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// 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 (
#include "./webpi.h"
#include "../utils/filters.h"
#ifdef __cplusplus
extern "C" {
struct VP8LDecoder; // Defined in dec/vp8li.h.
typedef struct ALPHDecoder ALPHDecoder;
struct ALPHDecoder {
int width_;
int height_;
int method_;
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.
// internal functions. Not public.
// Allocates a new alpha decoder instance.
ALPHDecoder* ALPHNew(void);
// Clears and deallocates an alpha decoder instance.
void ALPHDelete(ALPHDecoder* const dec);
#ifdef __cplusplus
} // extern "C"
#endif /* WEBP_DEC_ALPHAI_H_ */