| 316 | } |
| 317 | |
| 318 | double key_bg(double Kfg) |
| 319 | { |
| 320 | if ( ( (_center + _toleranceLower) <= 0. ) && (Kfg <= 0.) ) { // special case: everything below 0 is 1. if center-toleranceLower<=0 |
| 321 | return 1.; |
| 322 | } else if ( Kfg < (_center + _toleranceLower + _softnessLower) ) { |
| 323 | return 0.; |
| 324 | } else if ( ( Kfg < (_center + _toleranceLower) ) && (_softnessLower < 0.) ) { |
| 325 | return ( Kfg - (_center + _toleranceLower + _softnessLower) ) / -_softnessLower; |
| 326 | } else if (Kfg <= _center + _toleranceUpper) { |
| 327 | return 1.; |
| 328 | } else if ( ( 1. <= (_center + _toleranceUpper) ) && (1. <= Kfg) ) { // special case: everything above 1 is 1. if center+toleranceUpper>=1 |
| 329 | return 1.; |
| 330 | } else if ( ( Kfg < (_center + _toleranceUpper + _softnessUpper) ) && (_softnessUpper > 0.) ) { |
| 331 | return ( (_center + _toleranceUpper + _softnessUpper) - Kfg ) / _softnessUpper; |
| 332 | } else { |
| 333 | return 0.; |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | protected: |
| 338 | double rgb2luminance(double r, |
nothing calls this directly
no outgoing calls
no test coverage detected