From e55259e8d7e400b29dd1e5a6247d3dc82d0c6417 Mon Sep 17 00:00:00 2001
From: peri4 <peri4ko@yandex.ru>
Date: Thu, 27 May 2021 10:21:21 +0300
Subject: [PATCH] Graphic LODoptimization improvements - now draw only points
 in visible rect

---
 libs/graphic/graphic.cpp          | 70 ++++++++++++++++++++++---------
 utils/qpicalculator/mainwindow.ui | 22 ++++++----
 2 files changed, 64 insertions(+), 28 deletions(-)

diff --git a/libs/graphic/graphic.cpp b/libs/graphic/graphic.cpp
index 15fb527..c3e9e9d 100644
--- a/libs/graphic/graphic.cpp
+++ b/libs/graphic/graphic.cpp
@@ -1202,7 +1202,6 @@ void Graphic::drawGraphics() {
 	QTransform mat = painter->transform();
 	painter->resetTransform();
 	painter->setWorldMatrixEnabled(false);
-	QPolygonF cpol;
 	QPen pen;
 	for (int i = 0; i < graphics.size(); ++i) {
 		GraphicType & t(graphics[i]);
@@ -1214,28 +1213,59 @@ void Graphic::drawGraphics() {
 			int gpcnt = src_pol.size();
 			qreal range = src_pol.back().x() - src_pol.front().x();
 			qreal ppp = (gpcnt * selrect.width() / qMax(range, 1.E-9) / cwid);
-			lod = qBound<int>(0, qFloor(log2(ppp) - 2), src_lod.size());
-			//qDebug() << "draw lod" << lod;
+			lod = qBound<int>(0, qFloor(log2(ppp) - 1), src_lod.size());
+			//qDebug() << "draw lod" << lod << src_lod[lod - 1].size();
 		}
 		QPolygonF & rpol(lod == 0 ? src_pol : src_lod[lod - 1]);
-		pen = t.pen;
-		if (qRound(pen.widthF()) == pen.widthF()) pen.setWidth(pen.width()*thick);
-		else pen.setWidthF(pen.widthF()*thick);
-		pen.setCosmetic(true);
-		if (t.lines) {
-			painter->setPen(pen);
-			if (t.fill) {
-				cpol = rpol;
-				painter->setBrush(t.fill_color);
-				painter->drawPolygon(mat.map(cpol));
-			} else
-				painter->drawPolyline(mat.map(rpol));
+		int ind_start = -1, ind_end = -1;
+		if (m_LODOptimization) {
+			qreal xs = selrect.left(), xe = selrect.right(), _offset = 2. / cwid * selrect.width();
+			xs -= _offset; xe += _offset;
+			for (int i = 0; i < rpol.size(); ++i) {
+				qreal px = rpol[i].x();
+				if (px < xs) continue;
+				if (ind_start < 0)
+					ind_start = qMax(0, i - 1);
+				if (px > xe && ind_end < 0) {
+					ind_end = qMin(rpol.size(), i + 1);
+					break;
+				}
+			}
+			if (ind_start < 0) ind_start = 0;
+			if (ind_end < 0) ind_end = rpol.size();
+			//qDebug() << "bound" << ind_start << ind_end << rpol.size();
+		} else {
+			ind_start = 0;
+			ind_end = rpol.size();
 		}
-		if (t.points) {
-			if (qRound(t.pointWidth) == t.pointWidth) pen.setWidth(qRound(t.pointWidth*thick));
-			else pen.setWidthF(t.pointWidth*thick);
-			painter->setPen(pen);
-			painter->drawPoints(mat.map(rpol));
+		int polsize = ind_end - ind_start;
+		if (polsize > 0) {
+			QPolygonF cpol;
+			if (m_LODOptimization && polsize < rpol.size()) {
+				cpol.resize(polsize);
+				memcpy(cpol.data(), &(rpol[ind_start]), polsize * sizeof(QPointF));
+				//qDebug() << "copy" << polsize;
+			} else {
+				cpol = rpol;
+			}
+			pen = t.pen;
+			if (qRound(pen.widthF()) == pen.widthF()) pen.setWidth(pen.width()*thick);
+			else pen.setWidthF(pen.widthF()*thick);
+			pen.setCosmetic(true);
+			if (t.lines) {
+				painter->setPen(pen);
+				if (t.fill) {
+					painter->setBrush(t.fill_color);
+					painter->drawPolygon(mat.map(cpol));
+				} else
+					painter->drawPolyline(mat.map(cpol));
+			}
+			if (t.points) {
+				if (qRound(t.pointWidth) == t.pointWidth) pen.setWidth(qRound(t.pointWidth*thick));
+				else pen.setWidthF(t.pointWidth*thick);
+				painter->setPen(pen);
+				painter->drawPoints(mat.map(cpol));
+			}
 		}
 	}
 	painter->setWorldMatrixEnabled(true);
diff --git a/utils/qpicalculator/mainwindow.ui b/utils/qpicalculator/mainwindow.ui
index dae08e6..b3e0c6c 100644
--- a/utils/qpicalculator/mainwindow.ui
+++ b/utils/qpicalculator/mainwindow.ui
@@ -151,7 +151,7 @@
           <item>
            <widget class="QToolButton" name="buttonVarAdd">
             <property name="icon">
-             <iconset resource="../../utils/qad_utils.qrc">
+             <iconset resource="../../libs/qglview/qglview.qrc">
               <normaloff>:/icons/list-add.png</normaloff>:/icons/list-add.png</iconset>
             </property>
            </widget>
@@ -162,7 +162,7 @@
              <bool>false</bool>
             </property>
             <property name="icon">
-             <iconset resource="../../utils/qad_utils.qrc">
+             <iconset resource="../../libs/blockview/qad_blockview.qrc">
               <normaloff>:/icons/edit-delete.png</normaloff>:/icons/edit-delete.png</iconset>
             </property>
             <property name="shortcut">
@@ -192,7 +192,7 @@
              <bool>false</bool>
             </property>
             <property name="icon">
-             <iconset resource="../../utils/qad_utils.qrc">
+             <iconset resource="../../libs/application/qad_application.qrc">
               <normaloff>:/icons/edit-clear.png</normaloff>:/icons/edit-clear.png</iconset>
             </property>
            </widget>
@@ -224,7 +224,7 @@
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
-          <widget class="QWidget" name="">
+          <widget class="QWidget" name="layoutWidget">
            <layout class="QHBoxLayout" name="horizontalLayout_2">
             <item>
              <widget class="QTreeWidget" name="treeGraphics">
@@ -272,7 +272,7 @@
               <item>
                <widget class="QToolButton" name="buttonGraphicAdd">
                 <property name="icon">
-                 <iconset resource="../../utils/qad_utils.qrc">
+                 <iconset resource="../../libs/qglview/qglview.qrc">
                   <normaloff>:/icons/list-add.png</normaloff>:/icons/list-add.png</iconset>
                 </property>
                </widget>
@@ -283,7 +283,7 @@
                  <bool>false</bool>
                 </property>
                 <property name="icon">
-                 <iconset resource="../../utils/qad_utils.qrc">
+                 <iconset resource="../../libs/blockview/qad_blockview.qrc">
                   <normaloff>:/icons/edit-delete.png</normaloff>:/icons/edit-delete.png</iconset>
                 </property>
                 <property name="shortcut">
@@ -313,7 +313,7 @@
                  <bool>false</bool>
                 </property>
                 <property name="icon">
-                 <iconset resource="../../utils/qad_utils.qrc">
+                 <iconset resource="../../libs/application/qad_application.qrc">
                   <normaloff>:/icons/edit-clear.png</normaloff>:/icons/edit-clear.png</iconset>
                 </property>
                </widget>
@@ -372,7 +372,13 @@
   </customwidget>
  </customwidgets>
  <resources>
-  <include location="../../utils/qad_utils.qrc"/>
+  <include location="../../libs/application/qad_application.qrc"/>
+  <include location="../../libs/blockview/qad_blockview.qrc"/>
+  <include location="../../libs/qglview/qglview.qrc"/>
+  <include location="qpicalculator.qrc"/>
+  <include location="../../libs/application/qad_application.qrc"/>
+  <include location="../../libs/blockview/qad_blockview.qrc"/>
+  <include location="../../libs/qglview/qglview.qrc"/>
   <include location="qpicalculator.qrc"/>
  </resources>
  <connections/>