dali/public-api/animation/alpha-function.cpp

   1 /*
   2  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include <dali/public-api/animation/alpha-function.h>
  20
  21 // INTERNAL INCLUDES
  22
  23 namespace Dali
  24 {
  25
  26 namespace
  27 {
  28 constexpr unsigned int BitMaskOfN( unsigned int bits )
  29 {
  30   return ( 1 << bits ) - 1;
  31 }
  32 } // unnamed namespace
  33
  34 AlphaFunction::AlphaFunction()
  35 :mBezierControlPoints(Vector4::ZERO),
  36  mCustom(0),
  37  mBuiltin(DEFAULT),
  38  mMode(BUILTIN_FUNCTION)
  39 {}
  40
  41 AlphaFunction::AlphaFunction( BuiltinFunction function)
  42 :mBezierControlPoints(Vector4::ZERO),
  43  mCustom(0),
  44  mBuiltin(function),
  45  mMode(BUILTIN_FUNCTION)
  46 {}
  47
  48 AlphaFunction::AlphaFunction( AlphaFunctionPrototype function)
  49 :mBezierControlPoints(Vector4::ZERO),
  50  mCustom(function),
  51  mBuiltin(DEFAULT),
  52  mMode(CUSTOM_FUNCTION)
  53 {}
  54
  55 AlphaFunction::AlphaFunction( const Vector2& controlPoint0, const Vector2& controlPoint1 )
  56 :mBezierControlPoints(Vector4(Clamp(controlPoint0.x,0.0f,1.0f),controlPoint0.y,
  57                               Clamp(controlPoint1.x,0.0f,1.0f),controlPoint1.y)),
  58  mCustom(0),
  59  mBuiltin(DEFAULT),
  60  mMode(BEZIER)
  61 {
  62 }
  63
  64 Vector4 AlphaFunction::GetBezierControlPoints() const
  65 {
  66   return mBezierControlPoints;
  67 }
  68
  69 AlphaFunctionPrototype AlphaFunction::GetCustomFunction() const
  70 {
  71   return mCustom;
  72 }
  73
  74 AlphaFunction::BuiltinFunction AlphaFunction::GetBuiltinFunction() const
  75 {
  76   return static_cast<AlphaFunction::BuiltinFunction>( mBuiltin & BitMaskOfN( Log<COUNT>::value + 1 ) );
  77 }
  78
  79 AlphaFunction::Mode AlphaFunction::GetMode() const
  80 {
  81   return static_cast<AlphaFunction::Mode>( mMode & BitMaskOfN( 2 ) );
  82 }
  83
  84 } // namespace Dali