Improve bloom

- add a quality option
- remove the ping-pong code, we'll disable for GPU that don't work
  instead.
- improve quality by doing a better first downscale
  (using a 5x5 gaussian).
- improve performance by using a 9 tap filter instead of 13 for
  in most cases
- fix usages of setMinMaxLevels as it resets the base level to "min"

libs/viewer/src/Settings_generated.cpp

@@ -249,6 +249,8 @@ int parse(jsmntok_t const* tokens, int i, const char* jsonChunk, BloomOptions* o
             i = parse(tokens, i + 1, jsonChunk, &out->enabled);
         } else if (compare(tok, jsonChunk, "highlight") == 0) {
             i = parse(tokens, i + 1, jsonChunk, &out->highlight);
+        } else if (compare(tok, jsonChunk, "quality") == 0) {
+            i = parse(tokens, i + 1, jsonChunk, &out->quality);
         } else if (compare(tok, jsonChunk, "lensFlare") == 0) {
             i = parse(tokens, i + 1, jsonChunk, &out->lensFlare);
         } else if (compare(tok, jsonChunk, "starburst") == 0) {
@@ -291,6 +293,7 @@ std::ostream& operator<<(std::ostream& out, const BloomOptions& in) {
         << "\"threshold\": " << to_string(in.threshold) << ",\n"
         << "\"enabled\": " << to_string(in.enabled) << ",\n"
         << "\"highlight\": " << (in.highlight) << ",\n"
+        << "\"quality\": " << (in.quality) << ",\n"
         << "\"lensFlare\": " << to_string(in.lensFlare) << ",\n"
         << "\"starburst\": " << to_string(in.starburst) << ",\n"
         << "\"chromaticAberration\": " << (in.chromaticAberration) << ",\n"