Fix non-integer Font Metrics in Graph (#1545)

src/common/CachedFontMetrics.h

@@ -1,60 +1,62 @@
 #ifndef CACHEDFONTMETRICS_H
 #define CACHEDFONTMETRICS_H
 
+#include "common/Metrics.h"
+
 #include <QObject>
 #include <QFont>
 #include <QFontMetrics>
 
-class CachedFontMetrics : public QObject
+template<typename T>
+class CachedFontMetrics
 {
-    Q_OBJECT
 public:
-    explicit CachedFontMetrics(QObject *parent, const QFont &font)
-        : QObject(parent),
-          mFontMetrics(font)
+    explicit CachedFontMetrics(const QFont &font)
+        : mFontMetrics(font)
     {
         memset(mWidths, 0, sizeof(mWidths));
         mHeight = mFontMetrics.height();
     }
 
-    int width(const QChar &ch)
+    T width(const QChar &ch)
     {
+        //return mFontMetrics.width(ch);
         auto unicode = ch.unicode();
         if (unicode >= 0xD800) {
             if (unicode >= 0xE000)
                 unicode -= 0xE000 - 0xD800;
             else
                 // is lonely surrogate
-                return mFontMetrics.width(ch);
+                return fetchWidth(ch);
         }
         if (!mWidths[unicode])
-            return mWidths[unicode] = mFontMetrics.width(ch);
+            return mWidths[unicode] = fetchWidth(ch);
         return mWidths[unicode];
     }
 
-    int width(const QString &text)
+    T width(const QString &text)
     {
-        int result = 0;
+        T result = 0;
         QChar temp;
         for (const QChar &ch : text) {
             if (ch.isHighSurrogate())
                 temp = ch;
             else if (ch.isLowSurrogate())
-                result += mFontMetrics.width(QString(temp) + ch);
+                result += fetchWidth(QString(temp) + ch);
             else
                 result += width(ch);
         }
         return result;
     }
 
-    int height()
+    T height()
     {
         return mHeight;
     }
 
-    int position(const QString &text, int offset)
+    T position(const QString &text, T offset)
     {
-        int curWidth = 0;
+        T curWidth = 0;
         QChar temp;
 
         for (int i = 0; i < text.length(); i++) {
@@ -63,7 +65,7 @@ public:
             if (ch.isHighSurrogate())
                 temp = ch;
             else if (ch.isLowSurrogate())
-                curWidth += mFontMetrics.width(QString(temp) + ch);
+                curWidth += fetchWidth(QString(temp) + ch);
             else
                 curWidth += width(ch);
 
@@ -76,9 +78,27 @@ public:
     }
 
 private:
-    QFontMetrics mFontMetrics;
-    uchar mWidths[0x10000 - 0xE000 + 0xD800];
-    int mHeight;
+    typename Metrics<T>::FontMetrics mFontMetrics;
+    T mWidths[0x10000 - 0xE000 + 0xD800];
+    T mHeight;
+
+    T fetchWidth(QChar c)
+    {
+#if QT_VERSION < QT_VERSION_CHECK(5,11,0)
+        return mFontMetrics.width(c);
+#else
+        return mFontMetrics.horizontalAdvance(c);
+#endif
+    }
+
+    T fetchWidth(const QString &s)
+    {
+#if QT_VERSION < QT_VERSION_CHECK(5,11,0)
+        return mFontMetrics.width(s);
+#else
+        return mFontMetrics.horizontalAdvance(s);
+#endif
+    }
 };
 
 #endif // CACHEDFONTMETRICS_H

src/common/Metrics.h

@@ -0,0 +1,26 @@
+
+#ifndef METRICS_H
+#define METRICS_H
+
+#include <QtGlobal>
+
+class QRect;
+class QRectF;
+class QFontMetrics;
+class QFontMetricsF;
+
+template<typename T> struct Metrics {};
+
+template<> struct Metrics<int>
+{
+    using Rect = QRect;
+    using FontMetrics = QFontMetrics;
+};
+
+template<> struct Metrics<qreal>
+{
+    using Rect = QRectF;
+    using FontMetrics = QFontMetricsF;
+};
+
+#endif //METRICS_H

src/common/RichTextPainter.cpp

@@ -7,15 +7,18 @@
 #include <QTextFragment>
 
 //TODO: fix performance (possibly use QTextLayout?)
-void RichTextPainter::paintRichText(QPainter *painter, int x, int y, int w, int h, int xinc,
-                                    const List &richText, CachedFontMetrics *fontMetrics)
+
+
+template<typename T>
+void RichTextPainter::paintRichText(QPainter *painter, T x, T y, T w, T h, T xinc,
+                          const List &richText, CachedFontMetrics<T> *fontMetrics)
 {
     QPen pen;
     QPen highlightPen;
     QBrush brush(Qt::cyan);
     for (const CustomRichText_t &curRichText : richText) {
-        int textWidth = fontMetrics->width(curRichText.text);
-        int backgroundWidth = textWidth;
+        T textWidth = fontMetrics->width(curRichText.text);
+        T backgroundWidth = textWidth;
         if (backgroundWidth + xinc > w)
             backgroundWidth = w - xinc;
         if (backgroundWidth <= 0) //stop drawing when going outside the specified width
@@ -32,24 +35,24 @@ void RichTextPainter::paintRichText(QPainter *painter, int x, int y, int w, int
         case FlagBackground: //background only
             if (backgroundWidth > 0 && curRichText.textBackground.alpha()) {
                 brush.setColor(curRichText.textBackground);
-                painter->fillRect(QRect(x + xinc, y, backgroundWidth, h), brush);
+                painter->fillRect(QRectF(x + xinc, y, backgroundWidth, h), brush);
             }
             break;
         case FlagAll: //color+background
             if (backgroundWidth > 0 && curRichText.textBackground.alpha()) {
                 brush.setColor(curRichText.textBackground);
-                painter->fillRect(QRect(x + xinc, y, backgroundWidth, h), brush);
+                painter->fillRect(QRectF(x + xinc, y, backgroundWidth, h), brush);
             }
             pen.setColor(curRichText.textColor);
             painter->setPen(pen);
             break;
         }
-        painter->drawText(QRect(x + xinc, y, w - xinc, h), Qt::TextBypassShaping, curRichText.text);
+        painter->drawText(typename Metrics<T>::Rect(x + xinc, y, w - xinc, h), Qt::TextBypassShaping, curRichText.text);
         if (curRichText.highlight && curRichText.highlightColor.alpha()) {
             highlightPen.setColor(curRichText.highlightColor);
             highlightPen.setWidth(curRichText.highlightWidth);
             painter->setPen(highlightPen);
-            int highlightOffsetX = curRichText.highlightConnectPrev ? -1 : 1;
+            T highlightOffsetX = curRichText.highlightConnectPrev ? -1 : 1;
             painter->drawLine(x + xinc + highlightOffsetX, y + h - 1, x + xinc + backgroundWidth - 1,
                               y + h - 1);
         }
@@ -57,6 +60,11 @@ void RichTextPainter::paintRichText(QPainter *painter, int x, int y, int w, int
     }
 }
 
+template
+void RichTextPainter::paintRichText<qreal>(QPainter *painter, qreal x, qreal y, qreal w, qreal h, qreal xinc,
+    const List &richText, CachedFontMetrics<qreal> *fontMetrics);
+
+
 /**
  * @brief RichTextPainter::htmlRichText Convert rich text in x64dbg to HTML, for use by other applications
  * @param richText The rich text to be converted to HTML format

src/common/RichTextPainter.h

@@ -2,12 +2,15 @@
 #ifndef RICHTEXTPAINTER_H
 #define RICHTEXTPAINTER_H
 
+#include "common/Metrics.h"
+
 #include <QString>
 #include <QTextDocument>
 #include <QColor>
 #include <vector>
 
-class CachedFontMetrics;
+class QFontMetricsF;
+template<typename T> class CachedFontMetrics;
 class QPainter;
 
 class RichTextPainter
@@ -35,8 +38,9 @@ public:
     typedef std::vector<CustomRichText_t> List;
 
     //functions
-    static void paintRichText(QPainter *painter, int x, int y, int w, int h, int xinc,
-                              const List &richText, CachedFontMetrics *fontMetrics);
+    template<typename T = qreal>
+    static void paintRichText(QPainter *painter, T x, T y, T w, T h, T xinc,
+                              const List &richText, CachedFontMetrics<T> *fontMetrics);
     static void htmlRichText(const List &richText, QString &textHtml, QString &textPlain);
 
     static List fromTextDocument(const QTextDocument &doc);

src/widgets/DisassemblerGraphView.cpp

@@ -377,8 +377,7 @@ void DisassemblerGraphView::initFont()
     charWidth = metrics.width('X');
     charHeight = static_cast<int>(metrics.height());
     charOffset = 0;
-    delete mFontMetrics;
-    mFontMetrics = new CachedFontMetrics(this, font());
+    mFontMetrics.reset(new CachedFontMetrics<qreal>(font()));
 }
 
 void DisassemblerGraphView::drawBlock(QPainter &p, GraphView::GraphBlock &block)
@@ -464,7 +463,7 @@ void DisassemblerGraphView::drawBlock(QPainter &p, GraphView::GraphBlock &block)
     // Highlight selected tokens
     if (highlight_token != nullptr) {
         int y = static_cast<int>(blockY + (2 * charWidth) + (db.header_text.lines.size() * charHeight));
-        int tokenWidth = mFontMetrics->width(highlight_token->content);
+        qreal tokenWidth = mFontMetrics->width(highlight_token->content);
 
         for (const Instr &instr : db.instrs) {
             int pos = -1;
@@ -477,19 +476,19 @@ void DisassemblerGraphView::drawBlock(QPainter &p, GraphView::GraphBlock &block)
                     continue;
                 }
 
-                int widthBefore = mFontMetrics->width(instr.plainText.left(pos));
+                qreal widthBefore = mFontMetrics->width(instr.plainText.left(pos));
                 if (charWidth * 3 + widthBefore > block.width - (10 + 2 * charWidth)) {
                     continue;
                 }
 
-                int highlightWidth = tokenWidth;
+                qreal highlightWidth = tokenWidth;
                 if (charWidth * 3 + widthBefore + tokenWidth >= block.width - (10 + 2 * charWidth)) {
-                    highlightWidth = static_cast<int>(block.width - widthBefore - (10 + 4 * charWidth));
+                    highlightWidth = block.width - widthBefore - (10 + 4 * charWidth);
                 }
 
                 QColor selectionColor = ConfigColor("wordhl");
 
-                p.fillRect(QRect(static_cast<int>(blockX + charWidth * 3 + widthBefore), y, highlightWidth,
+                p.fillRect(QRectF(blockX + charWidth * 3 + widthBefore, y, highlightWidth,
                                  charHeight), selectionColor);
             }
 
@@ -535,8 +534,8 @@ void DisassemblerGraphView::drawBlock(QPainter &p, GraphView::GraphBlock &block)
             continue;
         }
 
-        RichTextPainter::paintRichText(&p, static_cast<int>(x), y, block.width, charHeight, 0, line,
-                                       mFontMetrics);
+        RichTextPainter::paintRichText<qreal>(&p, x, y, block.width, charHeight, 0, line,
+                                       mFontMetrics.get());
         y += charHeight;
     }
 
@@ -569,9 +568,9 @@ void DisassemblerGraphView::drawBlock(QPainter &p, GraphView::GraphBlock &block)
             QRectF bpRect(x - rectSize / 3.0, y + (charHeight - rectSize) / 2.0, rectSize, rectSize);
             Q_UNUSED(bpRect);
 
-            RichTextPainter::paintRichText(&p, static_cast<int>(x + charWidth), y,
-                                           static_cast<int>(block.width - charWidth), charHeight, 0, line,
-                                           mFontMetrics);
+            RichTextPainter::paintRichText<qreal>(&p, x + charWidth, y,
+                                           block.width - charWidth, charHeight, 0, line,
+                                           mFontMetrics.get());
             y += charHeight;
 
         }

src/widgets/DisassemblerGraphView.h

@@ -141,7 +141,7 @@ private:
 
     Token *highlight_token;
     // Font data
-    CachedFontMetrics *mFontMetrics;
+    std::unique_ptr<CachedFontMetrics<qreal>> mFontMetrics;
     qreal charWidth;
     int charHeight;
     int charOffset;