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-- $Date: 2004/03/08 10:52:57 $
-- $Revision: 1.36 $
-- $Author: jcrocholl $
-- $Hash: 823f4df8c4900ca3137d3c14fed6ecbe $
-- This file was automatically created with ado.php.
-- Manual changes will be lost when it is updated.
with Render_Glyphs; use Render_Glyphs;
with Nocurves; use Nocurves;
with Integer_Vectors;
with Gray_Images; use Gray_Images;
package body Glyphs is
-- Constructor for instances.
function Create
return Glyph_Access -- The newly created glyph.
is
Result : Glyph_Access := new Glyph;
begin
Result.Outlines := Outline_Lists.Create;
return Result;
end Create;
-- Accessor to read the bounds of a glyph.
function Get_Bounds
(This : access Glyph) -- The glyph to read from.
return Rectangle is -- The bounds of that glyph.
begin
return This.Bounds;
end Get_Bounds;
-- Accessor to read the outlines of a glyph.
function Get_Outlines
(This : access Glyph) -- The glyph to read from.
return Outline_List_Access is -- The outlines of that glyph.
begin
return This.Outlines;
end Get_Outlines;
-- Add an outline to a glyph.
procedure Add_Outline
(This : access Glyph; -- The glyph object instance.
Add : in Outline_Access) is -- Add this outline to the glyph.
begin
Outline_Lists.Push(This.Outlines, Add);
end Add_Outline;
-- Make sure that the cached raster image is up to date.
procedure Update_Image
(This : access Glyph; -- The glyph object instance.
Staff_Height : in Real; -- Zoom factor.
Aspect_Ratio : in Real; -- Extra horizontal zoom factor.
Anti_Alias : in Positive) is -- Factor for vertical anti-alias.
begin
if This.Image = null
or else This.Image.Staff_Height /= Staff_Height
or else This.Image.Aspect_Ratio /= Aspect_Ratio
or else This.Image.Anti_Alias /= Anti_Alias
then
Make_Straight(This, 0.1);
This.Image := Render(This, Staff_Height, Aspect_Ratio, Anti_Alias);
end if;
end Update_Image;
-- Get a raster image of this glyph. Create one if not cached.
function Get_Image
(This : access Glyph; -- The glyph object instance.
Staff_Height : in Real; -- Zoom factor.
Aspect_Ratio : in Real; -- Extra horizontal zoom factor.
Anti_Alias : in Positive) -- Factor for vertical anti-alias.
return Glyph_Image_Access is -- The image of the glyph.
begin
Update_Image(This, Staff_Height, Aspect_Ratio, Anti_Alias);
return This.Image;
end Get_Image;
-- Update the bounding box of the glyph.
procedure Set_Bounds
(This : access Glyph; -- The glyph object instance.
Left, Top : in Real; -- Coordinate minima.
Right, Bottom : in Real) is -- Coordinate maxima.
begin
This.Bounds := Rectangle'(Left, Top, Right, Bottom);
end Set_Bounds;
-- Calculate the width of this glyph's bounding box.
function Get_Width
(This : access Glyph) -- The glyph object instance.
return Real is -- The width of the glyph.
begin
return Get_Width(This.Bounds);
end Get_Width;
-- Calculate the height of this glyph's bounding box.
function Get_Height
(This : access Glyph) -- The glyph object instance.
return Real is -- The height of the glyph.
begin
return Get_Height(This.Bounds);
end Get_Height;
procedure Print
(This : access Glyph; -- The glyph object instance.
Image : access Glyph_Image; -- Render into this image.
Center : in Vector) -- Pixel center coordinates.
is
Target : Integer_Vectors.Vector;
begin
Update_Image(This, Image.Staff_Height, Image.Aspect_Ratio, Image.Anti_Alias);
for Y in This.Image.Pixels'Range(1) loop
Target.Y := Integer(Center.Y * Image.Staff_Height / 400.0 +
Real(Y) + Image.Center.Y - This.Image.Center.Y);
if Target.Y in Image.Pixels'Range(1) then
for X in This.Image.Pixels'Range(2) loop
Target.X := Integer(Center.X * Image.Staff_Height / 400.0 +
Real(X) + Image.Center.X - This.Image.Center.X);
if Target.X in Image.Pixels'Range(2) then
if Darker(This.Image.Pixels(Y, X), Image.Pixels(Target.Y, Target.X)) then
Image.Pixels(Target.Y, Target.X) := This.Image.Pixels(Y, X);
end if;
end if;
end loop;
end if;
end loop;
end Print;
end Glyphs;