godot/thirdparty/libwebp/src/enc/vp8li_enc.h

// Copyright 2012 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.
// -----------------------------------------------------------------------------
//
// Lossless encoder: internal header.
//
// Author: Vikas Arora ([email protected])

#ifndef WEBP_ENC_VP8LI_ENC_H_
#define WEBP_ENC_VP8LI_ENC_H_

#ifdef HAVE_CONFIG_H
#include "src/webp/config.h"
#endif
// Either WEBP_NEAR_LOSSLESS is defined as 0 in config.h when compiling to
// disable near-lossless, or it is enabled by default.
#ifndef WEBP_NEAR_LOSSLESS
#define WEBP_NEAR_LOSSLESS …
#endif

#include "src/enc/backward_references_enc.h"
#include "src/enc/histogram_enc.h"
#include "src/utils/bit_writer_utils.h"
#include "src/webp/encode.h"
#include "src/webp/format_constants.h"

#ifdef __cplusplus
extern "C" {
#endif

// maximum value of transform_bits_ in VP8LEncoder.
#define MAX_TRANSFORM_BITS …

VP8LEncoderARGBContent;

VP8LEncoder;

//------------------------------------------------------------------------------
// internal functions. Not public.

// Encodes the picture.
// Returns 0 if config or picture is NULL or picture doesn't have valid argb
// input.
int VP8LEncodeImage(const WebPConfig* const config,
                    const WebPPicture* const picture);

// Encodes the main image stream using the supplied bit writer.
// Returns false in case of error (stored in picture->error_code).
int VP8LEncodeStream(const WebPConfig* const config,
                     const WebPPicture* const picture, VP8LBitWriter* const bw);

#if (WEBP_NEAR_LOSSLESS == 1)
// in near_lossless.c
// Near lossless preprocessing in RGB color-space.
int VP8ApplyNearLossless(const WebPPicture* const picture, int quality,
                         uint32_t* const argb_dst);
#endif

//------------------------------------------------------------------------------
// Image transforms in predictor.c.

// pic and percent are for progress.
// Returns false in case of error (stored in pic->error_code).
int VP8LResidualImage(int width, int height, int bits, int low_effort,
                      uint32_t* const argb, uint32_t* const argb_scratch,
                      uint32_t* const image, int near_lossless, int exact,
                      int used_subtract_green, const WebPPicture* const pic,
                      int percent_range, int* const percent);

int VP8LColorSpaceTransform(int width, int height, int bits, int quality,
                            uint32_t* const argb, uint32_t* image,
                            const WebPPicture* const pic, int percent_range,
                            int* const percent);

//------------------------------------------------------------------------------

#ifdef __cplusplus
}    // extern "C"
#endif

#endif  // WEBP_ENC_VP8LI_ENC_H_