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Glyphs and their bounding boxes are held in vectors instead of deque. 

Moved scaling of font glyphs to the moment when they are created (eliminated a few multiplications unnecessary variables).
Changed some magic numbers into constants.
This commit is contained in:
Maciej Suminski 2013-12-05 16:29:54 +01:00
parent ca11855f12
commit 6be27ae2ea
2 changed files with 158 additions and 110 deletions
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207
common/gal/stroke_font.cpp
View File

@ -30,9 +30,9 @@
using namespace KIGFX;
const double STROKE_FONT::LINE_HEIGHT_RATIO = 1.6;
const double STROKE_FONT::OVERBAR_HEIGHT = 0.45;
const double STROKE_FONT::BOLD_FACTOR = 1.3;
const double STROKE_FONT::HERSHEY_SCALE = 1.0 / 21.0;
STROKE_FONT::STROKE_FONT( GAL* aGal ) :
m_gal( aGal ),
@ -41,7 +41,6 @@ STROKE_FONT::STROKE_FONT( GAL* aGal ) :
m_mirrored( false )
{
// Default values
m_scaleFactor = 1.0 / 21.0;
m_glyphSize = VECTOR2D( 10.0, 10.0 );
m_verticalJustify = GR_TEXT_VJUSTIFY_BOTTOM;
m_horizontalJustify = GR_TEXT_HJUSTIFY_LEFT;
@ -57,6 +56,8 @@ bool STROKE_FONT::LoadNewStrokeFont( const char* const aNewStrokeFont[], int aNe
{
m_glyphs.clear();
m_glyphBoundingBoxes.clear();
m_glyphs.resize( aNewStrokeFontSize );
m_glyphBoundingBoxes.resize( aNewStrokeFontSize );
for( int j = 0; j < aNewStrokeFontSize; j++ )
{
@ -82,8 +83,8 @@ bool STROKE_FONT::LoadNewStrokeFont( const char* const aNewStrokeFont[], int aNe
if( i < 2 )
{
// The first two values contain the width of the char
glyphStartX = coordinate[0] - 'R';
glyphEndX = coordinate[1] - 'R';
glyphStartX = ( coordinate[0] - 'R' ) * HERSHEY_SCALE;
glyphEndX = ( coordinate[1] - 'R' ) * HERSHEY_SCALE;
glyphBoundingX = VECTOR2D( 0, glyphEndX - glyphStartX );
}
else if( ( coordinate[0] == ' ' ) && ( coordinate[1] == 'R' ) )
@ -98,8 +99,8 @@ bool STROKE_FONT::LoadNewStrokeFont( const char* const aNewStrokeFont[], int aNe
{
// Every coordinate description of the Hershey format has an offset,
// it has to be subtracted
point.x = (double) ( coordinate[0] - 'R' ) - glyphStartX;
point.y = (double) ( coordinate[1] - 'R' ) - 11.0;
point.x = (double) ( coordinate[0] - 'R' ) * HERSHEY_SCALE - glyphStartX;
point.y = (double) ( coordinate[1] - 'R' ) * HERSHEY_SCALE;
pointList.push_back( point );
}
@ -109,16 +110,22 @@ bool STROKE_FONT::LoadNewStrokeFont( const char* const aNewStrokeFont[], int aNe
if( pointList.size() > 0 )
glyph.push_back( pointList );
m_glyphs.push_back( glyph );
m_glyphs[j] = glyph;
// Compute the bounding box of the glyph
m_glyphBoundingBoxes.push_back( computeBoundingBox( glyph, glyphBoundingX ) );
m_glyphBoundingBoxes[j] = computeBoundingBox( glyph, glyphBoundingX );
}
return true;
}
int STROKE_FONT::getInterline() const
{
return ( m_glyphSize.y * 14 ) / 10 + m_gal->GetLineWidth();
}
BOX2D STROKE_FONT::computeBoundingBox( const GLYPH& aGLYPH, const VECTOR2D& aGLYPHBoundingX ) const
{
BOX2D boundingBox;
@ -145,115 +152,134 @@ BOX2D STROKE_FONT::computeBoundingBox( const GLYPH& aGLYPH, const VECTOR2D& aGLY
void STROKE_FONT::Draw( wxString aText, const VECTOR2D& aPosition, double aRotationAngle )
{
// By default overbar is turned off
m_overbar = false;
// Context needs to be saved before any transformations
m_gal->Save();
m_gal->Translate( aPosition );
m_gal->Rotate( -aRotationAngle );
// Split multiline strings into separate ones and draw them line by line
int newlinePos = aText.Find( '\n' );
// Single line height
int lineHeight = getInterline();
if( newlinePos != wxNOT_FOUND )
{
VECTOR2D nextlinePosition = VECTOR2D( 0.0, m_glyphSize.y * LINE_HEIGHT_RATIO );
Draw( aText.Mid( newlinePos + 1 ), nextlinePosition, 0.0 );
aText = aText.Mid( 0, newlinePos );
}
// Compute the text size
VECTOR2D textsize = computeTextSize( aText );
// Adjust the text position to the given alignment
switch( m_horizontalJustify )
{
case GR_TEXT_HJUSTIFY_CENTER:
m_gal->Translate( VECTOR2D( -textsize.x / 2.0, 0 ) );
break;
case GR_TEXT_HJUSTIFY_RIGHT:
if( !m_mirrored )
m_gal->Translate( VECTOR2D( -textsize.x, 0 ) );
break;
case GR_TEXT_HJUSTIFY_LEFT:
if( m_mirrored )
m_gal->Translate( VECTOR2D( -textsize.x, 0 ) );
break;
default:
break;
}
// The overall height of all lines of text
double textBlockHeight = lineHeight * ( linesCount( aText ) - 1 );
switch( m_verticalJustify )
{
case GR_TEXT_VJUSTIFY_CENTER:
m_gal->Translate( VECTOR2D( 0, textsize.y / 2.0 ) );
break;
case GR_TEXT_VJUSTIFY_TOP:
m_gal->Translate( VECTOR2D( 0, textsize.y ) );
m_gal->Translate( VECTOR2D( 0, -textBlockHeight / 2.0 ) );
break;
case GR_TEXT_VJUSTIFY_BOTTOM:
m_gal->Translate( VECTOR2D( 0, -textBlockHeight ) );
break;
case GR_TEXT_VJUSTIFY_TOP:
break;
default:
break;
}
double xOffset, glyphSizeX;
if( m_mirrored )
{
// In case of mirrored text invert the X scale of points and their X direction
// (m_glyphSize.x) and start drawing from the position where text normally should end
// (textsize.x)
xOffset = textsize.x;
glyphSizeX = -m_glyphSize.x;
}
else
{
xOffset = 0.0;
glyphSizeX = m_glyphSize.x;
}
double scaleY = m_scaleFactor * m_glyphSize.y;
double scaleX = m_scaleFactor * glyphSizeX;
m_gal->Rotate( -aRotationAngle );
m_gal->SetIsStroke( true );
m_gal->SetIsFill( false );
if( m_bold )
m_gal->SetLineWidth( m_gal->GetLineWidth() * BOLD_FACTOR );
// Split multiline strings into separate ones and draw them line by line
int begin = 0;
int newlinePos = aText.find( '\n' );
while( newlinePos != wxNOT_FOUND )
{
m_gal->SetLineWidth( m_gal->GetLineWidth() * 1.3 );
size_t length = newlinePos - begin;
drawSingleLineText( aText.Mid( begin, length ) );
m_gal->Translate( VECTOR2D( 0.0, lineHeight ) );
begin = newlinePos + 1;
newlinePos = aText.find( '\n', begin + 1 );
}
// Draw the last (or the only one) line
drawSingleLineText( aText.Mid( begin ) );
m_gal->Restore();
}
void STROKE_FONT::drawSingleLineText( const wxString& aText )
{
// By default the overbar is turned off
m_overbar = false;
double xOffset;
VECTOR2D glyphSize( m_glyphSize );
// Compute the text size
VECTOR2D textSize = computeTextSize( aText );
m_gal->Save();
// Adjust the text position to the given alignment
switch( m_horizontalJustify )
{
case GR_TEXT_HJUSTIFY_CENTER:
m_gal->Translate( VECTOR2D( -textSize.x / 2.0, 0 ) );
break;
case GR_TEXT_HJUSTIFY_RIGHT:
if( !m_mirrored )
m_gal->Translate( VECTOR2D( -textSize.x, 0 ) );
break;
case GR_TEXT_HJUSTIFY_LEFT:
if( m_mirrored )
m_gal->Translate( VECTOR2D( -textSize.x, 0 ) );
break;
default:
break;
}
if( m_mirrored )
{
// In case of mirrored text invert the X scale of points and their X direction
// (m_glyphSize.x) and start drawing from the position where text normally should end
// (textSize.x)
xOffset = textSize.x;
glyphSize.x = -m_glyphSize.x;
} else
{
xOffset = 0.0;
}
for( wxString::const_iterator chIt = aText.begin(); chIt != aText.end(); chIt++ )
{
// Toggle overbar
if( *chIt == '~' )
{
m_overbar = !m_overbar;
continue;
}
GLYPH_LIST::iterator glyphIt = m_glyphs.begin();
std::deque<BOX2D>::iterator bbIt = m_glyphBoundingBoxes.begin();
unsigned dd = *chIt - ' ';
if( dd >= m_glyphBoundingBoxes.size() )
if( dd >= m_glyphBoundingBoxes.size() || dd < 0 )
dd = '?' - ' ';
advance( glyphIt, dd );
advance( bbIt, dd );
GLYPH& glyph = m_glyphs[dd];
BOX2D& bbox = m_glyphBoundingBoxes[dd];
GLYPH glyph = *glyphIt;
if( m_overbar )
{
VECTOR2D startOverbar( xOffset, -getInterline() * OVERBAR_HEIGHT );
VECTOR2D endOverbar( xOffset + glyphSize.x * bbox.GetEnd().x,
-getInterline() * OVERBAR_HEIGHT );
m_gal->DrawLine( startOverbar, endOverbar );
}
for( GLYPH::iterator pointListIt = glyph.begin(); pointListIt != glyph.end();
pointListIt++ )
@ -263,7 +289,7 @@ void STROKE_FONT::Draw( wxString aText, const VECTOR2D& aPosition, double aRotat
for( std::deque<VECTOR2D>::iterator pointIt = pointListIt->begin();
pointIt != pointListIt->end(); pointIt++ )
{
VECTOR2D pointPos( pointIt->x * scaleX + xOffset, pointIt->y * scaleY );
VECTOR2D pointPos( pointIt->x * glyphSize.x + xOffset, pointIt->y * glyphSize.y );
if( m_italic )
{
@ -278,15 +304,7 @@ void STROKE_FONT::Draw( wxString aText, const VECTOR2D& aPosition, double aRotat
m_gal->DrawPolyline( pointListScaled );
}
if( m_overbar )
{
VECTOR2D startOverbar( xOffset, -textsize.y * 1.2 );
VECTOR2D endOverbar( xOffset + m_scaleFactor * glyphSizeX * bbIt->GetEnd().x,
-textsize.y * 1.2 );
m_gal->DrawLine( startOverbar, endOverbar );
}
xOffset += m_scaleFactor * glyphSizeX * bbIt->GetEnd().x;
xOffset += glyphSize.x * bbox.GetEnd().x;
}
m_gal->Restore();
@ -299,18 +317,19 @@ VECTOR2D STROKE_FONT::computeTextSize( const wxString& aText ) const
for( wxString::const_iterator chIt = aText.begin(); chIt != aText.end(); chIt++ )
{
wxASSERT_MSG( *chIt != '\n',
wxT( "This function is intended to work with single line strings" ) );
if( *chIt == '~' )
continue;
std::deque<BOX2D>::const_iterator bbIt = m_glyphBoundingBoxes.begin();
// Index in the bounding boxes table
unsigned dd = *chIt - ' ';
if( dd >= m_glyphBoundingBoxes.size() )
if( dd >= m_glyphBoundingBoxes.size() || dd < 0 )
dd = '?' - ' ';
advance( bbIt, dd );
result.x += m_scaleFactor * m_glyphSize.x * bbIt->GetEnd().x;
result.x += m_glyphSize.x * m_glyphBoundingBoxes[dd].GetEnd().x;
}
return result;

61
include/gal/stroke_font.h
View File

@ -39,7 +39,7 @@ namespace KIGFX
class GAL;
typedef std::deque< std::deque<VECTOR2D> > GLYPH;
typedef std::deque<GLYPH> GLYPH_LIST;
typedef std::vector<GLYPH> GLYPH_LIST;
/**
* @brief Class STROKE_FONT implements stroke font drawing.
@ -55,8 +55,6 @@ public:
/// Destructor
~STROKE_FONT();
// TODO Load font from a text file
/**
* @brief Load the new stroke font.
*
@ -75,16 +73,6 @@ public:
*/
void Draw( wxString aText, const VECTOR2D& aPosition, double aRotationAngle );
/**
* @brief Set the scale factor of the font for the glyph size.
*
* @param aScaleFactor is the scale factor of the font.
*/
inline void SetScaleFactor( const double aScaleFactor )
{
m_scaleFactor = aScaleFactor;
}
/**
* @brief Set the glyph size.
*
@ -158,13 +146,19 @@ public:
private:
GAL* m_gal; ///< Pointer to the GAL
GLYPH_LIST m_glyphs; ///< Glyph list
std::deque<BOX2D> m_glyphBoundingBoxes; ///< Bounding boxes of the glyphs
double m_scaleFactor; ///< Scale factor for the glyph
std::vector<BOX2D> m_glyphBoundingBoxes; ///< Bounding boxes of the glyphs
VECTOR2D m_glyphSize; ///< Size of the glyphs
EDA_TEXT_HJUSTIFY_T m_horizontalJustify; ///< Horizontal justification
EDA_TEXT_VJUSTIFY_T m_verticalJustify; ///< Vertical justification
bool m_bold, m_italic, m_mirrored, m_overbar; ///< Properties of text
/**
* @brief Returns a single line height using current settings.
*
* @return The line height.
*/
int getInterline() const;
/**
* @brief Compute the bounding box of a given glyph.
*
@ -174,6 +168,14 @@ private:
*/
BOX2D computeBoundingBox( const GLYPH& aGlyph, const VECTOR2D& aGlyphBoundingX ) const;
/**
* @brief Draws a single line of text. Multiline texts should be split before using the
* function.
*
* @param aText is the text to be drawn.
*/
void drawSingleLineText( const wxString& aText );
/**
* @brief Compute the size of a given text.
*
@ -182,7 +184,34 @@ private:
*/
VECTOR2D computeTextSize( const wxString& aText ) const;
static const double LINE_HEIGHT_RATIO;
/**
* @brief Returns number of lines for a given text.
*
* @param aText is the text to be checked.
* @return Number of lines of aText.
*/
unsigned int linesCount( const wxString& aText ) const
{
wxString::const_iterator it, itEnd;
unsigned int lines = 1;
for( it = aText.begin(), itEnd = aText.end(); it != itEnd; ++it )
{
if( *it == '\n' )
++lines;
}
return lines;
}
///> Factor that determines relative height of overbar.
static const double OVERBAR_HEIGHT;
///> Factor that determines relative line width for bold text.
static const double BOLD_FACTOR;
///> Scale factor for the glyph
static const double HERSHEY_SCALE;
};
} // namespace KIGFX