FlamePanel imgPanel = getFlamePanel();
Rectangle bounds = imgPanel.getImageBounds();
int width = bounds.width;
int height = bounds.height;
if (width >= 16 && height >= 16) {
RenderInfo info = new RenderInfo(width, height, RenderMode.PREVIEW);
Flame flame = getFlame();
if (flame != null) {
double oldSpatialFilterRadius = flame.getSpatialFilterRadius();
double oldSampleDensity = flame.getSampleDensity();
try {
double wScl = (double) info.getImageWidth() / (double) flame.getWidth();
double hScl = (double) info.getImageHeight() / (double) flame.getHeight();
flame.setPixelsPerUnit((wScl + hScl) * 0.5 * flame.getPixelsPerUnit());
flame.setWidth(info.getImageWidth());
flame.setHeight(info.getImageHeight());
FlameRenderer renderer = new FlameRenderer(flame, Prefs.getPrefs(), false, false);
renderer.setProgressUpdater(null);
flame.setSampleDensity(Prefs.getPrefs().getTinaRenderRealtimeQuality() * 6.0);
flame.setSpatialFilterRadius(0.0);