public smallGlyphMetrics GetSmallMetrics(Table_EBLC.indexSubTable cIndexSubTable, uint nGlyphIndex, uint nStartGlyphIndex)
{
smallGlyphMetrics sgm = null;
int nIndexFormat = cIndexSubTable.header.indexFormat;
int nImageFormat = cIndexSubTable.header.imageFormat;
Debug.Assert(nImageFormat == 1 || nImageFormat == 2 || nImageFormat == 8);
// These images all have the same metrics as described in the indexSubTable so should have the proper image format
// Debug.Assert( nIndexFormat != 2 && nIndexFormat != 5 );
// commented out the above assert because batang.ttc violates this too much
if (nImageFormat == 1 || nImageFormat == 2 || nImageFormat == 8)
{
if (nGlyphIndex >= nStartGlyphIndex)
{
//EBDT table starts off with a version data so it would never be possible for this to be set to 0
uint nImageFormatOffset = getImageFormatOffset(cIndexSubTable, nGlyphIndex, nStartGlyphIndex);
if (nImageFormatOffset != 0)
{
// All of the supported image formats start with this data first
sgm = new smallGlyphMetrics();
sgm.height = m_bufTable.GetByte(nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.height);
sgm.width = m_bufTable.GetByte(nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.width);
sgm.BearingX = m_bufTable.GetSbyte(nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.BearingX);
sgm.BearingY = m_bufTable.GetSbyte(nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.BearingY);
sgm.Advance = m_bufTable.GetByte(nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.Advance);
}
}
}
return(sgm);
}
public bool Validate_Format2(Validator v, string sIdentity, Table_EBLC.indexSubTable ist)
{
bool bOk = true;
Table_EBLC.indexSubTableArray ista = ist.GetIndexSubTableArray();
for (ushort idGlyph = ista.firstGlyphIndex; idGlyph <= ista.lastGlyphIndex; idGlyph++)
{
// validate small metrics
smallGlyphMetrics sgm = null;
try {
sgm = GetSmallMetrics(ist, idGlyph, ista.firstGlyphIndex);
}
catch (Exception e)
{
v.ApplicationError(T.EBDT_GlyphImageData, E._Table_E_Exception, m_tag, "EBDT.Format2: " + e.Message);
bOk = false;
return(bOk);
}
if (sgm != null)
{
smallGlyphMetrics_val sgm_val = smallGlyphMetrics_val.CreateFromSmallGlyphMetrics(sgm);
if (!sgm_val.Validate(v, sIdentity + ", idGlyph=" + idGlyph, this))
{
bOk = false;
}
// validate image data
// - this is just bitmap data, any values should be valid
}
}
return(bOk);
}
public bool Validate_Format1(Validator v, string sIdentity, Table_EBLC.indexSubTable ist)
{
bool bOk = true;
Table_EBLC.indexSubTableArray ista = ist.GetIndexSubTableArray();
for (ushort idGlyph = ista.firstGlyphIndex; idGlyph <= ista.lastGlyphIndex; idGlyph++)
{
// validate small metrics
smallGlyphMetrics sgm = GetSmallMetrics(ist, idGlyph, ista.firstGlyphIndex);
if (sgm != null)
{
smallGlyphMetrics_val sgm_val = smallGlyphMetrics_val.CreateFromSmallGlyphMetrics(sgm);
if (!sgm_val.Validate(v, sIdentity + ", idGlyph=" + idGlyph, this))
{
bOk = false;
}
// validate image data
// - this is just bitmap data, any values should be valid
}
}
return(bOk);
}
public static smallGlyphMetrics_val CreateFromSmallGlyphMetrics(smallGlyphMetrics sgm)
{
smallGlyphMetrics_val sgm_val = new smallGlyphMetrics_val();
sgm_val.height = sgm.height;
sgm_val.width = sgm.width;
sgm_val.BearingX = sgm.BearingX;
sgm_val.BearingY = sgm.BearingY;
sgm_val.Advance = sgm.Advance;
return sgm_val;
}
public static smallGlyphMetrics_val CreateFromSmallGlyphMetrics(smallGlyphMetrics sgm)
{
smallGlyphMetrics_val sgm_val = new smallGlyphMetrics_val();
sgm_val.height = sgm.height;
sgm_val.width = sgm.width;
sgm_val.BearingX = sgm.BearingX;
sgm_val.BearingY = sgm.BearingY;
sgm_val.Advance = sgm.Advance;
return(sgm_val);
}
public object Clone()
{
smallGlyphMetrics sgm = new smallGlyphMetrics();
sgm.height = height;
sgm.width = width;
sgm.BearingX = BearingX;
sgm.BearingY = BearingY;
sgm.Advance = Advance;
return(sgm);
}
public object Clone()
{
smallGlyphMetrics sgm = new smallGlyphMetrics();
sgm.height = height;
sgm.width = width;
sgm.BearingX = BearingX;
sgm.BearingY = BearingY;
sgm.Advance = Advance;
return sgm;
}
public smallGlyphMetrics GetSmallMetrics( Table_EBLC.indexSubTable cIndexSubTable, uint nGlyphIndex, uint nStartGlyphIndex )
{
smallGlyphMetrics sgm = null;
int nIndexFormat = cIndexSubTable.header.indexFormat;
int nImageFormat = cIndexSubTable.header.imageFormat;
Debug.Assert( nImageFormat == 1 || nImageFormat == 2 || nImageFormat == 8);
// These images all have the same metrics as described in the indexSubTable so should have the proper image format
// Debug.Assert( nIndexFormat != 2 && nIndexFormat != 5 );
// commented out the above assert because batang.ttc violates this too much
if (nImageFormat == 1 || nImageFormat == 2 || nImageFormat == 8)
{
if( nGlyphIndex >= nStartGlyphIndex )
{
//EBDT table starts off with a version data so it would never be possible for this to be set to 0
uint nImageFormatOffset = getImageFormatOffset( cIndexSubTable, nGlyphIndex, nStartGlyphIndex );
if( nImageFormatOffset != 0 )
{
// All of the supported image formats start with this data first
sgm = new smallGlyphMetrics();
sgm.height = m_bufTable.GetByte( nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.height );
sgm.width = m_bufTable.GetByte( nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.width );
sgm.BearingX = m_bufTable.GetSbyte( nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.BearingX );
sgm.BearingY = m_bufTable.GetSbyte( nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.BearingY );
sgm.Advance = m_bufTable.GetByte( nImageFormatOffset + (uint)smallGlyphMetrics.FieldOffsets.Advance );
}
}
}
return sgm;
}
public byte [,] GetBitmapImage(Table_EBLC.bitmapSizeTable bst, ushort glyphID)
{
byte [,] bits = null;
Table_EBLC.indexSubTableArray ista = bst.FindIndexSubTableArray(glyphID);
if (ista != null)
{
Table_EBLC.indexSubTable ist = bst.GetIndexSubTable(ista);
if (ist.header.imageFormat < 8)
{
// simple bitmap
byte [] encodedDataBuf = GetImageData(ist, glyphID, ista.firstGlyphIndex);
byte width = 0, height = 0;
switch (ist.header.imageFormat)
{
case 0:
throw new ApplicationException("illegal image format: 0");
//break;
case 1:
case 2:
smallGlyphMetrics sgm = this.GetSmallMetrics(ist, glyphID, ista.firstGlyphIndex);
width = sgm.width;
height = sgm.height;
break;
case 3:
case 4:
throw new ApplicationException("illegal image format: " + ist.header.imageFormat);
//break;
case 5:
switch (ist.header.indexFormat)
{
case 2:
Table_EBLC.indexSubTable2 ist2 = (Table_EBLC.indexSubTable2)ist;
width = ist2.bigMetrics.width;
height = ist2.bigMetrics.height;
break;
case 5:
Table_EBLC.indexSubTable5 ist5 = (Table_EBLC.indexSubTable5)ist;
width = ist5.bigMetrics.width;
height = ist5.bigMetrics.height;
break;
}
break;
case 6:
case 7:
bigGlyphMetrics bgm = this.GetBigMetrics(ist, glyphID, ista.firstGlyphIndex);
width = bgm.width;
height = bgm.height;
break;
}
if (encodedDataBuf != null)
{
bits = DecodeImageData(ist, width, height, bst.bitDepth, encodedDataBuf);
}
else
{
//Debug.Assert(false);
}
}
else if (ist.header.imageFormat < 10)
{
// composite bitmap
throw new ApplicationException("TODO: impelement bitmap composites");
}
else
{
Debug.Assert(false, "illegal image format");
}
}
return(bits);
}
public bool Validate_Format8(Validator v, string sIdentity, Table_EBLC.indexSubTable ist)
{
bool bOk = true;
Table_EBLC.indexSubTableArray ista = ist.GetIndexSubTableArray();
for (ushort idGlyph = ista.firstGlyphIndex; idGlyph <= ista.lastGlyphIndex; idGlyph++)
{
// validate small metrics
smallGlyphMetrics sgm = GetSmallMetrics(ist, idGlyph, ista.firstGlyphIndex);
if (sgm != null)
{
smallGlyphMetrics_val sgm_val = smallGlyphMetrics_val.CreateFromSmallGlyphMetrics(sgm);
if (!sgm_val.Validate(v, sIdentity + ", idGlyph=" + idGlyph, this))
{
bOk = false;
}
ushort numComponents = this.GetNumComponents(ist, idGlyph, ista.firstGlyphIndex);
// validate component array
for (uint i = 0; i < numComponents; i++)
{
ebdtComponent component = GetComponent(ist, idGlyph, ista.firstGlyphIndex, i);
Debug.Assert(component != null);
// validate the ebdtComponent
// verify that the component's glyph code is less than maxp numGlyphs
if (component.glyphCode >= m_nCachedMaxpNumGlyphs)
{
string sDetails = sIdentity + ", idGlyph=" + idGlyph +
", component[" + i + "].glyphCode=" + component.glyphCode +
", maxp.numGlyphs = " + m_nCachedMaxpNumGlyphs;
v.Error(T.EBDT_GlyphImageData, E.EBDT_E_GlyphImageData, m_tag, sDetails);
bOk = false;
}
// verify that the component's glyph code isn't 0, which should be reserved as the empty glyph
// (technically, someone could use the empty glyph as a component, but it's more likely to be an error)
if (component.glyphCode == 0)
{
string sDetails = sIdentity + ", idGlyph=" + idGlyph +
", component[" + i + "].glyphCode=" + component.glyphCode;
v.Error(T.EBDT_GlyphImageData, E.EBDT_E_GlyphImageData, m_tag, sDetails);
bOk = false;
}
// verify that the component's glyph code isn't the glyph code of its parent
if (component.glyphCode == idGlyph)
{
string sDetails = sIdentity + ", idGlyph=" + idGlyph +
", component[" + i + "].glyphCode=" + component.glyphCode + " (glyph can't use itself as a component)";
v.Error(T.EBDT_GlyphImageData, E.EBDT_E_GlyphImageData, m_tag, sDetails);
bOk = false;
}
}
}
}
return(bOk);
}
