Gob*_*ffi 32 graphics camera android surfaceview
我有一个SurfaceView用于绘制图像的,我想将它们叠加到手机相机的实时信息中.
目前,SurfaceView包含图像的图像具有白色背景,但如果我将它们叠加到手机的相机源上,则它们必须是透明的.相机和动画绘图不能在同一个上完成SurfaceView.
追求使用涉及管理相机和绘制图像的多个视图的最佳方法是什么？是否可以SurfaceView透明化？
bal*_*ddy 20
好吧,这就是我做到的...我希望有人发现它很有用虽然Qualcomm AR的东西已经出来了......它可能很有用..哦,基本上它的作用是 - 从Android示例生成两个时髦的立方体,附加功能介绍了触摸事件,虽然旋转矢量很多 - 只是为了演示目的,当然,立方体叠加在相机预览的顶部,可以在屏幕上移动.
public class TakeRecieptPicture extends Activity implements Callback {
private Camera camera;
private SurfaceView mSurfaceView;
SurfaceHolder mSurfaceHolder;
private TouchSurfaceView mGLSurfaceView;
ShutterCallback shutter = new ShutterCallback(){
@Override
public void onShutter() {
// TODO Auto-generated method stub
// No action to be perfomed on the Shutter callback.
}
};
PictureCallback raw = new PictureCallback(){
@Override
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Auto-generated method stub
// No action taken on the raw data. Only action taken on jpeg data.
}
};
PictureCallback jpeg = new PictureCallback(){
@Override
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Auto-generated method stub
FileOutputStream outStream = null;
try{
outStream = new FileOutputStream("/sdcard/test.jpg");
outStream.write(data);
outStream.close();
}catch(FileNotFoundException e){
Log.d("Camera", e.getMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
Log.d("Camera", e.getMessage());
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
mGLSurfaceView = new TouchSurfaceView(this);
addContentView(mGLSurfaceView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
mSurfaceView = new SurfaceView(this);
addContentView(mSurfaceView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceHolder.setFormat(PixelFormat.TRANSLUCENT|LayoutParams.FLAG_BLUR_BEHIND);
}
private void takePicture() {
// TODO Auto-generated method stub
camera.takePicture(shutter, raw, jpeg);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
Camera.Parameters p = camera.getParameters();
p.setPreviewSize(arg2, arg3);
try {
camera.setPreviewDisplay(arg0);
} catch (IOException e) {
e.printStackTrace();
}
camera.startPreview();
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera = Camera.open();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera.stopPreview();
camera.release();
}
}
TouchSurfaceView定义如下:
class TouchSurfaceView extends GLSurfaceView {
public TouchSurfaceView(Context context) {
super(context);
cr = new CubeRenderer(true);
this.setEGLConfigChooser(8, 8, 8, 8, 16, 0);
this.setRenderer(cr);
this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
this.getHolder().setFormat(PixelFormat.TRANSPARENT);
}
public boolean onTrackballEvent(MotionEvent e) {
cr.mAngleX += e.getX() * TRACKBALL_SCALE_FACTOR;
cr.mAngleY += e.getY() * TRACKBALL_SCALE_FACTOR;
requestRender();
return true; }
@Override
public boolean onTouchEvent(MotionEvent e) {
float x = e.getX();
float y = e.getY();
switch (e.getAction()) {
case MotionEvent.ACTION_MOVE:
float dx = x - mPreviousX;
float dy = y - mPreviousY;
cr.mAngleX += dx * TOUCH_SCALE_FACTOR;
cr.mAngleY += dy * TOUCH_SCALE_FACTOR;
requestRender();
}
mPreviousX = x;
mPreviousY = y;
return true;
}
private final float TOUCH_SCALE_FACTOR = 180.0f / 320;
private final float TRACKBALL_SCALE_FACTOR = 36.0f;
public CubeRenderer cr ;
private float mPreviousX;
private float mPreviousY;
}
CubeRenderer由下式给出:
class CubeRenderer implements GLSurfaceView.Renderer {
public CubeRenderer(boolean useTranslucentBackground) {
mTranslucentBackground = useTranslucentBackground;
mCube = new Cube();
}
public void onDrawFrame(GL10 gl) {
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef(0, 0, -5.0f);
gl.glRotatef(mAngle, 0, 1, 0);
gl.glRotatef(mAngle*0.25f, 1, 0, 0);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
mCube.draw(gl);
gl.glRotatef(mAngle*2.0f, 0, 1, 1);
gl.glTranslatef(0.5f, 0.5f, 0.5f);
mCube.draw(gl);
mAngle += 1.2f;
}
public void onSurfaceChanged(GL10 gl, int width, int height) {
gl.glViewport(0, 0, width, height);
float ratio = (float) width / height;
gl.glMatrixMode(GL10.GL_PROJECTION);
gl.glLoadIdentity();
gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
}
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
gl.glDisable(GL10.GL_DITHER);
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST);
if (mTranslucentBackground) {
gl.glClearColor(0,0,0,0);
} else {
gl.glClearColor(1,1,1,1);
}
gl.glEnable(GL10.GL_CULL_FACE);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glEnable(GL10.GL_DEPTH_TEST);
}
public void setAngle(float _angle){
}
private boolean mTranslucentBackground;
private Cube mCube;
private float mAngle;
public float mAngleX;
public float mAngleY;
}
最后Cube本身由下式给出:
class Cube{
public Cube()
{ int one = 0x10000;
int vertices[] = {
-one, -one, -one,
one, -one, -one,
one, one, -one,
-one, one, -one,
-one, -one, one,
one, -one, one,
one, one, one,
-one, one, one, };
float[] colors = {
0f, 0f, 0f, 0.5f,
1f , 0f, 0f, 0.1f,
1f,1f,0f,0.5f,
0f, 1f, 0f, 0.1f,
0f, 0f, 1f, 0.1f,
1f, 0f, 1f, 0.2f,
1f, 1f, 1f, 0.1f,
0f, 1f, 1f, 0.1f, };
byte indices[] = {
0, 4, 5, 0, 5, 1,
1, 5, 6, 1, 6, 2,
2, 6, 7, 2, 7, 3,
3, 7, 4, 3, 4, 0,
4, 7, 6, 4, 6, 5,
3, 0, 1, 3, 1, 2 };
ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4);
vbb.order(ByteOrder.nativeOrder());
mVertexBuffer = vbb.asIntBuffer();
mVertexBuffer.put(vertices);
mVertexBuffer.position(0);
ByteBuffer cbb = ByteBuffer.allocateDirect(colors.length*4);
cbb.order(ByteOrder.nativeOrder());
mColorBuffer = cbb.asFloatBuffer();
mColorBuffer.put(colors);
mColorBuffer.position(0);
mIndexBuffer = ByteBuffer.allocateDirect(indices.length);
mIndexBuffer.put(indices);
mIndexBuffer.position(0); }
public void draw(GL10 gl) {
gl.glFrontFace(gl.GL_CW);
gl.glVertexPointer(3, gl.GL_FIXED, 0, mVertexBuffer);
gl.glColorPointer(4, gl.GL_FIXED, 0, mColorBuffer);
gl.glDrawElements(gl.GL_TRIANGLES, 36, gl.GL_UNSIGNED_BYTE, mIndexBuffer); }
private IntBuffer mVertexBuffer;
private FloatBuffer mColorBuffer;
private ByteBuffer mIndexBuffer;
}
希望有人觉得这很有用......
小智 6
我通过以下方法取得了成功.
首先制作一个看起来像这样的布局xml文件(注意两个视图的顺序):
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical">
<com.yourcustom.OverlayView
android:id="@+id/overlay" android:layout_width="fill_parent"
android:layout_height="fill_parent">
</com.yourcustom.OverlayView>
<SurfaceView android:id="@+id/surface"
android:layout_width="fill_parent" android:layout_height="fill_parent">
</SurfaceView>
</FrameLayout>
OverlayView是SurfaceView绘图和动画线程实现的子类.另一个SurfaceView将是处理Camera预览的表面.onCreate你应该在里面设置你的观点:
mView = (OverlayView)this.findViewById(R.id.overlay);
mView.getHolder().setFormat(PixelFormat.TRANSLUCENT);
mSurfaceView = (SurfaceView)this.findViewById(R.id.surface);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
您应该添加SurfaceHolder.Callback实施到SurfaceHolder的mView用于处理动画线程.在子类中实现它并使用动画/绘图线程的示例可以在旧的LunarLander示例中找到:http:
//developer.android.com/resources/samples/LunarLander/src/com/example/android/lunarlander/ LunarView.html
除此之外,您以与此示例相同的方式设置相机SurfaceView:http: //developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/graphics/CameraPreview.html
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