- MFB: #30229, fixed imagerectangle used with alpha channel

- MFB: imagefill, always restore the alphablending mode

ext/gd/libgd/gd.c

@@ -1882,14 +1882,24 @@ void gdImageFill(gdImagePtr im, int x, int y, int nc)
 	struct seg *stack;
 	struct seg *sp;
 
+	int alphablending_bak;
+
+	alphablending_bak = im->alphaBlendingFlag;	
+	im->alphaBlendingFlag = 0;
+
 	if (nc==gdTiled){
 		_gdImageFillTiled(im,x,y,nc);
+		im->alphaBlendingFlag = alphablending_bak;
 		return;
 	}
 
 	wx2=im->sx;wy2=im->sy;
 	oc = gdImageGetPixel(im, x, y);
-	if (oc==nc || x<0 || x>wx2 || y<0 || y>wy2) return;
+
+	if (oc==nc || x<0 || x>wx2 || y<0 || y>wy2) {
+		im->alphaBlendingFlag = alphablending_bak;	
+		return;
+	}
 
 	stack = (struct seg *)safe_emalloc(sizeof(struct seg), ((int)(im->sy*im->sx)/4), 1);
 	sp = stack;
@@ -1929,6 +1939,7 @@ skip:			for (x++; x<=x2 && (gdImageGetPixel(im, x, y)!=oc); x++);
 		} while (x<=x2);
 	}
 	efree(stack);
+	im->alphaBlendingFlag = alphablending_bak;
 }
 
 void _gdImageFillTiled(gdImagePtr im, int x, int y, int nc)
@@ -2013,31 +2024,78 @@ skip:			for (x++; x<=x2 && (pts[y][x] || gdImageGetPixel(im,x, y)!=oc); x++);
 }
 
 
-
 void gdImageRectangle (gdImagePtr im, int x1, int y1, int x2, int y2, int color)
 {
 	int x1h = x1, x1v = x1, y1h = y1, y1v = y1, x2h = x2, x2v = x2, y2h = y2, y2v = y2;
 	int thick = im->thick;
+	int half1 = 1;
+	int t;
+
+	if (y2 < y1) {
+		t=y1;
+		y1 = y2;
+		y2 = t;
 
+		t = x1;
+		x1 = x2;
+		x2 = t;
+	}
+
+	x1h = x1; x1v = x1; y1h = y1; y1v = y1; x2h = x2; x2v = x2; y2h = y2; y2v = y2;
 	if (thick > 1) {
-		int half = thick / 2;
-		int half1 = thick - half;
+		int cx, cy, x1ul, y1ul, x2lr, y2lr;
+		int half = thick >> 1;
+		half1 = thick - half;
+		x1ul = x1 - half;
+		y1ul = y1 - half;
+
+		x2lr = x2 + half;
+		y2lr = y2 + half;
 
-		if (y1 < y2) {
-			y1v = y1h - half;
-			y2v = y2h + half1 - 1;
-		} else {
-			y1v = y1h + half1 - 1;
-			y2v = y2h - half;
+		cy = y1ul + thick;
+		while (cy-- > y1ul) {
+			cx = x1ul - 1;
+			while (cx++ < x2lr) {
+				gdImageSetPixel(im, cx, cy, color);
+			}
 		}
-	}
 
-	gdImageLine(im, x1h, y1h, x2h, y1h, color);
-	gdImageLine(im, x1h, y2h, x2h, y2h, color);
-	gdImageLine(im, x1v, y1v, x1v, y2v, color);
-	gdImageLine(im, x2v, y1v, x2v, y2v, color);
+		cy = y2lr - thick;
+		while (cy++ < y2lr) {
+			cx = x1ul - 1;
+			while (cx++ < x2lr) {
+				gdImageSetPixel(im, cx, cy, color);
+			}
+		}
+
+		cy = y1ul + thick - 1;
+		while (cy++ < y2lr -thick) {
+			cx = x1ul - 1;
+			while (cx++ < x1ul + thick) {
+				gdImageSetPixel(im, cx, cy, color);
+			}
+		}
+
+		cy = y1ul + thick - 1;
+		while (cy++ < y2lr -thick) {
+			cx = x2lr - thick - 1;
+			while (cx++ < x2lr) {
+				gdImageSetPixel(im, cx, cy, color);
+			}
+		}
+
+		return;
+	} else {
+		y1v = y1h + 1;
+		y2v = y2h - 1;
+		gdImageLine(im, x1h, y1h, x2h, y1h, color);
+		gdImageLine(im, x1h, y2h, x2h, y2h, color);
+		gdImageLine(im, x1v, y1v, x1v, y2v, color);
+		gdImageLine(im, x2v, y1v, x2v, y2v, color);
+	}
 }
 
+
 void gdImageFilledRectangle (gdImagePtr im, int x1, int y1, int x2, int y2, int color)
 {
 	int x, y;