+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// FILE HEADER
+#include <dali-toolkit/devel-api/text/text-utils-devel.h>
+
+// EXTERNAL INCLUDES
+#include <dali/devel-api/text-abstraction/font-client.h>
+#include <dali/devel-api/text-abstraction/text-renderer.h>
+#include <dali/devel-api/text-abstraction/text-renderer-layout-helper.h>
+#include <dali/integration-api/debug.h>
+#include <dali/devel-api/scripting/enum-helper.h>
+#include <cstring>
+
+// INTERNAL INCLUDES
+#include <dali-toolkit/internal/text/bidirectional-support.h>
+#include <dali-toolkit/internal/text/character-set-conversion.h>
+#include <dali-toolkit/internal/text/color-segmentation.h>
+#include <dali-toolkit/internal/text/layouts/layout-engine.h>
+#include <dali-toolkit/internal/text/layouts/layout-parameters.h>
+#include <dali-toolkit/internal/text/logical-model-impl.h>
+#include <dali-toolkit/internal/text/markup-processor.h>
+#include <dali-toolkit/internal/text/multi-language-support.h>
+#include <dali-toolkit/internal/text/segmentation.h>
+#include <dali-toolkit/internal/text/shaper.h>
+#include <dali-toolkit/internal/text/text-enumerations-impl.h>
+#include <dali-toolkit/internal/text/text-font-style.h>
+#include <dali-toolkit/internal/text/visual-model-impl.h>
+
+namespace Dali
+{
+
+using namespace TextAbstraction;
+
+namespace Toolkit
+{
+using namespace Text;
+
+namespace DevelText
+{
+
+namespace Layout
+{
+
+/**
+ * @brief The text's layout.
+ */
+enum Type
+{
+ SINGLELINE, ///< The text is laid out on a single line.
+ MULTILINE, ///< The text is laid out in multiple lines.
+ CIRCULAR, ///< The text is laid out on a single line following a circular path.
+};
+
+} // namespace Layout
+
+namespace CircularAlignment
+{
+
+/**
+ * @brief The enumerations for the circular alignment.
+ */
+enum Type
+{
+ BEGIN, ///< The text is aligned to the @p begin angle of the arc (or to the @p begin+increment if it's a RTL text).
+ CENTER, ///< The text is centered within the arc.
+ END, ///< The text is aligned to the @p begin+increment angle of the arc (or to the @p begin if it's a RTL text).
+};
+
+} // namespace CircularAlignment
+
+const float TO_POINT_26_DOT_6 = 64.f;
+const float TO_FLOAT = 1.f / 255.f;
+const float TO_UCHAR = 255.f;
+const bool RTL = true;
+const float TWO_PI = 2.f * Dali::Math::PI; ///< 360 degrees in radians
+const float RAD_135 = Math::PI_2 + Math::PI_4; ///< 135 degrees in radians;
+const float RAD_225 = RAD_135 + Math::PI_2; ///< 225 degrees in radians;
+const float RAD_270 = 3.f * Math::PI_2; ///< 270 degrees in radians;
+const float RAD_315 = RAD_225 + Math::PI_2; ///< 315 degrees in radians;
+
+DALI_ENUM_TO_STRING_TABLE_BEGIN( LAYOUT_TYPE )
+DALI_ENUM_TO_STRING_WITH_SCOPE( DevelText::Layout, SINGLELINE )
+DALI_ENUM_TO_STRING_WITH_SCOPE( DevelText::Layout, MULTILINE )
+DALI_ENUM_TO_STRING_WITH_SCOPE( DevelText::Layout, CIRCULAR )
+DALI_ENUM_TO_STRING_TABLE_END( LAYOUT_TYPE )
+
+DALI_ENUM_TO_STRING_TABLE_BEGIN( CIRCULAR_ALIGNMENT_TYPE )
+DALI_ENUM_TO_STRING_WITH_SCOPE( DevelText::CircularAlignment, BEGIN )
+DALI_ENUM_TO_STRING_WITH_SCOPE( DevelText::CircularAlignment, CENTER )
+DALI_ENUM_TO_STRING_WITH_SCOPE( DevelText::CircularAlignment, END )
+DALI_ENUM_TO_STRING_TABLE_END( CIRCULAR_ALIGNMENT_TYPE )
+
+bool GetLayoutEnumeration(const Property::Value& propertyValue, DevelText::Layout::Type& layout)
+{
+ return Scripting::GetEnumerationProperty(propertyValue, LAYOUT_TYPE_TABLE, LAYOUT_TYPE_TABLE_COUNT, layout);
+}
+
+bool GetCircularAlignmentEnumeration(const Property::Value& propertyValue, DevelText::CircularAlignment::Type& circularAlignment)
+{
+ return Scripting::GetEnumerationProperty(propertyValue, CIRCULAR_ALIGNMENT_TYPE_TABLE, CIRCULAR_ALIGNMENT_TYPE_TABLE_COUNT, circularAlignment);
+}
+
+Devel::PixelBuffer Render( const RendererParameters& textParameters, Vector<EmbeddedItemInfo>& embeddedItemLayout )
+{
+ if( textParameters.text.empty() )
+ {
+ Dali::Devel::PixelBuffer pixelBuffer = Dali::Devel::PixelBuffer::New( textParameters.textWidth,
+ textParameters.textHeight,
+ Dali::Pixel::RGBA8888 );
+
+ const unsigned int bufferSize = textParameters.textWidth * textParameters.textHeight * Dali::Pixel::GetBytesPerPixel(Dali::Pixel::RGBA8888);
+ unsigned char* buffer = pixelBuffer.GetBuffer();
+ memset(buffer, 0, bufferSize);
+
+ return pixelBuffer;
+ }
+
+ MultilanguageSupport multilanguageSupport = MultilanguageSupport::Get();
+ FontClient fontClient = FontClient::Get();
+ MetricsPtr metrics;
+ Text::Layout::Engine layoutEngine; ///< The layout engine.
+ LogicalModelPtr logicalModel = LogicalModel::New(); ///< Pointer to the logical model.
+ VisualModelPtr visualModel = VisualModel::New(); ///< Pointer to the visual model.
+ Vector<ColorBlendingMode> blendingMode; ///< How embedded items and bitmap font glyphs are blended with color text.
+ Vector<bool> isEmoji; ///< Whether the glyph is an emoji.
+
+ // Use this to access FontClient i.e. to get down-scaled Emoji metrics.
+ metrics = Metrics::New( fontClient );
+ layoutEngine.SetMetrics( metrics );
+
+ TextAbstraction::TextRenderer::Parameters rendererParameters( visualModel->mGlyphs,
+ visualModel->mGlyphPositions,
+ visualModel->mColors,
+ visualModel->mColorIndices,
+ blendingMode,
+ isEmoji );
+
+ rendererParameters.width = textParameters.textWidth;
+ rendererParameters.height = textParameters.textHeight;
+ rendererParameters.pixelFormat = TextAbstraction::TextRenderer::Parameters::RGBA8888; // @note: At the moment all textures are generated RGBA8888
+
+ Vector<Character>& utf32Characters = logicalModel->mText; // Characters encoded in utf32.
+ Vector<Character> mirroredUtf32Characters; // The utf32Characters Characters but mirrored if there are RTL text.
+ Vector<LineBreakInfo>& lineBreakInfo = logicalModel->mLineBreakInfo; // The line break info.
+ Vector<ScriptRun>& scripts = logicalModel->mScriptRuns; // Charactes's script.
+ Vector<FontDescriptionRun>& fontDescriptionRuns = logicalModel->mFontDescriptionRuns; // Desired font descriptions.
+ Vector<FontRun>& validFonts = logicalModel->mFontRuns; // Validated fonts.
+ Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo = logicalModel->mBidirectionalParagraphInfo; // The bidirectional info per paragraph.
+ Vector<BidirectionalLineInfoRun>& bidirectionalLineInfo = logicalModel->mBidirectionalLineInfo; // The bidirectional info per line.
+ Vector<CharacterDirection>& directions = logicalModel->mCharacterDirections; // Character's directions.
+ Vector<ColorRun>& colorRuns = logicalModel->mColorRuns; // colors of the text.
+
+ Vector<CharacterIndex>& glyphsToCharacters = visualModel->mGlyphsToCharacters; // Glyphs to character map.
+ Vector<GlyphIndex>& charactersToGlyph = visualModel->mCharactersToGlyph; // Characters to glyphs map.
+ Vector<Length>& charactersPerGlyph = visualModel->mCharactersPerGlyph; // Number of characters per glyph.
+ Vector<Length>& glyphsPerCharacter = visualModel->mGlyphsPerCharacter; // The number of glyphs that are shaped.
+ Vector<LineRun>& lines = visualModel->mLines; // The laid out lines.
+
+ Vector<GlyphIndex> newParagraphGlyphs; // Glyphs for the new paragraph characters.
+
+ // the default font's description.
+ FontDescription defaultFontDescription;
+ PointSize26Dot6 defaultPointSize = FontClient::DEFAULT_POINT_SIZE;
+
+ Length numberOfCharacters = 0u; // The number of characters (not glyphs!).
+ bool isTextMirrored = false; // Whether the text has been mirrored.
+
+ const uint8_t* utf8 = NULL; // pointer to the first character of the text (encoded in utf8)
+ Length textSize = 0u; // The length of the utf8 string.
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Process the markup string if the mark-up processor is enabled.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ MarkupProcessData markupProcessData( colorRuns,
+ fontDescriptionRuns,
+ logicalModel->mEmbeddedItems );
+
+ if (textParameters.markupEnabled)
+ {
+ ProcessMarkupString(textParameters.text, markupProcessData);
+ textSize = markupProcessData.markupProcessedText.size();
+
+ // This is a bit horrible but std::string returns a (signed) char*
+ utf8 = reinterpret_cast<const uint8_t*>(markupProcessData.markupProcessedText.c_str());
+ }
+ else
+ {
+ textSize = textParameters.text.size();
+
+ // This is a bit horrible but std::string returns a (signed) char*
+ utf8 = reinterpret_cast<const uint8_t*>(textParameters.text.c_str());
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Convert from utf8 to utf32
+ ////////////////////////////////////////////////////////////////////////////////
+
+ utf32Characters.Resize(textSize);
+
+ // Transform a text array encoded in utf8 into an array encoded in utf32.
+ // It returns the actual number of characters.
+ numberOfCharacters = Utf8ToUtf32( utf8, textSize, utf32Characters.Begin() );
+ utf32Characters.Resize( numberOfCharacters );
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Retrieve the Line and Word Break Info.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ lineBreakInfo.Resize( numberOfCharacters, LINE_NO_BREAK );
+
+ SetLineBreakInfo( utf32Characters,
+ 0u,
+ numberOfCharacters,
+ lineBreakInfo );
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Retrieve the script runs.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ multilanguageSupport.SetScripts( utf32Characters,
+ 0u,
+ numberOfCharacters,
+ scripts );
+
+ // Check if there are emojis.
+ // If there are an RGBA8888 pixel format is needed.
+ for( const auto& run : scripts )
+ {
+ if( run.script == TextAbstraction::Script::EMOJI )
+ {
+ rendererParameters.pixelFormat = TextAbstraction::TextRenderer::Parameters::RGBA8888;
+ break;
+ }
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Retrieve the font runs.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ // Set the description font run with the given text parameters.
+ FontDescriptionRun fontDescriptionRun;
+ fontDescriptionRun.characterRun.characterIndex = 0u;
+ fontDescriptionRun.characterRun.numberOfCharacters = numberOfCharacters;
+
+ fontDescriptionRun.familyLength = 0u;
+ fontDescriptionRun.familyName = nullptr;
+ fontDescriptionRun.familyDefined = !textParameters.fontFamily.empty();
+ if( fontDescriptionRun.familyDefined )
+ {
+ // The allocated memory will be freed when the logical model is destroyed.
+ fontDescriptionRun.familyLength = textParameters.fontFamily.size();
+ fontDescriptionRun.familyName = new char[fontDescriptionRun.familyLength];
+ memcpy( fontDescriptionRun.familyName, textParameters.fontFamily.c_str(), fontDescriptionRun.familyLength );
+ }
+
+ fontDescriptionRun.weightDefined = !textParameters.fontWeight.empty();
+ if( fontDescriptionRun.weightDefined )
+ {
+ fontDescriptionRun.weight = StringToWeight( textParameters.fontWeight.c_str() );
+ }
+
+ fontDescriptionRun.widthDefined = !textParameters.fontWidth.empty();
+ if( fontDescriptionRun.widthDefined )
+ {
+ fontDescriptionRun.width = StringToWidth( textParameters.fontWidth.c_str() );
+ }
+
+ fontDescriptionRun.slantDefined = !textParameters.fontSlant.empty();
+ if( fontDescriptionRun.slantDefined )
+ {
+ fontDescriptionRun.slant = StringToSlant( textParameters.fontSlant.c_str() );
+ }
+
+ fontDescriptionRun.sizeDefined = !EqualsZero( textParameters.fontSize );
+ if( fontDescriptionRun.sizeDefined )
+ {
+ fontDescriptionRun.size = static_cast<unsigned int>( textParameters.fontSize * TO_POINT_26_DOT_6 );
+ }
+
+ fontDescriptionRuns.PushBack( fontDescriptionRun );
+
+ // Validates the fonts. If there is a character with no assigned font it sets a default one.
+ // After this call, fonts are validated.
+ multilanguageSupport.ValidateFonts( utf32Characters,
+ scripts,
+ fontDescriptionRuns,
+ defaultFontDescription,
+ defaultPointSize,
+ 0u,
+ numberOfCharacters,
+ validFonts );
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Retrieve the Bidirectional info.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ bidirectionalInfo.Reserve( 1u );
+
+ SetBidirectionalInfo( utf32Characters,
+ scripts,
+ lineBreakInfo,
+ 0u,
+ numberOfCharacters,
+ bidirectionalInfo );
+
+ const bool hasBidirectionalText = 0u != bidirectionalInfo.Count();
+ if( hasBidirectionalText )
+ {
+ // Only set the character directions if there is right to left characters.
+ GetCharactersDirection( bidirectionalInfo,
+ numberOfCharacters,
+ 0u,
+ numberOfCharacters,
+ directions );
+
+ // This paragraph has right to left text. Some characters may need to be mirrored.
+ // TODO: consider if the mirrored string can be stored as well.
+
+ isTextMirrored = GetMirroredText( utf32Characters,
+ directions,
+ bidirectionalInfo,
+ 0u,
+ numberOfCharacters,
+ mirroredUtf32Characters );
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Retrieve the glyphs. Text shaping
+ ////////////////////////////////////////////////////////////////////////////////
+
+ const Vector<Character>& textToShape = isTextMirrored ? mirroredUtf32Characters : utf32Characters;
+
+ newParagraphGlyphs.Reserve( 1u );
+
+ // Shapes the text.
+ ShapeText( textToShape,
+ lineBreakInfo,
+ scripts,
+ validFonts,
+ 0u,
+ 0u,
+ numberOfCharacters,
+ rendererParameters.glyphs,
+ glyphsToCharacters,
+ charactersPerGlyph,
+ newParagraphGlyphs );
+
+ // Create the 'number of glyphs' per character and the glyph to character conversion tables.
+ visualModel->CreateGlyphsPerCharacterTable( 0u, 0u, numberOfCharacters );
+ visualModel->CreateCharacterToGlyphTable( 0u, 0u, numberOfCharacters );
+
+ const Length numberOfGlyphs = rendererParameters.glyphs.Count();
+
+ // Once the text has been shaped and the glyphs created it's possible to replace the font id of those glyphs
+ // that represent an image or an item and create the embedded item layout info.
+ // Note: the position of the embedded item can't be set until the text is laid-out.
+ embeddedItemLayout.Reserve( logicalModel->mEmbeddedItems.Count() );
+ for( const auto& item : logicalModel->mEmbeddedItems )
+ {
+ // Get the glyph that matches with the character index.
+ const GlyphIndex glyphIndex = visualModel->mCharactersToGlyph[item.characterIndex];
+ GlyphInfo& glyph = rendererParameters.glyphs[glyphIndex];
+
+ glyph.fontId = 0u;
+ Pixel::Format pixelFormat = Pixel::A8;
+ TextAbstraction::FontClient::EmbeddedItemDescription description = { std::string( item.url, item.urlLength ), item.width, item.height, item.colorBlendingMode };
+ glyph.index = fontClient.CreateEmbeddedItem( description, pixelFormat ); // Set here an index to an item.
+
+ if( ( Pixel::RGBA8888 == pixelFormat ) || ( Pixel::BGRA8888 == pixelFormat ) )
+ {
+ rendererParameters.pixelFormat = TextAbstraction::TextRenderer::Parameters::RGBA8888;
+ }
+
+ // If the url is empty the item is going to be added after the text is rendered. It's needed to store the layout here.
+ if( description.url.empty() )
+ {
+ EmbeddedItemInfo embeddedInfo =
+ {
+ item.characterIndex,
+ glyphIndex,
+ Vector2::ZERO,
+ Size( static_cast<float>( item.width ), static_cast<float>( item.height ) ),
+ Size( static_cast<float>( item.width ), static_cast<float>( item.height ) ),
+ Degree( 0.f ),
+ item.colorBlendingMode
+ };
+
+ embeddedItemLayout.PushBack( embeddedInfo );
+ }
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Retrieve the glyph's metrics.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ metrics->GetGlyphMetrics( rendererParameters.glyphs.Begin(), numberOfGlyphs );
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Set the color runs in glyphs.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ SetColorSegmentationInfo( colorRuns,
+ charactersToGlyph,
+ glyphsPerCharacter,
+ 0u,
+ 0u,
+ numberOfCharacters,
+ visualModel->mColors,
+ visualModel->mColorIndices );
+
+ // Insert the default color at the beginning of the vector.
+ visualModel->mColors.Insert( visualModel->mColors.Begin(),textParameters.textColor );
+
+ // Set how the embedded items are blended with text color.
+ blendingMode.Resize( numberOfGlyphs, textParameters.isTextColorSet ? ColorBlendingMode::MULTIPLY : ColorBlendingMode::NONE );
+
+ if( !textParameters.isTextColorSet )
+ {
+ // Traverse the color runs.
+ for( const auto& run : colorRuns )
+ {
+ const GlyphIndex firstGlyph = visualModel->mCharactersToGlyph[run.characterRun.characterIndex];
+ const CharacterIndex lastCharacter = run.characterRun.characterIndex + run.characterRun.numberOfCharacters - 1u;
+ const GlyphIndex lastGlyphPlusOne = visualModel->mCharactersToGlyph[lastCharacter] + visualModel->mGlyphsPerCharacter[lastCharacter];
+
+ for( GlyphIndex index = firstGlyph; index < lastGlyphPlusOne; ++index )
+ {
+ blendingMode[index] = ColorBlendingMode::MULTIPLY;
+ }
+ }
+ }
+
+ // Traverse the embedded items and update the blending mode vector.
+ for( const auto& item : logicalModel->mEmbeddedItems )
+ {
+ const GlyphIndex glyphIndex = visualModel->mCharactersToGlyph[item.characterIndex];
+ blendingMode[glyphIndex] = item.colorBlendingMode;
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Set the isEmoji Vector
+ ////////////////////////////////////////////////////////////////////////////////
+
+ isEmoji.Resize( numberOfGlyphs, false );
+
+ for( const auto& run : scripts )
+ {
+ if( run.script == TextAbstraction::Script::EMOJI )
+ {
+ const GlyphIndex firstGlyph = visualModel->mCharactersToGlyph[run.characterRun.characterIndex];
+ const CharacterIndex lastCharacter = run.characterRun.characterIndex + run.characterRun.numberOfCharacters - 1u;
+ const GlyphIndex lastGlyphPlusOne = visualModel->mCharactersToGlyph[lastCharacter] + visualModel->mGlyphsPerCharacter[lastCharacter];
+
+ for( GlyphIndex index = firstGlyph; index < lastGlyphPlusOne; ++index )
+ {
+ isEmoji[index] = true;
+ }
+ }
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Layout the text.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ // Sets the alignment
+ HorizontalAlignment::Type horizontalAlignment = Toolkit::HorizontalAlignment::CENTER;
+ HorizontalAlignment::Type horizontalCircularAlignment = Toolkit::HorizontalAlignment::CENTER;
+ VerticalAlignment::Type verticalAlignment = VerticalAlignment::CENTER;
+ Layout::Type layout = Layout::SINGLELINE;
+ CircularAlignment::Type circularAlignment = CircularAlignment::BEGIN;
+
+ Property::Value horizontalAlignmentStr( textParameters.horizontalAlignment );
+ GetHorizontalAlignmentEnumeration( horizontalAlignmentStr, horizontalAlignment );
+ horizontalCircularAlignment = horizontalAlignment;
+
+ Property::Value verticalAlignmentStr( textParameters.verticalAlignment );
+ GetVerticalAlignmentEnumeration( verticalAlignmentStr, verticalAlignment );
+
+ Property::Value layoutStr( textParameters.layout );
+ GetLayoutEnumeration( layoutStr, layout );
+
+ Property::Value circularAlignmentStr( textParameters.circularAlignment );
+ GetCircularAlignmentEnumeration( circularAlignmentStr, circularAlignment );
+
+ // Whether the layout is multi-line.
+ const Text::Layout::Engine::Type horizontalLayout = ( Layout::MULTILINE == layout ) ? Text::Layout::Engine::MULTI_LINE_BOX : Text::Layout::Engine::SINGLE_LINE_BOX;
+ layoutEngine.SetLayout( horizontalLayout ); // TODO: multi-line.
+
+
+ // Whether the layout is circular.
+ const bool isCircularTextLayout = (Layout::CIRCULAR == layout);
+ const bool isClockwise = isCircularTextLayout && ( 0.f < textParameters.incrementAngle );
+
+ // Calculates the max ascender or the max descender.
+ // Is used to calculate the radius of the base line of the text.
+ float maxAscenderDescender = 0.f;
+ if( isCircularTextLayout )
+ {
+ FontId currentFontId = 0u;
+ for( const auto& glyph : rendererParameters.glyphs )
+ {
+ if( currentFontId != glyph.fontId )
+ {
+ currentFontId = glyph.fontId;
+ FontMetrics metrics;
+ fontClient.GetFontMetrics(currentFontId, metrics);
+ maxAscenderDescender = std::max( maxAscenderDescender, isClockwise ? metrics.ascender : metrics.descender );
+ }
+ }
+ }
+ const unsigned int radius = textParameters.radius - static_cast<unsigned int>( maxAscenderDescender );
+
+ // Convert CircularAlignment to HorizontalAlignment.
+ if( isCircularTextLayout )
+ {
+ switch( circularAlignment )
+ {
+ case CircularAlignment::BEGIN:
+ {
+ horizontalCircularAlignment = Toolkit::HorizontalAlignment::BEGIN;
+ break;
+ }
+ case CircularAlignment::CENTER:
+ {
+ horizontalCircularAlignment = Toolkit::HorizontalAlignment::CENTER;
+ break;
+ }
+ case CircularAlignment::END:
+ {
+ horizontalCircularAlignment = Toolkit::HorizontalAlignment::END;
+ break;
+ }
+ }
+ }
+
+ // Set the layout parameters.
+ Size textLayoutArea( static_cast<float>( textParameters.textWidth ),
+ static_cast<float>( textParameters.textHeight ) );
+
+ if( isCircularTextLayout )
+ {
+ // In a circular layout, the length of the text area depends on the radius.
+ rendererParameters.radius = radius;
+ textLayoutArea.width = fabs( Radian( Degree( textParameters.incrementAngle ) ) * static_cast<float>( rendererParameters.radius ) );
+ }
+
+ Text::Layout::Parameters layoutParameters( textLayoutArea,
+ textToShape.Begin(),
+ lineBreakInfo.Begin(),
+ nullptr,
+ ( 0u != directions.Count() ) ? directions.Begin() : nullptr,
+ rendererParameters.glyphs.Begin(),
+ glyphsToCharacters.Begin(),
+ charactersPerGlyph.Begin(),
+ charactersToGlyph.Begin(),
+ glyphsPerCharacter.Begin(),
+ numberOfGlyphs,
+ isCircularTextLayout ? horizontalCircularAlignment : horizontalAlignment,
+ LineWrap::WORD,
+ 0.f,
+ false,
+ false ); // Outline's width
+
+ // Resize the vector of positions to have the same size than the vector of glyphs.
+ rendererParameters.positions.Resize( numberOfGlyphs );
+
+ // Whether the last character is a new paragraph character.
+ layoutParameters.isLastNewParagraph = TextAbstraction::IsNewParagraph( textToShape[numberOfCharacters - 1u] );
+
+ // The initial glyph and the number of glyphs to layout.
+ layoutParameters.startGlyphIndex = 0u;
+ layoutParameters.numberOfGlyphs = numberOfGlyphs;
+ layoutParameters.startLineIndex = 0u;
+ layoutParameters.estimatedNumberOfLines = 1u;
+
+ // Update the visual model.
+ Size newLayoutSize;
+ bool isAutoScrollEnabled = false;
+ layoutEngine.LayoutText( layoutParameters,
+ rendererParameters.positions,
+ lines,
+ newLayoutSize,
+ textParameters.ellipsisEnabled,
+ isAutoScrollEnabled );
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Reorder BiDirectional lines.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ if( hasBidirectionalText )
+ {
+ // Reorder the line.
+ bidirectionalLineInfo.Reserve( 1u );
+
+ ReorderLines( bidirectionalInfo,
+ 0u,
+ numberOfCharacters,
+ lines,
+ bidirectionalLineInfo );
+
+ // Set the bidirectional info per line into the layout parameters.
+ layoutParameters.lineBidirectionalInfoRunsBuffer = bidirectionalLineInfo.Begin();
+ layoutParameters.numberOfBidirectionalInfoRuns = bidirectionalLineInfo.Count();
+
+ // Re-layout the text. Reorder those lines with right to left characters.
+ layoutEngine.ReLayoutRightToLeftLines( layoutParameters,
+ 0u,
+ numberOfCharacters,
+ rendererParameters.positions );
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Align the text.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ // Retrieve the line of text to know the direction and the width. @todo multi-line
+ const LineRun& line = lines[0u];
+
+ if( isCircularTextLayout )
+ {
+ // Set the circular alignment.
+ rendererParameters.circularLayout = isClockwise ? TextRenderer::Parameters::CLOCKWISE : TextRenderer::Parameters::COUNTER_CLOCKWISE;
+
+ // Update the text's height to be used by the ellipsis code.
+ textLayoutArea.height = newLayoutSize.height;
+
+ // Set the size of the text laid out on a straight horizontal line.
+ rendererParameters.circularWidth = static_cast<unsigned int>( newLayoutSize.width );
+ rendererParameters.circularHeight = static_cast<unsigned int>( newLayoutSize.height );
+
+ // Calculate the center of the circular text according the horizontal and vertical alingments and the radius.
+ switch( horizontalAlignment )
+ {
+ case HorizontalAlignment::BEGIN:
+ {
+ rendererParameters.centerX = static_cast<int>(textParameters.radius);
+ break;
+ }
+ case HorizontalAlignment::CENTER:
+ {
+ rendererParameters.centerX = static_cast<int>( textParameters.textWidth / 2u );
+ break;
+ }
+ case HorizontalAlignment::END:
+ {
+ rendererParameters.centerX = static_cast<int>( textParameters.textWidth ) - static_cast<int>(textParameters.radius);
+ break;
+ }
+ }
+
+ switch( verticalAlignment )
+ {
+ case VerticalAlignment::TOP:
+ {
+ rendererParameters.centerY = static_cast<int>(textParameters.radius);
+ break;
+ }
+ case VerticalAlignment::CENTER:
+ {
+ rendererParameters.centerY = static_cast<int>( textParameters.textHeight / 2u );
+ break;
+ }
+ case VerticalAlignment::BOTTOM:
+ {
+ rendererParameters.centerY = static_cast<int>( textParameters.textHeight ) - static_cast<int>(textParameters.radius);
+ break;
+ }
+ }
+
+ // Calculate the beginning angle according with the given horizontal alignment.
+ const bool isRTL = RTL == line.direction;
+
+ CircularAlignment::Type alignment = circularAlignment;
+ if( isRTL )
+ {
+ // Swap the alignment type if the line is right to left.
+ switch( alignment )
+ {
+ case CircularAlignment::BEGIN:
+ {
+ alignment = CircularAlignment::END;
+ break;
+ }
+ case CircularAlignment::CENTER:
+ {
+ // Nothing to do.
+ break;
+ }
+ case CircularAlignment::END:
+ {
+ alignment = CircularAlignment::BEGIN;
+ break;
+ }
+ }
+ }
+
+ float angleOffset = 0.f;
+
+ switch( alignment )
+ {
+ case CircularAlignment::BEGIN:
+ {
+ angleOffset = 0.f;
+ break;
+ }
+ case CircularAlignment::CENTER:
+ {
+ const bool isNeg = textParameters.incrementAngle < 0.f;
+ const float textWidth = static_cast<float>( rendererParameters.circularWidth );
+ angleOffset = ( isNeg ? -0.5f : 0.5f ) * ( textLayoutArea.width - textWidth ) / static_cast<float>( radius );
+ break;
+ }
+ case CircularAlignment::END:
+ {
+ const bool isNeg = textParameters.incrementAngle < 0.f;
+ const float textWidth = static_cast<float>( rendererParameters.circularWidth );
+ angleOffset = ( isNeg ? -1.f : 1.f ) * ( textLayoutArea.width - textWidth ) / static_cast<float>( radius );
+ break;
+ }
+ }
+
+ // Update the beginning angle with the calculated offset.
+ rendererParameters.beginAngle = Radian( Degree( textParameters.beginAngle ) ) + angleOffset;
+
+ // Set the vertical position of the glyphs.
+ for( auto& position : rendererParameters.positions )
+ {
+ position.y = 0.f;
+ }
+ }
+ else
+ {
+ // Calculate the vertical offset according with the given alignment.
+ float penY = 0.f;
+
+ switch( verticalAlignment )
+ {
+ case VerticalAlignment::TOP:
+ {
+ penY = line.ascender;
+ break;
+ }
+ case VerticalAlignment::CENTER:
+ {
+ penY = line.ascender + 0.5f * ( textLayoutArea.height - ( line.ascender - line.descender ) );
+ break;
+ }
+ case VerticalAlignment::BOTTOM:
+ {
+ penY = textLayoutArea.height;
+ break;
+ }
+ }
+
+ // Calculate the horizontal offset according with the given alignment.
+ float alignmentOffset = 0.f;
+ layoutEngine.Align( textLayoutArea,
+ 0u,
+ numberOfCharacters,
+ horizontalAlignment,
+ lines,
+ alignmentOffset,
+ Dali::LayoutDirection::LEFT_TO_RIGHT,
+ false );
+
+ // Update the position of the glyphs with the calculated offsets.
+ for( auto& position : rendererParameters.positions )
+ {
+ position.x += line.alignmentOffset;
+ position.y = penY;
+ }
+ }
+
+ // Cairo adds the bearing to the position of the glyph
+ // that has already been added by the DALi's layout engine,
+ // so it's needed to be removed here.
+ for( unsigned int index = 0u; index < rendererParameters.glyphs.Count(); ++index )
+ {
+ const GlyphInfo& glyph = rendererParameters.glyphs[index];
+ Vector2& position = rendererParameters.positions[index];
+
+ position.x -= glyph.xBearing;
+ }
+
+ // Set the position of the embedded items (if there is any).
+ EmbeddedItemInfo* embeddedItemLayoutBuffer = embeddedItemLayout.Begin();
+
+ auto transformToArc = isClockwise ? &Dali::TextAbstraction::TransformToArcClockwise : &Dali::TextAbstraction::TransformToArcAntiClockwise;
+
+ for( Length index = 0u, endIndex = embeddedItemLayout.Count(); index < endIndex; ++index )
+ {
+ EmbeddedItemInfo& embeddedItem = *( embeddedItemLayoutBuffer + index );
+
+ embeddedItem.position = rendererParameters.positions[embeddedItem.glyphIndex];
+
+ if( isCircularTextLayout )
+ {
+ // Calculate the new position of the embedded item in the circular path.
+
+ // Center of the bitmap.
+ const float halfWidth = 0.5f * embeddedItem.size.width;
+ const float halfHeight = 0.5f * embeddedItem.size.height;
+ double centerX = static_cast<double>( embeddedItem.position.x + halfWidth );
+ double centerY = static_cast<double>(embeddedItem.position.y - halfHeight);
+
+ Dali::TextAbstraction::CircularTextParameters circularTextParameters;
+
+ circularTextParameters.radius = static_cast<double>( radius );
+ circularTextParameters.invRadius = 1.0 / circularTextParameters.radius;
+ circularTextParameters.beginAngle = static_cast<double>( -rendererParameters.beginAngle + Dali::Math::PI_2 );
+ circularTextParameters.centerX = 0.5f * static_cast<double>( textParameters.textWidth );
+ circularTextParameters.centerY = 0.5f * static_cast<double>( textParameters.textHeight );
+
+ // Calculate the rotation angle.
+ float radians = rendererParameters.beginAngle;
+ if( isClockwise )
+ {
+ radians += static_cast<float>( circularTextParameters.invRadius * centerX );
+ radians = -radians;
+ }
+ else
+ {
+ radians -= static_cast<float>( circularTextParameters.invRadius * centerX );
+ radians = -radians + Dali::Math::PI;
+ }
+ embeddedItem.angle = Degree( Radian( radians ) );
+
+ transformToArc( circularTextParameters, centerX, centerY );
+
+ // Recalculate the size of the embedded item after the rotation to position it correctly.
+ float width = embeddedItem.size.width;
+ float height = embeddedItem.size.height;
+
+ // Transform the input angle into the range [0..2PI]
+ radians = fmod( radians, TWO_PI );
+ radians += ( radians < 0.f ) ? TWO_PI : 0.f;
+
+ // Does the same operations than rotate by shear.
+ if( ( radians > Math::PI_4 ) && ( radians <= RAD_135 ) )
+ {
+ std::swap( width, height );
+ radians -= Math::PI_2;
+ }
+ else if( ( radians > RAD_135 ) && ( radians <= RAD_225 ) )
+ {
+ radians -= Math::PI;
+ }
+ else if( ( radians > RAD_225 ) && ( radians <= RAD_315 ) )
+ {
+ std::swap( width, height );
+ radians -= RAD_270;
+ }
+
+ if( fabs( radians ) > Dali::Math::MACHINE_EPSILON_10 )
+ {
+ const float angleSinus = fabs( sin( radians ) );
+ const float angleCosinus = cos( radians );
+
+ // Calculate the rotated image dimensions.
+ embeddedItem.rotatedSize.height = width * angleSinus + height * angleCosinus;
+ embeddedItem.rotatedSize.width = height * angleSinus + width * angleCosinus + 1.f;
+ }
+
+ embeddedItem.position.x = floor( static_cast<float>( centerX ) - 0.5f * embeddedItem.rotatedSize.width );
+ embeddedItem.position.y = floor( static_cast<float>( centerY ) - 0.5f * embeddedItem.rotatedSize.height );
+ }
+ else
+ {
+ embeddedItem.position.y -= embeddedItem.size.height;
+ }
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Ellipsis the text.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ if( textParameters.ellipsisEnabled )
+ {
+ const LineRun& line = lines[0u]; // TODO: multi-line
+
+ if( line.ellipsis )
+ {
+ Length finalNumberOfGlyphs = 0u;
+
+ if( ( line.ascender - line.descender ) > textLayoutArea.height )
+ {
+ // The height of the line is bigger than the height of the text area.
+ // Show the ellipsis glyph even if it doesn't fit in the text area.
+ // If no text is rendered then issues are rised and it may be a while
+ // until is find out that the text area is too small.
+
+ // Get the first glyph which is going to be replaced and the ellipsis glyph.
+ GlyphInfo& glyphInfo = rendererParameters.glyphs[0u];
+ const GlyphInfo& ellipsisGlyph = fontClient.GetEllipsisGlyph( fontClient.GetPointSize( glyphInfo.fontId ) );
+
+ // Change the 'x' and 'y' position of the ellipsis glyph.
+ Vector2& position = rendererParameters.positions[0u];
+ position.x = ellipsisGlyph.xBearing;
+ position.y = textLayoutArea.height - ellipsisGlyph.yBearing;
+
+ // Replace the glyph by the ellipsis glyph.
+ glyphInfo = ellipsisGlyph;
+
+ // Set the final number of glyphs
+ finalNumberOfGlyphs = 1u;
+ }
+ else
+ {
+
+ // firstPenX, penY and firstPenSet are used to position the ellipsis glyph if needed.
+ float firstPenX = 0.f; // Used if rtl text is elided.
+ bool firstPenSet = false;
+
+ // Add the ellipsis glyph.
+ bool inserted = false;
+ float removedGlypsWidth = 0.f;
+ Length numberOfRemovedGlyphs = 0u;
+ if (line.glyphRun.numberOfGlyphs > 0u)
+ {
+ GlyphIndex index = line.glyphRun.numberOfGlyphs - 1u;
+
+ GlyphInfo* glyphs = rendererParameters.glyphs.Begin();
+ Vector2* glyphPositions = rendererParameters.positions.Begin();
+
+ float penY = 0.f;
+
+ // The ellipsis glyph has to fit in the place where the last glyph(s) is(are) removed.
+ while( !inserted )
+ {
+ const GlyphInfo& glyphToRemove = *( glyphs + index );
+
+ if( 0u != glyphToRemove.fontId )
+ {
+ // i.e. The font id of the glyph shaped from the '\n' character is zero.
+
+ // Need to reshape the glyph as the font may be different in size.
+ const GlyphInfo& ellipsisGlyph = fontClient.GetEllipsisGlyph( fontClient.GetPointSize( glyphToRemove.fontId ) );
+
+ if( !firstPenSet )
+ {
+ const Vector2& position = *( glyphPositions + index );
+
+ // Calculates the penY of the current line. It will be used to position the ellipsis glyph.
+ penY = position.y;
+
+ // Calculates the first penX which will be used if rtl text is elided.
+ firstPenX = position.x - glyphToRemove.xBearing;
+ if( firstPenX < -ellipsisGlyph.xBearing )
+ {
+ // Avoids to exceed the bounding box when rtl text is elided.
+ firstPenX = -ellipsisGlyph.xBearing;
+ }
+
+ removedGlypsWidth = -ellipsisGlyph.xBearing;
+
+ firstPenSet = true;
+ }
+
+ removedGlypsWidth += std::min( glyphToRemove.advance, ( glyphToRemove.xBearing + glyphToRemove.width ) );
+
+ // Calculate the width of the ellipsis glyph and check if it fits.
+ const float ellipsisGlyphWidth = ellipsisGlyph.width + ellipsisGlyph.xBearing;
+ if( ellipsisGlyphWidth < removedGlypsWidth )
+ {
+ GlyphInfo& glyphInfo = *( glyphs + index );
+ Vector2& position = *( glyphPositions + index );
+ position.x -= ( 0.f > glyphInfo.xBearing ) ? glyphInfo.xBearing : 0.f;
+
+ // Replace the glyph by the ellipsis glyph.
+ glyphInfo = ellipsisGlyph;
+
+ // Update the isEmoji vector
+ isEmoji[index] = false;
+
+ // Change the 'x' and 'y' position of the ellipsis glyph.
+
+ if( position.x > firstPenX )
+ {
+ position.x = firstPenX + removedGlypsWidth - ellipsisGlyphWidth;
+ }
+
+ position.x += ellipsisGlyph.xBearing;
+ position.y = penY;
+
+ inserted = true;
+ }
+ }
+
+ if( !inserted )
+ {
+ if( index > 0u )
+ {
+ --index;
+ }
+ else
+ {
+ // No space for the ellipsis.
+ inserted = true;
+ }
+ ++numberOfRemovedGlyphs;
+ }
+
+ // Set the final number of glyphs
+ finalNumberOfGlyphs = line.glyphRun.numberOfGlyphs - numberOfRemovedGlyphs;
+ }
+ }
+
+ // Resize the number of glyphs/positions
+ rendererParameters.glyphs.Resize( finalNumberOfGlyphs );
+ rendererParameters.positions.Resize( finalNumberOfGlyphs );
+
+ // Remove from the embedded items those exceding the last laid out glyph.
+ embeddedItemLayout.Erase( std::remove_if( embeddedItemLayout.Begin(),
+ embeddedItemLayout.End(),
+ [finalNumberOfGlyphs]( const EmbeddedItemInfo& item )
+ {
+ return item.glyphIndex >= finalNumberOfGlyphs;
+ } ),
+ embeddedItemLayout.End() );
+ }
+ }
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // Render the text.
+ ////////////////////////////////////////////////////////////////////////////////
+
+ rendererParameters.width = textParameters.textWidth;
+ rendererParameters.height = textParameters.textHeight;
+
+ TextAbstraction::TextRenderer renderer = TextAbstraction::TextRenderer::Get();
+ return renderer.Render( rendererParameters );
+}
+
+Devel::PixelBuffer CreateShadow( const ShadowParameters& shadowParameters )
+{
+ // The size of the pixel data.
+ const int width = static_cast<int>(shadowParameters.input.GetWidth());
+ const int height = static_cast<int>(shadowParameters.input.GetHeight());
+
+ // The shadow's offset.
+ const int xOffset = static_cast<int>( shadowParameters.offset.x );
+ const int yOffset = static_cast<int>( shadowParameters.offset.y );
+
+ // The size in bytes of the pixel of the input's buffer.
+ const Pixel::Format inputFormat = shadowParameters.input.GetPixelFormat();
+ const unsigned int inputPixelSize = Pixel::GetBytesPerPixel( inputFormat );
+ const bool isA8 = Pixel::A8 == inputFormat;
+
+ // Creates the output pixel buffer.
+ Devel::PixelBuffer outputPixelBuffer = Devel::PixelBuffer::New(width, height, Pixel::RGBA8888);
+
+ // Clear the output buffer
+ unsigned char* outputPixelBufferPtr = outputPixelBuffer.GetBuffer();
+ memset(outputPixelBufferPtr, 0, width * height * Pixel::GetBytesPerPixel(Pixel::RGBA8888));
+
+ // Gets the buffer of the input pixel buffer.
+ const unsigned char* const inputPixelBuffer = shadowParameters.input.GetBuffer();
+
+ float textColor[4u];
+ if (isA8)
+ {
+ memcpy(textColor, shadowParameters.textColor.AsFloat(), 4u * sizeof(float));
+ }
+ const float* const shadowColor = shadowParameters.color.AsFloat();
+
+ // Traverse the input pixel buffer and write the text on the foreground and the shadow on the background.
+ for (int rowIndex = 0; rowIndex < height; ++rowIndex)
+ {
+ // Calculates the rowIndex to the input pixel buffer for the shadow and whether it's within the boundaries.
+ const int yOffsetIndex = rowIndex - yOffset;
+ const bool isValidRowIndex = ((yOffsetIndex >= 0) && (yOffsetIndex < height));
+
+ const int rows = rowIndex * width;
+ const int offsetRows = yOffsetIndex * width;
+ for (int columnIndex = 0; columnIndex < width; ++columnIndex)
+ {
+ // Index to the input buffer to retrieve the alpha value of the foreground text.
+ const unsigned int index = inputPixelSize * static_cast<unsigned int>(rows + columnIndex);
+
+ // Build the index to the input buffer to retrieve the alpha value of the background shadow.
+ unsigned int shadowIndex = 0u;
+ bool isValidShadowIndex = false;
+ if (isValidRowIndex)
+ {
+ const int xOffsetIndex = columnIndex - xOffset;
+ isValidShadowIndex = ((xOffsetIndex >= 0) && (xOffsetIndex < width));
+
+ if (isValidShadowIndex)
+ {
+ shadowIndex = inputPixelSize * static_cast<unsigned int>(offsetRows + xOffsetIndex);
+ }
+ }
+
+ // If the input buffer is an alpha mask, retrieve the values for the foreground text and the background shadow.
+ // If not retrieve the color.
+ float inputShadowOffsetAlphaValue = 1.f;
+ float inputAlphaValue = 1.f;
+ if (isA8)
+ {
+ // Retrieve the alpha value for the shadow.
+ inputShadowOffsetAlphaValue = isValidShadowIndex ? (static_cast<float>(*(inputPixelBuffer + shadowIndex)) / 255.f) : 0.f;
+
+ // Retrieve the alpha value for the text.
+ inputAlphaValue = static_cast<float>(*(inputPixelBuffer + index)) / 255.f;
+ }
+ else
+ {
+ // The input buffer is not an alpha mask. Retrieve the color.
+ textColor[0u] = TO_FLOAT * static_cast<float>( *(inputPixelBuffer + index + 0u) );
+ textColor[1u] = TO_FLOAT * static_cast<float>( *(inputPixelBuffer + index + 1u) );
+ textColor[2u] = TO_FLOAT * static_cast<float>( *(inputPixelBuffer + index + 2u) );
+ textColor[3u] = TO_FLOAT * static_cast<float>( *(inputPixelBuffer + index + 3u) );
+ inputAlphaValue = textColor[3u];
+ inputShadowOffsetAlphaValue = isValidShadowIndex ? TO_FLOAT * static_cast<float>( *(inputPixelBuffer + shadowIndex + 3u) ) : 0.f;
+ }
+
+ // Build the output color.
+ float outputColor[4u];
+
+ if( shadowParameters.blendShadow )
+ {
+ // Blend the shadow's color with the text's color on top
+ const float textAlpha = textColor[3u] * inputAlphaValue;
+ const float shadowAlpha = shadowColor[3u] * inputShadowOffsetAlphaValue;
+
+ // Blends the alpha.
+ outputColor[3u] = 1.f - ((1.f - textAlpha) * (1.f - shadowAlpha));
+ const bool isOutputAlphaZero = outputColor[3u] < Dali::Math::MACHINE_EPSILON_1000;
+ if( isOutputAlphaZero )
+ {
+ std::fill( outputColor, outputColor + 4u, 0.f );
+ }
+ else
+ {
+ // Blends the RGB components.
+ float shadowComponent = 0.f;
+ float textComponent = 0.f;
+
+ shadowComponent = shadowColor[0u] * inputShadowOffsetAlphaValue;
+ textComponent = textColor[0u] * inputAlphaValue;
+ outputColor[0u] = (textComponent * textAlpha / outputColor[3u]) + (shadowComponent * shadowAlpha * (1.f - textAlpha) / outputColor[3u]);
+
+ shadowComponent = shadowColor[1u] * inputShadowOffsetAlphaValue;
+ textComponent = textColor[1u] * inputAlphaValue;
+ outputColor[1u] = (textComponent * textAlpha / outputColor[3u]) + (shadowComponent * shadowAlpha * (1.f - textAlpha) / outputColor[3u]);
+
+ shadowComponent = shadowColor[2u] * inputShadowOffsetAlphaValue;
+ textComponent = textColor[2u] * inputAlphaValue;
+ outputColor[2u] = (textComponent * textAlpha / outputColor[3u]) + (shadowComponent * shadowAlpha * (1.f - textAlpha) / outputColor[3u]);
+ }
+ }
+ else
+ {
+ // No blending!!!
+ std::fill( outputColor, outputColor + 4u, 0.f );
+
+ const float textAlpha = textColor[3u];
+ const float shadowAlpha = shadowColor[3u] * inputShadowOffsetAlphaValue;
+
+ // Write shadow first.
+ if( shadowAlpha > Dali::Math::MACHINE_EPSILON_1000 )
+ {
+ outputColor[0u] = shadowColor[0u] * inputShadowOffsetAlphaValue;
+ outputColor[1u] = shadowColor[1u] * inputShadowOffsetAlphaValue;
+ outputColor[2u] = shadowColor[2u] * inputShadowOffsetAlphaValue;
+ outputColor[3u] = shadowAlpha;
+ }
+
+ // Write character on top.
+ if( textAlpha > Dali::Math::MACHINE_EPSILON_1000 )
+ {
+ outputColor[0u] = textColor[0u];
+ outputColor[1u] = textColor[1u];
+ outputColor[2u] = textColor[2u];
+ outputColor[3u] = textAlpha;
+ }
+ }
+
+ // Write the color into the output pixel buffer.
+ const unsigned int outputIndex = 4u * (rows + columnIndex);
+ *(outputPixelBufferPtr + outputIndex + 0u) = static_cast<unsigned char>( TO_UCHAR * outputColor[0u] );
+ *(outputPixelBufferPtr + outputIndex + 1u) = static_cast<unsigned char>( TO_UCHAR * outputColor[1u] );
+ *(outputPixelBufferPtr + outputIndex + 2u) = static_cast<unsigned char>( TO_UCHAR * outputColor[2u] );
+ *(outputPixelBufferPtr + outputIndex + 3u) = static_cast<unsigned char>( TO_UCHAR * outputColor[3u] );
+ }
+ }
+
+ // Returns the pixel buffer.
+ return outputPixelBuffer;
+}
+
+Devel::PixelBuffer ConvertToRgba8888(Devel::PixelBuffer pixelBuffer, const Vector4& color, bool multiplyByAlpha)
+{
+ if (Dali::Pixel::A8 != pixelBuffer.GetPixelFormat())
+ {
+ // Does nothing.
+ return pixelBuffer;
+ }
+
+ const unsigned int width = pixelBuffer.GetWidth();
+ const unsigned int height = pixelBuffer.GetHeight();
+ Devel::PixelBuffer newPixelBuffer = Devel::PixelBuffer::New( width, height, Dali::Pixel::RGBA8888 );
+
+ unsigned char* dstBuffer = newPixelBuffer.GetBuffer();
+ const unsigned char* const srcBuffer = pixelBuffer.GetBuffer();
+
+ const unsigned char r = static_cast<unsigned char>( TO_UCHAR * color.r );
+ const unsigned char g = static_cast<unsigned char>( TO_UCHAR * color.g );
+ const unsigned char b = static_cast<unsigned char>( TO_UCHAR * color.b );
+
+ unsigned char dstColor[4];
+ for( unsigned int j = 0u; j < height; ++j )
+ {
+ const unsigned int lineIndex = j * width;
+ for( unsigned int i=0u; i < width; ++i )
+ {
+ const unsigned int srcIndex = lineIndex + i;
+
+ const float srcAlpha = static_cast<float>( *( srcBuffer + srcIndex ) );
+
+ if( multiplyByAlpha )
+ {
+ dstColor[0u] = static_cast<unsigned char>( srcAlpha * color.r );
+ dstColor[1u] = static_cast<unsigned char>( srcAlpha * color.g );
+ dstColor[2u] = static_cast<unsigned char>( srcAlpha * color.b );
+ dstColor[3u] = static_cast<unsigned char>( srcAlpha * color.a );
+ }
+ else
+ {
+ dstColor[0u] = r;
+ dstColor[1u] = g;
+ dstColor[2u] = b;
+ dstColor[3u] = static_cast<unsigned char>( srcAlpha );
+ }
+
+ const unsigned int dstIndex = srcIndex * 4u;
+ memcpy( dstBuffer + dstIndex, dstColor, 4u );
+ }
+ }
+
+ return newPixelBuffer;
+}
+
+void UpdateBuffer(Devel::PixelBuffer src, Devel::PixelBuffer dst, unsigned int x, unsigned int y, bool blend)
+{
+ const Dali::Pixel::Format pixelFormat = dst.GetPixelFormat();
+ if( src.GetPixelFormat() != pixelFormat )
+ {
+ DALI_LOG_ERROR("PixelBuffer::SetBuffer. The pixel format of the new data must be the same of the current pixel buffer.");
+ return;
+ }
+
+ const unsigned int srcWidth = src.GetWidth();
+ const unsigned int srcHeight = src.GetHeight();
+ const unsigned int dstWidth = dst.GetWidth();
+ const unsigned int dstHeight = dst.GetHeight();
+
+ if( ( x > dstWidth ) ||
+ ( y > dstHeight ) ||
+ ( x + srcWidth > dstWidth ) ||
+ ( y + srcHeight > dstHeight ) )
+ {
+ DALI_LOG_ERROR("PixelBuffer::SetBuffer. The source pixel buffer is out of the boundaries of the destination pixel buffer.");
+ return;
+ }
+
+ const unsigned int bytesPerPixel = Dali::Pixel::GetBytesPerPixel(pixelFormat);
+ const unsigned int alphaIndex = bytesPerPixel - 1u;
+
+ const unsigned char* const srcBuffer = src.GetBuffer();
+ unsigned char* dstBuffer = dst.GetBuffer();
+
+ if( !blend )
+ {
+ const unsigned int currentLineSize = dstWidth * bytesPerPixel;
+ const unsigned int newLineSize = srcWidth * bytesPerPixel;
+ unsigned char* currentBuffer = dstBuffer + (y * dstWidth + x) * bytesPerPixel;
+ for (unsigned int j = 0u; j < srcHeight; ++j)
+ {
+ memcpy(currentBuffer + j * currentLineSize, srcBuffer + j * newLineSize, newLineSize);
+ }
+ }
+ else
+ {
+ float outputColor[4u];
+
+ // Blend the src pixel buffer with the dst pixel buffer as background.
+ //
+ // fgColor, fgAlpha, bgColor, bgAlpha
+ //
+ // alpha = 1 - ( 1 - fgAlpha ) * ( 1 - bgAlpha )
+ // color = ( fgColor * fgAlpha / alpha ) + ( bgColor * bgAlpha * ( 1 - fgAlpha ) / alpha )
+
+ // Jump till the 'x,y' position
+ const unsigned int dstWidthBytes = dstWidth * bytesPerPixel;
+ dstBuffer += ( y * dstWidthBytes + x * bytesPerPixel );
+
+ for (unsigned int j = 0u; j < srcHeight; ++j)
+ {
+ const unsigned int srcLineIndex = j * srcWidth;
+ for (unsigned int i = 0u; i < srcWidth; ++i)
+ {
+ const float srcAlpha = TO_FLOAT * static_cast<float>( *( srcBuffer + bytesPerPixel * ( srcLineIndex + i ) + alphaIndex ) );
+ const float dstAlpha = TO_FLOAT * static_cast<float>( *(dstBuffer + i*bytesPerPixel + alphaIndex) );
+
+ // Blends the alpha channel.
+ const float oneMinusSrcAlpha = 1.f - srcAlpha;
+ outputColor[alphaIndex] = 1.f - (oneMinusSrcAlpha * (1.f - dstAlpha));
+
+ // Blends the RGB channels.
+ const bool isOutputAlphaZero = outputColor[alphaIndex] < Dali::Math::MACHINE_EPSILON_1000;
+ if( isOutputAlphaZero )
+ {
+ std::fill( outputColor, outputColor + bytesPerPixel, 0.f );
+ }
+ else
+ {
+ const float srcAlphaOverOutputAlpha = srcAlpha / outputColor[alphaIndex]; // fgAlpha / alpha
+ const float dstAlphaOneMinusSrcAlphaOverOutputAlpha = dstAlpha * oneMinusSrcAlpha / outputColor[alphaIndex]; // bgAlpha * ( 1 - fgAlpha ) / alpha
+ for (unsigned int index = 0u; index < alphaIndex; ++index)
+ {
+ const float dstComponent = TO_FLOAT * static_cast<float>( *( dstBuffer + i * bytesPerPixel + index ) ) * dstAlpha;
+ const float srcComponent = TO_FLOAT * static_cast<float>(*(srcBuffer + bytesPerPixel * (srcLineIndex + i) + index) ) * srcAlpha;
+ outputColor[index] = ( srcComponent * srcAlphaOverOutputAlpha ) + ( dstComponent * dstAlphaOneMinusSrcAlphaOverOutputAlpha );
+ }
+ }
+
+ for (unsigned int index = 0u; index < bytesPerPixel; ++index)
+ {
+ *(dstBuffer + i * bytesPerPixel + index) = static_cast<unsigned char>( TO_UCHAR * outputColor[index] );
+ }
+ }
+
+ dstBuffer += dstWidthBytes;
+ }
+ }
+}
+
+} // namespace DevelText
+
+} // namespace Toolkit
+
+} // namespace Dali
projects / platform / core / uifw / dali-toolkit.git / commitdiff