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[master] Imported from libpng-1.6.15.tar

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This commit is contained in:
Glenn Randers-Pehrson
2014-11-20 09:33:25 -06:00
parent eed640dbe8
commit da7a1e79af
63 changed files with 1509 additions and 1215 deletions
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132
pngwutil.c
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@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* Last changed in libpng 1.6.14 [October 23, 2014]
* Last changed in libpng 1.6.15 [November 20, 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.)
@@ -211,7 +211,7 @@ png_image_size(png_structrp png_ptr)
if (png_ptr->rowbytes < 32768 && h < 32768)
{
if (png_ptr->interlaced)
if (png_ptr->interlaced != 0)
{
/* Interlacing makes the image larger because of the replication of
* both the filter byte and the padding to a byte boundary.
@@ -286,9 +286,7 @@ optimize_cmf(png_bytep data, png_alloc_size_t data_size)
}
}
}
#else
# define optimize_cmf(dp,dl) ((void)0)
#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */
#endif /* WRITE_OPTIMIZE_CMF */
/* Initialize the compressor for the appropriate type of compression. */
static int
@@ -297,7 +295,7 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
{
if (png_ptr->zowner != 0)
{
# if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
char msg[64];
PNG_STRING_FROM_CHUNK(msg, owner);
@@ -309,8 +307,8 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
* are minimal.
*/
(void)png_safecat(msg, (sizeof msg), 10, " using zstream");
# endif
# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC
#endif
#if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC
png_warning(png_ptr, msg);
/* Attempt sane error recovery */
@@ -321,9 +319,9 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
}
png_ptr->zowner = 0;
# else
#else
png_error(png_ptr, msg);
# endif
#endif
}
{
@@ -336,7 +334,7 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
if (owner == png_IDAT)
{
if (png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY)
if ((png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY) != 0)
strategy = png_ptr->zlib_strategy;
else if (png_ptr->do_filter != PNG_FILTER_NONE)
@@ -348,20 +346,20 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
else
{
# ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
level = png_ptr->zlib_text_level;
method = png_ptr->zlib_text_method;
windowBits = png_ptr->zlib_text_window_bits;
memLevel = png_ptr->zlib_text_mem_level;
strategy = png_ptr->zlib_text_strategy;
# else
#else
/* If customization is not supported the values all come from the
* IDAT values except for the strategy, which is fixed to the
* default. (This is the pre-1.6.0 behavior too, although it was
* implemented in a very different way.)
*/
strategy = Z_DEFAULT_STRATEGY;
# endif
#endif
}
/* Adjust 'windowBits' down if larger than 'data_size'; to stop this
@@ -388,7 +386,7 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
}
/* Check against the previous initialized values, if any. */
if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) &&
if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0 &&
(png_ptr->zlib_set_level != level ||
png_ptr->zlib_set_method != method ||
png_ptr->zlib_set_window_bits != windowBits ||
@@ -412,7 +410,7 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
/* Now initialize if required, setting the new parameters, otherwise just
* to a simple reset to the previous parameters.
*/
if (png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED)
if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0)
ret = deflateReset(&png_ptr->zstream);
else
@@ -619,9 +617,10 @@ png_text_compress(png_structrp png_ptr, png_uint_32 chunk_name,
*/
if (ret == Z_STREAM_END && input_len == 0)
{
#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
/* Fix up the deflate header, if required */
optimize_cmf(comp->output, comp->input_len);
#endif
/* But Z_OK is returned, not Z_STREAM_END; this allows the claim
* function above to return Z_STREAM_END on an error (though it never
* does in the current versions of zlib.)
@@ -664,7 +663,7 @@ png_write_compressed_data_out(png_structrp png_ptr, compression_state *comp)
if (output_len > 0)
png_error(png_ptr, "error writing ancillary chunked compressed data");
}
#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */
#endif /* WRITE_COMPRESSED_TEXT */
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
@@ -717,7 +716,7 @@ png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
bad_character = ch; /* just skip it, record the first error */
}
if (key_len > 0 && space) /* trailing space */
if (key_len > 0 && space != 0) /* trailing space */
{
--key_len, --new_key;
if (bad_character == 0)
@@ -732,7 +731,7 @@ png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
#ifdef PNG_WARNINGS_SUPPORTED
/* Try to only output one warning per keyword: */
if (*key) /* keyword too long */
if (*key != 0) /* keyword too long */
png_warning(png_ptr, "keyword truncated");
else if (bad_character != 0)
@@ -744,11 +743,11 @@ png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'");
}
#endif /* PNG_WARNINGS_SUPPORTED */
#endif /* WARNINGS */
return key_len;
}
#endif
#endif /* WRITE_TEXT || WRITE_pCAL || WRITE_iCCP || WRITE_sPLT */
/* Write the IHDR chunk, and update the png_struct with the necessary
* information. Note that the rest of this code depends upon this
@@ -849,8 +848,8 @@ png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height,
*/
if (
#ifdef PNG_MNG_FEATURES_SUPPORTED
!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 &&
((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) &&
(color_type == PNG_COLOR_TYPE_RGB ||
color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
(filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
@@ -931,7 +930,7 @@ png_write_PLTE(png_structrp png_ptr, png_const_colorp palette,
if ((
#ifdef PNG_MNG_FEATURES_SUPPORTED
!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 &&
#endif
num_pal == 0) || num_pal > 256)
{
@@ -947,7 +946,7 @@ png_write_PLTE(png_structrp png_ptr, png_const_colorp palette,
}
}
if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0)
{
png_warning(png_ptr,
"Ignoring request to write a PLTE chunk in grayscale PNG");
@@ -1074,11 +1073,11 @@ png_compress_IDAT(png_structrp png_ptr, png_const_bytep input,
/* Write an IDAT containing the data then reset the buffer. The
* first IDAT may need deflate header optimization.
*/
# ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
if (!(png_ptr->mode & PNG_HAVE_IDAT) &&
png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 &&
png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
optimize_cmf(data, png_image_size(png_ptr));
# endif
#endif
png_write_complete_chunk(png_ptr, png_IDAT, data, size);
png_ptr->mode |= PNG_HAVE_IDAT;
@@ -1120,11 +1119,11 @@ png_compress_IDAT(png_structrp png_ptr, png_const_bytep input,
png_bytep data = png_ptr->zbuffer_list->output;
uInt size = png_ptr->zbuffer_size - png_ptr->zstream.avail_out;
# ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
if (!(png_ptr->mode & PNG_HAVE_IDAT) &&
png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
optimize_cmf(data, png_image_size(png_ptr));
# endif
#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 &&
png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
optimize_cmf(data, png_image_size(png_ptr));
#endif
png_write_complete_chunk(png_ptr, png_IDAT, data, size);
png_ptr->zstream.avail_out = 0;
@@ -1345,7 +1344,7 @@ png_write_sBIT(png_structrp png_ptr, png_const_color_8p sbit, int color_type)
png_debug(1, "in png_write_sBIT");
/* Make sure we don't depend upon the order of PNG_COLOR_8 */
if (color_type & PNG_COLOR_MASK_COLOR)
if ((color_type & PNG_COLOR_MASK_COLOR) != 0)
{
png_byte maxbits;
@@ -1378,7 +1377,7 @@ png_write_sBIT(png_structrp png_ptr, png_const_color_8p sbit, int color_type)
size = 1;
}
if (color_type & PNG_COLOR_MASK_ALPHA)
if ((color_type & PNG_COLOR_MASK_ALPHA) != 0)
{
if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)
{
@@ -1465,9 +1464,9 @@ png_write_tRNS(png_structrp png_ptr, png_const_bytep trans_alpha,
png_save_uint_16(buf + 2, tran->green);
png_save_uint_16(buf + 4, tran->blue);
#ifdef PNG_WRITE_16BIT_SUPPORTED
if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0)
#else
if (buf[0] | buf[2] | buf[4])
if ((buf[0] | buf[2] | buf[4]) != 0)
#endif
{
png_app_warning(png_ptr,
@@ -1498,8 +1497,8 @@ png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type)
{
if (
#ifdef PNG_MNG_FEATURES_SUPPORTED
(png_ptr->num_palette ||
(!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) &&
(png_ptr->num_palette != 0 ||
(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0) &&
#endif
back->index >= png_ptr->num_palette)
{
@@ -1511,15 +1510,15 @@ png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type)
png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
}
else if (color_type & PNG_COLOR_MASK_COLOR)
else if ((color_type & PNG_COLOR_MASK_COLOR) != 0)
{
png_save_uint_16(buf, back->red);
png_save_uint_16(buf + 2, back->green);
png_save_uint_16(buf + 4, back->blue);
#ifdef PNG_WRITE_16BIT_SUPPORTED
if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0)
#else
if (buf[0] | buf[2] | buf[4])
if ((buf[0] | buf[2] | buf[4]) != 0)
#endif
{
png_warning(png_ptr,
@@ -1986,12 +1985,13 @@ png_write_start_row(png_structrp png_ptr)
}
/* We only need to keep the previous row if we are using one of these. */
if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
if ((png_ptr->do_filter &
(PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH)) != 0)
{
/* Set up previous row buffer */
png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, buf_size);
if (png_ptr->do_filter & PNG_FILTER_UP)
if ((png_ptr->do_filter & PNG_FILTER_UP) != 0)
{
png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
png_ptr->rowbytes + 1);
@@ -1999,7 +1999,7 @@ png_write_start_row(png_structrp png_ptr)
png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
}
if (png_ptr->do_filter & PNG_FILTER_AVG)
if ((png_ptr->do_filter & PNG_FILTER_AVG) != 0)
{
png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
png_ptr->rowbytes + 1);
@@ -2007,7 +2007,7 @@ png_write_start_row(png_structrp png_ptr)
png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
}
if (png_ptr->do_filter & PNG_FILTER_PAETH)
if ((png_ptr->do_filter & PNG_FILTER_PAETH) != 0)
{
png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
png_ptr->rowbytes + 1);
@@ -2015,13 +2015,13 @@ png_write_start_row(png_structrp png_ptr)
png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
}
}
#endif /* PNG_WRITE_FILTER_SUPPORTED */
#endif /* WRITE_FILTER */
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* If interlaced, we need to set up width and height of pass */
if (png_ptr->interlaced)
if (png_ptr->interlaced != 0)
{
if (!(png_ptr->transformations & PNG_INTERLACE))
if ((png_ptr->transformations & PNG_INTERLACE) == 0)
{
png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
png_pass_ystart[0]) / png_pass_yinc[0];
@@ -2076,10 +2076,10 @@ png_write_finish_row(png_structrp png_ptr)
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* If interlaced, go to next pass */
if (png_ptr->interlaced)
if (png_ptr->interlaced != 0)
{
png_ptr->row_number = 0;
if (png_ptr->transformations & PNG_INTERLACE)
if ((png_ptr->transformations & PNG_INTERLACE) != 0)
{
png_ptr->pass++;
}
@@ -2104,7 +2104,7 @@ png_write_finish_row(png_structrp png_ptr)
png_pass_ystart[png_ptr->pass]) /
png_pass_yinc[png_ptr->pass];
if (png_ptr->transformations & PNG_INTERLACE)
if ((png_ptr->transformations & PNG_INTERLACE) != 0)
break;
} while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
@@ -2383,7 +2383,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
/* We don't need to test the 'no filter' case if this is the only filter
* that has been chosen, as it doesn't actually do anything to the data.
*/
if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE)
if ((filter_to_do & PNG_FILTER_NONE) != 0 && filter_to_do != PNG_FILTER_NONE)
{
png_bytep rp;
png_uint_32 sum = 0;
@@ -2459,7 +2459,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
best_row = png_ptr->sub_row;
}
else if (filter_to_do & PNG_FILTER_SUB)
else if ((filter_to_do & PNG_FILTER_SUB) != 0)
{
png_bytep rp, dp, lp;
png_uint_32 sum = 0, lmins = mins;
@@ -2580,7 +2580,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
best_row = png_ptr->up_row;
}
else if (filter_to_do & PNG_FILTER_UP)
else if ((filter_to_do & PNG_FILTER_UP) != 0)
{
png_bytep rp, dp, pp;
png_uint_32 sum = 0, lmins = mins;
@@ -2694,7 +2694,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
best_row = png_ptr->avg_row;
}
else if (filter_to_do & PNG_FILTER_AVG)
else if ((filter_to_do & PNG_FILTER_AVG) != 0)
{
png_bytep rp, dp, pp, lp;
png_uint_32 sum = 0, lmins = mins;
@@ -2796,7 +2796,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
}
/* Paeth filter */
if (filter_to_do == PNG_FILTER_PAETH)
if ((filter_to_do == PNG_FILTER_PAETH) != 0)
{
png_bytep rp, dp, pp, cp, lp;
png_size_t i;
@@ -2835,7 +2835,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
best_row = png_ptr->paeth_row;
}
else if (filter_to_do & PNG_FILTER_PAETH)
else if ((filter_to_do & PNG_FILTER_PAETH) != 0)
{
png_bytep rp, dp, pp, cp, lp;
png_uint_32 sum = 0, lmins = mins;
@@ -2905,7 +2905,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
pc = (p + pc) < 0 ? -(p + pc) : p + pc;
#endif
p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c;
#else /* PNG_SLOW_PAETH */
#else /* SLOW_PAETH */
p = a + b - c;
pa = abs(p - a);
pb = abs(p - b);
@@ -2919,7 +2919,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
else
p = c;
#endif /* PNG_SLOW_PAETH */
#endif /* SLOW_PAETH */
v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
@@ -2968,7 +2968,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
best_row = png_ptr->paeth_row;
}
}
#endif /* PNG_WRITE_FILTER_SUPPORTED */
#endif /* WRITE_FILTER */
/* Do the actual writing of the filtered row data from the chosen filter. */
png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
@@ -2988,7 +2988,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
png_ptr->prev_filters[j] = best_row[0];
}
#endif
#endif /* PNG_WRITE_FILTER_SUPPORTED */
#endif /* WRITE_FILTER */
}
@@ -3024,6 +3024,6 @@ png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
{
png_write_flush(png_ptr);
}
#endif
#endif /* WRITE_FLUSH */
}
#endif /* PNG_WRITE_SUPPORTED */
#endif /* WRITE */