dali-toolkit/devel-api/shader-effects/blind-effect.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 #include <dali-toolkit/devel-api/shader-effects/blind-effect.h>
  19
  20 namespace Dali
  21 {
  22
  23 namespace Toolkit
  24 {
  25
  26 namespace
  27 {
  28
  29 const std::string STEP_PROPERTY_NAME( "uStep" );
  30
  31 } // namespace
  32
  33 BlindEffect::BlindEffect()
  34 {
  35 }
  36
  37 //Call the Parent copy constructor to add reference to the implementation for this object
  38 BlindEffect::BlindEffect(ShaderEffect handle)
  39 :ShaderEffect(handle)
  40 {
  41 }
  42
  43 BlindEffect::~BlindEffect()
  44 {
  45 }
  46
  47
  48 BlindEffect BlindEffect::New()
  49 {
  50   std::string fragmentShader(
  51     "uniform mediump float uStep;                                                        \n"
  52     "void main()                                                                         \n"
  53     "{                                                                                   \n"
  54     "    mediump vec4 alphaColor;                                                        \n"
  55     "    mediump vec4 baseColor;                                                         \n"
  56     "    baseColor = texture2D( sTexture, vTexCoord);                                    \n"
  57     "    alphaColor = vec4(0.1,0.1,0.1,1.0);                                             \n"
  58     "    lowp float index = 0.0;                                                         \n"
  59     "    index = floor(vTexCoord.y/0.1);                                                 \n"
  60     "    if((vTexCoord.y < (index * 0.1 + uStep * 0.005)) && (vTexCoord.y > index * 0.1))\n"
  61     "    {                                                                               \n"
  62     "      gl_FragColor = alphaColor;                                                    \n"
  63     "    }                                                                               \n"
  64     "    else                                                                            \n"
  65     "    {                                                                               \n"
  66     "      gl_FragColor = baseColor;                                                     \n"
  67     "    }                                                                               \n"
  68     "    gl_FragColor*=uColor;                                                           \n"
  69     "}                                                                                   \n"
  70   );
  71
  72   Dali::ShaderEffect shaderEffectCustom =  Dali::ShaderEffect::New(
  73       "",
  74       fragmentShader,
  75       Dali::GeometryType( GEOMETRY_TYPE_IMAGE ),
  76       ShaderEffect::GeometryHints( ShaderEffect::HINT_BLENDING | ShaderEffect::HINT_GRID ));
  77
  78   Dali::Toolkit::BlindEffect handle( shaderEffectCustom );
  79
  80   handle.SetUniform( STEP_PROPERTY_NAME, 0.0f );
  81
  82   return handle;
  83 }
  84
  85 void BlindEffect::SetStep(float step)
  86 {
  87   SetUniform( STEP_PROPERTY_NAME, step );
  88 }
  89
  90 const std::string& BlindEffect::GetStepPropertyName() const
  91 {
  92   return STEP_PROPERTY_NAME;
  93 }
  94
  95 } // namespace Toolkit
  96
  97 } // namespace Dali