Providing an incorrect mimetype or not specifying one
was not handled and resulted in data not being loaded
when loading the font from memory.
Now, the use of the TTF loader is enforced regardless
of the provided mimetype.
The Lottie loader now utilizes an individual scene instance per loader.
This guarantees that each instance retains a unique frame number,
essential for maintaining the integrity of animation states.
As a result, sharing loaders between Lottie animations is prohibited
to uphold frame context isolation.
This may be subject to optimization review in the future.
The previous loader cache mechanism encountered a problem
when the user changed the content of the cached data.
In such cases, a new request would not be processed
because the renderer would use the previously cached content.
So far, the TVG cache mechanism utilizes a pointer hash key
for the fastest hashing mechanism available.
One limitation is that it assumes the address is unique for the data.
To resolve this, we modified the caching policy.
Now, the renderer will not cache copied data;
it will only cache the given data when it is deemed shareable.
issue: https://github.com/thorvg/thorvg/issues/2020
enhance decoding efficiency by determining the desired canvas format
during image loading. This allows loaders to preemptively decode
the image in the specified format, to not convert the format again.
Attempt to load a given file/data using candidate formats
when the desired loader fails. This approach will enhance
the compatibility with various file formats in unexpected scenarios.
Previously, we had removed this feature, but have since
recognized its necessity due to the impact on file data
in specific corner cases.
Some systems such as micro-processor might not support
the thread feature on the system.
Enhance the portability by compiling the thorvg with toggling the
threading depepdency through the build option.
For this, thorvg newly introduced the internal Key/ScopedLock abstraction
for transparent thread-locking dependnecy.
To turn off the thread feature, please use the next build option:
$meson setup build -Dthreads=false ...
Note that, the thread feature is enabled in default.
Turning off the thread feature could reduce the binary size by 7kb.
issue: https://github.com/thorvg/thorvg/issues/1900
Applied 2 more internal LoaderMgr interfaces for
gobally manage the font data resources.
The next function is introduced for lookup the existing loader
with the font name (key)
- static LoaderMgr::LoadModule* loader(const char* key);
The next function is introduced to free the existing loader
with the loader source(file path)
- static bool retrieve(const string& path);
Additionally implements the base loader to bind the ttf loader.
We are introducing the FontLoader, which slightly differs
from the ImageLoader in terms of features. To adequately
support both, we have separated the loader functionalities
into FontLoader and ImageLoader. This allows us to optimally
adapt the LoadModule for each case.
The loader cache is applied to conserve memory.
If the input data is already present in loaders,
the loader cache will promptly return the active loader.
This results in a lot of memory savings for the duplicated resources.
binary diff: -400 bytes
I've added new parameter, const string& resourcePath, to load external image on lottie.
Result load(const char* data, uint32_t size, const string& mimeType, bool copy, const string& resourcePath)
Note: tvgLoadModule will have new overrided method `open`, not to effect to other changes except animation.
Issue: #1793
