---

pngtest.c

/* pngtest.c - a test program for libpng * * Copyright (c) 2018-2024 Cosmin Truta * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson * Copyright (c) 1996-1997 Andreas Dilger * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h * * This program reads in a PNG image, writes it out again, and then * compares the two files. If the files are identical, this shows that * the basic chunk handling, filtering, and (de)compression code is working * properly. It does not currently test all of the transforms, although * it probably should. * * The program will report "FAIL" in certain legitimate cases: * 1) when the compression level or filter selection method is changed. * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192. * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks * exist in the input file. * 4) others not listed here... * In these cases, it is best to check with another tool such as "pngcheck" * to see what the differences between the two files are. * * If a filename is given on the command-line, then this file is used * for the input, rather than the default "pngtest.png". This allows * testing a wide variety of files easily. You can also test a number * of files at once by typing "pngtest -m file1.png file2.png ..." */ #define _POSIX_SOURCE 1 #include <stdio.h> #include <stdlib.h> #include <string.h> #ifdef PNG_ZLIB_HEADER # include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */ #else # include <zlib.h> #endif #include "png.h" /* Generate a compiler error if there is an old png.h in the search path. */ typedef png_libpng_version_1_6_43 Your_png_h_is_not_version_1_6_43; /* Ensure that all version numbers in png.h are consistent with one another. */ #if (PNG_LIBPNG_VER != PNG_LIBPNG_VER_MAJOR * 10000 + \ PNG_LIBPNG_VER_MINOR * 100 + \ PNG_LIBPNG_VER_RELEASE) || \ (PNG_LIBPNG_VER_SHAREDLIB != PNG_LIBPNG_VER_MAJOR * 10 + \ PNG_LIBPNG_VER_MINOR) || \ (PNG_LIBPNG_VER_SHAREDLIB != PNG_LIBPNG_VER_SONUM) || \ (PNG_LIBPNG_VER_SHAREDLIB != PNG_LIBPNG_VER_DLLNUM) # error "Inconsistent version numbers in png.h" #endif /* In version 1.6.1, we added support for the configure test harness, which * uses 77 to indicate a skipped test. On the other hand, in cmake build tests, * we still need to succeed on a skipped test, so: */ #if defined(HAVE_CONFIG_H) # define SKIP 77 #else # define SKIP 0 #endif /* Known chunks that exist in pngtest.png must be supported, or pngtest will * fail simply as a result of re-ordering them. This may be fixed in the next * generation of libpng. * * pngtest allocates a single row buffer for each row and overwrites it, * therefore if the write side doesn't support the writing of interlaced images * nothing can be done for an interlaced image (and the code below will fail * horribly trying to write extra data after writing garbage). */ #if defined PNG_READ_SUPPORTED && /* else nothing can be done */ \ defined PNG_READ_bKGD_SUPPORTED && \ defined PNG_READ_cHRM_SUPPORTED && \ defined PNG_READ_gAMA_SUPPORTED && \ defined PNG_READ_oFFs_SUPPORTED && \ defined PNG_READ_pCAL_SUPPORTED && \ defined PNG_READ_pHYs_SUPPORTED && \ defined PNG_READ_sBIT_SUPPORTED && \ defined PNG_READ_sCAL_SUPPORTED && \ defined PNG_READ_sRGB_SUPPORTED && \ defined PNG_READ_sPLT_SUPPORTED && \ defined PNG_READ_tEXt_SUPPORTED && \ defined PNG_READ_tIME_SUPPORTED && \ defined PNG_READ_zTXt_SUPPORTED && \ (defined PNG_WRITE_INTERLACING_SUPPORTED || PNG_LIBPNG_VER >= 10700) /* Copied from pngpriv.h but only used in error messages below. */ #ifndef PNG_ZBUF_SIZE # define PNG_ZBUF_SIZE 8192 #endif #ifndef PNG_STDIO_SUPPORTED typedef FILE * png_FILE_p; #endif /* This hack was introduced for historical reasons, and we are * still keeping it in libpng-1.6.x for compatibility reasons. */ #define STDERR stdout #ifndef PNG_DEBUG # define PNG_DEBUG 0 #endif #if PNG_DEBUG > 1 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n")) # define pngtest_debug1(m, p1) ((void)fprintf(stderr, m "\n", p1)) # define pngtest_debug2(m, p1, p2) ((void)fprintf(stderr, m "\n", p1, p2)) #elif PNG_DEBUG == 0 || PNG_DEBUG == 1 # define pngtest_debug(m) ((void)0) # define pngtest_debug1(m, p1) ((void)0) # define pngtest_debug2(m, p1, p2) ((void)0) #else /* PNG_DEBUG < 0 */ # error "Bad PNG_DEBUG value" #endif /* Turn on CPU timing #define PNGTEST_TIMING */ #ifndef PNG_FLOATING_POINT_SUPPORTED #undef PNGTEST_TIMING #endif #ifdef PNGTEST_TIMING static float t_start, t_stop, t_decode, t_encode, t_misc; #include <time.h> #endif #ifdef PNG_TIME_RFC1123_SUPPORTED static int tIME_chunk_present = 0; static char tIME_string[29] = "tIME chunk is not present"; /* This use case is deprecated. * See the declaration of png_convert_to_rfc1123_buffer for more details. */ #endif static int verbose = 0; static int strict = 0; static int relaxed = 0; static int xfail = 0; static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */ static int error_count = 0; /* count calls to png_error */ static int warning_count = 0; /* count calls to png_warning */ /* Example of using row callbacks to make a simple progress meter */ static int status_pass = 1; static int status_dots_requested = 0; static int status_dots = 1; static void PNGCBAPI read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { /* The callback should always receive correct parameters. */ if (png_ptr == NULL) png_error(png_ptr, "read_row_callback: bad png_ptr"); if (row_number > PNG_UINT_31_MAX) png_error(png_ptr, "read_row_callback: bad row number"); if (pass < 0 || pass > 7) png_error(png_ptr, "read_row_callback: bad pass"); if (status_pass != pass) { fprintf(stdout, "\n Pass %d: ", pass); status_pass = pass; status_dots = 31; } status_dots--; if (status_dots == 0) { fprintf(stdout, "\n "); status_dots = 30; } fprintf(stdout, "r"); } #ifdef PNG_WRITE_SUPPORTED static void PNGCBAPI write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { /* The callback should always receive correct parameters. */ if (png_ptr == NULL) png_error(png_ptr, "write_row_callback: bad png_ptr"); if (row_number > PNG_UINT_31_MAX) png_error(png_ptr, "write_row_callback: bad row number"); if (pass < 0 || pass > 7) png_error(png_ptr, "write_row_callback: bad pass"); fprintf(stdout, "w"); } #endif #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED /* Example of using a user transform callback (doesn't do anything at present). */ static void PNGCBAPI read_user_callback(png_structp png_ptr, png_row_infop row_info, png_bytep data) { /* The callback should always receive correct parameters. */ if (png_ptr == NULL) png_error(png_ptr, "read_user_callback: bad png_ptr"); if (row_info == NULL) png_error(png_ptr, "read_user_callback: bad row info"); if (data == NULL) png_error(png_ptr, "read_user_callback: bad data"); } #endif #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED /* Example of using user transform callback (we don't transform anything, * but merely count the zero samples) */ static png_uint_32 zero_samples; static void PNGCBAPI count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) { png_bytep dp = data; /* The callback should always receive correct parameters. */ if (png_ptr == NULL) png_error(png_ptr, "count_zero_samples: bad png_ptr"); if (row_info == NULL) png_error(png_ptr, "count_zero_samples: bad row info"); if (data == NULL) png_error(png_ptr, "count_zero_samples: bad data"); /* Contents of row_info: * png_uint_32 width width of row * png_uint_32 rowbytes number of bytes in row * png_byte color_type color type of pixels * png_byte bit_depth bit depth of samples * png_byte channels number of channels (1-4) * png_byte pixel_depth bits per pixel (depth*channels) */ /* Counts the number of zero samples (or zero pixels if color_type is 3 */ if (row_info->color_type == 0 || row_info->color_type == 3) { int pos = 0; png_uint_32 n, nstop; for (n = 0, nstop = row_info->width; n < nstop; n++) { if (row_info->bit_depth == 1) { if (((*dp << pos++ ) & 0x80) == 0) zero_samples++; if (pos == 8) { pos = 0; dp++; } } if (row_info->bit_depth == 2) { if (((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++; if (pos == 8) { pos = 0; dp++; } } if (row_info->bit_depth == 4) { if (((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++; if (pos == 8) { pos = 0; dp++; } } if (row_info->bit_depth == 8) if (*dp++ == 0) zero_samples++; if (row_info->bit_depth == 16) { if ((*dp | *(dp+1)) == 0) zero_samples++; dp += 2; } } } else /* Other color types */ { png_uint_32 n, nstop; int channel; int color_channels = row_info->channels; if (row_info->color_type > 3) color_channels--; for (n = 0, nstop = row_info->width; n < nstop; n++) { for (channel = 0; channel < color_channels; channel++) { if (row_info->bit_depth == 8) if (*dp++ == 0) zero_samples++; if (row_info->bit_depth == 16) { if ((*dp | *(dp+1)) == 0) zero_samples++; dp += 2; } } if (row_info->color_type > 3) { dp++; if (row_info->bit_depth == 16) dp++; } } } } #endif /* WRITE_USER_TRANSFORM */ #ifndef PNG_STDIO_SUPPORTED /* START of code to validate stdio-free compilation */ /* These copies of the default read/write functions come from pngrio.c and * pngwio.c. They allow "don't include stdio" testing of the library. * This is the function that does the actual reading of data. If you are * not reading from a standard C stream, you should create a replacement * read_data function and use it at run time with png_set_read_fn(), rather * than changing the library. */ #ifdef PNG_IO_STATE_SUPPORTED void pngtest_check_io_state(png_structp png_ptr, size_t data_length, png_uint_32 io_op) { png_uint_32 io_state = png_get_io_state(png_ptr); int err = 0; /* Check if the current operation (reading / writing) is as expected. */ if ((io_state & PNG_IO_MASK_OP) != io_op) png_error(png_ptr, "Incorrect operation in I/O state"); /* Check if the buffer size specific to the current location * (file signature / header / data / crc) is as expected. */ switch ((io_state & PNG_IO_MASK_LOC) != 0) { case PNG_IO_SIGNATURE: if (data_length > 8) err = 1; break; case PNG_IO_CHUNK_HDR: if (data_length != 8) err = 1; break; case PNG_IO_CHUNK_DATA: break; /* no restrictions here */ case PNG_IO_CHUNK_CRC: if (data_length != 4) err = 1; break; default: err = 1; /* uninitialized */ } if (err != 0) png_error(png_ptr, "Bad I/O state or buffer size"); } #endif static void PNGCBAPI pngtest_read_data(png_structp png_ptr, png_bytep data, size_t length) { size_t check = 0; png_voidp io_ptr; if (png_ptr == NULL) png_error(png_ptr, "pngtest_read_data: bad png_ptr"); /* fread() returns 0 on error, so it is OK to store this in a size_t * instead of an int, which is what fread() actually returns. */ io_ptr = png_get_io_ptr(png_ptr); if (io_ptr != NULL) check = fread(data, 1, length, (png_FILE_p)io_ptr); if (check != length) png_error(png_ptr, "Read Error"); #ifdef PNG_IO_STATE_SUPPORTED pngtest_check_io_state(png_ptr, length, PNG_IO_READING); #endif } #ifdef PNG_WRITE_FLUSH_SUPPORTED static void PNGCBAPI pngtest_flush(png_structp png_ptr) { if (png_ptr == NULL) png_error(png_ptr, "pngtest_flush: bad png_ptr"); /* Do nothing; fflush() is said to be just a waste of energy. */ } #endif /* This is the function that does the actual writing of data. If you are * not writing to a standard C stream, you should create a replacement * write_data function and use it at run time with png_set_write_fn(), rather * than changing the library. */ static void PNGCBAPI pngtest_write_data(png_structp png_ptr, png_bytep data, size_t length) { size_t check; if (png_ptr == NULL) png_error(png_ptr, "pngtest_write_data: bad png_ptr"); check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr)); if (check != length) png_error(png_ptr, "Write Error"); #ifdef PNG_IO_STATE_SUPPORTED pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING); #endif } #endif /* !STDIO */ /* This function is called when there is a warning, but the library thinks * it can continue anyway. Replacement functions don't have to do anything * here if you don't want to. In the default configuration, png_ptr is * not used, but it is passed in case it may be useful. */ typedef struct { const char *file_name; } pngtest_error_parameters; static void PNGCBAPI pngtest_warning(png_structp png_ptr, png_const_charp message) { const char *name = "UNKNOWN (ERROR!)"; pngtest_error_parameters *test = (pngtest_error_parameters*)png_get_error_ptr(png_ptr); ++warning_count; if (test != NULL && test->file_name != NULL) name = test->file_name; fprintf(STDERR, "\n%s: libpng warning: %s\n", name, message); } /* This is the default error handling function. Note that replacements for * this function MUST NOT RETURN, or the program will likely crash. This * function is used by default, or if the program supplies NULL for the * error function pointer in png_set_error_fn(). */ static void PNGCBAPI pngtest_error(png_structp png_ptr, png_const_charp message) { ++error_count; pngtest_warning(png_ptr, message); /* We can return because png_error calls the default handler, which is * actually OK in this case. */ } /* END of code to validate stdio-free compilation */ /* START of code to validate memory allocation and deallocation */ #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG /* Allocate memory. For reasonable files, size should never exceed * 64K. However, zlib may allocate more than 64K if you don't tell * it not to. See zconf.h and png.h for more information. zlib does * need to allocate exactly 64K, so whatever you call here must * have the ability to do that. * * This piece of code can be compiled to validate max 64K allocations * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. */ typedef struct memory_information { png_alloc_size_t size; png_voidp pointer; struct memory_information *next; } memory_information; typedef memory_information *memory_infop; static memory_infop pinformation = NULL; static int current_allocation = 0; static int maximum_allocation = 0; static int total_allocation = 0; static int num_allocations = 0; png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr, png_alloc_size_t size)); void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr)); png_voidp PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size) { /* png_malloc has already tested for NULL; png_create_struct calls * png_debug_malloc directly, with png_ptr == NULL which is OK */ if (size == 0) return NULL; /* This calls the library allocator twice, once to get the requested buffer and once to get a new free list entry. */ { /* Disable malloc_fn and free_fn */ memory_infop pinfo; png_set_mem_fn(png_ptr, NULL, NULL, NULL); pinfo = (memory_infop)png_malloc(png_ptr, (sizeof *pinfo)); pinfo->size = size; current_allocation += size; total_allocation += size; ++num_allocations; if (current_allocation > maximum_allocation) maximum_allocation = current_allocation; pinfo->pointer = png_malloc(png_ptr, size); /* Restore malloc_fn and free_fn */ png_set_mem_fn(png_ptr, NULL, png_debug_malloc, png_debug_free); if (size != 0 && pinfo->pointer == NULL) { current_allocation -= size; total_allocation -= size; png_error(png_ptr, "out of memory in pngtest->png_debug_malloc"); } pinfo->next = pinformation; pinformation = pinfo; /* Make sure the caller isn't assuming zeroed memory. */ memset(pinfo->pointer, 0xdd, pinfo->size); if (verbose != 0) printf("png_malloc %lu bytes at %p\n", (unsigned long)size, pinfo->pointer); return (png_voidp)pinfo->pointer; } } /* Free a pointer. It is removed from the list at the same time. */ void PNGCBAPI png_debug_free(png_structp png_ptr, png_voidp ptr) { if (png_ptr == NULL) fprintf(STDERR, "NULL pointer to png_debug_free.\n"); if (ptr == 0) { #if 0 /* This happens all the time. */ fprintf(STDERR, "WARNING: freeing NULL pointer\n"); #endif return; } /* Unlink the element from the list. */ if (pinformation != NULL) { memory_infop *ppinfo = &pinformation; for (;;) { memory_infop pinfo = *ppinfo; if (pinfo->pointer == ptr) { *ppinfo = pinfo->next; current_allocation -= pinfo->size; if (current_allocation < 0) fprintf(STDERR, "Duplicate free of memory\n"); /* We must free the list element too, but first kill the memory that is to be freed. */ memset(ptr, 0x55, pinfo->size); free(pinfo); pinfo = NULL; break; } if (pinfo->next == NULL) { fprintf(STDERR, "Pointer %p not found\n", ptr); break; } ppinfo = &pinfo->next; } } /* Finally free the data. */ if (verbose != 0) printf("Freeing %p\n", ptr); if (ptr != NULL) free(ptr); ptr = NULL; } #endif /* USER_MEM && DEBUG */ /* END of code to test memory allocation/deallocation */ #ifdef PNG_READ_USER_CHUNKS_SUPPORTED /* Demonstration of user chunk support of the sTER and vpAg chunks */ /* (sTER is a public chunk not yet known by libpng. vpAg is a private chunk used in ImageMagick to store "virtual page" size). */ typedef struct user_chunk_info_def { png_const_infop info_ptr; png_uint_32 vpAg_width, vpAg_height; png_byte vpAg_units; png_byte sTER_mode; int location[2]; } user_chunk_info; /* Used for location and order; zero means nothing. */ #define have_sTER 0x01 #define have_vpAg 0x02 #define before_PLTE 0x10 #define before_IDAT 0x20 #define after_IDAT 0x40 static void init_user_chunk_info(png_const_infop info_ptr, user_chunk_info *chunk_data) { memset(chunk_data, 0, sizeof(*chunk_data)); chunk_data->info_ptr = info_ptr; } static int set_chunk_location(png_structp png_ptr, user_chunk_info *chunk_data, int what) { int location; if ((chunk_data->location[0] & what) != 0 || (chunk_data->location[1] & what) != 0) return 0; /* we already have one of these */ /* Find where we are (the code below zeroes info_ptr to indicate that the * chunks before the first IDAT have been read.) */ if (chunk_data->info_ptr == NULL) /* after IDAT */ location = what | after_IDAT; else if (png_get_valid(png_ptr, chunk_data->info_ptr, PNG_INFO_PLTE) != 0) location = what | before_IDAT; else location = what | before_PLTE; if (chunk_data->location[0] == 0) chunk_data->location[0] = location; else chunk_data->location[1] = location; return 1; /* handled */ } static int PNGCBAPI read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk) { user_chunk_info *my_user_chunk_data = (user_chunk_info*)png_get_user_chunk_ptr(png_ptr); if (my_user_chunk_data == NULL) png_error(png_ptr, "lost pointer to user chunk data"); /* Return one of the following: * return -n; chunk had an error * return 0; did not recognize * return n; success * * The unknown chunk structure contains the chunk data: * png_byte name[5]; * png_byte *data; * size_t size; * * Note that libpng has already taken care of the CRC handling. */ if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */ chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */ { /* Found sTER chunk */ if (chunk->size != 1) return -1; /* Error return */ if (chunk->data[0] != 0 && chunk->data[0] != 1) return -1; /* Invalid mode */ if (set_chunk_location(png_ptr, my_user_chunk_data, have_sTER) != 0) { my_user_chunk_data->sTER_mode = chunk->data[0]; return 1; } else return 0; /* duplicate sTER - give it to libpng */ } if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */ chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */ return 0; /* Did not recognize */ /* Found ImageMagick vpAg chunk */ if (chunk->size != 9) return -1; /* Error return */ if (set_chunk_location(png_ptr, my_user_chunk_data, have_vpAg) == 0) return 0; /* duplicate vpAg */ my_user_chunk_data->vpAg_width = png_get_uint_31(png_ptr, chunk->data); my_user_chunk_data->vpAg_height = png_get_uint_31(png_ptr, chunk->data + 4); my_user_chunk_data->vpAg_units = chunk->data[8]; return 1; } #ifdef PNG_WRITE_SUPPORTED static void write_sTER_chunk(png_structp write_ptr, user_chunk_info *data) { png_byte sTER[5] = {115, 84, 69, 82, '\0'}; if (verbose != 0) fprintf(STDERR, "\n stereo mode = %d\n", data->sTER_mode); png_write_chunk(write_ptr, sTER, &data->sTER_mode, 1); } static void write_vpAg_chunk(png_structp write_ptr, user_chunk_info *data) { png_byte vpAg[5] = {118, 112, 65, 103, '\0'}; png_byte vpag_chunk_data[9]; if (verbose != 0) fprintf(STDERR, " vpAg = %lu x %lu, units = %d\n", (unsigned long)data->vpAg_width, (unsigned long)data->vpAg_height, data->vpAg_units); png_save_uint_32(vpag_chunk_data, data->vpAg_width); png_save_uint_32(vpag_chunk_data + 4, data->vpAg_height); vpag_chunk_data[8] = data->vpAg_units; png_write_chunk(write_ptr, vpAg, vpag_chunk_data, 9); } static void write_chunks(png_structp write_ptr, user_chunk_info *data, int location) { int i; /* Notice that this preserves the original chunk order, however chunks * intercepted by the callback will be written *after* chunks passed to * libpng. This will actually reverse a pair of sTER chunks or a pair of * vpAg chunks, resulting in an error later. This is not worth worrying * about - the chunks should not be duplicated! */ for (i = 0; i < 2; ++i) { if (data->location[i] == (location | have_sTER)) write_sTER_chunk(write_ptr, data); else if (data->location[i] == (location | have_vpAg)) write_vpAg_chunk(write_ptr, data); } } #endif /* WRITE */ #else /* !READ_USER_CHUNKS */ # define write_chunks(pp,loc) ((void)0) #endif /* END of code to demonstrate user chunk support */ /* START of code to check that libpng has the required text support; this only * checks for the write support because if read support is missing the chunk * will simply not be reported back to pngtest. */ #ifdef PNG_TEXT_SUPPORTED static void pngtest_check_text_support(png_structp png_ptr, png_textp text_ptr, int num_text) { while (num_text > 0) { switch (text_ptr[--num_text].compression) { case PNG_TEXT_COMPRESSION_NONE: break; case PNG_TEXT_COMPRESSION_zTXt: # ifndef PNG_WRITE_zTXt_SUPPORTED ++unsupported_chunks; /* In libpng 1.7 this now does an app-error, so stop it: */ text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE; # endif break; case PNG_ITXT_COMPRESSION_NONE: case PNG_ITXT_COMPRESSION_zTXt: # ifndef PNG_WRITE_iTXt_SUPPORTED ++unsupported_chunks; text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE; # endif break; default: /* This is an error */ png_error(png_ptr, "invalid text chunk compression field"); break; } } } #endif /* END of code to check that libpng has the required text support */ /* Test one file */ static int test_one_file(const char *inname, const char *outname) { static png_FILE_p fpin; static png_FILE_p fpout; /* "static" prevents setjmp corruption */ pngtest_error_parameters error_parameters; png_structp read_ptr; png_infop read_info_ptr, end_info_ptr; #ifdef PNG_WRITE_SUPPORTED png_structp write_ptr; png_infop write_info_ptr; png_infop write_end_info_ptr; #ifdef PNG_WRITE_FILTER_SUPPORTED int interlace_preserved = 1; #endif /* WRITE_FILTER */ #else /* !WRITE */ png_structp write_ptr = NULL; png_infop write_info_ptr = NULL; png_infop write_end_info_ptr = NULL; #endif /* !WRITE */ png_bytep row_buf; png_uint_32 y; png_uint_32 width, height; int bit_depth, color_type; user_chunk_info my_user_chunk_data; int pass, num_passes; row_buf = NULL; error_parameters.file_name = inname; if ((fpin = fopen(inname, "rb")) == NULL) { fprintf(STDERR, "Could not find input file %s\n", inname); return 1; } if ((fpout = fopen(outname, "wb")) == NULL) { fprintf(STDERR, "Could not open output file %s\n", outname); fclose(fpin); return 1; } pngtest_debug("Allocating read and write structures"); #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL, NULL, png_debug_malloc, png_debug_free); #else read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); #endif png_set_error_fn(read_ptr, &error_parameters, pngtest_error, pngtest_warning); #ifdef PNG_WRITE_SUPPORTED #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL, NULL, png_debug_malloc, png_debug_free); #else write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); #endif png_set_error_fn(write_ptr, &error_parameters, pngtest_error, pngtest_warning); #endif pngtest_debug("Allocating read_info, write_info and end_info structures"); read_info_ptr = png_create_info_struct(read_ptr); end_info_ptr = png_create_info_struct(read_ptr); #ifdef PNG_WRITE_SUPPORTED write_info_ptr = png_create_info_struct(write_ptr); write_end_info_ptr = png_create_info_struct(write_ptr); #endif #ifdef PNG_READ_USER_CHUNKS_SUPPORTED init_user_chunk_info(read_info_ptr, &my_user_chunk_data); png_set_read_user_chunk_fn(read_ptr, &my_user_chunk_data, read_user_chunk_callback); #endif #ifdef PNG_SETJMP_SUPPORTED pngtest_debug("Setting jmpbuf for read struct"); if (setjmp(png_jmpbuf(read_ptr))) { fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname); png_free(read_ptr, row_buf); row_buf = NULL; if (verbose != 0) fprintf(STDERR, " destroy read structs\n"); png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); #ifdef PNG_WRITE_SUPPORTED if (verbose != 0) fprintf(STDERR, " destroy write structs\n"); png_destroy_info_struct(write_ptr, &write_end_info_ptr); png_destroy_write_struct(&write_ptr, &write_info_ptr); #endif fclose(fpin); fclose(fpout); return 1; } #ifdef PNG_WRITE_SUPPORTED pngtest_debug("Setting jmpbuf for write struct"); if (setjmp(png_jmpbuf(write_ptr))) { fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname); png_free(read_ptr, row_buf); row_buf = NULL; if (verbose != 0) fprintf(STDERR, " destroying read structs\n"); png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); if (verbose != 0) fprintf(STDERR, " destroying write structs\n"); png_destroy_info_struct(write_ptr, &write_end_info_ptr); png_destroy_write_struct(&write_ptr, &write_info_ptr); fclose(fpin); fclose(fpout); return 1; } #endif #endif #ifdef PNG_BENIGN_ERRORS_SUPPORTED if (strict != 0) { /* Treat png_benign_error() as errors on read */ png_set_benign_errors(read_ptr, 0); # ifdef PNG_WRITE_SUPPORTED /* Treat them as errors on write */ png_set_benign_errors(write_ptr, 0); # endif /* if strict is not set, then app warnings and errors are treated as * warnings in release builds, but not in unstable builds; this can be * changed with '--relaxed'. */ } else if (relaxed != 0) { /* Allow application (pngtest) errors and warnings to pass */ png_set_benign_errors(read_ptr, 1); /* Turn off CRC checking while reading */ png_set_crc_action(read_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE); #ifdef PNG_IGNORE_ADLER32 /* Turn off ADLER32 checking while reading */ png_set_option(read_ptr, PNG_IGNORE_ADLER32, PNG_OPTION_ON); #endif # ifdef PNG_WRITE_SUPPORTED png_set_benign_errors(write_ptr, 1); # endif } #endif /* BENIGN_ERRORS */ pngtest_debug("Initializing input and output streams"); #ifdef PNG_STDIO_SUPPORTED png_init_io(read_ptr, fpin); # ifdef PNG_WRITE_SUPPORTED png_init_io(write_ptr, fpout); # endif #else png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data); # ifdef PNG_WRITE_SUPPORTED png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data, # ifdef PNG_WRITE_FLUSH_SUPPORTED pngtest_flush); # else NULL); # endif # endif #endif if (status_dots_requested == 1) { #ifdef PNG_WRITE_SUPPORTED png_set_write_status_fn(write_ptr, write_row_callback); #endif png_set_read_status_fn(read_ptr, read_row_callback); } else { #ifdef PNG_WRITE_SUPPORTED png_set_write_status_fn(write_ptr, NULL); #endif png_set_read_status_fn(read_ptr, NULL); } #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED png_set_read_user_transform_fn(read_ptr, read_user_callback); #endif #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED zero_samples = 0; png_set_write_user_transform_fn(write_ptr, count_zero_samples); #endif #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED /* Preserve all the unknown chunks, if possible. If this is disabled, then * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use * libpng to *save* the unknown chunks on read (because we can't switch the * save option on!) * * Notice that if SET_UNKNOWN_CHUNKS is *not* supported, the reader will * discard all unknown chunks, and the writer will write them all. */ #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0); #endif #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0); #endif #endif pngtest_debug("Reading info struct"); png_read_info(read_ptr, read_info_ptr); #ifdef PNG_READ_USER_CHUNKS_SUPPORTED /* This is a bit of a hack; there is no obvious way in the callback function * to determine that the chunks before the first IDAT have been read, so * remove the info_ptr (which is only used to determine position relative to * PLTE) here to indicate that we are after the IDAT. */ my_user_chunk_data.info_ptr = NULL; #endif pngtest_debug("Transferring info struct"); { int interlace_type, compression_type, filter_type; if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, &compression_type, &filter_type) != 0) { png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth, color_type, interlace_type, compression_type, filter_type); /* num_passes may not be available below if interlace support is not * provided by libpng for both read and write. */ switch (interlace_type) { case PNG_INTERLACE_NONE: num_passes = 1; break; case PNG_INTERLACE_ADAM7: num_passes = 7; break; default: png_error(read_ptr, "invalid interlace type"); /*NOT REACHED*/ } } else png_error(read_ptr, "png_get_IHDR failed"); } #ifdef PNG_FIXED_POINT_SUPPORTED #ifdef PNG_cHRM_SUPPORTED { png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0) { png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); } } #endif #ifdef PNG_gAMA_SUPPORTED { png_fixed_point gamma; if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma) != 0) png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma); } #endif #else /* Use floating point versions */ #ifdef PNG_FLOATING_POINT_SUPPORTED #ifdef PNG_cHRM_SUPPORTED { double white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0) { png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); } } #endif #ifdef PNG_gAMA_SUPPORTED { double gamma; if (png_get_gAMA(read_ptr, read_info_ptr, &gamma) != 0) png_set_gAMA(write_ptr, write_info_ptr, gamma); } #endif #endif /* Floating point */ #endif /* Fixed point */ #ifdef PNG_iCCP_SUPPORTED { png_charp name; png_bytep profile; png_uint_32 proflen; int compression_type; if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type, &profile, &proflen) != 0) { png_set_iCCP(write_ptr, write_info_ptr, name, compression_type, profile, proflen); } } #endif #ifdef PNG_sRGB_SUPPORTED { int intent; if (png_get_sRGB(read_ptr, read_info_ptr, &intent) != 0) png_set_sRGB(write_ptr, write_info_ptr, intent); } #endif { png_colorp palette; int num_palette; if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette) != 0) png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette); } #ifdef PNG_bKGD_SUPPORTED { png_color_16p background; if (png_get_bKGD(read_ptr, read_info_ptr, &background) != 0) png_set_bKGD(write_ptr, write_info_ptr, background); } #endif #ifdef PNG_READ_eXIf_SUPPORTED { png_bytep exif = NULL; png_uint_32 exif_length; if (png_get_eXIf_1(read_ptr, read_info_ptr, &exif_length, &exif) != 0) { if (exif_length > 1) fprintf(STDERR," eXIf type %c%c, %lu bytes\n",exif[0],exif[1], (unsigned long)exif_length); # ifdef PNG_WRITE_eXIf_SUPPORTED png_set_eXIf_1(write_ptr, write_info_ptr, exif_length, exif); # endif } } #endif #ifdef PNG_hIST_SUPPORTED { png_uint_16p hist; if (png_get_hIST(read_ptr, read_info_ptr, &hist) != 0) png_set_hIST(write_ptr, write_info_ptr, hist); } #endif #ifdef PNG_oFFs_SUPPORTED { png_int_32 offset_x, offset_y; int unit_type; if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y, &unit_type) != 0) png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type); } #endif #ifdef PNG_pCAL_SUPPORTED { png_charp purpose, units; png_charpp params; png_int_32 X0, X1; int type, nparams; if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type, &nparams, &units, &params) != 0) png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type, nparams, units, params); } #endif #ifdef PNG_pHYs_SUPPORTED { png_uint_32 res_x, res_y; int unit_type; if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type) != 0) png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type); } #endif #ifdef PNG_sBIT_SUPPORTED { png_color_8p sig_bit; if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit) != 0) png_set_sBIT(write_ptr, write_info_ptr, sig_bit); } #endif #ifdef PNG_sCAL_SUPPORTED #if defined(PNG_FLOATING_POINT_SUPPORTED) && \ defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) { int unit; double scal_width, scal_height; if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width, &scal_height) != 0) png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height); } #else #ifdef PNG_FIXED_POINT_SUPPORTED { int unit; png_charp scal_width, scal_height; if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width, &scal_height) != 0) { png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width, scal_height); } } #endif #endif #endif #ifdef PNG_sPLT_SUPPORTED { png_sPLT_tp entries; int num_entries = png_get_sPLT(read_ptr, read_info_ptr, &entries); if (num_entries != 0) png_set_sPLT(write_ptr, write_info_ptr, entries, num_entries); } #endif #ifdef PNG_TEXT_SUPPORTED { png_textp text_ptr; int num_text; if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0) { pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); pngtest_check_text_support(read_ptr, text_ptr, num_text); if (verbose != 0) { int i; fprintf(STDERR,"\n"); for (i = 0; i < num_text; i++) { fprintf(STDERR," Text compression[%d]=%d\n", i, text_ptr[i].compression); } } png_set_text(write_ptr, write_info_ptr, text_ptr, num_text); } } #endif #ifdef PNG_tIME_SUPPORTED { png_timep mod_time; if (png_get_tIME(read_ptr, read_info_ptr, &mod_time) != 0) { png_set_tIME(write_ptr, write_info_ptr, mod_time); #ifdef PNG_TIME_RFC1123_SUPPORTED if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0) tIME_string[(sizeof tIME_string) - 1] = '\0'; else { strncpy(tIME_string, "*** invalid time ***", (sizeof tIME_string)); tIME_string[(sizeof tIME_string) - 1] = '\0'; } tIME_chunk_present++; #endif /* TIME_RFC1123 */ } } #endif #ifdef PNG_tRNS_SUPPORTED { png_bytep trans_alpha; int num_trans; png_color_16p trans_color; if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans, &trans_color) != 0) { int sample_max = (1 << bit_depth); /* libpng doesn't reject a tRNS chunk with out-of-range samples */ if (!((color_type == PNG_COLOR_TYPE_GRAY && (int)trans_color->gray > sample_max) || (color_type == PNG_COLOR_TYPE_RGB && ((int)trans_color->red > sample_max || (int)trans_color->green > sample_max || (int)trans_color->blue > sample_max)))) png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans, trans_color); } } #endif #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED { png_unknown_chunkp unknowns; int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr, &unknowns); if (num_unknowns != 0) png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns, num_unknowns); } #endif #ifdef PNG_WRITE_SUPPORTED pngtest_debug("Writing info struct"); /* Write the info in two steps so that if we write the 'unknown' chunks here * they go to the correct place. */ png_write_info_before_PLTE(write_ptr, write_info_ptr); write_chunks(write_ptr, &my_user_chunk_data, before_PLTE); /* before PLTE */ png_write_info(write_ptr, write_info_ptr); write_chunks(write_ptr, &my_user_chunk_data, before_IDAT); /* after PLTE */ png_write_info(write_ptr, write_end_info_ptr); write_chunks(write_ptr, &my_user_chunk_data, after_IDAT); /* after IDAT */ #ifdef PNG_COMPRESSION_COMPAT /* Test the 'compatibility' setting here, if it is available. */ png_set_compression(write_ptr, PNG_COMPRESSION_COMPAT); #endif #endif pngtest_debug("Writing row data"); #if defined(PNG_READ_INTERLACING_SUPPORTED) &&\ defined(PNG_WRITE_INTERLACING_SUPPORTED) /* Both must be defined for libpng to be able to handle the interlace, * otherwise it gets handled below by simply reading and writing the passes * directly. */ if (png_set_interlace_handling(read_ptr) != num_passes) png_error(write_ptr, "png_set_interlace_handling(read): wrong pass count "); if (png_set_interlace_handling(write_ptr) != num_passes) png_error(write_ptr, "png_set_interlace_handling(write): wrong pass count "); #else /* png_set_interlace_handling not called on either read or write */ # define calc_pass_height #endif /* not using libpng interlace handling */ #ifdef PNGTEST_TIMING t_stop = (float)clock(); t_misc += (t_stop - t_start); t_start = t_stop; #endif for (pass = 0; pass < num_passes; pass++) { # ifdef calc_pass_height png_uint_32 pass_height; if (num_passes == 7) /* interlaced */ { if (PNG_PASS_COLS(width, pass) > 0) pass_height = PNG_PASS_ROWS(height, pass); else pass_height = 0; } else /* not interlaced */ pass_height = height; # else # define pass_height height # endif pngtest_debug1("Writing row data for pass %d", pass); for (y = 0; y < pass_height; y++) { pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y); row_buf = (png_bytep)png_malloc(read_ptr, png_get_rowbytes(read_ptr, read_info_ptr)); pngtest_debug2("\t%p (%lu bytes)", row_buf, (unsigned long)png_get_rowbytes(read_ptr, read_info_ptr)); png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1); #ifdef PNG_WRITE_SUPPORTED #ifdef PNGTEST_TIMING t_stop = (float)clock(); t_decode += (t_stop - t_start); t_start = t_stop; #endif png_write_rows(write_ptr, (png_bytepp)&row_buf, 1); #ifdef PNGTEST_TIMING t_stop = (float)clock(); t_encode += (t_stop - t_start); t_start = t_stop; #endif #endif /* WRITE */ pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y); png_free(read_ptr, row_buf); row_buf = NULL; } } #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED # ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1); # endif # ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1); # endif #endif pngtest_debug("Reading and writing end_info data"); png_read_end(read_ptr, end_info_ptr); #ifdef PNG_TEXT_SUPPORTED { png_textp text_ptr; int num_text; if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0) { pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); pngtest_check_text_support(read_ptr, text_ptr, num_text); if (verbose != 0) { int i; fprintf(STDERR,"\n"); for (i = 0; i < num_text; i++) { fprintf(STDERR," Text compression[%d]=%d\n", i, text_ptr[i].compression); } } png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text); } } #endif #ifdef PNG_READ_eXIf_SUPPORTED { png_bytep exif = NULL; png_uint_32 exif_length; if (png_get_eXIf_1(read_ptr, end_info_ptr, &exif_length, &exif) != 0) { if (exif_length > 1) fprintf(STDERR," eXIf type %c%c, %lu bytes\n",exif[0],exif[1], (unsigned long)exif_length); # ifdef PNG_WRITE_eXIf_SUPPORTED png_set_eXIf_1(write_ptr, write_end_info_ptr, exif_length, exif); # endif } } #endif #ifdef PNG_tIME_SUPPORTED { png_timep mod_time; if (png_get_tIME(read_ptr, end_info_ptr, &mod_time) != 0) { png_set_tIME(write_ptr, write_end_info_ptr, mod_time); #ifdef PNG_TIME_RFC1123_SUPPORTED if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0) tIME_string[(sizeof tIME_string) - 1] = '\0'; else { strncpy(tIME_string, "*** invalid time ***", sizeof tIME_string); tIME_string[(sizeof tIME_string)-1] = '\0'; } tIME_chunk_present++; #endif /* TIME_RFC1123 */ } } #endif #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED { png_unknown_chunkp unknowns; int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr, &unknowns); if (num_unknowns != 0) png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns, num_unknowns); } #endif #ifdef PNG_WRITE_SUPPORTED #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED /* Normally one would use Z_DEFAULT_STRATEGY for text compression. * This is here just to make pngtest replicate the results from libpng * versions prior to 1.5.4, and to test this new API. */ png_set_text_compression_strategy(write_ptr, Z_FILTERED); #endif /* When the unknown vpAg/sTER chunks are written by pngtest the only way to * do it is to write them *before* calling png_write_end. When unknown * chunks are written by libpng, however, they are written just before IEND. * There seems to be no way round this, however vpAg/sTER are not expected * after IDAT. */ write_chunks(write_ptr, &my_user_chunk_data, after_IDAT); png_write_end(write_ptr, write_end_info_ptr); #endif #ifdef PNG_EASY_ACCESS_SUPPORTED if (verbose != 0) { png_uint_32 iwidth, iheight; iwidth = png_get_image_width(write_ptr, write_info_ptr); iheight = png_get_image_height(write_ptr, write_info_ptr); fprintf(STDERR, "\n Image width = %lu, height = %lu\n", (unsigned long)iwidth, (unsigned long)iheight); } #endif pngtest_debug("Destroying data structs"); pngtest_debug("Destroying read_ptr, read_info_ptr, end_info_ptr"); png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); #ifdef PNG_WRITE_SUPPORTED pngtest_debug("Destroying write_end_info_ptr"); png_destroy_info_struct(write_ptr, &write_end_info_ptr); pngtest_debug("Destroying write_ptr, write_info_ptr"); png_destroy_write_struct(&write_ptr, &write_info_ptr); #endif pngtest_debug("Destruction complete."); fclose(fpin); fclose(fpout); /* Summarize any warnings or errors and in 'strict' mode fail the test. * Unsupported chunks can result in warnings, in that case ignore the strict * setting, otherwise fail the test on warnings as well as errors. */ if (error_count > 0) { /* We don't really expect to get here because of the setjmp handling * above, but this is safe. */ fprintf(STDERR, "\n %s: %d libpng errors found (%d warnings)", inname, error_count, warning_count); if (strict != 0) return 1; } # ifdef PNG_WRITE_SUPPORTED /* If there is no write support nothing was written! */ else if (unsupported_chunks > 0) { fprintf(STDERR, "\n %s: unsupported chunks (%d)%s", inname, unsupported_chunks, strict ? ": IGNORED --strict!" : ""); } # endif else if (warning_count > 0) { fprintf(STDERR, "\n %s: %d libpng warnings found", inname, warning_count); if (strict != 0) return 1; } pngtest_debug("Opening files for comparison"); if ((fpin = fopen(inname, "rb")) == NULL) { fprintf(STDERR, "Could not find file %s\n", inname); return 1; } if ((fpout = fopen(outname, "rb")) == NULL) { fprintf(STDERR, "Could not find file %s\n", outname); fclose(fpin); return 1; } #if defined (PNG_WRITE_SUPPORTED) /* else nothing was written */ &&\ defined (PNG_WRITE_FILTER_SUPPORTED) if (interlace_preserved != 0) /* else the files will be changed */ { for (;;) { static int wrote_question = 0; size_t num_in, num_out; char inbuf[256], outbuf[256]; num_in = fread(inbuf, 1, sizeof inbuf, fpin); num_out = fread(outbuf, 1, sizeof outbuf, fpout); if (num_in != num_out) { fprintf(STDERR, "\nFiles %s and %s are of a different size\n", inname, outname); if (wrote_question == 0 && unsupported_chunks == 0) { fprintf(STDERR, " Was %s written with the same maximum IDAT" " chunk size (%d bytes),", inname, PNG_ZBUF_SIZE); fprintf(STDERR, "\n filtering heuristic (libpng default), compression"); fprintf(STDERR, " level (zlib default),\n and zlib version (%s)?\n\n", ZLIB_VERSION); wrote_question = 1; } fclose(fpin); fclose(fpout); if (strict != 0 && unsupported_chunks == 0) return 1; else return 0; } if (num_in == 0) break; if (memcmp(inbuf, outbuf, num_in)) { fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname); if (wrote_question == 0 && unsupported_chunks == 0) { fprintf(STDERR, " Was %s written with the same maximum" " IDAT chunk size (%d bytes),", inname, PNG_ZBUF_SIZE); fprintf(STDERR, "\n filtering heuristic (libpng default), compression"); fprintf(STDERR, " level (zlib default),\n and zlib version (%s)?\n\n", ZLIB_VERSION); wrote_question = 1; } fclose(fpin); fclose(fpout); /* NOTE: the unsupported_chunks escape is permitted here because * unsupported text chunk compression will result in the compression * mode being changed (to NONE) yet, in the test case, the result * can be exactly the same size! */ if (strict != 0 && unsupported_chunks == 0) return 1; else return 0; } } } #endif /* WRITE && WRITE_FILTER */ fclose(fpin); fclose(fpout); return 0; } /* Input and output filenames */ #ifdef RISCOS static const char *inname = "pngtest/png"; static const char *outname = "pngout/png"; #else static const char *inname = "pngtest.png"; static const char *outname = "pngout.png"; #endif int main(int argc, char *argv[]) { int multiple = 0; int ierror = 0; png_structp dummy_ptr; fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING); fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION); fprintf(STDERR, "%s", png_get_copyright(NULL)); /* Show the version of libpng used in building the library */ fprintf(STDERR, " library (%lu):%s", (unsigned long)png_access_version_number(), png_get_header_version(NULL)); /* Show the version of libpng used in building the application */ fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER, PNG_HEADER_VERSION_STRING); /* Do some consistency checking on the memory allocation settings, I'm * not sure this matters, but it is nice to know, the first of these * tests should be impossible because of the way the macros are set * in pngconf.h */ #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n"); #endif /* I think the following can happen. */ #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K) fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n"); #endif if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING) != 0) { fprintf(STDERR, "Warning: mismatching versions of png.h and png.c\n"); fprintf(STDERR, " png.h version string: %s\n", PNG_LIBPNG_VER_STRING); fprintf(STDERR, " png.c version string: %s\n\n", png_libpng_ver); ++ierror; } if (argc > 1) { if (strcmp(argv[1], "-m") == 0) { multiple = 1; status_dots_requested = 0; } else if (strcmp(argv[1], "-mv") == 0 || strcmp(argv[1], "-vm") == 0 ) { multiple = 1; verbose = 1; status_dots_requested = 1; } else if (strcmp(argv[1], "-v") == 0) { verbose = 1; status_dots_requested = 1; inname = argv[2]; } else if (strcmp(argv[1], "--strict") == 0) { status_dots_requested = 0; verbose = 1; inname = argv[2]; strict++; relaxed = 0; multiple = 1; } else if (strcmp(argv[1], "--relaxed") == 0) { status_dots_requested = 0; verbose = 1; inname = argv[2]; strict = 0; relaxed++; multiple = 1; } else if (strcmp(argv[1], "--xfail") == 0) { status_dots_requested = 0; verbose = 1; inname = argv[2]; strict = 0; xfail++; relaxed++; multiple = 1; } else { inname = argv[1]; status_dots_requested = 0; } } if (multiple == 0 && argc == 3 + verbose) outname = argv[2 + verbose]; if ((multiple == 0 && argc > 3 + verbose) || (multiple != 0 && argc < 2)) { fprintf(STDERR, "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n", argv[0], argv[0]); fprintf(STDERR, " reads/writes one PNG file (without -m) or multiple files (-m)\n"); fprintf(STDERR, " with -m %s is used as a temporary file\n", outname); exit(1); } if (multiple != 0) { int i; #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG int allocation_now = current_allocation; #endif for (i = 2; i < argc; ++i) { int kerror; fprintf(STDERR, "\n Testing %s:", argv[i]); #if PNG_DEBUG > 0 fprintf(STDERR, "\n"); #endif kerror = test_one_file(argv[i], outname); if (kerror == 0) { #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED fprintf(STDERR, "\n PASS (%lu zero samples)\n", (unsigned long)zero_samples); #else fprintf(STDERR, " PASS\n"); #endif #ifdef PNG_TIME_RFC1123_SUPPORTED if (tIME_chunk_present != 0) fprintf(STDERR, " tIME = %s\n", tIME_string); tIME_chunk_present = 0; #endif /* TIME_RFC1123 */ } else { if (xfail) fprintf(STDERR, " XFAIL\n"); else { fprintf(STDERR, " FAIL\n"); ierror += kerror; } } #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG if (allocation_now != current_allocation) fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", current_allocation - allocation_now); if (current_allocation != 0) { memory_infop pinfo = pinformation; fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", current_allocation); while (pinfo != NULL) { fprintf(STDERR, " %lu bytes at %p\n", (unsigned long)pinfo->size, pinfo->pointer); pinfo = pinfo->next; } } #endif } #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG fprintf(STDERR, " Current memory allocation: %10d bytes\n", current_allocation); fprintf(STDERR, " Maximum memory allocation: %10d bytes\n", maximum_allocation); fprintf(STDERR, " Total memory allocation: %10d bytes\n", total_allocation); fprintf(STDERR, " Number of allocations: %10d\n", num_allocations); #endif } else { int i; for (i = 0; i < 3; ++i) { int kerror; #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG int allocation_now = current_allocation; #endif if (i == 1) status_dots_requested = 1; else if (verbose == 0) status_dots_requested = 0; if (i == 0 || verbose == 1 || ierror != 0) { fprintf(STDERR, "\n Testing %s:", inname); #if PNG_DEBUG > 0 fprintf(STDERR, "\n"); #endif } kerror = test_one_file(inname, outname); if (kerror == 0) { if (verbose == 1 || i == 2) { #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED fprintf(STDERR, "\n PASS (%lu zero samples)\n", (unsigned long)zero_samples); #else fprintf(STDERR, " PASS\n"); #endif #ifdef PNG_TIME_RFC1123_SUPPORTED if (tIME_chunk_present != 0) fprintf(STDERR, " tIME = %s\n", tIME_string); #endif /* TIME_RFC1123 */ } } else { if (verbose == 0 && i != 2) { fprintf(STDERR, "\n Testing %s:", inname); #if PNG_DEBUG > 0 fprintf(STDERR, "\n"); #endif } if (xfail) fprintf(STDERR, " XFAIL\n"); else { fprintf(STDERR, " FAIL\n"); ierror += kerror; } } #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG if (allocation_now != current_allocation) fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", current_allocation - allocation_now); if (current_allocation != 0) { memory_infop pinfo = pinformation; fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", current_allocation); while (pinfo != NULL) { fprintf(STDERR, " %lu bytes at %p\n", (unsigned long)pinfo->size, pinfo->pointer); pinfo = pinfo->next; } } #endif } #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG fprintf(STDERR, " Current memory allocation: %10d bytes\n", current_allocation); fprintf(STDERR, " Maximum memory allocation: %10d bytes\n", maximum_allocation); fprintf(STDERR, " Total memory allocation: %10d bytes\n", total_allocation); fprintf(STDERR, " Number of allocations: %10d\n", num_allocations); #endif } #ifdef PNGTEST_TIMING t_stop = (float)clock(); t_misc += (t_stop - t_start); t_start = t_stop; fprintf(STDERR, " CPU time used = %.3f seconds", (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC); fprintf(STDERR, " (decoding %.3f,\n", t_decode/(float)CLOCKS_PER_SEC); fprintf(STDERR, " encoding %.3f ,", t_encode/(float)CLOCKS_PER_SEC); fprintf(STDERR, " other %.3f seconds)\n\n", t_misc/(float)CLOCKS_PER_SEC); #endif if (ierror == 0) fprintf(STDERR, " libpng passes test\n"); else fprintf(STDERR, " libpng FAILS test\n"); dummy_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); fprintf(STDERR, " Default limits:\n"); fprintf(STDERR, " width_max = %lu\n", (unsigned long) png_get_user_width_max(dummy_ptr)); fprintf(STDERR, " height_max = %lu\n", (unsigned long) png_get_user_height_max(dummy_ptr)); if (png_get_chunk_cache_max(dummy_ptr) == 0) fprintf(STDERR, " cache_max = unlimited\n"); else fprintf(STDERR, " cache_max = %lu\n", (unsigned long) png_get_chunk_cache_max(dummy_ptr)); if (png_get_chunk_malloc_max(dummy_ptr) == 0) fprintf(STDERR, " malloc_max = unlimited\n"); else fprintf(STDERR, " malloc_max = %lu\n", (unsigned long) png_get_chunk_malloc_max(dummy_ptr)); png_destroy_read_struct(&dummy_ptr, NULL, NULL); return (ierror != 0); } #else int main(void) { fprintf(STDERR, " test ignored because libpng was not built with read support\n"); /* And skip this test */ return SKIP; } #endif

---

docroot: /var/www/469ed2f6-4d4b-4a8a-9f5e-ee4ef04d3bc8/public_html

---

curdir: /usr/share/doc/libpng-dev/examples

	.		4096
	..		4096
X	example.c		40376
X	pngtest.c		62485
X	pngtest.png		4452