skia/ext/skia_utils_base.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "skia/ext/skia_utils_base.h"
   6
   7 namespace skia {
   8
   9 bool ReadSkString(base::PickleIterator* iter, SkString* str) {
  10   int reply_length;
  11   const char* reply_text;
  12
  13   if (!iter->ReadData(&reply_text, &reply_length))
  14     return false;
  15
  16   if (str)
  17     str->set(reply_text, reply_length);
  18   return true;
  19 }
  20
  21 bool ReadSkFontIdentity(base::PickleIterator* iter,
  22                         SkFontConfigInterface::FontIdentity* identity) {
  23   uint32_t reply_id;
  24   uint32_t reply_ttcIndex;
  25   int reply_length;
  26   const char* reply_text;
  27
  28   if (!iter->ReadUInt32(&reply_id) ||
  29       !iter->ReadUInt32(&reply_ttcIndex) ||
  30       !iter->ReadData(&reply_text, &reply_length))
  31     return false;
  32
  33   if (identity) {
  34     identity->fID = reply_id;
  35     identity->fTTCIndex = reply_ttcIndex;
  36     identity->fString.set(reply_text, reply_length);
  37   }
  38   return true;
  39 }
  40
  41 bool WriteSkString(base::Pickle* pickle, const SkString& str) {
  42   return pickle->WriteData(str.c_str(), str.size());
  43 }
  44
  45 bool WriteSkFontIdentity(base::Pickle* pickle,
  46                          const SkFontConfigInterface::FontIdentity& identity) {
  47   return pickle->WriteUInt32(identity.fID) &&
  48          pickle->WriteUInt32(identity.fTTCIndex) &&
  49          WriteSkString(pickle, identity.fString);
  50 }
  51
  52 SkPixelGeometry ComputeDefaultPixelGeometry() {
  53     SkFontHost::LCDOrder order = SkFontHost::GetSubpixelOrder();
  54     if (SkFontHost::kNONE_LCDOrder == order) {
  55         return kUnknown_SkPixelGeometry;
  56     } else {
  57         // Bit0 is RGB(0), BGR(1)
  58         // Bit1 is H(0), V(1)
  59         const SkPixelGeometry gGeo[] = {
  60             kRGB_H_SkPixelGeometry,
  61             kBGR_H_SkPixelGeometry,
  62             kRGB_V_SkPixelGeometry,
  63             kBGR_V_SkPixelGeometry,
  64         };
  65         int index = 0;
  66         if (SkFontHost::kBGR_LCDOrder == order) {
  67             index |= 1;
  68         }
  69         if (SkFontHost::kVertical_LCDOrientation == SkFontHost::GetSubpixelOrientation()){
  70             index |= 2;
  71         }
  72         return gGeo[index];
  73     }
  74 }
  75
  76 }  // namespace skia
  77