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[master] Imported from libpng-1.6.11.tar

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Glenn Randers-Pehrson
2014-06-05 09:53:19 -05:00
parent 1cc02f0395
commit d21eae44e7
85 changed files with 1020 additions and 894 deletions
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115
png.c
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@@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
* Last changed in libpng 1.6.9 [February 6, 2014]
* Last changed in libpng 1.6.11 [June 5, 2014]
* Copyright (c) 1998-2014 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.)
@@ -14,7 +14,7 @@
#include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */
typedef png_libpng_version_1_6_10 Your_png_h_is_not_version_1_6_10;
typedef png_libpng_version_1_6_11 Your_png_h_is_not_version_1_6_11;
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
@@ -165,7 +165,7 @@ png_calculate_crc(png_structrp png_ptr, png_const_bytep ptr, png_size_t length)
int
png_user_version_check(png_structrp png_ptr, png_const_charp user_png_ver)
{
if (user_png_ver)
if (user_png_ver != NULL)
{
int i = 0;
@@ -773,13 +773,13 @@ png_get_copyright(png_const_structrp png_ptr)
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
"libpng version 1.6.10 - March 6, 2014" PNG_STRING_NEWLINE \
"libpng version 1.6.11 - June 5, 2014" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
return "libpng version 1.6.10 - March 6, 2014\
return "libpng version 1.6.11 - June 5, 2014\
Copyright (c) 1998-2014 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -1558,10 +1558,10 @@ png_colorspace_check_xy(png_XYZ *XYZ, const png_xy *xy)
/* As a side-effect this routine also returns the XYZ endpoints. */
result = png_XYZ_from_xy(XYZ, xy);
if (result) return result;
if (result != 0) return result;
result = png_xy_from_XYZ(&xy_test, XYZ);
if (result) return result;
if (result != 0) return result;
if (png_colorspace_endpoints_match(xy, &xy_test,
5/*actually, the math is pretty accurate*/))
@@ -1581,10 +1581,10 @@ png_colorspace_check_XYZ(png_xy *xy, png_XYZ *XYZ)
png_XYZ XYZtemp;
result = png_XYZ_normalize(XYZ);
if (result) return result;
if (result != 0) return result;
result = png_xy_from_XYZ(xy, XYZ);
if (result) return result;
if (result != 0) return result;
XYZtemp = *XYZ;
return png_colorspace_check_xy(&XYZtemp, xy);
@@ -1625,7 +1625,7 @@ png_colorspace_set_xy_and_XYZ(png_const_structrp png_ptr,
}
/* Only overwrite with preferred values */
if (!preferred)
if (preferred == 0)
return 1; /* ok, but no change */
}
@@ -1906,10 +1906,6 @@ png_icc_check_length(png_const_structrp png_ptr, png_colorspacerp colorspace,
return png_icc_profile_error(png_ptr, colorspace, name, profile_length,
"too short");
if (profile_length & 3)
return png_icc_profile_error(png_ptr, colorspace, name, profile_length,
"invalid length");
return 1;
}
@@ -1930,6 +1926,11 @@ png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace,
return png_icc_profile_error(png_ptr, colorspace, name, temp,
"length does not match profile");
temp = (png_uint_32) (*(profile+8));
if (temp > 3 && (profile_length & 3))
return png_icc_profile_error(png_ptr, colorspace, name, profile_length,
"invalid length");
temp = png_get_uint_32(profile+128); /* tag count: 12 bytes/tag */
if (temp > 357913930 || /* (2^32-4-132)/12: maximum possible tag count */
profile_length < 132+12*temp) /* truncated tag table */
@@ -2044,7 +2045,7 @@ png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace,
"invalid embedded Abstract ICC profile");
case 0x6C696E6B: /* 'link' */
/* DeviceLink profiles cannnot be interpreted in a non-device specific
/* DeviceLink profiles cannot be interpreted in a non-device specific
* fashion, if an app uses the AToB0Tag in the profile the results are
* undefined unless the result is sent to the intended device,
* therefore a DeviceLink profile should not be found embedded in a
@@ -2055,7 +2056,7 @@ png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace,
case 0x6E6D636C: /* 'nmcl' */
/* A NamedColor profile is also device specific, however it doesn't
* contain an AToB0 tag that is open to misintrepretation. Almost
* contain an AToB0 tag that is open to misinterpretation. Almost
* certainly it will fail the tests below.
*/
(void)png_icc_profile_error(png_ptr, NULL, name, temp,
@@ -2136,7 +2137,7 @@ png_icc_check_tag_table(png_const_structrp png_ptr, png_colorspacerp colorspace,
return 1; /* success, maybe with warnings */
}
#ifdef PNG_sRGB_SUPPORTED
#if defined(PNG_sRGB_SUPPORTED) && PNG_sRGB_PROFILE_CHECKS >= 0
/* Information about the known ICC sRGB profiles */
static const struct
{
@@ -2210,11 +2211,18 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
* by sRGB (but maybe defined by a later ICC specification) the read of
* the profile will fail at that point.
*/
/* First see if PNG_SKIP_sRGB_CHECK_PROFILE has been set to "on" */
if (((png_ptr->options >> PNG_SKIP_sRGB_CHECK_PROFILE) & 3) ==
PNG_OPTION_ON)
return 0;
png_uint_32 length = 0;
png_uint_32 intent = 0x10000; /* invalid */
#if PNG_sRGB_PROFILE_CHECKS > 1
uLong crc = 0; /* the value for 0 length data */
#endif
unsigned int i;
for (i=0; i < (sizeof png_sRGB_checks) / (sizeof png_sRGB_checks[0]); ++i)
@@ -2294,7 +2302,6 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
return 1+png_sRGB_checks[i].is_broken;
}
}
}
# if PNG_sRGB_PROFILE_CHECKS > 0
/* The signature matched, but the profile had been changed in some
@@ -2306,6 +2313,7 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
PNG_CHUNK_WARNING);
break;
# endif
}
}
}
@@ -2321,7 +2329,9 @@ png_icc_set_sRGB(png_const_structrp png_ptr,
/* Is this profile one of the known ICC sRGB profiles? If it is, just set
* the sRGB information.
*/
#if PNG_sRGB_PROFILE_CHECKS >= 0
if (png_compare_ICC_profile_with_sRGB(png_ptr, profile, adler))
#endif
(void)png_colorspace_set_sRGB(png_ptr, colorspace,
(int)/*already checked*/png_get_uint_32(profile+64));
}
@@ -2435,45 +2445,46 @@ png_check_IHDR(png_const_structrp png_ptr,
png_warning(png_ptr, "Image width is zero in IHDR");
error = 1;
}
else if (width > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image width in IHDR");
error = 1;
}
else
{
# ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (width > png_ptr->user_width_max)
# else
if (width > PNG_USER_WIDTH_MAX)
# endif
{
png_warning(png_ptr, "Image width exceeds user limit in IHDR");
error = 1;
}
}
if (height == 0)
{
png_warning(png_ptr, "Image height is zero in IHDR");
error = 1;
}
# ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (width > png_ptr->user_width_max)
# else
if (width > PNG_USER_WIDTH_MAX)
# endif
{
png_warning(png_ptr, "Image width exceeds user limit in IHDR");
error = 1;
}
# ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (height > png_ptr->user_height_max)
# else
if (height > PNG_USER_HEIGHT_MAX)
# endif
{
png_warning(png_ptr, "Image height exceeds user limit in IHDR");
error = 1;
}
if (width > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image width in IHDR");
error = 1;
}
if (height > PNG_UINT_31_MAX)
else if (height > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image height in IHDR");
error = 1;
}
else
{
# ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (height > png_ptr->user_height_max)
# else
if (height > PNG_USER_HEIGHT_MAX)
# endif
{
png_warning(png_ptr, "Image height exceeds user limit in IHDR");
error = 1;
}
}
/* Check other values */
if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
@@ -2738,7 +2749,7 @@ png_pow10(int power)
}
while (power > 0);
if (recip) d = 1/d;
if (recip != 0) d = 1/d;
}
/* else power is 0 and d is 1 */
@@ -3261,7 +3272,7 @@ png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
if (s00 >= (D >> 1))
++result;
if (negative)
if (negative != 0)
result = -result;
/* Check for overflow. */
@@ -3788,7 +3799,7 @@ png_build_16bit_table(png_structrp png_ptr, png_uint_16pp *ptable,
double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5);
sub_table[j] = (png_uint_16)d;
# else
if (shift)
if (shift != 0)
ig = (ig * 65535U + max_by_2)/max;
sub_table[j] = png_gamma_16bit_correct(ig, gamma_val);
@@ -3804,7 +3815,7 @@ png_build_16bit_table(png_structrp png_ptr, png_uint_16pp *ptable,
{
png_uint_32 ig = (j << (8-shift)) + i;
if (shift)
if (shift != 0)
ig = (ig * 65535U + max_by_2)/max;
sub_table[j] = (png_uint_16)ig;
@@ -4092,7 +4103,7 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
}
#endif /* READ_GAMMA */
/* HARDWARE OPTION SUPPORT */
/* HARDWARE OR SOFTWARE OPTION SUPPORT */
#ifdef PNG_SET_OPTION_SUPPORTED
int PNGAPI
png_set_option(png_structrp png_ptr, int option, int onoff)