1 #ifndef DALI_INTERNAL_ADAPTOR_PIXEL_MANIPULATION_H
2 #define DALI_INTERNAL_ADAPTOR_PIXEL_MANIPULATION_H
5 * Copyright (c) 2020 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.
20 #include <dali/public-api/images/pixel.h>
40 MAX_NUMBER_OF_CHANNELS
44 * Return true if the channel exists in the pixel format
45 * @param[in] pixelFormat The pixelFormat
46 * @param[in] channel The channel to test for
47 * @return true if the channel exists
49 bool HasChannel( Dali::Pixel::Format pixelFormat, Channel channel );
53 * Read a colour channel from the pixel with the given pixel format.
54 * Returns zero if the format does not support the channel
55 * @param[in] pixelData Location of the pixel
56 * @param[in] pixelFormat The format of the pixel
57 * @param[in] channel The channel to read
58 * @return the channel value
60 unsigned int ReadChannel( unsigned char* pixelData,
61 Dali::Pixel::Format pixelFormat,
65 * Write a colour channel to the pixel with the given pixel format.
66 * @param[in] pixelData Location of the pixel
67 * @param[in] pixelFormat The format of the pixel
68 * @param[in] channel The channel to write
69 * @param[in] channelValue the value to write to the channel
71 void WriteChannel( unsigned char* pixelData,
72 Dali::Pixel::Format pixelFormat,
74 unsigned int channelValue );
77 * Convert the colors in the source pixel from their natural format to RGBA8888.
78 * @param[in] srcBuffer The source buffer to read from
79 * @param[in] srcOffset The offset of the pixel to convert
80 * @param[in] srcFormat The pixel format of the source pixel
81 * @param[in] destBuffer The destination buffer to write to
82 * @param[in] destOffset The offset of the pixel to write
84 void ConvertColorChannelsToRGBA8888(
85 unsigned char* srcBuffer, int srcOffset, Dali::Pixel::Format srcFormat,
86 unsigned char* destBuffer, int destOffset );
89 * Convert the alpha in the source pixel to A8.
90 * @param[in] srcBuffer The source buffer to read from
91 * @param[in] srcOffset The offset of the pixel to convert
92 * @param[in] srcFormat The pixel format of the source pixel
93 * @return the alpha value in the range 0-255
95 int ConvertAlphaChannelToA8( unsigned char* srcPixel, int srcOffset, Dali::Pixel::Format srcFormat );
103 #endif // DALI_INTERNAL_ADAPTOR_PIXEL_MANIPULATION_H