1 #ifndef __DALI_INTERNAL_SCENE_GRAPH_IMAGE_RENDERER_H__
2 #define __DALI_INTERNAL_SCENE_GRAPH_IMAGE_RENDERER_H__
5 * Copyright (c) 2014 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/actors/image-actor.h>
23 #include <dali/internal/common/owner-pointer.h>
24 #include <dali/internal/update/resources/resource-manager-declarations.h>
25 #include <dali/internal/render/gl-resources/context.h>
26 #include <dali/internal/render/gl-resources/texture-observer.h>
27 #include <dali/internal/render/renderers/scene-graph-renderer.h>
38 class RenderDataProvider;
41 * Used to render an image.
43 class ImageRenderer : public Renderer, public TextureObserver
47 typedef Dali::ImageActor::PixelArea PixelArea;
58 * Create a new ImageRenderer.
59 * @param dataprovider to render
60 * @return The newly allocated ImageRenderer.
62 static ImageRenderer* New( RenderDataProvider& dataprovider );
67 virtual ~ImageRenderer();
70 * Set the texture used to render.
71 * @param[in] textureId The id of the texture used to render.
73 void SetTextureId( ResourceId textureId );
76 * Set the pixel area for the renderer
77 * @param[in] pixelArea An area within the texture, used when building UV coordinates.
79 void SetPixelArea( const ImageRenderer::PixelArea& pixelArea );
82 * Set 9 patch border for the image renderer
83 * @param[in] border The border for nine-patch meshes.
84 * @param[in] borderInPixels True if border is in pixels instead of percentages.
86 void SetNinePatchBorder( const Vector4& border, bool inPixels );
89 * Calculate the mesh data used by the ImageRenderer.
90 * @param[in] type The type of mesh data required; either quad, nine-patch or grid.
91 * @param[in] targetSize The size which the mesh data should fit inside.
92 * @param[in] usePixelArea whether to use pixel area or not
94 void CalculateMeshData( MeshType type, const Vector2& targetSize, bool usePixelArea );
97 * @copydoc Dali::Internal::GlResourceOwner::GlContextDestroyed()
99 virtual void GlContextDestroyed();
102 * @copydoc Dali::Internal::GlResourceOwner::GlCleanup()
104 virtual void GlCleanup();
107 * @copydoc Dali::Internal::SceneGraph::Renderer::RequiresDepthTest()
109 virtual bool RequiresDepthTest() const;
112 * @copydoc Dali::Internal::SceneGraph::Renderer::CheckResources()
114 virtual bool CheckResources();
117 * @copydoc Dali::Internal::SceneGraph::Renderer::DoRender()
119 virtual void DoRender( BufferIndex bufferIndex, const Matrix& modelViewMatrix, const Matrix& modelMatrix, const Matrix& viewMatrix, const Matrix& projectionMatrix, const Vector4& color );
121 protected: // TextureObserver implementation
124 * @copydoc Dali::Internal::TextureObserver::TextureDiscarded()
126 virtual void TextureDiscarded( ResourceId textureId );
130 * Helper to update the vertex buffer.
132 void UpdateVertexBuffer( GLsizeiptr size, const GLvoid *data );
135 * Helper to update the index buffer.
137 void UpdateIndexBuffer( GLsizeiptr size, const GLvoid *data );
140 * Helper to generate mesh data when required
141 * @param[in] texture Texture from which to get UV data
143 void GenerateMeshData( Texture* texture );
146 * Helper to fill vertex/index buffers with quad data.
147 * (Quads are simple meshes, and thus have a specialised mesh generation method)
149 * @param[in] texture Texture from which to get UV data
151 * @param[in] pixelArea An area within the texture, used when building UV coordinates. A value of NULL means use default image size.
153 void SetQuadMeshData( Texture* texture, const Vector2& size, const PixelArea* pixelArea );
156 * Helper to fill vertex/index buffers with nine-patch data.
157 * (9-Patches are simple meshes, and thus have a specialised mesh generation method)
159 * @param[in] texture Texture from which to get UV data
160 * @param[in] size The target size.
161 * @param[in] border 9 patch border information.
162 * @param[in] borderInPixels True if border is in pixels instead of percentages.
163 * @param[in] pixelArea An area within the texture, used when building UV coordinates. A value of NULL means use default image size.
165 void SetNinePatchMeshData( Texture* texture, const Vector2& size, const Vector4& border, bool borderInPixels, const PixelArea* pixelArea );
168 * Helper to fill vertex/index buffers with grid data.
169 * This can build grid meshes that are either of type Quad or type 9-Patch
171 * @param[in] size The target size.
172 * @param[in] border 9 patch border information (pass NULL for no border i.e. a standard Quad)
173 * @param[in] borderInPixels True if border is in pixels instead of percentages.
174 * @param[in] pixelArea An area within the texture, used when building UV coordinates. A value of NULL means use default image size.
176 void SetGridMeshData( Texture* texture, const Vector2& size, const Vector4* border, bool borderInPixels, const PixelArea* pixelArea );
179 * Helper to fill index buffer with uniform grid data.
180 * @param[in] indices pointer to indices buffer to be filled
181 * @param[in] rectanglesX number of columns for rectangles in grid
182 * @param[in] rectanglesY number of rows for rectangles in grid
184 void GenerateMeshIndices(GLushort* indices, int rectanglesX, int rectanglesY);
187 * Private constructor. @see New()
189 ImageRenderer(RenderDataProvider& dataprovider);
192 ImageRenderer(const ImageRenderer&);
195 ImageRenderer& operator=(const ImageRenderer& rhs);
201 OwnerPointer< GpuBuffer > mVertexBuffer;
202 OwnerPointer< GpuBuffer > mIndexBuffer;
205 PixelArea mPixelArea;
206 Vector2 mGeometrySize;
208 ResourceId mTextureId;
211 MeshType mMeshType : 3; // 4 values fits in 3 bits just fine
212 bool mIsMeshGenerated : 1;
213 bool mBorderInPixels : 1;
214 bool mUsePixelArea : 1;
218 } // namespace SceneGraph
220 } // namespace Internal
224 #endif // __DALI_INTERNAL_SCENE_GRAPH_IMAGE_RENDERER_H__