public void saveFrametoPNG(String filename) {
final int frameWidth = _canvas.getWidth();
final int frameHeight = _canvas.getHeight();
final ByteBuffer pixelsRGB = Direct.newByteBuffer(frameWidth * frameHeight * 3);
_canvas.runWithContext(
new Runnable() {
public void run() {
// glPushAttrib(GL_PIXEL_MODE_BIT);
glReadBuffer(GL_BACK);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, frameWidth, frameHeight, GL_RGB, GL_UNSIGNED_BYTE, pixelsRGB);
// glPopAttrib();
}
});
int[] pixelInts = new int[frameWidth * frameHeight];
int p = frameWidth * frameHeight * 3;
int q; // Index into ByteBuffer
int i = 0; // Index into target int[]
int w3 = frameWidth * 3; // Number of bytes in each row
for (int row = 0; row < frameHeight; row++) {
p -= w3;
q = p;
for (int col = 0; col < frameWidth; col++) {
int iR = pixelsRGB.get(q++);
int iG = pixelsRGB.get(q++);
int iB = pixelsRGB.get(q++);
pixelInts[i++] =
0xFF000000 | ((iR & 0x000000FF) << 16) | ((iG & 0x000000FF) << 8) | (iB & 0x000000FF);
}
}
// Create a new BufferedImage from the pixeldata.
BufferedImage bufferedImage =
new BufferedImage(frameWidth, frameHeight, BufferedImage.TYPE_INT_ARGB);
bufferedImage.setRGB(0, 0, frameWidth, frameHeight, pixelInts, 0, frameWidth);
try {
javax.imageio.ImageIO.write(bufferedImage, "PNG", new File(filename));
} catch (IOException e) {
System.out.println("Error: ImageIO.write.");
e.printStackTrace();
}
/* End code taken from: http://www.felixgers.de/teaching/jogl/imagingProg.html */
/*
final BufferedImage image = new BufferedImage(
this.getWidth(), this.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics gr = image.getGraphics();
this.printAll(gr);
gr.dispose();
try {
ImageIO.write(image, "PNG", new File(filename));
} catch (IOException e) {
System.out.println( "Error: ImageIO.write." );
e.printStackTrace();
}
*/
}
/** Do screen capture and save it as image */
private static void captureScreenAndSave() {
try {
Robot robot = new Robot();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle rectangle = new Rectangle(0, 0, screenSize.width, screenSize.height);
System.out.println("About to screen capture - " + rectangle);
java.awt.image.BufferedImage image = robot.createScreenCapture(rectangle);
javax.imageio.ImageIO.write(image, "jpg", new java.io.File("ScreenImage.jpg"));
robot.delay(3000);
} catch (Throwable t) {
System.out.println("WARNING: Exception thrown while screen capture!");
t.printStackTrace();
}
}
