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// Copyright 2017 PDFium Authors. All rights reserved.
// 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. http://www.foxitsoftware.com
#ifndef CORE_FXGE_DIB_CFX_DIBSOURCE_H_
#define CORE_FXGE_DIB_CFX_DIBSOURCE_H_
#include <memory>
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/fx_memory.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxge/fx_dib.h"
enum FXDIB_Channel {
FXDIB_Red = 1,
FXDIB_Green,
FXDIB_Blue,
FXDIB_Cyan,
FXDIB_Magenta,
FXDIB_Yellow,
FXDIB_Black,
FXDIB_Alpha
};
class CFX_ClipRgn;
class CFX_DIBitmap;
class PauseIndicatorIface;
class CFX_DIBSource : public Retainable {
public:
~CFX_DIBSource() override;
virtual uint8_t* GetBuffer() const;
virtual const uint8_t* GetScanline(int line) const = 0;
virtual bool SkipToScanline(int line, PauseIndicatorIface* pPause) const;
virtual void DownSampleScanline(int line,
uint8_t* dest_scan,
int dest_bpp,
int dest_width,
bool bFlipX,
int clip_left,
int clip_width) const = 0;
uint8_t* GetWritableScanline(int line) {
return const_cast<uint8_t*>(GetScanline(line));
}
int GetWidth() const { return m_Width; }
int GetHeight() const { return m_Height; }
FXDIB_Format GetFormat() const {
return static_cast<FXDIB_Format>(m_AlphaFlag * 0x100 + m_bpp);
}
uint32_t GetPitch() const { return m_Pitch; }
uint32_t* GetPalette() const { return m_pPalette.get(); }
int GetBPP() const { return m_bpp; }
// TODO(thestig): Investigate this. Given the possible values of FXDIB_Format,
// it feels as though this should be implemented as !!(m_AlphaFlag & 1) and
// IsOpaqueImage() below should never be able to return true.
bool IsAlphaMask() const { return m_AlphaFlag == 1; }
bool HasAlpha() const { return !!(m_AlphaFlag & 2); }
bool IsOpaqueImage() const { return !(m_AlphaFlag & 3); }
bool IsCmykImage() const { return !!(m_AlphaFlag & 4); }
int GetPaletteSize() const {
return IsAlphaMask() ? 0 : (m_bpp == 1 ? 2 : (m_bpp == 8 ? 256 : 0));
}
uint32_t GetPaletteArgb(int index) const;
void SetPaletteArgb(int index, uint32_t color);
// Copies into internally-owned palette.
void SetPalette(const uint32_t* pSrcPal);
RetainPtr<CFX_DIBitmap> Clone(const FX_RECT* pClip) const;
RetainPtr<CFX_DIBitmap> CloneConvert(FXDIB_Format format);
RetainPtr<CFX_DIBitmap> StretchTo(int dest_width,
int dest_height,
uint32_t flags,
const FX_RECT* pClip);
RetainPtr<CFX_DIBitmap> TransformTo(const CFX_Matrix* pMatrix,
int* left,
int* top);
RetainPtr<CFX_DIBitmap> SwapXY(bool bXFlip, bool bYFlip) const;
RetainPtr<CFX_DIBitmap> FlipImage(bool bXFlip, bool bYFlip) const;
RetainPtr<CFX_DIBitmap> CloneAlphaMask() const;
// Copies into internally-owned mask.
bool SetAlphaMask(const RetainPtr<CFX_DIBSource>& pAlphaMask,
const FX_RECT* pClip);
void GetOverlapRect(int& dest_left,
int& dest_top,
int& width,
int& height,
int src_width,
int src_height,
int& src_left,
int& src_top,
const CFX_ClipRgn* pClipRgn);
#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
void DebugVerifyBitmapIsPreMultiplied(void* buffer) const;
#endif
RetainPtr<CFX_DIBitmap> m_pAlphaMask;
protected:
CFX_DIBSource();
static bool ConvertBuffer(FXDIB_Format dest_format,
uint8_t* dest_buf,
int dest_pitch,
int width,
int height,
const RetainPtr<CFX_DIBSource>& pSrcBitmap,
int src_left,
int src_top,
std::unique_ptr<uint32_t, FxFreeDeleter>* pal);
void BuildPalette();
bool BuildAlphaMask();
int FindPalette(uint32_t color) const;
void GetPalette(uint32_t* pal, int alpha) const;
int m_Width;
int m_Height;
int m_bpp;
uint32_t m_AlphaFlag;
uint32_t m_Pitch;
// TODO(weili): Use std::vector for this.
std::unique_ptr<uint32_t, FxFreeDeleter> m_pPalette;
};
#endif // CORE_FXGE_DIB_CFX_DIBSOURCE_H_
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