core/fxge/fx_dib.h

// Copyright 2014 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_FX_DIB_H_
#define CORE_FXGE_FX_DIB_H_

#include <memory>
#include <vector>

#include "core/fxcrt/cfx_retain_ptr.h"
#include "core/fxcrt/fx_basic.h"
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/dib/cfx_dibsource.h"
#include "core/fxge/dib/cfx_scanlinecompositor.h"
#include "third_party/base/stl_util.h"

typedef uint32_t FX_ARGB;
typedef uint32_t FX_COLORREF;
typedef uint32_t FX_CMYK;
class CFX_ClipRgn;
class CStretchEngine;

#define FXSYS_RGB(r, g, b) ((r) | ((g) << 8) | ((b) << 16))
#define FXSYS_GetRValue(rgb) ((rgb)&0xff)
#define FXSYS_GetGValue(rgb) (((rgb) >> 8) & 0xff)
#define FXSYS_GetBValue(rgb) (((rgb) >> 16) & 0xff)
#define FX_CCOLOR(val) (255 - (val))
#define FXSYS_CMYK(c, m, y, k) (((c) << 24) | ((m) << 16) | ((y) << 8) | (k))
#define FXSYS_GetCValue(cmyk) ((uint8_t)((cmyk) >> 24) & 0xff)
#define FXSYS_GetMValue(cmyk) ((uint8_t)((cmyk) >> 16) & 0xff)
#define FXSYS_GetYValue(cmyk) ((uint8_t)((cmyk) >> 8) & 0xff)
#define FXSYS_GetKValue(cmyk) ((uint8_t)(cmyk)&0xff)
void CmykDecode(FX_CMYK cmyk, int& c, int& m, int& y, int& k);
inline FX_CMYK CmykEncode(int c, int m, int y, int k) {
  return (c << 24) | (m << 16) | (y << 8) | k;
}
void ArgbDecode(FX_ARGB argb, int& a, int& r, int& g, int& b);
void ArgbDecode(FX_ARGB argb, int& a, FX_COLORREF& rgb);
inline FX_ARGB ArgbEncode(int a, int r, int g, int b) {
  return (a << 24) | (r << 16) | (g << 8) | b;
}
FX_ARGB ArgbEncode(int a, FX_COLORREF rgb);
#define FXARGB_A(argb) ((uint8_t)((argb) >> 24))
#define FXARGB_R(argb) ((uint8_t)((argb) >> 16))
#define FXARGB_G(argb) ((uint8_t)((argb) >> 8))
#define FXARGB_B(argb) ((uint8_t)(argb))
#define FXARGB_MAKE(a, r, g, b) \
  (((uint32_t)(a) << 24) | ((r) << 16) | ((g) << 8) | (b))
#define FXARGB_MUL_ALPHA(argb, alpha) \
  (((((argb) >> 24) * (alpha) / 255) << 24) | ((argb)&0xffffff))
#define FXRGB2GRAY(r, g, b) (((b)*11 + (g)*59 + (r)*30) / 100)
#define FXCMYK2GRAY(c, m, y, k)                                       \
  (((255 - (c)) * (255 - (k)) * 30 + (255 - (m)) * (255 - (k)) * 59 + \
    (255 - (y)) * (255 - (k)) * 11) /                                 \
   25500)
#define FXDIB_ALPHA_MERGE(backdrop, source, source_alpha) \
  (((backdrop) * (255 - (source_alpha)) + (source) * (source_alpha)) / 255)
#define FXDIB_ALPHA_UNION(dest, src) ((dest) + (src) - (dest) * (src) / 255)
#define FXCMYK_GETDIB(p)                                    \
  ((((uint8_t*)(p))[0] << 24 | (((uint8_t*)(p))[1] << 16) | \
    (((uint8_t*)(p))[2] << 8) | ((uint8_t*)(p))[3]))
#define FXCMYK_SETDIB(p, cmyk)  ((uint8_t*)(p))[0] = (uint8_t)((cmyk) >> 24), \
        ((uint8_t*)(p))[1] = (uint8_t)((cmyk) >> 16), \
                              ((uint8_t*)(p))[2] = (uint8_t)((cmyk) >> 8), \
                                      ((uint8_t*)(p))[3] = (uint8_t)(cmyk))
#define FXARGB_GETDIB(p)                              \
  ((((uint8_t*)(p))[0]) | (((uint8_t*)(p))[1] << 8) | \
   (((uint8_t*)(p))[2] << 16) | (((uint8_t*)(p))[3] << 24))
#define FXARGB_SETDIB(p, argb)                  \
  ((uint8_t*)(p))[0] = (uint8_t)(argb),         \
  ((uint8_t*)(p))[1] = (uint8_t)((argb) >> 8),  \
  ((uint8_t*)(p))[2] = (uint8_t)((argb) >> 16), \
  ((uint8_t*)(p))[3] = (uint8_t)((argb) >> 24)
#define FXARGB_COPY(dest, src)                      \
  *(uint8_t*)(dest) = *(uint8_t*)(src),             \
  *((uint8_t*)(dest) + 1) = *((uint8_t*)(src) + 1), \
  *((uint8_t*)(dest) + 2) = *((uint8_t*)(src) + 2), \
  *((uint8_t*)(dest) + 3) = *((uint8_t*)(src) + 3)
#define FXCMYK_COPY(dest, src)                      \
  *(uint8_t*)(dest) = *(uint8_t*)(src),             \
  *((uint8_t*)(dest) + 1) = *((uint8_t*)(src) + 1), \
  *((uint8_t*)(dest) + 2) = *((uint8_t*)(src) + 2), \
  *((uint8_t*)(dest) + 3) = *((uint8_t*)(src) + 3)
#define FXARGB_SETRGBORDERDIB(p, argb)          \
  ((uint8_t*)(p))[3] = (uint8_t)(argb >> 24),   \
  ((uint8_t*)(p))[0] = (uint8_t)((argb) >> 16), \
  ((uint8_t*)(p))[1] = (uint8_t)((argb) >> 8),  \
  ((uint8_t*)(p))[2] = (uint8_t)(argb)
#define FXARGB_GETRGBORDERDIB(p)                     \
  (((uint8_t*)(p))[2]) | (((uint8_t*)(p))[1] << 8) | \
      (((uint8_t*)(p))[0] << 16) | (((uint8_t*)(p))[3] << 24)
#define FXARGB_RGBORDERCOPY(dest, src)                                   \
  *((uint8_t*)(dest) + 3) = *((uint8_t*)(src) + 3),                      \
                       *(uint8_t*)(dest) = *((uint8_t*)(src) + 2),       \
                       *((uint8_t*)(dest) + 1) = *((uint8_t*)(src) + 1), \
                       *((uint8_t*)(dest) + 2) = *((uint8_t*)(src))
#define FXARGB_TODIB(argb) (argb)
#define FXCMYK_TODIB(cmyk)                                    \
  ((uint8_t)((cmyk) >> 24) | ((uint8_t)((cmyk) >> 16)) << 8 | \
   ((uint8_t)((cmyk) >> 8)) << 16 | ((uint8_t)(cmyk) << 24))
#define FXARGB_TOBGRORDERDIB(argb)                       \
  ((uint8_t)(argb >> 16) | ((uint8_t)(argb >> 8)) << 8 | \
   ((uint8_t)(argb)) << 16 | ((uint8_t)(argb >> 24) << 24))
#define FXGETFLAG_COLORTYPE(flag) (uint8_t)((flag) >> 8)
#define FXGETFLAG_ALPHA_FILL(flag) (uint8_t)(flag)

bool ConvertBuffer(FXDIB_Format dest_format,
                   uint8_t* dest_buf,
                   int dest_pitch,
                   int width,
                   int height,
                   const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
                   int src_left,
                   int src_top,
                   std::unique_ptr<uint32_t, FxFreeDeleter>* pal);

class IFX_ScanlineComposer {
 public:
  virtual ~IFX_ScanlineComposer() {}

  virtual void ComposeScanline(int line,
                               const uint8_t* scanline,
                               const uint8_t* scan_extra_alpha = nullptr) = 0;

  virtual bool SetInfo(int width,
                       int height,
                       FXDIB_Format src_format,
                       uint32_t* pSrcPalette) = 0;
};

#endif  // CORE_FXGE_FX_DIB_H_