Risovach

Paint(canvas, opts):

• buffer (ro)
• getLayerBuffer([id]) (current if no id)
• layer_numb (ro)
• layer_id
• forEachLayer(func(i, buffer))
• toolAdd(name, obj)
• toolSet(name)
• toolUsePrevious()
• undo()
• redo()
• redoAll(forceLayer)
• history
• applyBuffer() for internal use (with tools etc.)
• refresh(mouse_x,mouse_y)
• refreshRegion(x,y,w,h,mouse_x,mouse_y)
• refreshRegionCoords(x0,y0,x1,y1, mouse_x,mouse_y)
• refreshRegionCoordsRadius(x0,y0,x1,y1,r, mouse_x,mouse_y)
• refreshRect
• tryToUpdate(mouse_x,mouse_y)
• SimpleEventWrapper opts
• layer_numb (optional, 4 default)
• wacom_plugin (optional)
• onLayerChange (optional)

History(paint):

• action ("none" || "undo" || "redo")
• add(newStep)
• unshift()
• undo()
• redo(forceLayer)

Tool(paint):

• events
• blendMode (get)*
• cursor{img, xo, yo}*

HistoryStep(paint, tool, ...):

• capture(paint, [force_layer_id])
• undo(paint)
• redo(paint)