qt5base-lts/tests/auto/gui/painting/qpainter/utils/createImages/main.cpp

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#include <qapplication.h>
#include <qpixmap.h>
#include <qpainter.h>
#include <qbitmap.h>

static QColor baseColor( int k, int intensity )
{
    int r = ( k & 1 ) * intensity;
    int g = ( (k>>1) & 1 ) * intensity;
    int b = ( (k>>2) & 1 ) * intensity;
    return QColor( r, g, b );
}

static QPixmap createDestPixmap()
{
    const int colorbands = 3;
    const int intensities = 4;
    QPixmap pm( 32, colorbands*intensities*4 );
    QPainter painter;
    painter.begin( &pm );
    for ( int i=0; i<colorbands; i++ ) {
	for ( int j=0; j<intensities; j++ ) {
	    int intensity = 255 * (j+1) / intensities; // 25%, 50%, 75% and 100%
	    for ( int k=0; k<8; k++ ) {
		QColor col = baseColor( k, intensity );
		painter.setPen( QPen( col, 1 ) );
		painter.setBrush( col );
		painter.drawRect( k*4, j*4 + i*intensities*4, 4, 4 );
	    }
	}
    }
    painter.end();
    return pm;
}

static QBitmap createDestBitmap()
{
    // create a bitmap that looks like:
    // (0 is color0 and 1 is color1)
    //  00001111
    //  00001111
    //  00001111
    //  00001111
    //  00001111
    //  00001111
    //  00001111
    //  00001111
    QBitmap bm( 8, 8 );
    QPainter painter;
    painter.begin( &bm );
    painter.setPen( QPen( Qt::color0, 4 ) );
    painter.drawLine( 2, 0, 2, 8 );
    painter.setPen( QPen( Qt::color1, 4 ) );
    painter.drawLine( 6, 0, 6, 8 );
    painter.end();
    return bm;
}

static QBitmap createSrcBitmap( int size, int border )
{
    // create the source bitmap that looks like
    // (for size=4 and border=2):
    //
    //
    //    1111
    //    1111
    //    0000
    //    0000
    //
    //
    // If \a border is 0, the bitmap does not have a mask, otherwise the inner
    // part is masked.
    // \a size specifies the size of the inner (i.e. masked) part. It should be
    // a multiple of 2.
    int size2 = size/2;
    int totalSize = 2 * ( size2 + border );
    QBitmap bm( totalSize, totalSize );
    QPainter painter;
    painter.begin( &bm );
    painter.setPen( QPen( Qt::color0, 1 ) );
    painter.setBrush( Qt::color0 );
    painter.drawRect( border, size2+border, size, size2 );
    painter.setPen( QPen( Qt::color1, 1 ) );
    painter.setBrush( Qt::color1 );
    painter.drawRect( border, border, size, size2 );
    painter.end();
    if ( border > 0 ) {
	QBitmap mask( totalSize, totalSize, true );
	QPainter painter;
	painter.begin( &mask );
	painter.setPen( QPen( Qt::color1, 1 ) );
	painter.setBrush( Qt::color1 );
	painter.drawRect( border, border, size, size );
	painter.end();
	bm.setMask( mask );
    }
    return bm;
}


int main( int argc, char **argv )
{
    QApplication a( argc, argv );

    // input for tst_QPainter::drawLine_rop_bitmap()
    {
	QBitmap dst = createDestBitmap();
	dst.save( "../../drawLine_rop_bitmap/dst.xbm", "XBM" );
    }

    // input for tst_QPainter::drawPixmap_rop_bitmap()
    {
	QBitmap dst = createDestBitmap();
	QBitmap src1 = createSrcBitmap( 4, 2 );
	QBitmap src2 = createSrcBitmap( 4, 0 );
	dst.save( "../../drawPixmap_rop_bitmap/dst.xbm", "XBM" );
	src1.save( "../../drawPixmap_rop_bitmap/src1.xbm", "XBM" );
	src1.mask()->save( "../../drawPixmap_rop_bitmap/src1-mask.xbm", "XBM" );
	src2.save( "../../drawPixmap_rop_bitmap/src2.xbm", "XBM" );
    }

    // input for tst_QPainter::drawPixmap_rop()
    {
	QPixmap dst1 = createDestPixmap();
	QPixmap dst2 = createDestPixmap();
	dst2.resize( 32, 32 );
	QBitmap src1 = createSrcBitmap( 32, 0 );

	QBitmap src_tmp = createSrcBitmap( 32, 0 ).xForm( QWMatrix( 1, 0, 0, -1, 0, 0 ) );
	src_tmp.resize( 32, 48 );
	QBitmap src2 = src_tmp.xForm( QWMatrix( 1, 0, 0, -1, 0, 0 ) );
	QBitmap mask( 32, 48, true );
	{
	    QPainter painter;
	    painter.begin( &mask );
	    painter.setPen( QPen( Qt::color1, 1 ) );
	    painter.setBrush( Qt::color1 );
	    painter.drawRect( 0, 16, 32, 32 );
	    painter.end();
	}
	src2.setMask( mask );

	QBitmap src3 = createSrcBitmap( 32, 0 ).xForm( QWMatrix( 1, 0, 0, -1, 0, 0 ) );

	dst1.save( "../../drawPixmap_rop/dst1.png", "PNG" );
	dst2.save( "../../drawPixmap_rop/dst2.png", "PNG" );
	src1.save( "../../drawPixmap_rop/src1.xbm", "XBM" );
	src2.save( "../../drawPixmap_rop/src2.xbm", "XBM" );
	src2.mask()->save( "../../drawPixmap_rop/src2-mask.xbm", "XBM" );
	src3.save( "../../drawPixmap_rop/src3.xbm", "XBM" );
    }
}