chromium/third_party/skia/src/codec/SkBmpStandardCodec.cpp

/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "src/codec/SkBmpStandardCodec.h"

#include "include/core/SkAlphaType.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkColorType.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkSize.h"
#include "include/core/SkStream.h"
#include "include/private/base/SkAlign.h"
#include "include/private/base/SkTemplates.h"
#include "src/base/SkMathPriv.h"
#include "src/codec/SkCodecPriv.h"

#include <algorithm>
#include <utility>

/*
 * Creates an instance of the decoder
 * Called only by NewFromStream
 */
SkBmpStandardCodec::SkBmpStandardCodec(SkEncodedInfo&& info, std::unique_ptr<SkStream> stream,
                                       uint16_t bitsPerPixel, uint32_t numColors,
                                       uint32_t bytesPerColor, uint32_t offset,
                                       SkCodec::SkScanlineOrder rowOrder,
                                       bool isOpaque, bool inIco)
    : … { … }

/*
 * Initiates the bitmap decode
 */
SkCodec::Result SkBmpStandardCodec::onGetPixels(const SkImageInfo& dstInfo,
                                        void* dst, size_t dstRowBytes,
                                        const Options& opts,
                                        int* rowsDecoded) { … }

/*
 * Process the color table for the bmp input
 */
 bool SkBmpStandardCodec::createColorTable(SkColorType dstColorType, SkAlphaType dstAlphaType) { … }

static SkEncodedInfo make_info(SkEncodedInfo::Color color,
                               SkEncodedInfo::Alpha alpha, int bitsPerPixel) { … }

SkEncodedInfo SkBmpStandardCodec::swizzlerInfo() const { … }

void SkBmpStandardCodec::initializeSwizzler(const SkImageInfo& dstInfo, const Options& opts) { … }

SkCodec::Result SkBmpStandardCodec::onPrepareToDecode(const SkImageInfo& dstInfo,
        const SkCodec::Options& options) { … }

/*
 * Performs the bitmap decoding for standard input format
 */
int SkBmpStandardCodec::decodeRows(const SkImageInfo& dstInfo, void* dst, size_t dstRowBytes,
        const Options& opts) { … }

void SkBmpStandardCodec::decodeIcoMask(SkStream* stream, const SkImageInfo& dstInfo,
        void* dst, size_t dstRowBytes) { … }