protected void createCanvas() {
// TODO take bgcolor and transparency from request into account
// should move this into a separate function
Color bgColor = null;
boolean transparent = true;
if (layer instanceof WMSLayer) {
WMSLayer wmsLayer = (WMSLayer) layer;
int[] colorAr = wmsLayer.getBackgroundColor();
if (colorAr != null) {
bgColor = new Color(colorAr[0], colorAr[1], colorAr[2]);
}
transparent = wmsLayer.getTransparent();
}
int canvasType;
if (bgColor == null
&& transparent
&& (outputFormat.supportsAlphaBit() || outputFormat.supportsAlphaChannel())) {
canvasType = BufferedImage.TYPE_INT_ARGB;
} else {
canvasType = BufferedImage.TYPE_INT_RGB;
if (bgColor == null) {
bgColor = Color.WHITE;
}
}
// Create the actual canvas and graphics object
canvas = new BufferedImage(canvasSize[0], canvasSize[1], canvasType);
gfx = (Graphics2D) canvas.getGraphics();
if (bgColor != null) {
gfx.setColor(bgColor);
gfx.fillRect(0, 0, canvasSize[0], canvasSize[1]);
}
}
