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 static Geometry ANT_Outline_ToGeometry(ANT_Outline outline, bool flipY, Matrix4 mtx)
{
if (outline == null)
{
return(null);
}
ANTOutlineGeometry path = new ANTOutlineGeometry();
double x1, y1, x2, y2, x3, y3;
int n; // index of contour in outline
int first; // index of first point in contour
int tag; // current point's state
first = 0;
ANT_Vector_Array points = outline.points;
for (n = 0; n < outline.n_contours; n++)
{
int last; // index of last point in contour
last = outline.contours[n];
int limit = last;
outline_v_start.CopyFrom(points[first]);
outline_v_last.CopyFrom(points[last]);
outline_v_control.CopyFrom(outline_v_start);
int point_index = first;
ANT_Byte_Array tags_buf = outline.tags;
int tags_index = first;
tag = ANT.ANT_CURVE_TAG(tags_buf[tags_index + 0]);
// A contour cannot start with a cubic control point!
if (tag == ANT_CURVE_Tag.ANT_CURVE_TAG_CUBIC)
{
return(null);
}
// check first point to determine origin
if (tag == ANT_CURVE_Tag.ANT_CURVE_TAG_CONIC)
{
// first point is conic control. Yes, this happens.
if (ANT.ANT_CURVE_TAG(tags_buf[last]) == ANT_CURVE_Tag.ANT_CURVE_TAG_ON)
{
// start at last point if it is on the curve
outline_v_start.CopyFrom(outline_v_last);
limit--;
}
else
{
// if both first and last points are conic,
// start at their middle and record its position
// for closure
outline_v_start.x = (outline_v_start.x + outline_v_last.x) / 2;
outline_v_start.y = (outline_v_start.y + outline_v_last.y) / 2;
outline_v_last.CopyFrom(outline_v_start);
}
point_index--;
tags_index--;
}
x1 = ANT.ANT_int26p6_to_double(outline_v_start.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_start.y);
if (flipY)
{
y1 = -y1;
}
mtx.Transform(ref x1, ref y1);
path.MoveTo(x1, y1);
while (point_index < limit)
{
point_index++;
ANT_Vector point = points[point_index];
tags_index++;
tag = ANT.ANT_CURVE_TAG(tags_buf[tags_index + 0]);
switch (tag)
{
case ANT_CURVE_Tag.ANT_CURVE_TAG_ON: // emit a single line_to
{
x1 = ANT.ANT_int26p6_to_double(point.x);
y1 = ANT.ANT_int26p6_to_double(point.y);
if (flipY)
{
y1 = -y1;
}
mtx.Transform(ref x1, ref y1);
path.LineTo(x1, y1);
continue;
}
case ANT_CURVE_Tag.ANT_CURVE_TAG_CONIC: // consume conic arcs
{
outline_v_control.x = point.x;
outline_v_control.y = point.y;
Do_Conic:
if (point_index < limit)
{
point_index++;
point = points[point_index];
tags_index++;
tag = ANT.ANT_CURVE_TAG(tags_buf[tags_index + 0]);
outline_vec.CopyFrom(point);
if (tag == ANT_CURVE_Tag.ANT_CURVE_TAG_ON)
{
x1 = ANT.ANT_int26p6_to_double(outline_v_control.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_control.y);
x2 = ANT.ANT_int26p6_to_double(outline_vec.x);
y2 = ANT.ANT_int26p6_to_double(outline_vec.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
path.Сurve3(x1,
y1,
x2,
y2);
continue;
}
if (tag != ANT_CURVE_Tag.ANT_CURVE_TAG_CONIC)
{
return(null);
}
outline_v_middle.x = (outline_v_control.x + outline_vec.x) / 2;
outline_v_middle.y = (outline_v_control.y + outline_vec.y) / 2;
x1 = ANT.ANT_int26p6_to_double(outline_v_control.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_control.y);
x2 = ANT.ANT_int26p6_to_double(outline_v_middle.x);
y2 = ANT.ANT_int26p6_to_double(outline_v_middle.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
path.Сurve3(x1,
y1,
x2,
y2);
outline_v_control.CopyFrom(outline_vec);
goto Do_Conic;
}
x1 = ANT.ANT_int26p6_to_double(outline_v_control.x);
y1 = ANT.ANT_int26p6_to_double(outline_v_control.y);
x2 = ANT.ANT_int26p6_to_double(outline_v_start.x);
y2 = ANT.ANT_int26p6_to_double(outline_v_start.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
path.Сurve3(x1,
y1,
x2,
y2);
goto Close;
}
default:
{
if (point_index + 1 > limit ||
ANT.ANT_CURVE_TAG(tags_buf[tags_index + 1]) != ANT_CURVE_Tag.ANT_CURVE_TAG_CUBIC)
{
return(null);
}
outline_vec1.x = points[point_index + 0].x;
outline_vec1.y = points[point_index + 0].y;
outline_vec2.x = points[point_index + 1].x;
outline_vec2.y = points[point_index + 1].y;
point_index += 2;
{
point = points[point_index];
}
tags_index += 2;
if (point_index <= limit)
{
outline_vec.CopyFrom(point);
x1 = ANT.ANT_int26p6_to_double(outline_vec1.x);
y1 = ANT.ANT_int26p6_to_double(outline_vec1.y);
x2 = ANT.ANT_int26p6_to_double(outline_vec2.x);
y2 = ANT.ANT_int26p6_to_double(outline_vec2.y);
x3 = ANT.ANT_int26p6_to_double(outline_vec.x);
y3 = ANT.ANT_int26p6_to_double(outline_vec.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
y3 = -y3;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
mtx.Transform(ref x3, ref y3);
path.Сurve4(x1,
y1,
x2,
y2,
x3,
y3);
continue;
}
x1 = ANT.ANT_int26p6_to_double(outline_vec1.x);
y1 = ANT.ANT_int26p6_to_double(outline_vec1.y);
x2 = ANT.ANT_int26p6_to_double(outline_vec2.x);
y2 = ANT.ANT_int26p6_to_double(outline_vec2.y);
x3 = ANT.ANT_int26p6_to_double(outline_v_start.x);
y3 = ANT.ANT_int26p6_to_double(outline_v_start.y);
if (flipY)
{
y1 = -y1;
y2 = -y2;
y3 = -y3;
}
mtx.Transform(ref x1, ref y1);
mtx.Transform(ref x2, ref y2);
mtx.Transform(ref x3, ref y3);
path.Сurve4(x1,
y1,
x2,
y2,
x3,
y3);
goto Close;
}
}
}
path.ClosePolygon();
Close:
first = last + 1;
}
return(path);
}