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

   1 /*
   2  * Copyright (c) 2018 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 uint32_t BitMaskOfN( uint32_t bits )
  29 {
  30   return ( 1 << bits ) - 1;
  31 }
  32
  33 } // unnamed namespace
  34
  35 AlphaFunction::AlphaFunction()
  36 :mBezierControlPoints(Vector4::ZERO),
  37  mCustom(0),
  38  mBuiltin(DEFAULT),
  39  mMode(BUILTIN_FUNCTION)
  40 {}
  41
  42 AlphaFunction::AlphaFunction( BuiltinFunction function)
  43 :mBezierControlPoints(Vector4::ZERO),
  44  mCustom(0),
  45  mBuiltin(function),
  46  mMode(BUILTIN_FUNCTION)
  47 {}
  48
  49 AlphaFunction::AlphaFunction( AlphaFunctionPrototype function)
  50 :mBezierControlPoints(Vector4::ZERO),
  51  mCustom(function),
  52  mBuiltin(DEFAULT),
  53  mMode(CUSTOM_FUNCTION)
  54 {}
  55
  56 AlphaFunction::AlphaFunction( const Vector2& controlPoint0, const Vector2& controlPoint1 )
  57 :mBezierControlPoints(Vector4(Clamp(controlPoint0.x,0.0f,1.0f),controlPoint0.y,
  58                               Clamp(controlPoint1.x,0.0f,1.0f),controlPoint1.y)),
  59  mCustom(0),
  60  mBuiltin(DEFAULT),
  61  mMode(BEZIER)
  62 {
  63 }
  64
  65 Vector4 AlphaFunction::GetBezierControlPoints() const
  66 {
  67   return mBezierControlPoints;
  68 }
  69
  70 AlphaFunctionPrototype AlphaFunction::GetCustomFunction() const
  71 {
  72   return mCustom;
  73 }
  74
  75 AlphaFunction::BuiltinFunction AlphaFunction::GetBuiltinFunction() const
  76 {
  77   return static_cast<AlphaFunction::BuiltinFunction>( mBuiltin & BitMaskOfN( Log<COUNT>::value + 1 ) );
  78 }
  79
  80 AlphaFunction::Mode AlphaFunction::GetMode() const
  81 {
  82   return static_cast<AlphaFunction::Mode>( mMode & BitMaskOfN( 2 ) );
  83 }
  84
  85 } // namespace Dali