Examples with ByteBuffer java.nio.ByteBuffer used on opensource projects

Example 41 with ByteBuffer

use of java.nio.ByteBuffer in project titan by thinkaurelius.

the class HBaseStoreManager method getStartKey.

/**
     * This method generates the second argument to
     * {@link HBaseAdmin#createTable(HTableDescriptor, byte[], byte[], int)}.
     * <p/>
     * From the {@code createTable} javadoc:
     * "The start key specified will become the end key of the first region of
     * the table, and the end key specified will become the start key of the
     * last region of the table (the first region has a null start key and
     * the last region has a null end key)"
     * <p/>
     * To summarize, the {@code createTable} argument called "startKey" is
     * actually the end key of the first region.
     */
private byte[] getStartKey(int regionCount) {
    ByteBuffer regionWidth = ByteBuffer.allocate(4);
    regionWidth.putInt((int) (((1L << 32) - 1L) / regionCount)).flip();
    return StaticArrayBuffer.of(regionWidth).getBytes(0, 4);
}

Example 42 with ByteBuffer

use of java.nio.ByteBuffer in project playn by threerings.

the class AndroidSurfaceGL method onSurfaceCreated.

@Override
public void onSurfaceCreated() {
    createTexture();
    if (cachedPixels != null) {
        try {
            AndroidGLContext actx = (AndroidGLContext) ctx;
            ByteBuffer pixelBuffer = ByteBuffer.allocate(texWidth * texHeight * 4);
            FileInputStream in = new FileInputStream(cachedPixels);
            in.read(pixelBuffer.array());
            in.close();
            int bufferTex = actx.createTexture(false, false, false);
            actx.gl.glTexImage2D(GL20.GL_TEXTURE_2D, 0, GL20.GL_RGBA, texWidth, texHeight, 0, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE, pixelBuffer);
            // bind our surface framebuffer and render the saved texture data into it
            bindFramebuffer();
            ctx.quadShader(null).prepareTexture(bufferTex, Tint.NOOP_TINT).addQuad(StockInternalTransform.IDENTITY, 0, texHeight, texWidth, 0, 0, 0, 1, 1);
            // rebind the default frame buffer (which will flush the rendering operation)
            ctx.bindFramebuffer();
            ctx.destroyTexture(bufferTex);
            pixelBuffer = null;
            cachedPixels.delete();
            cachedPixels = null;
        } catch (IOException e) {
            PlayN.reportError("Error reading cached surface pixels from file.", e);
        }
    }
}

Example 43 with ByteBuffer

use of java.nio.ByteBuffer in project playn by threerings.

the class AndroidSurfaceGL method onSurfaceLost.

@Override
public void onSurfaceLost() {
    try {
        AndroidGLContext actx = (AndroidGLContext) ctx;
        bindFramebuffer();
        ByteBuffer pixelBuffer = ByteBuffer.allocate(texWidth * texHeight * 4);
        actx.gl.glReadPixels(0, 0, texWidth, texHeight, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE, pixelBuffer);
        actx.checkGLError("glReadPixels");
        try {
            cachedPixels = new File(cacheDir, "surface-" + Integer.toHexString(hashCode()));
            FileOutputStream out = new FileOutputStream(cachedPixels);
            out.write(pixelBuffer.array());
            out.close();
        } catch (IOException e) {
            PlayN.reportError("IOException writing cached Surface to file.", e);
            cachedPixels = null;
        }
        pixelBuffer = null;
    } catch (OutOfMemoryError e) {
        PlayN.reportError("OutOfMemoryError reading cached Surface to buffer.", e);
        cachedPixels = null;
    }
    clearTexture();
}

Example 44 with ByteBuffer

use of java.nio.ByteBuffer in project watson by totemo.

the class Screenshot method save.

// --------------------------------------------------------------------------
/**
   * Save a screenshot.
   * 
   * @param file the file to write.
   * @param width the screen width.
   * @param height the screen height.
   */
public static IChatComponent save(File file, int width, int height) {
    try {
        file.getParentFile().mkdirs();
        ByteBuffer buffer = BufferUtils.createByteBuffer(width * height * 4);
        GL11.glReadBuffer(GL11.GL_FRONT);
        // GL11.glReadBuffer() unexpectedly sets an error state (invalid enum).
        GL11.glGetError();
        GL11.glReadPixels(0, 0, width, height, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buffer);
        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) * 4;
                int r = buffer.get(i) & 0xFF;
                int g = buffer.get(i + 1) & 0xFF;
                int b = buffer.get(i + 2) & 0xFF;
                image.setRGB(x, (height - 1) - y, (0xFF << 24) | (r << 16) | (g << 8) | b);
            }
        }
        ImageIO.write(image, "png", file);
        ChatComponentText text = new ChatComponentText(file.getName());
        text.getChatStyle().setChatClickEvent(new ClickEvent(ClickEvent.Action.OPEN_FILE, file.getAbsolutePath()));
        text.getChatStyle().setUnderlined(Boolean.valueOf(true));
        return new ChatComponentTranslation("screenshot.success", new Object[] { text });
    } catch (Exception ex) {
        return new ChatComponentTranslation("screenshot.failure", new Object[] { ex.getMessage() });
    }
}

Example 45 with ByteBuffer

use of java.nio.ByteBuffer in project titan by thinkaurelius.

the class WriteByteBuffer method require.

private void require(int size) {
    if (buffer.capacity() - buffer.position() < size) {
        //Need to resize
        //extra capacity as buffer
        int newcapacity = buffer.position() + size + buffer.capacity();
        Preconditions.checkArgument(newcapacity <= MAX_BUFFER_CAPACITY, "Capacity exceeds max buffer capacity: %s", MAX_BUFFER_CAPACITY);
        ByteBuffer newBuffer = ByteBuffer.allocate(newcapacity);
        buffer.flip();
        newBuffer.put(buffer);
        buffer = newBuffer;
    }
}