perf: Render half the amount of characters

Reduced the needed amount of characters for rendering a scene by half,
by using ▄ character.

src/main/java/cz/jzitnik/events/RerenderScreen.java

@@ -26,7 +26,7 @@ public record RerenderScreen(ScreenPart[] parts) implements Event {
         public static ScreenPart full(TerminalSize terminalSize) {
             return new ScreenPart(
                     new TerminalPosition(0, 0),
-                    new TerminalPosition(terminalSize.getColumns() - 1, terminalSize.getRows() - 1)
+                    new TerminalPosition(terminalSize.getColumns() - 1, terminalSize.getRows() * 2 - 1)
             );
         }
 

src/main/java/cz/jzitnik/events/handlers/CliHandler.java

@@ -38,14 +38,26 @@ public class CliHandler extends AbstractEventHandler<RerenderScreen> {
 
         for (RerenderScreen.ScreenPart part : parts) {
             var start = part.getStart();
+            int startYNormalized = (start.getRow() / 2) * 2; // Round to multiple of 2 down
             var end = part.getEnd();
+            int endYNormalized = ((end.getRow() - 1) / 2) * 2; // Round to multiple of 2 ceil
 
-            for (int y = start.getRow(); y <= end.getRow(); y++) {
+            for (int y = startYNormalized; y <= endYNormalized; y += 2) {
                 for (int x = start.getColumn(); x <= end.getColumn(); x++) {
-                    Pixel pixel = buffer[y][x];
+                    Pixel topPixel = buffer[y][x];
-                    TextColor color = pixel.getClass().equals(Empty.class) ? Constants.DEFAULT_COLOR : pixel.getColor();
+                    Pixel bottomPixel = (y + 1 <= end.getRow())
+                            ? buffer[y + 1][x]
+                            : new Empty();
 
-                    drawPixel(tg, x, y, color);
+                    TextColor topColor = topPixel instanceof Empty
+                            ? Constants.DEFAULT_COLOR
+                            : topPixel.getColor();
+
+                    TextColor bottomColor = bottomPixel instanceof Empty
+                            ? Constants.DEFAULT_COLOR
+                            : bottomPixel.getColor();
+
+                    drawHalfPixel(tg, x, y / 2, topColor, bottomColor);
                 }
             }
         }
@@ -57,8 +69,11 @@ public class CliHandler extends AbstractEventHandler<RerenderScreen> {
         }
     }
 
-    private void drawPixel(TextGraphics tg, int x, int y, TextColor color) {
+    private void drawHalfPixel(TextGraphics tg, int x, int y,
-        tg.setForegroundColor(color);
+                               TextColor topColor,
-        tg.setCharacter(x, y, '█');
+                               TextColor bottomColor) {
+        tg.setBackgroundColor(topColor);     // upper half
+        tg.setForegroundColor(bottomColor);  // lower half
+        tg.setCharacter(x, y, '▄');
     }
 }

src/main/java/cz/jzitnik/events/handlers/FullRoomDrawHandler.java

@@ -93,21 +93,18 @@ public class FullRoomDrawHandler extends AbstractEventHandler<FullRoomDraw> {
                 int green = (pixel >> 8) & 0xff;
                 int blue = pixel & 0xff;
 
-                Pixel overridePixelLeft = overrideBuffer[y][x * 2];
+                Pixel overridePixel = overrideBuffer[y][x];
-                Pixel overridePixelRight = overrideBuffer[y][x * 2 + 1];
                 Pixel pixel1 = new ColoredPixel(new TextColor.RGB(red, green, blue));
 
-                Pixel finalPixelLeft = overridePixelLeft.getClass() == Empty.class || pixelResult.isPlayer() ? pixel1 : overridePixelLeft;
+                Pixel finalPixelLeft = overridePixel.getClass() == Empty.class || pixelResult.isPlayer() ? pixel1 : overridePixel;
-                Pixel finalPixelRight = overridePixelRight.getClass() == Empty.class || pixelResult.isPlayer() ? pixel1 : overridePixelRight;
 
-                buffer[y + startY][x * 2 + startX] = finalPixelLeft;
+                buffer[y + startY][x + startX] = finalPixelLeft;
-                buffer[y + startY][x * 2 + 1 + startX] = finalPixelRight;
             }
         }
 
         partsToRerender.add(new RerenderScreen.ScreenPart(
                 new TerminalPosition(startX, startY),
-                new TerminalPosition(startX + width * 2, startY + height - 1)
+                new TerminalPosition(startX + width, startY + height - 1)
         ));
 
         if (renderState.isFirstRender() || event.isFullRerender()) {

src/main/java/cz/jzitnik/events/handlers/MouseMoveEventHandler.java

@@ -67,10 +67,10 @@ public class MouseMoveEventHandler extends AbstractEventHandler<MouseMoveEvent>
             BufferedImage texture = gameObject.getTexture();
             RoomCords cords = gameObject.getCords();
             return
-                    (mouseX - startX) / 2 >= cords.getX() &&
+                    mouseX - startX >= cords.getX() &&
-                    (mouseX - startX) / 2 < cords.getX() + texture.getWidth() &&
+                    mouseX - startX < cords.getX() + texture.getWidth() &&
-                    mouseY >= cords.getY() + startY &&
+                    (mouseY * 2 - startY) >= cords.getY() &&
-                    mouseY < cords.getY() + startY + texture.getHeight();
+                    (mouseY * 2 - startY)  < cords.getY() + texture.getHeight();
         }).collect(Collectors.toSet());
 
         Set<GameObject> changedObjects = new HashSet<>();
@@ -96,7 +96,7 @@ public class MouseMoveEventHandler extends AbstractEventHandler<MouseMoveEvent>
             int forStartX = cords.getX();
             int forStartY = cords.getY();
             int forEndX = cords.getX() + objectTexture.getWidth() - 1;
-            int forEndY = cords.getY() + objectTexture.getHeight() - 1;
+            int forEndY = cords.getY() + objectTexture.getHeight();
 
             RerenderUtils.rerenderPart(
                     forStartX,

src/main/java/cz/jzitnik/events/handlers/PlayerMoveEventHandler.java

@@ -111,7 +111,7 @@ public class PlayerMoveEventHandler extends AbstractEventHandler<PlayerMoveEvent
         eventManager.emitEvent(new RerenderScreen(
                 new RerenderScreen.ScreenPart(
                         new TerminalPosition(forStartX + startX, forStartY + startY),
-                        new TerminalPosition(forEndX * 2 + 1 + startX, forEndY + startY)
+                        new TerminalPosition(forEndX + 1 + startX, forEndY + startY)
                 )
         ));
     }

src/main/java/cz/jzitnik/events/handlers/TerminalResizeEventHandler.java

@@ -35,7 +35,7 @@ public class TerminalResizeEventHandler extends AbstractEventHandler<TerminalRes
     public void handle(TerminalResizeEvent event) {
         TerminalSize size = event.getNewSize();
         int width = size.getColumns();
-        int height = size.getRows();
+        int height = size.getRows() * 2;
 
         Pixel[][] buffer = new Pixel[height][width];
         for (int x = 0; x < width; x++) {

src/main/java/cz/jzitnik/game/GameSetup.java

@@ -31,6 +31,7 @@ public class GameSetup {
         Chest chest = new Chest(dependencyManager, resourceManager, new RoomCords(100, 45), new GameItem[]{
                 new WoodenSword(resourceManager),
                 new WoodenSword(resourceManager),
+                new WoodenSword(resourceManager),
         });
         mainRoom.addObject(chest);
 

src/main/java/cz/jzitnik/game/objects/Chest.java

@@ -74,12 +74,14 @@ public final class Chest extends GameObject implements Interactable, UIClickHand
 
         int itemCount = items.size();
 
-        int chestUIStartX = getCords().getX() * 2;
+        int chestUIStartX = getCords().getX();
         int chestUIStartY = getCords().getY();
+
         int chestUISizeY = 16 + 4;
-        int chestUISizeX = 8 + itemCount * 32 + (itemCount - 1) * 2;
+        int chestUISizeX = 8 + itemCount * 16 + (itemCount - 1);
+
         int chestGUIStartY = chestUIStartY - chestUISizeY - 1;
-        int chestGUIStartX = chestUIStartX + chest.getWidth() - (chestUISizeX / 2);
+        int chestGUIStartX = chestUIStartX + (chest.getWidth() / 2) - (chestUISizeX / 2);
 
         TerminalPosition guiStart = new TerminalPosition(chestGUIStartX / 2, chestGUIStartY);
         TerminalPosition guiEnd = new TerminalPosition((chestGUIStartX + chestUISizeX - 1) / 2, ((chestGUIStartY + chestUISizeY - 1) / 2));

src/main/java/cz/jzitnik/utils/RerenderUtils.java

@@ -22,10 +22,10 @@ public class RerenderUtils {
     public static RoomCords getStart(BufferedImage room, TerminalSize terminalSize) {
         int width = room.getWidth();
         int height = room.getHeight();
-        int terminalHeight = terminalSize.getRows();
+        int terminalHeight = terminalSize.getRows() * 2;
         int terminalWidth = terminalSize.getColumns();
 
-        int x = (terminalWidth - (width * 2)) / 2;
+        int x = (terminalWidth - width) / 2;
         int y = (terminalHeight - height) / 2;
 
         return new RoomCords(x, y);
@@ -45,15 +45,12 @@ public class RerenderUtils {
                 int green = (pixel >> 8) & 0xff;
                 int blue = pixel & 0xff;
 
-                Pixel overridePixelLeft = overrideBuffer[y][x * 2];
+                Pixel overridePixel = overrideBuffer[y][x];
-                Pixel overridePixelRight = overrideBuffer[y][x * 2 + 1];
                 Pixel pixel1 = new ColoredPixel(new TextColor.RGB(red, green, blue));
 
-                Pixel finalPixelLeft = overridePixelLeft.getClass() == Empty.class || pixelResult.isPlayer() ? pixel1 : overridePixelLeft;
+                Pixel finalPixel = overridePixel.getClass() == Empty.class || pixelResult.isPlayer() ? pixel1 : overridePixel;
-                Pixel finalPixelRight = overridePixelRight.getClass() == Empty.class || pixelResult.isPlayer() ? pixel1 : overridePixelRight;
 
-                buffer[y + screenStartY][x * 2 + screenStartX] = finalPixelLeft;
+                buffer[y + screenStartY][x + screenStartX] = finalPixel;
-                buffer[y + screenStartY][x * 2 + 1 + screenStartX] = finalPixelRight;
             }
         }
     }