void DoWork()
{
ANT_Library library;
ANT_Face face;
ANT_GlyphSlot slot;
ANT_Error error;
string filename;
string text;
int num_chars;
bool use_kerning;
int previous;
int pen_x, pen_y, n;
filename = Common.Example_AltNETType_FontFileName;
text = "AltNETType (transformation + centering + kerning)";// Common.Pangram;
num_chars = text.Length;
// ... initialize library ...
// ... create face object ...
// ... set character size ...
{
// initialize library
error = ANT.ANT_Init_AltNETType(out library);
// error handling omitted
// create face object
error = ANT.ANT_New_Face(library, filename, 0, out face);
// error handling omitted
if (error != ANT_Error.ANT_Err_Ok)
{
return;
}
// use 50pt at 100dpi
// set character size
error = ANT.ANT_Set_Char_Size(face, 28 * 64, 0, 96, 0);
// error handling omitted
}
// a small shortcut
slot = face.glyph;
// start at (0,0)
pen_x = 0;
pen_y = 0;
num_glyphs = 0;
use_kerning = ANT.ANT_HAS_KERNING(face);
previous = 0;
ANT_Vector delta = new ANT_Vector();
for (n = 0; n < num_chars; n++)
{
glyph = glyphs[n];
if (glyph == null)
{
glyphs[n] = glyph = new TGlyph();
}
// convert character code to glyph index
glyph.index = ANT.ANT_Get_Char_Index(face, text[n]);
// retrieve kerning distance and move pen position
if (use_kerning &&
previous != 0 &&
glyph.index != 0)
{
ANT.ANT_Get_Kerning(face, previous, glyph.index, ANT_Kerning_Mode.ANT_KERNING_DEFAULT, delta);
pen_x += delta.x >> 6;
}
// store current pen position
if (glyph.pos == null)
{
glyph.pos = new ANT_Vector();
}
glyph.pos.x = pen_x;
glyph.pos.y = pen_y;
// load glyph image into the slot without rendering
error = ANT.ANT_Load_Glyph(face, glyph.index, ANT_LOAD.ANT_LOAD_DEFAULT);
if (error != ANT_Error.ANT_Err_Ok)
{
// ignore errors, jump to next glyph
continue;
}
// extract glyph image and store it in our table
error = ANT.ANT_Get_Glyph(face.glyph, out glyph.image);
if (error != ANT_Error.ANT_Err_Ok)
{
// ignore errors, jump to next glyph
continue;
}
// translate the glyph image now
ANT.ANT_Glyph_Transform(glyph.image, null, glyph.pos);
// increment pen position
pen_x += slot.advance.x >> 6;
// record current glyph index
previous = glyph.index;
// increment number of glyphs
num_glyphs++;
}
ANT_Vector start = new ANT_Vector();
// transformation matrix
ANT_Matrix matrix = new ANT_Matrix();
ANT_Glyph image;
ANT_Vector pen = new ANT_Vector();
ANT_BBox bbox = new ANT_BBox();
double angle;
ANT_BBox string_bbox;
compute_string_bbox(out string_bbox);
int my_target_width = WIDTH;
int my_target_height = HEIGHT;
// compute string dimensions in integer pixels
int string_width = string_bbox.xMax - string_bbox.xMin;
int string_height = string_bbox.yMax - string_bbox.yMin;
// use -30 degrees
angle = (330.0 / 360) * 3.14159 * 2;
// compute start pen position in 26.6 cartesian pixels
start.x = (int)(((my_target_width - string_width * Math.Cos(angle) - string_height * Math.Sin(angle)) / 2 + string_bbox.yMax * Math.Sin(angle)) * 64);
// start.y = ((my_target_height - string_height) / 2) * 64;
// need to center bitmaps (not base line)
start.y = (int)(((my_target_height - string_height * Math.Cos(angle) - string_width * Math.Sin(angle)) / 2 - string_bbox.yMin * Math.Cos(angle)) * 64);
// set up transform (a rotation here)
matrix.xx = (int)(Math.Cos(angle) * 0x10000L);
matrix.xy = (int)(-Math.Sin(angle) * 0x10000L);
matrix.yx = (int)(Math.Sin(angle) * 0x10000L);
matrix.yy = (int)(Math.Cos(angle) * 0x10000L);
pen.CopyFrom(start);
for (n = 0; n < num_glyphs; n++)
{
// create a copy of the original glyph
error = ANT.ANT_Glyph_Copy(glyphs[n].image, out image);
if (error != ANT_Error.ANT_Err_Ok)
{
continue;
}
// transform copy (this will also translate it to the
// correct position
ANT.ANT_Glyph_Transform(image, matrix, pen);
// check bounding box; if the transformed glyph image
// is not in our target surface, we can avoid rendering it
ANT.ANT_Glyph_Get_CBox(image, ANT_Glyph_BBox_Mode.ANT_GLYPH_BBOX_PIXELS, bbox);
if (bbox.xMax <= 0 ||
bbox.xMin >= my_target_width ||
bbox.yMax <= 0 ||
bbox.yMin >= my_target_height)
{
//continue;
}
else
{
// convert glyph image to bitmap (destroy the glyph copy!)
error = ANT.ANT_Glyph_To_Bitmap(ref image, ANT_Render_Mode.ANT_RENDER_MODE_NORMAL,
null, // no additional translation
true); // destroy copy in "image"
if (error == ANT_Error.ANT_Err_Ok)
{
ANT_BitmapGlyph bit = (ANT_BitmapGlyph)image;
draw_bitmap(bit.bitmap, bit.left, my_target_height - bit.top);
}
}
// increment pen position --
// we don't have access to a slot structure,
// so we have to use advances from glyph structure
// (which are in 16.16 fixed float format)
pen.x += image.advance.x >> 10;
pen.y += image.advance.y >> 10;
ANT.ANT_Done_Glyph(ref image);
}
//
show_image();
ANT.ANT_Done_Face(ref face);
ANT.ANT_Done_AltNETType(ref library);
}
public void AddFont(string strFileName, int size, string szLetters)
{
if (string.IsNullOrEmpty(strFileName) ||
!Alt.IO.VirtualFile.Exists(strFileName))
{
return;
}
if (m_Library == null)
{
if (ANT.ANT_Init_AltNETType(out m_Library) != ANT_Error.ANT_Err_Ok)
{
throw new Exception("ANT_Init_FreeType failed");
}
}
// The Object In Which FreeType Holds Information On A Given
// Font Is Called A "face".
ANT_Face face;
string file = strFileName;
// This Is Where We Load In The Font Information From The File.
if (ANT.ANT_New_Face(m_Library, file, 0, out face) != ANT_Error.ANT_Err_Ok)
{
throw new Exception("no font: " + file);
}
// FreeType Measures Font Size In Terms Of 1/64ths Of Pixels.
ANT.ANT_Set_Char_Size(face, size * 64, size * 64, 72, 72);
int len = szLetters.Length;
int n;
ANTBitmapChar pFTBitmapChar;
ANT_Glyph pGlyph;
ANTBitmapFont pANTBitmapFont = new ANTBitmapFont(this);
pANTBitmapFont.LineHeight = face.size.metrics.height >> 6;
pANTBitmapFont.SetFTFace(face);
m_BitmapFonts.Add(pANTBitmapFont);
char c;
int height;
int yOffset;
int ixGlyph;
for (n = 0; n < len; n++)
{
c = szLetters[n];
// check that the character hasn't already been processed
if (pANTBitmapFont.GetChar(c) == null)
{
// Load The Glyph For Our Character.
ixGlyph = ANT.ANT_Get_Char_Index(face, c);
if (ixGlyph == 0)
{
Console.WriteLine("character doesn't exist in font: '" + c + "'");
}
else
{
if (ANT.ANT_Load_Glyph(face, ixGlyph, ANT_LOAD.ANT_LOAD_DEFAULT) != ANT_Error.ANT_Err_Ok)
{
throw new Exception("ANT_Load_Glyph failed");
}
// Move The Face's Glyph Into A Glyph Object.
if (ANT.ANT_Get_Glyph(face.glyph, out pGlyph) != ANT_Error.ANT_Err_Ok)
{
throw new Exception("ANT_Get_Glyph failed");
}
pFTBitmapChar = new ANTBitmapChar(c);
// all metrics dimensions are multiplied by 64, so we have to divide by 64
height = face.glyph.metrics.height >> 6;
yOffset = pANTBitmapFont.LineHeight - (face.glyph.metrics.horiBearingY >> 6);
pFTBitmapChar.SetOffsets(face.glyph.metrics.horiBearingX >> 6, yOffset);
pFTBitmapChar.SetSize(face.glyph.metrics.width >> 6, height);
pFTBitmapChar.SetXAdvance(face.glyph.metrics.horiAdvance >> 6);
pFTBitmapChar.SetGlyph(pGlyph);
m_BitmapChars.Add(pFTBitmapChar);
pANTBitmapFont.AddChar(c, pFTBitmapChar);
}
}
}
}
void DoWork()
{
ANT_Library library;
ANT_Face face;
ANT_GlyphSlot slot;
ANT_Error error;
string filename;
string text;
int num_chars;
int glyph_index;
bool use_kerning;
int previous;
int pen_x, pen_y, n;
filename = Common.Example_AltNETType_FontFileName;
text = "AltNETType (kerning + centering)";// Common.Pangram;
num_chars = text.Length;
// ... initialize library ...
// ... create face object ...
// ... set character size ...
{
// initialize library
error = ANT.ANT_Init_AltNETType(out library);
// error handling omitted
// create face object
error = ANT.ANT_New_Face(library, filename, 0, out face);
// error handling omitted
if (error != ANT_Error.ANT_Err_Ok)
{
return;
}
// use 36pt at 100dpi
// set character size
error = ANT.ANT_Set_Char_Size(face, 36 * 64, 0, 96, 0);
// error handling omitted
}
// a small shortcut
slot = face.glyph;
// start at (0,0)
pen_x = 0;
pen_y = 0;
num_glyphs = 0;
use_kerning = ANT.ANT_HAS_KERNING(face);
previous = 0;
ANT_Vector delta = new ANT_Vector();
for (n = 0; n < num_chars; n++)
{
// convert character code to glyph index
glyph_index = ANT.ANT_Get_Char_Index(face, text[n]);
// retrieve kerning distance and move pen position
if (use_kerning &&
previous != 0 &&
glyph_index != 0)
{
ANT.ANT_Get_Kerning(face, previous, glyph_index, ANT_Kerning_Mode.ANT_KERNING_DEFAULT, delta);
pen_x += delta.x >> 6;
}
// store current pen position
if (pos[num_glyphs] == null)
{
pos[num_glyphs] = new ANT_Vector();
}
pos[num_glyphs].x = pen_x;
pos[num_glyphs].y = pen_y;
// load glyph image into the slot without rendering
error = ANT.ANT_Load_Glyph(face, glyph_index, ANT_LOAD.ANT_LOAD_DEFAULT);
if (error != ANT_Error.ANT_Err_Ok)
{
// ignore errors, jump to next glyph
continue;
}
// extract glyph image and store it in our table
error = ANT.ANT_Get_Glyph(face.glyph, out glyphs[num_glyphs]);
if (error != ANT_Error.ANT_Err_Ok)
{
// ignore errors, jump to next glyph
continue;
}
// increment pen position
pen_x += slot.advance.x >> 6;
// record current glyph index
previous = glyph_index;
// increment number of glyphs
num_glyphs++;
}
ANT_BBox string_bbox;
compute_string_bbox(out string_bbox);
int my_target_width = WIDTH;
int my_target_height = HEIGHT;
// compute string dimensions in integer pixels
int string_width = string_bbox.xMax - string_bbox.xMin;
int string_height = string_bbox.yMax - string_bbox.yMin;
// compute start pen position in 26.6 cartesian pixels
int start_x = ((my_target_width - string_width) / 2) * 64;
// int start_y = ((my_target_height - string_height) / 2) * 64;
// need to center bitmaps (not base line)
int start_y = ((my_target_height - string_height) / 2 - string_bbox.yMin) * 64;
ANT_Vector pen = new ANT_Vector();
for (n = 0; n < num_glyphs; n++)
{
ANT_Glyph image = glyphs[n];
pen.x = start_x + pos[n].x * 64;
pen.y = start_y + pos[n].y * 64;
error = ANT.ANT_Glyph_To_Bitmap(ref image, ANT_Render_Mode.ANT_RENDER_MODE_NORMAL, pen, false);
if (error == ANT_Error.ANT_Err_Ok)
{
ANT_BitmapGlyph bit = (ANT_BitmapGlyph)image;
draw_bitmap(bit.bitmap, bit.left, my_target_height - bit.top);
ANT.ANT_Done_Glyph(ref image);
}
}
//
show_image();
ANT.ANT_Done_Face(ref face);
ANT.ANT_Done_AltNETType(ref library);
}