Creates a performance overlay render object.
The optionsMask, rasterizerThreshold and checkerboardRasterCacheImages
arguments must not be null.
Source
RenderPerformanceOverlay({
int optionsMask: 0,
int rasterizerThreshold: 0,
bool checkerboardRasterCacheImages: false,
}) : _optionsMask = optionsMask,
_rasterizerThreshold = rasterizerThreshold,
_checkerboardRasterCacheImages = checkerboardRasterCacheImages {
assert(optionsMask != null);
assert(rasterizerThreshold != null);
assert(checkerboardRasterCacheImages != null);
}