path: root/tdegtk/tqtcairopainter.cpp

/****************************************************************************
**
** Implementation of TQt3CairoPaintDevice class
**
** Copyright (C) 2012 Timothy Pearson.  All rights reserved.
**
** This file is part of the TDE Qt4 style interface
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#include "tqtcairopainter.h"

#define TQT_NO_COMPAT_NAMES
#include "tqpainter.h"
#include "tqpixmap.h"
#include "tqbitmap.h"
#include "tqimage.h"
#include "tqfile.h"
#include "tqpaintdevicemetrics.h"
#undef Qt

/*!
    \class TQt3CairoPaintDevice tdeqt4painter.h
    \brief The TQt3CairoPaintDevice class is a paint device that translates
    Qt paint events to a TQt painter.

    \ingroup graphics
    \ingroup shared

*/

/*!
    Constructs TQt3CairoPaintDevice on an existing QPainter
*/

TQt3CairoPaintDevice::TQt3CairoPaintDevice( cairo_surface_t *cairosurface )
    : TQPaintDevice( TQInternal::Picture | TQInternal::ExternalDevice )
{
	m_surface = cairosurface;
	m_painter = cairo_create(m_surface);
}

/*!
    Destroys the TQt3CairoPaintDevice.
*/
TQt3CairoPaintDevice::~TQt3CairoPaintDevice()
{
	cairo_destroy(m_painter);
}

/*!
  \internal
  Implementation of the function forwarded above to the internal data struct.
*/

bool TQt3CairoPaintDevice::cmd( int c, TQPainter *pt, TQPDevCmdParam *p )
{
	Q_UNUSED(pt);

	unsigned int i;
	int x;
	int y;

	int index;
	int count;
	int lineCount;

	switch ( c ) {				// exec cmd
	    case PdcNOP:
		break;
#if 0
	    case PdcDrawPoint:
		m_qt4painter->drawPoint( qt4point1 );
		break;
	    case PdcMoveTo:
		curPt = qt4point1;
		break;
	    case PdcLineTo:
		prevPt = curPt;
		curPt = qt4point1;
		m_qt4painter->drawLine( prevPt, curPt );
		break;
	    case PdcDrawLine:
		m_qt4painter->drawLine( qt4point1, qt4point2 );
		break;
	    case PdcDrawRect:
		m_qt4painter->drawRect( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter) );
		break;
	    case PdcDrawRoundRect:
		m_qt4painter->drawRoundedRect( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
		break;
	    case PdcDrawEllipse:
		m_qt4painter->drawEllipse( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter) );
		break;
	    case PdcDrawArc:
		m_qt4painter->drawArc( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
		break;
	    case PdcDrawPie:
		m_qt4painter->drawPie( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
		break;
	    case PdcDrawChord:
		m_qt4painter->drawChord( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
		break;
	    case PdcDrawLineSegments:
		index = 0;
		count = -1;
		lineCount = (count == -1) ? (qt4polygon.size() - index) / 2  : count;
		m_qt4painter->drawLines(qt4polygon.constData() + index * 2, lineCount);
		break;
	    case PdcDrawPolyline:
		m_qt4painter->drawPolyline( qt4polygon );
		break;
	    case PdcDrawPolygon:
		m_qt4painter->drawPolygon( qt4polygon, (p[1].ival == 0)?Qt::OddEvenFill:Qt::WindingFill );
		break;
	    case PdcDrawCubicBezier:
		index = 0;
		path.moveTo(qt4polygon.at(index));
		path.cubicTo(qt4polygon.at(index+1), qt4polygon.at(index+2), qt4polygon.at(index+3));
		m_qt4painter->strokePath(path, m_qt4painter->pen());
		break;
	    case PdcDrawText:
		m_qt4painter->drawText( qt4point1, qt4string );
		break;
	    case PdcDrawTextFormatted:
		m_qt4painter->drawText( qt4rect, qt4formattedtextflags, qt4string );
		break;
	    case PdcDrawText2:
		m_qt4painter->drawText( qt4point1, qt4string );
		break;
	    case PdcDrawText2Formatted:
		m_qt4painter->drawText( qt4rect, qt4formattedtextflags, qt4string );
		break;
	    case PdcDrawPixmap:
		m_qt4painter->drawPixmap( qt4rect, qt4pixmap );
		break;
#if 0
	    case PdcDrawImage: {
		TQImage image;
		if ( d->formatMajor < 4 ) {
		    s >> p >> image;
		    painter->drawImage( p, image );
		} else {
		    s >> r >> image;
		    painter->drawImage( r, image );
		}
		}
		break;
#endif
	    case PdcBegin:
		if (m_qt4painter->isActive()) {
			// KEEP THIS DEACTIVATED
// 			QPaintDevice* pd = m_qt4painter->device();
// 			m_qt4painter->end();
// 			m_qt4painter->begin(pd);
		}
#if defined(QT_CHECK_RANGE)
		else {
			tqWarning( "TQt3CairoPaintDevice::cmd: Painter has no paint device available" );
		}
#endif
		break;
	    case PdcEnd:
		// KEEP THIS DEACTIVATED
// 		m_qt4painter->end();
		break;
	    case PdcSave:
		m_qt4painter->save();
		break;
	    case PdcRestore:
		m_qt4painter->restore();
		break;
	    case PdcSetBkColor:
		m_qt4painter->setBackground( QBrush(QColor(p[0].color->red(), p[0].color->green(), p[0].color->blue())) );
		break;
	    case PdcSetBkMode:
		m_qt4painter->setBackgroundMode( qt4bkmode );
		break;
	    case PdcSetROP:
		m_qt4painter->setCompositionMode(qt4compositionmode);
		break;
	    case PdcSetBrushOrigin:
		m_qt4painter->setBrushOrigin( qt4point1 );
		break;
	    case PdcSetFont:
		m_qt4painter->setFont( qt4font );
		break;
	    case PdcSetPen:
		m_qt4painter->setPen( qt4pen );
		break;
	    case PdcSetBrush:
		m_qt4painter->setBrush( qt4brush );
		break;
#if 0
	    case PdcSetTabStops:
		s >> i_16;
		painter->setTabStops( i_16 );
		break;
	    case PdcSetTabArray:
		s >> i_16;
		if ( i_16 == 0 ) {
		    painter->setTabArray( 0 );
		} else {
		    int *ta = new int[i_16];
		    TQ_CHECK_PTR( ta );
		    for ( int i=0; i<i_16; i++ ) {
			s >> i1_16;
			ta[i] = i1_16;
		    }
		    painter->setTabArray( ta );
		    delete [] ta;
		}
		break;
	    case PdcSetVXform:
		s >> i_8;
#ifndef QT_NO_TRANSFORMATIONS
		painter->setViewXForm( i_8 );
#endif
		break;
	    case PdcSetWindow:
		s >> r;
#ifndef QT_NO_TRANSFORMATIONS
		painter->setWindow( r );
#endif
		break;
	    case PdcSetViewport:
		s >> r;
#ifndef QT_NO_TRANSFORMATIONS
		painter->setViewport( r );
#endif
		break;
#endif
	    case PdcSetWXform:
		m_qt4painter->setWorldMatrixEnabled( p[0].ival );
		break;
	    case PdcSetWMatrix:
		m_qt4painter->setWorldMatrix( qt4matrix, p[1].ival );
		break;
#if 0
#ifndef QT_NO_TRANSFORMATIONS
	    case PdcSaveWMatrix:
		painter->saveWorldMatrix();
		break;
	    case PdcRestoreWMatrix:
		painter->restoreWorldMatrix();
		break;
#endif
#endif
	    case PdcSetClip:
		m_qt4painter->setClipping( p[0].ival );
		break;
	    case PdcSetClipRegion:
		m_qt4painter->setClipRegion( qt4region, Qt::ReplaceClip );
		break;
#endif
	    default:
#if defined(QT_CHECK_RANGE)
		tqWarning( "TQt3CairoPaintDevice::cmd: Invalid command %d", c );
#endif
	}

	return TRUE;
}


/*!
    Internal implementation of the virtual TQPaintDevice::metric()
    function.

    Use the TQPaintDeviceMetrics class instead.

    A picture has the following hard-coded values: dpi=72,
    numcolors=16777216 and depth=24.

    \a m is the metric to get.
*/

int TQt3CairoPaintDevice::metric( int m ) const
{
	int val;

	if (m_surface) {
		double x_pixels_per_inch;
		double y_pixels_per_inch;
		cairo_format_t format;
		switch ( m ) {
			// ### hard coded dpi and color depth values !
			case TQPaintDeviceMetrics::PdmWidth:
				val = cairo_image_surface_get_width(m_surface);
				break;
			case TQPaintDeviceMetrics::PdmHeight:
				val = cairo_image_surface_get_height(m_surface);
				break;
			case TQPaintDeviceMetrics::PdmWidthMM:
				cairo_surface_get_fallback_resolution(m_surface, &x_pixels_per_inch, &y_pixels_per_inch);
				val = ((cairo_image_surface_get_width(m_surface)/x_pixels_per_inch)*25.4);
				break;
			case TQPaintDeviceMetrics::PdmHeightMM:
				cairo_surface_get_fallback_resolution(m_surface, &x_pixels_per_inch, &y_pixels_per_inch);
				val = ((cairo_image_surface_get_height(m_surface)/y_pixels_per_inch)*25.4);
				break;
			case TQPaintDeviceMetrics::PdmDpiX:
				cairo_surface_get_fallback_resolution(m_surface, &x_pixels_per_inch, &y_pixels_per_inch);
				val = x_pixels_per_inch;
				break;
			case TQPaintDeviceMetrics::PdmPhysicalDpiX:
				cairo_surface_get_fallback_resolution(m_surface, &x_pixels_per_inch, &y_pixels_per_inch);
				val = x_pixels_per_inch;
				break;
			case TQPaintDeviceMetrics::PdmDpiY:
				cairo_surface_get_fallback_resolution(m_surface, &x_pixels_per_inch, &y_pixels_per_inch);
				val = y_pixels_per_inch;
				break;
			case TQPaintDeviceMetrics::PdmPhysicalDpiY:
				cairo_surface_get_fallback_resolution(m_surface, &x_pixels_per_inch, &y_pixels_per_inch);
				val = y_pixels_per_inch;
				break;
			case TQPaintDeviceMetrics::PdmNumColors:
				format = cairo_image_surface_get_format(m_surface);
				if (format == CAIRO_FORMAT_ARGB32) {
					val = INT_MAX;
				}
				else if (format == CAIRO_FORMAT_RGB24) {
					val = 16777216;
				}
				else {
					val = 16777216;
				}
				break;
			case TQPaintDeviceMetrics::PdmDepth:
				format = cairo_image_surface_get_format(m_surface);
				if (format == CAIRO_FORMAT_ARGB32) {
					val = 32;
				}
				else if (format == CAIRO_FORMAT_RGB24) {
					val = 24;
				}
				else {
					val = 24;
				}
				break;
			default:
				val = 0;
#if defined(QT_CHECK_RANGE)
				tqWarning( "TQt3CairoPaintDevice::metric: Invalid metric command" );
#endif
		}
	}
	else {
		val = 0;
#if defined(QT_CHECK_RANGE)
		tqWarning( "TQt3CairoPaintDevice::metric: No Cairo surface available" );
#endif
	}
	return val;
}