1 #ifndef __DALI_ENCODED_BUFFER_IMAGE_H__
2 #define __DALI_ENCODED_BUFFER_IMAGE_H__
5 * Copyright (c) 2018 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/image-operations.h>
24 #include <dali/public-api/math/uint-16-pair.h>
29 * @addtogroup dali_core_images
33 namespace Internal DALI_INTERNAL
35 class EncodedBufferImage;
38 typedef Uint16Pair ImageDimensions;
44 * @brief EncodedBufferImage represents an image resource as a buffer of encoded pixel data.
46 * A memory buffer of encoded image data is provided by the application and
47 * decoded asynchronously on a background thread to fill the image's
50 * The buffer of data provided to an EncodedBufferImage factory function
51 * (New) should be filled with encoded image data in one of %Dali's
52 * supported image file formats, with the sequence of bytes in the buffer
53 * exactly matching the sequence of bytes that a file in the file system
54 * holding the encoded image data would have.
56 * The application may free the encoded image buffer passed to one of the
57 * New() static factory member functions as soon as they return.
61 * Image::LoadingFinishedSignal is emitted when the decoding of the
62 * image data is completed, either successfully or not.
64 * Image::UploadedSignal is emitted when the decoded image data gets
65 * uploaded to the OpenGL ES implementation.
68 class DALI_CORE_API EncodedBufferImage : public Image
75 * @brief Constructor which creates an uninitialized EncodedBufferImage object.
77 * Use @ref EncodedBufferImage::New to create an initialised object.
80 EncodedBufferImage() DALI_DEPRECATED_API;
85 * @brief Creates an initialized image object from an encoded image buffer in memory.
88 * @param[in] encodedImage The encoded bytes of an image, in a supported
89 * image format such as PNG, JPEG, GIF, BMP, KTX, ICO, and WBMP, organised
90 * exactly as it would be as a file in the filesystem.
91 * The caller retains ownership of this buffer and is free to modify or
92 * discard it as soon as the function returns
93 * @param[in] encodedImageByteCount The size in bytes of the buffer pointed to
95 * @return A handle to a newly allocated object
97 static EncodedBufferImage New( const uint8_t * const encodedImage, std::size_t encodedImageByteCount ) DALI_DEPRECATED_API;
102 * @brief Creates an initialized image object from an encoded image buffer in memory.
105 * @param[in] encodedImage The encoded bytes of an image, in a supported
106 * image format such as PNG, JPEG, GIF, BMP, KTX, ICO, and WBMP, organised
107 * exactly as it would be as a file in the filesystem.
108 * The caller retains ownership of this buffer and is free to modify or
109 * discard it as soon as the function returns
110 * @param[in] encodedImageByteCount The size in bytes of the buffer pointed to
112 * @param[in] size The width and height to fit the loaded image to
113 * @param[in] fittingMode The method used to fit the shape of the image before loading to the shape defined by the size parameter
114 * @param[in] samplingMode The filtering method used when sampling pixels from the input image while fitting it to desired size
115 * @param[in] orientationCorrection Reorient the image to respect any orientation metadata in its header
116 * policy is set, a reload will not be possible, so the Image should never be
117 * used once all actors using it have gone off-stage
118 * @return A handle to a newly allocated object
120 static EncodedBufferImage New( const uint8_t * const encodedImage, std::size_t encodedImageByteCount, ImageDimensions size, FittingMode::Type fittingMode, SamplingMode::Type samplingMode, bool orientationCorrection = true ) DALI_DEPRECATED_API;
125 * @brief Downcasts a handle to EncodedBufferImage handle.
127 * If handle points to a EncodedBufferImage, the
128 * downcast produces valid handle. If not, the returned handle is left uninitialized.
130 * @param[in] handle Handle to an object
131 * @return Handle to a EncodedBufferImage or an uninitialized handle
133 static EncodedBufferImage DownCast( BaseHandle handle ) DALI_DEPRECATED_API;
140 * This is non-virtual since derived Handle types must not contain data or virtual methods.
143 ~EncodedBufferImage() DALI_DEPRECATED_API;
148 * @brief This copy constructor is required for (smart) pointer semantics.
151 * @param[in] handle A reference to the copied handle
153 EncodedBufferImage(const EncodedBufferImage& handle) DALI_DEPRECATED_API;
158 * @brief This assignment operator is required for (smart) pointer semantics.
161 * @param[in] rhs A reference to the copied handle
162 * @return A reference to this
164 EncodedBufferImage& operator=(const EncodedBufferImage& rhs) DALI_DEPRECATED_API;
166 public: // Not intended for application developers
168 explicit DALI_INTERNAL EncodedBufferImage(Internal::EncodedBufferImage*);
176 #endif // __DALI_ENCODED_BUFFER_IMAGE_H__