JAI Graphics2D.drawImage

[stefes007]

Hi, i'm writing an application that paint a TiledImage: this tiledimage is a background image where i want tu set different smaller images ( logos ) at different places.
here is the beginning of my method paint:

public void paint(TiledImage ti, Positioner pos){
Graphics g = ti.getGraphics();
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
String dir = Options.getHomeDir() + File.separator + "images" + File.separator + "symbols" + File.separator;

boolean aa = g2.drawImage(Toolkit.getDefaultToolkit().getImage(dir + "hail64p.gif&quot,70, 70, null);

this line doesn't work ( nothing is showed on that place )and aa is always false ( which mean it isn't still loaded )

I'm sure g2 is ok, because when I try this:

g2.setColor(Color.blue);
g2.drawString("testing drawstring",20,20);

it works... I don't understand the problem with drawImage. I've seen ( here:

http://java.sun.com/products/java-media/jai/jai-bugs-1_1.html

) that JAI has problems with gif with transparent background, so i made my gif with a non-transparent background, but it doesn't resolve my problems: i'm also sure that the Toolkit works, because i've seen it detect that my gif size ( 64*64). Does anyone knows when this bug will be repaired ?

Thanks in advance for your help !

 

[stefes007]

up

please, read-it, tell me sugestions ... It's very important !

 

[Guest_imported]

where do you call this paint method?

Remenber that if you want to update the contents of a component (in your case, update the image that is located in a determined swing/awt component) you must call your paint method from the event dispatching thread or from the component's paint method ( public void paint(graphics g)

I sugest you to call your paint method from the component's paint method :
public void paint(graphics g){
super.paint(g) // to clear the background. If you don´t do
// this the image inside the component
// maybe won´t be painted correctly

...
paint(tiledImage, positioner);
...
}

and whenever you want to call your paint method you must call component's repaint() method.

 

[stefes007]

Hi espanolito,

Thank you for you for your help.

I'm gonna try your method: for the moment, i've found another solution:

public void paint(TiledImage ti, Positioner pos){
Graphics g = ti.getGraphics();
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
String dir = Options.getHomeDir() + File.separator + "images" + File.separator + "symbols" + File.separator;

try {

ParameterBlock pb = new ParameterBlock();
ParameterBlock pb2 = (new ParameterBlock()).add(dir + "hail64p.gif"


PlanarImage img = JAI.create("fileload", pb2);

pb.addSource(img); // The source image
pb.add((float)1); // The xScale
pb.add((float)1); // The yScale

pb.add((float)1); // The x translation
pb.add((float)1); // The y translation

pb.add(new InterpolationBilinear()); // The interpolation

PlanarImage pi = (PlanarImage)JAI.create("scale", pb, null);

// Draw the buffer
ti.set(pi);