Add smaller resize handle sizes

tests/performance/handles/main.cpp

@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Synthetic raster viewport workload, not a full editor latency benchmark.
+#include <QApplication>
+#include <QGraphicsView>
+#include <QGraphicsRectItem>
+#include <QElapsedTimer>
+#include <QPainter>
+#include <cstdio>
+#include <ctime>
+#ifdef Q_OS_WIN
+#include <windows.h>
+#include <psapi.h>
+#endif
+#include "QetGraphicsItemModeler/qetgraphicshandleritem.h"
+
+static double cpuMilliseconds() {
+#ifdef Q_OS_WIN
+ FILETIME created,exited,kernel,user;
+ if(GetProcessTimes(GetCurrentProcess(),&created,&exited,&kernel,&user)) {
+  ULARGE_INTEGER k,u; k.LowPart=kernel.dwLowDateTime;k.HighPart=kernel.dwHighDateTime;
+  u.LowPart=user.dwLowDateTime;u.HighPart=user.dwHighDateTime;
+  return double(k.QuadPart+u.QuadPart)/10000;
+ }
+ return 0;
+#else
+ return double(std::clock())*1000/CLOCKS_PER_SEC;
+#endif
+}
+
+int main(int argc,char **argv) {
+ QApplication app(argc,argv);
+ const qreal size=QString::fromLocal8Bit(argv[1]).toDouble();
+ const int count=QString::fromLocal8Bit(argv[2]).toInt();
+ const QString operation=QString::fromLocal8Bit(argv[3]);
+ QGraphicsScene scene; scene.setSceneRect(-2000,-2000,4000,4000);
+ QList<QGraphicsRectItem *> objects;
+ for(int i=0;i<count/4;++i) {
+  auto *object=scene.addRect(0,0,32,24,QPen(Qt::black),QBrush(Qt::lightGray));
+  object->setPos((i%32)*36-576,(i/32)*28-224); objects<<object;
+  for(auto *handle:QetGraphicsHandlerItem::handlerForPoint({{0,0},{32,0},{32,24},{0,24}},size)) {
+   handle->setParentItem(object); handle->setColor(Qt::darkGreen);
+  }
+ }
+ QGraphicsView view(&scene); view.resize(1280,800); view.setSceneRect(scene.sceneRect());
+ view.show(); QApplication::processEvents();
+ QImage image(1280,800,QImage::Format_ARGB32_Premultiplied);
+ auto frame=[&](int i) {
+  if(operation=="zoom") {view.resetTransform();view.scale(0.75+0.005*(i%60),0.75+0.005*(i%60));}
+  if(operation=="pan") view.centerOn((i%60)*2,0);
+  if(operation=="manipulate") for(auto *object:objects) {
+   object->setRotation(i%30); object->setRect(0,0,32+(i%8),24); object->moveBy(i%2?1:-1,0);
+  }
+  image.fill(Qt::white); QPainter painter(&image); view.render(&painter);
+ };
+ for(int i=0;i<20;++i) frame(i);
+ std::puts("size,handles,operation,repeat,ms_per_frame,cpu_ms_per_frame,working_set_bytes");
+ for(int repeat=0;repeat<7;++repeat) {
+  const auto cpu=cpuMilliseconds(); QElapsedTimer timer; timer.start();
+  for(int i=0;i<120;++i) frame(i);
+  const double elapsed=timer.nsecsElapsed()/1e6/120;
+  const double cpuElapsed=(cpuMilliseconds()-cpu)/120;
+  unsigned long long memory=0;
+#ifdef Q_OS_WIN
+  PROCESS_MEMORY_COUNTERS counters{}; counters.cb=sizeof(counters);
+  if(GetProcessMemoryInfo(GetCurrentProcess(),&counters,sizeof(counters))) memory=counters.WorkingSetSize;
+#endif
+  std::printf("%.2f,%d,%s,%d,%.6f,%.6f,%llu\n",size,count,qPrintable(operation),repeat,elapsed,cpuElapsed,memory);
+ }
+}