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Imported from libpng-0.99i.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-03-07 06:06:55 -06:00
parent cbe52d8720
commit 08a3343e05
48 changed files with 1232 additions and 174 deletions
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169
pngtest.c
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@@ -1,12 +1,12 @@
/* pngtest.c - a simple test program to test libpng
*
* libpng 0.99e
* libpng 1.00
* 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
* February 28, 1998
* March 7, 1998
*
* 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
@@ -32,8 +32,8 @@
/* Makes pngtest verbose so we can find problems (needs to be before png.h) */
#ifndef PNG_DEBUG
#define PNG_DEBUG 0
#endif
#define PNG_DEBUG 0
#include "png.h"
@@ -47,6 +47,126 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname);
/* #define STDERR stderr */
#define STDERR stdout /* for DOS */
/* 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 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
void read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
{
if(png_ptr == NULL || row_number > 0x3fffffff) return;
if(status_pass != pass)
{
fprintf(stdout,"\n Pass %d: ",pass);
status_pass = pass;
status_dots = 30;
}
status_dots--;
if(status_dots == 0)
{
fprintf(stdout, "\n ");
status_dots=30;
}
fprintf(stdout, "r");
}
void write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
void write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
{
if(png_ptr == NULL || row_number > 0x3fffffff || pass > 7) return;
fprintf(stdout, "w");
}
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
/* example of using user transform callback (we don't transform anything,
but merely count the black pixels) */
static png_uint_32 black_pixels;
void count_black_pixels(png_structp png_ptr, png_row_infop row_info,
png_bytep data);
void count_black_pixels(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 black pixels (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<(int)row_info->width; n++)
{
if(row_info->bit_depth == 1)
if(((*dp << pos++ )& 0x80) == 0) black_pixels++;
if(pos == 8)
{
pos=0;
dp++;
}
if(row_info->bit_depth == 2)
if(((*dp << (pos+=2))& 0xc0) == 0) black_pixels++;
if(pos == 8)
{
pos=0;
dp++;
}
if(row_info->bit_depth == 4)
if(((*dp << (pos+=4))& 0xf0) == 0) black_pixels++;
if(pos == 8)
{
pos=0;
dp++;
}
if(row_info->bit_depth == 8)
if(*dp++ == 0) black_pixels++;
if(row_info->bit_depth == 16)
{
if((*dp | *(dp+1)) == 0) black_pixels++;
dp+=2;
}
}
}
else /* other color types */
{
png_uint_32 n;
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 (channel = 0; channel < color_channels; channel++)
{
if(row_info->bit_depth == 8)
if(*dp++ == 0) black_pixels++;
if(row_info->bit_depth == 16)
{
if((*dp | *(dp+1)) == 0) black_pixels++;
dp+=2;
}
}
if(row_info->color_type > 3)
{
dp++;
if(row_info->bit_depth == 16)dp++;
}
}
}
}
#endif /* PNG_READ|WRITE_USER_TRANSFORM_SUPPORTED */
static int verbose = 0;
static int wrote_question = 0;
@@ -439,6 +559,22 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
#else
NULL);
#endif
#endif
if(status_dots_requested == 1)
{
png_set_write_status_fn(write_ptr, write_row_callback);
png_set_read_status_fn(read_ptr, read_row_callback);
}
else
{
png_set_write_status_fn(write_ptr, NULL);
png_set_read_status_fn(read_ptr, NULL);
}
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
black_pixels=0;
png_set_write_user_transform_fn(write_ptr, count_black_pixels);
#endif
png_debug(0, "Reading info struct\n");
@@ -730,8 +866,8 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
/* input and output filenames */
#ifdef RISCOS
PNG_CONST char *inname = "pngtest_png";
PNG_CONST char *outname = "pngout_png";
PNG_CONST char *inname = "pngtest/png";
PNG_CONST char *outname = "pngout/png";
#else
static char *inname = "pngtest.png";
static char *outname = "pngout.png";
@@ -770,20 +906,28 @@ main(int argc, char *argv[])
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)
@@ -813,7 +957,12 @@ main(int argc, char *argv[])
fprintf(STDERR, "Testing %s:",argv[i]);
kerror = test_one_file(argv[i], outname);
if (kerror == 0)
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels);
#else
fprintf(STDERR, " PASS\n");
#endif
else {
fprintf(STDERR, " FAIL\n");
ierror += kerror;
@@ -847,12 +996,20 @@ main(int argc, char *argv[])
#ifdef PNGTEST_MEMORY_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, "Testing %s:",inname);
kerror = test_one_file(inname, outname);
if(kerror == 0)
{
if(verbose == 1 || i == 2) fprintf(STDERR, " PASS\n");
if(verbose == 1 || i == 2)
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels);
#else
fprintf(STDERR, " PASS\n");
#endif
}
else
{