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41
42 #include "qpaintdevice.h"
43 #include "qpainter.h"
44 #include "qwidget.h"
45 #include "qbitmap.h"
46 #include "qapplication.h"
47 #include "qprinter.h"
48 #include <qdebug.h>
49 #include <private/qt_mac_p.h>
50 #include <private/qprintengine_mac_p.h>
51 #include <private/qpixmap_mac_p.h>
52 #include <private/qpixmap_raster_p.h>
53
54 QT_BEGIN_NAMESPACE
55
56 /*****************************************************************************
57 Internal variables and functions
58 *****************************************************************************/
59
60 /*! \internal */
qt_mac_defaultDpi_x()61 float qt_mac_defaultDpi_x()
62 {
63 // Mac OS X currently assumes things to be 72 dpi.
64 // (see http://developer.apple.com/releasenotes/GraphicsImaging/RN-ResolutionIndependentUI/)
65 // This may need to be re-worked as we go further in the resolution-independence stuff.
66 return 72;
67 }
68
69 /*! \internal */
qt_mac_defaultDpi_y()70 float qt_mac_defaultDpi_y()
71 {
72 // Mac OS X currently assumes things to be 72 dpi.
73 // (see http://developer.apple.com/releasenotes/GraphicsImaging/RN-ResolutionIndependentUI/)
74 // This may need to be re-worked as we go further in the resolution-independence stuff.
75 return 72;
76 }
77
78
79 /*! \internal
80
81 Returns the QuickDraw CGrafPtr of the paint device. 0 is returned
82 if it can't be obtained. Do not hold the pointer around for long
83 as it can be relocated.
84
85 \warning This function is only available on Mac OS X.
86 */
87
qt_mac_qd_context(const QPaintDevice * device)88 Q_GUI_EXPORT GrafPtr qt_mac_qd_context(const QPaintDevice *device)
89 {
90 if (device->devType() == QInternal::Pixmap) {
91 return static_cast<GrafPtr>(static_cast<const QPixmap *>(device)->macQDHandle());
92 } else if(device->devType() == QInternal::Widget) {
93 return static_cast<GrafPtr>(static_cast<const QWidget *>(device)->macQDHandle());
94 } else if(device->devType() == QInternal::Printer) {
95 QPaintEngine *engine = static_cast<const QPrinter *>(device)->paintEngine();
96 return static_cast<GrafPtr>(static_cast<const QMacPrintEngine *>(engine)->handle());
97 }
98 return 0;
99 }
100
101 extern CGColorSpaceRef qt_mac_colorSpaceForDeviceType(const QPaintDevice *pdev);
102
103 /*! \internal
104
105 Returns the CoreGraphics CGContextRef of the paint device. 0 is
106 returned if it can't be obtained. It is the caller's responsiblity to
107 CGContextRelease the context when finished using it.
108
109 \warning This function is only available on Mac OS X.
110 */
111
qt_mac_cg_context(const QPaintDevice * pdev)112 Q_GUI_EXPORT CGContextRef qt_mac_cg_context(const QPaintDevice *pdev)
113 {
114 if (pdev->devType() == QInternal::Pixmap) {
115 const QPixmap *pm = static_cast<const QPixmap*>(pdev);
116 CGColorSpaceRef colorspace = qt_mac_colorSpaceForDeviceType(pdev);
117 uint flags = kCGImageAlphaPremultipliedFirst;
118 #ifdef kCGBitmapByteOrder32Host //only needed because CGImage.h added symbols in the minor version
119 flags |= kCGBitmapByteOrder32Host;
120 #endif
121 CGContextRef ret = 0;
122
123 // It would make sense to put this into a mac #ifdef'ed
124 // virtual function in the QPixmapData at some point
125 if (pm->data->classId() == QPixmapData::MacClass) {
126 const QMacPixmapData *pmData = static_cast<const QMacPixmapData*>(pm->data.data());
127 ret = CGBitmapContextCreate(pmData->pixels, pmData->w, pmData->h,
128 8, pmData->bytesPerRow, colorspace,
129 flags);
130 if(!ret)
131 qWarning("QPaintDevice: Unable to create context for pixmap (%d/%d/%d)",
132 pmData->w, pmData->h, (pmData->bytesPerRow * pmData->h));
133 } else if (pm->data->classId() == QPixmapData::RasterClass) {
134 QImage *image = pm->data->buffer();
135 ret = CGBitmapContextCreate(image->bits(), image->width(), image->height(),
136 8, image->bytesPerLine(), colorspace, flags);
137 }
138
139 CGContextTranslateCTM(ret, 0, pm->height());
140 CGContextScaleCTM(ret, 1, -1);
141 return ret;
142 } else if (pdev->devType() == QInternal::Widget) {
143 CGContextRef ret = static_cast<CGContextRef>(static_cast<const QWidget *>(pdev)->macCGHandle());
144 CGContextRetain(ret);
145 return ret;
146 } else if (pdev->devType() == QInternal::MacQuartz) {
147 return static_cast<const QMacQuartzPaintDevice *>(pdev)->cgContext();
148 }
149 return 0;
150 }
151
152 QT_END_NAMESPACE
153