dali-toolkit/internal/text/rendering/atlas/text-atlas-renderer.cpp

   1 /*
   2  * Copyright (c) 2022 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 // CLASS HEADER
  19 #include <dali-toolkit/internal/text/rendering/atlas/text-atlas-renderer.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/devel-api/text-abstraction/font-client.h>
  23 #include <dali/integration-api/debug.h>
  24 #include <dali/public-api/animation/constraints.h>
  25 #include <dali/public-api/math/math-utils.h>
  26 #include <dali/public-api/rendering/geometry.h>
  27 #include <dali/public-api/rendering/renderer.h>
  28 #include <map>
  29
  30 // INTERNAL INCLUDES
  31 #include <dali-toolkit/devel-api/controls/control-depth-index-ranges.h>
  32 #include <dali-toolkit/internal/graphics/builtin-shader-extern-gen.h>
  33 #include <dali-toolkit/internal/text/glyph-metrics-helper.h>
  34 #include <dali-toolkit/internal/text/glyph-run.h>
  35 #include <dali-toolkit/internal/text/rendering/atlas/atlas-glyph-manager.h>
  36 #include <dali-toolkit/internal/text/rendering/atlas/atlas-mesh-factory.h>
  37 #include <dali-toolkit/internal/text/rendering/styles/strikethrough-helper-functions.h>
  38 #include <dali-toolkit/internal/text/rendering/styles/underline-helper-functions.h>
  39 #include <dali-toolkit/internal/text/text-view.h>
  40
  41 using namespace Dali;
  42 using namespace Dali::Toolkit;
  43 using namespace Dali::Toolkit::Text;
  44
  45 namespace
  46 {
  47 #if defined(DEBUG_ENABLED)
  48 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, true, "LOG_TEXT_RENDERING");
  49 #endif
  50
  51 const float    ZERO(0.0f);
  52 const float    HALF(0.5f);
  53 const float    ONE(1.0f);
  54 const float    ONE_AND_A_HALF(1.5f);
  55 const uint32_t DOUBLE_PIXEL_PADDING = 4u; //Padding will be added twice to Atlas
  56 const uint16_t NO_OUTLINE           = 0u;
  57 } // namespace
  58
  59 struct AtlasRenderer::Impl
  60 {
  61   enum Style
  62   {
  63     STYLE_NORMAL,
  64     STYLE_DROP_SHADOW
  65   };
  66
  67   struct MeshRecord
  68   {
  69     MeshRecord()
  70     : mAtlasId(0u)
  71     {
  72     }
  73
  74     uint32_t             mAtlasId;
  75     AtlasManager::Mesh2D mMesh;
  76   };
  77
  78   /**
  79    * brief Struct used to generate the underline/striketthrough mesh.
  80    * There is one Extent per line of text.
  81    */
  82   struct Extent
  83   {
  84     Extent()
  85     : mBaseLine(0.0f),
  86       mLeft(0.0f),
  87       mRight(0.0f),
  88       mUnderlinePosition(0.0f),
  89       mLineThickness(0.0f),
  90       mMeshRecordIndex(0u),
  91       mUnderlineChunkId(0u),
  92       mStrikethroughPosition(0.0f),
  93       mStrikethroughChunkId(0u)
  94     {
  95     }
  96
  97     float    mBaseLine;
  98     float    mLeft;
  99     float    mRight;
 100     float    mUnderlinePosition;
 101     float    mLineThickness;
 102     uint32_t mMeshRecordIndex;
 103     uint32_t mUnderlineChunkId;
 104     float    mStrikethroughPosition;
 105     uint32_t mStrikethroughChunkId;
 106   };
 107
 108   struct MaxBlockSize
 109   {
 110     MaxBlockSize()
 111     : mFontId(0),
 112       mNeededBlockWidth(0),
 113       mNeededBlockHeight(0)
 114     {
 115     }
 116
 117     FontId   mFontId;
 118     uint32_t mNeededBlockWidth;
 119     uint32_t mNeededBlockHeight;
 120   };
 121
 122   struct CheckEntry
 123   {
 124     CheckEntry()
 125     : mFontId(0),
 126       mIndex(0)
 127     {
 128     }
 129
 130     FontId           mFontId;
 131     Text::GlyphIndex mIndex;
 132   };
 133
 134   struct TextCacheEntry
 135   {
 136     TextCacheEntry()
 137     : mFontId{0u},
 138       mIndex{0u},
 139       mImageId{0u},
 140       mOutlineWidth{0u},
 141       isItalic{false},
 142       isBold{false}
 143     {
 144     }
 145
 146     FontId           mFontId;
 147     Text::GlyphIndex mIndex;
 148     uint32_t         mImageId;
 149     uint16_t         mOutlineWidth;
 150     bool             isItalic : 1;
 151     bool             isBold : 1;
 152   };
 153
 154   Impl()
 155   : mDepth(0)
 156   {
 157     mGlyphManager = AtlasGlyphManager::Get();
 158     mFontClient   = TextAbstraction::FontClient::Get();
 159
 160     mQuadVertexFormat["aPosition"] = Property::VECTOR2;
 161     mQuadVertexFormat["aTexCoord"] = Property::VECTOR2;
 162     mQuadVertexFormat["aColor"]    = Property::VECTOR4;
 163   }
 164
 165   void CacheGlyph(const GlyphInfo& glyph, FontId lastFontId, const AtlasGlyphManager::GlyphStyle& style, AtlasManager::AtlasSlot& slot)
 166   {
 167     const Size& defaultTextAtlasSize = mFontClient.GetDefaultTextAtlasSize(); //Retrieve default size of text-atlas-block from font-client.
 168     const Size& maximumTextAtlasSize = mFontClient.GetMaximumTextAtlasSize(); //Retrieve maximum size of text-atlas-block from font-client.
 169
 170     const bool glyphNotCached = !mGlyphManager.IsCached(glyph.fontId, glyph.index, style, slot); // Check FontGlyphRecord vector for entry with glyph index and fontId
 171
 172     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "AddGlyphs fontID[%u] glyphIndex[%u] [%s]\n", glyph.fontId, glyph.index, (glyphNotCached) ? "not cached" : "cached");
 173
 174     if(glyphNotCached)
 175     {
 176       MaxBlockSize& blockSize = mBlockSizes[0u];
 177
 178       if(lastFontId != glyph.fontId)
 179       {
 180         uint32_t index = 0u;
 181         // Looks through all stored block sizes until finds the one which mataches required glyph font it.  Ensures new atlas block size will match existing for same font id.
 182         // CalculateBlocksSize() above ensures a block size entry exists.
 183         for(std::vector<MaxBlockSize>::const_iterator it    = mBlockSizes.begin(),
 184                                                       endIt = mBlockSizes.end();
 185             it != endIt;
 186             ++it, ++index)
 187         {
 188           const MaxBlockSize& blockSizeEntry = *it;
 189           if(blockSizeEntry.mFontId == glyph.fontId)
 190           {
 191             blockSize = mBlockSizes[index];
 192           }
 193         }
 194       }
 195
 196       // Create a new image for the glyph
 197       PixelData bitmap;
 198
 199       // Whether the glyph is an outline.
 200       const bool isOutline = 0u != style.outline;
 201
 202       // Whether the current glyph is a color one.
 203       const bool isColorGlyph = mFontClient.IsColorGlyph(glyph.fontId, glyph.index);
 204
 205       if(!isOutline || (isOutline && !isColorGlyph))
 206       {
 207         // Retrieve the emoji's bitmap.
 208         TextAbstraction::FontClient::GlyphBufferData glyphBufferData;
 209         glyphBufferData.width  = isColorGlyph ? glyph.width : 0; // Desired width and height.
 210         glyphBufferData.height = isColorGlyph ? glyph.height : 0;
 211
 212         mFontClient.CreateBitmap(glyph.fontId,
 213                                  glyph.index,
 214                                  glyph.isItalicRequired,
 215                                  glyph.isBoldRequired,
 216                                  glyphBufferData,
 217                                  style.outline);
 218
 219         uint32_t glyphBufferSize = glyphBufferData.width * glyphBufferData.height * Pixel::GetBytesPerPixel(glyphBufferData.format);
 220         // If glyph buffer data don't have ownership, Or if we need to decompress, create new memory and replace ownership.
 221         if(!glyphBufferData.isBufferOwned || glyphBufferData.compressionType != TextAbstraction::FontClient::GlyphBufferData::CompressionType::NO_COMPRESSION)
 222         {
 223           uint8_t* newBuffer = (uint8_t*)malloc(glyphBufferSize);
 224           if(DALI_LIKELY(newBuffer != nullptr))
 225           {
 226             TextAbstraction::FontClient::GlyphBufferData::Decompress(glyphBufferData, newBuffer);
 227             if(glyphBufferData.isBufferOwned)
 228             {
 229               // Release previous buffer
 230               free(glyphBufferData.buffer);
 231             }
 232             glyphBufferData.isBufferOwned   = true;
 233             glyphBufferData.buffer          = newBuffer;
 234             glyphBufferData.compressionType = TextAbstraction::FontClient::GlyphBufferData::CompressionType::NO_COMPRESSION;
 235           }
 236         }
 237
 238         // Create the pixel data.
 239         bitmap = PixelData::New(glyphBufferData.buffer,
 240                                 glyphBufferSize,
 241                                 glyphBufferData.width,
 242                                 glyphBufferData.height,
 243                                 glyphBufferData.format,
 244                                 PixelData::FREE);
 245
 246         // Change buffer ownership.
 247         glyphBufferData.isBufferOwned = false;
 248
 249         if(bitmap)
 250         {
 251           // Ensure that the next image will fit into the current block size
 252           if(bitmap.GetWidth() > blockSize.mNeededBlockWidth)
 253           {
 254             blockSize.mNeededBlockWidth = bitmap.GetWidth();
 255           }
 256
 257           if(bitmap.GetHeight() > blockSize.mNeededBlockHeight)
 258           {
 259             blockSize.mNeededBlockHeight = bitmap.GetHeight();
 260           }
 261
 262           // If CheckAtlas in AtlasManager::Add can't fit the bitmap in the current atlas it will create a new atlas
 263
 264           // Setting the block size and size of new atlas does not mean a new one will be created. An existing atlas may still surffice.
 265           uint32_t default_width  = defaultTextAtlasSize.width;
 266           uint32_t default_height = defaultTextAtlasSize.height;
 267
 268           while(
 269             (blockSize.mNeededBlockWidth >= (default_width - (DOUBLE_PIXEL_PADDING + 1u)) ||
 270              blockSize.mNeededBlockHeight >= (default_height - (DOUBLE_PIXEL_PADDING + 1u))) &&
 271             (default_width < maximumTextAtlasSize.width &&
 272              default_height < maximumTextAtlasSize.height))
 273           {
 274             default_width <<= 1u;
 275             default_height <<= 1u;
 276           }
 277           mGlyphManager.SetNewAtlasSize(default_width,
 278                                         default_height,
 279                                         blockSize.mNeededBlockWidth,
 280                                         blockSize.mNeededBlockHeight);
 281
 282           // Locate a new slot for our glyph
 283           mGlyphManager.Add(glyph, style, bitmap, slot); // slot will be 0 is glyph not added
 284         }
 285       }
 286     }
 287     else
 288     {
 289       // We have 2+ copies of the same glyph
 290       mGlyphManager.AdjustReferenceCount(glyph.fontId, glyph.index, style, 1); //increment
 291     }
 292   }
 293
 294   void GenerateMesh(const GlyphInfo&         glyph,
 295                     const Vector2&           position,
 296                     const Vector4&           color,
 297                     uint16_t                 outline,
 298                     AtlasManager::AtlasSlot& slot,
 299                     bool                     decorationlineGlyph,
 300                     float                    currentUnderlinePosition,
 301                     float                    currentlineThickness,
 302                     std::vector<MeshRecord>& meshContainer,
 303                     Vector<TextCacheEntry>&  newTextCache,
 304                     Vector<Extent>&          extents,
 305                     uint32_t                 underlineChunkId,
 306                     bool                     isGlyphCached,
 307                     uint32_t                 strikethroughChunkId)
 308   {
 309     // Generate mesh data for this quad, plugging in our supplied position
 310     AtlasManager::Mesh2D newMesh;
 311     mGlyphManager.GenerateMeshData(slot.mImageId, position, newMesh);
 312
 313     if(!isGlyphCached)
 314     {
 315       TextCacheEntry textCacheEntry;
 316       textCacheEntry.mFontId       = glyph.fontId;
 317       textCacheEntry.mImageId      = slot.mImageId;
 318       textCacheEntry.mIndex        = glyph.index;
 319       textCacheEntry.mOutlineWidth = outline;
 320       textCacheEntry.isItalic      = glyph.isItalicRequired;
 321       textCacheEntry.isBold        = glyph.isBoldRequired;
 322
 323       newTextCache.PushBack(textCacheEntry);
 324     }
 325
 326     AtlasManager::Vertex2D* verticesBuffer = newMesh.mVertices.Begin();
 327
 328     for(unsigned int index = 0u, size = newMesh.mVertices.Count();
 329         index < size;
 330         ++index)
 331     {
 332       AtlasManager::Vertex2D& vertex = *(verticesBuffer + index);
 333
 334       // Set the color of the vertex.
 335       vertex.mColor = color;
 336     }
 337
 338     // Since Free Type font doesn't contain the strikethrough-position property,
 339     // strikethrough position will be calculated by moving the underline position upwards by half the value of the line height.
 340     float strikethroughStartingYPosition = (position.y + glyph.yBearing + currentUnderlinePosition) - ((glyph.height) * HALF);
 341
 342     // Find an existing mesh data object to attach to ( or create a new one, if we can't find one using the same atlas)
 343     StitchTextMesh(meshContainer,
 344                    newMesh,
 345                    extents,
 346                    position.y + glyph.yBearing,
 347                    decorationlineGlyph,
 348                    currentUnderlinePosition,
 349                    currentlineThickness,
 350                    slot,
 351                    underlineChunkId,
 352                    strikethroughStartingYPosition,
 353                    strikethroughChunkId);
 354   }
 355
 356   void CreateActors(const std::vector<MeshRecord>& meshContainer,
 357                     const Size&                    textSize,
 358                     const Vector4&                 color,
 359                     const Vector4&                 shadowColor,
 360                     const Vector2&                 shadowOffset,
 361                     Actor                          textControl,
 362                     Property::Index                animatablePropertyIndex,
 363                     bool                           drawShadow)
 364   {
 365     if(!mActor)
 366     {
 367       // Create a container actor to act as a common parent for text and shadow, to avoid color inheritence issues.
 368       mActor = Actor::New();
 369       mActor.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_LEFT);
 370       mActor.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
 371       mActor.SetProperty(Actor::Property::SIZE, textSize);
 372       mActor.SetProperty(Actor::Property::COLOR_MODE, USE_OWN_MULTIPLY_PARENT_COLOR);
 373     }
 374
 375     for(std::vector<MeshRecord>::const_iterator it    = meshContainer.begin(),
 376                                                 endIt = meshContainer.end();
 377         it != endIt;
 378         ++it)
 379     {
 380       const MeshRecord& meshRecord = *it;
 381
 382       Actor actor = CreateMeshActor(textControl, animatablePropertyIndex, color, meshRecord, textSize, STYLE_NORMAL);
 383
 384       // Whether the actor has renderers.
 385       const bool hasRenderer = actor.GetRendererCount() > 0u;
 386
 387       // Create an effect if necessary
 388       if(hasRenderer &&
 389          drawShadow)
 390       {
 391         // Change the color of the vertices.
 392         for(Vector<AtlasManager::Vertex2D>::Iterator vIt    = meshRecord.mMesh.mVertices.Begin(),
 393                                                      vEndIt = meshRecord.mMesh.mVertices.End();
 394             vIt != vEndIt;
 395             ++vIt)
 396         {
 397           AtlasManager::Vertex2D& vertex = *vIt;
 398
 399           vertex.mColor = shadowColor;
 400         }
 401
 402         Actor shadowActor = CreateMeshActor(textControl, animatablePropertyIndex, color, meshRecord, textSize, STYLE_DROP_SHADOW);
 403 #if defined(DEBUG_ENABLED)
 404         shadowActor.SetProperty(Dali::Actor::Property::NAME, "Text Shadow renderable actor");
 405 #endif
 406         // Offset shadow in x and y
 407         shadowActor.RegisterProperty("uOffset", shadowOffset);
 408         Dali::Renderer renderer(shadowActor.GetRendererAt(0));
 409         int            depthIndex = renderer.GetProperty<int>(Dali::Renderer::Property::DEPTH_INDEX);
 410         renderer.SetProperty(Dali::Renderer::Property::DEPTH_INDEX, depthIndex - 1);
 411         mActor.Add(shadowActor);
 412       }
 413
 414       if(hasRenderer)
 415       {
 416         mActor.Add(actor);
 417       }
 418     }
 419   }
 420
 421   void AddGlyphs(Text::ViewInterface&     view,
 422                  Actor                    textControl,
 423                  Property::Index          animatablePropertyIndex,
 424                  const Vector<Vector2>&   positions,
 425                  const Vector<GlyphInfo>& glyphs,
 426                  const Vector4&           defaultColor,
 427                  const Vector4* const     colorsBuffer,
 428                  const ColorIndex* const  colorIndicesBuffer,
 429                  int                      depth,
 430                  float                    minLineOffset)
 431   {
 432     AtlasManager::AtlasSlot slot;
 433     slot.mImageId = 0u;
 434     slot.mAtlasId = 0u;
 435
 436     AtlasManager::AtlasSlot slotOutline;
 437     slotOutline.mImageId = 0u;
 438     slotOutline.mAtlasId = 0u;
 439
 440     std::vector<MeshRecord> meshContainer;
 441     std::vector<MeshRecord> meshContainerOutline;
 442     Vector<Extent>          extents;
 443     Vector<Extent>          strikethroughExtents;
 444     mDepth = depth;
 445
 446     const Vector2&   textSize(view.GetLayoutSize());
 447     const Vector2    halfTextSize(textSize * 0.5f);
 448     const Vector2&   shadowOffset(view.GetShadowOffset());
 449     const Vector4&   shadowColor(view.GetShadowColor());
 450     const bool       underlineEnabled = view.IsUnderlineEnabled();
 451     const uint16_t   outlineWidth     = view.GetOutlineWidth();
 452     const Vector4&   outlineColor(view.GetOutlineColor());
 453     const bool       isOutline            = 0u != outlineWidth;
 454     const GlyphInfo* hyphens              = view.GetHyphens();
 455     const Length*    hyphenIndices        = view.GetHyphenIndices();
 456     const Length     hyphensCount         = view.GetHyphensCount();
 457     const bool       strikethroughEnabled = view.IsStrikethroughEnabled();
 458     const float      characterSpacing(view.GetCharacterSpacing());
 459
 460     // Elided text info. Indices according to elided text.
 461     const auto startIndexOfGlyphs              = view.GetStartIndexOfElidedGlyphs();
 462     const auto firstMiddleIndexOfElidedGlyphs  = view.GetFirstMiddleIndexOfElidedGlyphs();
 463     const auto secondMiddleIndexOfElidedGlyphs = view.GetSecondMiddleIndexOfElidedGlyphs();
 464
 465     const bool useDefaultColor = (NULL == colorsBuffer);
 466
 467     // Get a handle of the font client. Used to retrieve the bitmaps of the glyphs.
 468     TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
 469
 470     // Get the underline runs.
 471     const Length               numberOfUnderlineRuns = view.GetNumberOfUnderlineRuns();
 472     Vector<UnderlinedGlyphRun> underlineRuns;
 473     underlineRuns.Resize(numberOfUnderlineRuns);
 474     view.GetUnderlineRuns(underlineRuns.Begin(),
 475                           0u,
 476                           numberOfUnderlineRuns);
 477
 478     // Aggregate underline-style-properties from view
 479     const UnderlineStyleProperties viewUnderlineProperties{view.GetUnderlineType(),
 480                                                            view.GetUnderlineColor(),
 481                                                            view.GetUnderlineHeight(),
 482                                                            view.GetDashedUnderlineGap(),
 483                                                            view.GetDashedUnderlineWidth(),
 484                                                            true,
 485                                                            true,
 486                                                            true,
 487                                                            true,
 488                                                            true};
 489
 490     float maxUnderlineHeight = viewUnderlineProperties.height;
 491
 492     // Get the strikethrough runs.
 493     const Length                  numberOfStrikethroughRuns = view.GetNumberOfStrikethroughRuns();
 494     Vector<StrikethroughGlyphRun> strikethroughRuns;
 495     strikethroughRuns.Resize(numberOfStrikethroughRuns);
 496     view.GetStrikethroughRuns(strikethroughRuns.Begin(), 0u, numberOfStrikethroughRuns);
 497
 498     const StrikethroughStyleProperties viewStrikethroughProperties{view.GetStrikethroughColor(),
 499                                                                    view.GetStrikethroughHeight(),
 500                                                                    true,
 501                                                                    true};
 502
 503     float maxStrikethroughHeight = viewStrikethroughProperties.height;
 504
 505     FontId lastFontId                  = 0;
 506     Style  style                       = STYLE_NORMAL;
 507     float  currentUnderlinePosition    = ZERO;
 508     bool   thereAreUnderlinedGlyphs    = false;
 509     bool   thereAreStrikethroughGlyphs = false;
 510
 511     if(fabsf(shadowOffset.x) > Math::MACHINE_EPSILON_1 || fabsf(shadowOffset.y) > Math::MACHINE_EPSILON_1)
 512     {
 513       style = STYLE_DROP_SHADOW;
 514     }
 515
 516     CalculateBlocksSize(glyphs);
 517
 518     // Avoid emptying mTextCache (& removing references) until after incremented references for the new text
 519     Vector<TextCacheEntry> newTextCache;
 520     const GlyphInfo* const glyphsBuffer    = glyphs.Begin();
 521     const Vector2* const   positionsBuffer = positions.Begin();
 522     const Vector2          lineOffsetPosition(minLineOffset, 0.f);
 523     uint32_t               hyphenIndex = 0;
 524
 525     //For septated underlined chunks. (this is for Markup case)
 526     uint32_t                                     underlineChunkId = 0u;                            // give id for each chunk.
 527     bool                                         isPreUnderlined  = false;                         // status of underlined for previous glyph.
 528     std::map<uint32_t, UnderlineStyleProperties> mapUnderlineChunkIdWithProperties;                // mapping underlineChunkId with UnderlineStyleProperties to get properties of underlined chunk
 529     UnderlineStyleProperties                     preUnderlineProperties = viewUnderlineProperties; // the previous UnderlineStyleProperties
 530
 531     //For septated strikethrough chunks. (this is for Markup case)
 532     uint32_t                                         strikethroughChunkId = 0u;                                // give id for each chunk.
 533     bool                                             isPreStrikethrough   = false;                             // status of strikethrough for previous glyph.
 534     std::map<uint32_t, StrikethroughStyleProperties> mapStrikethroughChunkIdWithProperties;                    // mapping strikethroughChunkId with StrikethroughStyleProperties to get properties of strikethrough chunk
 535     StrikethroughStyleProperties                     preStrikethroughProperties = viewStrikethroughProperties; // the previous StrikethroughStyleProperties
 536
 537     const Character*              textBuffer                = view.GetTextBuffer();
 538     float                         calculatedAdvance         = 0.f;
 539     const Vector<CharacterIndex>& glyphToCharacterMap       = view.GetGlyphsToCharacters();
 540     const CharacterIndex*         glyphToCharacterMapBuffer = glyphToCharacterMap.Begin();
 541
 542     //Skip hyphenIndices less than startIndexOfGlyphs or between two middle of elided text
 543     if(hyphenIndices)
 544     {
 545       while((hyphenIndex < hyphensCount) && (hyphenIndices[hyphenIndex] < startIndexOfGlyphs ||
 546                                              (hyphenIndices[hyphenIndex] > firstMiddleIndexOfElidedGlyphs && hyphenIndices[hyphenIndex] < secondMiddleIndexOfElidedGlyphs)))
 547       {
 548         ++hyphenIndex;
 549       }
 550     }
 551
 552     //To keep the last fontMetrics of lastDecorativeLinesFontId
 553     FontId      lastDecorativeLinesFontId = 0; // DecorativeLines like Undeline and Strikethrough
 554     FontMetrics lastDecorativeLinesFontMetrics;
 555     fontClient.GetFontMetrics(lastDecorativeLinesFontId, lastDecorativeLinesFontMetrics);
 556
 557     // Iteration on glyphs
 558     for(uint32_t i = 0, glyphSize = glyphs.Size(); i < glyphSize; ++i)
 559     {
 560       GlyphInfo glyph;
 561       bool      addHyphen = ((hyphenIndex < hyphensCount) && hyphenIndices && ((i + startIndexOfGlyphs) == hyphenIndices[hyphenIndex]));
 562       if(addHyphen && hyphens)
 563       {
 564         glyph = hyphens[hyphenIndex];
 565         i--;
 566       }
 567       else
 568       {
 569         glyph = *(glyphsBuffer + i);
 570       }
 571
 572       Vector<UnderlinedGlyphRun>::ConstIterator currentUnderlinedGlyphRunIt = underlineRuns.End();
 573       const bool                                isGlyphUnderlined           = underlineEnabled || IsGlyphUnderlined(i, underlineRuns, currentUnderlinedGlyphRunIt);
 574       const UnderlineStyleProperties            currentUnderlineProperties  = GetCurrentUnderlineProperties(i, isGlyphUnderlined, underlineRuns, currentUnderlinedGlyphRunIt, viewUnderlineProperties);
 575       float                                     currentUnderlineHeight      = currentUnderlineProperties.height;
 576       thereAreUnderlinedGlyphs                                              = thereAreUnderlinedGlyphs || isGlyphUnderlined;
 577
 578       Vector<StrikethroughGlyphRun>::ConstIterator currentStrikethroughGlyphRunIt = strikethroughRuns.End();
 579       const bool                                   isGlyphStrikethrough           = strikethroughEnabled || IsGlyphStrikethrough(i, strikethroughRuns, currentStrikethroughGlyphRunIt);
 580       const StrikethroughStyleProperties           currentStrikethroughProperties = GetCurrentStrikethroughProperties(i, isGlyphStrikethrough, strikethroughRuns, currentStrikethroughGlyphRunIt, viewStrikethroughProperties);
 581       float                                        currentStrikethroughHeight     = currentStrikethroughProperties.height;
 582       thereAreStrikethroughGlyphs                                                 = thereAreStrikethroughGlyphs || isGlyphStrikethrough;
 583
 584       // No operation for white space
 585       if(!Dali::EqualsZero(glyph.width) && !Dali::EqualsZero(glyph.height))
 586       {
 587         // Check and update decorative-lines informations
 588         if(isGlyphUnderlined || isGlyphStrikethrough)
 589         {
 590           bool isDecorativeLinesFontIdUpdated = false;
 591           // Are we still using the same fontId as previous
 592           if(glyph.fontId != lastDecorativeLinesFontId)
 593           {
 594             // We need to fetch fresh font metrics
 595             lastDecorativeLinesFontId      = glyph.fontId;
 596             isDecorativeLinesFontIdUpdated = true;
 597             fontClient.GetFontMetrics(lastDecorativeLinesFontId, lastDecorativeLinesFontMetrics);
 598
 599             if(isGlyphStrikethrough || isGlyphUnderlined)
 600             {
 601               //The currentUnderlinePosition will be used for both Underline and/or Strikethrough
 602               currentUnderlinePosition = FetchUnderlinePositionFromFontMetrics(lastDecorativeLinesFontMetrics);
 603             }
 604           }
 605
 606           if(isGlyphUnderlined && (isDecorativeLinesFontIdUpdated || !(currentUnderlineProperties.IsHeightEqualTo(preUnderlineProperties))))
 607           {
 608             //If the Underline Height is changed then we need to recalculate height.
 609             if(!(currentUnderlineProperties.IsHeightEqualTo(preUnderlineProperties)))
 610             {
 611               maxUnderlineHeight = currentUnderlineHeight;
 612             }
 613
 614             CalcualteUnderlineHeight(lastDecorativeLinesFontMetrics, currentUnderlineHeight, maxUnderlineHeight);
 615           }
 616
 617           if(isGlyphStrikethrough && (isDecorativeLinesFontIdUpdated || !(currentStrikethroughProperties.IsHeightEqualTo(preStrikethroughProperties))))
 618           {
 619             //If the Strikethrough Height is changed then we need to recalculate height.
 620             if(!(currentStrikethroughProperties.IsHeightEqualTo(preStrikethroughProperties)))
 621             {
 622               maxStrikethroughHeight = currentStrikethroughHeight;
 623             }
 624
 625             CalcualteStrikethroughHeight(currentStrikethroughHeight, maxStrikethroughHeight);
 626           }
 627         } // decorative-lines
 628
 629         AtlasGlyphManager::GlyphStyle style;
 630         style.isItalic = glyph.isItalicRequired;
 631         style.isBold   = glyph.isBoldRequired;
 632
 633         // Retrieves and caches the glyph's bitmap.
 634         CacheGlyph(glyph, lastFontId, style, slot);
 635
 636         // Retrieves and caches the outline glyph's bitmap.
 637         if(isOutline)
 638         {
 639           style.outline = outlineWidth;
 640           CacheGlyph(glyph, lastFontId, style, slotOutline);
 641         }
 642
 643         // Move the origin (0,0) of the mesh to the center of the actor
 644         Vector2 position = *(positionsBuffer + i);
 645
 646         if(addHyphen)
 647         {
 648           GlyphInfo tempInfo = *(glyphsBuffer + i);
 649           calculatedAdvance  = GetCalculatedAdvance(*(textBuffer + (*(glyphToCharacterMapBuffer + i))), characterSpacing, tempInfo.advance);
 650           position.x         = position.x + calculatedAdvance - tempInfo.xBearing + glyph.xBearing;
 651           position.y += tempInfo.yBearing - glyph.yBearing;
 652         }
 653
 654         position = Vector2(roundf(position.x), position.y) - halfTextSize - lineOffsetPosition; // roundf() avoids pixel alignment issues.
 655
 656         if(0u != slot.mImageId) // invalid slot id, glyph has failed to be added to atlas
 657         {
 658           Vector2 positionPlusOutlineOffset = position;
 659           if(isOutline)
 660           {
 661             // Add an offset to the text.
 662             const float outlineWidthOffset = static_cast<float>(outlineWidth);
 663             positionPlusOutlineOffset += Vector2(outlineWidthOffset, outlineWidthOffset);
 664           }
 665
 666           // Get the color of the character.
 667           const ColorIndex colorIndex = useDefaultColor ? 0u : *(colorIndicesBuffer + i);
 668           const Vector4&   color      = (useDefaultColor || (0u == colorIndex)) ? defaultColor : *(colorsBuffer + colorIndex - 1u);
 669
 670           //The new underlined chunk. Add new id if they are not consecutive indices (this is for Markup case)
 671           // Examples: "Hello <u>World</u> Hello <u>World</u>", "<u>World</u> Hello <u>World</u>", "<u>   World</u> Hello <u>World</u>"
 672           if((!isPreUnderlined && isGlyphUnderlined) || (isGlyphUnderlined && (preUnderlineProperties != currentUnderlineProperties)))
 673           {
 674             underlineChunkId++;
 675             mapUnderlineChunkIdWithProperties.insert(std::pair<uint32_t, UnderlineStyleProperties>(underlineChunkId, currentUnderlineProperties));
 676           }
 677
 678           //Keep status of underlined for previous glyph to check consecutive indices
 679           isPreUnderlined        = isGlyphUnderlined;
 680           preUnderlineProperties = currentUnderlineProperties;
 681
 682           GenerateMesh(glyph,
 683                        positionPlusOutlineOffset,
 684                        color,
 685                        NO_OUTLINE,
 686                        slot,
 687                        isGlyphUnderlined,
 688                        currentUnderlinePosition,
 689                        maxUnderlineHeight,
 690                        meshContainer,
 691                        newTextCache,
 692                        extents,
 693                        underlineChunkId,
 694                        false,
 695                        0u);
 696
 697           if(isGlyphStrikethrough)
 698           {
 699             //The new strikethrough chunk. Add new id if they are not consecutive indices (this is for Markup case)
 700             // Examples: "Hello <s>World</s> Hello <s>World</s>", "<s>World</s> Hello <s>World</s>", "<s>   World</s> Hello <s>World</s>"
 701             if((!isPreStrikethrough) || (preStrikethroughProperties != currentStrikethroughProperties))
 702             {
 703               strikethroughChunkId++;
 704               mapStrikethroughChunkIdWithProperties.insert(std::pair<uint32_t, StrikethroughStyleProperties>(strikethroughChunkId, currentStrikethroughProperties));
 705             }
 706
 707             GenerateMesh(glyph,
 708                          positionPlusOutlineOffset,
 709                          color,
 710                          NO_OUTLINE,
 711                          slot,
 712                          isGlyphStrikethrough,
 713                          0.0f,
 714                          maxStrikethroughHeight,
 715                          meshContainer,
 716                          newTextCache,
 717                          strikethroughExtents,
 718                          0u,
 719                          true,
 720                          strikethroughChunkId);
 721           }
 722
 723           //Keep status of Strikethrough for previous glyph to check consecutive indices
 724           isPreStrikethrough         = isGlyphStrikethrough;
 725           preStrikethroughProperties = currentStrikethroughProperties;
 726
 727           lastFontId = glyph.fontId; // Prevents searching for existing blocksizes when string of the same fontId.
 728         }
 729
 730         if(isOutline && (0u != slotOutline.mImageId)) // invalid slot id, glyph has failed to be added to atlas
 731         {
 732           GenerateMesh(glyph,
 733                        position,
 734                        outlineColor,
 735                        outlineWidth,
 736                        slotOutline,
 737                        false,
 738                        currentUnderlinePosition,
 739                        maxUnderlineHeight,
 740                        meshContainerOutline,
 741                        newTextCache,
 742                        extents,
 743                        0u,
 744                        false,
 745                        0u);
 746         }
 747       }
 748
 749       if(addHyphen)
 750       {
 751         hyphenIndex++;
 752       }
 753     } // glyphs
 754
 755     // Now remove references for the old text
 756     RemoveText();
 757     mTextCache.Swap(newTextCache);
 758
 759     if(thereAreUnderlinedGlyphs)
 760     {
 761       // Check to see if any of the text needs an underline
 762       GenerateUnderlines(meshContainer, extents, viewUnderlineProperties, mapUnderlineChunkIdWithProperties);
 763     }
 764
 765     if(thereAreStrikethroughGlyphs)
 766     {
 767       // Check to see if any of the text needs a strikethrough
 768       GenerateStrikethrough(meshContainer, strikethroughExtents, viewStrikethroughProperties, mapStrikethroughChunkIdWithProperties);
 769     }
 770
 771     // For each MeshData object, create a mesh actor and add to the renderable actor
 772     bool isShadowDrawn = false;
 773     if(!meshContainerOutline.empty())
 774     {
 775       const bool drawShadow = STYLE_DROP_SHADOW == style;
 776       CreateActors(meshContainerOutline,
 777                    textSize,
 778                    outlineColor,
 779                    shadowColor,
 780                    shadowOffset,
 781                    textControl,
 782                    animatablePropertyIndex,
 783                    drawShadow);
 784
 785       isShadowDrawn = drawShadow;
 786     }
 787
 788     // For each MeshData object, create a mesh actor and add to the renderable actor
 789     if(!meshContainer.empty())
 790     {
 791       const bool drawShadow = !isShadowDrawn && (STYLE_DROP_SHADOW == style);
 792       CreateActors(meshContainer,
 793                    textSize,
 794                    defaultColor,
 795                    shadowColor,
 796                    shadowOffset,
 797                    textControl,
 798                    animatablePropertyIndex,
 799                    drawShadow);
 800     }
 801
 802 #if defined(DEBUG_ENABLED)
 803     Toolkit::AtlasGlyphManager::Metrics metrics = mGlyphManager.GetMetrics();
 804     DALI_LOG_INFO(gLogFilter, Debug::General, "TextAtlasRenderer::GlyphManager::GlyphCount: %i, AtlasCount: %i, TextureMemoryUse: %iK\n", metrics.mGlyphCount, metrics.mAtlasMetrics.mAtlasCount, metrics.mAtlasMetrics.mTextureMemoryUsed / 1024);
 805
 806     if(gLogFilter->IsEnabledFor(Debug::Verbose))
 807     {
 808       DALI_LOG_INFO(gLogFilter, Debug::Verbose, "%s\n", metrics.mVerboseGlyphCounts.c_str());
 809
 810       for(uint32_t i = 0; i < metrics.mAtlasMetrics.mAtlasCount; ++i)
 811       {
 812         DALI_LOG_INFO(gLogFilter, Debug::Verbose, "   Atlas [%i] %sPixels: %s Size: %ix%i, BlockSize: %ix%i, BlocksUsed: %i/%i\n", i + 1, i > 8 ? "" : " ", metrics.mAtlasMetrics.mAtlasMetrics[i].mPixelFormat == Pixel::L8 ? "L8  " : "BGRA", metrics.mAtlasMetrics.mAtlasMetrics[i].mSize.mWidth, metrics.mAtlasMetrics.mAtlasMetrics[i].mSize.mHeight, metrics.mAtlasMetrics.mAtlasMetrics[i].mSize.mBlockWidth, metrics.mAtlasMetrics.mAtlasMetrics[i].mSize.mBlockHeight, metrics.mAtlasMetrics.mAtlasMetrics[i].mBlocksUsed, metrics.mAtlasMetrics.mAtlasMetrics[i].mTotalBlocks);
 813       }
 814     }
 815 #endif
 816   }
 817
 818   void RemoveText()
 819   {
 820     for(Vector<TextCacheEntry>::Iterator oldTextIter = mTextCache.Begin(); oldTextIter != mTextCache.End(); ++oldTextIter)
 821     {
 822       AtlasGlyphManager::GlyphStyle style;
 823       style.outline  = oldTextIter->mOutlineWidth;
 824       style.isItalic = oldTextIter->isItalic;
 825       style.isBold   = oldTextIter->isBold;
 826       mGlyphManager.AdjustReferenceCount(oldTextIter->mFontId, oldTextIter->mIndex, style, -1 /*decrement*/);
 827     }
 828     mTextCache.Resize(0);
 829   }
 830
 831   Actor CreateMeshActor(Actor textControl, Property::Index animatablePropertyIndex, const Vector4& defaultColor, const MeshRecord& meshRecord, const Vector2& actorSize, Style style)
 832   {
 833     VertexBuffer quadVertices = VertexBuffer::New(mQuadVertexFormat);
 834     quadVertices.SetData(const_cast<AtlasManager::Vertex2D*>(&meshRecord.mMesh.mVertices[0]), meshRecord.mMesh.mVertices.Size());
 835
 836     Geometry quadGeometry = Geometry::New();
 837     quadGeometry.AddVertexBuffer(quadVertices);
 838     quadGeometry.SetIndexBuffer(&meshRecord.mMesh.mIndices[0], meshRecord.mMesh.mIndices.Size());
 839
 840     TextureSet textureSet(mGlyphManager.GetTextures(meshRecord.mAtlasId));
 841
 842     // Choose the shader to use.
 843     const bool isColorShader = (STYLE_DROP_SHADOW != style) && (Pixel::BGRA8888 == mGlyphManager.GetPixelFormat(meshRecord.mAtlasId));
 844     Shader     shader;
 845     if(isColorShader)
 846     {
 847       // The glyph is an emoji and is not a shadow.
 848       if(!mShaderRgba)
 849       {
 850         mShaderRgba = Shader::New(SHADER_TEXT_ATLAS_SHADER_VERT, SHADER_TEXT_ATLAS_RGBA_SHADER_FRAG);
 851       }
 852       shader = mShaderRgba;
 853     }
 854     else
 855     {
 856       // The glyph is text or a shadow.
 857       if(!mShaderL8)
 858       {
 859         mShaderL8 = Shader::New(SHADER_TEXT_ATLAS_SHADER_VERT, SHADER_TEXT_ATLAS_L8_SHADER_FRAG);
 860       }
 861       shader = mShaderL8;
 862     }
 863
 864     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "defaultColor[%f, %f, %f, %f ]\n", defaultColor.r, defaultColor.g, defaultColor.b, defaultColor.a);
 865
 866     Dali::Property::Index shaderTextColorIndex = shader.RegisterProperty("textColorAnimatable", defaultColor);
 867
 868     if(animatablePropertyIndex != Property::INVALID_INDEX)
 869     {
 870       // create constraint for the animatable text's color Property with textColorAnimatable in the shader.
 871       if(shaderTextColorIndex)
 872       {
 873         Constraint constraint = Constraint::New<Vector4>(shader, shaderTextColorIndex, EqualToConstraint());
 874         constraint.AddSource(Source(textControl, animatablePropertyIndex));
 875         constraint.Apply();
 876       }
 877     }
 878     else
 879     {
 880       // If not animating the text colour then set to 1's so shader uses the current vertex color
 881       shader.RegisterProperty("textColorAnimatable", Vector4(1.0, 1.0, 1.0, 1.0));
 882     }
 883
 884     Dali::Renderer renderer = Dali::Renderer::New(quadGeometry, shader);
 885     renderer.SetTextures(textureSet);
 886     renderer.SetProperty(Dali::Renderer::Property::BLEND_MODE, BlendMode::ON);
 887     renderer.SetProperty(Dali::Renderer::Property::DEPTH_INDEX, DepthIndex::CONTENT + mDepth);
 888
 889     Actor actor = Actor::New();
 890 #if defined(DEBUG_ENABLED)
 891     actor.SetProperty(Dali::Actor::Property::NAME, "Text renderable actor");
 892 #endif
 893     actor.AddRenderer(renderer);
 894     // Keep all of the origins aligned
 895     actor.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_LEFT);
 896     actor.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
 897     actor.SetProperty(Actor::Property::SIZE, actorSize);
 898     actor.RegisterProperty("uOffset", Vector2::ZERO);
 899     actor.SetProperty(Actor::Property::COLOR_MODE, USE_OWN_MULTIPLY_PARENT_COLOR);
 900
 901     return actor;
 902   }
 903
 904   void StitchTextMesh(std::vector<MeshRecord>& meshContainer,
 905                       AtlasManager::Mesh2D&    newMesh,
 906                       Vector<Extent>&          extents,
 907                       float                    baseLine,
 908                       bool                     decorationlineGlyph,
 909                       float                    underlinePosition,
 910                       float                    lineThickness,
 911                       AtlasManager::AtlasSlot& slot,
 912                       uint32_t                 underlineChunkId,
 913                       float                    strikethroughPosition,
 914                       uint32_t                 strikethroughChunkId)
 915   {
 916     if(slot.mImageId)
 917     {
 918       float left  = newMesh.mVertices[0].mPosition.x;
 919       float right = newMesh.mVertices[1].mPosition.x;
 920
 921       // Check to see if there's a mesh data object that references the same atlas ?
 922       uint32_t index = 0;
 923       for(std::vector<MeshRecord>::iterator mIt    = meshContainer.begin(),
 924                                             mEndIt = meshContainer.end();
 925           mIt != mEndIt;
 926           ++mIt, ++index)
 927       {
 928         if(slot.mAtlasId == mIt->mAtlasId)
 929         {
 930           // Append the mesh to the existing mesh and adjust any extents
 931           Toolkit::Internal::AtlasMeshFactory::AppendMesh(mIt->mMesh, newMesh);
 932
 933           if(decorationlineGlyph)
 934           {
 935             AdjustExtents(extents,
 936                           meshContainer,
 937                           index,
 938                           left,
 939                           right,
 940                           baseLine,
 941                           underlinePosition,
 942                           lineThickness,
 943                           underlineChunkId,
 944                           strikethroughPosition,
 945                           strikethroughChunkId);
 946           }
 947
 948           return;
 949         }
 950       }
 951
 952       // No mesh data object currently exists that references this atlas, so create a new one
 953       MeshRecord meshRecord;
 954       meshRecord.mAtlasId = slot.mAtlasId;
 955       meshRecord.mMesh    = newMesh;
 956       meshContainer.push_back(meshRecord);
 957
 958       if(decorationlineGlyph)
 959       {
 960         // Adjust extents for this new meshrecord
 961         AdjustExtents(extents,
 962                       meshContainer,
 963                       meshContainer.size() - 1u,
 964                       left,
 965                       right,
 966                       baseLine,
 967                       underlinePosition,
 968                       lineThickness,
 969                       underlineChunkId,
 970                       strikethroughPosition,
 971                       strikethroughChunkId);
 972       }
 973     }
 974   }
 975
 976   void AdjustExtents(Vector<Extent>&          extents,
 977                      std::vector<MeshRecord>& meshRecords,
 978                      uint32_t                 index,
 979                      float                    left,
 980                      float                    right,
 981                      float                    baseLine,
 982                      float                    underlinePosition,
 983                      float                    lineThickness,
 984                      uint32_t                 underlineChunkId,
 985                      float                    strikethroughPosition,
 986                      uint32_t                 strikethroughChunkId)
 987   {
 988     bool foundExtent = false;
 989     for(Vector<Extent>::Iterator eIt    = extents.Begin(),
 990                                  eEndIt = extents.End();
 991         eIt != eEndIt;
 992         ++eIt)
 993     {
 994       if(Equals(baseLine, eIt->mBaseLine) && underlineChunkId == eIt->mUnderlineChunkId && strikethroughChunkId == eIt->mStrikethroughChunkId)
 995       {
 996         foundExtent = true;
 997         if(left < eIt->mLeft)
 998         {
 999           eIt->mLeft = left;
1000         }
1001         if(right > eIt->mRight)
1002         {
1003           eIt->mRight = right;
1004         }
1005
1006         if(underlinePosition > eIt->mUnderlinePosition)
1007         {
1008           eIt->mUnderlinePosition = underlinePosition;
1009         }
1010         if(lineThickness > eIt->mLineThickness)
1011         {
1012           eIt->mLineThickness = lineThickness;
1013         }
1014       }
1015     }
1016     if(!foundExtent)
1017     {
1018       Extent extent;
1019       extent.mLeft                  = left;
1020       extent.mRight                 = right;
1021       extent.mBaseLine              = baseLine;
1022       extent.mUnderlinePosition     = underlinePosition;
1023       extent.mMeshRecordIndex       = index;
1024       extent.mUnderlineChunkId      = underlineChunkId;
1025       extent.mLineThickness         = lineThickness;
1026       extent.mStrikethroughPosition = strikethroughPosition;
1027       extent.mStrikethroughChunkId  = strikethroughChunkId;
1028       extents.PushBack(extent);
1029     }
1030   }
1031
1032   void CalculateBlocksSize(const Vector<GlyphInfo>& glyphs)
1033   {
1034     for(Vector<GlyphInfo>::ConstIterator glyphIt    = glyphs.Begin(),
1035                                          glyphEndIt = glyphs.End();
1036         glyphIt != glyphEndIt;
1037         ++glyphIt)
1038     {
1039       const FontId fontId    = (*glyphIt).fontId;
1040       bool         foundFont = false;
1041
1042       for(std::vector<MaxBlockSize>::const_iterator blockIt    = mBlockSizes.begin(),
1043                                                     blockEndIt = mBlockSizes.end();
1044           blockIt != blockEndIt;
1045           ++blockIt)
1046       {
1047         if((*blockIt).mFontId == fontId) // Different size fonts will have a different fontId
1048         {
1049           DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Text::AtlasRenderer::CalculateBlocksSize match found fontID(%u) glyphIndex(%u)\n", fontId, (*glyphIt).index);
1050           foundFont = true;
1051           break;
1052         }
1053       }
1054
1055       if(!foundFont)
1056       {
1057         FontMetrics fontMetrics;
1058         mFontClient.GetFontMetrics(fontId, fontMetrics);
1059
1060         MaxBlockSize maxBlockSize;
1061         maxBlockSize.mNeededBlockWidth  = static_cast<uint32_t>(fontMetrics.height);
1062         maxBlockSize.mNeededBlockHeight = maxBlockSize.mNeededBlockWidth;
1063         maxBlockSize.mFontId            = fontId;
1064         DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Text::AtlasRenderer::CalculateBlocksSize New font with no matched blocksize, setting blocksize[%u]\n", maxBlockSize.mNeededBlockWidth);
1065         mBlockSizes.push_back(maxBlockSize);
1066       }
1067     }
1068   }
1069
1070   void GenerateUnderlines(std::vector<MeshRecord>&                            meshRecords,
1071                           Vector<Extent>&                                     extents,
1072                           const UnderlineStyleProperties&                     viewUnderlineProperties,
1073                           const std::map<uint32_t, UnderlineStyleProperties>& mapUnderlineChunkIdWithProperties)
1074   {
1075     AtlasManager::Mesh2D newMesh;
1076     unsigned short       faceIndex = 0;
1077
1078     for(Vector<Extent>::ConstIterator eIt    = extents.Begin(),
1079                                       eEndIt = extents.End();
1080         eIt != eEndIt;
1081         ++eIt)
1082     {
1083       AtlasManager::Vertex2D vert;
1084       uint32_t               index = eIt->mMeshRecordIndex;
1085       Vector2                uv    = mGlyphManager.GetAtlasSize(meshRecords[index].mAtlasId);
1086
1087       auto pairUnderlineChunkIdWithProperties = mapUnderlineChunkIdWithProperties.find(eIt->mUnderlineChunkId);
1088
1089       const UnderlineStyleProperties underlineProperties = (pairUnderlineChunkIdWithProperties == mapUnderlineChunkIdWithProperties.end())
1090                                                              ? viewUnderlineProperties
1091                                                              : pairUnderlineChunkIdWithProperties->second;
1092
1093       const Vector4&               underlineColor       = underlineProperties.colorDefined ? underlineProperties.color : viewUnderlineProperties.color;
1094       const Text::Underline::Type& underlineType        = underlineProperties.typeDefined ? underlineProperties.type : viewUnderlineProperties.type;
1095       const float&                 dashedUnderlineGap   = underlineProperties.dashGapDefined ? underlineProperties.dashGap : viewUnderlineProperties.dashGap;
1096       const float&                 dashedUnderlineWidth = underlineProperties.dashWidthDefined ? underlineProperties.dashWidth : viewUnderlineProperties.dashWidth;
1097
1098       // Make sure we don't hit texture edge for single pixel texture ( filled pixel is in top left of every atlas )
1099       float u           = HALF / uv.x;
1100       float v           = HALF / uv.y;
1101       float thickness   = eIt->mLineThickness;
1102       float ShiftLineBy = (underlineType == Text::Underline::Type::DOUBLE) ? (thickness * ONE_AND_A_HALF) : (thickness * HALF);
1103       float baseLine    = eIt->mBaseLine + eIt->mUnderlinePosition - ShiftLineBy;
1104       float tlx         = eIt->mLeft;
1105       float brx         = eIt->mRight;
1106
1107       if(underlineType == Text::Underline::Type::DASHED)
1108       {
1109         float dashTlx = tlx;
1110         float dashBrx = tlx;
1111
1112         while((dashTlx >= tlx) && (dashTlx < brx) && ((dashTlx + dashedUnderlineWidth) <= brx))
1113         {
1114           dashBrx = dashTlx + dashedUnderlineWidth;
1115
1116           //The top left edge of the underline
1117           vert.mPosition.x  = dashTlx;
1118           vert.mPosition.y  = baseLine;
1119           vert.mTexCoords.x = ZERO;
1120           vert.mTexCoords.y = ZERO;
1121           vert.mColor       = underlineColor;
1122           newMesh.mVertices.PushBack(vert);
1123
1124           //The top right edge of the underline
1125           vert.mPosition.x  = dashBrx;
1126           vert.mPosition.y  = baseLine;
1127           vert.mTexCoords.x = u;
1128           vert.mColor       = underlineColor;
1129           newMesh.mVertices.PushBack(vert);
1130
1131           //The bottom left edge of the underline
1132           vert.mPosition.x  = dashTlx;
1133           vert.mPosition.y  = baseLine + thickness;
1134           vert.mTexCoords.x = ZERO;
1135           vert.mTexCoords.y = v;
1136           vert.mColor       = underlineColor;
1137           newMesh.mVertices.PushBack(vert);
1138
1139           //The bottom right edge of the underline
1140           vert.mPosition.x  = dashBrx;
1141           vert.mPosition.y  = baseLine + thickness;
1142           vert.mTexCoords.x = u;
1143           vert.mColor       = underlineColor;
1144           newMesh.mVertices.PushBack(vert);
1145
1146           dashTlx = dashBrx + dashedUnderlineGap; // The next dash will start at the right of the current dash plus the gap
1147
1148           // Six indices in counter clockwise winding
1149           newMesh.mIndices.PushBack(faceIndex + 1u);
1150           newMesh.mIndices.PushBack(faceIndex);
1151           newMesh.mIndices.PushBack(faceIndex + 2u);
1152           newMesh.mIndices.PushBack(faceIndex + 2u);
1153           newMesh.mIndices.PushBack(faceIndex + 3u);
1154           newMesh.mIndices.PushBack(faceIndex + 1u);
1155
1156           faceIndex += 4;
1157
1158           Toolkit::Internal::AtlasMeshFactory::AppendMesh(meshRecords[index].mMesh, newMesh);
1159         }
1160       }
1161       else
1162       {
1163         // It's either SOLID or DOUBLE so we need to generate the first solid underline anyway.
1164         vert.mPosition.x  = tlx;
1165         vert.mPosition.y  = baseLine;
1166         vert.mTexCoords.x = ZERO;
1167         vert.mTexCoords.y = ZERO;
1168         vert.mColor       = underlineColor;
1169         newMesh.mVertices.PushBack(vert);
1170
1171         vert.mPosition.x  = brx;
1172         vert.mPosition.y  = baseLine;
1173         vert.mTexCoords.x = u;
1174         vert.mColor       = underlineColor;
1175         newMesh.mVertices.PushBack(vert);
1176
1177         vert.mPosition.x  = tlx;
1178         vert.mPosition.y  = baseLine + thickness;
1179         vert.mTexCoords.x = ZERO;
1180         vert.mTexCoords.y = v;
1181         vert.mColor       = underlineColor;
1182         newMesh.mVertices.PushBack(vert);
1183
1184         vert.mPosition.x  = brx;
1185         vert.mPosition.y  = baseLine + thickness;
1186         vert.mTexCoords.x = u;
1187         vert.mColor       = underlineColor;
1188         newMesh.mVertices.PushBack(vert);
1189
1190         // Six indices in counter clockwise winding
1191         newMesh.mIndices.PushBack(faceIndex + 1u);
1192         newMesh.mIndices.PushBack(faceIndex);
1193         newMesh.mIndices.PushBack(faceIndex + 2u);
1194         newMesh.mIndices.PushBack(faceIndex + 2u);
1195         newMesh.mIndices.PushBack(faceIndex + 3u);
1196         newMesh.mIndices.PushBack(faceIndex + 1u);
1197         faceIndex += 4;
1198
1199         Toolkit::Internal::AtlasMeshFactory::AppendMesh(meshRecords[index].mMesh, newMesh);
1200
1201         if(underlineType == Text::Underline::Type::DOUBLE)
1202         {
1203           baseLine += 2 * thickness;
1204
1205           //The top left edge of the underline
1206           vert.mPosition.x  = tlx;
1207           vert.mPosition.y  = baseLine; // Vertical start of the second underline
1208           vert.mTexCoords.x = ZERO;
1209           vert.mTexCoords.y = ZERO;
1210           vert.mColor       = underlineColor;
1211           newMesh.mVertices.PushBack(vert);
1212
1213           //The top right edge of the underline
1214           vert.mPosition.x  = brx;
1215           vert.mPosition.y  = baseLine;
1216           vert.mTexCoords.x = u;
1217           vert.mColor       = underlineColor;
1218           newMesh.mVertices.PushBack(vert);
1219
1220           //The bottom left edge of the underline
1221           vert.mPosition.x  = tlx;
1222           vert.mPosition.y  = baseLine + thickness; // Vertical End of the second underline
1223           vert.mTexCoords.x = ZERO;
1224           vert.mTexCoords.y = v;
1225           vert.mColor       = underlineColor;
1226           newMesh.mVertices.PushBack(vert);
1227
1228           //The bottom right edge of the underline
1229           vert.mPosition.x  = brx;
1230           vert.mPosition.y  = baseLine + thickness;
1231           vert.mTexCoords.x = u;
1232           vert.mColor       = underlineColor;
1233           newMesh.mVertices.PushBack(vert);
1234
1235           // Six indices in counter clockwise winding
1236           newMesh.mIndices.PushBack(faceIndex + 1u);
1237           newMesh.mIndices.PushBack(faceIndex);
1238           newMesh.mIndices.PushBack(faceIndex + 2u);
1239           newMesh.mIndices.PushBack(faceIndex + 2u);
1240           newMesh.mIndices.PushBack(faceIndex + 3u);
1241           newMesh.mIndices.PushBack(faceIndex + 1u);
1242
1243           faceIndex += 4;
1244
1245           Toolkit::Internal::AtlasMeshFactory::AppendMesh(meshRecords[index].mMesh, newMesh);
1246         }
1247       }
1248     }
1249   }
1250
1251   void GenerateStrikethrough(std::vector<MeshRecord>&                                meshRecords,
1252                              Vector<Extent>&                                         extents,
1253                              const StrikethroughStyleProperties&                     viewStrikethroughProperties,
1254                              const std::map<uint32_t, StrikethroughStyleProperties>& mapStrikethroughChunkIdWithProperties)
1255   {
1256     AtlasManager::Mesh2D newMesh;
1257     unsigned short       faceIndex = 0;
1258     for(Vector<Extent>::ConstIterator eIt    = extents.Begin(),
1259                                       eEndIt = extents.End();
1260         eIt != eEndIt;
1261         ++eIt)
1262     {
1263       AtlasManager::Vertex2D vert;
1264       uint32_t               index = eIt->mMeshRecordIndex;
1265       Vector2                uv    = mGlyphManager.GetAtlasSize(meshRecords[index].mAtlasId);
1266
1267       auto pairStrikethroughChunkIdWithProperties = mapStrikethroughChunkIdWithProperties.find(eIt->mStrikethroughChunkId);
1268
1269       const StrikethroughStyleProperties strikethroughProperties = (pairStrikethroughChunkIdWithProperties == mapStrikethroughChunkIdWithProperties.end())
1270                                                                      ? viewStrikethroughProperties
1271                                                                      : pairStrikethroughChunkIdWithProperties->second;
1272
1273       const Vector4& strikethroughColor = strikethroughProperties.colorDefined ? strikethroughProperties.color : viewStrikethroughProperties.color;
1274
1275       // Make sure we don't hit texture edge for single pixel texture ( filled pixel is in top left of every atlas )
1276       float u                     = HALF / uv.x;
1277       float v                     = HALF / uv.y;
1278       float thickness             = eIt->mLineThickness;
1279       float tlx                   = eIt->mLeft;
1280       float brx                   = eIt->mRight;
1281       float strikethroughPosition = eIt->mStrikethroughPosition;
1282
1283       vert.mPosition.x  = tlx;
1284       vert.mPosition.y  = strikethroughPosition;
1285       vert.mTexCoords.x = ZERO;
1286       vert.mTexCoords.y = ZERO;
1287       vert.mColor       = strikethroughColor;
1288       newMesh.mVertices.PushBack(vert);
1289
1290       vert.mPosition.x  = brx;
1291       vert.mPosition.y  = strikethroughPosition;
1292       vert.mTexCoords.x = u;
1293       vert.mColor       = strikethroughColor;
1294       newMesh.mVertices.PushBack(vert);
1295
1296       vert.mPosition.x  = tlx;
1297       vert.mPosition.y  = strikethroughPosition + thickness;
1298       vert.mTexCoords.x = ZERO;
1299       vert.mTexCoords.y = v;
1300       vert.mColor       = strikethroughColor;
1301       newMesh.mVertices.PushBack(vert);
1302
1303       vert.mPosition.x  = brx;
1304       vert.mPosition.y  = strikethroughPosition + thickness;
1305       vert.mTexCoords.x = u;
1306       vert.mColor       = strikethroughColor;
1307       newMesh.mVertices.PushBack(vert);
1308
1309       // Six indices in counter clockwise winding
1310       newMesh.mIndices.PushBack(faceIndex + 1u);
1311       newMesh.mIndices.PushBack(faceIndex);
1312       newMesh.mIndices.PushBack(faceIndex + 2u);
1313       newMesh.mIndices.PushBack(faceIndex + 2u);
1314       newMesh.mIndices.PushBack(faceIndex + 3u);
1315       newMesh.mIndices.PushBack(faceIndex + 1u);
1316       faceIndex += 4;
1317
1318       Toolkit::Internal::AtlasMeshFactory::AppendMesh(meshRecords[index].mMesh, newMesh);
1319     }
1320   }
1321
1322   Actor                       mActor;            ///< The actor parent which renders the text
1323   AtlasGlyphManager           mGlyphManager;     ///< Glyph Manager to handle upload and caching
1324   TextAbstraction::FontClient mFontClient;       ///< The font client used to supply glyph information
1325   Shader                      mShaderL8;         ///< The shader for glyphs and emoji's shadows.
1326   Shader                      mShaderRgba;       ///< The shader for emojis.
1327   std::vector<MaxBlockSize>   mBlockSizes;       ///< Maximum size needed to contain a glyph in a block within a new atlas
1328   Vector<TextCacheEntry>      mTextCache;        ///< Caches data from previous render
1329   Property::Map               mQuadVertexFormat; ///< Describes the vertex format for text
1330   int                         mDepth;            ///< DepthIndex passed by control when connect to stage
1331 };
1332
1333 Text::RendererPtr AtlasRenderer::New()
1334 {
1335   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Text::AtlasRenderer::New()\n");
1336
1337   return Text::RendererPtr(new AtlasRenderer());
1338 }
1339
1340 Actor AtlasRenderer::Render(Text::ViewInterface& view,
1341                             Actor                textControl,
1342                             Property::Index      animatablePropertyIndex,
1343                             float&               alignmentOffset,
1344                             int                  depth)
1345 {
1346   DALI_LOG_INFO(gLogFilter, Debug::General, "Text::AtlasRenderer::Render()\n");
1347
1348   UnparentAndReset(mImpl->mActor);
1349
1350   Length numberOfGlyphs = view.GetNumberOfGlyphs();
1351
1352   if(numberOfGlyphs > 0u)
1353   {
1354     Vector<GlyphInfo> glyphs;
1355     glyphs.Resize(numberOfGlyphs);
1356
1357     Vector<Vector2> positions;
1358     positions.Resize(numberOfGlyphs);
1359
1360     numberOfGlyphs = view.GetGlyphs(glyphs.Begin(),
1361                                     positions.Begin(),
1362                                     alignmentOffset,
1363                                     0u,
1364                                     numberOfGlyphs);
1365
1366     glyphs.Resize(numberOfGlyphs);
1367     positions.Resize(numberOfGlyphs);
1368
1369     const Vector4* const    colorsBuffer       = view.GetColors();
1370     const ColorIndex* const colorIndicesBuffer = view.GetColorIndices();
1371     const Vector4&          defaultColor       = view.GetTextColor();
1372
1373     mImpl->AddGlyphs(view,
1374                      textControl,
1375                      animatablePropertyIndex,
1376                      positions,
1377                      glyphs,
1378                      defaultColor,
1379                      colorsBuffer,
1380                      colorIndicesBuffer,
1381                      depth,
1382                      alignmentOffset);
1383
1384     /* In the case where AddGlyphs does not create a renderable Actor for example when glyphs are all whitespace create a new Actor. */
1385     /* This renderable actor is used to position the text, other "decorations" can rely on there always being an Actor regardless of it is whitespace or regular text. */
1386     if(!mImpl->mActor)
1387     {
1388       mImpl->mActor = Actor::New();
1389     }
1390   }
1391
1392   return mImpl->mActor;
1393 }
1394
1395 AtlasRenderer::AtlasRenderer()
1396 {
1397   mImpl = new Impl();
1398 }
1399
1400 AtlasRenderer::~AtlasRenderer()
1401 {
1402   mImpl->RemoveText();
1403   delete mImpl;
1404 }