HiDPI fix

Issue:
When using XLog in a HiDPI environment with the -Dswt.autoScale=quarter option added to the scouter.ini file, the graphs appear blurry.
This is because when drawing a point using the drawPoint method in a HiDPI environment, the pixel is enlarged to become opaque.

Solution:
The issue has been resolved by modifying the code to draw graphs using rectangles instead of points using the fillRectangle method.

Additional Details:
The -Dswt.autoScale=quarter option is automatically selects the appropriate HiDPI ratio.
The drawPoint method draws individual pixels, which can appear blurry when scaled up.
The fillRectangle function draws filled rectangles, which provide a smoother and more consistent appearance in HiDPI environments.

Author: ESPINS

scouter.client/src/scouter/client/xlog/ImageCache.java

@@ -61,7 +61,7 @@ public synchronized Image getXPImage(int objHash, byte xtype) {
 	}
 
 	private Image createXPImage(RGB rgb) {
-		return createXPImage5(rgb);
+		return createXPImage6(rgb);
 	}
 
 	private Image createXPImage4(RGB rgb) {
@@ -98,6 +98,21 @@ private Image createXPImage5(RGB rgb) {
 		return xp;
 	}
 
+	private Image createXPImage6(RGB rgb) {
+		Image xp;
+		xp = new Image(null, 5, 5);
+		GC gcc = new GC(xp);
+		gcc.setBackground(new Color(null, rgb));
+		gcc.fillRectangle(0, 0, 5, 5);
+		gcc.setBackground(ColorUtil.getInstance().getColor("white"));
+		gcc.fillRectangle(1, 0, 1, 1);
+		gcc.fillRectangle(4, 1, 1, 1);
+		gcc.fillRectangle(0, 3, 1, 1);
+		gcc.fillRectangle(3, 4, 1, 1);
+		gcc.dispose();
+		return xp;
+	}
+
 	public synchronized Image getXPErrorImage(byte xtype) {
 		if (errorXpDot == null) {
 			errorXpDot = createXPImage(ColorUtil.getInstance().getColor("red").getRGB());