1 // Copyright 2016 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 ETC_Decoder 16 { 17 public: 18 enum InputType 19 { 20 ETC_R_SIGNED, 21 ETC_R_UNSIGNED, 22 ETC_RG_SIGNED, 23 ETC_RG_UNSIGNED, 24 ETC_RGB, 25 ETC_RGB_PUNCHTHROUGH_ALPHA, 26 ETC_RGBA 27 }; 28 29 /// ETC_Decoder::Decode - Decodes 1 to 4 channel images to 8 bit output 30 /// @param src Pointer to ETC2 encoded image 31 /// @param dst Pointer to BGRA, 8 bit output 32 /// @param w src image width 33 /// @param h src image height 34 /// @param dstW dst image width 35 /// @param dstH dst image height 36 /// @param dstPitch dst image pitch (bytes per row) 37 /// @param dstBpp dst image bytes per pixel 38 /// @param inputType src's format 39 /// @return true if the decoding was performed 40 static bool Decode(const unsigned char* src, unsigned char *dst, int w, int h, int dstW, int dstH, int dstPitch, int dstBpp, InputType inputType); 41 }; 42
