Пример #1
0
bool
OpenEXROutput::write_tile (int x, int y, int z,
                           TypeDesc format, const void *data,
                           stride_t xstride, stride_t ystride, stride_t zstride)
{
    bool native = (format == TypeDesc::UNKNOWN);
    size_t pixel_bytes = m_spec.pixel_bytes (native);
    if (native && xstride == AutoStride)
        xstride = (stride_t) pixel_bytes;
    m_spec.auto_stride (xstride, ystride, zstride, format, spec().nchannels,
                        spec().tile_width, spec().tile_height);
    data = to_native_tile (format, data, xstride, ystride, zstride, m_scratch);

    // 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.
    char *buf = (char *)data
              - x * pixel_bytes
              - y * pixel_bytes * 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, pixel_bytes,
                                            pixel_bytes*m_spec.tile_width));
            chanoffset += chanbytes;
        }
        m_output_tiled->setFrameBuffer (frameBuffer);
        m_output_tiled->writeTile ((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 ("Failed OpenEXR write: %s", e.what());
        return false;
    }

    return true;
}
Пример #2
0
bool
OpenEXROutput::write_tiles (int xbegin, int xend, int ybegin, int yend,
                            int zbegin, int zend, TypeDesc format,
                            const void *data, stride_t xstride,
                            stride_t ystride, stride_t zstride)
{
//    std::cerr << "exr::write_tiles " << xbegin << ' ' << xend 
//              << ' ' << ybegin << ' ' << yend << "\n";
    if (! m_output_tiled ||
        ! m_spec.valid_tile_range (xbegin, xend, ybegin, yend, zbegin, zend))
        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.
    bool native = (format == TypeDesc::UNKNOWN);
    size_t user_pixelbytes = m_spec.pixel_bytes (native);
    size_t pixelbytes = m_spec.pixel_bytes (true);
    if (native && xstride == AutoStride)
        xstride = (stride_t) user_pixelbytes;
    m_spec.auto_stride (xstride, ystride, zstride, format, spec().nchannels,
                        (xend-xbegin), (yend-ybegin));
    data = to_native_rectangle (xbegin, xend, ybegin, yend, zbegin, zend,
                                format, data, xstride, ystride, zstride,
                                m_scratch);

    // 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);
    int firstxtile = (xbegin-m_spec.x) / m_spec.tile_width;
    int firstytile = (ybegin-m_spec.y) / m_spec.tile_height;
    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;

    std::vector<char> padded;
    int width = nxtiles*m_spec.tile_width;
    int height = nytiles*m_spec.tile_height;
    stride_t widthbytes = width * pixelbytes;
    if (width != (xend-xbegin) || height != (yend-ybegin)) {
        // If the image region is not an even multiple of the tile size,
        // we need to copy and add padding.
        padded.resize (pixelbytes * width * height, 0);
        OIIO::copy_image (m_spec.nchannels, xend-xbegin,
                                    yend-ybegin, 1, data, pixelbytes,
                                    pixelbytes, (xend-xbegin)*pixelbytes,
                                    (xend-xbegin)*(yend-ybegin)*pixelbytes,
                                    &padded[0], pixelbytes, widthbytes,
                                    height*widthbytes);
        data = &padded[0];
    }

    char *buf = (char *)data
              - xbegin * pixelbytes
              - ybegin * widthbytes;

    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,
                                            widthbytes));
            chanoffset += chanbytes;
        }
        m_output_tiled->setFrameBuffer (frameBuffer);
        m_output_tiled->writeTiles (firstxtile, firstxtile+nxtiles-1,
                                    firstytile, firstytile+nytiles-1,
                                    m_miplevel, m_miplevel);
    }
    catch (const std::exception &e) {
        error ("Failed OpenEXR write: %s", e.what());
        return false;
    }

    return true;
}