1 #ifndef DALI_INTERNAL_ADAPTOR_PIXEL_MANIPULATION_H
2 #define DALI_INTERNAL_ADAPTOR_PIXEL_MANIPULATION_H
5 * Copyright (c) 2017 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>
38 MAX_NUMBER_OF_CHANNELS
42 * Return true if the channel exists in the pixel format
43 * @param[in] pixelFormat The pixelFormat
44 * @param[in] channel The channel to test for
45 * @return true if the channel exists
47 bool HasChannel( Dali::Pixel::Format pixelFormat, Channel channel );
51 * Read a colour channel from the pixel with the given pixel format.
52 * Returns zero if the format does not support the channel
53 * @param[in] pixelData Location of the pixel
54 * @param[in] pixelFormat The format of the pixel
55 * @param[in] channel The channel to read
56 * @return the channel value
58 unsigned int ReadChannel( unsigned char* pixelData,
59 Dali::Pixel::Format pixelFormat,
63 * Write a colour channel to the pixel with the given pixel format.
64 * @param[in] pixelData Location of the pixel
65 * @param[in] pixelFormat The format of the pixel
66 * @param[in] channel The channel to write
67 * @param[in] channelValue the value to write to the channel
69 void WriteChannel( unsigned char* pixelData,
70 Dali::Pixel::Format pixelFormat,
72 unsigned int channelValue );
75 * Convert the colors in the source pixel from their natural format to RGBA8888.
76 * @param[in] srcBuffer The source buffer to read from
77 * @param[in] srcOffset The offset of the pixel to convert
78 * @param[in] srcFormat The pixel format of the source pixel
79 * @param[in] destBuffer The destination buffer to write to
80 * @param[in] destOffset The offset of the pixel to write
82 void ConvertColorChannelsToRGBA8888(
83 unsigned char* srcBuffer, int srcOffset, Dali::Pixel::Format srcFormat,
84 unsigned char* destBuffer, int destOffset );
87 * Convert the alpha in the source pixel to A8.
88 * @param[in] srcBuffer The source buffer to read from
89 * @param[in] srcOffset The offset of the pixel to convert
90 * @param[in] srcFormat The pixel format of the source pixel
91 * @return the alpha value in the range 0-255
93 int ConvertAlphaChannelToA8( unsigned char* srcPixel, int srcOffset, Dali::Pixel::Format srcFormat );
101 #endif // DALI_INTERNAL_ADAPTOR_PIXEL_MANIPULATION_H