- Implement PR #9842 to fix integer overflows in transcodeImageLevel.
- Fix potential division by zero in transcodeImageLevel if bytesPerPix is 0.
- Fix memory leaks in transcodeImageLevel by freeing allocated buffers on
failure.
- Fix memory leak in Ktx2Reader::load by deleting PixelBufferDescriptor after
use.
When we call TextureProvider::cancelDecoding, we should make sure
that textures that have been decoded, but not yet used (popped)
should be released (i.e. memory freed and the meta data marked
appropriately.)
mipgen can now emit basis-encoded KTX2 files. Both the desktop and
web "suzanne" samples use this as a test for compressed textures.
This PR does not add KTX2 support to glTF, but it's on the way.
`BasisEncoder` has a builder style API that calls the basis encoder to
create KTX2 files. This hides some low-level BasisU features that we are
not using, like file I/O and mipmap generation.
`Ktx2Reader` is an easy-to-use API for creating Filament textures from
KTX2 files. Its API primarily consists of these two methods:
bool requestFormat(Texture::InternalFormat format);
Filament::Texture* load(const uint8_t* data, size_t size);
The first method is used to build an ordered list of formats that are
supported by your hardware. The second method consumes the contents of a
basis-encoded KTX2 file and attempts to produce a Filament texture with
a preferred format.
IMPORTANT: Our tools still let you use KTX1 for non-compressed images
because it is useful for HDR, but you can no longer use KTX1 for
block-compressed data.
Partial fix for #4771.
