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Imported from libpng-1.0.2a.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-12-29 11:47:59 -06:00
parent 345bc27e70
commit 5c6aeb25c1
45 changed files with 1160 additions and 735 deletions
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14
pngwutil.c
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@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng 1.0.2 - June 14, 1998
* libpng 1.0.2a - December 29, 1998
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -376,9 +376,9 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
{
png_byte maxbits;
maxbits = color_type==PNG_COLOR_TYPE_PALETTE ? 8:png_ptr->usr_bit_depth;
if (sbit->red == 0 || sbit->red > maxbits ||
sbit->green == 0 || sbit->green > maxbits ||
maxbits = color_type==PNG_COLOR_TYPE_PALETTE ? 8 : png_ptr->usr_bit_depth;
if (sbit->red == 0 || sbit->red > maxbits ||
sbit->green == 0 || sbit->green > maxbits ||
sbit->blue == 0 || sbit->blue > maxbits)
{
png_warning(png_ptr, "Invalid sBIT depth specified");
@@ -952,7 +952,7 @@ void
png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_int_32 X1, int type, int nparams, png_charp units, png_charpp params)
{
png_size_t purpose_len, units_len, total_len;
png_size_t purpose_len, units_len, total_len;
png_uint_32p params_len;
png_byte buf[10];
png_charp new_purpose;
@@ -1180,7 +1180,7 @@ png_write_finish_row(png_structp png_ptr)
if (png_ptr->pass < 7)
{
if (png_ptr->prev_row != NULL)
png_memset(png_ptr->prev_row, 0,
png_memset(png_ptr->prev_row, 0,
(png_size_t) (((png_uint_32)png_ptr->usr_channels *
(png_uint_32)png_ptr->usr_bit_depth *
png_ptr->width + 7) >> 3) + 1);
@@ -1772,7 +1772,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
}
for (lp = row_buf + 1; i < row_bytes; i++)
{
v = *dp++ =
v = *dp++ =
(png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff);
sum += (v < 128) ? v : 256 - v;