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/**
* @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 "llmd5.h"
#include <string>
namespace tinygltf
{
class Model;
}
class LLGLTFMaterial : public LLRefCount
{
public:
struct TextureTransform
{
LLVector2 mOffset = { 0.f, 0.f };
LLVector2 mScale = { 1.f, 1.f };
F32 mRotation = 0.f;
};
enum AlphaMode
{
ALPHA_MODE_OPAQUE = 0,
ALPHA_MODE_BLEND,
ALPHA_MODE_MASK
};
LLGLTFMaterial() {}
LLGLTFMaterial(const LLGLTFMaterial& rhs);
LLGLTFMaterial& operator=(const LLGLTFMaterial& rhs);
LLUUID mBaseColorId;
LLUUID mNormalId;
LLUUID mMetallicRoughnessId;
LLUUID mEmissiveId;
LLColor4 mBaseColor = LLColor4(1, 1, 1, 1);
LLColor3 mEmissiveColor = LLColor3(0, 0, 0);
F32 mMetallicFactor = 0.f;
F32 mRoughnessFactor = 0.f;
F32 mAlphaCutoff = 0.f;
bool mDoubleSided = false;
AlphaMode mAlphaMode = ALPHA_MODE_OPAQUE;
enum TextureTransformIdx : U32
{
TEXTURE_TRANSFORM_DIFFUSE_EMISSIVE,
TEXTURE_TRANSFORM_NORMAL,
TEXTURE_TRANSFORM_METALLIC_ROUGHNESS
};
TextureTransform mTextureTransform[3];
//setters for various members (will clamp to acceptable ranges)
void setBaseColorId(const LLUUID& id);
void setNormalId(const LLUUID& id);
void setMetallicRoughnessId(const LLUUID& id);
void setEmissiveId(const LLUUID& id);
void setBaseColorFactor(const LLColor3& baseColor, F32 transparency);
void setAlphaCutoff(F32 cutoff);
void setEmissiveColorFactor(const LLColor3& emissiveColor);
void setMetallicFactor(F32 metallic);
void setRoughnessFactor(F32 roughness);
void setAlphaMode(S32 mode);
void setDoubleSided(bool double_sided);
// Default value accessors
static LLUUID getDefaultBaseColorId();
static LLUUID getDefaultNormalId();
static LLUUID getDefaultEmissiveId();
static LLUUID getDefaultMetallicRoughnessId();
static F32 getDefaultAlphaCutoff();
static S32 getDefaultAlphaMode();
static F32 getDefaultMetallicFactor();
static F32 getDefaultRoughnessFactor();
static LLColor4 getDefaultBaseColor();
static LLColor3 getDefaultEmissiveColor();
static bool getDefaultDoubleSided();
// set mAlphaMode from string.
// Anything otherthan "MASK" or "BLEND" sets mAlphaMode to ALPHA_MODE_OPAQUE
void setAlphaMode(const std::string& mode)
{
if (mode == "MASK")
{
mAlphaMode = ALPHA_MODE_MASK;
}
else if (mode == "BLEND")
{
mAlphaMode = ALPHA_MODE_BLEND;
}
else
{
mAlphaMode = ALPHA_MODE_OPAQUE;
}
}
const char* getAlphaMode() const
{
switch (mAlphaMode)
{
case ALPHA_MODE_MASK: return "MASK";
case ALPHA_MODE_BLEND: return "BLEND";
default: return "OPAQUE";
}
}
// set the contents of this LLGLTFMaterial from the given json
// returns true if successful
// 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;
// get a UUID based on a hash of this LLGLTFMaterial
LLUUID getHash() const
{
LLMD5 md5;
md5.update((unsigned char*)this, sizeof(this));
md5.finalize();
LLUUID id;
md5.raw_digest(id.mData);
return id;
}
// calculate the fields in this material that differ from a base material and write them out to a given tinygltf::Model
void writeOverridesToModel(tinygltf::Model& model, S32 mat_index, LLGLTFMaterial const* base_material) const;
void applyOverride(const LLGLTFMaterial& override_mat);
};
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