dali-toolkit/internal/text/color-segmentation.cpp

   1 /*
   2  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // FILE HEADER
  19 #include <dali-toolkit/internal/text/color-segmentation.h>
  20
  21 // EXTERNAL INCLUDES
  22
  23 // INTERNAL INCLUDES
  24
  25 #include <iostream>
  26
  27 namespace Dali
  28 {
  29
  30 namespace Toolkit
  31 {
  32
  33 namespace Text
  34 {
  35
  36 void SetColorSegmentationInfo( const Vector<ColorRun>& characterColorRuns,
  37                                const Vector<GlyphIndex>& charactersToGlyph,
  38                                const Vector<Length>& glyphsPerCharacter,
  39                                Vector<ColorGlyphRun>& glyphColorRuns )
  40 {
  41   const VectorBase::SizeType numberOfColorRuns = characterColorRuns.Count();
  42
  43   if( 0u == numberOfColorRuns )
  44   {
  45     // Nothing to do.
  46     return;
  47   }
  48
  49   // Resize the color runs for the glyphs.
  50   glyphColorRuns.Resize( numberOfColorRuns );
  51
  52   // Get pointers to the buffers.
  53   ColorGlyphRun* glyphColorRunsBuffer = glyphColorRuns.Begin();
  54   const GlyphIndex* const charactersToGlyphBuffer = charactersToGlyph.Begin();
  55   const Length* const glyphsPerCharacterBuffer = glyphsPerCharacter.Begin();
  56
  57   // Convert from characters to glyphs.
  58   Length index = 0u;
  59   for( Vector<ColorRun>::ConstIterator it = characterColorRuns.Begin(),
  60          endIt = characterColorRuns.End();
  61        it != endIt;
  62        ++it, ++index )
  63   {
  64     const ColorRun& colorRun = *it;
  65
  66     if( 0u < colorRun.characterRun.numberOfCharacters )
  67     {
  68       // Get the next color glyph run.
  69       ColorGlyphRun& colorGlyphRun = *( glyphColorRunsBuffer + index );
  70       colorGlyphRun.color = colorRun.color;
  71
  72       // Convert the color run index from character to glyph.
  73       colorGlyphRun.glyphRun.glyphIndex = *( charactersToGlyphBuffer + colorRun.characterRun.characterIndex );
  74
  75       // Get the index to the last character of the run.
  76       const CharacterIndex lastIndex = colorRun.characterRun.characterIndex + colorRun.characterRun.numberOfCharacters - 1u;
  77
  78       // Calculate the number of glyphs.
  79       colorGlyphRun.glyphRun.numberOfGlyphs = *( charactersToGlyphBuffer + lastIndex ) + *( glyphsPerCharacterBuffer + lastIndex ) - colorGlyphRun.glyphRun.glyphIndex;
  80     }
  81   }
  82 }
  83
  84 } // namespace Text
  85
  86 } // namespace Toolkit
  87
  88 } // namespace Dali