Port QMacPrintEngine and QCoreGraphicsPaintEngine from Qt 4 to Qt 5

Copy qprintengine_mac_p.h, qprintengine_mac.mm, qpaintengine_mac_p.h,
and qpaintengine_mac.cpp (as qpaintengine_mac.mm) from src/gui/painting/
in the 4.8 branch of http://git.gitorious.org/qt/qt.git at commit
e6bd33d4aef0e4538d7918e7ab130624c911b553.

The following changes are necessary to port these files to the Qt 5 API:

- The copyright notice on these files has been updated to match the
  header.LGPL template.

- Fix #includes for qprintengine_mac* and qpaintengine_mac*, as some
  headers have moved in Qt 5.

- Remove extern forward declarations for functions that no longer exist.

- Remove friend declarations for classes/functions that are not part of
  the Cocoa platform plugin.

- Remove QT_MAC_USE_COCOA blocks. Qt is always using Cocoa now, there
  is no need to keep the non-Cocoa code paths anymore. The
  QMacPrintEngine::shouldSuppressStatus() method was also removed,
  since it is no longer used.

- Do not use Qt::UniteClip, it was removed in commit
  01b72952c38b9193138eabdab6bdab632cd75ebd

- Use QCocoaAutoReleasePool in qprintengine_mac.mm

- Use QPlatformPrintSupport::convert*() functions in QMacPrintEngine,
  since we cannot use non-exported functions from QtPrintSupport in the
  Cocoa plugin.

- Use qt_mac_image_to_cg_image() to convert QPixmap to CGImageRef. First
  convert QPixmap to QImage (cheap, since the Cocoa platform plugin
  uses QRasterPlatformPixmap), and then convert the QImage to CFImageRef
  using the existing helper function.

- Copy qt_mac_cg_context() to the Cocoa platform plugin from
  qmacstyle_mac.mm, adding a note at each location about the
  duplication.

- Add qt_mac_QRegionToHIMutableShape() helper. Adapt the Qt 4.x code for
  QRegion::toHIMutableShape(), and use this in QCoreGraphicsPaintEngine.

- Add qt_mac_drawCGImage() and qt_mac_get_scalefactor() helper. These
  functions are copied directly from the 4.8 branch of
  http://git.gitorious.org/qt/qt.git at the same revision shown above.

- Add qt_mac_create_imagemask() helper in qpaintengine_mac.cpp.  This
  helper is based on the function with the same name from the 4.8
  branch of http://git.gitorious.org/qt/qt.git at the same revision
  shown above. The correctness of the implementation has not yet been
  verified.

Since these files use the QPrinter API from QtPrintSupport, the Cocoa
plugin now needs to link to that library as well.

Change-Id: I90b9bbe201327489ef9e1b3294e68e91ddda27bd
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

1 files changed, 254 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qpaintengine_mac_p.h b/src/plugins/platforms/cocoa/qpaintengine_mac_p.h
new file mode 100644
index 0000000000..0987d921fc
--- /dev/null
+++ b/src/plugins/platforms/cocoa/qpaintengine_mac_p.h
@@ -0,0 +1,254 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins 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
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** 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
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QPAINTENGINE_MAC_P_H
+#define QPAINTENGINE_MAC_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 "private/qpaintengine_p.h"
+#include "private/qpolygonclipper_p.h"
+#include "private/qfont_p.h"
+#include "QtCore/qhash.h"
+
+#include "qt_mac_p.h"
+
+typedef struct CGColorSpace *CGColorSpaceRef;
+QT_BEGIN_NAMESPACE
+
+class QCoreGraphicsPaintEnginePrivate;
+class QCoreGraphicsPaintEngine : public QPaintEngine
+{
+    Q_DECLARE_PRIVATE(QCoreGraphicsPaintEngine)
+
+public:
+    QCoreGraphicsPaintEngine();
+    ~QCoreGraphicsPaintEngine();
+
+    bool begin(QPaintDevice *pdev);
+    bool end();
+    static CGColorSpaceRef macGenericColorSpace();
+    static CGColorSpaceRef macDisplayColorSpace(const QWidget *widget = 0);
+
+    void updateState(const QPaintEngineState &state);
+
+    void updatePen(const QPen &pen);
+    void updateBrush(const QBrush &brush, const QPointF &pt);
+    void updateFont(const QFont &font);
+    void updateOpacity(qreal opacity);
+    void updateMatrix(const QTransform &matrix);
+    void updateTransform(const QTransform &matrix);
+    void updateClipRegion(const QRegion &region, Qt::ClipOperation op);
+    void updateClipPath(const QPainterPath &path, Qt::ClipOperation op);
+    void updateCompositionMode(QPainter::CompositionMode mode);
+    void updateRenderHints(QPainter::RenderHints hints);
+
+    void drawLines(const QLineF *lines, int lineCount);
+    void drawRects(const QRectF *rects, int rectCount);
+    void drawPoints(const QPointF *p, int pointCount);
+    void drawEllipse(const QRectF &r);
+    void drawPath(const QPainterPath &path);
+
+    void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);
+    void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);
+    void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s);
+
+    void drawTextItem(const QPointF &pos, const QTextItem &item);
+    void drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,
+                   Qt::ImageConversionFlags flags = Qt::AutoColor);
+
+    Type type() const { return QPaintEngine::CoreGraphics; }
+
+    CGContextRef handle() const;
+
+    static void initialize();
+    static void cleanup();
+
+    QPainter::RenderHints supportedRenderHints() const;
+
+    //avoid partial shadowed overload warnings...
+    void drawLines(const QLine *lines, int lineCount) { QPaintEngine::drawLines(lines, lineCount); }
+    void drawRects(const QRect *rects, int rectCount) { QPaintEngine::drawRects(rects, rectCount); }
+    void drawPoints(const QPoint *p, int pointCount) { QPaintEngine::drawPoints(p, pointCount); }
+    void drawEllipse(const QRect &r) { QPaintEngine::drawEllipse(r); }
+    void drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode)
+    { QPaintEngine::drawPolygon(points, pointCount, mode); }
+
+    bool supportsTransformations(qreal, const QTransform &) const { return true; };
+
+protected:
+    friend class QMacPrintEngine;
+    friend class QMacPrintEnginePrivate;
+    QCoreGraphicsPaintEngine(QPaintEnginePrivate &dptr);
+
+private:
+    static bool m_postRoutineRegistered;
+    static CGColorSpaceRef m_genericColorSpace;
+    static QHash<CGDirectDisplayID, CGColorSpaceRef> m_displayColorSpaceHash;
+    static void cleanUpMacColorSpaces();
+    Q_DISABLE_COPY(QCoreGraphicsPaintEngine)
+};
+
+/*****************************************************************************
+  Private data
+ *****************************************************************************/
+class QCoreGraphicsPaintEnginePrivate : public QPaintEnginePrivate
+{
+    Q_DECLARE_PUBLIC(QCoreGraphicsPaintEngine)
+public:
+    QCoreGraphicsPaintEnginePrivate()
+        : hd(0), shading(0), stackCount(0), complexXForm(false), disabledSmoothFonts(false)
+    {
+    }
+
+    struct {
+        QPen pen;
+        QBrush brush;
+        uint clipEnabled : 1;
+        QRegion clip;
+        QTransform transform;
+   } current;
+
+    //state info (shared with QD)
+    CGAffineTransform orig_xform;
+
+    //cg structures
+    CGContextRef hd;
+    CGShadingRef shading;
+    int stackCount;
+    bool complexXForm;
+    bool disabledSmoothFonts;
+    enum { CosmeticNone, CosmeticTransformPath, CosmeticSetPenWidth } cosmeticPen;
+
+    // pixel and cosmetic pen size in user coordinates.
+    QPointF pixelSize;
+    float cosmeticPenSize;
+
+    //internal functions
+    enum { CGStroke=0x01, CGEOFill=0x02, CGFill=0x04 };
+    void drawPath(uchar ops, CGMutablePathRef path = 0);
+    void setClip(const QRegion *rgn=0);
+    void resetClip();
+    void setFillBrush(const QPointF &origin=QPoint());
+    void setStrokePen(const QPen &pen);
+    inline void saveGraphicsState();
+    inline void restoreGraphicsState();
+    float penOffset();
+    QPointF devicePixelSize(CGContextRef context);
+    float adjustPenWidth(float penWidth);
+    inline void setTransform(const QTransform *matrix=0)
+    {
+        CGContextConcatCTM(hd, CGAffineTransformInvert(CGContextGetCTM(hd)));
+        CGAffineTransform xform = orig_xform;
+        if (matrix) {
+            extern CGAffineTransform qt_mac_convert_transform_to_cg(const QTransform &);
+            xform = CGAffineTransformConcat(qt_mac_convert_transform_to_cg(*matrix), xform);
+        }
+        CGContextConcatCTM(hd, xform);
+        CGContextSetTextMatrix(hd, xform);
+    }
+};
+
+inline void QCoreGraphicsPaintEnginePrivate::saveGraphicsState()
+{
+    ++stackCount;
+    CGContextSaveGState(hd);
+}
+
+inline void QCoreGraphicsPaintEnginePrivate::restoreGraphicsState()
+{
+    --stackCount;
+    Q_ASSERT(stackCount >= 0);
+    CGContextRestoreGState(hd);
+}
+
+class QMacQuartzPaintDevice : public QPaintDevice
+{
+public:
+    QMacQuartzPaintDevice(CGContextRef cg, int width, int height, int bytesPerLine)
+        : mCG(cg), mWidth(width), mHeight(height), mBytesPerLine(bytesPerLine)
+    { }
+    int devType() const { return QInternal::MacQuartz; }
+    CGContextRef cgContext() const { return mCG; }
+    int metric(PaintDeviceMetric metric) const {
+        switch (metric) {
+        case PdmWidth:
+            return mWidth;
+        case PdmHeight:
+            return mHeight;
+        case PdmWidthMM:
+            return (qt_defaultDpiX() * mWidth) / 2.54;
+        case PdmHeightMM:
+            return (qt_defaultDpiY() * mHeight) / 2.54;
+        case PdmNumColors:
+            return 0;
+        case PdmDepth:
+            return 32;
+        case PdmDpiX:
+        case PdmPhysicalDpiX:
+            return qt_defaultDpiX();
+        case PdmDpiY:
+        case PdmPhysicalDpiY:
+            return qt_defaultDpiY();
+        }
+        return 0;
+    }
+    QPaintEngine *paintEngine() const { qWarning("This function should never be called."); return 0; }
+private:
+    CGContextRef mCG;
+    int mWidth;
+    int mHeight;
+    int mBytesPerLine;
+};
+
+QT_END_NAMESPACE
+
+#endif // QPAINTENGINE_MAC_P_H