// Process a source image file
prImg proc( prImg org )
{
if( _opts.mipCount != 0 ) {
if (org.mips == null)
org.mips = new List<Image>();
for( int mipLevel = 1, // a modest for loop
f = (int)Math.Pow(2,mipLevel),
w = org.mips[0].Width / f,
h = org.mips[0].Height / f;
w != 0 && h != 0;
mipLevel++,
f = (int) Math.Pow(2, mipLevel),
w = org.mips[0].Width / f,
h = org.mips[0].Height / f ) {
Bitmap mipImg = new Bitmap( w, h );
Graphics gtemp = Graphics.FromImage( mipImg );
gtemp.InterpolationMode = _opts.mode;
gtemp.DrawImage( org.mips[0], new Rectangle( 0, 0, w, h ) );
gtemp.Dispose();
org.mips.Add( mipImg );
}
}
if( Processed != null )
Processed( this, new ImageEventArgs( org.id, org.file ));
return org;
}
// Generate empty mipmaps for the image
void prepMips( prImg img )
{
for (int mipLevel = 1, // mega for-loop
f = (int) Math.Pow( 2, mipLevel ),
w = img.mips[0].Width / f,
h = img.mips[0].Height / f;
w != 0 && h != 0;
mipLevel++,
f = (int) Math.Pow( 2, mipLevel ),
w = img.mips[0].Width / f,
h = img.mips[0].Height / f) {
Bitmap mipImg = new Bitmap( w, h );
img.mips.Add( mipImg );
}
}
// Add a processed image file to the atlas
prImg merge( prImg acc, prImg inst )
{
int mip = 0;
//inst.mips.Select(bmp => { return copyMip(mip++, inst, acc); });
foreach (Image bmp in inst.mips) { copyMip(mip++, inst, acc); }
if( Packed != null )
Packed( this, new ImageEventArgs( inst.id, inst.file ) );
return acc;
}
// Prepare the atlas
prImg prep( string file )
{
var img = new Bitmap( Math.Min(_count, _opts.magnitude.Width) * _texSize.Width,
(1 + (_count / _opts.magnitude.Width)) * _texSize.Height );
var pimg = new prImg( file, img, -1 );
prepMips( pimg );
return pimg;
}
// Copy a specific mip-level from the source image to the atlas
Image copyMip( int mipLevel, prImg src, prImg dest )
{
Graphics g = Graphics.FromImage( dest.mips[ mipLevel ] );
int w = src.mips[ mipLevel ].Width, h = src.mips[ mipLevel ].Height;
g.InterpolationMode = _opts.mode;
g.DrawImage( src.mips[ mipLevel ], (src.id % _opts.magnitude.Width) * w, (src.id / _opts.magnitude.Width) * h );
g.Dispose();
return src.mips[ mipLevel ];
}
