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Compact standalone chronogram editor for Windows using OpenGL, written in good ol' VB6. Inspired byWavedrom.

Download v0.20HERE.

Why VB6 ?

• I still live in 1999
• Super fast dev cycle for GUI apps
• Small executables
• No framework, only requires a 1.3MB dll (msvbvm60.dll)
• Rather slow execution, but here we only need fast drawing
• Can't be worse than Java !
• I believe that a web browser is a program to browse the web, not an application host
• Not portable :( But should run in Wine :)

Also: No install, no registry keys.

• Markdown syntax very similar to Wavedrom's
• Fast and clean OpenGL rendering
• Drag-scroll for large chronograms
• Rulers
• Time measurements
• Popup notes (pins)
• Modifiable layout/appearence (not as flexible as Wavedrom)
• To come: Export to image (and svg ?)

• Holding Alt shows all popup notes (if enabled)
• Right click and drag to measure time
• Double left click to reset view to origin

A wave name starts withname: and a string.

A wave definition starts withwave::

• . (dot): Repeat last block (except forH andL, they becomeh and l`)
• z : Hi-Z
• x : Undefined
• l : Low
• h : High
• L : Falling with arrow
• H : Rising with arrow
• n : Clock negative
• p : Clock positive
• N : Clock negative with arrow
• P : Clock positive with arrow
• = : Data (grey)
• 0~5 : Data (colored)

Text for data zones starts withdata: and strings separated by commas.A vertical ruler can be set withruler:, a x position, and a color index.A note can be added withpin:, a x position, a color index, and a string.A wave group is started withgroup:, a string, and a color index. A group is ended withgroupend. Groups can be nested.

A block definition starts with theDEF keyword followed by the letter assigned to the block. Any text after the letter is ignored, it can be used as a comment to describe the block.

The drawing commands follow on the next line. The currently supported commands are:

• SP: Start Point. Required, defines the block's starting point for hookup. Takes x,y.
• EP: Ending Point. Required, defines the block's ending point for hookup. Takes x,y.
• L: Line. Simply draws a line. Takes x1,y1:x2,y2.
• LS: Line strip. Draws multiples lines, one connected to the other. Takes x1,y1:x2,y2:x3,y3...
• SH: Shape. Draws a filled polygon. Takes x1,y1:x2,y2:x3,y3...
• LC: Reset color to line color. Useful for colored blocks (data).

Coordinates 0,0 are top-left. Sizes should be normalized to 16x16.

For example, drawing a filled square clockwise:SH 0,0:16,0:16,16:0,16

• Might crash on badly formatted layout.txt file.
• Drag-scroll not well optimized, can be laggy on some setups. Will have to draw in a buffer and scroll the buffer instead of redrawing everything each time.