public static PhpArray imagettftext(Context ctx, PhpResource im, double size, double angle, int x, int y, long color, string font_file, string text)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(null);
}
if (string.IsNullOrEmpty(font_file))
{
PhpException.Throw(PhpError.Warning, Resources.filename_cannot_be_empty);
return(null);
}
var font_stream = PhpStream.Open(ctx, font_file, "rb");
if (font_stream == null)
{
PhpException.Throw(PhpError.Warning, Resources.invalid_font_filename, font_file);
return(null);
}
// Font preparation
FontFamily family;
try
{
family = new FontCollection().Install(font_stream.RawStream); // TODO: perf: global font collection cache
if (ReferenceEquals(family, null))
{
throw new InvalidOperationException();
}
}
catch
{
PhpException.Throw(PhpError.Warning, Resources.invalid_font_filename, font_file);
return(null);
}
finally
{
font_stream.Dispose();
}
FontStyle style;
if (family.IsStyleAvailible(FontStyle.Regular))
{
style = FontStyle.Regular;
}
else if (family.IsStyleAvailible(FontStyle.Bold))
{
style = FontStyle.Bold;
}
else if (family.IsStyleAvailible(FontStyle.Italic))
{
style = FontStyle.Italic;
}
else if (family.IsStyleAvailible(FontStyle.BoldItalic))
{
style = FontStyle.BoldItalic;
}
else
{
return(null);
}
var font = new Font(family, (float)size, style);
var textsize = TextMeasurer.Measure(text, new RendererOptions(font));
// text transformation:
var matrix = (angle == 0.0) ? Matrix3x2.Identity : Matrix3x2.CreateRotation((float)(angle * -2.0 * Math.PI / 360.0f));
matrix.Translation = new Vector2(x, y);
var path = new SixLabors.Shapes.PathBuilder(matrix).AddLine(0, 0, textsize.Width, 0).Build();
// draw the text:
// TODO: col < 0 => turn off antialiasing
img.Image.DrawText(text, font, FromRGBA(Math.Abs(color)), path);
// calculate drawen text boundaries:
var pts = new Vector2[]
{
new Vector2(0, textsize.Height), // lower left
new Vector2(textsize.Width, textsize.Height), // lower right
new Vector2(textsize.Width, 0), // upper right
new Vector2(0, 0), // upper left
};
for (int i = 0; i < pts.Length; i++)
{
pts[i] = Vector2.Transform(pts[i], matrix);
}
return(new PhpArray(8)
{
pts[0].X,
pts[0].Y,
pts[1].X,
pts[1].Y,
pts[2].X,
pts[2].Y,
pts[3].X,
pts[3].Y,
});
}