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// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc.
#include <memory>
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxge/dib/fx_dib.h"
#include "core/fxge/dib/scanlinecomposer_iface.h"
#include "third_party/base/span.h"
class CFX_DIBBase;
class CStretchEngine;
class PauseIndicatorIface;
class CFX_ImageStretcher {
CFX_ImageStretcher(ScanlineComposerIface* pDest,
const RetainPtr<const CFX_DIBBase>& pSource,
int dest_width,
int dest_height,
const FX_RECT& bitmap_rect,
const FXDIB_ResampleOptions& options);
// Builds a new palette with a size of `CFX_DIBBase::kPaletteSize` from the
// existing palette in `source`. Note: The caller must make sure that the
// parameters meet the following conditions:
// source - The format must be `FXDIB_Format::k1bppRgb` and it must
// have a palette.
// palette_span - The size must be `CFX_DIBBase::kPaletteSize` to be able
// to hold the new palette.
static void BuildPaletteFrom1BppSource(
const RetainPtr<const CFX_DIBBase>& source,
pdfium::span<FX_ARGB> palette_span);
bool Start();
bool Continue(PauseIndicatorIface* pPause);
RetainPtr<const CFX_DIBBase> source();
bool StartStretch();
bool ContinueStretch(PauseIndicatorIface* pPause);
UnownedPtr<ScanlineComposerIface> const m_pDest;
RetainPtr<const CFX_DIBBase> const m_pSource;
std::unique_ptr<CStretchEngine> m_pStretchEngine;
const FXDIB_ResampleOptions m_ResampleOptions;
const int m_DestWidth;
const int m_DestHeight;
const FX_RECT m_ClipRect;
const FXDIB_Format m_DestFormat;