| colormap: ColorMapLegend | a continues numeric scaler legend bar |
| layout.grid | |
| paddingString | create a valid css padding string |
| paddingVector | |
| colorMap.legend | create a new color map legend |
| legend | create a legend element |
| measureString | |
| draw.legend | |
| rect | |
| rectangle_obj | |
| pointVector | |
| point | |
| sizeVector | |
| size | |
| offset2D | |
| line | create a line shape model |
| rasterHeatmap | Render raster image in heatmap mode |
| draw.triangle | |
| draw.circle | |
| rectangle | Draw rectangle on the canvas |
| axis.ticks | create axis tick vector data based on a given data range value |
| color_scale | scale a numeric vector as the color value vector |
| contour | |
| contour_tracing | Measure object outline via run contour tracing algorithm. |
| asciiArt | convert bitmap to ascii characters |