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[libpng10] Imported from libpng-1.0.13.tar

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This commit is contained in:
Glenn Randers-Pehrson
2002-04-15 09:19:46 -05:00
parent e68f5a361b
commit 80b4f15ae3
104 changed files with 3675 additions and 11492 deletions
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114
pngwrite.c
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@@ -1,9 +1,9 @@
/* pngwrite.c - general routines to write a PNG file
*
* libpng 1.0.12beta1 - May 14, 2001
* libpng 1.0.13 - April 15, 2002
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2001 Glenn Randers-Pehrson
* Copyright (c) 1998-2002 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*/
@@ -424,7 +424,7 @@ png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr,
{
#ifdef PNG_USER_MEM_SUPPORTED
return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn,
warn_fn, NULL, NULL, NULL));
warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL));
}
/* Alternate initialize png_ptr structure, and allocate any memory needed */
@@ -443,14 +443,19 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
int i;
png_debug(1, "in png_create_write_struct\n");
#ifdef PNG_USER_MEM_SUPPORTED
if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
(png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr)) == NULL)
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
(png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
#else
if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
#endif /* PNG_USER_MEM_SUPPORTED */
{
return ((png_structp)NULL);
}
if (png_ptr == NULL)
return (NULL);
#if !defined(PNG_1_0_X)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
#endif
#endif /* PNG_1_0_X */
#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
@@ -462,7 +467,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_free(png_ptr, png_ptr->zbuf);
png_ptr->zbuf=NULL;
png_destroy_struct(png_ptr);
return ((png_structp)NULL);
return (NULL);
}
#ifdef USE_FAR_KEYWORD
png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
@@ -492,23 +497,24 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
(user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
(user_png_ver[0] == '0' && user_png_ver[2] < '9'))
{
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
char msg[80];
if (user_png_ver)
{
sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
user_png_ver);
png_warning(png_ptr, msg);
}
sprintf(msg, "Application is running with png.c from libpng-%.20s",
png_libpng_ver);
png_warning(png_ptr, msg);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags=0;
#endif
png_error(png_ptr,
"Incompatible libpng version in application and library");
}
/* Libpng 1.0.6 was not binary compatible, due to insertion of the
info_ptr->free_me member. Libpng-1.0.1 and earlier were not
compatible due to insertion of the user transform function. Note
to maintainer: this test can be removed from version 1.2.0 and
beyond because the previous test would have already rejected it. */
if (user_png_ver[0] == '1' && user_png_ver[2] == '0' &&
(user_png_ver[4] < '2' || user_png_ver[4] == '6') &&
user_png_ver[5] == '\0')
{
png_error(png_ptr,
"Application must be recompiled; versions <= 1.0.6 were incompatible");
}
}
/* initialize zbuf - compression buffer */
@@ -516,11 +522,12 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
png_set_write_fn(png_ptr, NULL, NULL, NULL);
png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
png_flush_ptr_NULL);
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
1, NULL, NULL);
1, png_doublep_NULL, png_doublep_NULL);
#endif
return ((png_structp)png_ptr);
@@ -532,7 +539,7 @@ void PNGAPI
png_write_init(png_structp png_ptr)
{
/* We only come here via pre-1.0.7-compiled applications */
png_write_init_2(png_ptr, "1.0.0", 0, 0);
png_write_init_2(png_ptr, "1.0.6 or earlier", 0, 0);
}
#undef png_write_init_2
@@ -541,17 +548,39 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
png_size_t png_struct_size, png_size_t png_info_size)
{
/* We only come here via pre-1.0.12-compiled applications */
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
if(sizeof(png_struct) > png_struct_size || sizeof(png_info) > png_info_size)
{
char msg[80];
png_ptr->warning_fn=NULL;
if (user_png_ver)
{
sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
user_png_ver);
png_warning(png_ptr, msg);
}
sprintf(msg, "Application is running with png.c from libpng-%.20s",
png_libpng_ver);
png_warning(png_ptr, msg);
}
#endif
if(sizeof(png_struct) > png_struct_size)
{
png_ptr->error_fn=(png_error_ptr)NULL;
png_ptr->error_fn=NULL;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags=0;
#endif
png_error(png_ptr,
"The png struct allocated by the application is too small.");
"The png struct allocated by the application for writing is too small.");
}
if(sizeof(png_info) > png_info_size)
{
png_ptr->error_fn=(png_error_ptr)NULL;
png_ptr->error_fn=NULL;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags=0;
#endif
png_error(png_ptr,
"The info struct allocated by the application is too small.");
"The info struct allocated by the application for writing is too small.");
}
png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
}
@@ -573,7 +602,7 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#ifdef PNG_LEGACY_SUPPORTED
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
#else
png_ptr->warning_fn=(png_error_ptr)NULL;
png_ptr->warning_fn=NULL;
png_warning(png_ptr,
"Application uses deprecated png_write_init() and should be recompiled.");
break;
@@ -598,12 +627,19 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
/* reset all variables to 0 */
png_memset(png_ptr, 0, sizeof (png_struct));
#if !defined(PNG_1_0_X)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
#endif
#endif /* PNG_1_0_X */
#ifdef PNG_SETJMP_SUPPORTED
/* restore jump buffer */
png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf));
#endif
png_set_write_fn(png_ptr, NULL, NULL, NULL);
png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
png_flush_ptr_NULL);
/* initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
@@ -612,7 +648,7 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
1, NULL, NULL);
1, png_doublep_NULL, png_doublep_NULL);
#endif
}
@@ -674,6 +710,11 @@ png_write_row(png_structp png_ptr, png_bytep row)
/* initialize transformations and other stuff if first time */
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
/* make sure we wrote the header info */
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
png_error(png_ptr,
"png_write_info was never called before png_write_row.");
/* check for transforms that have been set but were defined out */
#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED)
if (png_ptr->transformations & PNG_INVERT_MONO)
@@ -912,6 +953,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
png_ptr = *png_ptr_ptr;
#ifdef PNG_USER_MEM_SUPPORTED
free_fn = png_ptr->free_fn;
mem_ptr = png_ptr->mem_ptr;
#endif
}
@@ -937,7 +979,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
#else
png_destroy_struct((png_voidp)info_ptr);
#endif
*info_ptr_ptr = (png_infop)NULL;
*info_ptr_ptr = NULL;
}
if (png_ptr != NULL)
@@ -949,7 +991,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
*png_ptr_ptr = (png_structp)NULL;
*png_ptr_ptr = NULL;
}
}