text: /****************************************************************************
  **
  ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
  ** All rights reserved.
  ** Contact: Nokia Corporation (qt-info@nokia.com)
  **
  ** This file is part of the QtGui module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** GNU Lesser General Public License Usage
  ** This file may be used under the terms of the GNU Lesser General Public
  ** License version 2.1 as published by the Free Software Foundation and
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  ** file. Please review the following information to ensure the GNU Lesser
  ** General Public License version 2.1 requirements will be met:
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  ** rights. These rights are described in the Nokia Qt LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU General
  ** Public License version 3.0 as published by the Free Software Foundation
  ** and appearing in the file LICENSE.GPL included in the packaging of this
  ** file. Please review the following information to ensure the GNU General
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  ** http://www.gnu.org/copyleft/gpl.html.
  **
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  ** Alternatively, this file may be used in accordance with the terms and
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  **
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  **
  ****************************************************************************/
  
  #ifndef QPAINTENGINE_X11_P_H
  #define QPAINTENGINE_X11_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include "QtGui/qpaintengine.h"
  #include "QtGui/qregion.h"
  #include "QtGui/qpen.h"
  #include "QtCore/qpoint.h"
  #include "private/qpaintengine_p.h"
  #include "private/qpainter_p.h"
  #include "private/qpolygonclipper_p.h"
  
  typedef unsigned long Picture;
  
  QT_BEGIN_NAMESPACE
  
  class QX11PaintEnginePrivate;
  class QFontEngineFT;
  class QXRenderTessellator;
  
  struct qt_float_point
  {
      qreal x, y;
  };
  
  class QX11PaintEngine : public QPaintEngine
  {
      Q_DECLARE_PRIVATE(QX11PaintEngine)
  public:
      QX11PaintEngine();
      ~QX11PaintEngine();
  
      bool begin(QPaintDevice *pdev);
      bool end();
  
      void updateState(const QPaintEngineState &state);
  
      void updatePen(const QPen &pen);
      void updateBrush(const QBrush &brush, const QPointF &pt);
      void updateRenderHints(QPainter::RenderHints hints);
      void updateFont(const QFont &font);
      void updateMatrix(const QTransform &matrix);
      void updateClipRegion_dev(const QRegion &region, Qt::ClipOperation op);
  
      void drawLines(const QLine *lines, int lineCount);
      void drawLines(const QLineF *lines, int lineCount);
  
      void drawRects(const QRect *rects, int rectCount);
      void drawRects(const QRectF *rects, int rectCount);
  
      void drawPoints(const QPoint *points, int pointCount);
      void drawPoints(const QPointF *points, int pointCount);
  
      void drawEllipse(const QRect &r);
      void drawEllipse(const QRectF &r);
  
      virtual void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);
      inline void drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode)
          { QPaintEngine::drawPolygon(points, pointCount, mode); }
  
      void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);
      void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s);
      void drawPath(const QPainterPath &path);
      void drawTextItem(const QPointF &p, const QTextItem &textItem);
      void drawImage(const QRectF &r, const QImage &img, const QRectF &sr,
                     Qt::ImageConversionFlags flags = Qt::AutoColor);
  
      virtual Qt::HANDLE handle() const;
      inline Type type() const { return QPaintEngine::X11; }
  
      QPainter::RenderHints supportedRenderHints() const;
  
  protected:
      QX11PaintEngine(QX11PaintEnginePrivate &dptr);
  
      void drawXLFD(const QPointF &p, const QTextItemInt &si);
  #ifndef QT_NO_FONTCONFIG
      void drawFreetype(const QPointF &p, const QTextItemInt &si);
  #endif
  
      friend class QPixmap;
      friend class QFontEngineBox;
      friend Q_GUI_EXPORT GC qt_x11_get_pen_gc(QPainter *);
      friend Q_GUI_EXPORT GC qt_x11_get_brush_gc(QPainter *);
  
  private:
      Q_DISABLE_COPY(QX11PaintEngine)
  };
  
  class QX11PaintEnginePrivate : public QPaintEnginePrivate
  {
      Q_DECLARE_PUBLIC(QX11PaintEngine)
  public:
      QX11PaintEnginePrivate()
      {
          scrn = -1;
          hd = 0;
          picture = 0;
          gc = gc_brush = 0;
          dpy  = 0;
          xinfo = 0;
          txop = QTransform::TxNone;
          has_clipping = false;
          render_hints = 0;
          xform_scale = 1;
  #ifndef QT_NO_XRENDER
          tessellator = 0;
  #endif
      }
      enum GCMode {
          PenGC,
          BrushGC
      };
  
      void init();
      void fillPolygon_translated(const QPointF *points, int pointCount, GCMode gcMode,
                                  QPaintEngine::PolygonDrawMode mode);
      void fillPolygon_dev(const QPointF *points, int pointCount, GCMode gcMode,
                           QPaintEngine::PolygonDrawMode mode);
      void fillPath(const QPainterPath &path, GCMode gcmode, bool transform);
      void strokePolygon_dev(const QPointF *points, int pointCount, bool close);
      void strokePolygon_translated(const QPointF *points, int pointCount, bool close);
      void setupAdaptedOrigin(const QPoint &p);
      void resetAdaptedOrigin();
      void decidePathFallback() {
          use_path_fallback = has_alpha_brush
                              || has_alpha_pen
                              || has_custom_pen
                              || has_complex_xform
                              || (render_hints & QPainter::Antialiasing);
      }
      void decideCoordAdjust() {
          adjust_coords = !(render_hints & QPainter::Antialiasing)
                          && (has_alpha_pen
                              || (has_alpha_brush && has_pen && !has_alpha_pen)
                              || (cpen.style() > Qt::SolidLine));
      }
      void clipPolygon_dev(const QPolygonF &poly, QPolygonF *clipped_poly);
      void systemStateChanged();
  
      Display *dpy;
      int scrn;
      int pdev_depth;
      Qt::HANDLE hd;
      QPixmap brush_pm;
  #if !defined (QT_NO_XRENDER)
      Qt::HANDLE picture;
      Qt::HANDLE current_brush;
      QPixmap bitmap_texture;
      int composition_mode;
  #else
      Qt::HANDLE picture;
  #endif
      GC gc;
      GC gc_brush;
  
      QPen cpen;
      QBrush cbrush;
      QRegion crgn;
      QTransform matrix;
      qreal opacity;
  
      uint has_complex_xform : 1;
      uint has_scaling_xform : 1;
      uint has_non_scaling_xform : 1;
      uint has_custom_pen : 1;
      uint use_path_fallback : 1;
      uint adjust_coords : 1;
      uint has_clipping : 1;
      uint adapted_brush_origin : 1;
      uint adapted_pen_origin : 1;
      uint has_pen : 1;
      uint has_brush : 1;
      uint has_texture : 1;
      uint has_alpha_texture : 1;
      uint has_pattern : 1;
      uint has_alpha_pen : 1;
      uint has_alpha_brush : 1;
      uint render_hints;
  
      const QX11Info *xinfo;
      QPointF bg_origin;
      QTransform::TransformationType txop;
      qreal xform_scale;
      QPolygonClipper<qt_float_point, qt_float_point, float> polygonClipper;
  
      int xlibMaxLinePoints;
  #ifndef QT_NO_XRENDER
      QXRenderTessellator *tessellator;
  #endif
  };
  
  QT_END_NAMESPACE
  
  #endif // QPAINTENGINE_X11_P_H
  