Viewerframe Mode Refresh Better [best] (2025)

; Open-source remote viewers are the most common victims of poor viewerframe refresh. A typical user reports: "Scrolling is choppy; the screen refreshes in bands."

In the world of real-time graphics rendering, video streaming, and embedded UI systems, the term "ViewerFrame Mode" sits at a specific intersection of performance and accuracy. It is not your standard double-buffered or tripple-buffered rendering loop. Instead, it often refers to a strict, "one-at-a-time" frame presentation model, commonly found in virtual appliance viewers (like Spice or RDP), medical imaging displays, digital signage, or custom RTOS graphics pipelines. viewerframe mode refresh better

void onViewerRefreshCycle() uint64_t now = getMonotonicTime(); Frame* latest = frames.getLatest(); // Adaptive refresh logic if (latest->timestamp > lastPresentTime) // Align with display vblank while (!isInVBlank()) spin_wait(0.1ms); // Present only dirty rects (not entire buffer) presentPartial(latest->damagedRects); lastPresentTime = now; regionTracker.markClean(latest->damagedRects); // Decay to 1Hz if idle if ((now - lastChangeTime) > IDLE_THRESHOLD) setRefreshRate(1.0); else setRefreshRate(getDisplayHz()); // Full sync only when active ; Open-source remote viewers are the most common

class BetterViewerFrame private: RingBuffer<Frame, 3> frames; DirtyRegionTracker regionTracker; Timer refreshTimer; public: void onSourceFrameReady(Frame& newFrame) newFrame.forceRefresh) Frame deltaFrame = newFrame.extractBlocks(dirty); frames.push(deltaFrame); Instead, it often refers to a strict, "one-at-a-time"