| 186 | } |
| 187 | |
| 188 | Channel PixelFormatRGB::getChannelAtPosition(int position) const |
| 189 | { |
| 190 | if (this->hasAlpha()) |
| 191 | { |
| 192 | if (position == 0 && this->alphaMode == AlphaMode::First) |
| 193 | return Channel::Alpha; |
| 194 | if (position == 3 && this->alphaMode == AlphaMode::Last) |
| 195 | return Channel::Alpha; |
| 196 | |
| 197 | if (this->alphaMode == AlphaMode::First) |
| 198 | position--; |
| 199 | } |
| 200 | |
| 201 | if (position == 0) |
| 202 | { |
| 203 | if (this->channelOrder == ChannelOrder::RGB || this->channelOrder == ChannelOrder::RBG) |
| 204 | return Channel::Red; |
| 205 | if (this->channelOrder == ChannelOrder::GRB || this->channelOrder == ChannelOrder::GBR) |
| 206 | return Channel::Green; |
| 207 | if (this->channelOrder == ChannelOrder::BGR || this->channelOrder == ChannelOrder::BRG) |
| 208 | return Channel::Blue; |
| 209 | } |
| 210 | else if (position == 1) |
| 211 | { |
| 212 | if (this->channelOrder == ChannelOrder::GRB || this->channelOrder == ChannelOrder::BRG) |
| 213 | return Channel::Red; |
| 214 | if (this->channelOrder == ChannelOrder::RGB || this->channelOrder == ChannelOrder::BGR) |
| 215 | return Channel::Green; |
| 216 | if (this->channelOrder == ChannelOrder::RBG || this->channelOrder == ChannelOrder::GBR) |
| 217 | return Channel::Blue; |
| 218 | } |
| 219 | else if (position == 2) |
| 220 | { |
| 221 | if (this->channelOrder == ChannelOrder::GBR || this->channelOrder == ChannelOrder::BGR) |
| 222 | return Channel::Red; |
| 223 | if (this->channelOrder == ChannelOrder::RBG || this->channelOrder == ChannelOrder::BRG) |
| 224 | return Channel::Green; |
| 225 | if (this->channelOrder == ChannelOrder::RGB || this->channelOrder == ChannelOrder::GRB) |
| 226 | return Channel::Blue; |
| 227 | } |
| 228 | |
| 229 | throw std::invalid_argument("Invalid argument for channel position"); |
| 230 | } |
| 231 | |
| 232 | } // namespace video::rgb |