Read a bitmap into matrix

md2012

Hello dear programmers,
Well i have a bitmap i have to do a rotation with mathematical methodes to rotate the image.
well as i searched ,there is a QBitmap class specially designed for working with bitmap but i couldn't find any special event to convert my QBitmap to QMatrix or int arrays.
take a look at this example :

//Open the source and create the destination bitmap 
Graphics::TBitmap *SrcBitmap=new Graphics::TBitmap; 
Graphics::TBitmap *DestBitmap=new Graphics::TBitmap; 
SrcBitmap->LoadFromFile("YourBitmap.bmp");
 
//rotate by 90° 

DestBitmap->Width=SrcBitmap->Height; 
DestBitmap->Height=SrcBitmap->Width; 

//Rotate one pixel at a time 
for (int x=0;x<SrcBitmap->Width;x++) 
{ 
  for(int y=0;y<SrcBitmap->Height;y++) 
  { 
    DestBitmap->Canvas->Pixels[y][SrcBitmap->Width-1-x]= 
       SrcBitmap->Canvas->Pixels[x][y]; 
  } 
} 

//Assign the Destination bitmap to a TImage 
Image1->Picture->Bitmap=DestBitmap; 
delete DestBitmap; 
delete SrcBitmap;

i want to do something like that in Qt.
i think im not in the right path ,any idea what to do ?

VRonin

QMatrix is obsolete, you can use QTransform with QPixmap::transformed() to do matrix transformations on the image.

QPixmap image("YourBitmap.bmp"); //I'm using QPixmap as I'm quite sure you don't want a monochrome bitmap but you can change it
QTransform transformation;
transformation.rotate(90.0);
QPixmap rotadedImage= image.transformed(transformation);

md2012

@VRonin
well thnQ sir for your help.
another Question.
i found the example above in the google ,looks like a C++ code.
any idea what library it uses ?

Graphics::TBitmap

VRonin

Looks like borland specific library