/**
* Create GLImage from image file bytes (the contents of a jpg, gif or png file). Flip Y axis.
*
* @param pixels
* @param w
* @param h
*/
public GLImage(byte[] bytes) {
BufferedImage img = makeBufferedImage(bytes);
if (makeGLImage(img, true, false)) {
GLApp.msg("GLImage(byte[]): loaded image from bytes[" + bytes.length + "]");
} else {
GLApp.err("GLImage(byte[]): could not create Image from bytes[" + bytes.length + "]");
}
}
/**
* Create GLImage from image file bytes (the contents of a jpg, gif or png file).
*
* @param pixels
* @param w
* @param h
*/
public GLImage(byte[] bytes, boolean flipYaxis, boolean convertPow2) {
BufferedImage img = makeBufferedImage(bytes);
if (makeGLImage(img, flipYaxis, convertPow2)) {
GLApp.msg("GLImage(byte[],bool,bool): loaded image from bytes[" + bytes.length + "]");
} else {
GLApp.err(
"GLImage(byte[],bool,bool): could not create Image from bytes[" + bytes.length + "]");
}
}
/**
* Load a BufferedImage from the given image file name. File can be in the local filesytem, in the
* applet folder, or in a jar.
*/
public BufferedImage loadJavaImage(String imgName) {
BufferedImage tmpi = null;
try {
tmpi = ImageIO.read(GLApp.getInputStream(imgName));
} catch (Exception e) {
GLApp.err("GLImage.loadJavaImage() exception: FAILED TO LOAD IMAGE " + e);
}
return tmpi;
}
/**
* Make a BufferedImage from the contents of an image file.
*
* @param imageFileContents byte array containing the guts of a JPG, GIF, or PNG
*/
public BufferedImage makeBufferedImage(byte[] imageFileContents) {
BufferedImage bi = null;
try {
InputStream in = new ByteArrayInputStream(imageFileContents);
bi = javax.imageio.ImageIO.read(in);
} catch (IOException ioe) {
GLApp.err("GLImage.makeBufferedImage(): " + ioe);
}
return bi;
}
/**
* Return the Image pixels in default Java int ARGB format.
*
* @return
*/
public static int[] getImagePixels(Image image) {
int[] pixelsARGB = null;
if (image != null) {
int imgw = image.getWidth(null);
int imgh = image.getHeight(null);
pixelsARGB = new int[imgw * imgh];
PixelGrabber pg = new PixelGrabber(image, 0, 0, imgw, imgh, pixelsARGB, 0, imgw);
try {
pg.grabPixels();
} catch (Exception e) {
GLApp.err("Pixel Grabbing interrupted!");
return null;
}
}
return pixelsARGB;
}
/**
* Save an array of ARGB pixels to a PNG file. If flipY is true, flip the pixels on the Y axis
* before saving.
*/
public static void savePixelsToPNG(
int[] pixels, int width, int height, String imageFilename, boolean flipY) {
if (pixels != null && imageFilename != null) {
if (flipY) {
// flip the pixels vertically (opengl has 0,0 at lower left, java is upper left)
pixels = GLImage.flipPixels(pixels, width, height);
}
try {
// Create a BufferedImage with the RGB pixels then save as PNG
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
image.setRGB(0, 0, width, height, pixels, 0, width);
javax.imageio.ImageIO.write(image, "png", new File(imageFilename));
} catch (Exception e) {
GLApp.err("GLImage.savePixelsToPNG(" + imageFilename + "): exception " + e);
}
}
}
