// INTERNAL INCLUDES
#include <singleton-service-impl.h>
+#include <dali/devel-api/text-abstraction/font-client.h>
+#include <dali/devel-api/text-abstraction/glyph-info.h>
+#include <dali/integration-api/debug.h>
+
+// EXTERNAL INCLUDES
+#include <harfbuzz/hb.h>
+#include <harfbuzz/hb-ft.h>
+
+#include <ft2build.h>
+#include <iostream>
+
+namespace
+{
+
+const static uint8_t U2 = 2u;
+const static uint8_t U3 = 3u;
+const static uint8_t U4 = 4u;
+
+uint32_t GetNumberOfUtf8Bytes( const uint32_t* const utf32, uint32_t numberOfCharacters )
+{
+ uint32_t numberOfBytes = 0u;
+
+ const uint32_t* begin = utf32;
+ const uint32_t* end = utf32 + numberOfCharacters;
+
+ for( ; begin < end; ++begin )
+ {
+ const uint32_t code = *begin;
+
+ if( code < 0x80u )
+ {
+ ++numberOfBytes;
+ }
+ else if( code < 0x800u )
+ {
+ numberOfBytes += U2;
+ }
+ else if( code < 0x10000u )
+ {
+ numberOfBytes += U3;
+ }
+ else if( code < 0x200000u )
+ {
+ numberOfBytes += U4;
+ }
+ }
+
+ return numberOfBytes;
+}
+
+uint32_t Utf32ToUtf8( const uint32_t* const utf32, uint32_t numberOfCharacters, uint8_t* utf8 )
+{
+ const uint32_t* begin = utf32;
+ const uint32_t* end = utf32 + numberOfCharacters;
+
+ uint8_t* utf8Begin = utf8;
+
+ for( ; begin < end; ++begin )
+ {
+ const uint32_t code = *begin;
+
+ if( code < 0x80u )
+ {
+ *utf8++ = code;
+ }
+ else if( code < 0x800u )
+ {
+ *utf8++ = static_cast<uint8_t>( code >> 6u ) | 0xc0u; // lead byte for 2 byte sequence
+ *utf8++ = static_cast<uint8_t>( code & 0x3f ) | 0x80u; // continuation byte
+ }
+ else if( code < 0x10000u )
+ {
+ *utf8++ = static_cast<uint8_t>( code >> 12u ) | 0xe0u; // lead byte for 2 byte sequence
+ *utf8++ = static_cast<uint8_t>( ( code >> 6u ) & 0x3f ) | 0x80u; // continuation byte
+ *utf8++ = static_cast<uint8_t>( code & 0x3f ) | 0x80u; // continuation byte
+ }
+ else if( code < 0x200000u )
+ {
+ *utf8++ = static_cast<uint8_t>( code >> 18u ) | 0xf0u; // lead byte for 2 byte sequence
+ *utf8++ = static_cast<uint8_t>( ( code >> 12u ) & 0x3f ) | 0x80u; // continuation byte
+ *utf8++ = static_cast<uint8_t>( ( code >> 6u ) & 0x3f ) | 0x80u; // continuation byte
+ *utf8++ = static_cast<uint8_t>( code & 0x3f ) | 0x80u; // continuation byte
+ }
+ }
+
+ return utf8 - utf8Begin;
+}
+
+void Utf32ToUtf8( const uint32_t* const utf32, uint32_t numberOfCharacters, std::string& utf8 )
+{
+ utf8.clear();
+
+ uint32_t numberOfBytes = GetNumberOfUtf8Bytes( &utf32[0], numberOfCharacters );
+ utf8.resize( numberOfBytes );
+
+ // This is a bit horrible but std::string returns a (signed) char*
+ Utf32ToUtf8( utf32, numberOfCharacters, reinterpret_cast<uint8_t*>(&utf8[0]) );
+}
+
+}
namespace Dali
{
namespace Internal
{
+const char* DEFAULT_LANGUAGE = "en";
+const unsigned int DEFAULT_LANGUAGE_LENGTH = 2u;
+const float FROM_266 = 1.0f / 64.0f;
+
+const hb_script_t SCRIPT_TO_HARFBUZZ[] =
+{
+ HB_SCRIPT_COMMON,
+
+ HB_SCRIPT_COMMON, // ASCII_DIGITS
+ HB_SCRIPT_COMMON, // ASCII_PS
+
+ HB_SCRIPT_COMMON, // C1_CONTROLS
+ HB_SCRIPT_COMMON, // C1_PS
+ HB_SCRIPT_COMMON, // C1_MATH
+ HB_SCRIPT_COMMON, // SML_P
+ HB_SCRIPT_COMMON, // PHONETIC_U
+ HB_SCRIPT_COMMON, // PHONETIC_SS
+ HB_SCRIPT_COMMON, // NUMERIC_SS
+ HB_SCRIPT_COMMON, // LETTER_LIKE
+ HB_SCRIPT_COMMON, // NUMBER_FORMS
+ HB_SCRIPT_COMMON, // FRACTIONS_NF
+ HB_SCRIPT_COMMON, // NON_LATIN_LED
+ HB_SCRIPT_COMMON, // HWFW_S
+
+ HB_SCRIPT_CYRILLIC,
+ HB_SCRIPT_GREEK,
+ HB_SCRIPT_LATIN,
+
+ HB_SCRIPT_ARABIC,
+ HB_SCRIPT_HEBREW,
+
+ HB_SCRIPT_ARMENIAN,
+ HB_SCRIPT_GEORGIAN,
+
+ HB_SCRIPT_HAN,
+ HB_SCRIPT_HANGUL,
+ HB_SCRIPT_HIRAGANA,
+ HB_SCRIPT_KATAKANA,
+ HB_SCRIPT_BOPOMOFO,
+
+ HB_SCRIPT_BENGALI,
+ HB_SCRIPT_MYANMAR,
+ HB_SCRIPT_DEVANAGARI,
+ HB_SCRIPT_GUJARATI,
+ HB_SCRIPT_GURMUKHI,
+ HB_SCRIPT_KANNADA,
+ HB_SCRIPT_MALAYALAM,
+ HB_SCRIPT_ORIYA,
+ HB_SCRIPT_SINHALA,
+ HB_SCRIPT_TAMIL,
+ HB_SCRIPT_TELUGU,
+
+ HB_SCRIPT_LAO,
+ HB_SCRIPT_THAI,
+ HB_SCRIPT_KHMER,
+ HB_SCRIPT_JAVANESE,
+ HB_SCRIPT_SUNDANESE,
+
+ HB_SCRIPT_ETHIOPIC,
+ HB_SCRIPT_OL_CHIKI,
+ HB_SCRIPT_TAGALOG,
+ HB_SCRIPT_MEETEI_MAYEK,
+
+ HB_SCRIPT_UNKNOWN, // EMOJI
+ HB_SCRIPT_UNKNOWN, // SYMBOLS1
+ HB_SCRIPT_UNKNOWN, // SYMBOLS2
+ HB_SCRIPT_UNKNOWN, // SYMBOLS3
+ HB_SCRIPT_UNKNOWN, // SYMBOLS4
+ HB_SCRIPT_UNKNOWN, // SYMBOLS5
+ HB_SCRIPT_UNKNOWN
+};
+
+struct Shaping::Plugin
+{
+ Plugin()
+ : mFreeTypeLibrary( NULL ),
+ mIndices(),
+ mAdvance(),
+ mCharacterMap(),
+ mFontId( 0u )
+ {
+ }
+
+ ~Plugin()
+ {
+ FT_Done_FreeType( mFreeTypeLibrary );
+ }
+
+ void Initialize()
+ {
+ int error = FT_Init_FreeType( &mFreeTypeLibrary );
+ if( FT_Err_Ok != error )
+ {
+ DALI_LOG_ERROR( "FreeType Init error: %d\n", error );
+ }
+ }
+
+ Length Shape( const Character* const text,
+ Length numberOfCharacters,
+ FontId fontId,
+ Script script )
+ {
+ // Clear previoursly shaped texts.
+ mIndices.Clear();
+ mAdvance.Clear();
+ mCharacterMap.Clear();
+ mOffset.Clear();
+ mFontId = fontId;
+
+ // Reserve some space to avoid reallocations.
+ const Length numberOfGlyphs = static_cast<Length>( 1.3f * static_cast<float>( numberOfCharacters ) );
+ mIndices.Reserve( numberOfGlyphs );
+ mAdvance.Reserve( numberOfGlyphs );
+ mCharacterMap.Reserve( numberOfGlyphs );
+ mOffset.Reserve( 2u * numberOfGlyphs );
+
+ TextAbstraction::FontClient fontClient = TextAbstraction::FontClient::Get();
+
+ // Get the font's path file name from the font Id.
+ FontDescription fontDescription;
+ fontClient.GetDescription( fontId, fontDescription );
+
+ // Create a FreeType font's face.
+ FT_Face face;
+ FT_Error retVal = FT_New_Face( mFreeTypeLibrary, fontDescription.path.c_str(), 0u, &face );
+ if( FT_Err_Ok != retVal )
+ {
+ DALI_LOG_ERROR( "Failed to open face: %s\n", fontDescription.path.c_str() );
+ return 0u;
+ }
+
+ unsigned int horizontalDpi = 0u;
+ unsigned int verticalDpi = 0u;
+ fontClient.GetDpi( horizontalDpi, verticalDpi );
+
+ FT_Set_Char_Size( face,
+ 0u,
+ fontClient.GetPointSize( fontId ),
+ horizontalDpi,
+ verticalDpi );
+
+ /* Get our harfbuzz font struct */
+ hb_font_t* harfBuzzFont;
+ harfBuzzFont = hb_ft_font_create( face, NULL );
+
+ /* Create a buffer for harfbuzz to use */
+ hb_buffer_t* harfBuzzBuffer = hb_buffer_create();
+
+ const bool rtlDirection = IsRightToLeftScript( script );
+ hb_buffer_set_direction( harfBuzzBuffer,
+ rtlDirection ? HB_DIRECTION_RTL : HB_DIRECTION_LTR ); /* or LTR */
+
+ hb_buffer_set_script( harfBuzzBuffer,
+ SCRIPT_TO_HARFBUZZ[ script ] ); /* see hb-unicode.h */
+
+
+ char* currentLocale = setlocale(LC_MESSAGES,NULL);
+
+ std::istringstream stringStream( currentLocale );
+ std::string localeString;
+ std::getline(stringStream, localeString, '_');
+ hb_buffer_set_language( harfBuzzBuffer, hb_language_from_string( localeString.c_str(), localeString.size() ) );
+
+ /* Layout the text */
+ hb_buffer_add_utf32( harfBuzzBuffer, text, numberOfCharacters, 0u, numberOfCharacters );
+
+ hb_shape( harfBuzzFont, harfBuzzBuffer, NULL, 0u );
+
+ std::string currentText;
+ Utf32ToUtf8( text, numberOfCharacters, currentText );
+
+ DALI_LOG_RELEASE_INFO( "Shape: currentText: %s, font: %s, pointSize: %d\n", currentText.c_str(), fontDescription.path.c_str(), static_cast<int>( fontClient.GetPointSize( fontId ) * FROM_266 ) );
+
+ /* Get glyph data */
+ unsigned int glyphCount;
+ hb_glyph_info_t* glyphInfo = hb_buffer_get_glyph_infos( harfBuzzBuffer, &glyphCount );
+ hb_glyph_position_t *glyphPositions = hb_buffer_get_glyph_positions( harfBuzzBuffer, &glyphCount );
+ const GlyphIndex lastGlyphIndex = glyphCount - 1u;
+ for( GlyphIndex i = 0u; i < glyphCount; )
+ {
+ if( rtlDirection )
+ {
+ // If the direction is right to left, Harfbuzz retrieves the glyphs in the visual order.
+ // The glyphs are needed in the logical order to layout the text in lines.
+ // Do not change the order of the glyphs if they belong to the same cluster.
+ GlyphIndex rtlIndex = lastGlyphIndex - i;
+
+ unsigned int cluster = glyphInfo[rtlIndex].cluster;
+ unsigned int previousCluster = cluster;
+ Length numberOfGlyphsInCluster = 0u;
+
+ while( ( cluster == previousCluster ) )
+ {
+ ++numberOfGlyphsInCluster;
+ previousCluster = cluster;
+
+ if( rtlIndex > 0u )
+ {
+ --rtlIndex;
+
+ cluster = glyphInfo[rtlIndex].cluster;
+ }
+ else
+ {
+ break;
+ }
+ }
+
+ rtlIndex = lastGlyphIndex - ( i + ( numberOfGlyphsInCluster - 1u ) );
+
+ for( GlyphIndex j = 0u; j < numberOfGlyphsInCluster; ++j )
+ {
+ const GlyphIndex index = rtlIndex + j;
+
+ mIndices.PushBack( glyphInfo[index].codepoint );
+ mAdvance.PushBack( floor( glyphPositions[index].x_advance * FROM_266 ) );
+ mCharacterMap.PushBack( glyphInfo[index].cluster );
+ mOffset.PushBack( floor( glyphPositions[index].x_offset * FROM_266 ) );
+ mOffset.PushBack( floor( glyphPositions[index].y_offset * FROM_266 ) );
+ }
+
+ i += numberOfGlyphsInCluster;
+ }
+ else
+ {
+ mIndices.PushBack( glyphInfo[i].codepoint );
+ mAdvance.PushBack( floor( glyphPositions[i].x_advance * FROM_266 ) );
+ mCharacterMap.PushBack( glyphInfo[i].cluster );
+ mOffset.PushBack( floor( glyphPositions[i].x_offset * FROM_266 ) );
+ mOffset.PushBack( floor( glyphPositions[i].y_offset * FROM_266 ) );
+
+ DALI_LOG_RELEASE_INFO( "glyphIndex: %u, glyph.advance: %f, glyph.xBearing: %f\n", glyphInfo[i].codepoint, floor( glyphPositions[i].x_advance * FROM_266 ), floor( glyphPositions[i].x_offset * FROM_266 ) );
+
+ ++i;
+ }
+ }
+
+ /* Cleanup */
+ hb_buffer_destroy( harfBuzzBuffer );
+ hb_font_destroy( harfBuzzFont );
+ FT_Done_Face( face );
+
+ return mIndices.Count();
+ }
+
+ void GetGlyphs( GlyphInfo* glyphInfo,
+ CharacterIndex* glyphToCharacterMap )
+ {
+ Vector<CharacterIndex>::ConstIterator indicesIt = mIndices.Begin();
+ Vector<float>::ConstIterator advanceIt = mAdvance.Begin();
+ Vector<float>::ConstIterator offsetIt = mOffset.Begin();
+ Vector<CharacterIndex>::ConstIterator characterMapIt = mCharacterMap.Begin();
+
+ for( GlyphIndex index = 0u, size = mIndices.Count(); index < size; ++index )
+ {
+ GlyphInfo& glyph = *( glyphInfo + index );
+ CharacterIndex& glyphToCharacter = *( glyphToCharacterMap + index );
+
+ glyph.fontId = mFontId;
+ glyph.index = *( indicesIt + index );
+ glyph.advance = *( advanceIt + index );
+
+ const GlyphIndex offsetIndex = 2u * index;
+ glyph.xBearing = *( offsetIt + offsetIndex );
+ glyph.yBearing = *( offsetIt + offsetIndex + 1u );
+
+ glyphToCharacter = *( characterMapIt + index );
+ }
+ }
+
+ FT_Library mFreeTypeLibrary;
+
+ Vector<CharacterIndex> mIndices;
+ Vector<float> mAdvance;
+ Vector<float> mOffset;
+ Vector<CharacterIndex> mCharacterMap;
+ FontId mFontId;
+};
+
Shaping::Shaping()
: mPlugin( NULL )
{
-
}
Shaping::~Shaping()
{
-
+ delete mPlugin;
}
TextAbstraction::Shaping Shaping::Get()
FontId fontId,
Script script )
{
- return 0u;
+ CreatePlugin();
+
+ return mPlugin->Shape( text,
+ numberOfCharacters,
+ fontId,
+ script );
}
void Shaping::GetGlyphs( GlyphInfo* glyphInfo,
CharacterIndex* glyphToCharacterMap )
{
+ CreatePlugin();
+
+ mPlugin->GetGlyphs( glyphInfo,
+ glyphToCharacterMap );
+}
+
+void Shaping::CreatePlugin()
+{
+ if( !mPlugin )
+ {
+ mPlugin = new Plugin();
+ mPlugin->Initialize();
+ }
}
} // namespace Internal
projects / platform / core / uifw / dali-adaptor.git / blobdiff