minecraft-pi-reborn/libpng
Archived
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Imported from libpng-0.99a.tar

Browse Source
This commit is contained in:
Glenn Randers-Pehrson 1998-01-31 20:07:59 -06:00
parent 46f61e2398
commit b212002101
21 changed files with 92 additions and 88 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
CHANGES
View File

@ -200,7 +200,7 @@ version 0.98 [January, 1998]
PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
changed srgb_intent from png_byte to int to avoid compiler bugs
version 0.99 [January, 1998]
version 0.99 [January 30, 1998]
free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
fixed a longstanding "packswap" bug in pngtrans.c
fixed some inconsistencies in pngconf.h that prevented compiling with
@ -213,3 +213,6 @@ version 0.99 [January, 1998]
added TARGET_MACOS similar to zlib-1.0.8
define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
added type casting to all png_malloc() function calls
version 0.99a [January 31, 1998]
added type casts and parentheses to all returns that return a value.(Tim W.)

2
README
View File

@ -1,4 +1,4 @@
[NOTE: this is still beta version 0.99; the text below has already
[NOTE: this is still beta version 0.99a; the text below has already
been updated in anticipation of the imminent 1.0 release.]

4
libpng.txt
View File

@ -1,9 +1,9 @@
libpng.txt - a description on how to use and modify libpng
libpng version 0.99
libpng version 0.99a
Updated and distributed by Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
Copyright (c) 1998, Glenn Randers-Pehrson
January 30, 1998
January 31, 1998
based on:

20
png.c
View File

@ -1,12 +1,12 @@
/* png.c - location for general purpose libpng functions
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
#define PNG_INTERNAL
@ -16,7 +16,7 @@
/* Version information for C files. This had better match the version
* string defined in png.h.
*/
char png_libpng_ver[5] = "0.99";
char png_libpng_ver[6] = "0.99";
/* Place to hold the signature string for a PNG file. */
png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
@ -103,15 +103,15 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
if (num_to_check > 8)
num_to_check = 8;
else if (num_to_check < 1)
return 0;
return (0);
if (start > 7)
return 0;
return (0);
if (start + num_to_check > 8)
num_to_check = 8 - start;
return (png_memcmp(&sig[start], &png_sig[start], num_to_check));
return ((int)(png_memcmp(&sig[start], &png_sig[start], num_to_check)));
}
/* (Obsolete) function to check signature bytes. It does not allow one
@ -121,7 +121,7 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
int
png_check_sig(png_bytep sig, int num)
{
return !png_sig_cmp(sig, (png_size_t)0, (png_size_t)num);
return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
}
/* Function to allocate memory for zlib. */
@ -143,7 +143,7 @@ png_zalloc(voidpf png_ptr, uInt items, uInt size)
{
png_memset(ptr, 0, (png_size_t)num_bytes);
}
return (voidpf)(ptr);
return ((voidpf)ptr);
}
/* function to free memory for zlib */
@ -205,7 +205,7 @@ png_create_info_struct(png_structp png_ptr)
png_info_init(info_ptr);
}
return info_ptr;
return (info_ptr);
}
/* This function frees the memory associated with a single info struct.
@ -286,7 +286,7 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
png_voidp
png_get_io_ptr(png_structp png_ptr)
{
return png_ptr->io_ptr;
return (png_ptr->io_ptr);
}
#if !defined(PNG_NO_STDIO)

5
png.h
View File

@ -1,12 +1,12 @@
/* png.h - header file for PNG reference library
*
* libpng 0.99 beta
* libpng 0.99a beta
* 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
* January 30, 1998
* January 31, 1998
*
* Note about libpng version numbers:
*
@ -27,6 +27,7 @@
* 0.97c 0.97 2.0.97
* 0.98 0.98 2.0.98
* 0.99 0.99 2.0.99
* 0.99a 0.99 2.0.99
* 1.0 1.00 2.1.0
*
* Henceforth the source version will match the shared-library minor

4
pngconf.h
View File

@ -1,12 +1,12 @@
/* pngconf.c - machine configurable file for libpng
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
/* Any machine specific code is near the front of this file, so if you

6
pngerror.c
View File

@ -1,12 +1,12 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* This file provides a location for all error handling. Users which
* need special error handling are expected to write replacement functions
@ -167,7 +167,7 @@ png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
png_voidp
png_get_error_ptr(png_structp png_ptr)
{
return png_ptr->error_ptr;
return ((png_voidp)png_ptr->error_ptr);
}

12
pngget.c
View File

@ -1,12 +1,12 @@
/* pngget.c - retrieval of values from info struct
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
#define PNG_INTERNAL
@ -126,14 +126,14 @@ png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
if (info_ptr->x_pixels_per_unit == 0)
return NULL;
return (0.0);
else
return (float)info_ptr->y_pixels_per_unit
/(float)info_ptr->x_pixels_per_unit;
return ((float)info_ptr->y_pixels_per_unit
/(float)info_ptr->x_pixels_per_unit);
}
else
#endif
return (0);
return (0.0);
}
png_uint_32

16
pngmem.c
View File

@ -1,11 +1,11 @@
/* pngmem.c - stub functions for memory allocation
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* This file provides a location for all memory allocation. Users which
* need special memory handling are expected to modify the code in this file
@ -42,7 +42,7 @@ png_create_struct(int type)
else if (type == PNG_STRUCT_PNG)
size = sizeof(png_struct);
else
return (png_voidp)NULL;
return ((png_voidp)NULL);
if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL)
{
@ -88,7 +88,7 @@ PNG_MALLOC(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
if (png_ptr == NULL || size == 0)
return ((voidp)NULL);
return ((png_voidp)NULL);
#ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
@ -177,7 +177,7 @@ PNG_MALLOC(png_structp png_ptr, png_uint_32 size)
png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
}
return ret;
return (ret);
}
/* free a pointer allocated by PNG_MALLOC(). In the default
@ -234,7 +234,7 @@ png_create_struct(int type)
else if (type == PNG_STRUCT_PNG)
size = sizeof(png_struct);
else
return (png_voidp)NULL;
return ((png_voidp)NULL);
#if defined(__TURBOC__) && !defined(__FLAT__)
if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL)
@ -286,7 +286,7 @@ PNG_MALLOC(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
if (png_ptr == NULL || size == 0)
return (NULL);
return ((png_voidp)NULL);
#ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
@ -308,7 +308,7 @@ PNG_MALLOC(png_structp png_ptr, png_uint_32 size)
png_error(png_ptr, "Out of Memory");
}
return ret;
return (ret);
}
/* Free a pointer allocated by PNG_MALLOC(). In the default

4
pngpread.c
View File

@ -1,12 +1,12 @@
/* pngpread.c - read a png file in push mode
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
#define PNG_INTERNAL

4
pngread.c
View File

@ -1,12 +1,12 @@
/* pngread.c - read a PNG file
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* This file contains routines that an application calls directly to
* read a PNG file or stream.

4
pngrio.c
View File

@ -1,12 +1,12 @@
/* pngrio.c - functions for data input
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* This file provides a location for all input. Users which need
* special handling are expected to write a function which has the same

4
pngrtran.c
View File

@ -1,12 +1,12 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* This file contains functions optionally called by an application
* in order to tell libpng how to handle data when reading a PNG.

18
pngrutil.c
View File

@ -1,12 +1,12 @@
/* pngrutil.c - utilities to read a PNG file
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* This file contains routines which are only called from within
* libpng itself during the course of reading an image.
@ -27,7 +27,7 @@ png_get_uint_32(png_bytep buf)
((png_uint_32)(*(buf + 2)) << 8) +
(png_uint_32)(*(buf + 3));
return i;
return (i);
}
#if defined(PNG_READ_pCAL_SUPPORTED)
@ -44,7 +44,7 @@ png_get_int_32(png_bytep buf)
((png_int_32)(*(buf + 2)) << 8) +
(png_int_32)(*(buf + 3));
return i;
return (i);
}
#endif /* PNG_READ_pCAL_SUPPORTED */
@ -57,7 +57,7 @@ png_get_uint_16(png_bytep buf)
i = (png_uint_16)(((png_uint_16)(*buf) << 8) +
(png_uint_16)(*(buf + 1)));
return i;
return (i);
}
#endif /* PNG_READ_BIG_ENDIAN_SUPPORTED */
@ -100,10 +100,10 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
{
png_chunk_error(png_ptr, "CRC error");
}
return 1;
return (1);
}
return 0;
return (0);
}
/* Compare the CRC stored in the PNG file with that calculated by libpng from
@ -132,10 +132,10 @@ png_crc_error(png_structp png_ptr)
if (need_crc)
{
crc = png_get_uint_32(crc_bytes);
return (crc != png_ptr->crc);
return ((int)(crc != png_ptr->crc));
}
else
return 0;
return (0);
}

4
pngset.c
View File

@ -1,12 +1,12 @@
/* pngset.c - storage of image information into info struct
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* The functions here are used during reads to store data from the file
* into the info struct, and during writes to store application data

32
pngtest.c
View File

@ -1,12 +1,12 @@
/* pngtest.c - a simple test program to test libpng
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 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
@ -281,10 +281,10 @@ 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;
return (NULL);
}
if (size == 0)
return NULL;
return (NULL);
/* This calls the library allocator twice, once to get the requested
buffer and once to get a new free list entry. */
@ -299,7 +299,7 @@ png_malloc(png_structp png_ptr, png_uint_32 size) {
pinformation = pinfo;
/* Make sure the caller isn't assuming zeroed memory. */
png_memset(pinfo->pointer, 0xdd, pinfo->size);
return pinfo->pointer;
return ((png_voidp)pinfo->pointer);
}
}
@ -369,14 +369,14 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
if ((fpin = fopen(inname, "rb")) == NULL)
{
fprintf(STDERR, "Could not find input file %s\n", inname);
return 1;
return (1);
}
if ((fpout = fopen(outname, "wb")) == NULL)
{
fprintf(STDERR, "Could not open output file %s\n", outname);
fclose(fpin);
return 1;
return (1);
}
png_debug(0, "Allocating read and write structures\n");
@ -409,7 +409,7 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
png_destroy_write_struct(&write_ptr, &write_info_ptr);
fclose(fpin);
fclose(fpout);
return 1;
return (1);
}
png_debug(0, "Setting jmpbuf for write struct\n");
@ -425,7 +425,7 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
png_destroy_write_struct(&write_ptr, &write_info_ptr);
fclose(fpin);
fclose(fpout);
return 1;
return (1);
}
#ifdef USE_FAR_KEYWORD
@ -621,7 +621,7 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
png_destroy_write_struct(&write_ptr, &write_info_ptr);
fclose(fpin);
fclose(fpout);
return 1;
return (1);
}
num_pass = png_set_interlace_handling(read_ptr);
@ -663,14 +663,14 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
if ((fpin = fopen(inname, "rb")) == NULL)
{
fprintf(STDERR, "Could not find file %s\n", inname);
return 1;
return (1);
}
if ((fpout = fopen(outname, "rb")) == NULL)
{
fprintf(STDERR, "Could not find file %s\n", outname);
fclose(fpin);
return 1;
return (1);
}
while (1)
@ -686,7 +686,7 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
inname, outname);
fclose(fpin);
fclose(fpout);
return 1;
return (1);
}
if (!num_in)
@ -697,14 +697,14 @@ int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
fprintf(STDERR, "Files %s and %s are different\n", inname, outname);
fclose(fpin);
fclose(fpout);
return 1;
return (1);
}
}
fclose(fpin);
fclose(fpout);
return 0;
return (0);
}
/* input and output filenames */
@ -867,5 +867,5 @@ main(int argc, char *argv[])
fprintf(STDERR, "libpng passes test\n");
else
fprintf(STDERR, "libpng FAILS test\n");
return ierror != 0;
return ((int)(ierror != 0));
}

8
pngtrans.c
View File

@ -1,12 +1,12 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
#define PNG_INTERNAL
@ -77,10 +77,10 @@ png_set_interlace_handling(png_structp png_ptr)
if (png_ptr->interlaced)
{
png_ptr->transformations |= PNG_INTERLACE;
return 7;
return (7);
}
return 1;
return (1);
}
#endif

4
pngwio.c
View File

@ -1,12 +1,12 @@
/* pngwio.c - functions for data output
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*
* This file provides a location for all output. Users which need
* special handling are expected to write functions which have the same

12
pngwrite.c
View File

@ -1,12 +1,12 @@
/* pngwrite.c - general routines to write a PNG file
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
/* get internal access to png.h */
@ -249,7 +249,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
#endif
return png_ptr->time_buffer;
return ((png_charp)png_ptr->time_buffer);
}
#endif /* PNG_TIME_RFC1123_SUPPORTED */
@ -289,7 +289,7 @@ png_create_write_struct(png_const_charp user_png_ver, voidp error_ptr,
png_debug(1, "in png_create_write_struct\n");
if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
{
return (png_structp)NULL;
return ((png_structp)NULL);
}
#ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf))
@ -299,7 +299,7 @@ png_create_write_struct(png_const_charp user_png_ver, voidp error_ptr,
{
png_free(png_ptr, png_ptr->zbuf);
png_destroy_struct(png_ptr);
return (png_structp)NULL;
return ((png_structp)NULL);
}
#ifdef USE_FAR_KEYWORD
png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
@ -329,7 +329,7 @@ png_create_write_struct(png_const_charp user_png_ver, voidp error_ptr,
1, NULL, NULL);
#endif
return (png_ptr);
return ((png_structp)png_ptr);
}

4
pngwtran.c
View File

@ -1,12 +1,12 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
#define PNG_INTERNAL

8
pngwutil.c
View File

@ -1,12 +1,12 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng 0.99
* libpng 0.99a
* 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
* January 30, 1998
* January 31, 1998
*/
#define PNG_INTERNAL
@ -599,7 +599,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
if (key == NULL || (key_len = png_strlen(key)) == 0)
{
png_chunk_warning(png_ptr, "zero length keyword");
return 0;
return ((png_size_t)0);
}
png_debug1(2, "Keyword to be checked is '%s'\n", key);
@ -688,7 +688,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
key_len = 79;
}
return key_len;
return (key_len);
}
#endif