Example usage for org.lwjgl.opengl GL11 glReadPixels

Introduction

In this page you can find the example usage for org.lwjgl.opengl GL11 glReadPixels.

Prototype

public static void glReadPixels(@NativeType("GLint") int x, @NativeType("GLint") int y,
        @NativeType("GLsizei") int width, @NativeType("GLsizei") int height, @NativeType("GLenum") int format,
        @NativeType("GLenum") int type, @NativeType("void *") float[] pixels) 

Source Link

Document

Array version of: #glReadPixels ReadPixels

Usage

From source file:loon.core.graphics.opengl.LWjglGL10.java

License:Apache License

public final void glReadPixels(int x, int y, int width, int height, int format, int type, Buffer pixels) {
    if (pixels instanceof ByteBuffer) {
        GL11.glReadPixels(x, y, width, height, format, type, (ByteBuffer) pixels);
    } else if (pixels instanceof ShortBuffer) {
        GL11.glReadPixels(x, y, width, height, format, type, (ShortBuffer) pixels);
    } else if (pixels instanceof IntBuffer) {
        GL11.glReadPixels(x, y, width, height, format, type, (IntBuffer) pixels);
    } else if (pixels instanceof FloatBuffer) {
        GL11.glReadPixels(x, y, width, height, format, type, (FloatBuffer) pixels);
    } else {/*from   w  w w .  j  a  v a  2 s.co  m*/
        throw new RuntimeException("Can't use " + pixels.getClass().getName()
                + " with this method. Use ByteBuffer, ShortBuffer, IntBuffer or FloatBuffer instead. Blame LWJGL");
    }
}

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From source file:minebot.ui.Screenshot.java

public static void screenshot() {
    if (currPixVal != null) {
        System.out.println("Skipping");
        return;/*from  w  w w .  j  a v  a2  s .  c om*/
    }
    int width = Minecraft.theMinecraft.displayWidth;
    int height = Minecraft.theMinecraft.displayHeight;
    int i = width * height;
    final IntBuffer pixelBuffer = getBuf(i);
    GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1);
    GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1);
    GL11.glReadPixels(0, 0, width, height, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, pixelBuffer);
    new Thread() {
        @Override
        public void run() {
            int[] pixelValues = getInt(i);
            pixelBuffer.get(pixelValues);
            TextureUtil.processPixelValues(pixelValues, width, height);
            /*BufferedImage bufferedimage;
             bufferedimage = new BufferedImage(width, height, 1);
             bufferedimage.setRGB(0, 0, width, height, pixelValues, 0, width);*/
            pushBuf(pixelBuffer);
            boolean hasSockets;
            synchronized (socketsLock) {
                hasSockets = !sockets.isEmpty();
            }
            if (!hasSockets) {
                pushInt(pixelValues);
                return;
            }
            synchronized (currPixLock) {
                if (currPixVal != null) {
                    pushInt(currPixVal);
                }
                currPixVal = pixelValues;
                currWidth = width;
                currHeight = height;
            }
        }
    }.start();
}

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From source file:mss.View.java

License:Open Source License

private void saveScreenshot() {
    final File f = new File(View.class.getProtectionDomain().getCodeSource().getLocation().getPath());
    GL11.glReadBuffer(GL11.GL_FRONT);// ww w .j  a v  a 2s  . co  m
    int width = Display.getWidth();
    int height = Display.getHeight();
    ByteBuffer byteBuffer = BufferUtils.createByteBuffer(width * height * 4);
    GL11.glReadPixels(0, 0, width, height, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, byteBuffer);
    ScreenshotSaver saver = new ScreenshotSaver(byteBuffer, f.getParent(), width, height);
    saver.start();
}

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From source file:mwisbest.openbase.opengl.UtilsGL.java

License:Open Source License

public static void takeScreenshot(String filename) {
    GL11.glReadBuffer(GL11.GL_FRONT);//from w w w .  j  a  v  a2s  .  c om
    int width = Display.getDisplayMode().getWidth();
    int height = Display.getDisplayMode().getHeight();
    int bpp = 4;
    ByteBuffer buffer = BufferUtils.createByteBuffer(width * height * bpp);
    GL11.glReadPixels(0, 0, width, height, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buffer);
    File file = new File(filename);
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

    for (int x = 0; x < width; x++) {
        for (int y = 0; y < height; y++) {
            int i = (x + width * y) * bpp;
            int r = buffer.get(i) & 0xFF;
            int g = buffer.get(i + 1) & 0xFF;
            int b = buffer.get(i + 2) & 0xFF;
            image.setRGB(x, height - (y + 1), 0xFF << 24 | r << 16 | g << 8 | b);
        }
    }

    try {
        ImageIO.write(image, "PNG", file);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

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From source file:opengl.Player.java

public void CheckDown() {

    if (Jumping == false) {
        FloatBuffer MatrixData = BufferUtils.createFloatBuffer(16);
        float[] Matrix = new float[16];
        MatrixData.rewind();//from w  ww .  j a  va2s .co m
        GL11.glGetFloat(GL11.GL_MODELVIEW_MATRIX, MatrixData);
        MatrixData.get(Matrix);
        for (int www = 0; Matrix.length > www; www++) {
            //System.out.print(Matrix[www] + " ");
        }
        //System.out.println();
        float Offset = 0;
        boolean z = false;
        FloatBuffer DATA = BufferUtils.createFloatBuffer(4);
        for (Offset = 0.0f; ScaleX >= Offset; Offset = Offset + 2.0f / 1920.0f) {
            DATA.rewind();
            GL11.glReadPixels((int) ((x + 1.0f + Matrix[12] + Offset) * 960.0f),
                    (int) (((y + 1.0f - (2.0f / 1080.0f))) * 540.0f - 20.0f), 1, 1, GL11.GL_RGBA, GL11.GL_FLOAT,
                    DATA); // 2/1920  // 2/1080
            //GL11.glReadPixels((int) ((-0.6f + 1.0f + Offset) * 960.0f), (int) (((-0.95f + 1.0f - (2.0f / 1080.0f))) * 540.0f ), 1, 1, GL11.GL_RGBA, GL11.GL_FLOAT, DATA);
            if (DATA.get() == 0.0f) {
                z = true;
            } else {
                Time = 0;
                HowFarUp = 0;
                z = false;
                break;
            }

        }
        if (z == true) {
            Time = Time + 1.0f / 60.0f;
            y = y - (2.0f / 1080.0f) * (Gravity * Time);
        }
    } else {

        Time = Time + 1.0f / 60.0f;
        v = (Gravity * Time - InitialJumpingV) * -1;
        HowFarUp++;
        if (v > 0) {
            y = y + (2.0f / 1080.0f) * v;
        } else {
            //HowFarUp = 0;
            Time = 0;
            Jumping = false;
        }

    }
}

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From source file:org.eclipse.swt.snippets.Snippet341.java

License:Open Source License

static void capture(GLCanvas glCanvas) {
    final int PAD = 4;
    Display display = glCanvas.getDisplay();
    Rectangle bounds = glCanvas.getBounds();
    int size = bounds.width * PAD * bounds.height;

    ByteBuffer buffer = ByteBuffer.allocateDirect(size);
    GL11.glReadPixels(0, 0, bounds.width, bounds.height, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buffer);
    byte[] bytes = new byte[size];
    buffer.get(bytes);/*from w  w  w  . ja va2s  . c  o  m*/
    /* 
     * In OpenGL (0,0) is at the bottom-left corner, and y values ascend in the upward
     * direction.  This is opposite to SWT which defines (0,0) to be at the top-left
     * corner with y values ascendingin the downwards direction.  Re-order the OpenGL-
     * provided bytes to SWT's expected order so that the Image will not appear inverted.  
     */
    byte[] temp = new byte[bytes.length];
    for (int i = 0; i < bytes.length; i += bounds.width * PAD) {
        System.arraycopy(bytes, bytes.length - i - bounds.width * PAD, temp, i, bounds.width * PAD);
    }
    bytes = temp;
    ImageData data = new ImageData(bounds.width, bounds.height, 32,
            new PaletteData(0xFF000000, 0xFF0000, 0xFF00), PAD, bytes);
    final Image image = new Image(display, data);

    Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());
    Canvas canvas = new Canvas(shell, SWT.NONE);
    canvas.setLayoutData(new GridData(bounds.width, bounds.height));
    canvas.addListener(SWT.Paint, new Listener() {
        @Override
        public void handleEvent(Event event) {
            event.gc.drawImage(image, 0, 0);
        }
    });
    shell.pack();
    shell.open();
    shell.addListener(SWT.Dispose, new Listener() {
        @Override
        public void handleEvent(Event event) {
            image.dispose();
        }
    });
}

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From source file:org.fenggui.binding.render.lwjgl.LWJGLOpenGL.java

License:Open Source License

public void readPixels(int x, int y, int width, int height, ByteBuffer bgr) {
    GL11.glReadPixels(x, y, width, height, GL12.GL_BGR, GL11.GL_UNSIGNED_BYTE, bgr);
}

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From source file:org.free.jake2.render.lwjgl.Misc.java

License:Open Source License

void GL_ScreenShot_f() {
    StringBuilder sb = new StringBuilder(FileSystem.Gamedir() + "/scrshot/jake00.tga");
    FileSystem.CreatePath(sb.toString());
    File file = new File(sb.toString());
    // find a valid file name
    int i = 0;/*  www . j  a v  a  2  s. co  m*/
    int offset = sb.length() - 6;
    while (file.exists() && i++ < 100) {
        sb.setCharAt(offset, (char) ((i / 10) + '0'));
        sb.setCharAt(offset + 1, (char) ((i % 10) + '0'));
        file = new File(sb.toString());
    }
    if (i == 100) {
        VID.Printf(Defines.PRINT_ALL, "Clean up your screenshots\n");
        return;
    }

    try {
        RandomAccessFile out = new RandomAccessFile(file, "rw");
        FileChannel ch = out.getChannel();
        int fileLength = TGA_HEADER_SIZE + vid.width * vid.height * 3;
        out.setLength(fileLength);
        MappedByteBuffer image = ch.map(FileChannel.MapMode.READ_WRITE, 0, fileLength);

        // write the TGA header
        image.put(0, (byte) 0).put(1, (byte) 0);
        image.put(2, (byte) 2); // uncompressed type
        image.put(12, (byte) (vid.width & 0xFF)); // vid.width
        image.put(13, (byte) (vid.width >> 8)); // vid.width
        image.put(14, (byte) (vid.height & 0xFF)); // vid.height
        image.put(15, (byte) (vid.height >> 8)); // vid.height
        image.put(16, (byte) 24); // pixel size

        // go to image data position
        image.position(TGA_HEADER_SIZE);

        // change pixel alignment for reading
        if (vid.width % 4 != 0) {
            GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1);
        }

        // OpenGL 1.2+ supports the GL_BGR color format
        // check the GL_VERSION to use the TARGA BGR order if possible
        // e.g.: 1.5.2 NVIDIA 66.29
        if (gl_config.getOpenGLVersion() >= 1.2f) {
            // read the BGR values into the image buffer
            GL11.glReadPixels(0, 0, vid.width, vid.height, GL12.GL_BGR, GL11.GL_UNSIGNED_BYTE, image);
        } else {
            // read the RGB values into the image buffer
            GL11.glReadPixels(0, 0, vid.width, vid.height, GL11.GL_RGB, GL11.GL_UNSIGNED_BYTE, image);
            // flip RGB to BGR
            byte tmp;
            for (i = TGA_HEADER_SIZE; i < fileLength; i += 3) {
                tmp = image.get(i);
                image.put(i, image.get(i + 2));
                image.put(i + 2, tmp);
            }
        }
        // reset to default alignment
        GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 4);
        // close the file channel
        ch.close();
    } catch (IOException e) {
        VID.Printf(Defines.PRINT_ALL, e.getMessage() + '\n');
    }

    VID.Printf(Defines.PRINT_ALL, "Wrote " + file + '\n');
}

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From source file:org.jge.util.LWJGLHandler.java

License:Open Source License

public static BufferedImage takeScreenshot() {
    int k = Display.getWidth() * Display.getHeight();
    if (screenshotBuffer == null || screenshotBuffer.capacity() < k) {
        screenshotBuffer = BufferUtils.createIntBuffer(k);
        screenshotBufferArray = new int[k];
    }/*from   www .  ja  v  a 2s  .c om*/
    GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1);
    GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1);
    screenshotBuffer.clear();
    GL11.glReadPixels(0, 0, Display.getWidth(), Display.getHeight(), GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE,
            screenshotBuffer);
    screenshotBuffer.get(screenshotBufferArray);
    int[] aint1 = new int[Display.getWidth()];
    int j = Display.getHeight() / 2;
    for (int l = 0; l < j; ++l) {
        System.arraycopy(screenshotBufferArray, l * Display.getWidth(), aint1, 0, Display.getWidth());
        System.arraycopy(screenshotBufferArray, (Display.getHeight() - 1 - l) * Display.getWidth(),
                screenshotBufferArray, l * Display.getWidth(), Display.getWidth());
        System.arraycopy(aint1, 0, screenshotBufferArray, (Display.getHeight() - 1 - l) * Display.getWidth(),
                Display.getWidth());
    }
    BufferedImage bufferedimage = new BufferedImage(Display.getWidth(), Display.getHeight(),
            BufferedImage.TYPE_INT_RGB);
    for (int i = 0; i < screenshotBufferArray.length; i++) {
        Color c = ImageUtils.getColor(screenshotBufferArray[i]);
        screenshotBufferArray[i] = new Color(c.getBlue(), c.getGreen(), c.getRed()).getRGB();
    }
    bufferedimage.setRGB(0, 0, Display.getWidth(), Display.getHeight(), screenshotBufferArray, 0,
            Display.getWidth());
    return bufferedimage;
}

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From source file:org.oscim.gdx.LwjglGL20.java

License:Apache License

public void readPixels(int x, int y, int width, int height, int format, int type, Buffer pixels) {
    if (pixels instanceof ByteBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (ByteBuffer) pixels);
    else if (pixels instanceof ShortBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (ShortBuffer) pixels);
    else if (pixels instanceof IntBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (IntBuffer) pixels);
    else if (pixels instanceof FloatBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (FloatBuffer) pixels);
    else//from   ww  w . j a va  2  s.c om
        throw new GdxRuntimeException("Can't use " + pixels.getClass().getName()
                + " with this method. Use ByteBuffer, ShortBuffer, IntBuffer or FloatBuffer instead. Blame LWJGL");
}

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