Game Loop and Rendering

Runtime Lifecycle

Core entry points:

• init(width, height, ...)
• run(update, draw)
• flip()
• show()
• quit()
• reset()

run(update, draw) calls update, then draw, then flip on a timer.

Use show() when you need a frame-advance call outside run.

Drawing APIs

Primary screen-space drawing functions:

• cls, pset, pget
• line
• rect, rectb
• circ, circb
• elli, ellib
• tri, trib
• fill
• text
• blt, bltm

Camera, Clip, and Palette

• camera(x, y) shifts drawing coordinates.
• clip(x, y, w, h) constrains drawing writes.
• pal(col1, col2) remaps palette colors (or resets mapping when called without args).
• dither(alpha) sets runtime dithering state.

Text Behavior

text(x, y, s, col) renders the built-in 4x6 glyph set.

• Newline (\n) moves to the next text row.
• ASCII code points 32..127 are rendered.
• Out-of-range characters are skipped.

Rendering in Flutter

Use FlutterxelView in your widget tree.

Common options:

• pixelScale
• palette
• backgroundColor
• captureInput
• keyboardMapping

FlutterxelView repaints from frameBufferSnapshot() updates.