Setup framework for screen door transparency

Co-authored-by: r3cp3ct <45179536+r3cp3ct@users.noreply.github.com>
Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

src/sig/DrawLoop.java

@@ -164,48 +164,16 @@ public class DrawLoop {
 		boolean horizontal = transform==Transform.HORIZONTAL||transform==Transform.HORIZ_VERTIC;
 		boolean vertical = transform==Transform.VERTICAL||transform==Transform.HORIZ_VERTIC;
 		byte[] p = panel.pixel;
-		if (transform==Transform.NONE&&col==PaletteColor.NORMAL) {
+		int transparentTotalCount=alpha.getB();
+		int transparentRunCount=0;
 		for(int X=(int)xOffset;X<(int)(w+xOffset);X++){
 			for(int Y=(int)yOffset;Y<(int)(h+yOffset);Y++){
-					if (X+x-xOffset<0||Y+y-yOffset<0||X-xOffset+x>=RabiClone.BASE_WIDTH||Y-yOffset+y>=RabiClone.BASE_HEIGHT) {
-						continue;
-					} else {
-						int index = ((int)y)*RabiClone.BASE_WIDTH+(int)x;
-						if (sprite.getBi_array()[Y*sprite.getCanvasWidth()+X]==32||index<0||index>=p.length) {
-							continue;
-						} else {
-							Draw(p,index,sprite.getBi_array()[Y*sprite.getCanvasWidth()+X],alpha);	
-						}
-					}
-				}	
-			}
-		} else
-		if (col==PaletteColor.NORMAL) {
-			for(int X=(int)xOffset;X<(int)(w+xOffset);X++){
-				for(int Y=(int)yOffset;Y<(int)(h+yOffset);Y++){
-					if (X+x-xOffset<0||Y+y-yOffset<0||X-xOffset+x>=RabiClone.BASE_WIDTH||Y-yOffset+y>=RabiClone.BASE_HEIGHT) {
-						continue;
-					} else {
-						int index = 
-							((vertical?
-							sprite.getHeight()-(Y-(int)yOffset):
-							(Y-(int)yOffset))
-						+(int)y)*RabiClone.BASE_WIDTH+
-							(horizontal?
-							sprite.getWidth()-(X-(int)xOffset):
-							(X-(int)xOffset))
-						+(int)x;
-						if (sprite.getBi_array()[Y*sprite.getCanvasWidth()+X]==32||index<0||index>=p.length) {
+				if (alpha!=Alpha.ALPHA0) {
+					if (transparentRunCount++==transparentTotalCount) {
+						transparentRunCount=0;
 						continue;
-						} else {
-							Draw(p,index,sprite.getBi_array()[Y*sprite.getCanvasWidth()+X],alpha);	
-						}
 					}
 				}
-			}
-		} else {
-			for(int X=(int)xOffset;X<(int)(w+xOffset);X++){
-				for(int Y=(int)yOffset;Y<(int)(h+yOffset);Y++){
 				if (X+x-xOffset<0||Y+y-yOffset<0||X-xOffset+x>=RabiClone.BASE_WIDTH||Y-yOffset+y>=RabiClone.BASE_HEIGHT) {
 					continue;
 				} else {
@@ -218,11 +186,11 @@ public class DrawLoop {
 						sprite.getWidth()-(X-(int)xOffset):
 						(X-(int)xOffset))
 					+(int)x;
+
 					if (sprite.getBi_array()[Y*sprite.getCanvasWidth()+X]==32||index<0||index>=p.length) {
 						continue;
 					} else {
-							Draw(p,index,(byte)col.ordinal(),alpha);
-						}
+						Draw(p,index,(col==PaletteColor.NORMAL)?sprite.getBi_array()[Y*sprite.getCanvasWidth()+X]:(byte)col.ordinal(),alpha);	
 					}
 				}
 			}	

src/sig/engine/Alpha.java

@@ -1,13 +1,30 @@
 package sig.engine;
 
 public enum Alpha {
-    ALPHA0,
-    ALPHA32,
-    ALPHA64,
-    ALPHA96,
-    ALPHA128,
-    ALPHA160,
-    ALPHA192,
-    ALPHA224,
-    ALPHA256;
+    ALPHA0(1,1),
+    ALPHA32(7,8), //7/8
+    ALPHA64(3,4), //3/4
+    ALPHA96(5,8), //5/8
+    ALPHA128(1,2), //1/2
+    ALPHA160(3,8), //3/8
+    ALPHA192(1,4), //1/4
+    ALPHA224(1,8), //1/8
+    ALPHA256(0,8); //0/8
+
+    int A,B;
+
+    /** For every B pixels, A are visible.*/
+     Alpha(int A,int B) {
+        this.A=A;
+        this.B=B;
+     }
+
+    public int getA() {
+        return A;
+    }
+
+    public int getB() {
+        return B;
+    }
+     
 }