// 保存GL绘制的图形
public static Bitmap saveGLBitmap(int width_surface, int height_surface)
{
// isSave = false;
int w = width_surface;
int h = height_surface;

Log.i("hari", "w:" + w + "-----h:" + h);

int b[] = new int[(int) (w * h)];
int bt[] = new int[(int) (w * h)];
IntBuffer buffer = IntBuffer.wrap(b);
buffer.position(0);
GLES20.glReadPixels(0, 0, w, h, GLES20.GL_RGBA,
GLES20.GL_UNSIGNED_BYTE, buffer);
for (int i = 0; i < h; i++) {
/**
* 由于OpenGL与Android的Bitmap不兼容，这里需要进行一些校正
*/
for (int j = 0; j < w; j++) {
int pix = b[i * w + j];
int pb = (pix >> 16) & 0xff;
int pr = (pix << 16) & 0x00ff0000;
int pix1 = (pix & 0xff00ff00) | pr | pb;
bt[(h - i - 1) * w + j] = pix1;
}
}
Bitmap inBitmap = null;
if (inBitmap == null || !inBitmap.isMutable()
|| inBitmap.getWidth() != w
|| inBitmap.getHeight() != h) {
inBitmap = Bitmap.createBitmap(w, h,
Bitmap.Config.ARGB_8888);
}
// Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
inBitmap.copyPixelsFromBuffer(buffer);
// return inBitmap ;
// return Bitmap.createBitmap(bt, w, h,
// Bitmap.Config.ARGB_8888);
inBitmap = Bitmap.createBitmap(bt, w, h,
Bitmap.Config.ARGB_8888);

ByteArrayOutputStream bos = new ByteArrayOutputStream();
inBitmap.compress(CompressFormat.PNG, 90, bos);
byte[] bitmapdata = bos.toByteArray();
ByteArrayInputStream fis = new ByteArrayInputStream(bitmapdata);

// final Calendar c=Calendar.getInstance();
// long mytimestamp=c.getTimeInMillis();
// String timeStamp=String.valueOf(mytimestamp);
// String myfile="hari"+timeStamp+".jpeg";

File dir_image = new File(Environment.getExternalStorageDirectory()
+ File.separator + "printerscreenshots");
dir_image.mkdirs();

try {
File tmpFile = new File(dir_image + "/"
+ System.currentTimeMillis() + ".png");
FileOutputStream fos = new FileOutputStream(tmpFile);

byte[] buf = new byte[1024];
int len;
while ((len = fis.read(buf)) > 0) {
fos.write(buf, 0, len);
}
fis.close();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return inBitmap;
}

public static Bitmap combineBitmap(Bitmap background, Bitmap foreground) {

if (background == null) {
return null;
}

int bgWidth = background.getWidth();

int bgHeight = background.getHeight();

int fgWidth = foreground.getWidth();

int fgHeight = foreground.getHeight();

Bitmap newmap = Bitmap

.createBitmap(bgWidth, bgHeight, Config.ARGB_8888);

Canvas canvas = new Canvas(newmap);

canvas.drawBitmap(background, 0, 0, null);

canvas.drawBitmap(foreground, (bgWidth - fgWidth) / 2,

(bgHeight - fgHeight) / 2, null);

canvas.save(Canvas.ALL_SAVE_FLAG);

canvas.restore();

return newmap;

}