-void DaliTableView::CreateShapeImage( ShapeType shapeType, const Size& size, BufferImage& distanceFieldOut )
-{
- // this bitmap will hold the alpha map for the distance field shader
- distanceFieldOut = BufferImage::New( size.width, size.height, Pixel::A8 );
-
- // Generate bit pattern
- std::vector< unsigned char > imageDataA8;
- imageDataA8.reserve( size.width * size.height ); // A8
-
- switch( shapeType )
- {
- case CIRCLE:
- GenerateCircle( size, imageDataA8 );
- break;
- case BUBBLE:
- GenerateCircle( size, imageDataA8, true );
- break;
- default:
- break;
- }
-
- PixelBuffer* buffer = distanceFieldOut.GetBuffer();
- if( buffer )
- {
- GenerateDistanceFieldMap( &imageDataA8[ 0 ], size, buffer, size, 8.0f, size );
- distanceFieldOut.Update();
- }
-}
-
-void DaliTableView::GenerateCircle( const Size& size, std::vector< unsigned char >& distanceFieldOut, bool hollow )
-{
- const float radius = size.width * 0.5f * size.width * 0.5f;
- Vector2 center( size.width / 2, size.height / 2 );
-
- for( int h = 0; h < size.height; ++h )
- {
- for( int w = 0; w < size.width; ++w )
- {
- Vector2 pos( w, h );
- Vector2 dist = pos - center;
-
- float distance = ( dist.x * dist.x ) + ( dist.y * dist.y );
-
- // If hollow, check the distance against a min & max value, otherwise just use the max value.
- unsigned char fillByte = ( hollow ? ( ( distance <= radius ) && ( distance > ( radius * 0.7f ) ) ) : ( distance <= radius ) ) ? 0xFF : 0x00;
-
- distanceFieldOut.push_back( fillByte );
- }
- }
-}
-