_opacity(png_byte** rows, 412 int startX, int startY, int endX, int endY, int dX, int dY, 413 int* out_inset) 414{ 415 bool opaque_within_inset = true; 416 uint8_t max_opacity = 0; 417 int inset = 0; 418 *out_inset = 0; 419 for (int x = startX, y = startY; x != endX && y != endY; x += dX, y += dY, inset++) { 420 png_byte* color = rows[y] + x * 4; 421 uint8_t opacity = color[3]; 422 if (opacity > max_opacity) { 423 max_opacity = opacity; 424 *out_inset = inset; 425 } 426 if (opacity == 0xff) return; 427 } 428} 429 430static uint8_t max_alpha_over_row(png_byte* row, int startX, int endX) 431{ 432 uint8_t max_alpha = 0; 433 for (int x = startX; x < endX; x++) { 434 uint8_t alpha = (row + x * 4)[3]; 435 if (alpha > max_alpha) max_alpha = alpha; 436 } 437 return max_alpha; 438} 439 440static uint8_t max_alpha_over_col(png_byte** rows, int offsetX, int startY, int endY) 441{ 442 uint8_t max_alpha = 0; 443 for (int y = startY; y < endY; y++) { 444 uint8_t alpha = (rows[y] + offsetX * 4)[3]; 445 if (alpha > max_alpha) max_alpha = alpha; 446 } 447 return max_alpha; 448} 449 450static void get_outline(image_info* image) 451{ 452 int midX = image->width / 2; 453 int midY = image->height / 2; 454 int endX = image->width - 2; 455 int endY = image->height - 2; 456 457 // find left and right extent of nine patch content on center row 458 if (image->width > 4) { 459 find_max_opacity(image->rows, 1, midY, midX, -1, 1, 0, &image->outlineInsetsLeft); 460 find_max_opacity(image->rows, endX, midY, midX, -1, -1, 0, &image->outlineInsetsRight); 461 } else { 462 image->outlineInsetsLeft = 0; 463 image->outlineInsetsRight = 0; 464 } 465 466 // find top and bottom extent of nine patch content on center column 467 if (image->height > 4) { 468 find_max_opacity(image->rows, midX, 1, -1, midY, 0, 1, &image->outlineInsetsTop); 469 find_max_opacity(image->rows, midX, endY, -1, midY, 0, -1, &image->outlineInsetsBottom); 470 } else { 471 image->outlineInsetsTop = 0; 472 image->outlineInsetsBottom = 0; 473 } 474 475 int innerStartX = 1 + image->outlineInsetsLeft; 476 int innerStartY = 1 + image->outlineInsetsTop; 477 int innerEndX = endX - image->outlineInsetsRight; 478 int innerEndY = endY - image->outlineInsetsBottom; 479 int innerMidX = (innerEndX + innerStartX) / 2; 480 int innerMidY = (innerEndY + innerStartY) / 2; 481 482 // assuming the image is a round rect, compute the radius by marching 483 // diagonally from the top left corner towards the center 484 image->outlineAlpha = max(max_alpha_over_row(image->rows[innerMidY], innerStartX, innerEndX), 485 max_alpha_over_col(image->rows, innerMidX, innerStartY, innerStartY)); 486 487 int diagonalInset = 0; 488 find_max_opacity(image->rows, innerStartX, innerStartY, innerMidX, innerMidY, 1, 1, 489 &diagonalInset); 490 491 /* Determine source radius based upon inset: 492 * sqrt(r^2 + r^2) = sqrt(i^2 + i^2) + r 493 * sqrt(2) * r = sqrt(2) * i + r 494 * (sqrt(2) - 1) * r = sqrt(2) * i 495 * r = sqrt(2) / (sqrt(2) - 1) * i 496 */ 497 image->outlineRadius = 3.4142f * diagonalInset; 498 499 if (kIsDebug) { 500 printf("outline insets %d %d %d %d, rad %f, alpha %x\n", 501 image->outlineInsetsLeft, 502 image->outlineInsetsTop, 503 image->outlineInsetsRight, 504 image->outlineInsetsBottom, 505 image->outlineRadius, 506 image->outlineAlpha); 507 } 508} 509 510 511static uint32_t get_color( 512 png_bytepp rows, int left, int top, int right, int bottom) 513{ 514 png_bytep color = rows[top] + left*4; 515 516 if (left > right || top > bottom) { 517 return Res_png_9patch::TRANSPARENT_COLOR; 518 } 519 520 while (top <= bottom) { 521 for (int i = left; i <= right; i++) { 522 png_bytep p = rows[top]+i*4; 523 if (color[3] == 0) { 524 if (p[3] != 0) { 525 return Res_png_9patch::NO_COLOR; 526 } 527 } else if (p[0] != color[0] || p[1] != color[1] 528 || p[2] != color[2] || p[3] != color[3]) { 529 return Res_png_9patch::NO_COLOR; 530 } 531 } 532 top++; 533 } 534 535 if (color[3] == 0) { 536 return Res_png_9patch::TRANSPARENT_COLOR; 537 } 538 return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; 539} 540 541static status_t do_9patch(const char* imageName, image_info* image) 542{ 543 image->is9Patch = true; 544 545 int W = image->width; 546 int H = image->height; 547 int i, j; 548 549 int maxSizeXDivs = W * sizeof(int32_t); 550 int maxSizeYDivs = H * sizeof(int32_t); 551 int32_t* xDivs = image->xDivs = (int32_t*) malloc(maxSizeXDivs); 552 int32_t* yDivs = image->yDivs = (int32_t*) malloc(maxSizeYDivs); 553 uint8_t numXDivs = 0; 554 uint8_t numYDivs = 0; 555 556 int8_t numColors; 557 int numRows; 558 int numCols; 559 int top; 560 int left; 561 int right; 562 int bottom; 563 memset(xDivs, -1, maxSizeXDivs); 564 memset(yDivs, -1, maxSizeYDivs); 565 image->info9Patch.paddingLeft = image->info9Patch.paddingRight = 566 image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; 567 568 image->layoutBoundsLeft = image->layoutBoundsRight = 569 image->layoutBoundsTop = image->layoutBoundsBottom = 0; 570 571 png_bytep p = image->rows[0]; 572 bool transparent = p[3] == 0; 573 bool hasColor = false; 574 575 const char* errorMsg = NULL; 576 int errorPixel = -1; 577 const char* errorEdge = NULL; 578 579 int colorIndex = 0; 580 581 // Validate size... 582 if (W < 3 || H < 3) { 583 errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; 584 goto getout; 585 } 586 587 // Validate frame... 588 if (!transparent && 589 (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { 590 errorMsg = "Must have one-pixel frame that is either transparent or white"; 591 goto getout; 592 } 593 594 // Find left and right of sizing areas... 595 if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], 596 &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { 597 errorPixel = xDivs[0]; 598 errorEdge = "top"; 599 goto getout; 600 } 601 602 // Find top and bottom of sizing areas... 603 if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], 604 &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { 605 errorPixel = yDivs[0]; 606 errorEdge = "left"; 607 goto getout; 608 } 609 610 // Copy patch size data into image... 611 image->info9Patch.numXDivs = numXDivs; 612 image->info9Patch.numYDivs = numYDivs; 613 614 // Find left and right of padding area... 615 if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, 616 &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { 617 errorPixel = image->info9Patch.paddingLeft; 618 errorEdge = "bottom"; 619 goto getout; 620 } 621 622 // Find top and bottom of padding area... 623 if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, 624 &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { 625 errorPixel = image->info9Patch.paddingTop; 626 errorEdge = "right"; 627 goto getout; 628 } 629 630 // Find left and right of layout padding... 631 get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, 632 &image->layoutBoundsLeft, 633 &image->layoutBoundsRight, &errorMsg); 634 635 get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, 636 &image->layoutBoundsTop, 637 &image->layoutBoundsBottom, &errorMsg); 638 639 image->haveLayoutBounds = image->layoutBoundsLeft != 0 640 || image->layoutBoundsRight != 0 641 || image->layoutBoundsTop != 0 642 || image->layoutBoundsBottom != 0; 643 644 if (image->haveLayoutBounds) { 645 if (kIsDebug) { 646 printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, 647 image->layoutBoundsRight, image->layoutBoundsBottom); 648 } 649 } 650 651 // use opacity of pixels to estimate the round rect outline 652 get_outline(image); 653 654 // If padding is not yet specified, take values from size. 655 if (image->info9Patch.paddingLeft < 0) { 656 image->info9Patch.paddingLeft = xDivs[0]; 657 image->info9Patch.paddingRight = W - 2 - xDivs[1]; 658 } else { 659 // Adjust value to be correct! 660 image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; 661 } 662 if (image->info9Patch.paddingTop < 0) { 663 image->info9Patch.paddingTop = yDivs[0]; 664 image->info9Patch.paddingBottom = H - 2 - yDivs[1]; 665 } else { 666 // Adjust value to be correct! 667 image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; 668 } 669 670 if (kIsDebug) { 671 printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, 672 xDivs[0], xDivs[1], 673 yDivs[0], yDivs[1]); 674 printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, 675 image->info9Patch.paddingLeft, image->info9Patch.paddingRight, 676 image->info9Patch.paddingTop, image->info9Patch.paddingBottom); 677 } 678 679 // Remove frame from image. 680 image->rows = (png_bytepp)malloc((H-2) * sizeof(png_bytep)); 681 for (i=0; i<(H-2); i++) { 682 image->rows[i] = image->allocRows[i+1]; 683 memmove(image->rows[i], image->rows[i]+4, (W-2)*4); 684 } 685 image->width -= 2; 686 W = image->width; 687 image->height -= 2; 688 H = image->height; 689 690 // Figure out the number of rows and columns in the N-patch 691 numCols = numXDivs + 1; 692 if (xDivs[0] == 0) { // Column 1 is strechable 693 numCols--; 694 } 695 if (xDivs[numXDivs - 1] == W) { 696 numCols--; 697 } 698 numRows = numYDivs + 1; 699 if (yDivs[0] == 0) { // Row 1 is strechable 700 numRows--; 701 } 702 if (yDivs[numYDivs - 1] == H) { 703 numRows--; 704 } 705 706 // Make sure the amount of rows and columns will fit in the number of 707 // colors we can use in the 9-patch format. 708 if (numRows * numCols > 0x7F) { 709 errorMsg = "Too many rows and columns in 9-patch perimeter"; 710 goto getout; 711 } 712 713 numColors = numRows * numCols; 714 image->info9Patch.numColors = numColors; 715 image->colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); 716 717 // Fill in color information for each patch. 718 719 uint32_t c; 720 top = 0; 721 722 // The first row always starts with the top being at y=0 and the bottom 723 // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case 724 // the first row is stretchable along the Y axis, otherwise it is fixed. 725 // The last row always ends with the bottom being bitmap.height and the top 726 // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or 727 // yDivs[numYDivs-1]. In the former case the last row is stretchable along 728 // the Y axis, otherwise it is fixed. 729 // 730 // The first and last columns are similarly treated with respect to the X 731 // axis. 732 // 733 // The above is to help explain some of the special casing that goes on the 734 // code below. 735 736 // The initial yDiv and whether the first row is considered stretchable or 737 // not depends on whether yDiv[0] was zero or not. 738 for (j = (yDivs[0] == 0 ? 1 : 0); 739 j <= numYDivs && top < H; 740 j++) { 741 if (j == numYDivs) { 742 bottom = H; 743 } else { 744 bottom = yDivs[j]; 745 } 746 left = 0; 747 // The initial xDiv and whether the first column is considered 748 // stretchable or not depends on whether xDiv[0] was zero or not. 749 for (i = xDivs[0] == 0 ? 1 : 0; 750 i <= numXDivs && left < W; 751 i++) { 752 if (i == numXDivs) { 753 right = W; 754 } else { 755 right = xDivs[i]; 756 } 757 c = get_color(image->rows, left, top, right - 1, bottom - 1); 758 image->colors[colorIndex++] = c; 759 if (kIsDebug) { 760 if (c != Res_png_9patch::NO_COLOR) 761 hasColor = true; 762 } 763 left = right; 764 } 765 top = bottom; 766 } 767 768 assert(colorIndex == numColors); 769 770 for (i=0; i<numColors; i++) { 771 if (hasColor) { 772 if (i == 0) printf("Colors in %s:\n ", imageName); 773 printf(" #%08x", image->colors[i]); 774 if (i == numColors - 1) printf("\n"); 775 } 776 } 777getout: 778 if (errorMsg) { 779 fprintf(stderr, 780 "ERROR: 9-patch image %s malformed.\n" 781 " %s.\n", imageName, errorMsg); 782 if (errorEdge != NULL) { 783 if (errorPixel >= 0) { 784 fprintf(stderr, 785 " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); 786 } else { 787 fprintf(stderr, 788 " Found along %s edge.\n", errorEdge); 789 } 790 } 791 return UNKNOWN_ERROR; 792 } 793 return NO_ERROR; 794} 795 796static void checkNinePatchSerialization(Res_png_9patch* inPatch, void* data) 797{ 798 size_t patchSize = inPatch->serializedSize(); 799 void* newData = malloc(patchSize); 800 memcpy(newData, data, patchSize); 801 Res_png_9patch* outPatch = inPatch->deserialize(newData); 802 // deserialization is done in place, so outPatch == newData 803 assert(outPatch == newData); 804 assert(outPatch->numXDivs == inPatch->numXDivs); 805 assert(outPatch->numYDivs == inPatch->numYDivs); 806 assert(outPatch->paddingLeft == inPatch->paddingLeft); 807 assert(outPatch->paddingRight == inPatch->paddingRight); 808 assert(outPatch->paddingTop == inPatch->paddingTop); 809 assert(outPatch->paddingBottom == inPatch->paddingBottom); 810 for (int i = 0; i < outPatch->numXDivs; i++) { 811 assert(outPatch->xDivs[i] == inPatch->xDivs[i]); 812 } 813 for (int i = 0; i < outPatch->numYDivs; i++) { 814 assert(outPatch->yDivs[i] == inPatch->yDivs[i]); 815 } 816 for (int i = 0; i < outPatch->numColors; i++) { 817 assert(outPatch->colors[i] == inPatch->colors[i]); 818 } 819 free(newData); 820} 821 822static void dump_image(int w, int h, png_bytepp rows, int color_type) 823{ 824 int i, j, rr, gg, bb, aa; 825 826 int bpp; 827 if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { 828 bpp = 1; 829 } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { 830 bpp = 2; 831 } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 832 // We use a padding byte even when there is no alpha 833 bpp = 4; 834 } else { 835 printf("Unknown color type %d.\n", color_type); 836 } 837 838 for (j = 0; j < h; j++) { 839 png_bytep row = rows[j]; 840 for (i = 0; i < w; i++) { 841 rr = row[0]; 842 gg = row[1]; 843 bb = row[2]; 844 aa = row[3]; 845 row += bpp; 846 847 if (i == 0) { 848 printf("Row %d:", j); 849 } 850 switch (bpp) { 851 case 1: 852 printf(" (%d)", rr); 853 break; 854 case 2: 855 printf(" (%d %d", rr, gg); 856 break; 857 case 3: 858 printf(" (%d %d %d)", rr, gg, bb); 859 break; 860 case 4: 861 printf(" (%d %d %d %d)", rr, gg, bb, aa); 862 break; 863 } 864 if (i == (w - 1)) { 865 printf("\n"); 866 } 867 } 868 } 869} 870 871#define MAX(a,b) ((a)>(b)?(a):(b)) 872#define ABS(a) ((a)<0?-(a):(a)) 873 874static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, 875 png_colorp rgbPalette, png_bytep alphaPalette, 876 int *paletteEntries, bool *hasTransparency, int *colorType, 877 png_bytepp outRows) 878{ 879 int w = imageInfo.width; 880 int h = imageInfo.height; 881 int i, j, rr, gg, bb, aa, idx; 882 uint32_t colors[256], col; 883 int num_colors = 0; 884 int maxGrayDeviation = 0; 885 886 bool isOpaque = true; 887 bool isPalette = true; 888 bool isGrayscale = true; 889 890 // Scan the entire image and determine if: 891 // 1. Every pixel has R == G == B (grayscale) 892 // 2. Every pixel has A == 255 (opaque) 893 // 3. There are no more than 256 distinct RGBA colors 894 895 if (kIsDebug) { 896 printf("Initial image data:\n"); 897 dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); 898 } 899 900 for (j = 0; j < h; j++) { 901 png_bytep row = imageInfo.rows[j]; 902 png_bytep out = outRows[j]; 903 for (i = 0; i < w; i++) { 904 rr = *row++; 905 gg = *row++; 906 bb = *row++; 907 aa = *row++; 908 909 int odev = maxGrayDeviation; 910 maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); 911 maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); 912 maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); 913 if (maxGrayDeviation > odev) { 914 if (kIsDebug) { 915 printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", 916 maxGrayDeviation, i, j, rr, gg, bb, aa); 917 } 918 } 919 920 // Check if image is really grayscale 921 if (isGrayscale) { 922 if (rr != gg || rr != bb) { 923 if (kIsDebug) { 924 printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", 925 i, j, rr, gg, bb, aa); 926 } 927 isGrayscale = false; 928 } 929 } 930 931 // Check if image is really opaque 932 if (isOpaque) { 933 if (aa != 0xff) { 934 if (kIsDebug) { 935 printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", 936 i, j, rr, gg, bb, aa); 937 } 938 isOpaque = false; 939 } 940 } 941 942 // Check if image is really <= 256 colors 943 if (isPalette) { 944 col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); 945 bool match = false; 946 for (idx = 0; idx < num_colors; idx++) { 947 if (colors[idx] == col) { 948 match = true; 949 break; 950 } 951 } 952 953 // Write the palette index for the pixel to outRows optimistically 954 // We might overwrite it later if we decide to encode as gray or 955 // gray + alpha 956 *out++ = idx; 957 if (!match) { 958 if (num_colors == 256) { 959 if (kIsDebug) { 960 printf("Found 257th color at %d, %d\n", i, j); 961 } 962 isPalette = false; 963 } else { 964 colors[num_colors++] = col; 965 } 966 } 967 } 968 } 969 } 970 971 *paletteEntries = 0; 972 *hasTransparency = !isOpaque; 973 int bpp = isOpaque ? 3 : 4; 974 int paletteSize = w * h + bpp * num_colors; 975 976 if (kIsDebug) { 977 printf("isGrayscale = %s\n", isGrayscale ? "true" : "false"); 978 printf("isOpaque = %s\n", isOpaque ? "true" : "false"); 979 printf("isPalette = %s\n", isPalette ? "true" : "false"); 980 printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", 981 paletteSize, 2 * w * h, bpp * w * h); 982 printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance); 983 } 984 985 // Choose the best color type for the image. 986 // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel 987 // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations 988 // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA 989 // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently 990 // small, otherwise use COLOR_TYPE_RGB{_ALPHA} 991 if (isGrayscale) { 992 if (isOpaque) { 993 *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel 994 } else { 995 // Use a simple heuristic to determine whether using a palette will 996 // save space versus using gray + alpha for each pixel. 997 // This doesn't take into account chunk overhead, filtering, LZ 998 // compression, etc. 999 if (isPalette && (paletteSize < 2 * w * h)) { 1000 *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color 1001 } else { 1002 *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel 1003 } 1004 } 1005 } else if (isPalette && (paletteSize < bpp * w * h)) { 1006 *colorType = PNG_COLOR_TYPE_PALETTE; 1007 } else { 1008 if (maxGrayDeviation <= grayscaleTolerance) { 1009 printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); 1010 *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; 1011 } else { 1012 *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; 1013 } 1014 } 1015 1016 // Perform postprocessing of the image or palette data based on the final 1017 // color type chosen 1018 1019 if (*colorType == PNG_COLOR_TYPE_PALETTE) { 1020 // Create separate RGB and Alpha palettes and set the number of colors 1021 *paletteEntries = num_colors; 1022 1023 // Create the RGB and alpha palettes 1024 for (int idx = 0; idx < num_colors; idx++) { 1025 col = colors[idx]; 1026 rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); 1027 rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); 1028 rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); 1029 alphaPalette[idx] = (png_byte) (col & 0xff); 1030 } 1031 } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { 1032 // If the image is gray or gray + alpha, compact the pixels into outRows 1033 for (j = 0; j < h; j++) { 1034 png_bytep row = imageInfo.rows[j]; 1035 png_bytep out = outRows[j]; 1036 for (i = 0; i < w; i++) { 1037 rr = *row++; 1038 gg = *row++; 1039 bb = *row++; 1040 aa = *row++; 1041 1042 if (isGrayscale) { 1043 *out++ = rr; 1044 } else { 1045 *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); 1046 } 1047 if (!isOpaque) { 1048 *out++ = aa; 1049 } 1050 } 1051 } 1052 } 1053} 1054 1055 1056static void write_png(const char* imageName, 1057 png_structp write_ptr, png_infop write_info, 1058 image_info& imageInfo, int grayscaleTolerance) 1059{ 1060 png_uint_32 width, height; 1061 int color_type; 1062 int bit_depth, interlace_type, compression_type; 1063 int i; 1064 1065 png_unknown_chunk unknowns[3]; 1066 unknowns[0].data = NULL; 1067 unknowns[1].data = NULL; 1068 unknowns[2].data = NULL; 1069 1070 png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * sizeof(png_bytep)); 1071 if (outRows == (png_bytepp) 0) { 1072 printf("Can't allocate output buffer!\n"); 1073 exit(1); 1074 } 1075 for (i = 0; i < (int) imageInfo.height; i++) { 1076 outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); 1077 if (outRows[i] == (png_bytep) 0) { 1078 printf("Can't allocate output buffer!\n"); 1079 exit(1); 1080 } 1081 } 1082 1083 png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); 1084 1085 if (kIsDebug) { 1086 printf("Writing image %s: w = %d, h = %d\n", imageName, 1087 (int) imageInfo.width, (int) imageInfo.height); 1088 } 1089 1090 png_color rgbPalette[256]; 1091 png_byte alphaPalette[256]; 1092 bool hasTransparency; 1093 int paletteEntries; 1094 1095 analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, 1096 &paletteEntries, &hasTransparency, &color_type, outRows); 1097 1098 // If the image is a 9-patch, we need to preserve it as a ARGB file to make 1099 // sure the pixels will not be pre-dithered/clamped until we decide they are 1100 if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || 1101 color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { 1102 color_type = PNG_COLOR_TYPE_RGB_ALPHA; 1103 } 1104 1105 if (kIsDebug) { 1106 switch (color_type) { 1107 case PNG_COLOR_TYPE_PALETTE: 1108 printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", 1109 imageName, paletteEntries, 1110 hasTransparency ? " (with alpha)" : ""); 1111 break; 1112 case PNG_COLOR_TYPE_GRAY: 1113 printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName); 1114 break; 1115 case PNG_COLOR_TYPE_GRAY_ALPHA: 1116 printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName); 1117 break; 1118 case PNG_COLOR_TYPE_RGB: 1119 printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName); 1120 break; 1121 case PNG_COLOR_TYPE_RGB_ALPHA: 1122 printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName); 1123 break; 1124 } 1125 } 1126 1127 png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, 1128 8, color_type, PNG_INTERLACE_NONE, 1129 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); 1130 1131 if (color_type == PNG_COLOR_TYPE_PALETTE) { 1132 png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); 1133 if (hasTransparency) { 1134 png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); 1135 } 1136 png_set_filter(write_ptr, 0, PNG_NO_FILTERS); 1137 } else { 1138 png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); 1139 } 1140 1141 if (imageInfo.is9Patch) { 1142 int chunk_count = 2 + (imageInfo.haveLayoutBounds ? 1 : 0); 1143 int p_index = imageInfo.haveLayoutBounds ? 2 : 1; 1144 int b_index = 1; 1145 int o_index = 0; 1146 1147 // Chunks ordered thusly because older platforms depend on the base 9 patch data being last 1148 png_byte *chunk_names = imageInfo.haveLayoutBounds 1149 ? (png_byte*)"npOl\0npLb\0npTc\0" 1150 : (png_byte*)"npOl\0npTc"; 1151 1152 // base 9 patch data 1153 if (kIsDebug) { 1154 printf("Adding 9-patch info...\n"); 1155 } 1156 strcpy((char*)unknowns[p_index].name, "npTc"); 1157 unknowns[p_index].data = (png_byte*)imageInfo.serialize9patch(); 1158 unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); 1159 // TODO: remove the check below when everything works 1160 checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); 1161 1162 // automatically generated 9 patch outline data 1163 int chunk_size = sizeof(png_uint_32) * 6; 1164 strcpy((char*)unknowns[o_index].name, "npOl"); 1165 unknowns[o_index].data = (png_byte*) calloc(chunk_size, 1); 1166 png_byte outputData[chunk_size]; 1167 memcpy(&outputData, &imageInfo.outlineInsetsLeft, 4 * sizeof(png_uint_32)); 1168 ((float*) outputData)[4] = imageInfo.outlineRadius; 1169 ((png_uint_32*) outputData)[5] = imageInfo.outlineAlpha; 1170 memcpy(unknowns[o_index].data, &outputData, chunk_size); 1171 unknowns[o_index].size = chunk_size; 1172 1173 // optional optical inset / layout bounds data 1174 if (imageInfo.haveLayoutBounds) { 1175 int chunk_size = sizeof(png_uint_32) * 4; 1176 strcpy((char*)unknowns[b_index].name, "npLb"); 1177 unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); 1178 memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); 1179 unknowns[b_index].size = chunk_size; 1180 } 1181 1182 for (int i = 0; i < chunk_count; i++) { 1183 unknowns[i].location = PNG_HAVE_PLTE; 1184 } 1185 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1186 chunk_names, chunk_count); 1187 png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); 1188#if PNG_LIBPNG_VER < 10600 1189 /* Deal with unknown chunk location bug in 1.5.x and earlier */ 1190 png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); 1191 if (imageInfo.haveLayoutBounds) { 1192 png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); 1193 } 1194#endif 1195 } 1196 1197 1198 png_write_info(write_ptr, write_info); 1199 1200 png_bytepp rows; 1201 if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { 1202 if (color_type == PNG_COLOR_TYPE_RGB) { 1203 png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); 1204 } 1205 rows = imageInfo.rows; 1206 } else { 1207 rows = outRows; 1208 } 1209 png_write_image(write_ptr, rows); 1210 1211 if (kIsDebug) { 1212 printf("Final image data:\n"); 1213 dump_image(imageInfo.width, imageInfo.height, rows, color_type); 1214 } 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 if (kIsDebug) { 1231 printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", 1232 (int)width, (int)height, bit_depth, color_type, interlace_type, 1233 compression_type); 1234 } 1235} 1236 1237status_t preProcessImage(const Bundle* bundle, const sp<AaptAssets>& /* assets */, 1238 const sp<AaptFile>& file, String8* /* outNewLeafName */) 1239{ 1240 String8 ext(file->getPath().getPathExtension()); 1241 1242 // We currently only process PNG images. 1243 if (strcmp(ext.string(), ".png") != 0) { 1244 return NO_ERROR; 1245 } 1246 1247 // Example of renaming a file: 1248 //*outNewLeafName = file->getPath().getBasePath().getFileName(); 1249 //outNewLeafName->append(".nupng"); 1250 1251 String8 printableName(file->getPrintableSource()); 1252 1253 if (bundle->getVerbose()) { 1254 printf("Processing image: %s\n", printableName.string()); 1255 } 1256 1257 png_structp read_ptr = NULL; 1258 png_infop read_info = NULL; 1259 FILE* fp; 1260 1261 image_info imageInfo; 1262 1263 png_structp write_ptr = NULL; 1264 png_infop write_info = NULL; 1265 1266 status_t error = UNKNOWN_ERROR; 1267 1268 const size_t nameLen = file->getPath().length(); 1269 1270 fp = fopen(file->getSourceFile().string(), "rb"); 1271 if (fp == NULL) { 1272 fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); 1273 goto bail; 1274 } 1275 1276 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1277 (png_error_ptr)NULL); 1278 if (!read_ptr) { 1279 goto bail; 1280 } 1281 1282 read_info = png_create_info_struct(read_ptr); 1283 if (!read_info) { 1284 goto bail; 1285 } 1286 1287 if (setjmp(png_jmpbuf(read_ptr))) { 1288 goto bail; 1289 } 1290 1291 png_init_io(read_ptr, fp); 1292 1293 read_png(printableName.string(), read_ptr, read_info, &imageInfo); 1294 1295 if (nameLen > 6) { 1296 const char* name = file->getPath().string(); 1297 if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { 1298 if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { 1299 goto bail; 1300 } 1301 } 1302 } 1303 1304 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, 1305 (png_error_ptr)NULL); 1306 if (!write_ptr) 1307 { 1308 goto bail; 1309 } 1310 1311 write_info = png_create_info_struct(write_ptr); 1312 if (!write_info) 1313 { 1314 goto bail; 1315 } 1316 1317 png_set_write_fn(write_ptr, (void*)file.get(), 1318 png_write_aapt_file, png_flush_aapt_file); 1319 1320 if (setjmp(png_jmpbuf(write_ptr))) 1321 { 1322 goto bail; 1323 } 1324 1325 write_png(printableName.string(), write_ptr, write_info, imageInfo, 1326 bundle->getGrayscaleTolerance()); 1327 1328 error = NO_ERROR; 1329 1330 if (bundle->getVerbose()) { 1331 fseek(fp, 0, SEEK_END); 1332 size_t oldSize = (size_t)ftell(fp); 1333 size_t newSize = file->getSize(); 1334 float factor = ((float)newSize)/oldSize; 1335 int percent = (int)(factor*100); 1336 printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); 1337 } 1338 1339bail: 1340 if (read_ptr) { 1341 png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); 1342 } 1343 if (fp) { 1344 fclose(fp); 1345 } 1346 if (write_ptr) { 1347 png_destroy_write_struct(&write_ptr, &write_info); 1348 } 1349 1350 if (error != NO_ERROR) { 1351 fprintf(stderr, "ERROR: Failure processing PNG image %s\n", 1352 file->getPrintableSource().string()); 1353 } 1354 return error; 1355} 1356 1357status_t preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) 1358{ 1359 png_structp read_ptr = NULL; 1360 png_infop read_info = NULL; 1361 1362 FILE* fp; 1363 1364 image_info imageInfo; 1365 1366 png_structp write_ptr = NULL; 1367 png_infop write_info = NULL; 1368 1369 status_t error = UNKNOWN_ERROR; 1370 1371 if (bundle->getVerbose()) { 1372 printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); 1373 } 1374 1375 // Get a file handler to read from 1376 fp = fopen(source.string(),"rb"); 1377 if (fp == NULL) { 1378 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); 1379 return error; 1380 } 1381 1382 // Call libpng to get a struct to read image data into 1383 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1384 if (!read_ptr) { 1385 fclose(fp); 1386 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1387 return error; 1388 } 1389 1390 // Call libpng to get a struct to read image info into 1391 read_info = png_create_info_struct(read_ptr); 1392 if (!read_info) { 1393 fclose(fp); 1394 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1395 return error; 1396 } 1397 1398 // Set a jump point for libpng to long jump back to on error 1399 if (setjmp(png_jmpbuf(read_ptr))) { 1400 fclose(fp); 1401 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1402 return error; 1403 } 1404 1405 // Set up libpng to read from our file. 1406 png_init_io(read_ptr,fp); 1407 1408 // Actually read data from the file 1409 read_png(source.string(), read_ptr, read_info, &imageInfo); 1410 1411 // We're done reading so we can clean up 1412 // Find old file size before releasing handle 1413 fseek(fp, 0, SEEK_END); 1414 size_t oldSize = (size_t)ftell(fp); 1415 fclose(fp); 1416 png_destroy_read_struct(&read_ptr, &read_info,NULL); 1417 1418 // Check to see if we're dealing with a 9-patch 1419 // If we are, process appropriately 1420 if (source.getBasePath().getPathExtension() == ".9") { 1421 if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { 1422 return error; 1423 } 1424 } 1425 1426 // Call libpng to create a structure to hold the processed image data 1427 // that can be written to disk 1428 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 1429 if (!write_ptr) { 1430 png_destroy_write_struct(&write_ptr, &write_info); 1431 return error; 1432 } 1433 1434 // Call libpng to create a structure to hold processed image info that can 1435 // be written to disk 1436 write_info = png_create_info_struct(write_ptr); 1437 if (!write_info) { 1438 png_destroy_write_struct(&write_ptr, &write_info); 1439 return error; 1440 } 1441 1442 // Open up our destination file for writing 1443 fp = fopen(dest.string(), "wb"); 1444 if (!fp) { 1445 fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); 1446 png_destroy_write_struct(&write_ptr, &write_info); 1447 return error; 1448 } 1449 1450 // Set up libpng to write to our file 1451 png_init_io(write_ptr, fp); 1452 1453 // Set up a jump for libpng to long jump back on on errors 1454 if (setjmp(png_jmpbuf(write_ptr))) { 1455 fclose(fp); 1456 png_destroy_write_struct(&write_ptr, &write_info); 1457 return error; 1458 } 1459 1460 // Actually write out to the new png 1461 write_png(dest.string(), write_ptr, write_info, imageInfo, 1462 bundle->getGrayscaleTolerance()); 1463 1464 if (bundle->getVerbose()) { 1465 // Find the size of our new file 1466 FILE* reader = fopen(dest.string(), "rb"); 1467 fseek(reader, 0, SEEK_END); 1468 size_t newSize = (size_t)ftell(reader); 1469 fclose(reader); 1470 1471 float factor = ((float)newSize)/oldSize; 1472 int percent = (int)(factor*100); 1473 printf(" (processed image to cache entry %s: %d%% size of source)\n", 1474 dest.string(), percent); 1475 } 1476 1477 //Clean up 1478 fclose(fp); 1479 png_destroy_write_struct(&write_ptr, &write_info); 1480 1481 return NO_ERROR; 1482} 1483 1484status_t postProcessImage(const Bundle* bundle, const sp<AaptAssets>& assets, 1485 ResourceTable* table, const sp<AaptFile>& file) 1486{ 1487 String8 ext(file->getPath().getPathExtension()); 1488 1489 // At this point, now that we have all the resource data, all we need to 1490 // do is compile XML files. 1491 if (strcmp(ext.string(), ".xml") == 0) { 1492 String16 resourceName(parseResourceName(file->getPath().getPathLeaf())); 1493 return compileXmlFile(bundle, assets, resourceName, file, table); 1494 } 1495 1496 return NO_ERROR; 1497} 1498