/* pngtest.c - a simple test program to test libpng
*
- * libpng 1.0.1
+ * libpng 1.0.3 -January 14, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
- * Copyright (c) 1998, Glenn Randers-Pehrson
- * March 15, 1998
+ * Copyright (c) 1998, 1999 Glenn Randers-Pehrson
*
* 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
* properly. It does not currently test all of the transforms, although
* it probably should.
*
- * The program will fail in certain legitimate cases:
+ * The program will report "FAIL" in certain legitimate cases:
* 1) when the compression level or filter selection method is changed.
- * 2) when the chunk size is smaller than 8K.
+ * 2) when the chunk size is not 8K.
* 3) unknown ancillary 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"
*
* 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.
+ * 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 <stdio.h>
#include "png.h"
+#if defined(PNG_TIME_RFC1123_SUPPORTED)
+static int tIME_chunk_present=0;
+static char tIME_string[30] = "no tIME chunk present in file";
+#endif /* PNG_TIME_RFC1123_SUPPORTED */
+
int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
#ifdef __TURBOC__
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
/* example of using user transform callback (we don't transform anything,
- but merely count the black pixels) */
+ but merely count the zero samples) */
-static png_uint_32 black_pixels;
+static png_uint_32 zero_samples;
void
-count_black_pixels(png_structp png_ptr, png_row_infop row_info, png_bytep data)
+count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
{
png_bytep dp = data;
- if(png_ptr == NULL)return;
+ if(png_ptr == NULL)return;
/* contents of row_info:
* png_uint_32 width width of row
* png_byte pixel_depth bits per pixel (depth*channels)
*/
- /* counts the number of black pixels (or zero pixels if color_type is 3 */
+ /* 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;
- for (n=0; n<row_info->width; n++)
+ 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) black_pixels++;
+ {
+ if(((*dp << pos++ )& 0x80) == 0) zero_samples++;
if(pos == 8)
{
- pos=0;
+ pos = 0;
dp++;
}
+ }
if(row_info->bit_depth == 2)
- if(((*dp << (pos+=2))& 0xc0) == 0) black_pixels++;
+ {
+ if(((*dp << (pos+=2))& 0xc0) == 0) zero_samples++;
if(pos == 8)
{
- pos=0;
+ pos = 0;
dp++;
}
+ }
if(row_info->bit_depth == 4)
- if(((*dp << (pos+=4))& 0xf0) == 0) black_pixels++;
+ {
+ if(((*dp << (pos+=4))& 0xf0) == 0) zero_samples++;
if(pos == 8)
{
- pos=0;
+ pos = 0;
dp++;
}
+ }
if(row_info->bit_depth == 8)
- if(*dp++ == 0) black_pixels++;
+ if(*dp++ == 0) zero_samples++;
if(row_info->bit_depth == 16)
{
- if((*dp | *(dp+1)) == 0) black_pixels++;
+ if((*dp | *(dp+1)) == 0) zero_samples++;
dp+=2;
}
}
}
else /* other color types */
{
- png_uint_32 n;
+ png_uint_32 n, nstop;
int channel;
int color_channels = row_info->channels;
if(row_info->color_type > 3)color_channels--;
- for (n=0; n<row_info->width; n++)
+ 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) black_pixels++;
+ if(*dp++ == 0) zero_samples++;
if(row_info->bit_depth == 16)
{
- if((*dp | *(dp+1)) == 0) black_pixels++;
+ if((*dp | *(dp+1)) == 0) zero_samples++;
dp+=2;
}
}
/* 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 which does the actual reading of data. If you are
+/* 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. */
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
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
}
#endif
-/* This is the function which does the actual writing of data. If you are
+/* 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. */
png_default_error(png_structp png_ptr, png_const_charp message)
{
png_default_warning(png_ptr, message);
- /* We can return because png_error calls the default handler which is
- * actually ok in this case. */
+ /* We can return because png_error calls the default handler, which is
+ * actually OK in this case. */
}
#endif /* PNG_NO_STDIO */
/* END of code to validate stdio-free compilation */
/* START of code to validate memory allocation and deallocation */
-#ifdef PNGTEST_MEMORY_DEBUG
-/* Borland DOS special memory handler */
-#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
-ERROR - memory debugging is not supported on this platform
-#else
+#ifdef PNG_USER_MEM_SUPPORTED
/* Allocate memory. For reasonable files, size should never exceed
64K. However, zlib may allocate more then 64K if you don't tell
by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. */
typedef struct memory_information {
png_uint_32 size;
- png_voidp pointer;
+ png_voidp pointer;
struct memory_information FAR *next;
} memory_information;
typedef memory_information FAR *memory_infop;
png_voidp ptr));
png_voidp
-png_malloc(png_structp png_ptr, png_uint_32 size) {
- if (png_ptr == NULL) {
- fprintf(STDERR, "NULL pointer to memory allocator\n");
- return (NULL);
- }
+png_debug_malloc(png_structp png_ptr, png_uint_32 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 (png_voidp)(NULL);
/* This calls the library allocator twice, once to get the requested
buffer and once to get a new free list entry. */
{
- memory_infop pinfo = png_debug_malloc(png_ptr, sizeof *pinfo);
+ memory_infop pinfo = png_malloc_default(png_ptr, sizeof *pinfo);
pinfo->size = size;
current_allocation += size;
if (current_allocation > maximum_allocation)
maximum_allocation = current_allocation;
- pinfo->pointer = png_debug_malloc(png_ptr, size);
+ pinfo->pointer = png_malloc_default(png_ptr, size);
pinfo->next = pinformation;
pinformation = pinfo;
/* Make sure the caller isn't assuming zeroed memory. */
/* Free a pointer. It is removed from the list at the same time. */
void
-png_free(png_structp png_ptr, png_voidp ptr)
+png_debug_free(png_structp png_ptr, png_voidp ptr)
{
if (png_ptr == NULL)
- fprintf(STDERR, "NULL pointer to memory allocator\n");
+ 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");
if (current_allocation < 0)
fprintf(STDERR, "Duplicate free of memory\n");
/* We must free the list element too, but first kill
- the memory which is to be freed. */
+ the memory that is to be freed. */
memset(ptr, 0x55, pinfo->size);
- png_debug_free(png_ptr, pinfo);
+ png_free_default(png_ptr, pinfo);
break;
}
if (pinfo->next == NULL) {
}
/* Finally free the data. */
- png_debug_free(png_ptr, ptr);
+ png_free_default(png_ptr, ptr);
}
-#endif /* Not Borland DOS special memory handler */
-#endif
+#endif /* PNG_USER_MEM_SUPPORTED */
/* END of code to test memory allocation/deallocation */
/* Test one file */
#ifdef USE_FAR_KEYWORD
jmp_buf jmpbuf;
#endif
-
+
char inbuf[256], outbuf[256];
row_buf = (png_bytep)NULL;
}
png_debug(0, "Allocating read and write structures\n");
+#ifdef PNG_USER_MEM_SUPPORTED
+ read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
+ (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL,
+ (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
+#else
read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
(png_error_ptr)NULL, (png_error_ptr)NULL);
+#endif
#if defined(PNG_NO_STDIO)
png_set_error_fn(read_ptr, (png_voidp)inname, png_default_error,
png_default_warning);
#endif
+#ifdef PNG_USER_MEM_SUPPORTED
+ write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
+ (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL,
+ (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
+#else
write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
(png_error_ptr)NULL, (png_error_ptr)NULL);
+#endif
#if defined(PNG_NO_STDIO)
png_set_error_fn(write_ptr, (png_voidp)inname, png_default_error,
png_default_warning);
read_info_ptr = png_create_info_struct(read_ptr);
write_info_ptr = png_create_info_struct(write_ptr);
end_info_ptr = png_create_info_struct(read_ptr);
+#ifdef PNG_USER_MEM_SUPPORTED
+#endif
png_debug(0, "Setting jmpbuf for read struct\n");
#ifdef USE_FAR_KEYWORD
fclose(fpout);
return (1);
}
+#ifdef USE_FAR_KEYWORD
+ png_memcpy(read_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
+#endif
png_debug(0, "Setting jmpbuf for write struct\n");
#ifdef USE_FAR_KEYWORD
- png_memcpy(read_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
if (setjmp(jmpbuf))
#else
if (setjmp(write_ptr->jmpbuf))
fclose(fpout);
return (1);
}
-
#ifdef USE_FAR_KEYWORD
png_memcpy(write_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
#endif
+
png_debug(0, "Initializing input and output streams\n");
#if !defined(PNG_NO_STDIO)
png_init_io(read_ptr, fpin);
}
# if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
- black_pixels=0;
- png_set_write_user_transform_fn(write_ptr, count_black_pixels);
+ zero_samples=0;
+ png_set_write_user_transform_fn(write_ptr, count_zero_samples);
# endif
png_debug(0, "Reading info struct\n");
if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
{
png_set_tIME(write_ptr, write_info_ptr, mod_time);
+#if defined(PNG_TIME_RFC1123_SUPPORTED)
+ /* we have to use png_strcpy instead of "=" because the string
+ pointed to by png_convert_to_rfc1123() gets free'ed before
+ we use it */
+ png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time));
+ tIME_chunk_present++;
+#endif /* PNG_TIME_RFC1123_SUPPORTED */
}
}
#endif
png_write_info(write_ptr, write_info_ptr);
png_debug(0, "\nAllocating row buffer \n");
- row_buf = (png_bytep)png_malloc(read_ptr,
+ row_buf = (png_bytep)png_malloc(read_ptr,
png_get_rowbytes(read_ptr, read_info_ptr));
if (row_buf == NULL)
{
png_debug(0, "Reading and writing end_info data\n");
png_read_end(read_ptr, end_info_ptr);
png_write_end(write_ptr, end_info_ptr);
-
+
#ifdef PNG_EASY_ACCESS_SUPPORTED
if(verbose)
{
fprintf(STDERR, "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));
/* 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
if (multiple)
{
int i;
-#ifdef PNGTEST_MEMORY_DEBUG
+#ifdef PNG_USER_MEM_SUPPORTED
int allocation_now = current_allocation;
#endif
for (i=2; i<argc; ++i)
int kerror;
fprintf(STDERR, "Testing %s:",argv[i]);
kerror = test_one_file(argv[i], outname);
- if (kerror == 0)
+ if (kerror == 0)
+ {
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
- fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels);
+ fprintf(STDERR, " PASS (%lu zero samples)\n",zero_samples);
#else
fprintf(STDERR, " PASS\n");
#endif
- else {
+#if defined(PNG_TIME_RFC1123_SUPPORTED)
+ if(tIME_chunk_present != 0)
+ fprintf(STDERR, " tIME = %s\n",tIME_string);
+ tIME_chunk_present = 0;
+#endif /* PNG_TIME_RFC1123_SUPPORTED */
+ }
+ else
+ {
fprintf(STDERR, " FAIL\n");
ierror += kerror;
- }
-#ifdef PNGTEST_MEMORY_DEBUG
+ }
+#ifdef PNG_USER_MEM_SUPPORTED
if (allocation_now != current_allocation)
fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
current_allocation-allocation_now);
}
#endif
}
-#ifdef PNGTEST_MEMORY_DEBUG
+#ifdef PNG_USER_MEM_SUPPORTED
fprintf(STDERR, "Maximum memory allocation: %d bytes\n",
maximum_allocation);
#endif
int i;
for (i=0; i<3; ++i) {
int kerror;
-#ifdef PNGTEST_MEMORY_DEBUG
+#ifdef PNG_USER_MEM_SUPPORTED
int allocation_now = current_allocation;
#endif
if (i == 1) status_dots_requested = 1;
if(kerror == 0)
{
if(verbose == 1 || i == 2)
+ {
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
- fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels);
+ fprintf(STDERR, " PASS (%lu zero samples)\n",zero_samples);
#else
fprintf(STDERR, " PASS\n");
#endif
+#if defined(PNG_TIME_RFC1123_SUPPORTED)
+ if(tIME_chunk_present != 0)
+ fprintf(STDERR, " tIME = %s\n",tIME_string);
+#endif /* PNG_TIME_RFC1123_SUPPORTED */
+ }
}
else
{
fprintf(STDERR, " FAIL\n");
ierror += kerror;
}
-#ifdef PNGTEST_MEMORY_DEBUG
+#ifdef PNG_USER_MEM_SUPPORTED
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) {
}
#endif
}
-#ifdef PNGTEST_MEMORY_DEBUG
+#ifdef PNG_USER_MEM_SUPPORTED
fprintf(STDERR, "Maximum memory allocation: %d bytes\n",
maximum_allocation);
#endif
fprintf(STDERR, "libpng FAILS test\n");
return (int)(ierror != 0);
}
+
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