1 #ifndef __DALI_INTERNAL_SCENE_GRAPH_SHADER_H__
2 #define __DALI_INTERNAL_SCENE_GRAPH_SHADER_H__
5 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/internal/common/shader-data.h>
23 #include <dali/internal/update/common/property-owner.h>
24 #include <dali/internal/update/common/scene-graph-connection-change-propagator.h>
38 class ConnectionObserver;
39 class SceneController;
41 * A holder class for Program; also enables sharing of uniform properties
43 class Shader : public PropertyOwner, public UniformMap::Observer
49 * @param hints Shader hints
51 Shader( Dali::Shader::Hint::Value& hints );
58 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
59 // The following methods are called during Update
60 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
63 * Query whether a shader hint is set.
64 * @pre The shader has been initialized.
65 * @param[in] hint The hint to check.
66 * @return True if the given hint is set.
68 bool HintEnabled( Dali::Shader::Hint::Value hint ) const
74 * @return True if the fragment shader outputs only 1.0 on the alpha channel
76 * @note Shaders that can output any value on the alpha channel
77 * including 1.0 should return false for this.
79 bool IsOutputOpaque();
82 * @return True if the fragment shader can output any value but 1.0 on the alpha channel
84 * @note Shaders that can output any value on the alpha channel
85 * including 1.0 should return false for this
87 bool IsOutputTransparent();
90 * @copydoc Dali::Internal::SceneGraph::PropertyOwner::ResetDefaultProperties
92 virtual void ResetDefaultProperties( BufferIndex updateBufferIndex )
94 // no default properties
97 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
98 // The following methods are called during Render
99 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
102 * @brief Set the program for this shader.
103 * @param[in] shaderData The program's vertex/fragment source and optionally precompiled shader binary.
104 * @param[in] programCache Owner of the Programs.
105 * @param[in] modifiesGeometry True if the vertex shader changes the positions of vertexes such that
106 * they might exceed the bounding box of vertexes passing through the default transformation.
108 void SetProgram( Internal::ShaderDataPtr shaderData,
109 ProgramCache* programCache,
110 bool modifiesGeometry );
113 * Get the program built for this shader
114 * @return The program built from the shader sources.
116 Program* GetProgram();
118 public: // Implementation of ConnectionChangePropagator
121 * @copydoc ConnectionChangePropagator::AddObserver
123 void AddConnectionObserver(ConnectionChangePropagator::Observer& observer);
126 * @copydoc ConnectionChangePropagator::RemoveObserver
128 void RemoveConnectionObserver(ConnectionChangePropagator::Observer& observer);
130 public: // UniformMap::Observer
132 * @copydoc UniformMap::Observer::UniformMappingsChanged
134 virtual void UniformMappingsChanged( const UniformMap& mappings );
138 Dali::Shader::Hint::Value mHints;
142 ConnectionChangePropagator mConnectionObservers;
145 } // namespace SceneGraph
147 } // namespace Internal
151 #endif // __DALI_INTERNAL_SCENE_GRAPH_SHADER_H__