blob: 7a97a2eddec1e4265a07ba6144363859c90ecf80 [file] [log] [blame]
* Copyright 2015 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkCodec_wbmp_DEFINED
#define SkCodec_wbmp_DEFINED
#include "include/codec/SkCodec.h"
#include "include/core/SkEncodedImageFormat.h"
#include "include/core/SkTypes.h"
#include "include/private/SkTemplates.h"
#include "src/codec/SkSwizzler.h"
#include <cstddef>
#include <cstdint>
#include <memory>
class SkSampler;
class SkStream;
struct SkEncodedInfo;
struct SkImageInfo;
class SkWbmpCodec final : public SkCodec {
static bool IsWbmp(const void*, size_t);
* Assumes IsWbmp was called and returned true
* Creates a wbmp codec
* Takes ownership of the stream
static std::unique_ptr<SkCodec> MakeFromStream(std::unique_ptr<SkStream>, Result*);
SkEncodedImageFormat onGetEncodedFormat() const override;
Result onGetPixels(const SkImageInfo&, void*, size_t,
const Options&, int*) override;
bool onRewind() override;
bool conversionSupported(const SkImageInfo& dst, bool srcIsOpaque,
bool needsXform) override;
// No need to Xform; all pixels are either black or white.
bool usesColorXform() const override { return false; }
SkSampler* getSampler(bool createIfNecessary) override {
SkASSERT(fSwizzler || !createIfNecessary);
return fSwizzler.get();
* Read a src row from the encoded stream
bool readRow(uint8_t* row);
SkWbmpCodec(SkEncodedInfo&&, std::unique_ptr<SkStream>);
const size_t fSrcRowBytes;
// Used for scanline decodes:
std::unique_ptr<SkSwizzler> fSwizzler;
SkAutoTMalloc<uint8_t> fSrcBuffer;
int onGetScanlines(void* dst, int count, size_t dstRowBytes) override;
bool onSkipScanlines(int count) override;
Result onStartScanlineDecode(const SkImageInfo& dstInfo,
const Options& options) override;
using INHERITED = SkCodec;
#endif // SkCodec_wbmp_DEFINED