void QgsSVGFillSymbolLayer::startRender( QgsSymbolV2RenderContext& context )
{
if ( mSvgViewBox.isNull() )
{
return;
}
delete mSvgPattern;
mSvgPattern = 0;
double size = context.outputPixelSize( mPatternWidth );
//don't render pattern if symbol size is below one or above 10,000 pixels
if (( int )size < 1.0 || 10000.0 < size )
{
mSvgPattern = new QImage();
mBrush.setTextureImage( *mSvgPattern );
}
else
{
bool fitsInCache = true;
const QImage& patternImage = QgsSvgCache::instance()->svgAsImage( mSvgFilePath, size, mSvgFillColor, mSvgOutlineColor, mSvgOutlineWidth,
context.renderContext().scaleFactor(), context.renderContext().rasterScaleFactor(), fitsInCache );
if ( !fitsInCache )
{
const QPicture& patternPict = QgsSvgCache::instance()->svgAsPicture( mSvgFilePath, size, mSvgFillColor, mSvgOutlineColor, mSvgOutlineWidth,
context.renderContext().scaleFactor(), 1.0 );
double hwRatio = 1.0;
if ( patternPict.width() > 0 )
{
hwRatio = ( double )patternPict.height() / ( double )patternPict.width();
}
mSvgPattern = new QImage(( int )size, ( int )( size * hwRatio ), QImage::Format_ARGB32_Premultiplied );
mSvgPattern->fill( 0 ); // transparent background
QPainter p( mSvgPattern );
p.drawPicture( QPointF( size / 2, size * hwRatio / 2 ), patternPict );
}
QTransform brushTransform;
brushTransform.scale( 1.0 / context.renderContext().rasterScaleFactor(), 1.0 / context.renderContext().rasterScaleFactor() );
if ( !doubleNear( context.alpha(), 1.0 ) )
{
QImage transparentImage = fitsInCache ? patternImage.copy() : mSvgPattern->copy();
QgsSymbolLayerV2Utils::multiplyImageOpacity( &transparentImage, context.alpha() );
mBrush.setTextureImage( transparentImage );
}
else
{
mBrush.setTextureImage( fitsInCache ? patternImage : *mSvgPattern );
}
mBrush.setTransform( brushTransform );
}
if ( mOutline )
{
mOutline->startRender( context.renderContext() );
}
}
void QgsSimpleMarkerSymbolLayerV2::prepareCache( QgsSymbolV2RenderContext& context )
{
double scaledSize = context.outputPixelSize( mSize );
// calculate necessary image size for the cache
double pw = (( mPen.widthF() == 0 ? 1 : mPen.widthF() ) + 1 ) / 2 * 2; // make even (round up); handle cosmetic pen
int imageSize = (( int ) scaledSize + pw ) / 2 * 2 + 1; // make image width, height odd; account for pen width
double center = (( double ) imageSize / 2 ) + 0.5; // add 1/2 pixel for proper rounding when the figure's coordinates are added
mCache = QImage( QSize( imageSize, imageSize ), QImage::Format_ARGB32_Premultiplied );
mCache.fill( 0 );
QPainter p;
p.begin( &mCache );
p.setRenderHint( QPainter::Antialiasing );
p.setBrush( mBrush );
p.setPen( mPen );
p.translate( QPointF( center, center ) );
drawMarker( &p, context );
p.end();
// Construct the selected version of the Cache
QColor selColor = context.selectionColor();
mSelCache = QImage( QSize( imageSize, imageSize ), QImage::Format_ARGB32_Premultiplied );
mSelCache.fill( 0 );
p.begin( &mSelCache );
p.setRenderHint( QPainter::Antialiasing );
p.setBrush( mSelBrush );
p.setPen( mSelPen );
p.translate( QPointF( center, center ) );
drawMarker( &p, context );
p.end();
// Check that the selected version is different. If not, then re-render,
// filling the background with the selection color and using the normal
// colors for the symbol .. could be ugly!
if ( mSelCache == mCache )
{
p.begin( &mSelCache );
p.setRenderHint( QPainter::Antialiasing );
p.fillRect( 0, 0, imageSize, imageSize, selColor );
p.setBrush( mBrush );
p.setPen( mPen );
p.translate( QPointF( center, center ) );
drawMarker( &p, context );
p.end();
}
}
void QgsLinePatternFillSymbolLayer::startRender( QgsSymbolV2RenderContext& context )
{
double outlinePixelWidth = context.outputPixelSize( mLineWidth );
double outputPixelDist = context.outputPixelSize( mDistance );
double outputPixelOffset = context.outputPixelSize( mOffset );
//create image
int height, width;
if ( doubleNear( mLineAngle, 0 ) || doubleNear( mLineAngle, 360 ) || doubleNear( mLineAngle, 90 ) || doubleNear( mLineAngle, 180 ) || doubleNear( mLineAngle, 270 ) )
{
height = outputPixelDist;
width = height; //width can be set to arbitrary value
}
else
{
height = qAbs( outputPixelDist / cos( mLineAngle * M_PI / 180 ) ); //keep perpendicular distance between lines constant
width = qAbs( height / tan( mLineAngle * M_PI / 180 ) );
}
//depending on the angle, we might need to render into a larger image and use a subset of it
int dx = 0;
int dy = 0;
QImage patternImage( width, height, QImage::Format_ARGB32 );
patternImage.fill( 0 );
QPainter p( &patternImage );
p.setRenderHint( QPainter::Antialiasing, true );
QPen pen( mColor );
pen.setWidthF( outlinePixelWidth );
pen.setCapStyle( Qt::FlatCap );
p.setPen( pen );
QPoint p1, p2, p3, p4, p5, p6;
if ( doubleNear( mLineAngle, 0.0 ) || doubleNear( mLineAngle, 360.0 ) || doubleNear( mLineAngle, 180.0 ) )
{
p1 = QPoint( 0, height );
p2 = QPoint( width, height );
p3 = QPoint( 0, 0 );
p4 = QPoint( width, 0 );
p5 = QPoint( 0, 2 * height );
p6 = QPoint( width, 2 * height );
}
else if ( doubleNear( mLineAngle, 90.0 ) || doubleNear( mLineAngle, 270.0 ) )
{
p1 = QPoint( 0, height );
p2 = QPoint( 0, 0 );
p3 = QPoint( width, height );
p4 = QPoint( width, 0 );
p5 = QPoint( -width, height );
p6 = QPoint( -width, 0 );
}
else if (( mLineAngle > 0 && mLineAngle < 90 ) || ( mLineAngle > 180 && mLineAngle < 270 ) )
{
dx = outputPixelDist * cos(( 90 - mLineAngle ) * M_PI / 180.0 );
dy = outputPixelDist * sin(( 90 - mLineAngle ) * M_PI / 180.0 );
p1 = QPoint( 0, height );
p2 = QPoint( width, 0 );
p3 = QPoint( -dx, height - dy );
p4 = QPoint( width - dx, -dy ); //p4 = QPoint( p3.x() + width, p3.y() - height );
p5 = QPoint( dx, height + dy );
p6 = QPoint( width + dx, dy ); //p6 = QPoint( p5.x() + width, p5.y() - height );
}
else if (( mLineAngle < 180 ) || ( mLineAngle > 270 && mLineAngle < 360 ) )
{
dy = outputPixelDist * cos(( 180 - mLineAngle ) * M_PI / 180 );
dx = outputPixelDist * sin(( 180 - mLineAngle ) * M_PI / 180 );
p1 = QPoint( width, height );
p2 = QPoint( 0, 0 );
p5 = QPoint( width + dx, height - dy );
p6 = QPoint( p5.x() - width, p5.y() - height ); //p6 = QPoint( dx, -dy );
p3 = QPoint( width - dx, height + dy );
p4 = QPoint( p3.x() - width, p3.y() - height ); //p4 = QPoint( -dx, dy );
}
if ( !doubleNear( mOffset, 0.0 ) ) //shift everything
{
QPointF tempPt;
tempPt = QgsSymbolLayerV2Utils::pointOnLineWithDistance( p1, p3, outputPixelDist + outputPixelOffset );
p3 = QPoint( tempPt.x(), tempPt.y() );
tempPt = QgsSymbolLayerV2Utils::pointOnLineWithDistance( p2, p4, outputPixelDist + outputPixelOffset );
p4 = QPoint( tempPt.x(), tempPt.y() );
tempPt = QgsSymbolLayerV2Utils::pointOnLineWithDistance( p1, p5, outputPixelDist - outputPixelOffset );
p5 = QPoint( tempPt.x(), tempPt.y() );
tempPt = QgsSymbolLayerV2Utils::pointOnLineWithDistance( p2, p6, outputPixelDist - outputPixelOffset );
p6 = QPoint( tempPt.x(), tempPt.y() );
//update p1, p2 last
tempPt = QgsSymbolLayerV2Utils::pointOnLineWithDistance( p1, p3, outputPixelOffset ).toPoint();
p1 = QPoint( tempPt.x(), tempPt.y() );
tempPt = QgsSymbolLayerV2Utils::pointOnLineWithDistance( p2, p4, outputPixelOffset ).toPoint();
p2 = QPoint( tempPt.x(), tempPt.y() );;
}
p.drawLine( p1, p2 );
p.drawLine( p3, p4 );
p.drawLine( p5, p6 );
p.end();
//set image to mBrush
if ( !doubleNear( context.alpha(), 1.0 ) )
{
QImage transparentImage = patternImage.copy();
QgsSymbolLayerV2Utils::multiplyImageOpacity( &transparentImage, context.alpha() );
mBrush.setTextureImage( transparentImage );
}
else
{
mBrush.setTextureImage( patternImage );
}
QTransform brushTransform;
brushTransform.scale( 1.0 / context.renderContext().rasterScaleFactor(), 1.0 / context.renderContext().rasterScaleFactor() );
mBrush.setTransform( brushTransform );
if ( mOutline )
{
mOutline->startRender( context.renderContext() );
}
}
void QgsPointPatternFillSymbolLayer::startRender( QgsSymbolV2RenderContext& context )
{
//render 3 rows and columns in one go to easily incorporate displacement
double width = context.outputPixelSize( mDistanceX ) * 2.0;
double height = context.outputPixelSize( mDistanceY ) * 2.0;
QImage patternImage( width, height, QImage::Format_ARGB32 );
patternImage.fill( 0 );
if ( mMarkerSymbol )
{
QPainter p( &patternImage );
//marker rendering needs context for drawing on patternImage
QgsRenderContext pointRenderContext;
pointRenderContext.setPainter( &p );
pointRenderContext.setRasterScaleFactor( 1.0 );
pointRenderContext.setScaleFactor( context.renderContext().scaleFactor() * context.renderContext().rasterScaleFactor() );
QgsMapToPixel mtp( context.renderContext().mapToPixel().mapUnitsPerPixel() / context.renderContext().rasterScaleFactor() );
pointRenderContext.setMapToPixel( mtp );
pointRenderContext.setForceVectorOutput( false );
mMarkerSymbol->setOutputUnit( context.outputUnit() );
mMarkerSymbol->startRender( pointRenderContext );
//render corner points
mMarkerSymbol->renderPoint( QPointF( 0, 0 ), context.feature(), pointRenderContext );
mMarkerSymbol->renderPoint( QPointF( width, 0 ), context.feature(), pointRenderContext );
mMarkerSymbol->renderPoint( QPointF( 0, height ), context.feature(), pointRenderContext );
mMarkerSymbol->renderPoint( QPointF( width, height ), context.feature(), pointRenderContext );
//render displaced points
double displacementPixelX = context.outputPixelSize( mDisplacementX );
double displacementPixelY = context.outputPixelSize( mDisplacementY );
mMarkerSymbol->renderPoint( QPointF( width / 2.0, -displacementPixelY ), context.feature(), pointRenderContext );
mMarkerSymbol->renderPoint( QPointF( displacementPixelX, height / 2.0 ), context.feature(), pointRenderContext );
mMarkerSymbol->renderPoint( QPointF( width / 2.0 + displacementPixelX, height / 2.0 - displacementPixelY ), context.feature(), pointRenderContext );
mMarkerSymbol->renderPoint( QPointF( width + displacementPixelX, height / 2.0 ), context.feature(), pointRenderContext );
mMarkerSymbol->renderPoint( QPointF( width / 2.0, height - displacementPixelY ), context.feature(), pointRenderContext );
mMarkerSymbol->stopRender( pointRenderContext );
}
if ( !doubleNear( context.alpha(), 1.0 ) )
{
QImage transparentImage = patternImage.copy();
QgsSymbolLayerV2Utils::multiplyImageOpacity( &transparentImage, context.alpha() );
mBrush.setTextureImage( transparentImage );
}
else
{
mBrush.setTextureImage( patternImage );
}
QTransform brushTransform;
brushTransform.scale( 1.0 / context.renderContext().rasterScaleFactor(), 1.0 / context.renderContext().rasterScaleFactor() );
mBrush.setTransform( brushTransform );
if ( mOutline )
{
mOutline->startRender( context.renderContext() );
}
}
