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Diffstat (limited to 'indra/newview/lltinygltfhelper.cpp')
| -rw-r--r-- | indra/newview/lltinygltfhelper.cpp | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/indra/newview/lltinygltfhelper.cpp b/indra/newview/lltinygltfhelper.cpp new file mode 100644 index 0000000000..05587af9bc --- /dev/null +++ b/indra/newview/lltinygltfhelper.cpp @@ -0,0 +1,308 @@ +/** + * @file lltinygltfhelper.cpp + * + * $LicenseInfo:firstyear=2022&license=viewerlgpl$ + * 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 + * $/LicenseInfo$ + */ + +#include "llviewerprecompiledheaders.h" + +#include "lltinygltfhelper.h" + +#include "llimage.h" +#include "llviewertexture.h" +#include "llviewertexturelist.h" + +void strip_alpha_channel(LLPointer<LLImageRaw>& img) +{ + if (img->getComponents() == 4) + { + LLImageRaw* tmp = new LLImageRaw(img->getWidth(), img->getHeight(), 3); + tmp->copyUnscaled4onto3(img); + img = tmp; + } +} + +// copy red channel from src_img to dst_img +// PRECONDITIONS: +// dst_img must be 3 component +// src_img and dst_image must have the same dimensions +void copy_red_channel(LLPointer<LLImageRaw>& src_img, LLPointer<LLImageRaw>& dst_img) +{ + llassert(src_img->getWidth() == dst_img->getWidth() && src_img->getHeight() == dst_img->getHeight()); + llassert(dst_img->getComponents() == 3); + + U32 pixel_count = dst_img->getWidth() * dst_img->getHeight(); + U8* src = src_img->getData(); + U8* dst = dst_img->getData(); + S8 src_components = src_img->getComponents(); + + for (U32 i = 0; i < pixel_count; ++i) + { + dst[i * 3] = src[i * src_components]; + } +} + +void LLTinyGLTFHelper::initFetchedTextures(tinygltf::Material& material, + LLPointer<LLImageRaw>& base_color_img, + LLPointer<LLImageRaw>& normal_img, + LLPointer<LLImageRaw>& mr_img, + LLPointer<LLImageRaw>& emissive_img, + LLPointer<LLImageRaw>& occlusion_img, + LLPointer<LLViewerFetchedTexture>& base_color_tex, + LLPointer<LLViewerFetchedTexture>& normal_tex, + LLPointer<LLViewerFetchedTexture>& mr_tex, + LLPointer<LLViewerFetchedTexture>& emissive_tex) +{ + if (base_color_img) + { + base_color_tex = LLViewerTextureManager::getFetchedTexture(base_color_img, FTType::FTT_LOCAL_FILE, true); + } + + if (normal_img) + { + strip_alpha_channel(normal_img); + normal_tex = LLViewerTextureManager::getFetchedTexture(normal_img, FTType::FTT_LOCAL_FILE, true); + } + + if (mr_img) + { + strip_alpha_channel(mr_img); + + if (occlusion_img && material.pbrMetallicRoughness.metallicRoughnessTexture.index != material.occlusionTexture.index) + { + // occlusion is a distinct texture from pbrMetallicRoughness + // pack into mr red channel + int occlusion_idx = material.occlusionTexture.index; + int mr_idx = material.pbrMetallicRoughness.metallicRoughnessTexture.index; + if (occlusion_idx != mr_idx) + { + //scale occlusion image to match resolution of mr image + occlusion_img->scale(mr_img->getWidth(), mr_img->getHeight()); + + copy_red_channel(occlusion_img, mr_img); + } + } + } + else if (occlusion_img) + { + //no mr but occlusion exists, make a white mr_img and copy occlusion red channel over + mr_img = new LLImageRaw(occlusion_img->getWidth(), occlusion_img->getHeight(), 3); + mr_img->clear(255, 255, 255); + copy_red_channel(occlusion_img, mr_img); + } + + if (mr_img) + { + mr_tex = LLViewerTextureManager::getFetchedTexture(mr_img, FTType::FTT_LOCAL_FILE, true); + } + + if (emissive_img) + { + strip_alpha_channel(emissive_img); + emissive_tex = LLViewerTextureManager::getFetchedTexture(emissive_img, FTType::FTT_LOCAL_FILE, true); + } +} + +LLColor4 LLTinyGLTFHelper::getColor(const std::vector<double>& in) +{ + LLColor4 out; + for (S32 i = 0; i < llmin((S32)in.size(), 4); ++i) + { + out.mV[i] = in[i]; + } + + return out; +} + +const tinygltf::Image * LLTinyGLTFHelper::getImageFromTextureIndex(const tinygltf::Model & model, S32 texture_index) +{ + if (texture_index >= 0) + { + S32 source_idx = model.textures[texture_index].source; + if (source_idx >= 0) + { + return &(model.images[source_idx]); + } + } + + return nullptr; +} + +LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tinygltf::Model & model, S32 texture_index, std::string & name) +{ + const tinygltf::Image* image = getImageFromTextureIndex(model, texture_index); + LLImageRaw* rawImage = nullptr; + + if (image != nullptr && + image->bits == 8 && + !image->image.empty() && + image->component <= 4) + { + name = image->name; + rawImage = new LLImageRaw(&image->image[0], image->width, image->height, image->component); + rawImage->verticalFlip(); + } + + return rawImage; +} + +LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tinygltf::Model & model, S32 texture_index) +{ + const tinygltf::Image* image = getImageFromTextureIndex(model, texture_index); + LLImageRaw* rawImage = nullptr; + + if (image != nullptr && + image->bits == 8 && + !image->image.empty() && + image->component <= 4) + { + rawImage = new LLImageRaw(&image->image[0], image->width, image->height, image->component); + rawImage->verticalFlip(); + } + + return rawImage; +} + +bool LLTinyGLTFHelper::getMaterialFromFile( + const std::string& filename, + S32 mat_index, + LLPointer < LLFetchedGLTFMaterial> material, + std::string& material_name) +{ + tinygltf::TinyGLTF loader; + std::string error_msg; + std::string warn_msg; + tinygltf::Model model_in; + std::string filename_lc = filename; + bool decode_successful = true; + + LLStringUtil::toLower(filename_lc); + + // Load a tinygltf model fom a file. Assumes that the input filename has already been + // been sanitized to one of (.gltf , .glb) extensions, so does a simple find to distinguish. + if (std::string::npos == filename_lc.rfind(".gltf")) + { // file is binary + decode_successful = loader.LoadBinaryFromFile(&model_in, &error_msg, &warn_msg, filename_lc); + } + else + { // file is ascii + decode_successful = loader.LoadASCIIFromFile(&model_in, &error_msg, &warn_msg, filename_lc); + } + + if (!decode_successful) + { + LL_WARNS("GLTF") << "Cannot load Material, error: " << error_msg + << ", warning:" << warn_msg + << " file: " << filename + << LL_ENDL; + return false; + } + else if (model_in.materials.size() <= mat_index) + { + // materials are missing + LL_WARNS("GLTF") << "Cannot load Material, Material " << mat_index << " is missing, " << filename << LL_ENDL; + return false; + } + + material->setFromModel(model_in, mat_index); + + std::string folder = gDirUtilp->getDirName(filename_lc); + tinygltf::Material material_in = model_in.materials[mat_index]; + + material_name = material_in.name; + + // get base color texture + LLPointer<LLImageRaw> base_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.pbrMetallicRoughness.baseColorTexture.index); + // get normal map + LLPointer<LLImageRaw> normal_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.normalTexture.index); + // get metallic-roughness texture + LLPointer<LLImageRaw> mr_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.pbrMetallicRoughness.metallicRoughnessTexture.index); + // get emissive texture + LLPointer<LLImageRaw> emissive_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.emissiveTexture.index); + // get occlusion map if needed + LLPointer<LLImageRaw> occlusion_img; + if (material_in.occlusionTexture.index != material_in.pbrMetallicRoughness.metallicRoughnessTexture.index) + { + occlusion_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.occlusionTexture.index); + } + + LLPointer<LLViewerFetchedTexture> base_color_tex; + LLPointer<LLViewerFetchedTexture> normal_tex; + LLPointer<LLViewerFetchedTexture> mr_tex; + LLPointer<LLViewerFetchedTexture> emissive_tex; + + // todo: pass it into local bitmaps? + LLTinyGLTFHelper::initFetchedTextures(material_in, + base_img, normal_img, mr_img, emissive_img, occlusion_img, + base_color_tex, normal_tex, mr_tex, emissive_tex); + + if (base_color_tex) + { + base_color_tex->addTextureStats(64.f * 64.f, TRUE); + material->mBaseColorId = base_color_tex->getID(); + material->mBaseColorTexture = base_color_tex; + } + else + { + material->mBaseColorId = LLUUID::null; + material->mBaseColorTexture = nullptr; + } + + if (normal_tex) + { + normal_tex->addTextureStats(64.f * 64.f, TRUE); + material->mNormalId = normal_tex->getID(); + material->mNormalTexture = normal_tex; + } + else + { + material->mNormalId = LLUUID::null; + material->mNormalTexture = nullptr; + } + + if (mr_tex) + { + mr_tex->addTextureStats(64.f * 64.f, TRUE); + material->mMetallicRoughnessId = mr_tex->getID(); + material->mMetallicRoughnessTexture = mr_tex; + } + else + { + material->mMetallicRoughnessId = LLUUID::null; + material->mMetallicRoughnessTexture = nullptr; + } + + if (emissive_tex) + { + emissive_tex->addTextureStats(64.f * 64.f, TRUE); + material->mEmissiveId = emissive_tex->getID(); + material->mEmissiveTexture = emissive_tex; + } + else + { + material->mEmissiveId = LLUUID::null; + material->mEmissiveTexture = nullptr; + } + + return true; + +} |