// Copyright 2013 Google Inc. All Rights Reserved. // // Use of this source code is governed by a BSD-style license // that can be found in the COPYING file in the root of the source // tree. An additional intellectual property rights grant can be found // in the file PATENTS. All contributing project authors may // be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Alpha decoder: internal header. // // Author: Urvang (urvang@google.com)
typedefstruct ALPHDecoder ALPHDecoder; struct ALPHDecoder { int width; int height; int method;
WEBP_FILTER_TYPE filter; int pre_processing; struct VP8LDecoder* vp8l_dec;
VP8Io io; int use_8b_decode; // Although alpha channel requires only 1 byte per // pixel, sometimes VP8LDecoder may need to allocate // 4 bytes per pixel internally during decode.
uint8_t* output; const uint8_t* prev_line; // last output row (or NULL)
};
//------------------------------------------------------------------------------ // internal functions. Not public.
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