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Pedro Alves
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 Posted: Tue Nov 23, 2004 2:31 pm Post subject: Using scanline to fill an array [][] |
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Hi,
I'm trying to use scanline with a bitmap picture in order to fill and
array[][] of the size of the picture with all its information (pixel
data).
For that I:
void __fastcall TForm1::Button1Click(TObject *Sender)
{
<<< setting up calculations and files to receive those
calculations
bitmap1 = new Graphics::TBitmap();
bitmap1->LoadFromFile(FileListBox1->FileName);
Image1->Canvas->Draw(0,0,bitmap1);
bitmap1->PixelFormat = pf8bit;
m = bitmap1->Height; //rows y m j
n = bitmap1->Width; //cols x n k
float **data; // Original image pixels
try {
data = new float*[m];
for (int j = 0; j < m; j++)
data[j] = new float[n];
}
catch(...) {
ShowMessage("Could not allocate for data[][]. Bye for now!");
exit(-1);
};
With this array data, I use scanline and two for cycles (the usual) to
go through each element and keep it in data[m][n]
What happens is that I can do this with a 256x256 pixels picture but
not with a 100x100 or a rectangle picture.
I think I'm getting very confused and I might have some other errors
on my code.
Is there and easier way to:
1) create a array the size of the picture (using the operator new
making it width and height independent)?
2) Use scanline to go through the picture and save it the array?
I'm a newbie on this.
Thanks for the help.
Pedro
[email]alves_pmf (AT) yahoo (DOT) com.br[/email]
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