commit f8eaf32ba85828528c41f97e78da2d8f24d1f2b8
author Wan-Teh Chang <wtc@google.com> Fri Apr 14 13:45:22 2023 -0700
committer Wan-Teh Chang <wtc@google.com> Sat Apr 15 07:14:21 2023 -0700
tree 39709ebdcde29615146f10de121595b661aa78bc
parent 535fe93e7c68a43addfc9de0f747ae556dec8dcd

avifDecoderDecodeTiles Use `tile` in non-grid path

The non-grid path of avifDecoderDecodeTiles() uses the expression
    decoder->data->tiles.tile[info->firstTileIndex]

I believe that is the variable `tile` (dereferenced). This requires
tileIndex == 0, so add an assertion for that. That assertion can be
removed in the future.

src/read.c

diff --git a/src/read.c b/src/read.c
index 0c0fb89..a9f17ed 100644
--- a/src/read.c
+++ b/src/read.c
@@ -4003,7 +4003,8 @@
         } else {
             // Non-grid path. Just steal the planes from the only "tile".
             assert(info->tileCount == 1);
-            avifImage * src = decoder->data->tiles.tile[info->firstTileIndex].image;
+            assert(tileIndex == 0);
+            avifImage * src = tile->image;
             if ((decoder->image->width != src->width) || (decoder->image->height != src->height) ||
                 (decoder->image->depth != src->depth)) {
                 if (tile->input->alpha) {