skia_utils_base.cc

// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stdint.h>

#include "skia/ext/skia_utils_base.h"

namespace skia {

bool ReadSkString(base::PickleIterator* iter, SkString* str) {
  int reply_length;
  const char* reply_text;

  if (!iter->ReadData(&reply_text, &reply_length))
    return false;

  if (str)
    str->set(reply_text, reply_length);
  return true;
}

bool ReadSkFontIdentity(base::PickleIterator* iter,
                        SkFontConfigInterface::FontIdentity* identity) {
  uint32_t reply_id;
  uint32_t reply_ttcIndex;
  int reply_length;
  const char* reply_text;

  if (!iter->ReadUInt32(&reply_id) ||
      !iter->ReadUInt32(&reply_ttcIndex) ||
      !iter->ReadData(&reply_text, &reply_length))
    return false;

  if (identity) {
    identity->fID = reply_id;
    identity->fTTCIndex = reply_ttcIndex;
    identity->fString.set(reply_text, reply_length);
  }
  return true;
}

bool WriteSkString(base::Pickle* pickle, const SkString& str) {
  return pickle->WriteData(str.c_str(), str.size());
}

bool WriteSkFontIdentity(base::Pickle* pickle,
                         const SkFontConfigInterface::FontIdentity& identity) {
  return pickle->WriteUInt32(identity.fID) &&
         pickle->WriteUInt32(identity.fTTCIndex) &&
         WriteSkString(pickle, identity.fString);
}

SkPixelGeometry ComputeDefaultPixelGeometry() {
    SkFontHost::LCDOrder order = SkFontHost::GetSubpixelOrder();
    if (SkFontHost::kNONE_LCDOrder == order) {
        return kUnknown_SkPixelGeometry;
    } else {
        // Bit0 is RGB(0), BGR(1)
        // Bit1 is H(0), V(1)
        const SkPixelGeometry gGeo[] = {
            kRGB_H_SkPixelGeometry,
            kBGR_H_SkPixelGeometry,
            kRGB_V_SkPixelGeometry,
            kBGR_V_SkPixelGeometry,
        };
        int index = 0;
        if (SkFontHost::kBGR_LCDOrder == order) {
            index |= 1;
        }
        if (SkFontHost::kVertical_LCDOrientation == SkFontHost::GetSubpixelOrientation()){
            index |= 2;
        }
        return gGeo[index];
    }
}

}  // namespace skia