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Fix undo misdetecting identical future chunk in some cases 

Clear is_identical_future before adding a next undo step, to avoid wrong
values for cases where we undo and then add a step with different changes
than what was previously the next step.

Ref D7274
This commit is contained in:
Brecht Van Lommel 2020-03-28 21:48:07 +01:00
parent 2e60226f23
commit f4982b555c
3 changed files with 12 additions and 0 deletions
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3
source/blender/blenkernel/intern/blender_undo.c
View File

@ -124,6 +124,9 @@ MemFileUndoData *BKE_memfile_undo_encode(Main *bmain, MemFileUndoData *mfu_prev)
}
else {
MemFile *prevfile = (mfu_prev) ? &(mfu_prev->memfile) : NULL;
if (prevfile) {
BLO_memfile_clear_future(prevfile);
}
/* success = */ /* UNUSED */ BLO_write_file_mem(bmain, prevfile, &mfu->memfile, G.fileflags);
mfu->undo_size = mfu->memfile.size;
}

1
source/blender/blenloader/BLO_undofile.h
View File

@ -60,6 +60,7 @@ extern void memfile_chunk_add(MemFile *memfile,
/* exports */
extern void BLO_memfile_free(MemFile *memfile);
extern void BLO_memfile_merge(MemFile *first, MemFile *second);
extern void BLO_memfile_clear_future(MemFile *memfile);
/* utilities */
extern struct Main *BLO_memfile_main_get(struct MemFile *memfile,

8
source/blender/blenloader/intern/undofile.c
View File

@ -92,6 +92,14 @@ void BLO_memfile_merge(MemFile *first, MemFile *second)
BLO_memfile_free(first);
}
/* Clear is_identical_future before adding next memfile. */
void BLO_memfile_clear_future(MemFile *memfile)
{
for (MemFileChunk *chunk = memfile->chunks.first; chunk; chunk = chunk->next) {
chunk->is_identical_future = false;
}
}
void memfile_chunk_add(MemFile *memfile, const char *buf, uint size, MemFileChunk **compchunk_step)
{
MemFileChunk *curchunk = MEM_mallocN(sizeof(MemFileChunk), "MemFileChunk");