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 | |