2 /* pngtest.c - a simple test program to test libpng
4 * Last changed in libpng 1.2.27 - [April 29, 2008]
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2008 Glenn Randers-Pehrson
7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
10 * This program reads in a PNG image, writes it out again, and then
11 * compares the two files. If the files are identical, this shows that
12 * the basic chunk handling, filtering, and (de)compression code is working
13 * properly. It does not currently test all of the transforms, although
16 * The program will report "FAIL" in certain legitimate cases:
17 * 1) when the compression level or filter selection method is changed.
18 * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192.
19 * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks
20 * exist in the input file.
21 * 4) others not listed here...
22 * In these cases, it is best to check with another tool such as "pngcheck"
23 * to see what the differences between the two files are.
25 * If a filename is given on the command-line, then this file is used
26 * for the input, rather than the default "pngtest.png". This allows
27 * testing a wide variety of files easily. You can also test a number
28 * of files at once by typing "pngtest -m file1.png file2.png ..."
33 #if defined(_WIN32_WCE)
35 __error__ (f|w)printf functions are not supported on old WindowsCE.;
39 # define READFILE(file, data, length, check) \
40 if (ReadFile(file, data, length, &check,NULL)) check = 0
41 # define WRITEFILE(file, data, length, check)) \
42 if (WriteFile(file, data, length, &check, NULL)) check = 0
43 # define FCLOSE(file) CloseHandle(file)
47 # define READFILE(file, data, length, check) \
48 check=(png_size_t)fread(data,(png_size_t)1,length,file)
49 # define WRITEFILE(file, data, length, check) \
50 check=(png_size_t)fwrite(data,(png_size_t)1, length, file)
51 # define FCLOSE(file) fclose(file)
54 #if defined(PNG_NO_STDIO)
55 # if defined(_WIN32_WCE)
56 typedef HANDLE png_FILE_p;
58 typedef FILE * png_FILE_p;
62 /* Makes pngtest verbose so we can find problems (needs to be before png.h) */
68 # define SINGLE_ROWBUF_ALLOC /* makes buffer overruns easier to nail */
72 #define PNGTEST_TIMING
75 #ifdef PNG_NO_FLOATING_POINT_SUPPORTED
80 static float t_start, t_stop, t_decode, t_encode, t_misc;
84 #if defined(PNG_TIME_RFC1123_SUPPORTED)
85 #define PNG_tIME_STRING_LENGTH 30
86 static int tIME_chunk_present=0;
87 static char tIME_string[PNG_tIME_STRING_LENGTH] = "no tIME chunk present in file";
90 static int verbose = 0;
92 int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
98 /* defined so I can write to a file on gui/windowing platforms */
99 /* #define STDERR stderr */
100 #define STDERR stdout /* for DOS */
102 /* example of using row callbacks to make a simple progress meter */
103 static int status_pass=1;
104 static int status_dots_requested=0;
105 static int status_dots=1;
107 /* In case a system header (e.g., on AIX) defined jmpbuf */
112 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
114 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
121 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
126 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
128 if(png_ptr == NULL || row_number > PNG_UINT_31_MAX) return;
129 if(status_pass != pass)
131 fprintf(stdout,"\n Pass %d: ",pass);
138 fprintf(stdout, "\n ");
141 fprintf(stdout, "r");
148 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
153 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
155 if(png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) return;
156 fprintf(stdout, "w");
160 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
161 /* Example of using user transform callback (we don't transform anything,
162 but merely examine the row filters. We set this to 256 rather than
163 5 in case illegal filter values are present.) */
164 static png_uint_32 filters_used[256];
169 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data);
174 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
176 if(png_ptr != NULL && row_info != NULL)
177 ++filters_used[*(data-1)];
181 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
182 /* example of using user transform callback (we don't transform anything,
183 but merely count the zero samples) */
185 static png_uint_32 zero_samples;
191 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data);
196 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
199 if(png_ptr == NULL)return;
201 /* contents of row_info:
202 * png_uint_32 width width of row
203 * png_uint_32 rowbytes number of bytes in row
204 * png_byte color_type color type of pixels
205 * png_byte bit_depth bit depth of samples
206 * png_byte channels number of channels (1-4)
207 * png_byte pixel_depth bits per pixel (depth*channels)
211 /* counts the number of zero samples (or zero pixels if color_type is 3 */
213 if(row_info->color_type == 0 || row_info->color_type == 3)
216 png_uint_32 n, nstop;
217 for (n=0, nstop=row_info->width; n<nstop; n++)
219 if(row_info->bit_depth == 1)
221 if(((*dp << pos++ ) & 0x80) == 0) zero_samples++;
228 if(row_info->bit_depth == 2)
230 if(((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++;
237 if(row_info->bit_depth == 4)
239 if(((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++;
246 if(row_info->bit_depth == 8)
247 if(*dp++ == 0) zero_samples++;
248 if(row_info->bit_depth == 16)
250 if((*dp | *(dp+1)) == 0) zero_samples++;
255 else /* other color types */
257 png_uint_32 n, nstop;
259 int color_channels = row_info->channels;
260 if(row_info->color_type > 3)color_channels--;
262 for (n=0, nstop=row_info->width; n<nstop; n++)
264 for (channel = 0; channel < color_channels; channel++)
266 if(row_info->bit_depth == 8)
267 if(*dp++ == 0) zero_samples++;
268 if(row_info->bit_depth == 16)
270 if((*dp | *(dp+1)) == 0) zero_samples++;
274 if(row_info->color_type > 3)
277 if(row_info->bit_depth == 16)dp++;
282 #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
284 static int wrote_question = 0;
286 #if defined(PNG_NO_STDIO)
287 /* START of code to validate stdio-free compilation */
288 /* These copies of the default read/write functions come from pngrio.c and */
289 /* pngwio.c. They allow "don't include stdio" testing of the library. */
290 /* This is the function that does the actual reading of data. If you are
291 not reading from a standard C stream, you should create a replacement
292 read_data function and use it at run time with png_set_read_fn(), rather
293 than changing the library. */
295 #ifndef USE_FAR_KEYWORD
297 pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
301 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
302 * instead of an int, which is what fread() actually returns.
304 READFILE((png_FILE_p)png_ptr->io_ptr, data, length, check);
308 png_error(png_ptr, "Read Error!");
312 /* this is the model-independent version. Since the standard I/O library
313 can't handle far buffers in the medium and small models, we have to copy
317 #define NEAR_BUF_SIZE 1024
318 #define MIN(a,b) (a <= b ? a : b)
321 pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
327 /* Check if data really is near. If so, use usual code. */
328 n_data = (png_byte *)CVT_PTR_NOCHECK(data);
329 io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
330 if ((png_bytep)n_data == data)
332 READFILE(io_ptr, n_data, length, check);
336 png_byte buf[NEAR_BUF_SIZE];
337 png_size_t read, remaining, err;
342 read = MIN(NEAR_BUF_SIZE, remaining);
343 READFILE(io_ptr, buf, 1, err);
344 png_memcpy(data, buf, read); /* copy far buffer to near buffer */
352 while (remaining != 0);
356 png_error(png_ptr, "read Error");
359 #endif /* USE_FAR_KEYWORD */
361 #if defined(PNG_WRITE_FLUSH_SUPPORTED)
363 pngtest_flush(png_structp png_ptr)
365 #if !defined(_WIN32_WCE)
367 io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
374 /* This is the function that does the actual writing of data. If you are
375 not writing to a standard C stream, you should create a replacement
376 write_data function and use it at run time with png_set_write_fn(), rather
377 than changing the library. */
378 #ifndef USE_FAR_KEYWORD
380 pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
384 WRITEFILE((png_FILE_p)png_ptr->io_ptr, data, length, check);
387 png_error(png_ptr, "Write Error");
391 /* this is the model-independent version. Since the standard I/O library
392 can't handle far buffers in the medium and small models, we have to copy
396 #define NEAR_BUF_SIZE 1024
397 #define MIN(a,b) (a <= b ? a : b)
400 pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
403 png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
406 /* Check if data really is near. If so, use usual code. */
407 near_data = (png_byte *)CVT_PTR_NOCHECK(data);
408 io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
409 if ((png_bytep)near_data == data)
411 WRITEFILE(io_ptr, near_data, length, check);
415 png_byte buf[NEAR_BUF_SIZE];
416 png_size_t written, remaining, err;
421 written = MIN(NEAR_BUF_SIZE, remaining);
422 png_memcpy(buf, data, written); /* copy far buffer to near buffer */
423 WRITEFILE(io_ptr, buf, written, err);
429 remaining -= written;
431 while (remaining != 0);
435 png_error(png_ptr, "Write Error");
438 #endif /* USE_FAR_KEYWORD */
439 #endif /* PNG_NO_STDIO */
440 /* END of code to validate stdio-free compilation */
442 /* This function is called when there is a warning, but the library thinks
443 * it can continue anyway. Replacement functions don't have to do anything
444 * here if you don't want to. In the default configuration, png_ptr is
445 * not used, but it is passed in case it may be useful.
448 pngtest_warning(png_structp png_ptr, png_const_charp message)
450 PNG_CONST char *name = "UNKNOWN (ERROR!)";
451 if (png_ptr != NULL && png_ptr->error_ptr != NULL)
452 name = png_ptr->error_ptr;
453 fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
456 /* This is the default error handling function. Note that replacements for
457 * this function MUST NOT RETURN, or the program will likely crash. This
458 * function is used by default, or if the program supplies NULL for the
459 * error function pointer in png_set_error_fn().
462 pngtest_error(png_structp png_ptr, png_const_charp message)
464 pngtest_warning(png_ptr, message);
465 /* We can return because png_error calls the default handler, which is
466 * actually OK in this case. */
469 /* START of code to validate memory allocation and deallocation */
470 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
472 /* Allocate memory. For reasonable files, size should never exceed
473 64K. However, zlib may allocate more then 64K if you don't tell
474 it not to. See zconf.h and png.h for more information. zlib does
475 need to allocate exactly 64K, so whatever you call here must
476 have the ability to do that.
478 This piece of code can be compiled to validate max 64K allocations
479 by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. */
480 typedef struct memory_information
484 struct memory_information FAR *next;
485 } memory_information;
486 typedef memory_information FAR *memory_infop;
488 static memory_infop pinformation = NULL;
489 static int current_allocation = 0;
490 static int maximum_allocation = 0;
491 static int total_allocation = 0;
492 static int num_allocations = 0;
494 png_voidp png_debug_malloc PNGARG((png_structp png_ptr, png_uint_32 size));
495 void png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
498 png_debug_malloc(png_structp png_ptr, png_uint_32 size)
501 /* png_malloc has already tested for NULL; png_create_struct calls
502 png_debug_malloc directly, with png_ptr == NULL which is OK */
507 /* This calls the library allocator twice, once to get the requested
508 buffer and once to get a new free list entry. */
510 /* Disable malloc_fn and free_fn */
512 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
513 pinfo = (memory_infop)png_malloc(png_ptr,
514 (png_uint_32)png_sizeof (*pinfo));
516 current_allocation += size;
517 total_allocation += size;
519 if (current_allocation > maximum_allocation)
520 maximum_allocation = current_allocation;
521 pinfo->pointer = (png_voidp)png_malloc(png_ptr, size);
522 /* Restore malloc_fn and free_fn */
523 png_set_mem_fn(png_ptr, png_voidp_NULL, (png_malloc_ptr)png_debug_malloc,
524 (png_free_ptr)png_debug_free);
525 if (size != 0 && pinfo->pointer == NULL)
527 current_allocation -= size;
528 total_allocation -= size;
530 "out of memory in pngtest->png_debug_malloc.");
532 pinfo->next = pinformation;
533 pinformation = pinfo;
534 /* Make sure the caller isn't assuming zeroed memory. */
535 png_memset(pinfo->pointer, 0xdd, pinfo->size);
537 printf("png_malloc %lu bytes at %x\n",(unsigned long)size,
539 return (png_voidp)(pinfo->pointer);
543 /* Free a pointer. It is removed from the list at the same time. */
545 png_debug_free(png_structp png_ptr, png_voidp ptr)
548 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
551 #if 0 /* This happens all the time. */
552 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
557 /* Unlink the element from the list. */
559 memory_infop FAR *ppinfo = &pinformation;
562 memory_infop pinfo = *ppinfo;
563 if (pinfo->pointer == ptr)
565 *ppinfo = pinfo->next;
566 current_allocation -= pinfo->size;
567 if (current_allocation < 0)
568 fprintf(STDERR, "Duplicate free of memory\n");
569 /* We must free the list element too, but first kill
570 the memory that is to be freed. */
571 png_memset(ptr, 0x55, pinfo->size);
572 png_free_default(png_ptr, pinfo);
576 if (pinfo->next == NULL)
578 fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
581 ppinfo = &pinfo->next;
585 /* Finally free the data. */
587 printf("Freeing %x\n",ptr);
588 png_free_default(png_ptr, ptr);
591 #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
592 /* END of code to test memory allocation/deallocation */
596 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
598 static png_FILE_p fpin;
599 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
600 png_structp read_ptr;
601 png_infop read_info_ptr, end_info_ptr;
602 #ifdef PNG_WRITE_SUPPORTED
603 png_structp write_ptr;
604 png_infop write_info_ptr;
605 png_infop write_end_info_ptr;
607 png_structp write_ptr = NULL;
608 png_infop write_info_ptr = NULL;
609 png_infop write_end_info_ptr = NULL;
613 png_uint_32 width, height;
615 int bit_depth, color_type;
616 #ifdef PNG_SETJMP_SUPPORTED
617 #ifdef USE_FAR_KEYWORD
622 #if defined(_WIN32_WCE)
623 TCHAR path[MAX_PATH];
625 char inbuf[256], outbuf[256];
629 #if defined(_WIN32_WCE)
630 MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
631 if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
633 if ((fpin = fopen(inname, "rb")) == NULL)
636 fprintf(STDERR, "Could not find input file %s\n", inname);
640 #if defined(_WIN32_WCE)
641 MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH);
642 if ((fpout = CreateFile(path, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL)) == INVALID_HANDLE_VALUE)
644 if ((fpout = fopen(outname, "wb")) == NULL)
647 fprintf(STDERR, "Could not open output file %s\n", outname);
652 png_debug(0, "Allocating read and write structures\n");
653 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
654 read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
655 png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
656 (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
658 read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
659 png_error_ptr_NULL, png_error_ptr_NULL);
661 png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
663 #ifdef PNG_WRITE_SUPPORTED
664 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
665 write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
666 png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
667 (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
669 write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
670 png_error_ptr_NULL, png_error_ptr_NULL);
672 png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
675 png_debug(0, "Allocating read_info, write_info and end_info structures\n");
676 read_info_ptr = png_create_info_struct(read_ptr);
677 end_info_ptr = png_create_info_struct(read_ptr);
678 #ifdef PNG_WRITE_SUPPORTED
679 write_info_ptr = png_create_info_struct(write_ptr);
680 write_end_info_ptr = png_create_info_struct(write_ptr);
683 #ifdef PNG_SETJMP_SUPPORTED
684 png_debug(0, "Setting jmpbuf for read struct\n");
685 #ifdef USE_FAR_KEYWORD
688 if (setjmp(png_jmpbuf(read_ptr)))
691 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
692 png_free(read_ptr, row_buf);
693 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
694 #ifdef PNG_WRITE_SUPPORTED
695 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
696 png_destroy_write_struct(&write_ptr, &write_info_ptr);
702 #ifdef USE_FAR_KEYWORD
703 png_memcpy(png_jmpbuf(read_ptr),jmpbuf,png_sizeof(jmp_buf));
706 #ifdef PNG_WRITE_SUPPORTED
707 png_debug(0, "Setting jmpbuf for write struct\n");
708 #ifdef USE_FAR_KEYWORD
711 if (setjmp(png_jmpbuf(write_ptr)))
714 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
715 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
716 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
717 #ifdef PNG_WRITE_SUPPORTED
718 png_destroy_write_struct(&write_ptr, &write_info_ptr);
724 #ifdef USE_FAR_KEYWORD
725 png_memcpy(png_jmpbuf(write_ptr),jmpbuf,png_sizeof(jmp_buf));
730 png_debug(0, "Initializing input and output streams\n");
731 #if !defined(PNG_NO_STDIO)
732 png_init_io(read_ptr, fpin);
733 # ifdef PNG_WRITE_SUPPORTED
734 png_init_io(write_ptr, fpout);
737 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
738 # ifdef PNG_WRITE_SUPPORTED
739 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
740 # if defined(PNG_WRITE_FLUSH_SUPPORTED)
747 if(status_dots_requested == 1)
749 #ifdef PNG_WRITE_SUPPORTED
750 png_set_write_status_fn(write_ptr, write_row_callback);
752 png_set_read_status_fn(read_ptr, read_row_callback);
756 #ifdef PNG_WRITE_SUPPORTED
757 png_set_write_status_fn(write_ptr, png_write_status_ptr_NULL);
759 png_set_read_status_fn(read_ptr, png_read_status_ptr_NULL);
762 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
767 png_set_read_user_transform_fn(read_ptr, count_filters);
770 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
772 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
775 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
776 # ifndef PNG_HANDLE_CHUNK_ALWAYS
777 # define PNG_HANDLE_CHUNK_ALWAYS 3
779 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
782 #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
783 # ifndef PNG_HANDLE_CHUNK_IF_SAFE
784 # define PNG_HANDLE_CHUNK_IF_SAFE 2
786 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_IF_SAFE,
790 png_debug(0, "Reading info struct\n");
791 png_read_info(read_ptr, read_info_ptr);
793 png_debug(0, "Transferring info struct\n");
795 int interlace_type, compression_type, filter_type;
797 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
798 &color_type, &interlace_type, &compression_type, &filter_type))
800 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
801 #if defined(PNG_WRITE_INTERLACING_SUPPORTED)
802 color_type, interlace_type, compression_type, filter_type);
804 color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
808 #if defined(PNG_FIXED_POINT_SUPPORTED)
809 #if defined(PNG_cHRM_SUPPORTED)
811 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
813 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
814 &red_y, &green_x, &green_y, &blue_x, &blue_y))
816 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
817 red_y, green_x, green_y, blue_x, blue_y);
821 #if defined(PNG_gAMA_SUPPORTED)
823 png_fixed_point gamma;
825 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
827 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
831 #else /* Use floating point versions */
832 #if defined(PNG_FLOATING_POINT_SUPPORTED)
833 #if defined(PNG_cHRM_SUPPORTED)
835 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
837 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
838 &red_y, &green_x, &green_y, &blue_x, &blue_y))
840 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
841 red_y, green_x, green_y, blue_x, blue_y);
845 #if defined(PNG_gAMA_SUPPORTED)
849 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
851 png_set_gAMA(write_ptr, write_info_ptr, gamma);
855 #endif /* floating point */
856 #endif /* fixed point */
857 #if defined(PNG_iCCP_SUPPORTED)
862 int compression_type;
864 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
867 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
872 #if defined(PNG_sRGB_SUPPORTED)
876 if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
878 png_set_sRGB(write_ptr, write_info_ptr, intent);
886 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
888 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
891 #if defined(PNG_bKGD_SUPPORTED)
893 png_color_16p background;
895 if (png_get_bKGD(read_ptr, read_info_ptr, &background))
897 png_set_bKGD(write_ptr, write_info_ptr, background);
901 #if defined(PNG_hIST_SUPPORTED)
905 if (png_get_hIST(read_ptr, read_info_ptr, &hist))
907 png_set_hIST(write_ptr, write_info_ptr, hist);
911 #if defined(PNG_oFFs_SUPPORTED)
913 png_int_32 offset_x, offset_y;
916 if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type))
918 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
922 #if defined(PNG_pCAL_SUPPORTED)
924 png_charp purpose, units;
929 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
930 &nparams, &units, ¶ms))
932 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
933 nparams, units, params);
937 #if defined(PNG_pHYs_SUPPORTED)
939 png_uint_32 res_x, res_y;
942 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
944 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
948 #if defined(PNG_sBIT_SUPPORTED)
950 png_color_8p sig_bit;
952 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
954 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
958 #if defined(PNG_sCAL_SUPPORTED)
959 #ifdef PNG_FLOATING_POINT_SUPPORTED
962 double scal_width, scal_height;
964 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
967 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
971 #ifdef PNG_FIXED_POINT_SUPPORTED
974 png_charp scal_width, scal_height;
976 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
979 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width, scal_height);
985 #if defined(PNG_TEXT_SUPPORTED)
990 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
992 png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text);
993 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
997 #if defined(PNG_tIME_SUPPORTED)
1001 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
1003 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1004 #if defined(PNG_TIME_RFC1123_SUPPORTED)
1005 /* we have to use png_memcpy instead of "=" because the string
1006 pointed to by png_convert_to_rfc1123() gets free'ed before
1008 png_memcpy(tIME_string,
1009 png_convert_to_rfc1123(read_ptr, mod_time),
1010 png_sizeof(tIME_string));
1011 tIME_string[png_sizeof(tIME_string)-1] = '\0';
1012 tIME_chunk_present++;
1013 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1017 #if defined(PNG_tRNS_SUPPORTED)
1021 png_color_16p trans_values;
1023 if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans,
1026 int sample_max = (1 << read_info_ptr->bit_depth);
1027 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1028 if (!((read_info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
1029 (int)trans_values->gray > sample_max) ||
1030 (read_info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
1031 ((int)trans_values->red > sample_max ||
1032 (int)trans_values->green > sample_max ||
1033 (int)trans_values->blue > sample_max))))
1034 png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
1039 #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
1041 png_unknown_chunkp unknowns;
1042 int num_unknowns = (int)png_get_unknown_chunks(read_ptr, read_info_ptr,
1047 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1049 /* copy the locations from the read_info_ptr. The automatically
1050 generated locations in write_info_ptr are wrong because we
1051 haven't written anything yet */
1052 for (i = 0; i < (png_size_t)num_unknowns; i++)
1053 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1054 unknowns[i].location);
1059 #ifdef PNG_WRITE_SUPPORTED
1060 png_debug(0, "\nWriting info struct\n");
1062 /* If we wanted, we could write info in two steps:
1063 png_write_info_before_PLTE(write_ptr, write_info_ptr);
1065 png_write_info(write_ptr, write_info_ptr);
1068 #ifdef SINGLE_ROWBUF_ALLOC
1069 png_debug(0, "\nAllocating row buffer...");
1070 row_buf = (png_bytep)png_malloc(read_ptr,
1071 png_get_rowbytes(read_ptr, read_info_ptr));
1072 png_debug1(0, "0x%08lx\n\n", (unsigned long)row_buf);
1073 #endif /* SINGLE_ROWBUF_ALLOC */
1074 png_debug(0, "Writing row data\n");
1076 #if defined(PNG_READ_INTERLACING_SUPPORTED) || \
1077 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1078 num_pass = png_set_interlace_handling(read_ptr);
1079 # ifdef PNG_WRITE_SUPPORTED
1080 png_set_interlace_handling(write_ptr);
1086 #ifdef PNGTEST_TIMING
1087 t_stop = (float)clock();
1088 t_misc += (t_stop - t_start);
1091 for (pass = 0; pass < num_pass; pass++)
1093 png_debug1(0, "Writing row data for pass %d\n",pass);
1094 for (y = 0; y < height; y++)
1096 #ifndef SINGLE_ROWBUF_ALLOC
1097 png_debug2(0, "\nAllocating row buffer (pass %d, y = %ld)...", pass,y);
1098 row_buf = (png_bytep)png_malloc(read_ptr,
1099 png_get_rowbytes(read_ptr, read_info_ptr));
1100 png_debug2(0, "0x%08lx (%ld bytes)\n", (unsigned long)row_buf,
1101 png_get_rowbytes(read_ptr, read_info_ptr));
1102 #endif /* !SINGLE_ROWBUF_ALLOC */
1103 png_read_rows(read_ptr, (png_bytepp)&row_buf, png_bytepp_NULL, 1);
1105 #ifdef PNG_WRITE_SUPPORTED
1106 #ifdef PNGTEST_TIMING
1107 t_stop = (float)clock();
1108 t_decode += (t_stop - t_start);
1111 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1112 #ifdef PNGTEST_TIMING
1113 t_stop = (float)clock();
1114 t_encode += (t_stop - t_start);
1117 #endif /* PNG_WRITE_SUPPORTED */
1119 #ifndef SINGLE_ROWBUF_ALLOC
1120 png_debug2(0, "Freeing row buffer (pass %d, y = %ld)\n\n", pass, y);
1121 png_free(read_ptr, row_buf);
1122 #endif /* !SINGLE_ROWBUF_ALLOC */
1126 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
1127 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1129 #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
1130 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1133 png_debug(0, "Reading and writing end_info data\n");
1135 png_read_end(read_ptr, end_info_ptr);
1136 #if defined(PNG_TEXT_SUPPORTED)
1141 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1143 png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks\n", num_text);
1144 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1148 #if defined(PNG_tIME_SUPPORTED)
1152 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
1154 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1155 #if defined(PNG_TIME_RFC1123_SUPPORTED)
1156 /* we have to use png_memcpy instead of "=" because the string
1157 pointed to by png_convert_to_rfc1123() gets free'ed before
1159 png_memcpy(tIME_string,
1160 png_convert_to_rfc1123(read_ptr, mod_time),
1161 png_sizeof(tIME_string));
1162 tIME_string[png_sizeof(tIME_string)-1] = '\0';
1163 tIME_chunk_present++;
1164 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1168 #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
1170 png_unknown_chunkp unknowns;
1172 num_unknowns = (int)png_get_unknown_chunks(read_ptr, end_info_ptr,
1177 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1179 /* copy the locations from the read_info_ptr. The automatically
1180 generated locations in write_end_info_ptr are wrong because we
1181 haven't written the end_info yet */
1182 for (i = 0; i < (png_size_t)num_unknowns; i++)
1183 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1184 unknowns[i].location);
1188 #ifdef PNG_WRITE_SUPPORTED
1189 png_write_end(write_ptr, write_end_info_ptr);
1192 #ifdef PNG_EASY_ACCESS_SUPPORTED
1195 png_uint_32 iwidth, iheight;
1196 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1197 iheight = png_get_image_height(write_ptr, write_info_ptr);
1198 fprintf(STDERR, "Image width = %lu, height = %lu\n",
1199 (unsigned long)iwidth, (unsigned long)iheight);
1203 png_debug(0, "Destroying data structs\n");
1204 #ifdef SINGLE_ROWBUF_ALLOC
1205 png_debug(1, "destroying row_buf for read_ptr\n");
1206 png_free(read_ptr, row_buf);
1208 #endif /* SINGLE_ROWBUF_ALLOC */
1209 png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr\n");
1210 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1211 #ifdef PNG_WRITE_SUPPORTED
1212 png_debug(1, "destroying write_end_info_ptr\n");
1213 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1214 png_debug(1, "destroying write_ptr, write_info_ptr\n");
1215 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1217 png_debug(0, "Destruction complete.\n");
1222 png_debug(0, "Opening files for comparison\n");
1223 #if defined(_WIN32_WCE)
1224 MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
1225 if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
1227 if ((fpin = fopen(inname, "rb")) == NULL)
1230 fprintf(STDERR, "Could not find file %s\n", inname);
1234 #if defined(_WIN32_WCE)
1235 MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH);
1236 if ((fpout = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
1238 if ((fpout = fopen(outname, "rb")) == NULL)
1241 fprintf(STDERR, "Could not find file %s\n", outname);
1248 png_size_t num_in, num_out;
1250 READFILE(fpin, inbuf, 1, num_in);
1251 READFILE(fpout, outbuf, 1, num_out);
1253 if (num_in != num_out)
1255 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1257 if(wrote_question == 0)
1260 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1261 inname,PNG_ZBUF_SIZE);
1263 "\n filtering heuristic (libpng default), compression");
1265 " level (zlib default),\n and zlib version (%s)?\n\n",
1277 if (png_memcmp(inbuf, outbuf, num_in))
1279 fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
1280 if(wrote_question == 0)
1283 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1284 inname,PNG_ZBUF_SIZE);
1286 "\n filtering heuristic (libpng default), compression");
1288 " level (zlib default),\n and zlib version (%s)?\n\n",
1304 /* input and output filenames */
1306 static PNG_CONST char *inname = "pngtest/png";
1307 static PNG_CONST char *outname = "pngout/png";
1309 static PNG_CONST char *inname = "pngtest.png";
1310 static PNG_CONST char *outname = "pngout.png";
1314 main(int argc, char *argv[])
1319 fprintf(STDERR, "Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1320 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1321 fprintf(STDERR,"%s",png_get_copyright(NULL));
1322 /* Show the version of libpng used in building the library */
1323 fprintf(STDERR," library (%lu):%s",
1324 (unsigned long)png_access_version_number(),
1325 png_get_header_version(NULL));
1326 /* Show the version of libpng used in building the application */
1327 fprintf(STDERR," pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1328 PNG_HEADER_VERSION_STRING);
1329 fprintf(STDERR," png_sizeof(png_struct)=%ld, png_sizeof(png_info)=%ld\n",
1330 (long)png_sizeof(png_struct), (long)png_sizeof(png_info));
1332 /* Do some consistency checking on the memory allocation settings, I'm
1333 not sure this matters, but it is nice to know, the first of these
1334 tests should be impossible because of the way the macros are set
1336 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1337 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1339 /* I think the following can happen. */
1340 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1341 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1344 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1347 "Warning: versions are different between png.h and png.c\n");
1348 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1349 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1355 if (strcmp(argv[1], "-m") == 0)
1358 status_dots_requested = 0;
1360 else if (strcmp(argv[1], "-mv") == 0 ||
1361 strcmp(argv[1], "-vm") == 0 )
1365 status_dots_requested = 1;
1367 else if (strcmp(argv[1], "-v") == 0)
1370 status_dots_requested = 1;
1376 status_dots_requested = 0;
1380 if (!multiple && argc == 3+verbose)
1381 outname = argv[2+verbose];
1383 if ((!multiple && argc > 3+verbose) || (multiple && argc < 2))
1386 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1389 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1391 " with -m %s is used as a temporary file\n", outname);
1398 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1399 int allocation_now = current_allocation;
1401 for (i=2; i<argc; ++i)
1403 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
1407 fprintf(STDERR, "Testing %s:",argv[i]);
1408 kerror = test_one_file(argv[i], outname);
1411 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
1412 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1413 (unsigned long)zero_samples);
1415 fprintf(STDERR, " PASS\n");
1417 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
1418 for (k=0; k<256; k++)
1420 fprintf(STDERR, " Filter %d was used %lu times\n",
1421 k,(unsigned long)filters_used[k]);
1423 #if defined(PNG_TIME_RFC1123_SUPPORTED)
1424 if(tIME_chunk_present != 0)
1425 fprintf(STDERR, " tIME = %s\n",tIME_string);
1426 tIME_chunk_present = 0;
1427 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1431 fprintf(STDERR, " FAIL\n");
1434 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1435 if (allocation_now != current_allocation)
1436 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1437 current_allocation-allocation_now);
1438 if (current_allocation != 0)
1440 memory_infop pinfo = pinformation;
1442 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1443 current_allocation);
1444 while (pinfo != NULL)
1446 fprintf(STDERR, " %lu bytes at %x\n", (unsigned long)pinfo->size,
1447 (unsigned int) pinfo->pointer);
1448 pinfo = pinfo->next;
1453 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1454 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1455 current_allocation);
1456 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1457 maximum_allocation);
1458 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1460 fprintf(STDERR, " Number of allocations: %10d\n",
1470 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1471 int allocation_now = current_allocation;
1473 if (i == 1) status_dots_requested = 1;
1474 else if(verbose == 0)status_dots_requested = 0;
1475 if (i == 0 || verbose == 1 || ierror != 0)
1476 fprintf(STDERR, "Testing %s:",inname);
1477 kerror = test_one_file(inname, outname);
1480 if(verbose == 1 || i == 2)
1482 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
1485 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
1486 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1487 (unsigned long)zero_samples);
1489 fprintf(STDERR, " PASS\n");
1491 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
1492 for (k=0; k<256; k++)
1494 fprintf(STDERR, " Filter %d was used %lu times\n",
1495 k,(unsigned long)filters_used[k]);
1497 #if defined(PNG_TIME_RFC1123_SUPPORTED)
1498 if(tIME_chunk_present != 0)
1499 fprintf(STDERR, " tIME = %s\n",tIME_string);
1500 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1505 if(verbose == 0 && i != 2)
1506 fprintf(STDERR, "Testing %s:",inname);
1507 fprintf(STDERR, " FAIL\n");
1510 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1511 if (allocation_now != current_allocation)
1512 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1513 current_allocation-allocation_now);
1514 if (current_allocation != 0)
1516 memory_infop pinfo = pinformation;
1518 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1519 current_allocation);
1520 while (pinfo != NULL)
1522 fprintf(STDERR," %lu bytes at %x\n",
1523 (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
1524 pinfo = pinfo->next;
1529 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1530 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1531 current_allocation);
1532 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1533 maximum_allocation);
1534 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1536 fprintf(STDERR, " Number of allocations: %10d\n",
1541 #ifdef PNGTEST_TIMING
1542 t_stop = (float)clock();
1543 t_misc += (t_stop - t_start);
1545 fprintf(STDERR," CPU time used = %.3f seconds",
1546 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
1547 fprintf(STDERR," (decoding %.3f,\n",
1548 t_decode/(float)CLOCKS_PER_SEC);
1549 fprintf(STDERR," encoding %.3f ,",
1550 t_encode/(float)CLOCKS_PER_SEC);
1551 fprintf(STDERR," other %.3f seconds)\n\n",
1552 t_misc/(float)CLOCKS_PER_SEC);
1556 fprintf(STDERR, "libpng passes test\n");
1558 fprintf(STDERR, "libpng FAILS test\n");
1559 return (int)(ierror != 0);
1562 /* Generate a compiler error if there is an old png.h in the search path. */
1563 typedef version_1_2_29 your_png_h_is_not_version_1_2_29;