/** * @file llgltfmaterial.h * @brief Material definition * * $LicenseInfo:firstyear=2022&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2022, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #pragma once #include "llrefcount.h" #include "llmemory.h" #include "v4color.h" #include "v3color.h" #include "v2math.h" #include "lluuid.h" #include "hbxxh.h" #include <array> #include <string> #include <map> namespace tinygltf { class Model; struct TextureInfo; class Value; } class LLTextureEntry; class LLGLTFMaterial : public LLRefCount { public: // default material for reference static const LLGLTFMaterial sDefault; static const char* const ASSET_VERSION; static const char* const ASSET_TYPE; // Max allowed size of a GLTF material asset or override, when serialized // as a minified JSON string static constexpr size_t MAX_ASSET_LENGTH = 2048; static const std::array<std::string, 2> ACCEPTED_ASSET_VERSIONS; static bool isAcceptedVersion(const std::string& version) { return std::find(ACCEPTED_ASSET_VERSIONS.cbegin(), ACCEPTED_ASSET_VERSIONS.cend(), version) != ACCEPTED_ASSET_VERSIONS.cend(); } struct TextureTransform { LLVector2 mOffset = { 0.f, 0.f }; LLVector2 mScale = { 1.f, 1.f }; F32 mRotation = 0.f; void getPacked(F32 (&packed)[8]) const; bool operator==(const TextureTransform& other) const; bool operator!=(const TextureTransform& other) const { return !(*this == other); } }; enum AlphaMode { ALPHA_MODE_OPAQUE = 0, ALPHA_MODE_BLEND, ALPHA_MODE_MASK }; LLGLTFMaterial() {} LLGLTFMaterial(const LLGLTFMaterial& rhs); LLGLTFMaterial& operator=(const LLGLTFMaterial& rhs); bool operator==(const LLGLTFMaterial& rhs) const; bool operator!=(const LLGLTFMaterial& rhs) const { return !(*this == rhs); } enum TextureInfo : U32 { GLTF_TEXTURE_INFO_BASE_COLOR, GLTF_TEXTURE_INFO_NORMAL, GLTF_TEXTURE_INFO_METALLIC_ROUGHNESS, // *NOTE: GLTF_TEXTURE_INFO_OCCLUSION is currently ignored, in favor of // the values specified with GLTF_TEXTURE_INFO_METALLIC_ROUGHNESS. // Currently, only ORM materials are supported (materials which define // occlusion, roughness, and metallic in the same texture). // -Cosmic,2023-01-26 GLTF_TEXTURE_INFO_OCCLUSION = GLTF_TEXTURE_INFO_METALLIC_ROUGHNESS, GLTF_TEXTURE_INFO_EMISSIVE, GLTF_TEXTURE_INFO_COUNT }; static const char* const GLTF_FILE_EXTENSION_TRANSFORM; static const char* const GLTF_FILE_EXTENSION_TRANSFORM_SCALE; static const char* const GLTF_FILE_EXTENSION_TRANSFORM_OFFSET; static const char* const GLTF_FILE_EXTENSION_TRANSFORM_ROTATION; static const LLUUID GLTF_OVERRIDE_NULL_UUID; std::array<LLUUID, GLTF_TEXTURE_INFO_COUNT> mTextureId; std::array<TextureTransform, GLTF_TEXTURE_INFO_COUNT> mTextureTransform; // NOTE: initialize values to defaults according to the GLTF spec // NOTE: these values should be in linear color space LLColor4 mBaseColor = LLColor4(1, 1, 1, 1); LLColor3 mEmissiveColor = LLColor3(0, 0, 0); F32 mMetallicFactor = 1.f; F32 mRoughnessFactor = 1.f; F32 mAlphaCutoff = 0.5f; bool mDoubleSided = false; AlphaMode mAlphaMode = ALPHA_MODE_OPAQUE; // override specific flags for state that can't use off-by-epsilon or UUID hack bool mOverrideDoubleSided = false; bool mOverrideAlphaMode = false; // *TODO: If/when we implement additional GLTF extensions, they may not be // compatible with our GLTF terrain implementation. We may want to disallow // materials with some features from being set on terrain, if their // implementation on terrain is not compliant with the spec: // - KHR_materials_transmission: Probably OK? // - KHR_materials_ior: Probably OK? // - KHR_materials_volume: Likely incompatible, as our terrain // heightmaps cannot currently be described as finite enclosed // volumes. // See also LLPanelRegionTerrainInfo::validateMaterials // get a UUID based on a hash of this LLGLTFMaterial LLUUID getHash() const; //setters for various members (will clamp to acceptable ranges) // for_override - set to true if this value is being set as part of an override (important for handling override to default value) void setTextureId(TextureInfo texture_info, const LLUUID& id, bool for_override = false); void setBaseColorId(const LLUUID& id, bool for_override = false); void setNormalId(const LLUUID& id, bool for_override = false); void setOcclusionRoughnessMetallicId(const LLUUID& id, bool for_override = false); void setEmissiveId(const LLUUID& id, bool for_override = false); void setBaseColorFactor(const LLColor4& baseColor, bool for_override = false); void setAlphaCutoff(F32 cutoff, bool for_override = false); void setEmissiveColorFactor(const LLColor3& emissiveColor, bool for_override = false); void setMetallicFactor(F32 metallic, bool for_override = false); void setRoughnessFactor(F32 roughness, bool for_override = false); void setAlphaMode(S32 mode, bool for_override = false); void setDoubleSided(bool double_sided, bool for_override = false); // *NOTE: texture offsets only exist in overrides, so "for_override" is not needed void setTextureOffset(TextureInfo texture_info, const LLVector2& offset); void setTextureScale(TextureInfo texture_info, const LLVector2& scale); void setTextureRotation(TextureInfo texture_info, float rotation); // Default value accessors static F32 getDefaultAlphaCutoff(); static S32 getDefaultAlphaMode(); static F32 getDefaultMetallicFactor(); static F32 getDefaultRoughnessFactor(); static LLColor4 getDefaultBaseColor(); static LLColor3 getDefaultEmissiveColor(); static bool getDefaultDoubleSided(); static LLVector2 getDefaultTextureOffset(); static LLVector2 getDefaultTextureScale(); static F32 getDefaultTextureRotation(); static void hackOverrideUUID(LLUUID& id); static void applyOverrideUUID(LLUUID& dst_id, const LLUUID& override_id); // set mAlphaMode from string. // Anything otherthan "MASK" or "BLEND" sets mAlphaMode to ALPHA_MODE_OPAQUE void setAlphaMode(const std::string& mode, bool for_override = false); const char* getAlphaMode() const; // set the contents of this LLGLTFMaterial from the given json // returns true if successful // if unsuccessful, the contents of this LLGLTFMaterial should be left unchanged and false is returned // json - the json text to load from // warn_msg - warning message from TinyGLTF if any // error_msg - error_msg from TinyGLTF if any bool fromJSON(const std::string& json, std::string& warn_msg, std::string& error_msg); // get the contents of this LLGLTFMaterial as a json string std::string asJSON(bool prettyprint = false) const; // initialize from given tinygltf::Model // model - the model to reference // mat_index - index of material in model's material array void setFromModel(const tinygltf::Model& model, S32 mat_index); // write to given tinygltf::Model void writeToModel(tinygltf::Model& model, S32 mat_index) const; virtual void applyOverride(const LLGLTFMaterial& override_mat); // apply the given LLSD override data void applyOverrideLLSD(const LLSD& data); // Get the given override on this LLGLTFMaterial as LLSD // override_mat -- the override source data // data -- output LLSD object (should be passed in empty) void getOverrideLLSD(const LLGLTFMaterial& override_mat, LLSD& data); // For base materials only (i.e. assets). Clears transforms to // default since they're not supported in assets yet. void sanitizeAssetMaterial(); // For material overrides only. Clears most properties to // default/fallthrough, but preserves the transforms. bool setBaseMaterial(); void setBaseMaterial(const LLGLTFMaterial& old_override_mat); // True if setBaseMaterial() was just called bool isClearedForBaseMaterial() const; // For local materials, they have to keep track of where // they are assigned to for full updates virtual void addTextureEntry(LLTextureEntry* te) {}; virtual void removeTextureEntry(LLTextureEntry* te) {}; // For local textures so that editor will know to track changes void addLocalTextureTracking(const LLUUID& tracking_id, const LLUUID &tex_id); void removeLocalTextureTracking(const LLUUID& tracking_id); bool hasLocalTextures() { return !mTrackingIdToLocalTexture.empty(); } virtual bool replaceLocalTexture(const LLUUID& tracking_id, const LLUUID &old_id, const LLUUID& new_id); virtual void updateTextureTracking(); // These fields are local to viewer and are a part of local bitmap support typedef std::map<LLUUID, LLUUID> local_tex_map_t; local_tex_map_t mTrackingIdToLocalTexture; protected: static LLVector2 vec2FromJson(const std::map<std::string, tinygltf::Value>& object, const char* key, const LLVector2& default_value); static F32 floatFromJson(const std::map<std::string, tinygltf::Value>& object, const char* key, const F32 default_value); template<typename T> static void allocateTextureImage(tinygltf::Model& model, T& texture_info, const std::string& uri); template<typename T> void setFromTexture(const tinygltf::Model& model, const T& texture_info, TextureInfo texture_info_id); template<typename T> static void setFromTexture(const tinygltf::Model& model, const T& texture_info, LLUUID& texture_id, TextureTransform& transform); template<typename T> void writeToTexture(tinygltf::Model& model, T& texture_info, TextureInfo texture_info_id, bool force_write = false) const; template<typename T> static void writeToTexture(tinygltf::Model& model, T& texture_info, const LLUUID& texture_id, const TextureTransform& transform, bool force_write = false); };