38 if ( !p || !mIterator || !viewPort || !theQgsMapToPixel )
60 &block, topLeftCol, topLeftRow ) )
73 if ( printer && printer->
outputFormat() == QPrinter::PdfFormat )
78 QRgb transparentBlack = qRgba( 0, 0, 0, 0 );
79 QRgb transparentWhite = qRgba( 255, 255, 255, 0 );
80 for (
int x = 0; x < img.
width(); x++ )
82 for (
int y = 0; y < img.
height(); y++ )
84 if ( img.
pixel( x, y ) == transparentBlack )
86 img.
setPixel( x, y, transparentWhite );
92 drawImage( p, viewPort, img, topLeftCol, topLeftRow, theQgsMapToPixel );
100 if ( !p || !viewPort )
115 if ( theQgsMapToPixel )
117 int w = theQgsMapToPixel->
mapWidth();
143 double nw = br.
width() * 0.5;
double nh = br.
height() * 0.5;
int mapWidth() const
Return current map width in pixels The information is only known if setRotation was used...
Iterator for sequentially processing raster cells.
void setRenderHint(RenderHint hint, bool on)
void startRasterRead(int bandNumber, int nCols, int nRows, const QgsRectangle &extent)
Start reading of raster band.
void setPixel(int x, int y, uint index_or_rgb)
int mWidth
Width, number of columns to be rendered.
void drawLine(const QLineF &line)
double mapRotation() const
Return current map rotation in degrees.
double x() const
Get the x value of the point.
void drawImage(QPainter *p, QgsRasterViewPort *viewPort, const QImage &img, int topLeftCol, int topLeftRow, const QgsMapToPixel *mapToPixel=0) const
Draws raster part.
double ANALYSIS_EXPORT max(double x, double y)
Returns the maximum of two doubles or the first argument if both are equal.
void draw(QPainter *p, QgsRasterViewPort *viewPort, const QgsMapToPixel *theQgsMapToPixel)
Perform transforms between map coordinates and device coordinates.
QRgb pixel(int x, int y) const
void drawRoundedRect(const QRectF &rect, qreal xRadius, qreal yRadius, Qt::SizeMode mode)
QPaintDevice * device() const
QgsRasterDrawer(QgsRasterIterator *iterator)
void setBrush(const QBrush &brush)
bool readNextRasterPart(int bandNumber, int &nCols, int &nRows, QgsRasterBlock **block, int &topLeftCol, int &topLeftRow)
Fetches next part of raster data, caller takes ownership of the block and caller should delete the bl...
void drawImage(const QRectF &target, const QImage &image, const QRectF &source, QFlags< Qt::ImageConversionFlag > flags)
int mHeight
Distance in map units from bottom edge to top edge for the part of the raster that is to be rendered...
void translate(const QPointF &offset)
int mapHeight() const
Return current map height in pixels.
double y() const
Get the y value of the point.
QImage image() const
Get image if type is color.
QgsPoint mTopLeftPoint
Coordinate (in output device coordinate system) of top left corner of the part of the raster that is ...
This class provides details of the viewable area that a raster will be rendered into.
QgsRectangle mDrawnExtent
Intersection of current map extent and layer extent.