Method ResolveImage

code/AssetLib/Blender/BlenderLoader.cpp:351–425

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// ------------------------------------------------------------------------------------------------
void BlenderImporter::ResolveImage(aiMaterial *out, const Material *mat, const MTex *tex, const Image *img, ConversionData &conv_data) {
    (void)mat;
    (void)tex;
    (void)conv_data;
    aiString name;

    // check if the file contents are bundled with the BLEND file
    if (img->packedfile) {
        name.data[0] = '*';
        name.length = 1 + ASSIMP_itoa10(name.data + 1, static_cast<unsigned int>(AI_MAXLEN - 1), static_cast<int32_t>(conv_data.textures->size()));

        conv_data.textures->push_back(new aiTexture());
        aiTexture *curTex = conv_data.textures->back();

        // usually 'img->name' will be the original file name of the embedded textures,
        // so we can extract the file extension from it.
        const size_t nlen = strlen(img->name);
        const char *s = img->name + nlen, *e = s;
        while (s >= img->name && *s != '.') {
            --s;
        }

        curTex->achFormatHint[0] = s + 1 > e ? '\0' : (char)::tolower((unsigned char)s[1]);
        curTex->achFormatHint[1] = s + 2 > e ? '\0' : (char)::tolower((unsigned char)s[2]);
        curTex->achFormatHint[2] = s + 3 > e ? '\0' : (char)::tolower((unsigned char)s[3]);
        curTex->achFormatHint[3] = '\0';

        // tex->mHeight = 0;
        curTex->mWidth = img->packedfile->size;
        uint8_t *ch = new uint8_t[curTex->mWidth];

        conv_data.db.reader->SetCurrentPos(static_cast<size_t>(img->packedfile->data->val));
        conv_data.db.reader->CopyAndAdvance(ch, curTex->mWidth);

        curTex->pcData = reinterpret_cast<aiTexel *>(ch);

        LogInfo("Reading embedded texture, original file was ", img->name);
    } else {
        name = aiString(img->name);
    }

    aiTextureType texture_type = aiTextureType_UNKNOWN;
    MTex::MapType map_type = tex->mapto;

    if (map_type & MTex::MapType_COL)
        texture_type = aiTextureType_DIFFUSE;
    else if (map_type & MTex::MapType_NORM) {
        if (tex->tex->imaflag & Tex::ImageFlags_NORMALMAP) {
            texture_type = aiTextureType_NORMALS;
        } else {
            texture_type = aiTextureType_HEIGHT;
        }
        out->AddProperty(&tex->norfac, 1, AI_MATKEY_BUMPSCALING);
    } else if (map_type & MTex::MapType_COLSPEC)
        texture_type = aiTextureType_SPECULAR;
    else if (map_type & MTex::MapType_COLMIR)
        texture_type = aiTextureType_REFLECTION;
    //else if (map_type & MTex::MapType_REF)