/* pngtest.c - a simple test program to test libpng * * Last changed in libpng 1.5.0 [October 8, 2010] * Copyright (c) 1998-2010 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 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 ..." */ #include "zlib.h" #include "png.h" /* Copied from pngpriv.h but only used in error messages below. */ #ifndef PNG_ZBUF_SIZE # define PNG_ZBUF_SIZE 8192 #endif # include # include # include # define FCLOSE(file) fclose(file) #ifndef PNG_STDIO_SUPPORTED typedef FILE * png_FILE_p; #endif /* Makes pngtest verbose so we can find problems. */ #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)) #else # define pngtest_debug(m) ((void)0) # define pngtest_debug1(m,p1) ((void)0) # define pngtest_debug2(m,p1,p2) ((void)0) #endif #if !PNG_DEBUG # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */ #endif /* The code uses memcmp and memcpy on large objects (typically row pointers) so * it is necessary to do soemthing special on certain architectures, note that * the actual support for this was effectively removed in 1.4, so only the * memory remains in this program: */ #define CVT_PTR(ptr) (ptr) #define CVT_PTR_NOCHECK(ptr) (ptr) #define png_memcmp memcmp #define png_memcpy memcpy #define png_memset memset /* 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 #endif #ifdef PNG_TIME_RFC1123_SUPPORTED #define PNG_tIME_STRING_LENGTH 29 static int tIME_chunk_present = 0; static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present"; #endif static int verbose = 0; int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname)); #ifdef __TURBOC__ #include #endif /* Defined so I can write to a file on gui/windowing platforms */ /* #define STDERR stderr */ #define STDERR stdout /* For DOS */ /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ #ifndef png_jmpbuf # define png_jmpbuf(png_ptr) png_ptr->jmpbuf #endif /* 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; void PNGCBAPI read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); void PNGCBAPI read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { if (png_ptr == NULL || row_number > PNG_UINT_31_MAX) return; 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"); } void PNGCBAPI write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass); void PNGCBAPI write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) { if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) return; fprintf(stdout, "w"); } #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED /* Example of using user transform callback (we don't transform anything, * but merely examine the row filters. We set this to 256 rather than * 5 in case illegal filter values are present.) */ static png_uint_32 filters_used[256]; void PNGCBAPI count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data); void PNGCBAPI count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data) { if (png_ptr != NULL && row_info != NULL) ++filters_used[*(data - 1)]; } #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; void PNGCBAPI count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data); void PNGCBAPI count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) { png_bytep dp = data; if (png_ptr == NULL) return; /* 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; nbit_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; nbit_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 /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */ static int wrote_question = 0; #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. */ #ifndef USE_FAR_KEYWORD static void PNGCBAPI pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check = 0; png_voidp io_ptr; /* fread() returns 0 on error, so it is OK to store this in a png_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!"); } } #else /* This is the model-independent version. Since the standard I/O library can't handle far buffers in the medium and small models, we have to copy the data. */ #define NEAR_BUF_SIZE 1024 #define MIN(a,b) (a <= b ? a : b) static void PNGCBAPI pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; png_byte *n_data; png_FILE_p io_ptr; /* Check if data really is near. If so, use usual code. */ n_data = (png_byte *)CVT_PTR_NOCHECK(data); io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr)); if ((png_bytep)n_data == data) { check = fread(n_data, 1, length, io_ptr); } else { png_byte buf[NEAR_BUF_SIZE]; png_size_t read, remaining, err; check = 0; remaining = length; do { read = MIN(NEAR_BUF_SIZE, remaining); err = fread(buf, 1, 1, io_ptr); png_memcpy(data, buf, read); /* Copy far buffer to near buffer */ if (err != read) break; else check += err; data += read; remaining -= read; } while (remaining != 0); } if (check != length) png_error(png_ptr, "read Error"); } #endif /* USE_FAR_KEYWORD */ #ifdef PNG_WRITE_FLUSH_SUPPORTED static void PNGCBAPI pngtest_flush(png_structp png_ptr) { /* Do nothing; fflush() is said to be just a waste of energy. */ png_ptr = png_ptr; /* Stifle compiler warning */ } #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. */ #ifndef USE_FAR_KEYWORD static void PNGCBAPI pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr)); if (check != length) { png_error(png_ptr, "Write Error"); } } #else /* This is the model-independent version. Since the standard I/O library can't handle far buffers in the medium and small models, we have to copy the data. */ #define NEAR_BUF_SIZE 1024 #define MIN(a,b) (a <= b ? a : b) static void PNGCBAPI pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { png_size_t check; png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ png_FILE_p io_ptr; /* Check if data really is near. If so, use usual code. */ near_data = (png_byte *)CVT_PTR_NOCHECK(data); io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr)); if ((png_bytep)near_data == data) { check = fwrite(near_data, 1, length, io_ptr); } else { png_byte buf[NEAR_BUF_SIZE]; png_size_t written, remaining, err; check = 0; remaining = length; do { written = MIN(NEAR_BUF_SIZE, remaining); png_memcpy(buf, data, written); /* Copy far buffer to near buffer */ err = fwrite(buf, 1, written, io_ptr); if (err != written) break; else check += err; data += written; remaining -= written; } while (remaining != 0); } if (check != length) { png_error(png_ptr, "Write Error"); } } #endif /* USE_FAR_KEYWORD */ /* 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. */ static void PNGCBAPI pngtest_warning(png_structp png_ptr, png_const_charp message) { PNG_CONST char *name = "UNKNOWN (ERROR!)"; char *test; test = png_get_error_ptr(png_ptr); if (test == NULL) fprintf(STDERR, "%s: libpng warning: %s\n", name, message); else fprintf(STDERR, "%s: libpng warning: %s\n", test, 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) { pngtest_warning(png_ptr, message); /* We can return because png_error calls the default handler, which is * actually OK in this case. */ } #endif /* !PNG_STDIO_SUPPORTED */ /* 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 then 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 FAR *next; } memory_information; typedef memory_information FAR *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, png_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. */ png_memset(pinfo->pointer, 0xdd, pinfo->size); if (verbose) 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. */ { memory_infop FAR *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. */ png_memset(ptr, 0x55, pinfo->size); png_free_default(png_ptr, pinfo); pinfo = NULL; break; } if (pinfo->next == NULL) { fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr); break; } ppinfo = &pinfo->next; } } /* Finally free the data. */ if (verbose) printf("Freeing %p\n", ptr); png_free_default(png_ptr, ptr); ptr = NULL; } #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */ /* END of code to test memory allocation/deallocation */ /* Demonstration of user chunk support of the sTER and vpAg chunks */ #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED /* (sTER is a public chunk not yet known by libpng. vpAg is a private chunk used in ImageMagick to store "virtual page" size). */ static png_uint_32 user_chunk_data[4]; /* 0: sTER mode + 1 * 1: vpAg width * 2: vpAg height * 3: vpAg units */ static int PNGCBAPI read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk) { png_uint_32 *my_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; * png_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 */ my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr); my_user_chunk_data[0]=chunk->data[0]+1; return (1); } 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 */ my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr); my_user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data); my_user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4); my_user_chunk_data[3]=(png_uint_32)chunk->data[8]; return (1); } #endif /* END of code to demonstrate user chunk support */ /* Test one file */ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) { static png_FILE_p fpin; static png_FILE_p fpout; /* "static" prevents setjmp corruption */ 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; #else png_structp write_ptr = NULL; png_infop write_info_ptr = NULL; png_infop write_end_info_ptr = NULL; #endif png_bytep row_buf; png_uint_32 y; png_uint_32 width, height; int num_pass, pass; int bit_depth, color_type; #ifdef PNG_SETJMP_SUPPORTED #ifdef USE_FAR_KEYWORD jmp_buf png_jmpbuf; #endif #endif char inbuf[256], outbuf[256]; row_buf = NULL; 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 #ifndef PNG_STDIO_SUPPORTED png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error, pngtest_warning); #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED user_chunk_data[0] = 0; user_chunk_data[1] = 0; user_chunk_data[2] = 0; user_chunk_data[3] = 0; png_set_read_user_chunk_fn(read_ptr, user_chunk_data, read_user_chunk_callback); #endif #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 #ifndef PNG_STDIO_SUPPORTED png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error, pngtest_warning); #endif #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_SETJMP_SUPPORTED pngtest_debug("Setting jmpbuf for read struct"); #ifdef USE_FAR_KEYWORD if (setjmp(png_jmpbuf)) #else if (setjmp(png_jmpbuf(read_ptr))) #endif { fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname); png_free(read_ptr, row_buf); row_buf = NULL; png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); #ifdef PNG_WRITE_SUPPORTED 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 USE_FAR_KEYWORD png_memcpy(png_jmpbuf(read_ptr), png_jmpbuf, png_sizeof(jmp_buf)); #endif #ifdef PNG_WRITE_SUPPORTED pngtest_debug("Setting jmpbuf for write struct"); #ifdef USE_FAR_KEYWORD if (setjmp(png_jmpbuf)) #else if (setjmp(png_jmpbuf(write_ptr))) #endif { fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname); png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); png_destroy_info_struct(write_ptr, &write_end_info_ptr); #ifdef PNG_WRITE_SUPPORTED png_destroy_write_struct(&write_ptr, &write_info_ptr); #endif FCLOSE(fpin); FCLOSE(fpout); return (1); } #ifdef USE_FAR_KEYWORD png_memcpy(png_jmpbuf(write_ptr), png_jmpbuf, png_sizeof(jmp_buf)); #endif #endif #endif 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 { int i; for (i = 0; i<256; i++) filters_used[i] = 0; png_set_read_user_transform_fn(read_ptr, count_filters); } #endif #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED zero_samples = 0; png_set_write_user_transform_fn(write_ptr, count_zero_samples); #endif #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED # ifndef PNG_HANDLE_CHUNK_ALWAYS # define PNG_HANDLE_CHUNK_ALWAYS 3 # endif png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0); #endif #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED # ifndef PNG_HANDLE_CHUNK_IF_SAFE # define PNG_HANDLE_CHUNK_IF_SAFE 2 # endif png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_IF_SAFE, NULL, 0); #endif pngtest_debug("Reading info struct"); png_read_info(read_ptr, read_info_ptr); 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)) { png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth, #ifdef PNG_WRITE_INTERLACING_SUPPORTED color_type, interlace_type, compression_type, filter_type); #else color_type, PNG_INTERLACE_NONE, compression_type, filter_type); #endif } } #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)) { 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)) 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)) { 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)) 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)) { 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)) 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)) 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)) { png_set_bKGD(write_ptr, write_info_ptr, background); } } #endif #ifdef PNG_hIST_SUPPORTED { png_uint_16p hist; if (png_get_hIST(read_ptr, read_info_ptr, &hist)) 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)) { 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, ¶ms)) { 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)) 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)) png_set_sBIT(write_ptr, write_info_ptr, sig_bit); } #endif #ifdef PNG_sCAL_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED { int unit; double scal_width, scal_height; if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width, &scal_height)) { 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)) { png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width, scal_height); } } #endif #endif #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); 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)) { png_set_tIME(write_ptr, write_info_ptr, mod_time); #ifdef PNG_TIME_RFC1123_SUPPORTED /* We have to use png_memcpy instead of "=" because the string * pointed to by png_convert_to_rfc1123() gets free'ed before * we use it. */ png_memcpy(tIME_string, png_convert_to_rfc1123(read_ptr, mod_time), png_sizeof(tIME_string)); tIME_string[png_sizeof(tIME_string) - 1] = '\0'; tIME_chunk_present++; #endif /* PNG_TIME_RFC1123_SUPPORTED */ } } #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)) { 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) { int i; png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns, num_unknowns); /* Copy the locations from the read_info_ptr. The automatically * generated locations in write_info_ptr are wrong because we * haven't written anything yet. */ for (i = 0; i < num_unknowns; i++) png_set_unknown_chunk_location(write_ptr, write_info_ptr, i, unknowns[i].location); } } #endif #ifdef PNG_WRITE_SUPPORTED pngtest_debug("Writing info struct"); /* If we wanted, we could write info in two steps: * png_write_info_before_PLTE(write_ptr, write_info_ptr); */ png_write_info(write_ptr, write_info_ptr); #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED if (user_chunk_data[0] != 0) { png_byte png_sTER[5] = {115, 84, 69, 82, '\0'}; unsigned char ster_chunk_data[1]; if (verbose) fprintf(STDERR, "\n stereo mode = %lu\n", (unsigned long)(user_chunk_data[0] - 1)); ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1); png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1); } if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0) { png_byte png_vpAg[5] = {118, 112, 65, 103, '\0'}; unsigned char vpag_chunk_data[9]; if (verbose) fprintf(STDERR, " vpAg = %lu x %lu, units = %lu\n", (unsigned long)user_chunk_data[1], (unsigned long)user_chunk_data[2], (unsigned long)user_chunk_data[3]); png_save_uint_32(vpag_chunk_data, user_chunk_data[1]); png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]); vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff); png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9); } #endif #endif #ifdef SINGLE_ROWBUF_ALLOC pngtest_debug("Allocating row buffer..."); row_buf = (png_bytep)png_malloc(read_ptr, png_get_rowbytes(read_ptr, read_info_ptr)); pngtest_debug1("\t0x%08lx", (unsigned long)row_buf); #endif /* SINGLE_ROWBUF_ALLOC */ pngtest_debug("Writing row data"); #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ defined(PNG_WRITE_INTERLACING_SUPPORTED) num_pass = png_set_interlace_handling(read_ptr); # ifdef PNG_WRITE_SUPPORTED png_set_interlace_handling(write_ptr); # endif #else num_pass = 1; #endif #ifdef PNGTEST_TIMING t_stop = (float)clock(); t_misc += (t_stop - t_start); t_start = t_stop; #endif for (pass = 0; pass < num_pass; pass++) { pngtest_debug1("Writing row data for pass %d", pass); for (y = 0; y < height; y++) { #ifndef SINGLE_ROWBUF_ALLOC 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("\t0x%08lx (%u bytes)", (unsigned long)row_buf, png_get_rowbytes(read_ptr, read_info_ptr)); #endif /* !SINGLE_ROWBUF_ALLOC */ 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 /* PNG_WRITE_SUPPORTED */ #ifndef SINGLE_ROWBUF_ALLOC pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y); png_free(read_ptr, row_buf); row_buf = NULL; #endif /* !SINGLE_ROWBUF_ALLOC */ } } #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 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); png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text); } } #endif #ifdef PNG_tIME_SUPPORTED { png_timep mod_time; if (png_get_tIME(read_ptr, end_info_ptr, &mod_time)) { png_set_tIME(write_ptr, write_end_info_ptr, mod_time); #ifdef PNG_TIME_RFC1123_SUPPORTED /* We have to use png_memcpy instead of "=" because the string pointed to by png_convert_to_rfc1123() gets free'ed before we use it */ png_memcpy(tIME_string, png_convert_to_rfc1123(read_ptr, mod_time), png_sizeof(tIME_string)); tIME_string[png_sizeof(tIME_string) - 1] = '\0'; tIME_chunk_present++; #endif /* PNG_TIME_RFC1123_SUPPORTED */ } } #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) { int i; png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns, num_unknowns); /* Copy the locations from the read_info_ptr. The automatically * generated locations in write_end_info_ptr are wrong because we * haven't written the end_info yet. */ for (i = 0; i < num_unknowns; i++) png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i, unknowns[i].location); } } #endif #ifdef PNG_WRITE_SUPPORTED png_write_end(write_ptr, write_end_info_ptr); #endif #ifdef PNG_EASY_ACCESS_SUPPORTED if (verbose) { 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"); #ifdef SINGLE_ROWBUF_ALLOC pngtest_debug("destroying row_buf for read_ptr"); png_free(read_ptr, row_buf); row_buf = NULL; #endif /* SINGLE_ROWBUF_ALLOC */ 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); 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); } for (;;) { png_size_t num_in, num_out; num_in = fread(inbuf, 1, 1, fpin); num_out = fread(outbuf, 1, 1, fpout); if (num_in != num_out) { fprintf(STDERR, "\nFiles %s and %s are of a different size\n", inname, outname); if (wrote_question == 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); return (0); } if (!num_in) break; if (png_memcmp(inbuf, outbuf, num_in)) { fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname); if (wrote_question == 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); return (0); } } FCLOSE(fpin); FCLOSE(fpout); return (0); } /* Input and output filenames */ #ifdef RISCOS static PNG_CONST char *inname = "pngtest/png"; static PNG_CONST char *outname = "pngout/png"; #else static PNG_CONST char *inname = "pngtest.png"; static PNG_CONST char *outname = "pngout.png"; #endif int main(int argc, char *argv[]) { int multiple = 0; int ierror = 0; 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)) { fprintf(STDERR, "Warning: versions are different between png.h and png.c\n"); fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING); fprintf(STDERR, " png.c version: %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 { inname = argv[1]; status_dots_requested = 0; } } if (!multiple && argc == 3 + verbose) outname = argv[2 + verbose]; if ((!multiple && argc > 3 + verbose) || (multiple && 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) { int i; #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG int allocation_now = current_allocation; #endif for (i=2; isize, (unsigned int) 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); kerror = test_one_file(inname, outname); if (kerror == 0) { if (verbose == 1 || i == 2) { #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED int k; #endif #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_READ_USER_TRANSFORM_SUPPORTED for (k = 0; k<256; k++) if (filters_used[k]) fprintf(STDERR, " Filter %d was used %lu times\n", k, (unsigned long)filters_used[k]); #endif #ifdef PNG_TIME_RFC1123_SUPPORTED if (tIME_chunk_present != 0) fprintf(STDERR, " tIME = %s\n", tIME_string); #endif /* PNG_TIME_RFC1123_SUPPORTED */ } } else { if (verbose == 0 && i != 2) fprintf(STDERR, "\n Testing %s:", inname); 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 %x\n", (unsigned long)pinfo->size, (unsigned int)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"); return (int)(ierror != 0); } /* Generate a compiler error if there is an old png.h in the search path. */ typedef version_1_5_0beta50 your_png_h_is_not_version_1_5_0beta50;