A red RGB image

[magick_user]

Hi all,
i'm attempting to create from scratch a red image.
Here the code:

Code: Select all

                        unsigned int width = 2550;
                        unsigned int height= 3300;
                        int bitCount = 24;
                        unsigned int m_bytesPerRow = ((width* bitCount + 31) / 32) * 4;								
			BYTE* data = new BYTE[height* m_bytesPerRow ];
			memset(data,0,sizeof(unsigned char));
			for(unsigned int i=0;i<=this-> height-1;i++)
			{
				for(unsigned int j=0;j<= m_bytesPerRow -1;j=j+9)
				{
					data[i*m_bytesPerRow+j]=255;
					data[i*m_bytesPerRow+j+1]=0;
					data[i*m_bytesPerRow+j+2]=0;

					data[i*m_bytesPerRow+j+3]=255;
					data[i*m_bytesPerRow+j+4]=0;
					data[i*m_bytesPerRow+j+5]=0;

					data[i*m_bytesPerRow+j+6]=255;
					data[i*m_bytesPerRow+j+7]=0;
					data[i*m_bytesPerRow+j+8]=0;


				}
			}
			::Magick::Image *img = new Magick::Image();
			
			img->resize(Geometrywidth,height));
			img->depth(this->m_bitmapInfoHeader->biBitCount);			
			img->modifyImage();
			img->read(width,height,"RGB",MagickCore::CharPixel,data);
			img->syncPixels();
			img->write("c:/a_red_image.bmp");

but the result is not that expected: the image has only the first line red, the other blue end the last green(for each triplet lines).
There is also a black diagonal line.
Why??
What i'm wrong?