Mathpad

MathPad is a simple raster image creation app. It is an incredibly simple cross-platform alternative to the Microsoft Paint. Best used with a graphics tablet.

Status

Simple single-color drawing is available. There is a circular brush tool, an "eraser" (brush of the background color), and simple geometric primitives.

Features:

• Stroke width slider
• Circular brush
• Line tool
• Rectangle tool
• Filled rectangle tool
• Circle tool
• Filled circle tool
• Ellipse tool
• Filled ellipse tool
• Circular eraser
• Clear all tool

Possible improvements:

• Replace SDL2_gfx with a better implementation of geometric primitives
• Merge the ellipse and circle tools
• Add two modes to the ellipse and circle tools: a bounding box mode and a center + radius mode
• Add snapping
• Add grids
• Add rulers
• Add more tools
• Add a color selector
• Add the ability to export and import images
• Add layers
• Add undo-redo
• Add transparency support
• Add filters/shaders/other image manipulation functions
• etc. etc. ad nauseam
• Re-implement Adobe Photoshop and GIMP in any other capacity

Known issues:

• Ellipse tool does not take stroke width into account due to a shortcoming of SDL2_gfx
• Flat ellipses are drawn wrongly on the ends of the major axis due to a bug in SDL2_gfx
• Filled ellipse tool only draws circles due to a bug in SDL2_gfx

Building

MathPad uses Shake. Its sole dependency is SLY. In addition to the system-defined lib and include paths, the build system looks for the SLY shared library in ./dep/lib, and for the SLY header file (./src/lib/SLY.hpp) in ./dep/include.

After installing the dependencies, simply run ./build.sh from the project folder.

Manual

Use ./run.sh to run the application.