示例#1
0
bool
OpenEXRInput::read_native_tile (int x, int y, int z, void *data)
{
    ASSERT (m_input_tiled != NULL);

    // Compute where OpenEXR needs to think the full buffers starts.
    // OpenImageIO requires that 'data' points to where the client wants
    // to put the pixels being read, but OpenEXR's frameBuffer.insert()
    // wants where the address of the "virtual framebuffer" for the
    // whole image.
    size_t pixelbytes = m_spec.pixel_bytes (true);
    char *buf = (char *)data
              - x * pixelbytes
              - y * pixelbytes * m_spec.tile_width;

    try {
        Imf::FrameBuffer frameBuffer;
        size_t chanoffset = 0;
        for (int c = 0;  c < m_spec.nchannels;  ++c) {
            size_t chanbytes = m_spec.channelformats.size() 
                                  ? m_spec.channelformats[c].size() 
                                  : m_spec.format.size();
            frameBuffer.insert (m_spec.channelnames[c].c_str(),
                                Imf::Slice (m_pixeltype[c],
                                            buf + chanoffset, pixelbytes,
                                            pixelbytes*m_spec.tile_width));
            chanoffset += chanbytes;
        }
        m_input_tiled->setFrameBuffer (frameBuffer);
        m_input_tiled->readTile ((x - m_spec.x) / m_spec.tile_width,
                                 (y - m_spec.y) / m_spec.tile_height,
                                 m_miplevel, m_miplevel);
    }
    catch (const std::exception &e) {
        error ("Filed OpenEXR read: %s", e.what());
        return false;
    }

    return true;
}
示例#2
0
bool
OpenEXRInput::seek_subimage (int subimage, int miplevel, ImageSpec &newspec)
{
    if (subimage < 0 || subimage >= m_nsubimages)   // out of range
        return false;

    if (subimage == m_subimage && miplevel == m_miplevel) {  // no change
        newspec = m_spec;
        return true;
    }

    PartInfo &part (m_parts[subimage]);
    if (! part.initialized) {
        const Imf::Header *header = NULL;
#ifdef USE_OPENEXR_VERSION2
        if (m_input_multipart)
            header = &(m_input_multipart->header(subimage));
#else
        if (m_input_tiled)
            header = &(m_input_tiled->header());
        if (m_input_scanline)
            header = &(m_input_scanline->header());
#endif
        part.parse_header (header);
        part.initialized = true;
    }

#ifdef USE_OPENEXR_VERSION2
    if (subimage != m_subimage) {
        delete m_scanline_input_part;  m_scanline_input_part = NULL;
        delete m_tiled_input_part;  m_tiled_input_part = NULL;
        delete m_deep_scanline_input_part;  m_deep_scanline_input_part = NULL;
        delete m_deep_tiled_input_part;  m_deep_tiled_input_part = NULL;
        try {
            if (part.spec.deep) {
                if (part.spec.tile_width)
                    m_deep_tiled_input_part = new Imf::DeepTiledInputPart (*m_input_multipart, subimage);
                else
                    m_deep_scanline_input_part = new Imf::DeepScanLineInputPart (*m_input_multipart, subimage);
            } else {
                if (part.spec.tile_width)
                    m_tiled_input_part = new Imf::TiledInputPart (*m_input_multipart, subimage);
                else
                    m_scanline_input_part = new Imf::InputPart (*m_input_multipart, subimage);
            }
        }
        catch (const std::exception &e) {
            error ("OpenEXR exception: %s", e.what());
            m_scanline_input_part = NULL;
            m_tiled_input_part = NULL;
            m_deep_scanline_input_part = NULL;
            m_deep_tiled_input_part = NULL;
            ASSERT(0);
            return false;
        }
    }
#endif

    m_subimage = subimage;

    if (miplevel < 0 || miplevel >= part.nmiplevels)   // out of range
        return false;

    m_miplevel = miplevel;
    m_spec = part.spec;

    if (miplevel == 0 && part.levelmode == Imf::ONE_LEVEL) {
        newspec = m_spec;
        return true;
    }

    // Compute the resolution of the requested mip level.
    int w = part.topwidth, h = part.topheight;
    if (part.levelmode == Imf::MIPMAP_LEVELS) {
        while (miplevel--) {
            if (part.roundingmode == Imf::ROUND_DOWN) {
                w = w / 2;
                h = h / 2;
            } else {
                w = (w + 1) / 2;
                h = (h + 1) / 2;
            }
            w = std::max (1, w);
            h = std::max (1, h);
        }
    } else if (part.levelmode == Imf::RIPMAP_LEVELS) {
        // FIXME
    } else {
        ASSERT(0);
    }

    m_spec.width = w;
    m_spec.height = h;
    // N.B. OpenEXR doesn't support data and display windows per MIPmap
    // level.  So always take from the top level.
    Imath::Box2i datawindow = part.top_datawindow;
    Imath::Box2i displaywindow = part.top_displaywindow;
    m_spec.x = datawindow.min.x;
    m_spec.y = datawindow.min.y;
    if (m_miplevel == 0) {
        m_spec.full_x = displaywindow.min.x;
        m_spec.full_y = displaywindow.min.y;
        m_spec.full_width = displaywindow.max.x - displaywindow.min.x + 1;
        m_spec.full_height = displaywindow.max.y - displaywindow.min.y + 1;
    } else {
        m_spec.full_x = m_spec.x;
        m_spec.full_y = m_spec.y;
        m_spec.full_width = m_spec.width;
        m_spec.full_height = m_spec.height;
    }
    if (part.cubeface) {
        m_spec.full_width = w;
        m_spec.full_height = w;
    }
    newspec = m_spec;

    return true;
}
示例#3
0
bool
OpenEXRInput::read_native_tiles (int xbegin, int xend, int ybegin, int yend,
                                 int zbegin, int zend, 
                                 int chbegin, int chend, void *data)
{
    chend = clamp (chend, chbegin+1, m_spec.nchannels);
#if 0
    std::cerr << "openexr rnt " << xbegin << ' ' << xend << ' ' << ybegin 
              << ' ' << yend << ", chans " << chbegin
              << "-" << (chend-1) << "\n";
#endif
    if (! (m_input_tiled || m_tiled_input_part) ||
        ! m_spec.valid_tile_range (xbegin, xend, ybegin, yend, zbegin, zend)) {
        error ("called OpenEXRInput::read_native_tiles without an open file");
        return false;
    }

    // Compute where OpenEXR needs to think the full buffers starts.
    // OpenImageIO requires that 'data' points to where the client wants
    // to put the pixels being read, but OpenEXR's frameBuffer.insert()
    // wants where the address of the "virtual framebuffer" for the
    // whole image.
    const PartInfo &part (m_parts[m_subimage]);
    size_t pixelbytes = m_spec.pixel_bytes (chbegin, chend, true);
    int firstxtile = (xbegin-m_spec.x) / m_spec.tile_width;
    int firstytile = (ybegin-m_spec.y) / m_spec.tile_height;
    // clamp to the image edge
    xend = std::min (xend, m_spec.x+m_spec.width);
    yend = std::min (yend, m_spec.y+m_spec.height);
    zend = std::min (zend, m_spec.z+m_spec.depth);
    // figure out how many tiles we need
    int nxtiles = (xend - xbegin + m_spec.tile_width - 1) / m_spec.tile_width;
    int nytiles = (yend - ybegin + m_spec.tile_height - 1) / m_spec.tile_height;
    int whole_width = nxtiles * m_spec.tile_width;
    int whole_height = nytiles * m_spec.tile_height;
    
    boost::scoped_array<char> tmpbuf;
    void *origdata = data;
    if (whole_width != (xend-xbegin) || whole_height != (yend-ybegin)) {
        // Deal with the case of reading not a whole number of tiles --
        // OpenEXR will happily overwrite user memory in this case.
        tmpbuf.reset (new char [nxtiles * nytiles * m_spec.tile_bytes(true)]);
        data = &tmpbuf[0];
    }
    char *buf = (char *)data
              - xbegin * pixelbytes
              - ybegin * pixelbytes * m_spec.tile_width * nxtiles;

    try {
        Imf::FrameBuffer frameBuffer;
        size_t chanoffset = 0;
        for (int c = chbegin;  c < chend;  ++c) {
            size_t chanbytes = m_spec.channelformat(c).size();
            frameBuffer.insert (m_spec.channelnames[c].c_str(),
                                Imf::Slice (part.pixeltype[c],
                                            buf + chanoffset, pixelbytes,
                                            pixelbytes*m_spec.tile_width*nxtiles));
            chanoffset += chanbytes;
        }
        if (m_input_tiled) {
            m_input_tiled->setFrameBuffer (frameBuffer);
            m_input_tiled->readTiles (firstxtile, firstxtile+nxtiles-1,
                                      firstytile, firstytile+nytiles-1,
                                      m_miplevel, m_miplevel);
#ifdef USE_OPENEXR_VERSION2
        } else if (m_tiled_input_part) {
            m_tiled_input_part->setFrameBuffer (frameBuffer);
            m_tiled_input_part->readTiles (firstxtile, firstxtile+nxtiles-1,
                                           firstytile, firstytile+nytiles-1,
                                           m_miplevel, m_miplevel);
#endif
        } else {
            ASSERT (0);
        }
        if (data != origdata) {
            stride_t user_scanline_bytes = (xend-xbegin) * pixelbytes;
            stride_t scanline_stride = nxtiles*m_spec.tile_width*pixelbytes;
            for (int y = ybegin;  y < yend;  ++y)
                memcpy ((char *)origdata+(y-ybegin)*scanline_stride,
                        (char *)data+(y-ybegin)*scanline_stride,
                        user_scanline_bytes);
        }
    }
    catch (const std::exception &e) {
        error ("Failed OpenEXR read: %s", e.what());
        return false;
    }

    return true;
}
示例#4
0
bool
OpenEXRInput::open (const std::string &name, ImageSpec &newspec)
{
    // Quick check to reject non-exr files
    bool tiled;
    if (! Imf::isOpenExrFile (name.c_str(), tiled))
        return false;

    m_spec = ImageSpec(); // Clear everything with default constructor
    
    // Unless otherwise specified, exr files are assumed to be linear.
    m_spec.attribute ("oiio:ColorSpace", "Linear");
    
    try {
        if (tiled) {
            m_input_tiled = new Imf::TiledInputFile (name.c_str());
            m_header = &(m_input_tiled->header());
        } else {
            m_input_scanline = new Imf::InputFile (name.c_str());
            m_header = &(m_input_scanline->header());
        }
    }
    catch (const std::exception &e) {
        error ("OpenEXR exception: %s", e.what());
        return false;
    }
    if (! m_input_scanline && ! m_input_tiled) {
        error ("Unknown error opening EXR file");
        return false;
    }

    Imath::Box2i datawindow = m_header->dataWindow();
    m_spec.x = datawindow.min.x;
    m_spec.y = datawindow.min.y;
    m_spec.z = 0;
    m_spec.width = datawindow.max.x - datawindow.min.x + 1;
    m_spec.height = datawindow.max.y - datawindow.min.y + 1;
    m_spec.depth = 1;
    m_topwidth = m_spec.width;      // Save top-level mipmap dimensions
    m_topheight = m_spec.height;
    Imath::Box2i displaywindow = m_header->displayWindow();
    m_spec.full_x = displaywindow.min.x;
    m_spec.full_y = displaywindow.min.y;
    m_spec.full_z = 0;
    m_spec.full_width = displaywindow.max.x - displaywindow.min.x + 1;
    m_spec.full_height = displaywindow.max.y - displaywindow.min.y + 1;
    m_spec.full_depth = 1;
    if (tiled) {
        m_spec.tile_width = m_input_tiled->tileXSize();
        m_spec.tile_height = m_input_tiled->tileYSize();
    } else {
        m_spec.tile_width = 0;
        m_spec.tile_height = 0;
    }
    m_spec.tile_depth = 1;
    query_channels ();   // also sets format

    m_nsubimages = 1;
    if (tiled) {
        // FIXME: levelmode
        m_levelmode = m_input_tiled->levelMode();
        m_roundingmode = m_input_tiled->levelRoundingMode();
        if (m_levelmode == Imf::MIPMAP_LEVELS) {
            m_nmiplevels = m_input_tiled->numLevels();
            m_spec.attribute ("openexr:roundingmode", m_roundingmode);
        } else if (m_levelmode == Imf::RIPMAP_LEVELS) {
            m_nmiplevels = std::max (m_input_tiled->numXLevels(),
                                     m_input_tiled->numYLevels());
            m_spec.attribute ("openexr:roundingmode", m_roundingmode);
        } else {
            m_nmiplevels = 1;
        }
    } else {
        m_levelmode = Imf::ONE_LEVEL;
        m_nmiplevels = 1;
    }

    const Imf::EnvmapAttribute *envmap;
    envmap = m_header->findTypedAttribute<Imf::EnvmapAttribute>("envmap");
    if (envmap) {
        m_cubeface = (envmap->value() == Imf::ENVMAP_CUBE);
        m_spec.attribute ("textureformat", m_cubeface ? "CubeFace Environment" : "LatLong Environment");
        // OpenEXR conventions for env maps
        if (! m_cubeface)
            m_spec.attribute ("oiio:updirection", "y");
        m_spec.attribute ("oiio:sampleborder", 1);
        // FIXME - detect CubeFace Shadow?
    } else {
        m_cubeface = false;
        if (tiled && m_levelmode == Imf::MIPMAP_LEVELS)
            m_spec.attribute ("textureformat", "Plain Texture");
        // FIXME - detect Shadow
    }

    const Imf::CompressionAttribute *compressattr;
    compressattr = m_header->findTypedAttribute<Imf::CompressionAttribute>("compression");
    if (compressattr) {
        const char *comp = NULL;
        switch (compressattr->value()) {
        case Imf::NO_COMPRESSION    : comp = "none"; break;
        case Imf::RLE_COMPRESSION   : comp = "rle"; break;
        case Imf::ZIPS_COMPRESSION  : comp = "zip"; break;
        case Imf::ZIP_COMPRESSION   : comp = "zip"; break;
        case Imf::PIZ_COMPRESSION   : comp = "piz"; break;
        case Imf::PXR24_COMPRESSION : comp = "pxr24"; break;
#ifdef IMF_B44_COMPRESSION
            // The enum Imf::B44_COMPRESSION is not defined in older versions
            // of OpenEXR, and there are no explicit version numbers in the
            // headers.  BUT this other related #define is present only in
            // the newer version.
        case Imf::B44_COMPRESSION   : comp = "b44"; break;
        case Imf::B44A_COMPRESSION  : comp = "b44a"; break;
#endif
        default:
            break;
        }
        if (comp)
            m_spec.attribute ("compression", comp);
    }

    for (Imf::Header::ConstIterator hit = m_header->begin();
             hit != m_header->end();  ++hit) {
        const Imf::IntAttribute *iattr;
        const Imf::FloatAttribute *fattr;
        const Imf::StringAttribute *sattr;
        const Imf::M44fAttribute *mattr;
        const Imf::V3fAttribute *vattr;        
        const char *name = hit.name();
        std::string oname = exr_tag_to_ooio_std[name];
        if (oname.empty())   // Empty string means skip this attrib
            continue;
//        if (oname == name)
//            oname = std::string(format_name()) + "_" + oname;
        const Imf::Attribute &attrib = hit.attribute();
        std::string type = attrib.typeName();
        if (type == "string" && 
            (sattr = m_header->findTypedAttribute<Imf::StringAttribute> (name)))
            m_spec.attribute (oname, sattr->value().c_str());
        else if (type == "int" && 
            (iattr = m_header->findTypedAttribute<Imf::IntAttribute> (name)))
            m_spec.attribute (oname, iattr->value());
        else if (type == "float" && 
            (fattr = m_header->findTypedAttribute<Imf::FloatAttribute> (name)))
            m_spec.attribute (oname, fattr->value());
        else if (type == "m44f" && 
            (mattr = m_header->findTypedAttribute<Imf::M44fAttribute> (name)))
            m_spec.attribute (oname, TypeDesc::TypeMatrix, &(mattr->value()));
        else if (type == "v3f" &&
                 (vattr = m_header->findTypedAttribute<Imf::V3fAttribute> (name)))
            m_spec.attribute (oname, TypeDesc::TypeVector, &(vattr->value()));
        else {
#if 0
            std::cerr << "  unknown attribute " << type << ' ' << name << "\n";
#endif
        }
    }

    m_subimage = 0;
    m_miplevel = 0;
    newspec = m_spec;
    return true;
}