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Imported from libpng-1.0.7beta15.tar

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This commit is contained in:
Glenn Randers-Pehrson
2000-05-29 08:58:03 -05:00
parent fc4a143ec6
commit 104622bebb
49 changed files with 1368 additions and 267 deletions
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56
libpng.3
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@@ -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 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta14
\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 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta14
\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 @@ Following is a copy of the libpng.txt file that accompanies libpng.
.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 @@ Customizing libpng.
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 @@ pointers to error handling functions, and a pointer to a data struct for
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 @@ on Changes to Libpng below regarding the old initialization functions.
{
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 @@ free any memory.
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_infop info_ptr;
(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_infop info_ptr;
{
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 @@ custom writing functions. See the discussion under Customizing libpng.
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 @@ both "png_ptr"; you can call them anything you like, such as
(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 @@ section below for more information on the libpng error handling.
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 @@ application:
.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 @@ possible without all of you.
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) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
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: