A canvas addon for imgui
This is an addon for imgui.
It provides a canvas, with ability to draw basic shapes, (square, rectangle, circle, ellipse, horizontal lines, vertical lines)
It also provides functionality to use the shapes as masks.
See imgui_canvas_demo.cpp for usage examples.
Update IMGUI_DIR Makefile to compile.

delete - Delete the hovered shapeup/down - Change the dimension along the hovered handleleft/right - Change angle of the hovered handle