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();
}
*/
}
public static void main(String[] args) throws Exception {
Convolution[] filters = {
box, new Hanning(1), new Hanning(2), new Hamming(1), new Lanczos(2), new Lanczos(3),
};
// BufferedImage in = Resource.loadimg("gfx/invobjs/herbs/crowberry");
BufferedImage in = javax.imageio.ImageIO.read(new java.io.File("/tmp/e.jpg"));
Coord tsz = new Coord(300, 300);
for (int i = 0; i < filters.length; i++) {
long start = System.nanoTime();
BufferedImage out = convolvedown(in, tsz, filters[i]);
System.err.println(System.nanoTime() - start);
javax.imageio.ImageIO.write(out, "PNG", new java.io.File("/tmp/barda" + i + ".png"));
}
}
/**
* 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);
}
}
}