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 Shader hints
52 Shader( Dali::Shader::Hint::Value& hints );
59 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
60 // The following methods are called during UpdateManager::Update()
61 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
64 * Query whether a shader hint is set.
65 * @pre The shader has been initialized.
66 * @param[in] hint The hint to check.
67 * @return True if the given hint is set.
69 bool HintEnabled( Dali::Shader::Hint::Value hint ) const
75 * @return True if the fragment shader outputs only 1.0 on the alpha channel
77 * @note Shaders that can output any value on the alpha channel
78 * including 1.0 should return false for this.
80 bool IsOutputOpaque();
83 * @return True if the fragment shader can output any value but 1.0 on the alpha channel
85 * @note Shaders that can output any value on the alpha channel
86 * including 1.0 should return false for this
88 bool IsOutputTransparent();
91 * @copydoc Dali::Internal::SceneGraph::PropertyOwner::ResetDefaultProperties
93 virtual void ResetDefaultProperties( BufferIndex updateBufferIndex )
95 // no default properties
98 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
99 // The following methods are called in Render thread
100 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
103 * @brief Set the program for this shader.
104 * @param[in] shaderData The program's vertex/fragment source and optionally precompiled shader binary.
105 * @param[in] programCache Owner of the Programs.
106 * @param[in] modifiesGeometry True if the vertex shader changes the positions of vertexes such that
107 * they might exceed the bounding box of vertexes passing through the default transformation.
109 void SetProgram( Internal::ShaderDataPtr shaderData,
110 ProgramCache* programCache,
111 bool modifiesGeometry );
114 * Get the program built for this shader
115 * @return The program built from the shader sources.
117 Program* GetProgram();
119 public: // Implementation of ObjectOwnerContainer template methods
122 * Connect the object to the scene graph
124 * @param[in] sceneController The scene controller - used for sending messages to render thread
125 * @param[in] bufferIndex The current buffer index - used for sending messages to render thread
127 void ConnectToSceneGraph( SceneController& sceneController, BufferIndex bufferIndex );
130 * Disconnect the object from the scene graph
131 * @param[in] sceneController The scene controller - used for sending messages to render thread
132 * @param[in] bufferIndex The current buffer index - used for sending messages to render thread
134 void DisconnectFromSceneGraph( SceneController& sceneController, BufferIndex bufferIndex );
136 public: // Implementation of ConnectionChangePropagator
139 * @copydoc ConnectionChangePropagator::AddObserver
141 void AddConnectionObserver(ConnectionChangePropagator::Observer& observer);
144 * @copydoc ConnectionChangePropagator::RemoveObserver
146 void RemoveConnectionObserver(ConnectionChangePropagator::Observer& observer);
150 public: // UniformMap::Observer
152 * @copydoc UniformMap::Observer::UniformMappingsChanged
154 virtual void UniformMappingsChanged( const UniformMap& mappings );
158 Dali::Shader::Hint::Value mHints;
162 ConnectionChangePropagator mConnectionObservers;
165 } // namespace SceneGraph
167 } // namespace Internal
171 #endif // __DALI_INTERNAL_SCENE_GRAPH_SHADER_H__