move SVG-File check out of JSVGRasterizer

The caller needs to make sure the method is called with an SVG file.

Author: Michael5601

bundles/org.eclipse.swt.svg/src/org/eclipse/swt/svg/JSVGRasterizer.java

@@ -63,24 +63,22 @@ public ImageData rasterizeSVG(byte[] bytes, float scalingFactor) throws IOExcept
 			svgLoader = new SVGLoader();
 		}
 		SVGDocument svgDocument = null;
-		if (isSVGFile(bytes)) {
-			try (InputStream stream = new ByteArrayInputStream(bytes)) {
-				svgDocument = svgLoader.load(stream, null, LoaderContext.createDefault());
-			}
-			if (svgDocument != null) {
-				FloatSize size = svgDocument.size();
-				double originalWidth = size.getWidth();
-				double originalHeight = size.getHeight();
-				int scaledWidth = (int) Math.round(originalWidth * scalingFactor);
-				int scaledHeight = (int) Math.round(originalHeight * scalingFactor);
-				BufferedImage image = new BufferedImage(scaledWidth, scaledHeight, BufferedImage.TYPE_INT_ARGB);
-				Graphics2D g = image.createGraphics();
-				g.setRenderingHints(RENDERING_HINTS);
-				g.scale(scalingFactor, scalingFactor);
-				svgDocument.render(null, g);
-				g.dispose();
-				return convertToSWT(image);
-			}
+		try (InputStream stream = new ByteArrayInputStream(bytes)) {
+			svgDocument = svgLoader.load(stream, null, LoaderContext.createDefault());
+		}
+		if (svgDocument != null) {
+			FloatSize size = svgDocument.size();
+			double originalWidth = size.getWidth();
+			double originalHeight = size.getHeight();
+			int scaledWidth = (int) Math.round(originalWidth * scalingFactor);
+			int scaledHeight = (int) Math.round(originalHeight * scalingFactor);
+			BufferedImage image = new BufferedImage(scaledWidth, scaledHeight, BufferedImage.TYPE_INT_ARGB);
+			Graphics2D g = image.createGraphics();
+			g.setRenderingHints(RENDERING_HINTS);
+			g.scale(scalingFactor, scalingFactor);
+			svgDocument.render(null, g);
+			g.dispose();
+			return convertToSWT(image);
 		}
 		return null;
 	}

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/ImageLoader.java

@@ -186,16 +186,18 @@ public ImageData[] load(InputStream stream, int zoom) {
 	}
 	SVGRasterizer rasterizer = SVGRasterizerRegistry.getRasterizer();
 	if (rasterizer != null && zoom != 0) {
-	    	float scalingFactor = zoom / 100.0f;
-			try {
+		try (InputStream imageStream = new ByteArrayInputStream(bytes)) {
+			if (rasterizer.isSVGFile(imageStream)) {
+				float scalingFactor = zoom / 100.0f;
 				ImageData rasterizedData = rasterizer.rasterizeSVG(bytes, scalingFactor);
 				if (rasterizedData != null) {
 					data = new ImageData[]{rasterizedData};
 				    return data;
 				}
-			} catch (IOException e) {
-				//ignore.
 			}
+		} catch (IOException e) {
+			//ignore.
+		}
 	}
 	try (InputStream fallbackStream = new ByteArrayInputStream(bytes)) {
 		return loadDefault(fallbackStream);