1 // Copyright 2019 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 class BC_Decoder 16 { 17 public: 18 /// BCn_Decoder::Decode - Decodes 1 to 4 channel images to 8 bit output 19 /// @param src Pointer to BCn encoded image 20 /// @param dst Pointer to decoded output image 21 /// @param w image width 22 /// @param h image height 23 /// @param dstPitch dst image pitch (bytes per row) 24 /// @param dstBpp dst image bytes per pixel 25 /// @param n n in BCn format 26 /// @param isNoAlphaU BC1: true if RGB, BC2/BC3: unused, BC4/BC5/BC6H: true if unsigned 27 /// @return true if the decoding was performed 28 29 static bool Decode(const unsigned char *src, unsigned char *dst, int w, int h, int dstPitch, int dstBpp, int n, bool isNoAlphaU); 30 }; 31