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Filter code change prep.

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This commit moves code round and changes the filter write interfaces that took
png_uint_32 buffer pixel counts to unsigned int.  Also moves compression code
and definitions into pngwutil.c so that the compression code is isolated from
other definitions.

Signed-off-by: John Bowler <jbowler@acm.org>
This commit is contained in:
John Bowler
2015-11-27 15:42:52 -08:00
parent 14d11b9f35
commit b3a18efebf
7 changed files with 268 additions and 243 deletions
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36
pngwrite.c
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@@ -1093,40 +1093,6 @@ png_write_row(png_structrp png_ptr, png_const_bytep row)
} /* png_ptr != NULL */
}
#ifdef PNG_WRITE_FLUSH_SUPPORTED
/* Set the automatic flush interval or 0 to turn flushing off */
void PNGAPI
png_set_flush(png_structrp png_ptr, int nrows)
{
png_debug(1, "in png_set_flush");
if (png_ptr == NULL)
return;
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
}
/* Flush the current output buffers now */
void PNGAPI
png_write_flush(png_structrp png_ptr)
{
png_debug(1, "in png_write_flush");
if (png_ptr == NULL)
return;
/* Before the start of the IDAT and after the end of the image zowner will be
* something other than png_IDAT:
*/
if (png_ptr->zowner == png_IDAT)
{
png_compress_IDAT(png_ptr, NULL, 0, Z_SYNC_FLUSH);
png_ptr->flush_rows = 0;
png_flush(png_ptr);
}
}
#endif /* WRITE_FLUSH */
/* Free any memory used in png_ptr struct without freeing the struct itself. */
static void
png_write_destroy(png_structrp png_ptr)
@@ -1140,7 +1106,7 @@ png_write_destroy(png_structrp png_ptr)
if (ret != Z_OK)
{
png_zstream_error(png_ptr, ret);
png_zstream_error(&png_ptr->zstream, ret);
png_warning(png_ptr, png_ptr->zstream.msg);
}
}