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with Sf.Window;
with Sf.Window.Event;
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
Last_Key := Unknown;
while Is_Running and then Last_Key = Unknown loop
Poll_Events;
delay 0.016;
end loop;
return Last_Key;
end Next_Key;
procedure Poll_Events is
use Sf.Window.Event;
e : sfEvent;
begin
while RenderWindow.pollEvent (app, event => e) = sfTrue loop
case e.eventType is
when sfEvtClosed =>
RenderWindow.close (app);
when sfEvtKeyPressed =>
Last_Key := Translate_Scancode (e.key.scancode);
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 isScancodePressed (Key_Conv (K)) = sfTrue;
end Key_Down;
function Key_Up (K : Key) return Boolean is
begin
return not Key_Down (K);
end Key_Up;
function Translate_Key (K : Key) return sfScancode is
begin
return Key_Conv (K);
end Translate_Key;
function Translate_Scancode (S : sfScancode) return Key
is begin
for I in Key_Map'Range loop
if Key_Conv (I) = S then
return I;
end if;
end loop;
return Unknown;
end Translate_Scancode;
end Video;
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