From a97bb0be80a5a288b2cbee6a5c8ad17bde7b00c3 Mon Sep 17 00:00:00 2001
From: Mark Watkins <jedimark@users.sourceforge.net>
Date: Mon, 4 Nov 2013 16:49:48 +1000
Subject: [PATCH] printer scaling fix for Retina macs

---
 sleepyhead/Graphs/gGraphView.cpp | 44 ++++++++++++++++++++++++--------
 sleepyhead/Graphs/gGraphView.h   |  5 ++++
 sleepyhead/reports.cpp           | 15 ++++++++---
 3 files changed, 51 insertions(+), 13 deletions(-)

diff --git a/sleepyhead/Graphs/gGraphView.cpp b/sleepyhead/Graphs/gGraphView.cpp
index 0c6cf55f..e045832b 100644
--- a/sleepyhead/Graphs/gGraphView.cpp
+++ b/sleepyhead/Graphs/gGraphView.cpp
@@ -14,6 +14,9 @@
 #include <QGLPixelBuffer>
 #include <QGLFramebufferObject>
 #include <QPixmapCache>
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+#include <QWindow>
+#endif
 #include "mainwindow.h"
 
 #include "Graphs/gYAxis.h"
@@ -2086,16 +2089,22 @@ void gGraphView::DrawTextQue(QPainter &painter)
         TextQue &q = m_textque[i];
         painter.setBrush(q.color);
         painter.setRenderHint(QPainter::TextAntialiasing,q.antialias);
+        QFont font=*q.font;
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+        int fs=font.pointSize();
+        if (fs>0)
+            font.setPointSize(fs*dpr);
+        else {
+            font.setPixelSize(font.pixelSize()*dpr);
+        }
+#endif
+        painter.setFont(font);
 
         if (q.angle==0) { // normal text
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
-            QFont font=*q.font;
-            font.setPointSizeF(q.font->pointSizeF()*dpr);
-            painter.setFont(font);
 
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
             painter.drawText(q.x*dpr,q.y*dpr,q.text);
 #else
-            painter.setFont(*q.font);
             painter.drawText(q.x,q.y,q.text);
 #endif
         } else { // rotated text
@@ -2240,7 +2249,11 @@ QPixmap gGraph::renderPixmap(int w, int h, bool printing)
 
     sg->setScaleY(1.0);
 
+
     sg->makeCurrent(); // has to be current for fbo creation
+
+    float dpr=sg->devicePixelRatio();
+    sg->setDevicePixelRatio(1);
 #ifdef Q_OS_WIN
     if (pm.isNull()){
         pm=sg->renderPixmap(w,h,false);
@@ -2258,8 +2271,10 @@ QPixmap gGraph::renderPixmap(int w, int h, bool printing)
         pm=QPixmap::fromImage(sg->pbRenderPixmap(w,h));
     }
 #endif
+    sg->setDevicePixelRatio(dpr);
     //sg->doneCurrent();
     sg->trashGraphs();
+
     m_graphview=tgv;
 
     m_height=tmp;
@@ -2437,6 +2452,12 @@ gGraphView::gGraphView(QWidget *parent, gGraphView * shared) :
     m_fadedir=false;
     m_blockUpdates=false;
     use_pixmap_cache=true;
+
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    m_dpr=this->windowHandle()->devicePixelRatio();
+#else
+    m_dpr=1;
+#endif
 }
 
 gGraphView::~gGraphView()
@@ -2589,13 +2610,16 @@ void gGraphView::DrawTextQue()
                 QBrush b(q.color);
                 imgpainter.setBrush(b);
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
                 QFont font=*q.font;
-                font.setPointSizeF(q.font->pointSizeF()*dpr);
-                imgpainter.setFont(font);
-#else
-                imgpainter.setFont(*q.font);
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+                int fs=font.pointSize();
+                if (fs>0) {
+                    font.setPointSize(fs*dpr);
+                } else {
+                    font.setPixelSize(font.pixelSize()*dpr);
+                }
 #endif
+                imgpainter.setFont(font);
 
                 imgpainter.setRenderHint(QPainter::TextAntialiasing, q.antialias);
                 imgpainter.drawText(buf/2,h,q.text);
diff --git a/sleepyhead/Graphs/gGraphView.h b/sleepyhead/Graphs/gGraphView.h
index 830bb5a0..b0b7e0e4 100644
--- a/sleepyhead/Graphs/gGraphView.h
+++ b/sleepyhead/Graphs/gGraphView.h
@@ -994,6 +994,10 @@ public:
 
     void setCubeImage(QImage *);
 
+    inline const float & devicePixelRatio() { return m_dpr; }
+    void setDevicePixelRatio(float dpr) { m_dpr=dpr; }
+
+
     // Cube fun
     QVector<QImage *> cubeimg;
     GLuint cubetex;
@@ -1107,6 +1111,7 @@ protected:
     int m_offsetX;
     //! \variable Scale used to enlarge graphs when less graphs than can fit on screen.
     float m_scaleY;
+    float m_dpr;
 
     void renderSomethingFun(float alpha=1);
 
diff --git a/sleepyhead/reports.cpp b/sleepyhead/reports.cpp
index c80c271f..dc46d2fc 100644
--- a/sleepyhead/reports.cpp
+++ b/sleepyhead/reports.cpp
@@ -447,6 +447,9 @@ void Report::PrintReport(gGraphView *gv,QString name, QDate date)
 
     int page=1;
     int gcnt=0;
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    float dpr=gv->devicePixelRatio();
+#endif
     for (int i=0;i<graphs.size();i++) {
 
         if ((top+full_graph_height+normal_height) > virt_height) {
@@ -498,7 +501,11 @@ void Report::PrintReport(gGraphView *gv,QString name, QDate date)
         //painter.beginNativePainting();
         //g->showTitle(false);
         int hhh=full_graph_height-normal_height;
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
         QPixmap pm2=g->renderPixmap(virt_width,hhh,1);
+#else
+        QPixmap pm2=g->renderPixmap(virt_width,hhh,1);
+#endif
         QImage pm=pm2.toImage();//fscale);
         pm2.detach();
         //g->showTitle(true);
@@ -508,9 +515,11 @@ void Report::PrintReport(gGraphView *gv,QString name, QDate date)
 
 
         if (!pm.isNull()) {
-            painter.drawImage(0,top,pm);;
-
-
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+            painter.drawImage(QRect(0,top,pm.width(),pm.height()),pm);
+#else
+            painter.drawImage(0,top,pm);
+#endif
 
             //painter.drawImage(0,top,virt_width,full_graph_height-normal_height,pm);
         }