Class TrueTypeScaler

public TrueTypeScaler(int unitsPerEm,
                      ByteBuffer hhea,
                      ByteBuffer htmx,
                      ByteBuffer vhea,
                      ByteBuffer vtmx,
                      ByteBuffer maxp,
                      ByteBuffer controlValueTable,
                      ByteBuffer fpgm,
                      int locaFormat,
                      ByteBuffer loca,
                      ByteBuffer glyf,
                      ByteBuffer preProgram)
            throws FontFormatException

Constructs a new TrueTypeScaler.

Parameters:

unitsPerEm - the number of font units per em. This value can be retrieved from the font’s head table.

maxp - the maxp table of the font, which contains various constants needed for setting up the virtual machine that interprets TrueType bytecodes.

controlValueTable - the cvt table of the font, which contains the initial values of the control value table.

fpgm - the fpgm table of the font, which contains a font program that is executed exactly once. The purpose of the font program is to define functions and to patch the interpreter.

locaFormat - the format of the loca table. The value must be 0 for two-byte offsets, or 1 for four-byte offsets. TrueType and OpenType fonts indicate the format in the indexToLoc field of the font header.

loca - the loca table of the font, which contains for each glyph the offset of its outline data in glyf.

glyf - the glyf table of the font, which contains the outline data for all glyphs in the font.

preProgram - the prep table of the font, which contains a program that is executed whenever the point size or the device transform have changed. This program is called pre-program because it gets executed before the instructions of the individual glyphs. If the font does not contain a pre-program, pass null.

Throws:

FontFormatException - if format is neither 0 nor 1.

public void getAdvance(int glyphIndex,
                       float pointSize,
                       AffineTransform transform,
                       boolean antialias,
                       boolean fractionalMetrics,
                       boolean horizontal,
                       Point2D advance)

Determines the advance width and height for a glyph.

Overrides:

getAdvance in interface Scaler

Parameters:

glyphIndex - the glyph whose advance width and height is to be determined.

pointSize - the point size of the font.

transform - a transform that is applied in addition to scaling to the specified point size. This is often used for scaling according to the device resolution. Those who lack any aesthetic sense may also use the transform to slant or stretch glyphs.

antialias - true for anti-aliased rendering, false for normal rendering. For hinted fonts, this parameter may indeed affect the result.

fractionalMetrics - true for fractional metrics, false for rounding the result to a pixel boundary.

horizontal - true for horizontal line layout, false for vertical line layout.

advance - a point whose x and y fields will hold the advance in each direction. It is possible that both values are non-zero, for example if transform is a rotation, or in the case of Urdu fonts.

public float getAscent(float pointSize,
                       AffineTransform transform,
                       boolean antialias,
                       boolean fractionalMetrics,
                       boolean horizontal)

Determines the distance between the base line and the highest ascender.

Overrides:

getAscent in interface Scaler

Parameters:

pointSize - the point size of the font.

transform - a transform that is applied in addition to scaling to the specified point size. This is often used for scaling according to the device resolution. Those who lack any aesthetic sense may also use the transform to slant or stretch glyphs.

antialias - true for anti-aliased rendering, false for normal rendering. For hinted fonts, this parameter may indeed affect the result.

fractionalMetrics - true for fractional metrics, false for rounding the result to a pixel boundary.

horizontal - true for horizontal line layout, false for vertical line layout.

Returns:

the ascent, which usually is a positive number.

public float getDescent(float pointSize,
                        AffineTransform transform,
                        boolean antialiased,
                        boolean fractionalMetrics,
                        boolean horizontal)

Determines the distance between the base line and the lowest descender.

Overrides:

getDescent in interface Scaler

Parameters:

pointSize - the point size of the font.

transform - a transform that is applied in addition to scaling to the specified point size. This is often used for scaling according to the device resolution. Those who lack any aesthetic sense may also use the transform to slant or stretch glyphs.

antialiased - true for anti-aliased rendering, false for normal rendering. For hinted fonts, this parameter may indeed affect the result.

fractionalMetrics - true for fractional metrics, false for rounding the result to a pixel boundary.

horizontal - true for horizontal line layout, false for vertical line layout.

Returns:

the descent, which usually is a nagative number.

public GeneralPath getOutline(int glyphIndex,
                              float pointSize,
                              AffineTransform deviceTransform,
                              boolean antialias,
                              boolean fractionalMetrics,
                              Hinter hinter,
                              int type)

Retrieves the scaled outline of a glyph, adjusting control points to the raster grid if necessary.

Overrides:

getOutline in interface Scaler

Parameters:

glyphIndex - the glyph number whose outline is retrieved.

pointSize - the point size for the glyph.

deviceTransform - an affine transformation for the device.

antialias - whether or not the rasterizer will perform anti-aliasing on the returned path.

fractionalMetrics - false for adjusting glyph positions to the raster grid of device space.

public Zone getRawOutline(int glyphIndex,
                          AffineTransform transform)

Returns the raw outline data. This is used for the autofitter atm.

Overrides:

getRawOutline in interface Scaler

Parameters:

transform - the transform to apply

Returns:

the raw glyph outline