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Fix regression loading tag colors incorrectly from .aseprite files

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Without this fix we would read old .aseprite files (saved with v1.2)
incorrectly: assigning user data that corresponded to other
objects (cels/slices/etc.) to tags.

Co-authored-by: David Capello <david@igarastudio.com>
This commit is contained in:
Gaspar Capello 2021-04-12 11:39:41 -03:00 committed by David Capello
parent a012dac020
commit a4ae88f307
1 changed files with 28 additions and 23 deletions
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51
src/dio/aseprite_decoder.cpp
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@ -1,5 +1,5 @@
// Aseprite Document IO Library
// Copyright (c) 2018-2020 Igara Studio S.A.
// Copyright (c) 2018-2021 Igara Studio S.A.
// Copyright (c) 2001-2018 David Capello
//
// This file is released under the terms of the MIT license.
@ -87,9 +87,6 @@ bool AsepriteDecoder::decode()
auto tag_it = sprite->tags().begin();
auto tag_end = sprite->tags().end();
// Used to read user data for each tag after a Tags chunk
bool tagsInProcess = false;
m_allLayers.clear();
int current_level = -1;
@ -211,9 +208,10 @@ bool AsepriteDecoder::decode()
tag_it = sprite->tags().begin();
tag_end = sprite->tags().end();
// If there are tags, any following user data chunk will
// be for each tag (starting from tag_it to tag_end-1).
tagsInProcess = (tag_it != tag_end);
if (tag_it != tag_end)
last_object_with_user_data = *tag_it;
else
last_object_with_user_data = nullptr;
break;
case ASE_FILE_CHUNK_SLICES: {
@ -232,23 +230,30 @@ bool AsepriteDecoder::decode()
doc::UserData userData;
readUserDataChunk(&userData);
// Are we are reading the user data of tags?
if (tagsInProcess) {
doc::Tag* tag = *tag_it;
// This will overwrite the tag color. The color field in
// Tags chunk is deprecated, only used for backward
// compatibility with old versions of Aseprite, we now
// use the color from the user data chunk.
tag->setUserData(userData);
tag_it++;
// Avoid reading more user data chunks than tags (this
// can happen in ill-formed files only)
if (tag_it == tag_end)
tagsInProcess = false;
}
else if (last_object_with_user_data) {
if (last_object_with_user_data) {
last_object_with_user_data->setUserData(userData);
if (last_object_with_user_data->type() == doc::ObjectType::Tag) {
// Tags are a special case, user data for tags come
// all together (one next to other) after the tags
// chunk, in the same order:
//
// * TAGS CHUNK (TAG1, TAG2, ..., TAGn)
// * USER DATA CHUNK FOR TAG1
// * USER DATA CHUNK FOR TAG2
// * ...
// * USER DATA CHUNK FOR TAGn
//
// So here we expect that the next user data chunk
// will correspond to the next tag in the tags
// collection.
++tag_it;
if (tag_it != tag_end)
last_object_with_user_data = *tag_it;
else
last_object_with_user_data = nullptr;
}
}
break;
}