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-- Draw_String --
-----------------
procedure Draw_String
(Buffer : in out Bitmap_Buffer'Class;
Area : Rect;
Msg : String;
Font : Hershey_Font;
Bold : Boolean;
Outline : Boolean;
Foreground : Bitmap_Color;
Fast : Boolean := True)
is
Length : constant Natural :=
Hershey_Fonts.Strlen (Msg, Font, Area.Height);
Ratio : Float;
Current : Point := (0, 0);
Prev : UInt32;
FG : constant UInt32 := Bitmap_Color_To_Word (Buffer.Color_Mode,
Foreground);
Blk : constant UInt32 := Bitmap_Color_To_Word (Buffer.Color_Mode,
Black);
procedure Internal_Draw_Line
(X0, Y0, X1, Y1 : Natural;
Width : Positive);
procedure Internal_Draw_Line
(X0, Y0, X1, Y1 : Natural;
Width : Positive)
is
begin
Draw_Line (Buffer,
(Area.Position.X + Natural (Float (X0) * Ratio),
Area.Position.Y + Y0),
(Area.Position.X + Natural (Float (X1) * Ratio),
Area.Position.Y + Y1),
Width,
Fast);
end Internal_Draw_Line;
procedure Draw_Glyph is new Hershey_Fonts.Draw_Glyph
(Internal_Draw_Line);
begin
if Length > Area.Width then
Ratio := Float (Area.Width) / Float (Length);
else
Ratio := 1.0;
Current.X := (Area.Width - Length) / 2;
end if;
Buffer.Set_Source (Foreground);
for C of Msg loop
Draw_Glyph
(Fnt => Font,
C => C,
X => Current.X,
Y => Current.Y,
Height => Area.Height,
Bold => Bold);
end loop;
if Outline and then Area.Height > 40 then
for Y in Area.Position.Y + 1 .. Area.Position.Y + Area.Height loop
Prev := Buffer.Pixel ((Area.Position.X, Y));
if Prev = FG then
Buffer.Set_Pixel ((Area.Position.X, Y), Black);
end if;
for X in Area.Position.X + 1 .. Area.Position.X + Area.Width loop
declare
Col : constant UInt32 := Buffer.Pixel ((X, Y));
Top : constant UInt32 := Buffer.Pixel ((X, Y - 1));
begin
if Prev /= FG
and then Col = FG
then
Buffer.Set_Pixel ((X, Y), Blk);
elsif Prev = FG
and then Col /= FG
then
Buffer.Set_Pixel ((X - 1, Y), Blk);
elsif Top /= FG
and then Top /= Blk
and then Col = FG
then
Buffer.Set_Pixel ((X, Y), Blk);
elsif Top = FG
and then Col /= FG
then
Buffer.Set_Pixel ((X, Y - 1), Blk);
end if;
Prev := Col;