fx_dib.cpp

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// Copyright 2014 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. http://www.foxitsoftware.com
 
#include "core/fxge/dib/fx_dib.h"
 
#include <tuple>
#include <utility>
 
#include "build/build_config.h"
 
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#endif
 
#if BUILDFLAG(IS_WIN)
static_assert(sizeof(FX_COLORREF) == sizeof(COLORREF),
              "FX_COLORREF vs. COLORREF mismatch");
#endif
 
FXDIB_Format MakeRGBFormat(int bpp) {
  switch (bpp) {
    case 1:
      return FXDIB_Format::k1bppRgb;
    case 8:
      return FXDIB_Format::k8bppRgb;
    case 24:
      return FXDIB_Format::kRgb;
    case 32:
      return FXDIB_Format::kRgb32;
    default:
      return FXDIB_Format::kInvalid;
  }
}
 
FXDIB_ResampleOptions::FXDIB_ResampleOptions() = default;
 
bool FXDIB_ResampleOptions::HasAnyOptions() const {
  return bInterpolateBilinear || bHalftone || bNoSmoothing || bLossy;
}
 
std::tuple<int, int, int, int> ArgbDecode(FX_ARGB argb) {
  return std::make_tuple(FXARGB_A(argb), FXARGB_R(argb), FXARGB_G(argb),
                         FXARGB_B(argb));
}
 
std::pair<int, FX_COLORREF> ArgbToAlphaAndColorRef(FX_ARGB argb) {
  return {FXARGB_A(argb), ArgbToColorRef(argb)};
}
 
FX_COLORREF ArgbToColorRef(FX_ARGB argb) {
  return FXSYS_BGR(FXARGB_B(argb), FXARGB_G(argb), FXARGB_R(argb));
}
 
FX_ARGB AlphaAndColorRefToArgb(int a, FX_COLORREF colorref) {
  return ArgbEncode(a, FXSYS_GetRValue(colorref), FXSYS_GetGValue(colorref),
                    FXSYS_GetBValue(colorref));
}