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keys (#70)
LLUUID and LLMaterialID already have an excellent entropy and value dispersion; there is therefore strictly no need to further (slowly) hash their value for use with std and boost libraries containers.
This commit adds a trivial getDigest64() method to both LLUUID and LLMaterialID (which simply returns the XOR of the two 64 bits long words their value is made of), and uses it in std::hash and hash_value() specializations for use with containers.
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materials when present.
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speed matters. (#64)
This commit adds the HBXX64 and HBXX128 classes for use as a drop-in
replacement for the slow LLMD5 hashing class, where speed matters and
backward compatibility (with standard hashing algorithms) and/or
cryptographic hashing qualities are not required.
It also replaces LLMD5 with HBXX* in a few existing hot (well, ok, just
"warm" for some) paths meeting the above requirements, while paving the way for
future use cases, such as in the DRTVWR-559 and sibling branches where the slow
LLMD5 is used (e.g. to hash materials and vertex buffer cache entries), and
could be use such a (way) faster algorithm with very significant benefits and
no negative impact.
Here is the comment I added in indra/llcommon/hbxx.h:
// HBXXH* classes are to be used where speed matters and cryptographic quality
// is not required (no "one-way" guarantee, though they are likely not worst in
// this respect than MD5 which got busted and is now considered too weak). The
// xxHash code they are built upon is vectorized and about 50 times faster than
// MD5. A 64 bits hash class is also provided for when 128 bits of entropy are
// not needed. The hashes collision rate is similar to MD5's.
// See https://github.com/Cyan4973/xxHash#readme for details.
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speed matters. (#64)
This commit adds the HBXX64 and HBXX128 classes for use as a drop-in
replacement for the slow LLMD5 hashing class, where speed matters and
backward compatibility (with standard hashing algorithms) and/or
cryptographic hashing qualities are not required.
It also replaces LLMD5 with HBXX* in a few existing hot (well, ok, just
"warm" for some) paths meeting the above requirements, while paving the way for
future use cases, such as in the DRTVWR-559 and sibling branches where the slow
LLMD5 is used (e.g. to hash materials and vertex buffer cache entries), and
could be use such a (way) faster algorithm with very significant benefits and
no negative impact.
Here is the comment I added in indra/llcommon/hbxx.h:
// HBXXH* classes are to be used where speed matters and cryptographic quality
// is not required (no "one-way" guarantee, though they are likely not worst in
// this respect than MD5 which got busted and is now considered too weak). The
// xxHash code they are built upon is vectorized and about 50 times faster than
// MD5. A 64 bits hash class is also provided for when 128 bits of entropy are
// not needed. The hashes collision rate is similar to MD5's.
// See https://github.com/Cyan4973/xxHash#readme for details.
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Should be fixed by SL-18996, but just in case user decides to select a model while viewer closes
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SL-18869, SL-18772 Overhaul VBO management, restore occlusion culling, intel compatibility pass, etc
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asserts to allow non-default transform overrides.
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And cleaned up dupplicate mScale code
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# Conflicts:
# doc/contributions.txt
# indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
# indra/newview/llfloater360capture.cpp
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ID is null
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object's material override as a base, rather than its render material (pull request #1190)"
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material override as a base, rather than its render material
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SL-18485: Render GLTF materials with extension KHR_texture_transform with approprate texture transforms
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approprate texture transforms
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alpha mode and double sided to default
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overriding to default values.
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unused function.
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not matching GLTF spec
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existing primitive with overrides applied.
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DRTVWR-559
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message protocol.
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associated ViewerObject was ready to receive them.
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that as overrides applied.
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# Conflicts:
# indra/llrender/llgl.cpp
# indra/llrender/llrendertarget.cpp
# indra/newview/VIEWER_VERSION.txt
# indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
# indra/newview/llfloaterpreference.cpp
# indra/newview/llviewercontrol.cpp
# indra/newview/llviewermenu.cpp
# indra/newview/llviewertexturelist.cpp
# indra/newview/llvovolume.cpp
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# Conflicts:
# indra/newview/llnetmap.cpp
# indra/newview/llnetmap.h
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getters/setters and texture transform stub)
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add LLViewerFetchedTextures to LLFetchedGLTFMaterial. Lower reflection probe resolution to 128x128 per side.
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LLGLTFMaterialList now decodes gltf json overrides from the server
and stores them in LLTextureEntry::mGLTFMaterialOverrides
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properties in tinygltf schema json
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vovolume
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meshes.
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