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with Sf.Window;
with Sf.Window.Event;
with Sf.Window.Keyboard;
with Sf.Graphics.Color;
with Sf.Graphics.Image;
with Sf.Graphics.RenderWindow;
with Sf.Graphics.Texture;
package body Video is
procedure Clear_Screen is
begin
for X in 0 .. Width - 1 loop
for Y in 0 .. Height - 1 loop
Image.setPixel (Pixels, X, Y, Color.sfBlack);
end loop;
end loop;
end Clear_Screen;
procedure Scroll_Right is
use Sf.Graphics.Color;
SS : constant sfUint32 := 4;
Tmp : array (0 .. SS - 1) of sfColor;
begin
for J in 0 .. Height - 1 loop
for I in 0 .. SS - 1 loop
Tmp (I) := Image.getPixel (Pixels, Width - SS + I, J);
end loop;
for I in 0 .. Width - 5 loop
Image.setPixel (Pixels, I + SS, J, Image.getPixel (Pixels, I, J));
end loop;
for I in 0 .. SS - 1 loop
Image.setPixel (Pixels, I, J, Tmp (I));
end loop;
end loop;
end Scroll_Right;
procedure Scroll_Left is
use Sf.Graphics.Color;
SS : constant sfUint32 := 4;
Tmp : array (0 .. SS - 1) of sfColor;
begin
for J in 0 .. Height - 1 loop
for I in 0 .. SS - 1 loop
Tmp (I) := Image.getPixel (Pixels, I, J);
end loop;
for I in SS .. Width - 1 loop
Image.setPixel (Pixels, I - SS, J, Image.getPixel (Pixels, I, J));
end loop;
for I in 0 .. SS - 1 loop
Image.setPixel (Pixels, Width - SS + I, J, Tmp (I));
end loop;
end loop;
end Scroll_Left;
procedure Low_Res is
begin
Video.Width := 64;
Video.Height := 32;
Video.Scale := 10;
Sprite.setScale (Pixels_Sprite, (Float (Scale), Float (Scale)));
end Low_Res;
procedure High_Res is
begin
Video.Width := 128;
Video.Height := 64;
Video.Scale := 5;
Sprite.setScale (Pixels_Sprite, (Float (Scale), Float (Scale)));
end High_Res;
procedure Initialize (M : Model) is
begin
case M is
when Chip_8 =>
Width := 64;
Height := 32;
Scale := 10;
when Super_Chip_10 =>
Width := 128;
Height := 64;
Scale := 5;
end case;
app := RenderWindow.create ((Width * Scale, Height * Scale, 32), Title);
Pixels := Image.create (Width, Height);
Pixels_Texture := Texture.createFromImage (Pixels);
Sprite.setTexture (Pixels_Sprite, Pixels_Texture);
Sprite.setPosition (Pixels_Sprite, (Float (0), Float (0)));
RenderWindow.setFramerateLimit (app, 60);
end Initialize;
function Is_Running return Boolean is
begin
return RenderWindow.isOpen (app) = sfTrue;
end Is_Running;
function Next_Key return Key is
begin
while Is_Running loop
Poll_Events;
for I in Key'First .. Key'Last loop
if Keys (I) then
return I;
end if;
end loop;
delay 0.016;
end loop;
return 0; -- Only get here on program exit
end Next_Key;
procedure Poll_Events is
use Sf.Window.Event;
use Sf.Window.Keyboard;
e : sfEvent;
begin
while RenderWindow.pollEvent (app, event => e) = sfTrue loop
case e.eventType is
when sfEvtClosed =>
RenderWindow.close (app);
when sfEvtKeyPressed => case e.key.code is
when sfKeyNum0 => Keys (0) := True;
when sfKeyNum1 => Keys (1) := True;
when sfKeyNum2 => Keys (2) := True;
when sfKeyNum3 => Keys (3) := True;
when sfKeyNum4 => Keys (4) := True;
when sfKeyNum5 => Keys (5) := True;
when sfKeyNum6 => Keys (6) := True;
when sfKeyNum7 => Keys (7) := True;
when sfKeyNum8 => Keys (8) := True;
when sfKeyNum9 => Keys (9) := True;
when sfKeyA => Keys (10) := True;
when sfKeyB => Keys (11) := True;
when sfKeyC => Keys (12) := True;
when sfKeyD => Keys (13) := True;
when sfKeyE => Keys (14) := True;
when sfKeyF => Keys (15) := True;
when others => null;
end case;
when sfEvtKeyReleased => case e.key.code is
when sfKeyNum0 => Keys (0) := False;
when sfKeyNum1 => Keys (1) := False;
when sfKeyNum2 => Keys (2) := False;
when sfKeyNum3 => Keys (3) := False;
when sfKeyNum4 => Keys (4) := False;
when sfKeyNum5 => Keys (5) := False;
when sfKeyNum6 => Keys (6) := False;
when sfKeyNum7 => Keys (7) := False;
when sfKeyNum8 => Keys (8) := False;
when sfKeyNum9 => Keys (9) := False;
when sfKeyA => Keys (10) := False;
when sfKeyB => Keys (11) := False;
when sfKeyC => Keys (12) := False;
when sfKeyD => Keys (13) := False;
when sfKeyE => Keys (14) := False;
when sfKeyF => Keys (15) := False;
when others => null;
end case;
when others => null;
end case;
end loop;
end Poll_Events;
procedure Display is
begin
RenderWindow.clear (app, Color.sfWhite);
Texture.updateFromImage (Pixels_Texture, Pixels, 0, 0);
RenderWindow.drawSprite (app, Pixels_Sprite);
RenderWindow.display (app);
end Display;
function Toggle_Pixel (X, Y : sfUint32) return Boolean is
use Color;
P : sfColor;
R : Boolean;
begin
P := Image.getPixel (Pixels, X, Y);
R := P = sfWhite;
Image.setPixel (Pixels, X, Y, (if R then sfBlack else sfWhite));
return R;
end Toggle_Pixel;
procedure Finish is
begin
RenderWindow.close (app);
end Finish;
function Key_Down (K : Key) return Boolean is
begin
return Keys (K);
end Key_Down;
function Key_Up (K : Key) return Boolean is
begin
return not Keys (K);
end Key_Up;
end Video;
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