[libpng16] Made progressive reading of interlaced images consistent with the
behavior of the sequential reader and consistent with the manual. The
row_callback now receives the proper pass number and unexpanded rows,
when png_combine_row is not used or not built, by moving some code
out of the PNG_READ_INTERLACING_SUPPORTED blocks.
diff --git a/pngpread.c b/pngpread.c
index 1bcc285..d02aa36 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1154,7 +1154,6 @@
}
}
else
-#endif
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
@@ -1164,7 +1163,6 @@
void /* PRIVATE */
png_read_push_finish_row(png_structrp png_ptr)
{
-#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
@@ -1189,7 +1187,6 @@
if (png_ptr->row_number < png_ptr->num_rows)
return;
-#ifdef PNG_READ_INTERLACING_SUPPORTED
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
@@ -1224,7 +1221,6 @@
} while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
}
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
}
void /* PRIVATE */
@@ -1249,7 +1245,6 @@
(int)png_ptr->pass);
}
-#ifdef PNG_READ_INTERLACING_SUPPORTED
void PNGAPI
png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
png_const_bytep new_row)
@@ -1262,9 +1257,8 @@
* it must be png_ptr->row_buf+1
*/
if (new_row != NULL)
- png_combine_row(png_ptr, old_row, 1/*display*/);
+ png_combine_row(png_ptr, old_row, 1/*blocky display*/);
}
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
void PNGAPI
png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr,
