| hpgs_bbox_st | A bounding box |
| hpgs_bezier_length_st | A structure for holding intermediate values for length calculations of a bezier spline |
| hpgs_color_st | An application level RGB color |
| hpgs_device_st | A virtual vector graphics device for the HPGL reader |
| hpgs_device_vtable_st | A table of virtual function implementing hpgs_device |
| hpgs_eps_device_st | A vector graphics device for drawing to an eps file |
| hpgs_font_dentry_st | A truetype font directory entry |
| hpgs_font_header_st | A truetype font header |
| hpgs_font_kern_pair_st | A ttf kerning pair |
| hpgs_font_st | A truetype font |
| hpgs_gstate_st | The vector graphics state |
| hpgs_image_st | An abstract pixel image |
| hpgs_image_vtable_st | A table of virtual function implementing hpgs_image |
| hpgs_istream_st | A virtual input stream for the HPGL reader |
| hpgs_istream_vtable_st | A table of virtual function implementing hpgs_istream |
| hpgs_matrix_st | A transformation matrix for 2D points |
| hpgs_ostream_st | A virtual output stream for the HPGL reader |
| hpgs_ostream_vtable_st | A table of virtual function implementing hpgs_istream |
| hpgs_paint_clipper_st | A collection of scanlines for mapping paths onto images |
| hpgs_paint_color_st | An image RGB color with an optional palette index |
| hpgs_paint_device_st | The pixel rendering vector graphics device |
| hpgs_paint_path_st | A stored vector path |
| hpgs_paint_scanline_st | A scanline of the pixel renderer |
| hpgs_palette_color_st | A screen RGB color as stored in a palette |
| hpgs_path_point_st | A point in a stored path |
| hpgs_plotsize_device_st | A vector graphics device for plotsize calculating |
| hpgs_point_st | A 2D point |
| hpgs_ps_media_size_st | A structure for storing a paper size |
| hpgs_reader_pcl_palette_st | A PCL palette as used by PCL push/pop palette |
| hpgs_reader_poly_point_st | A point in hte HPGL polygon buffer |
| hpgs_reader_st | A HPGL interpreter |
| hpgs_scanline_point_st | An intersection point of a path with a scanline |
1.5.6