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Imported from libpng-0.99c.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-02-07 10:20:57 -06:00
parent b212002101
commit 0f881d62b3
26 changed files with 1197 additions and 239 deletions
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39
pngwrite.c
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@@ -1,12 +1,12 @@
/* pngwrite.c - general routines to write a PNG file
*
* libpng 0.99a
* libpng 0.99c
* 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
* Copyright (c) 1998, Glenn Randers-Pehrson
* January 31, 1998
* February 7, 1998
*/
/* get internal access to png.h */
@@ -77,7 +77,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
int j;
for (j=0; j<info_ptr->num_trans; j++)
for (j=0; j<(int)info_ptr->num_trans; j++)
info_ptr->trans[j] = 255 - info_ptr->trans[j];
}
#endif
@@ -230,7 +230,8 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
if (png_ptr->time_buffer == NULL)
{
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, 29*sizeof(char));
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
sizeof(char)));
}
#ifdef USE_FAR_KEYWORD
@@ -320,7 +321,8 @@ png_create_write_struct(png_const_charp user_png_ver, voidp error_ptr,
/* initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, png_ptr->zbuf_size);
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
png_set_write_fn(png_ptr, NULL, NULL, NULL);
@@ -351,7 +353,8 @@ png_write_init(png_structp png_ptr)
/* initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, png_ptr->zbuf_size);
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
png_set_write_fn(png_ptr, NULL, NULL, NULL);
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
@@ -487,6 +490,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth;
png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
png_ptr->row_info.channels);
png_ptr->row_info.rowbytes = ((png_ptr->row_info.width *
(png_uint_32)png_ptr->row_info.pixel_depth + 7) >> 3);
@@ -498,7 +502,8 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_debug1(3, "row_info->rowbytes = %d\n", png_ptr->row_info.rowbytes);
/* Copy user's row into buffer, leaving room for filter byte. */
png_memcpy(png_ptr->row_buf + 1, row, png_ptr->row_info.rowbytes);
png_buffered_memcpy(png_ptr, png_ptr->row_buf + 1, row,
png_ptr->row_info.rowbytes);
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
/* handle interlacing */
@@ -611,7 +616,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
if (info_ptr->pcal_params != NULL)
{
int i;
for (i = 0; i < info_ptr->pcal_nparams; i++)
for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
{
png_free(png_ptr, info_ptr->pcal_params[i]);
}
@@ -714,7 +719,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
if (png_ptr->do_filter & PNG_FILTER_SUB && png_ptr->sub_row == NULL)
{
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
png_ptr->rowbytes + 1);
(png_ptr->rowbytes + 1));
png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
}
@@ -728,7 +733,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
else
{
png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
png_ptr->rowbytes + 1);
(png_ptr->rowbytes + 1));
png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
}
}
@@ -743,7 +748,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
else
{
png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
png_ptr->rowbytes + 1);
(png_ptr->rowbytes + 1));
png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
}
}
@@ -759,7 +764,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
else
{
png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
png_ptr->rowbytes + 1);
(png_ptr->rowbytes + 1));
png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
}
}
@@ -815,7 +820,7 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
if (png_ptr->prev_filters == NULL)
{
png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr,
sizeof(png_byte) * num_weights);
(png_uint_32)(sizeof(png_byte) * num_weights));
/* To make sure that the weighting starts out fairly */
for (i = 0; i < num_weights; i++)
@@ -827,10 +832,10 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
if (png_ptr->filter_weights == NULL)
{
png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
sizeof(png_uint_16) * num_weights);
(png_uint_32)(sizeof(png_uint_16) * num_weights));
png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
sizeof(png_uint_16) * num_weights);
(png_uint_32)(sizeof(png_uint_16) * num_weights));
for (i = 0; i < num_weights; i++)
{
@@ -862,10 +867,10 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
if (png_ptr->filter_costs == NULL)
{
png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST);
(png_uint_32)(sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST);
(png_uint_32)(sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
{