void PTRecolorAction::DoIt()
{
if ( mTable )
{
SUOffscreen *currentBuffer = mSettings.currentBuffer;
mSettings.thePaintView->CopyToUndo();
mSettings.thePaintView->SelectNone();
/*
create a new buffer the same size as the image but with
a depth of 8-bits. use the specified color table as the
color table.
*/
SInt32 width = currentBuffer->GetWidth();
SInt32 height = currentBuffer->GetHeight();
SUOffscreen *newBuffer = SUOffscreen::CreateBuffer( width, height, kRecolorDepth, mTable );
/*
increase the inverse table size from 4 to 5 bits.
this gives substantially better color matching.
*/
newBuffer->IncreaseInverseTableSize();
/*
Copy the image to the 8-bit buffer to downsample the colors
and then back to the original 32-bit one
*/
newBuffer->CopyFrom( currentBuffer );
currentBuffer->CopyFrom( newBuffer );
delete newBuffer;
// update the canvas
mSettings.theCanvas->DrawFrom( currentBuffer );
}
this->PostAsAction();
}
