diff options
Diffstat (limited to 'indra/llprimitive/llgltfmaterial.cpp')
| -rw-r--r-- | indra/llprimitive/llgltfmaterial.cpp | 109 |
1 files changed, 90 insertions, 19 deletions
diff --git a/indra/llprimitive/llgltfmaterial.cpp b/indra/llprimitive/llgltfmaterial.cpp index 237636bd0b..12af568b7e 100644 --- a/indra/llprimitive/llgltfmaterial.cpp +++ b/indra/llprimitive/llgltfmaterial.cpp @@ -47,16 +47,49 @@ const char* const LLGLTFMaterial::GLTF_FILE_EXTENSION_TRANSFORM_ROTATION = "rota // special UUID that indicates a null UUID in override data const LLUUID LLGLTFMaterial::GLTF_OVERRIDE_NULL_UUID = LLUUID("ffffffff-ffff-ffff-ffff-ffffffffffff"); +LLGLTFMaterial::LLGLTFMaterial() +{ + // IMPORTANT: since we use the hash of the member variables memory block of + // this class to detect changes, we must ensure that all its padding bytes + // have been zeroed out. But of course, we must leave the LLRefCount member + // variable untouched (and skip it when hashing), and we cannot either + // touch the local texture overrides map (else we destroy pointers, and + // sundry private data, which would lead to a crash when using that map). + // The variable members have therefore been arranged so that anything, + // starting at mLocalTexDataDigest and up to the end of the members, can be + // safely zeroed. HB + const size_t offset = intptr_t(&mLocalTexDataDigest) - intptr_t(this); + memset((void*)((const char*)this + offset), 0, sizeof(*this) - offset); + + // Now that we zeroed out our member variables, we can set the ones that + // should not be zero to their default value. HB + mBaseColor.set(1.f, 1.f, 1.f, 1.f); + mMetallicFactor = mRoughnessFactor = 1.f; + mAlphaCutoff = 0.5f; + for (U32 i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) + { + mTextureTransform[i].mScale.set(1.f, 1.f); +#if 0 + mTextureTransform[i].mOffset.clear(); + mTextureTransform[i].mRotation = 0.f; +#endif + } +#if 0 + mLocalTexDataDigest = 0; + mAlphaMode = ALPHA_MODE_OPAQUE; // This is 0 + mOverrideDoubleSided = mOverrideAlphaMode = false; +#endif +} + void LLGLTFMaterial::TextureTransform::getPacked(F32 (&packed)[8]) const { packed[0] = mScale.mV[VX]; packed[1] = mScale.mV[VY]; packed[2] = mRotation; - // packed[3] = unused packed[4] = mOffset.mV[VX]; packed[5] = mOffset.mV[VY]; - // packed[6] = unused - // packed[7] = unused + // Not used but nonetheless zeroed for proper hashing. HB + packed[3] = packed[6] = packed[7] = 0.f; } bool LLGLTFMaterial::TextureTransform::operator==(const TextureTransform& other) const @@ -89,13 +122,37 @@ LLGLTFMaterial& LLGLTFMaterial::operator=(const LLGLTFMaterial& rhs) mOverrideDoubleSided = rhs.mOverrideDoubleSided; mOverrideAlphaMode = rhs.mOverrideAlphaMode; - mTrackingIdToLocalTexture = rhs.mTrackingIdToLocalTexture; - - updateTextureTracking(); + if (rhs.mTrackingIdToLocalTexture.empty()) + { + mTrackingIdToLocalTexture.clear(); + mLocalTexDataDigest = 0; + } + else + { + mTrackingIdToLocalTexture = rhs.mTrackingIdToLocalTexture; + updateLocalTexDataDigest(); + updateTextureTracking(); + } return *this; } +void LLGLTFMaterial::updateLocalTexDataDigest() +{ + mLocalTexDataDigest = 0; + if (!mTrackingIdToLocalTexture.empty()) + { + for (local_tex_map_t::const_iterator + it = mTrackingIdToLocalTexture.begin(), + end = mTrackingIdToLocalTexture.end(); + it != end; ++it) + { + mLocalTexDataDigest ^= it->first.getDigest64() ^ + it->second.getDigest64(); + } + } +} + bool LLGLTFMaterial::operator==(const LLGLTFMaterial& rhs) const { return mTextureId == rhs.mTextureId && @@ -547,7 +604,7 @@ void LLGLTFMaterial::applyOverride(const LLGLTFMaterial& override_mat) { LL_PROFILE_ZONE_SCOPED; - for (int i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) + for (U32 i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) { LLUUID& texture_id = mTextureId[i]; const LLUUID& override_texture_id = override_mat.mTextureId[i]; @@ -588,7 +645,7 @@ void LLGLTFMaterial::applyOverride(const LLGLTFMaterial& override_mat) mDoubleSided = override_mat.mDoubleSided; } - for (int i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) + for (U32 i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) { if (override_mat.mTextureTransform[i].mOffset != getDefaultTextureOffset()) { @@ -606,9 +663,13 @@ void LLGLTFMaterial::applyOverride(const LLGLTFMaterial& override_mat) } } - mTrackingIdToLocalTexture.insert(override_mat.mTrackingIdToLocalTexture.begin(), override_mat.mTrackingIdToLocalTexture.begin()); - - updateTextureTracking(); + if (!override_mat.mTrackingIdToLocalTexture.empty()) + { + auto it = override_mat.mTrackingIdToLocalTexture.begin(); + mTrackingIdToLocalTexture.insert(it, it); + updateLocalTexDataDigest(); + updateTextureTracking(); + } } void LLGLTFMaterial::getOverrideLLSD(const LLGLTFMaterial& override_mat, LLSD& data) @@ -618,7 +679,7 @@ void LLGLTFMaterial::getOverrideLLSD(const LLGLTFMaterial& override_mat, LLSD& d // make every effort to shave bytes here - for (int i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) + for (U32 i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) { LLUUID& texture_id = mTextureId[i]; const LLUUID& override_texture_id = override_mat.mTextureId[i]; @@ -663,7 +724,7 @@ void LLGLTFMaterial::getOverrideLLSD(const LLGLTFMaterial& override_mat, LLSD& d data["ds"] = override_mat.mDoubleSided; } - for (int i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) + for (U32 i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) { if (override_mat.mTextureTransform[i].mOffset != getDefaultTextureOffset()) { @@ -767,7 +828,7 @@ void LLGLTFMaterial::applyOverrideLLSD(const LLSD& data) const LLSD& ti = data["ti"]; if (ti.isArray()) { - for (int i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) + for (U32 i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) { const LLSD& o = ti[i]["o"]; if (o.isDefined()) @@ -793,27 +854,36 @@ void LLGLTFMaterial::applyOverrideLLSD(const LLSD& data) LLUUID LLGLTFMaterial::getHash() const { LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE; - // HACK - hash the bytes of this object but don't include the ref count - LLUUID hash; - HBXXH128::digest(hash, (unsigned char*)this + sizeof(LLRefCount), sizeof(*this) - sizeof(LLRefCount)); - return hash; + // *HACK: hash the bytes of this object but do not include the ref count + // neither the local texture overrides (which is a map, with pointers to + // key/value pairs that would change from one LLGLTFMaterial instance to + // the other, even though the key/value pairs could be the same, and stored + // elsewhere in the memory heap or on the stack). + // Note: this does work properly to compare two LLGLTFMaterial instances + // only because the padding bytes between their member variables have been + // dutifully zeroed in the constructor. HB + const size_t offset = intptr_t(&mLocalTexDataDigest) - intptr_t(this); + return HBXXH128::digest((const void*)((const char*)this + offset), + sizeof(*this) - offset); } void LLGLTFMaterial::addLocalTextureTracking(const LLUUID& tracking_id, const LLUUID& tex_id) { mTrackingIdToLocalTexture[tracking_id] = tex_id; + updateLocalTexDataDigest(); } void LLGLTFMaterial::removeLocalTextureTracking(const LLUUID& tracking_id) { mTrackingIdToLocalTexture.erase(tracking_id); + updateLocalTexDataDigest(); } bool LLGLTFMaterial::replaceLocalTexture(const LLUUID& tracking_id, const LLUUID& old_id, const LLUUID& new_id) { bool res = false; - for (int i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) + for (U32 i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i) { if (mTextureId[i] == old_id) { @@ -834,6 +904,7 @@ bool LLGLTFMaterial::replaceLocalTexture(const LLUUID& tracking_id, const LLUUID { mTrackingIdToLocalTexture.erase(tracking_id); } + updateLocalTexDataDigest(); return res; } |