BitMiracle.LibJpeg.Classic.jpeg_compress_struct.jpeg_write_tables C# (CSharp) Method

jpeg_compress_struct Class Documentation Show file Open project: prepare/HTML-Renderer

jpeg_write_tables() public method

Alternate compression function: just write an abbreviated table file.

Before calling this, all parameters and a data destination must be set up.
To produce a pair of files containing abbreviated tables and abbreviated image data, one would proceed as follows:

Initialize JPEG object
 Set JPEG parameters
 Set destination to table file
 jpeg_write_tables();
 Set destination to image file
 jpeg_start_compress(false);
 Write data...
 jpeg_finish_compress();

jpeg_write_tables has the side effect of marking all tables written (same as jpeg_suppress_tables(true)). Thus a subsequent jpeg_start_compress will not re-emit the tables unless it is passed write_all_tables=true.

public jpeg_write_tables ( ) : void
return	void

        public void jpeg_write_tables()
        {
            if (m_global_state != JpegState.CSTATE_START)
                ERREXIT(J_MESSAGE_CODE.JERR_BAD_STATE, (int)m_global_state);

            /* (Re)initialize error mgr and destination modules */
            m_err.reset_error_mgr();
            m_dest.init_destination();

            /* Initialize the marker writer ... bit of a crock to do it here. */
            m_marker = new jpeg_marker_writer(this);

            /* Write them tables! */
            m_marker.write_tables_only();

            /* And clean up. */
            m_dest.term_destination();
        }

jpeg_compress_struct

add_huff_table

fill_a_scan

fill_dc_scans

fill_scans

initial_setup

initialize

jinit_c_main_controller

jinit_c_master_control

jinit_compress_master

jpeg_abort_compress

jpeg_add_quant_table