1 #ifndef __DALI_INTERNAL_SCENE_GRAPH_SHADER_H__
2 #define __DALI_INTERNAL_SCENE_GRAPH_SHADER_H__
5 * Copyright (c) 2015 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/public-api/shader-effects/shader-effect.h>
23 #include <dali/internal/common/shader-data.h>
24 #include <dali/internal/update/common/property-owner.h>
25 #include <dali/internal/update/common/scene-graph-connection-change-propagator.h>
39 class ConnectionObserver;
40 class SceneController;
42 * A holder class for Program; also enables sharing of uniform properties
44 class Shader : public PropertyOwner, public UniformMap::Observer
50 * @param hints Geometry hints
52 Shader( Dali::ShaderEffect::GeometryHints& hints );
59 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
60 // The following methods are called during UpdateManager::Update()
61 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
64 * Query whether a shader geometry hint is set.
65 * @pre The shader has been initialized.
66 * @param[in] hint The geometry hint to check.
67 * @return True if the given geometry hint is set.
69 bool GeometryHintEnabled( Dali::ShaderEffect::GeometryHints hint ) const
71 return mGeometryHints & hint;
75 * Retrieve the set of geometry hints.
78 Dali::ShaderEffect::GeometryHints GetGeometryHints() const
80 return mGeometryHints;
84 * Set the geometry hints.
85 * @param[in] hints The hints.
87 void SetGeometryHints( Dali::ShaderEffect::GeometryHints hints )
89 mGeometryHints = hints;
93 * @return True if the fragment shader outputs only 1.0 on the alpha channel
95 * @note Shaders that can output any value on the alpha channel
96 * including 1.0 should return false for this.
98 bool IsOutputOpaque();
101 * @return True if the fragment shader can output any value but 1.0 on the alpha channel
103 * @note Shaders that can output any value on the alpha channel
104 * including 1.0 should return false for this
106 bool IsOutputTransparent();
109 * @copydoc Dali::Internal::SceneGraph::PropertyOwner::ResetDefaultProperties
111 virtual void ResetDefaultProperties( BufferIndex updateBufferIndex )
113 // no default properties
116 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
117 // The following methods are called in Render thread
118 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
121 * @brief Set the program for this shader.
122 * @param[in] shaderData The program's vertex/fragment source and optionally precompiled shader binary.
123 * @param[in] programCache Owner of the Programs.
124 * @param[in] modifiesGeometry True if the vertex shader changes the positions of vertexes such that
125 * they might exceed the bounding box of vertexes passing through the default transformation.
127 void SetProgram( Internal::ShaderDataPtr shaderData,
128 ProgramCache* programCache,
129 bool modifiesGeometry );
132 * Get the program built for this shader
133 * @return The program built from the shader sources.
135 Program* GetProgram();
137 public: // Implementation of ObjectOwnerContainer template methods
140 * Connect the object to the scene graph
142 * @param[in] sceneController The scene controller - used for sending messages to render thread
143 * @param[in] bufferIndex The current buffer index - used for sending messages to render thread
145 void ConnectToSceneGraph( SceneController& sceneController, BufferIndex bufferIndex );
148 * Disconnect the object from the scene graph
149 * @param[in] sceneController The scene controller - used for sending messages to render thread
150 * @param[in] bufferIndex The current buffer index - used for sending messages to render thread
152 void DisconnectFromSceneGraph( SceneController& sceneController, BufferIndex bufferIndex );
154 public: // Implementation of ConnectionChangePropagator
157 * @copydoc ConnectionChangePropagator::AddObserver
159 void AddConnectionObserver(ConnectionChangePropagator::Observer& observer);
162 * @copydoc ConnectionChangePropagator::RemoveObserver
164 void RemoveConnectionObserver(ConnectionChangePropagator::Observer& observer);
168 public: // UniformMap::Observer
170 * @copydoc UniformMap::Observer::UniformMappingsChanged
172 virtual void UniformMappingsChanged( const UniformMap& mappings );
176 Dali::ShaderEffect::GeometryHints mGeometryHints; ///< shader geometry hints for building the geometry
180 ConnectionChangePropagator mConnectionObservers;
183 } // namespace SceneGraph
185 } // namespace Internal
189 #endif // __DALI_INTERNAL_SCENE_GRAPH_SHADER_H__