Flash

flash is Morph's lightweight direct renderer — the production default. It redraws the full window every frame: clear, draw everything, present.

How It Works

Every frame, flash takes the flattened RenderFrame and replays it from scratch:

1. Full-surface clear
2. All nodes drawn in paint order (rects, text, borders, images via the batched GL renderer)
3. Present

There is no retained state between frames — no surfaces cached on the GPU, nothing to invalidate. What you trade in redundant drawing, you get back in simplicity: no damage tracking bugs, no tile management, no stale-pixel failure modes. Flash is pixel-correct by construction.

Characteristics

Strategy	Direct, full clear each frame
Retained GPU memory	None beyond textures
Hello-world RAM @1080p	~22 MB (design target)
Binary size impact	Smallest
Correctness risk	None — full redraw can't go stale

When to Use Flash

• Default choice. It's the recommended production renderer until forge matures
• Small apps and static UIs where the whole window fits in a few thousand nodes
• Low-footprint targets where RAM matters more than present bandwidth

The cost of full-clear drawing shows up as present bandwidth: on a large static UI, flash re-uploads unchanged pixels every frame. That's the problem forge solves — but for most apps, flash's bandwidth is well within what any GPU handles at 60 Hz.

In Dev Mode

Flash is always compiled into morph_devrt. Switch to it live from DevTools → Rendering → RENDERER (Flash | Forge toggle), and watch frame stats while it runs.