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#include "qpaintdevice.h"

#include "qpainter.h"

#include "qwidget.h"

#include "qbitmap.h"

#include "qapplication.h"

#include "qprinter.h"

#include <qdebug.h>

#include <private/qt_mac_p.h>

#include <private/qprintengine_mac_p.h>

#include <private/qpixmap_mac_p.h>

#include <private/qpixmap_raster_p.h>

QT_BEGIN_NAMESPACE

/*****************************************************************************

  Internal variables and functions

 *****************************************************************************/

/*! \internal */

float qt_mac_defaultDpi_x()

{

    // Mac OS X currently assumes things to be 72 dpi.

    // (see http://developer.apple.com/releasenotes/GraphicsImaging/RN-ResolutionIndependentUI/)

    // This may need to be re-worked as we go further in the resolution-independence stuff.

    return 72;

}

/*! \internal */

float qt_mac_defaultDpi_y()

{

    // Mac OS X currently assumes things to be 72 dpi.

    // (see http://developer.apple.com/releasenotes/GraphicsImaging/RN-ResolutionIndependentUI/)

    // This may need to be re-worked as we go further in the resolution-independence stuff.

    return 72;

}

/*! \internal

    Returns the QuickDraw CGrafPtr of the paint device. 0 is returned

    if it can't be obtained. Do not hold the pointer around for long

    as it can be relocated.

    \warning This function is only available on Mac OS X.

*/

Q_GUI_EXPORT GrafPtr qt_mac_qd_context(const QPaintDevice *device)

{

    if (device->devType() == QInternal::Pixmap) {

        return static_cast<GrafPtr>(static_cast<const QPixmap *>(device)->macQDHandle());

    } else if(device->devType() == QInternal::Widget) {

        return static_cast<GrafPtr>(static_cast<const QWidget *>(device)->macQDHandle());

    } else if(device->devType() == QInternal::Printer) {

        QPaintEngine *engine = static_cast<const QPrinter *>(device)->paintEngine();

        return static_cast<GrafPtr>(static_cast<const QMacPrintEngine *>(engine)->handle());

    }

    return 0;

}

extern CGColorSpaceRef qt_mac_colorSpaceForDeviceType(const QPaintDevice *pdev);

/*! \internal

    Returns the CoreGraphics CGContextRef of the paint device. 0 is

    returned if it can't be obtained. It is the caller's responsiblity to

    CGContextRelease the context when finished using it.

    \warning This function is only available on Mac OS X.

*/

Q_GUI_EXPORT CGContextRef qt_mac_cg_context(const QPaintDevice *pdev)

{

    if (pdev->devType() == QInternal::Pixmap) {

        const QPixmap *pm = static_cast<const QPixmap*>(pdev);

        CGColorSpaceRef colorspace = qt_mac_colorSpaceForDeviceType(pdev);

        uint flags = kCGImageAlphaPremultipliedFirst;

#ifdef kCGBitmapByteOrder32Host //only needed because CGImage.h added symbols in the minor version

        flags |= kCGBitmapByteOrder32Host;

#endif

        CGContextRef ret = 0;

        // It would make sense to put this into a mac #ifdef'ed

        // virtual function in the QPixmapData at some point

        if (pm->data->classId() == QPixmapData::MacClass) {

            const QMacPixmapData *pmData = static_cast<const QMacPixmapData*>(pm->data.data());

            ret = CGBitmapContextCreate(pmData->pixels, pmData->w, pmData->h,

                                                     8, pmData->bytesPerRow, colorspace,

                                                     flags);

            if(!ret)

                qWarning("QPaintDevice: Unable to create context for pixmap (%d/%d/%d)",

                         pmData->w, pmData->h, (pmData->bytesPerRow * pmData->h));

        } else if (pm->data->classId() == QPixmapData::RasterClass) {

            QImage *image = pm->data->buffer();

            ret = CGBitmapContextCreate(image->bits(), image->width(), image->height(),

                                        8, image->bytesPerLine(), colorspace, flags);

        }

        CGContextTranslateCTM(ret, 0, pm->height());

        CGContextScaleCTM(ret, 1, -1);

        return ret;

    } else if (pdev->devType() == QInternal::Widget) {

        CGContextRef ret = static_cast<CGContextRef>(static_cast<const QWidget *>(pdev)->macCGHandle());

        CGContextRetain(ret);

        return ret;

    } else if (pdev->devType() == QInternal::MacQuartz) {

        return static_cast<const QMacQuartzPaintDevice *>(pdev)->cgContext();

    }

    return 0;

}

QT_END_NAMESPACE