1 #ifndef __DALI_NINE_PATCH_IMAGE_H__
2 #define __DALI_NINE_PATCH_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/resource-image.h>
23 #include <dali/public-api/images/buffer-image.h>
24 #include <dali/public-api/math/rect.h>
29 * @addtogroup dali_core_images
33 namespace Internal DALI_INTERNAL
39 * @brief NinePatchImage represents a stretchable image resource
41 * It contains a bitmap that is synchronously loaded from the file system that contains
42 * a 9 patch border - a 1 pixel border that describes the stretch borders and the child
45 * The class offers an API to read the stretch area and child area, but it does not
46 * remove the border from it's bitmap. An API can be used to obtain a BufferImage with
49 * Adding this image to an ImageActor using an Image handle will automatically convert
50 * to use the cropped BufferImage - if you don't retain a handle to this object, it will
51 * be automatically destroyed.
53 class DALI_IMPORT_API NinePatchImage : public ResourceImage
56 typedef Vector< Uint16Pair > StretchRanges;
60 * @brief Constructor which creates an uninitialized NinePatchImage object.
62 * Use Image::New(...) to create an initialised object.
67 * @brief Create a new NinePatchImage.
69 * A pixel buffer for image data is allocated and loaded from the filesystem.
70 * Dali has ownership of the buffer.
71 * @note: default resource management policies are Immediate and Never
73 * @param [in] filename File to load synchronously into buffer
74 * @return a handle to a new instance of NinePatchImage
76 static NinePatchImage New( const std::string& filename );
79 * @brief Downcast an Object handle to NinePatchImage.
81 * If handle points to a NinePatchImage the downcast produces valid
82 * handle. If not the returned handle is left uninitialized.
84 * @param[in] handle to An object
85 * @return handle to a NinePatchImage or an uninitialized handle
87 static NinePatchImage DownCast( BaseHandle handle );
92 * This is non-virtual since derived Handle types must not contain data or virtual methods.
97 * @brief This copy constructor is required for (smart) pointer semantics.
99 * @param [in] handle A reference to the copied handle
101 NinePatchImage(const NinePatchImage& handle);
104 * @brief This assignment operator is required for (smart) pointer semantics.
106 * @param [in] rhs A reference to the copied handle
107 * @return A reference to this
109 NinePatchImage& operator=(const NinePatchImage& rhs);
112 * @deprecated DALi 1.1.4 use GetStretchPixelsX and GetStretchPixelsY instead
114 * @brief Get the stretch borders
116 * @return The border in pixels from the left, top, right, and bottom of the image respectively.
118 Vector4 GetStretchBorders();
121 * @brief Retrieves the horizontal stretch pixel ranges in the cropped image space
125 * @return the horizontal stretch pixel ranges in the cropped image space
127 const StretchRanges& GetStretchPixelsX();
130 * @brief Retrieves the vertical stretch pixel ranges in the cropped image space
134 * @return the vertical stretch pixel ranges in the cropped image space
136 const StretchRanges& GetStretchPixelsY();
139 * @brief Get the child rectangle
141 * @return the position and size of the child rectangle
143 Rect<int> GetChildRectangle();
146 * @brief Creates a buffer image from the bitmap with the 1 pixel border cropped off.
148 * This does not change the internal bitmap.
150 * @return The cropped BufferImage
152 BufferImage CreateCroppedBufferImage();
155 * @brief Helper method to determine if the filename indicates that the image has a 9 patch or n patch border.
159 * @param [in] url The URL of the image file.
160 * @return true if it is a 9 patch or n patch image
162 static bool IsNinePatchUrl( const std::string& url );
164 public: // Not intended for application developers
166 explicit DALI_INTERNAL NinePatchImage(Internal::NinePatchImage*);
174 #endif // __DALI_NINE_PATCH_IMAGE_H__