56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
|
// 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)
|
||
|
|
|
||
|
|
#ifndef WEBP_DEC_ALPHAI_H_
|
||
|
|
#define WEBP_DEC_ALPHAI_H_
|
||
|
|
|
||
|
|
#include "./webpi.h"
|
||
|
|
#include "../utils/filters.h"
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
struct VP8LDecoder; // Defined in dec/vp8li.h.
|
||
|
|
|
||
|
|
typedef struct 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.
|
||
|
|
};
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// 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
|
||
|
|
|
||
|
|
#endif /* WEBP_DEC_ALPHAI_H_ */
|