Function requestRender

src/ChartGPU.ts:581–634

()

  };

  const requestRender = (): void => {
    if (disposed) return;
    isDirty = true;
    if (scheduledRaf !== null) return;

    scheduledRaf = requestAnimationFrame(() => {
      scheduledRaf = null;
      if (disposed) return;

      // Record frame timestamp BEFORE rendering
      const frameStartTime = performance.now();
      frameTimestamps[frameTimestampIndex] = frameStartTime;
      frameTimestampIndex = (frameTimestampIndex + 1) % FRAME_BUFFER_SIZE;
      if (frameTimestampCount < FRAME_BUFFER_SIZE) {
        frameTimestampCount++;
      }
      totalFrames++;

      // Frame drop detection (only after first frame)
      if (lastFrameTime > 0) {
        const deltaTime = frameStartTime - lastFrameTime;
        if (deltaTime > EXPECTED_FRAME_TIME_MS * FRAME_DROP_THRESHOLD_MULTIPLIER) {
          totalDroppedFrames++;
          consecutiveDroppedFrames++;
          lastDropTimestamp = frameStartTime;
        } else {
          // Reset consecutive counter on successful frame
          consecutiveDroppedFrames = 0;
        }
      }
      lastFrameTime = frameStartTime;

      // Requirement: on RAF tick, call resize() first.
      resizeInternal(false);
      
      if (isDirty) {
        isDirty = false;
        coordinator?.render();
      }

      const frameEndTime = performance.now();
      lastCPUTime = frameEndTime - frameStartTime;

      // Calculate and emit performance metrics
      const metrics = calculatePerformanceMetrics();
      for (const callback of performanceUpdateCallbacks) {
        try {
          callback(metrics);
        } catch (error) {
          console.error('Error in performance update callback:', error);
        }
      }
    });
  };

  const unbindCoordinatorInteractionXChange = (): void => {
    if (!unsubscribeCoordinatorInteractionXChange) return;