mewin/libpng
1
0
Fork 0
mirror of https://git.code.sf.net/p/libpng/code.git synced 2025-07-10 18:04:09 +02:00
Code Issues Projects Releases Wiki Activity

[devel] Implemented remaining "_fixed" functions and corrected warnings

Browse Source 
that were recently introduced, mostly resulting from
safe but uncast assignments to shorter integers.  Also added a zlib
VStudio release library project because the latest zlib Official Windows
build does not include such a thing.
This commit is contained in:
Glenn Randers-Pehrson 2010-07-31 06:34:36 -05:00
parent 459432a1b8
commit 4009a76e97
17 changed files with 422 additions and 154 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
ANNOUNCE
View File

@ -1,5 +1,5 @@
Libpng 1.5.0beta38 - July 30, 2010
Libpng 1.5.0beta38 - July 31, 2010
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@ -226,7 +226,7 @@ version 1.5.0beta24 [May 7, 2010]
offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
Added more blank lines for readability.
version 1.5.0beta25 [July 30, 2010]
version 1.5.0beta25 [July 31, 2010]
In pngpread.c: png_push_have_row() add check for new_row > height
Removed the now-redundant check for out-of-bounds new_row from example.c
@ -315,7 +315,12 @@ version 1.5.0beta37 [July 30, 2010]
a compiler warning.
Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
version 1.5.0beta38 [July 30, 2010]
version 1.5.0beta38 [July 31, 2010]
Implemented remaining "_fixed" functions.
Corrected a number of recently introduced warnings mostly resulting from
safe but uncast assignments to shorter integers. Also added a zlib
VStudio release library project because the latest zlib Official Windows
build does not include such a thing.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
(subscription required; visit

7
CHANGES
View File

@ -2797,7 +2797,12 @@ version 1.5.0beta37 [July 30, 2010]
a compiler warning.
Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
version 1.5.0beta38 [July 30, 2010]
version 1.5.0beta38 [July 31, 2010]
Implemented remaining "_fixed" functions.
Corrected a number of recently introduced warnings mostly resulting from
safe but uncast assignments to shorter integers. Also added a zlib
VStudio release library project because the latest zlib Official Windows
build does not include such a thing.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

116
png.c
View File

@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
* Last changed in libpng 1.5.0 [July 30, 2010]
* Last changed in libpng 1.5.0 [July 31, 2010]
* Copyright (c) 1998-2010 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.)
@ -560,13 +560,13 @@ png_get_copyright(png_structp png_ptr)
#else
# ifdef __STDC__
return ((png_charp) PNG_STRING_NEWLINE \
"libpng version 1.5.0beta38 - July 30, 2010" PNG_STRING_NEWLINE \
"libpng version 1.5.0beta38 - July 31, 2010" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2010 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 ((png_charp) "libpng version 1.5.0beta38 - July 30, 2010\
return ((png_charp) "libpng version 1.5.0beta38 - July 31, 2010\
Copyright (c) 1998-2010 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
@ -1289,7 +1289,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
if (exp == 0) *ascii++ = 46, --size; /* counted above */
--exp;
}
*ascii++ = 48 + (int)d, ++cdigits;
*ascii++ = (char)(48 + (int)d), ++cdigits;
}
}
while (cdigits+czero-clead < (int)precision && fp > DBL_MIN);
@ -1379,6 +1379,79 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
}
# endif /* FLOATING_POINT */
# ifdef PNG_FIXED_POINT_SUPPORTED
/* Function to format a fixed point value in ASCII.
*/
void /* PRIVATE */
png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size,
png_fixed_point fp)
{
/* Require space for 10 decimal digits, a decimal point, a minus sign and a
* trailing \0, 13 characters:
*/
if (size > 12)
{
png_uint_32 num;
/* Avoid overflow here on the minimum integer. */
if (fp < 0)
*ascii++ = 45, --size, num = -fp;
else
num = fp;
if (num <= 0x80000000U) /* else overflowed */
{
unsigned ndigits = 0, first = 16/*flag value*/;
char digits[10];
while (num)
{
/* Split the low digit off num: */
unsigned tmp = num/10;
num -= tmp*10;
digits[ndigits++] = (char)(48 + num);
/* Record the first non-zero digit, note that this is a number
* starting at 1, it's not actually the array index.
*/
if (first == 16 && num > 0)
first = ndigits;
num = tmp;
}
if (ndigits > 0)
{
while (ndigits > 5) *ascii++ = digits[--ndigits];
/* The remaining digits are fractional digits, ndigits is '5' or
* smaller at this point. It is certainly not zero. Check for a
* non-zero fractional digit:
*/
if (first <= 5)
{
unsigned i;
*ascii++ = 46; /* decimal point */
/* ndigits may be <5 for small numbers, output leading zeros then
* ndigits digits to first:
*/
i = 5;
while (ndigits < i) *ascii++ = 48, --i;
while (ndigits >= first) *ascii++ = digits[--ndigits];
/* Don't output the trailing zeros! */
}
}
else
*ascii++ = 48;
/* And null terminate the string: */
*ascii = 0;
return;
}
}
/* Here on buffer too small. */
png_error(png_ptr, "ASCII conversion buffer too small");
}
# endif /* FIXED_POINT */
#endif /* READ_SCAL */
#if defined(PNG_FLOATING_POINT_SUPPORTED) &&\
@ -1391,12 +1464,13 @@ png_fixed(png_structp png_ptr, double fp, png_const_charp text)
if (r <= 2147483647. && r >= -2147483648.)
return (png_fixed_point)r;
png_fixed_error(png_ptr, text, fp);
return 0;
png_fixed_error(png_ptr, text);
return 0; /*NOT REACHED*/
}
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED)
/* muldiv functions */
/* This API takes signed arguments and rounds the result to the nearest
* integer (or, for a fixed point number - the standard argument - to
@ -1945,13 +2019,13 @@ png_gamma_8bit_correct(unsigned value, png_fixed_point gamma)
if (png_muldiv(&res, gamma, log, PNG_FP_1))
return png_exp8bit(res);
# endif
/* Overflow. */
value = 0;
/* Overflow. */
value = 0;
# endif
}
return value;
return (png_byte)value;
}
png_uint_16
@ -1968,13 +2042,13 @@ png_gamma_16bit_correct(unsigned value, png_fixed_point gamma)
if (png_muldiv(&res, gamma, log, PNG_FP_1))
return png_exp16bit(res);
# endif
/* Overflow. */
value = 0;
/* Overflow. */
value = 0;
# endif
}
return value;
return (png_uint_16)value;
}
/* This does the right thing based on the bit_depth field of the
@ -2044,7 +2118,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
unsigned j;
for (j = 0; j < 256; j++)
{
png_uint_16 ig = (j << (8-shift)) + i;
png_uint_32 ig = (j << (8-shift)) + i;
# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
/* Inline the 'max' scaling operation: */
sub_table[j] = (png_uint_16)floor(65535*pow(ig/(double)max,
@ -2070,7 +2144,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
if (shift)
ig = (ig * 65535U + max_by_2)/max;
sub_table[j] = ig;
sub_table[j] = (png_uint_16)ig;
}
}
}
@ -2119,13 +2193,13 @@ png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable,
for (i = 0; i < 255; ++i) /* 8 bit output value */
{
/* Find the corresponding maximum input value */
png_uint_16 out = i * 257U; /* 16 bit output value */
png_uint_16 out = (png_uint_16)(i * 257U); /* 16 bit output value */
/* Find the boundary value in 16 bits: */
png_uint_16 bound = png_gamma_16bit_correct(out+128U, gamma);
/* Adjust (round) to (16-shift) bits: */
bound = (bound * max + 32768)/65535;
bound = (png_uint_16)(((png_uint_32)bound * max + 32768U)/65535U);
while (last <= bound)
{
@ -2156,8 +2230,8 @@ png_build_8bit_table(png_structp png_ptr, png_bytepp ptable,
if (png_gamma_significant(gamma)) for (i=0; i<256; i++)
table[i] = png_gamma_8bit_correct(i, gamma);
else for (i=0; i<245; ++i)
table[i] = i;
else for (i=0; i<256; ++i)
table[i] = (png_byte)i;
}
/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit

6
pngerror.c
View File

@ -1,7 +1,7 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* Last changed in libpng 1.5.0 [July 30, 2010]
* Last changed in libpng 1.5.0 [July 31, 2010]
* Copyright (c) 1998-2010 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.)
@ -240,7 +240,7 @@ png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message)
#ifdef PNG_ERROR_TEXT_SUPPORTED
#ifdef PNG_FLOATING_POINT_SUPPORTED
void
png_fixed_error(png_structp png_ptr, png_const_charp name, double value)
png_fixed_error(png_structp png_ptr, png_const_charp name)
{
# define fixed_message "fixed point overflow in "
# define fixed_message_ln ((sizeof fixed_message)-1)
@ -254,9 +254,7 @@ png_fixed_error(png_structp png_ptr, png_const_charp name, double value)
++iin;
}
msg[fixed_message_ln + iin] = 0;
/* To discover 'value' put a breakpoint here: */
png_error(png_ptr, msg);
value = value; /* Quiet the compiler */
}
#endif
#endif

31
pngget.c
View File

@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct
*
* Last changed in libpng 1.4.1 [July 30, 2010]
* Last changed in libpng 1.4.1 [July 31, 2010]
* Copyright (c) 1998-2010 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.)
@ -182,7 +182,7 @@ float PNGAPI
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
#ifdef PNG_READ_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs)
{
@ -202,6 +202,27 @@ png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
png_fixed_point PNGAPI
png_get_pixel_aspect_ratio_fixed(png_structp png_ptr, png_infop info_ptr)
{
#ifdef PNG_READ_pHYs_SUPPORTED
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)
&& info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0)
{
png_fixed_point res;
png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed");
if (png_muldiv(&res, info_ptr->y_pixels_per_unit, PNG_FP_1,
info_ptr->x_pixels_per_unit))
return res;
}
#endif
return 0;
}
#endif
png_int_32 PNGAPI
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
@ -728,6 +749,7 @@ png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
#ifdef PNG_sCAL_SUPPORTED
#ifdef PNG_FIXED_POINT_SUPPORTED
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
png_uint_32 PNGAPI
png_get_sCAL_fixed(png_structp png_ptr, png_infop info_ptr,
int *unit, png_fixed_point *width, png_fixed_point *height)
@ -736,7 +758,7 @@ png_get_sCAL_fixed(png_structp png_ptr, png_infop info_ptr,
(info_ptr->valid & PNG_INFO_sCAL))
{
*unit = info_ptr->scal_unit;
/*TODO: make this work */
/*TODO: make this work without FP support */
*width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width");
*height = png_fixed(png_ptr, atof(info_ptr->scal_s_height),
"sCAL height");
@ -745,7 +767,8 @@ png_get_sCAL_fixed(png_structp png_ptr, png_infop info_ptr,
return(0);
}
#endif
#endif /*FLOATING_ARITHMETIC*/
#endif /*FIXED_POINT*/
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_sCAL(png_structp png_ptr, png_infop info_ptr,

11
pngpread.c
View File

@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
* Last changed in libpng 1.5.0 [July 30, 2010]
* Last changed in libpng 1.5.0 [July 31, 2010]
* Copyright (c) 1998-2010 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.)
@ -1212,8 +1212,9 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
png_error(png_ptr, "Out of place tEXt");
info_ptr = info_ptr; /* To quiet some compiler warnings */
png_error(png_ptr, "Out of place tEXt");
/*NOT REACHED*/
}
#ifdef PNG_MAX_MALLOC_64K
@ -1308,8 +1309,9 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
png_error(png_ptr, "Out of place zTXt");
info_ptr = info_ptr; /* To quiet some compiler warnings */
png_error(png_ptr, "Out of place zTXt");
/*NOT REACHED*/
}
#ifdef PNG_MAX_MALLOC_64K
@ -1511,8 +1513,9 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
png_error(png_ptr, "Out of place iTXt");
info_ptr = info_ptr; /* To quiet some compiler warnings */
png_error(png_ptr, "Out of place iTXt");
/*NOT REACHED*/
}
#ifdef PNG_MAX_MALLOC_64K

6
pngrutil.c
View File

@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* Last changed in libpng 1.4.1 [July 30, 2010]
* Last changed in libpng 1.4.1 [July 31, 2010]
* Copyright (c) 1998-2010 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.)
@ -3074,8 +3074,8 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
}
default:
png_error(png_ptr, "Ignoring bad adaptive filter type");
*row = 0;
break;
/*NOT REACHED */
break;
}
}

32
pngset.c
View File

@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.5.0 [July 30, 2010]
* Last changed in libpng 1.5.0 [July 31, 2010]
* Copyright (c) 1998-2010 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.)
@ -318,11 +318,11 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
#endif
#ifdef PNG_sCAL_SUPPORTED
void PNGFAPI
void PNGAPI
png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
int unit, png_charp swidth, png_charp sheight)
{
png_size_t lengthw, lengthh;
png_size_t lengthw = 0, lengthh = 0;
png_debug1(1, "in %s storage function", "sCAL");
@ -407,6 +407,32 @@ png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width,
}
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
void PNGAPI
png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit,
png_fixed_point width, png_fixed_point height)
{
png_debug1(1, "in %s storage function", "sCAL");
/* Check the arguments. */
if (width <= 0)
png_warning(png_ptr, "Invalid sCAL width ignored");
else if (height <= 0)
png_warning(png_ptr, "Invalid sCAL height ignored");
else
{
/* Convert 'width' and 'height' to ASCII. */
char swidth[PNG_sCAL_MAX_DIGITS+1];
char sheight[PNG_sCAL_MAX_DIGITS+1];
png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width);
png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height);
png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
}
}
#endif
#endif
#ifdef PNG_pHYs_SUPPORTED

290
pngwrite.c
View File

@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file
*
* Last changed in libpng 1.5.0 [July 30, 2010]
* Last changed in libpng 1.5.0 [July 31, 2010]
* Copyright (c) 1998-2010 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.)
@ -447,6 +447,8 @@ png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr,
}
/* Alternate initialize png_ptr structure, and allocate any memory needed */
static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */
png_structp PNGAPI
png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
@ -574,8 +576,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_set_write_fn(png_ptr, NULL, NULL, NULL);
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
1, NULL, NULL);
png_reset_filter_heuristics(png_ptr);
#endif
return (png_ptr);
@ -999,9 +1000,8 @@ png_write_destroy(png_structp png_ptr)
#endif
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
png_free(png_ptr, png_ptr->prev_filters);
png_free(png_ptr, png_ptr->filter_weights);
png_free(png_ptr, png_ptr->inv_filter_weights);
/* Use this to save a little code space, it doesn't free the filter_costs */
png_reset_filter_heuristics(png_ptr);
png_free(png_ptr, png_ptr->filter_costs);
png_free(png_ptr, png_ptr->inv_filter_costs);
#endif
@ -1165,41 +1165,59 @@ png_set_filter(png_structp png_ptr, int method, int filters)
* better compression.
*/
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
void PNGAPI
png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int num_weights, png_doublep filter_weights,
png_doublep filter_costs)
/* Conveneince reset API. */
static void
png_reset_filter_heuristics(png_structp png_ptr)
{
int i;
/* Clear out any old values in the 'weights' - this must be done because if
* the app calls set_filter_heuristics multiple times with different
* 'num_weights' values we would otherwise potentially have wrong sized
* arrays.
*/
png_ptr->num_prev_filters = 0;
png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
if (png_ptr->prev_filters != NULL)
{
png_bytep old = png_ptr->prev_filters;
png_ptr->prev_filters = NULL;
png_free(png_ptr, old);
}
if (png_ptr->filter_weights != NULL)
{
png_uint_16p old = png_ptr->filter_weights;
png_ptr->filter_weights = NULL;
png_free(png_ptr, old);
}
png_debug(1, "in png_set_filter_heuristics");
if (png_ptr->inv_filter_weights != NULL)
{
png_uint_16p old = png_ptr->inv_filter_weights;
png_ptr->inv_filter_weights = NULL;
png_free(png_ptr, old);
}
/* Leave the filter_costs - this array is fixed size. */
}
static int
png_init_filter_heuristics(png_structp png_ptr, int heuristic_method,
int num_weights)
{
if (png_ptr == NULL)
return;
return 0;
if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
/* Clear out the arrays */
png_reset_filter_heuristics(png_ptr);
/* Check arguments; the 'reset' function makes the correct settings for the
* unweighted case, but we must handle the weight case by initializing the
* arrays for the caller.
*/
if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
png_warning(png_ptr, "Unknown filter heuristic method");
return;
}
int i;
if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT)
{
heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
}
if (num_weights < 0 || filter_weights == NULL ||
heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
{
num_weights = 0;
}
png_ptr->num_prev_filters = (png_byte)num_weights;
png_ptr->heuristic_method = (png_byte)heuristic_method;
if (num_weights > 0)
{
if (png_ptr->prev_filters == NULL)
if (num_weights > 0)
{
png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_byte) * num_weights));
@ -1209,85 +1227,169 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
{
png_ptr->prev_filters[i] = 255;
}
png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * num_weights));
png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * num_weights));
for (i = 0; i < num_weights; i++)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
/* Safe to set this now */
png_ptr->num_prev_filters = (png_byte)num_weights;
}
if (png_ptr->filter_weights == NULL)
/* If, in the future, there are other filter methods, this would
* need to be based on png_ptr->filter.
*/
if (png_ptr->filter_costs == NULL)
{
png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * num_weights));
png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * num_weights));
for (i = 0; i < num_weights; i++)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
}
for (i = 0; i < num_weights; i++)
{
if (filter_weights[i] < 0.0)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
else
{
png_ptr->inv_filter_weights[i] =
(png_uint_16)((double)PNG_WEIGHT_FACTOR*filter_weights[i]+0.5);
png_ptr->filter_weights[i] =
(png_uint_16)((double)PNG_WEIGHT_FACTOR/filter_weights[i]+0.5);
}
}
}
/* If, in the future, there are other filter methods, this would
* need to be based on png_ptr->filter.
*/
if (png_ptr->filter_costs == NULL)
{
png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
{
png_ptr->inv_filter_costs[i] =
png_ptr->filter_costs[i] = PNG_COST_FACTOR;
png_ptr->inv_filter_costs[i] =
png_ptr->filter_costs[i] = PNG_COST_FACTOR;
}
/* All the arrays are inited, safe to set this: */
png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED;
/* Return the 'ok' code. */
return 1;
}
/* Here is where we set the relative costs of the different filters. We
* should take the desired compression level into account when setting
* the costs, so that Paeth, for instance, has a high relative cost at low
* compression levels, while it has a lower relative cost at higher
* compression settings. The filter types are in order of increasing
* relative cost, so it would be possible to do this with an algorithm.
*/
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT ||
heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
{
if (filter_costs == NULL || filter_costs[i] < 0.0)
return 1;
}
else
{
png_warning(png_ptr, "Unknown filter heuristic method");
return 0;
}
}
/* Provide floating and fixed point APIs */
#ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int num_weights, png_doublep filter_weights, png_doublep filter_costs)
{
png_debug(1, "in png_set_filter_heuristics");
/* The internal API allocates all the arrays and ensures that the elements of
* those arrays are set to the default value.
*/
if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
return;
/* If using the weighted method copy in the weights. */
if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int i;
for (i = 0; i < num_weights; i++)
{
png_ptr->inv_filter_costs[i] =
png_ptr->filter_costs[i] = PNG_COST_FACTOR;
if (filter_weights[i] <= 0.0)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
else
{
png_ptr->inv_filter_weights[i] =
(png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5);
png_ptr->filter_weights[i] =
(png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5);
}
}
else if (filter_costs[i] >= 1.0)
/* Here is where we set the relative costs of the different filters. We
* should take the desired compression level into account when setting
* the costs, so that Paeth, for instance, has a high relative cost at low
* compression levels, while it has a lower relative cost at higher
* compression settings. The filter types are in order of increasing
* relative cost, so it would be possible to do this with an algorithm.
*/
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0)
{
png_ptr->inv_filter_costs[i] =
(png_uint_16)((double)PNG_COST_FACTOR / filter_costs[i] + 0.5);
png_ptr->inv_filter_costs[i] =
(png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5);
png_ptr->filter_costs[i] =
(png_uint_16)((double)PNG_COST_FACTOR * filter_costs[i] + 0.5);
png_ptr->filter_costs[i] =
(png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5);
}
}
}
#endif /* FLOATING_POINT */
#ifdef PNG_FIXED_POINT_SUPPORTED
void PNGAPI
png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method,
int num_weights, png_fixed_point_p filter_weights,
png_fixed_point_p filter_costs)
{
png_debug(1, "in png_set_filter_heuristics_fixed");
/* The internal API allocates all the arrays and ensures that the elements of
* those arrays are set to the default value.
*/
if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
return;
/* If using the weighted method copy in the weights. */
if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int i;
for (i = 0; i < num_weights; i++)
{
if (filter_weights[i] <= 0)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
else
{
png_ptr->inv_filter_weights[i] = (png_uint_16)
((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1);
png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR*
PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]);
}
}
/* Here is where we set the relative costs of the different filters. We
* should take the desired compression level into account when setting
* the costs, so that Paeth, for instance, has a high relative cost at low
* compression levels, while it has a lower relative cost at higher
* compression settings. The filter types are in order of increasing
* relative cost, so it would be possible to do this with an algorithm.
*/
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
if (filter_costs[i] >= PNG_FP_1)
{
png_ptr->inv_filter_costs[i] = (png_uint_16)((PNG_COST_FACTOR*
PNG_FP_1+(filter_costs[i]/2)) / filter_costs[i]);
png_ptr->filter_costs[i] = (png_uint_16)
((PNG_COST_FACTOR * filter_costs[i] +PNG_FP_HALF)/PNG_FP_1);
}
}
}
#endif /* FIXED_POINT */
#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
void PNGAPI

4
projects/vstudio/libpng/libpng.vcxproj
View File

@ -120,7 +120,7 @@
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
<Optimization>Disabled</Optimization>
<BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
<RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
<RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
<PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<IntrinsicFunctions>true</IntrinsicFunctions>
<FunctionLevelLinking>true</FunctionLevelLinking>
@ -176,7 +176,7 @@
<WarningLevel>Level4</WarningLevel>
<PrecompiledHeader>Use</PrecompiledHeader>
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
<RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
<RuntimeLibrary>MultiThreaded</RuntimeLibrary>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>

4
projects/vstudio/pngtest/pngtest.vcxproj
View File

@ -114,7 +114,7 @@
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
<Optimization>Disabled</Optimization>
<BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
<RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
<RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>$(ZLibSrcDir);..\..\..\scripts;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<DisableSpecificWarnings>4996</DisableSpecificWarnings>
@ -179,7 +179,7 @@
<PrecompiledHeader>NotUsing</PrecompiledHeader>
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
<Optimization>Full</Optimization>
<RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
<RuntimeLibrary>MultiThreaded</RuntimeLibrary>
<FunctionLevelLinking>false</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>

2
projects/vstudio/readme.txt
View File

@ -1,7 +1,7 @@
VisualStudio instructions
libpng version 1.5.0beta38 - July 30, 2010
libpng version 1.5.0beta38 - July 31, 2010
Copyright (c) 1998-2010 Glenn Randers-Pehrson

2
projects/vstudio/zlib.props
View File

@ -2,7 +2,7 @@
<!--
* zlib.props - location of zlib source and build
*
* libpng version 1.5.0beta38 - July 30, 2010
* libpng version 1.5.0beta38 - July 31, 2010
*
* Copyright (c) 1998-2010 Glenn Randers-Pehrson
*

38
projects/vstudio/zlib/zlib.vcxproj
View File

@ -9,6 +9,10 @@
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release Library|Win32">
<Configuration>Release Library</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
</ItemGroup>
<ItemGroup>
<ClCompile Include="$(ZLibSrcDir)\adler32.c" />
@ -35,6 +39,9 @@
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug Library|Win32'" Label="Configuration">
<ConfigurationType>StaticLibrary</ConfigurationType>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release Library|Win32'" Label="Configuration">
<ConfigurationType>StaticLibrary</ConfigurationType>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
<ConfigurationType>DynamicLibrary</ConfigurationType>
</PropertyGroup>
@ -47,6 +54,9 @@
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug Library|Win32'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
</ImportGroup>
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release Library|Win32'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
</ImportGroup>
<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
@ -57,6 +67,9 @@
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug Library|Win32'">
<LinkIncremental>true</LinkIncremental>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release Library|Win32'">
<LinkIncremental>true</LinkIncremental>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<LinkIncremental>true</LinkIncremental>
</PropertyGroup>
@ -64,10 +77,11 @@
<ClCompile>
<PreprocessorDefinitions>WIN32;ZLIB_DLL;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
<WarningLevel>Level3</WarningLevel>
<WarningLevel>TurnOffAllWarnings</WarningLevel>
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
<Optimization>Disabled</Optimization>
<IntrinsicFunctions>true</IntrinsicFunctions>
<BrowseInformation>true</BrowseInformation>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -80,10 +94,28 @@
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug Library|Win32'">
<ClCompile>
<PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
<WarningLevel>Level3</WarningLevel>
<RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
<WarningLevel>TurnOffAllWarnings</WarningLevel>
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
<Optimization>Disabled</Optimization>
<BrowseInformation>true</BrowseInformation>
</ClCompile>
<Link>
<TargetMachine>MachineX86</TargetMachine>
<GenerateDebugInformation>true</GenerateDebugInformation>
<SubSystem>Windows</SubSystem>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release Library|Win32'">
<ClCompile>
<RuntimeLibrary>MultiThreaded</RuntimeLibrary>
<WarningLevel>TurnOffAllWarnings</WarningLevel>
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
<Optimization>Full</Optimization>
<IntrinsicFunctions>true</IntrinsicFunctions>
<WholeProgramOptimization>true</WholeProgramOptimization>
<BufferSecurityCheck>false</BufferSecurityCheck>
<BrowseInformation>true</BrowseInformation>
</ClCompile>
<Link>
<TargetMachine>MachineX86</TargetMachine>

4
scripts/pnglibconf.dfa
View File

@ -6,7 +6,7 @@
#
com pnglibconf.h - library build configuration
com
com libpng version PNGLIB_VERSION - last changed on July 30, 2010
com libpng version PNGLIB_VERSION - last changed on July 31, 2010
com
com Copyright (c) 1998-2010 Glenn Randers-Pehrson
com
@ -338,7 +338,7 @@ option WRITE_INTERLACING requires WRITE
# The following depends, internally, on WEIGHT_SHIFT and COST_SHIFT
# where are set below.
option WRITE_WEIGHTED_FILTER requires WRITE FLOATING_POINT
option WRITE_WEIGHTED_FILTER requires WRITE
option WRITE_FLUSH requires WRITE

6
scripts/pngwin.def
View File

@ -218,11 +218,11 @@ EXPORTS
png_save_int_32 @206
png_save_uint_16 @207
png_set_gamma_fixed @208
; png_set_filter_heuristics_fixed @209
; png_get_pixel_aspect_ratio_fixed @210
png_set_filter_heuristics_fixed @209
png_get_pixel_aspect_ratio_fixed @210
png_get_x_offset_inches_fixed @211
png_get_y_offset_inches_fixed @212
; png_set_sCAL_fixed @213
png_set_sCAL_fixed @213
png_get_sCAL_fixed @214
png_get_num_passes @215
png_get_num_rows @216

6
scripts/symbols.def
View File

@ -214,11 +214,11 @@ EXPORTS
png_save_int_32 @206
png_save_uint_16 @207
png_set_gamma_fixed @208
; png_set_filter_heuristics_fixed @209
; png_get_pixel_aspect_ratio_fixed @210
png_set_filter_heuristics_fixed @209
png_get_pixel_aspect_ratio_fixed @210
png_get_x_offset_inches_fixed @211
png_get_y_offset_inches_fixed @212
; png_set_sCAL_fixed @213
png_set_sCAL_fixed @213
png_get_sCAL_fixed @214
png_get_num_passes @215
png_get_num_rows @216