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[master] Reverted iTXt compatibility stuff

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from 1.2.41beta05, 1.2.41beta11, and 1.2.41beta12.
This commit is contained in:
Glenn Randers-Pehrson
2009-11-08 16:51:11 -06:00
parent 87480bf6d4
commit f748fda0ed
16 changed files with 35 additions and 434 deletions
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39
pngread.c
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@@ -1,7 +1,7 @@
/* pngread.c - read a PNG file
*
* Last changed in libpng 1.2.41 [November 3, 2009]
* Last changed in libpng 1.2.41 [November 8, 2009]
* Copyright (c) 1998-2009 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.)
@@ -66,8 +66,6 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
/* Added at libpng-1.2.41 */
png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
#endif
#ifdef PNG_SETJMP_SUPPORTED
@@ -118,10 +116,6 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
* For versions after libpng 1.0, we will be compatible, so we need
* only check the first digit.
*/
#ifdef PNG_iTXt_SUPPORTED
png_size_t length;
#endif
if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
(user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
(user_png_ver[0] == '0' && user_png_ver[2] < '9'))
@@ -146,26 +140,6 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_error(png_ptr,
"Incompatible libpng version in application and library");
}
#ifdef PNG_iTXt_SUPPORTED
/* Any library mismatch is trouble for png_set_read() in
* libpng-1.2.41 and later 1.2.x, so we store the caller's
* library version string.
*/
length = (png_size_t)png_strlen(user_png_ver) + 1;
png_debug1(3, "allocating user_png_ver for png_ptr (%lu bytes)",
(unsigned long)length);
png_ptr->user_png_ver = (png_charp)png_malloc_warn(png_ptr,
(png_uint_32)length);
if (png_ptr->user_png_ver == NULL)
png_warning(png_ptr, "Could not store png_ptr->user_png_ver");
else
png_memcpy(png_ptr->user_png_ver, user_png_ver, length);
#endif /* PNG_iTXt_SUPPORTED */
}
/* Initialize zbuf - compression buffer */
@@ -327,8 +301,6 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
/* Added at libpng-1.2.41 */
png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
#endif
/* Initialize zbuf - compression buffer */
@@ -377,10 +349,6 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
png_size_t num_checked = png_ptr->sig_bytes,
num_to_check = 8 - num_checked;
#ifdef PNG_IO_STATE_SUPPORTED
png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE;
#endif
png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
png_ptr->sig_bytes = 8;
@@ -1325,11 +1293,6 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
#endif /* PNG_TEXT_SUPPORTED */
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
/* New member added in libpng-1.2.41, will be removed from 1.4.0 */
#ifdef PNG_iTXt_SUPPORTED
png_free(png_ptr, png_ptr->user_png_ver);
#endif
/* Save the important info out of the png_struct, in case it is
* being used again.
*/