godot/thirdparty/libwebp/src/dec/buffer_dec.c

// Copyright 2011 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.
// -----------------------------------------------------------------------------
//
// Everything about WebPDecBuffer
//
// Author: Skal ([email protected])

#include <stdlib.h>

#include "src/dec/vp8i_dec.h"
#include "src/dec/webpi_dec.h"
#include "src/utils/utils.h"

//------------------------------------------------------------------------------
// WebPDecBuffer

// Number of bytes per pixel for the different color-spaces.
static const uint8_t kModeBpp[MODE_LAST] = …;

// Check that webp_csp_mode is within the bounds of WEBP_CSP_MODE.
// Convert to an integer to handle both the unsigned/signed enum cases
// without the need for casting to remove type limit warnings.
static int IsValidColorspace(int webp_csp_mode) { … }

// strictly speaking, the very last (or first, if flipped) row
// doesn't require padding.
#define MIN_BUFFER_SIZE …

static VP8StatusCode CheckDecBuffer(const WebPDecBuffer* const buffer) { … }
#undef MIN_BUFFER_SIZE

static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) { … }

VP8StatusCode WebPFlipBuffer(WebPDecBuffer* const buffer) { … }

VP8StatusCode WebPAllocateDecBuffer(int width, int height,
                                    const WebPDecoderOptions* const options,
                                    WebPDecBuffer* const buffer) { … }

//------------------------------------------------------------------------------
// constructors / destructors

int WebPInitDecBufferInternal(WebPDecBuffer* buffer, int version) { … }

void WebPFreeDecBuffer(WebPDecBuffer* buffer) { … }

void WebPCopyDecBuffer(const WebPDecBuffer* const src,
                       WebPDecBuffer* const dst) { … }

// Copy and transfer ownership from src to dst (beware of parameter order!)
void WebPGrabDecBuffer(WebPDecBuffer* const src, WebPDecBuffer* const dst) { … }

VP8StatusCode WebPCopyDecBufferPixels(const WebPDecBuffer* const src_buf,
                                      WebPDecBuffer* const dst_buf) { … }

int WebPAvoidSlowMemory(const WebPDecBuffer* const output,
                        const WebPBitstreamFeatures* const features) { … }

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