1 #ifndef __DALI_FRAME_BUFFER_IMAGE_H__
2 #define __DALI_FRAME_BUFFER_IMAGE_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/images/image.h>
23 #include <dali/public-api/images/native-image-interface.h>
24 #include <dali/public-api/images/pixel.h>
29 * @addtogroup dali-core-images
33 namespace Internal DALI_INTERNAL
35 class FrameBufferImage;
38 namespace RenderBuffer
41 * @brief Render Buffer formats
42 * The default format for framebuffer creation is COLOR, so If a depth buffer for 3D rendering is required use
45 enum Format ///< Framebuffer format, default color depth is RGBA 32 bit with alpha
47 COLOR, ///< Framebuffer will be created with color buffer.
48 COLOR_DEPTH, ///< Framebuffer will be created with color and depth buffer
49 COLOR_STENCIL, ///< Framebuffer will be created with color and stencil buffer
50 COLOR_DEPTH_STENCIL ///< Framebuffer will be created with color, depth and stencil buffer. NOTE: May be not supported in all devices
55 * @brief FrameBufferImage represents a GLES Frame Buffer Object and contains the result
56 * of an 'off screen' render pass of a RenderTask.
57 * The FrameBufferImage can then be used with an ImageActor (with optional shader
58 * effects) and rendered to the screen.
60 class DALI_IMPORT_API FrameBufferImage : public Image
64 * @brief Constructor which creates an uninitialized FrameBufferImage object.
66 * Use Image::New(...) to create an initialised object.
71 * @brief Create a new FrameBufferImage.
73 * The maximum size of the image is limited by GL_MAX_TEXTURE_SIZE.
74 * The ReleasePolicy defaults to Dali::Image::Never.
75 * @param [in] width The width in pixels. Setting to zero will use the width of the stage.
76 * @param [in] height The height in pixels. Setting to zero will use the height of the stage.
77 * @param [in] pixelFormat The pixel format (rgba 32 bit by default)
78 * @param [in] bufferFormat The format of the buffers that are going to be created for the FBO, (COLOR and DEPTH buffer as default)
79 * @post When the FrameBufferImage is first used as a render target, an exception may be thrown if pixelFormat is not supported on the hardware platform.
80 * @return A handle to a new instance of a FrameBufferImage.
82 static FrameBufferImage New(unsigned int width = 0, unsigned int height = 0, Pixel::Format pixelFormat = Pixel::RGBA8888,
83 RenderBuffer::Format bufferFormat = RenderBuffer::COLOR);
86 * @brief Create a new FrameBufferImage.
88 * The maximum size of the image is limited by GL_MAX_TEXTURE_SIZE.
89 * @param [in] width The width in pixels. Setting to zero will use the width of the stage.
90 * @param [in] height The height in pixels. Setting to zero will use the height of the stage.
91 * @param [in] pixelFormat The pixel format.
92 * @param [in] releasePolicy The ReleasePolicy to apply to the FrameBufferImage.
93 * @param [in] bufferFormat The format of the buffers that are going to be created for the FBO, (COLOR and DEPTH buffer as default)
95 * Note that there is no need for a LoadPolicy - by definition it is always OnDemand, since there is no point in the FrameBufferImage existing unless someone is rendering to
96 * it, or it is being used as an input (e.g. ShaderEffect / ImageActor).
98 * @post When the FrameBufferImage is first used as a render target, an exception may be thrown if pixelFormat is not supported on the hardware platform.
99 * @return A handle to a new instance of a FrameBufferImage.
101 static FrameBufferImage New(unsigned int width, unsigned int height, Pixel::Format pixelFormat, ReleasePolicy releasePolicy,
102 RenderBuffer::Format bufferFormat = RenderBuffer::COLOR);
105 * @brief Create a new FrameBufferImage.
107 * The maximum size of the image is limited by GL_MAX_TEXTURE_SIZE.
108 * @param [in] image The native image.
110 * Note that there is no need for a LoadPolicy - by definition it is always OnDemand, since there is no point in the FrameBufferImage existing unless someone is rendering to
111 * it, or it is being used as an input (e.g. ShaderEffect / ImageActor).
113 * @post When the FrameBufferImage is first used as a render target, an exception may be thrown if the NativeImage cannot be mapped to a texture.
114 * @return A handle to a new instance of a FrameBufferImage.
116 static FrameBufferImage New(NativeImageInterface& image);
119 * @brief Create a new FrameBufferImage.
121 * The maximum size of the image is limited by GL_MAX_TEXTURE_SIZE.
122 * @param [in] image The native image.
123 * @param [in] releasePolicy The ReleasePolicy to apply to the FrameBufferImage.
125 * Note that there is no need for a LoadPolicy - by definition it is always OnDemand, since there is no point in the FrameBufferImage existing unless someone is rendering to
126 * it, or it is being used as an input (e.g. ShaderEffect / ImageActor).
128 * @post When the FrameBufferImage is first used as a render target, an exception may be thrown if the NativeImage cannot be mapped to a texture.
129 * @return A handle to a new instance of a FrameBufferImage.
131 static FrameBufferImage New(NativeImageInterface& image, ReleasePolicy releasePolicy);
134 * @brief Downcast an Object handle to FrameBufferImage handle.
136 * If handle points to a FrameBufferImage object the
137 * downcast produces valid handle. If not the returned handle is left uninitialized.
138 * @param[in] handle to An object
139 * @return handle to a FrameBufferImage object or an uninitialized handle
141 static FrameBufferImage DownCast( BaseHandle handle );
146 * This is non-virtual since derived Handle types must not contain data or virtual methods.
151 * @brief This copy constructor is required for (smart) pointer semantics.
153 * @param [in] handle A reference to the copied handle
155 FrameBufferImage(const FrameBufferImage& handle);
158 * @brief This assignment operator is required for (smart) pointer semantics.
160 * @param [in] rhs A reference to the copied handle
161 * @return A reference to this
163 FrameBufferImage& operator=(const FrameBufferImage& rhs);
165 public: // Not intended for application developers
167 explicit DALI_INTERNAL FrameBufferImage(Internal::FrameBufferImage*);
168 }; //class FrameBufferImage
175 #endif // __DALI_FRAME_BUFFER_IMAGE_H__