crop.cpp File Reference

#include <qimage.h>
#include <qstring.h>
#include "crop.h"

Include dependency graph for crop.cpp:

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Functions
QImage *	cropImage (QString filename, QPoint topLeft, QPoint bottomRight)

Function Documentation

cropImage()

QImage* cropImage	(	QString	filename,
		QPoint	topLeft,
		QPoint	bottomRight
	)

Definition at line 36 of file crop.cpp.

{
  //load original image
  QImage origImage( filename );
  
  //convert to 32-bit depth if necessary
  if( origImage.depth() < 32 ) { origImage = origImage.convertDepth( 32, Qt::AutoColor ); }
  
  //construct cropped image
  QImage* croppedImage = new QImage(bottomRight.x() - topLeft.x() + 1, 
                                    bottomRight.y() - topLeft.y() + 1,
                                    origImage.depth());  
  
  //iterate over each selected scanline 
  int xOrig, yOrig;
  int xCropped, yCropped;
  uchar *origScanLine, *croppedScanLine;
  
  for( yOrig=topLeft.y(),yCropped=0;    yOrig<=bottomRight.y();     yOrig++, yCropped++)
  {   
    //iterate over each selected pixel in scanline
    origScanLine    = origImage.scanLine(yOrig);
    croppedScanLine = croppedImage->scanLine(yCropped);
    
    for( xOrig=topLeft.x(),xCropped=0; xOrig<=bottomRight.x(); xOrig++,xCropped++)
    {
      //copy pixel color from original image to cropped image
      *((QRgb*)croppedScanLine+xCropped) = *((QRgb*)origScanLine+xOrig);      
    }
  }
  
  //return pointer to cropped image
  return croppedImage;  
}

References bottomRight, and topLeft.

Referenced by EditingInterface::crop().