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 NodeDataProvider;
41 * Used to render an image.
43 class ImageRenderer : public Renderer, public TextureObserver
47 typedef Dali::ImageActor::PixelArea PixelArea;
56 GRID_NINE_PATCH_NO_CENTER ///< Not supported yet.
60 * Create a new ImageRenderer.
61 * @param dataprovider to render
62 * @return The newly allocated ImageRenderer.
64 static ImageRenderer* New( NodeDataProvider& dataprovider );
69 virtual ~ImageRenderer();
72 * Called in the render-thread when the renderer is removed
77 * Set the texture used to render.
78 * @param[in] textureId The id of the texture used to render.
80 void SetTextureId( ResourceId textureId );
83 * Set the pixel area for the renderer
84 * @param[in] pixelArea An area within the texture, used when building UV coordinates.
86 void SetPixelArea( const ImageRenderer::PixelArea& pixelArea );
89 * Set 9 patch border for the image renderer
90 * @param[in] border The border for nine-patch meshes.
91 * @param[in] borderInPixels True if border is in pixels instead of percentages.
93 void SetNinePatchBorder( const Vector4& border, bool inPixels );
96 * Set whether the ImageRenderer should use blending
97 * @param[in] useBlend True if blending should be used.
99 void SetUseBlend( bool useBlend );
102 * Set the blending options.
103 * @param[in] options A bitmask of blending options.
105 void SetBlendingOptions( unsigned int options );
108 * Set the blend color.
109 * @param[in] color The new blend-color.
111 void SetBlendColor( const Vector4& color );
114 * Calculate the mesh data used by the ImageRenderer.
115 * @param[in] type The type of mesh data required; either quad, nine-patch or grid.
116 * @param[in] targetSize The size which the mesh data should fit inside.
117 * @param[in] usePixelArea whether to use pixel area or not
119 void CalculateMeshData( MeshType type, const Vector2& targetSize, bool usePixelArea );
122 * @copydoc Dali::Internal::GlResourceOwner::GlContextDestroyed()
124 virtual void GlContextDestroyed();
127 * @copydoc Dali::Internal::GlResourceOwner::GlCleanup()
129 virtual void GlCleanup();
132 * @copydoc Dali::Internal::SceneGraph::Renderer::RequiresDepthTest()
134 virtual bool RequiresDepthTest() const;
137 * @copydoc Dali::Internal::SceneGraph::Renderer::CheckResources()
139 virtual bool CheckResources();
142 * @copydoc Dali::Internal::SceneGraph::Renderer::IsOutsideClipSpace()
144 virtual bool IsOutsideClipSpace( Context& context, const Matrix& modelMatrix, const Matrix& modelViewProjectionMatrix );
147 * @copydoc Dali::Internal::SceneGraph::Renderer::DoRender()
149 virtual void DoRender( Context& context, TextureCache& textureCache, BufferIndex bufferIndex, Program& program, const Matrix& modelViewMatrix, const Matrix& viewMatrix );
152 * @copydoc Dali::Internal::SceneGraph::Renderer::DoSetBlending()
154 virtual void DoSetBlending( Context& context, BufferIndex bufferIndex );
156 protected: // TextureObserver implementation
159 * @copydoc Dali::Internal::TextureObserver::TextureDiscarded()
161 virtual void TextureDiscarded( ResourceId textureId );
165 * Helper to update the vertex buffer.
167 void UpdateVertexBuffer( Context& context, GLsizeiptr size, const GLvoid *data );
170 * Helper to update the index buffer.
172 void UpdateIndexBuffer( Context& context, GLsizeiptr size, const GLvoid *data );
175 * Helper to generate mesh data when required
176 * @param[in] texture Texture from which to get UV data
178 void GenerateMeshData( Texture* texture );
181 * Helper to fill vertex/index buffers with quad data.
182 * (Quads are simple meshes, and thus have a specialised mesh generation method)
184 * @param[in] texture Texture from which to get UV data
186 * @param[in] pixelArea An area within the texture, used when building UV coordinates. A value of NULL means use default image size.
188 void SetQuadMeshData( Texture* texture, const Vector2& size, const PixelArea* pixelArea );
191 * Helper to fill vertex/index buffers with nine-patch data.
192 * (9-Patches are simple meshes, and thus have a specialised mesh generation method)
194 * @param[in] texture Texture from which to get UV data
195 * @param[in] size The target size.
196 * @param[in] border 9 patch border information.
197 * @param[in] borderInPixels True if border is in pixels instead of percentages.
198 * @param[in] pixelArea An area within the texture, used when building UV coordinates. A value of NULL means use default image size.
199 * @param[in] noCenter True if the center section of nine patch should not be rendered.
201 void SetNinePatchMeshData( Texture* texture, const Vector2& size, const Vector4& border, bool borderInPixels, const PixelArea* pixelArea, bool noCenter );
204 * Helper to fill vertex/index buffers with grid data.
205 * This can build grid meshes that are either of type Quad or type 9-Patch
207 * @param[in] size The target size.
208 * @param[in] border 9 patch border information (pass NULL for no border i.e. a standard Quad)
209 * @param[in] borderInPixels True if border is in pixels instead of percentages.
210 * @param[in] pixelArea An area within the texture, used when building UV coordinates. A value of NULL means use default image size.
212 void SetGridMeshData( Texture* texture, const Vector2& size, const Vector4* border, bool borderInPixels, const PixelArea* pixelArea );
215 * Helper to fill index buffer with uniform grid data.
216 * @param[in] indices pointer to indices buffer to be filled
217 * @param[in] rectanglesX number of columns for rectangles in grid
218 * @param[in] rectanglesY number of rows for rectangles in grid
220 void GenerateMeshIndices(GLushort* indices, int rectanglesX, int rectanglesY);
223 * Private constructor. @see New()
225 ImageRenderer( NodeDataProvider& dataprovider );
228 ImageRenderer( const ImageRenderer& );
231 ImageRenderer& operator=( const ImageRenderer& rhs );
237 OwnerPointer< GpuBuffer > mVertexBuffer;
238 OwnerPointer< GpuBuffer > mIndexBuffer;
241 PixelArea mPixelArea;
242 Vector2 mGeometrySize;
243 ResourceId mTextureId;
245 BlendingOptions mBlendingOptions;
248 MeshType mMeshType : 3; // 4 values fits in 3 bits just fine
249 bool mIsMeshGenerated : 1;
250 bool mBorderInPixels : 1;
251 bool mUseBlend : 1; ///< True if blending should be enabled, 1 bit is enough
252 bool mUsePixelArea : 1;
256 } // namespace SceneGraph
258 } // namespace Internal
262 #endif // __DALI_INTERNAL_SCENE_GRAPH_IMAGE_RENDERER_H__