2 // Copyright (c) 2014 Samsung Electronics Co., Ltd.
4 // Licensed under the Flora License, Version 1.0 (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
8 // http://floralicense.org/license/
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.
18 #include <dali-toolkit/public-api/shader-effects/overlay-effect.h>
26 OverlayEffect::OverlayEffect()
30 OverlayEffect::~OverlayEffect()
34 OverlayEffect OverlayEffect::New( Image overlayImage )
36 // (Target > 0.5) * (1 - (1-2*(Target-0.5)) * (1-Blend)) + (Target <= 0.5) * ((2*Target) * Blend)
37 const char* OVERLAY_FRAGMENT_SHADER_SOURCE =
40 " lowp vec4 target = texture2D(sTexture, vTexCoord);\n"
41 " lowp vec4 overlay = texture2D(sEffect, vTexCoord);\n"
42 " if ( length( target.rgb ) > 0.5 )\n"
44 " gl_FragColor = vec4( mix( target.rgb, 1.0 - ( 1.0 - 2.0 * ( target.rgb - 0.5 ) ) * ( 1.0 - overlay.rgb ), overlay.a ), min( 1.0, target.a + overlay.a ) );\n"
48 " gl_FragColor = vec4( mix( target.rgb, 2.0 * target.rgb * overlay.rgb, overlay.a ), target.a + overlay.a );\n"
52 ShaderEffect shader = ShaderEffect::New( "", // Use default
53 OVERLAY_FRAGMENT_SHADER_SOURCE,
54 GeometryType( GEOMETRY_TYPE_IMAGE ),
55 ShaderEffect::GeometryHints( ShaderEffect::HINT_BLENDING ) );
57 shader.SetEffectImage( overlayImage );
59 return OverlayEffect( shader );
62 //Call the Parent copy constructor to add reference to the implementation for this object
63 OverlayEffect::OverlayEffect( ShaderEffect handle )
64 : ShaderEffect( handle )
68 } // namespace Toolkit