dali-toolkit/devel-api/shader-effects/motion-stretch-effect.cpp

   1 /*
   2  * Copyright (c) 2021 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 // CLASS HEADER
  18 #include <dali-toolkit/devel-api/shader-effects/motion-stretch-effect.h>
  19
  20 // EXTERNAL INCLUDES
  21 #include <dali/public-api/actors/actor.h>
  22 #include <dali/public-api/animation/constraints.h>
  23 #include <dali/public-api/object/property-map.h>
  24 #include <dali/public-api/rendering/shader.h>
  25
  26 // INTERNAL INCLUDES
  27 #include <dali-toolkit/internal/graphics/builtin-shader-extern-gen.h>
  28 #include <dali-toolkit/public-api/visuals/visual-properties.h>
  29
  30 namespace Dali
  31 {
  32 namespace Toolkit
  33 {
  34 void SetMotionStretchProperties(Actor& actor)
  35 {
  36   actor.RegisterProperty("uGeometryStretchFactor", 0.5f);
  37   actor.RegisterProperty("uSpeedScalingFactor", 0.5f);
  38   actor.RegisterProperty("uObjectFadeStart", Vector2(0.25f, 0.25f));
  39   actor.RegisterProperty("uObjectFadeEnd", Vector2(0.5f, 0.5f));
  40   actor.RegisterProperty("uAlphaScale", 0.75f);
  41   Property::Index uModelProperty = actor.RegisterProperty("uModelLastFrame", Matrix::IDENTITY);
  42
  43   Constraint constraint = Constraint::New<Matrix>(actor, uModelProperty, EqualToConstraint());
  44   constraint.AddSource(Source(actor, Actor::Property::WORLD_MATRIX));
  45   constraint.Apply();
  46 }
  47
  48 Property::Map CreateMotionStretchEffect()
  49 {
  50   Property::Map map;
  51
  52   Property::Map customShader;
  53   customShader[Visual::Shader::Property::VERTEX_SHADER]   = SHADER_MOTION_STRETCH_EFFECT_VERT.data();
  54   customShader[Visual::Shader::Property::FRAGMENT_SHADER] = SHADER_MOTION_STRETCH_EFFECT_FRAG.data();
  55
  56   customShader[Visual::Shader::Property::SUBDIVIDE_GRID_X] = 10;
  57   customShader[Visual::Shader::Property::SUBDIVIDE_GRID_Y] = 10;
  58
  59   customShader[Visual::Shader::Property::HINTS] = Shader::Hint::OUTPUT_IS_TRANSPARENT;
  60
  61   map[Toolkit::Visual::Property::SHADER] = customShader;
  62   return map;
  63 }
  64
  65 } // namespace Toolkit
  66 } // namespace Dali