Imported from libpng-1.0.7beta15.tar
diff --git a/libpng.3 b/libpng.3
index 74267aa..0611767 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "May 17, 2000"
+.TH LIBPNG 3 "May 29, 2000"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta14
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta15
.SH SYNOPSIS
\fI\fB
@@ -274,11 +274,11 @@
\fI\fB
-\fBpng_uint_32 png_get_x_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+\fBpng_int_32 png_get_x_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
-\fBpng_uint_32 png_get_x_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+\fBpng_int_32 png_get_x_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
@@ -286,11 +286,11 @@
\fI\fB
-\fBpng_uint_32 png_get_y_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+\fBpng_int_32 png_get_y_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
-\fBpng_uint_32 png_get_y_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+\fBpng_int_32 png_get_y_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
@@ -747,7 +747,7 @@
.SH LIBPNG.TXT
libpng.txt - A description on how to use and modify libpng
- libpng version 1.0.7beta14 - May 17, 2000
+ libpng version 1.0.7beta15 - May 29, 2000
Updated and distributed by Glenn Randers-Pehrson
<randeg@alum.rpi.edu>
Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -895,13 +895,13 @@
FILE *fp = fopen(file_name, "rb");
if (!fp)
{
- return;
+ return (ERROR);
}
fread(header, 1, number, fp);
is_png = !png_sig_cmp(header, 0, number);
if (!is_png)
{
- return;
+ return (NOT_PNG);
}
@@ -913,19 +913,21 @@
use by the error functions, if necessary (the pointer and functions can
be NULL if the default error handlers are to be used). See the section
on Changes to Libpng below regarding the old initialization functions.
+The structure allocation functions quietly return NULL if they fail to
+create the structure, so your application should check for that.
png_structp png_ptr = png_create_read_struct
(PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
user_error_fn, user_warning_fn);
if (!png_ptr)
- return;
+ return (ERROR);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr,
(png_infopp)NULL, (png_infopp)NULL);
- return;
+ return (ERROR);
}
png_infop end_info = png_create_info_struct(png_ptr);
@@ -933,7 +935,7 @@
{
png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL);
- return;
+ return (ERROR);
}
If you want to use your own memory allocation routines,
@@ -968,7 +970,7 @@
png_destroy_read_struct(&png_ptr, &info_ptr,
&end_info);
fclose(fp);
- return;
+ return (ERROR);
}
If you would rather avoid the complexity of setjmp/longjmp issues,
@@ -2031,20 +2033,20 @@
(PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
user_error_fn, user_warning_fn);
if (!png_ptr)
- return -1;
+ return (ERROR);
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr, (png_infopp)NULL,
(png_infopp)NULL);
- return -1;
+ return (ERROR);
}
if (setjmp(png_jmpbuf(png_ptr)))
{
png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL);
- return -1;
+ return (ERROR);
}
/* This one's new. You can provide functions
@@ -2078,7 +2080,7 @@
{
png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL);
- return -1;
+ return (ERROR);
}
/* This one's new also. Simply give it a chunk
@@ -2192,7 +2194,7 @@
FILE *fp = fopen(file_name, "wb");
if (!fp)
{
- return;
+ return (ERROR);
}
Next, png_struct and png_info need to be allocated and initialized.
@@ -2207,14 +2209,14 @@
(PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
user_error_fn, user_warning_fn);
if (!png_ptr)
- return;
+ return (ERROR);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr,
(png_infopp)NULL);
- return;
+ return (ERROR);
}
If you want to use your own memory allocation routines,
@@ -2239,9 +2241,9 @@
if (setjmp(png_jmpbuf(png_ptr)))
{
- png_destroy_write_struct(&png_ptr, &info_ptr);
- fclose(fp);
- return;
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ fclose(fp);
+ return (ERROR);
}
...
return;
@@ -3377,13 +3379,13 @@
.SH VII. Y2K Compliance in libpng
-May 17, 2000
+May 29, 2000
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.0.7beta14 are Y2K compliant. It is my belief that earlier
+upward through 1.0.7beta15 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that
@@ -3524,7 +3526,7 @@
Thanks to Frank J. T. Wojcik for helping with the documentation.
-Libpng version 1.0.7beta14 - May 17, 2000:
+Libpng version 1.0.7beta15 - May 29, 2000:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (randeg@alum.rpi.edu).
@@ -3539,7 +3541,7 @@
Copyright (c) 1996, 1997 Andreas Dilger
(libpng versions 0.89c, May 1996, through 0.96, May 1997)
Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
-(libpng versions 0.97, January 1998, through 1.0.7beta14, May 17, 2000)
+(libpng versions 0.97, January 1998, through 1.0.7beta15, May 29, 2000)
For the purposes of this copyright and license, "Contributing Authors"
is defined as the following set of individuals: