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Stetch support for Android View classes added (Feature #2840)

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This commit is contained in:
Alexander Smorkalov 2013-03-11 11:17:19 +04:00
parent 13f402a554
commit 8942eaf0d7
4 changed files with 32 additions and 3 deletions
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19
modules/java/generator/src/java/android+CameraBridgeViewBase.java
View File

@ -15,6 +15,7 @@ import android.content.DialogInterface;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
@ -44,6 +45,7 @@ public abstract class CameraBridgeViewBase extends SurfaceView implements Surfac
protected int mFrameHeight;
protected int mMaxHeight;
protected int mMaxWidth;
protected float mScale = 0;
protected int mPreviewFormat = Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA;
protected int mCameraIndex = -1;
protected boolean mEnabled;
@ -389,7 +391,22 @@ public abstract class CameraBridgeViewBase extends SurfaceView implements Surfac
Canvas canvas = getHolder().lockCanvas();
if (canvas != null) {
canvas.drawColor(0, android.graphics.PorterDuff.Mode.CLEAR);
canvas.drawBitmap(mCacheBitmap, (canvas.getWidth() - mCacheBitmap.getWidth()) / 2, (canvas.getHeight() - mCacheBitmap.getHeight()) / 2, null);
Log.d(TAG, "mStretch value: " + mScale);
if (mScale != 0) {
canvas.drawBitmap(mCacheBitmap, new Rect(0,0,mCacheBitmap.getWidth(), mCacheBitmap.getHeight()),
new Rect((int)((canvas.getWidth() - mScale*mCacheBitmap.getWidth()) / 2),
(int)((canvas.getHeight() - mScale*mCacheBitmap.getHeight()) / 2),
(int)((canvas.getWidth() - mScale*mCacheBitmap.getWidth()) / 2 + mScale*mCacheBitmap.getWidth()),
(int)((canvas.getHeight() - mScale*mCacheBitmap.getHeight()) / 2 + mScale*mCacheBitmap.getHeight())), null);
} else {
canvas.drawBitmap(mCacheBitmap, new Rect(0,0,mCacheBitmap.getWidth(), mCacheBitmap.getHeight()),
new Rect((canvas.getWidth() - mCacheBitmap.getWidth()) / 2,
(canvas.getHeight() - mCacheBitmap.getHeight()) / 2,
(canvas.getWidth() - mCacheBitmap.getWidth()) / 2 + mCacheBitmap.getWidth(),
(canvas.getHeight() - mCacheBitmap.getHeight()) / 2 + mCacheBitmap.getHeight()), null);
}
if (mFpsMeter != null) {
mFpsMeter.measure();
mFpsMeter.draw(canvas, 20, 30);

6
modules/java/generator/src/java/android+JavaCameraView.java
View File

@ -10,6 +10,7 @@ import android.hardware.Camera.PreviewCallback;
import android.os.Build;
import android.util.AttributeSet;
import android.util.Log;
import android.view.ViewGroup.LayoutParams;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
@ -130,6 +131,11 @@ public class JavaCameraView extends CameraBridgeViewBase implements PreviewCallb
mFrameWidth = params.getPreviewSize().width;
mFrameHeight = params.getPreviewSize().height;
if ((getLayoutParams().width == LayoutParams.MATCH_PARENT) && (getLayoutParams().height == LayoutParams.MATCH_PARENT))
mScale = Math.min(((float)height)/mFrameHeight, ((float)width)/mFrameWidth);
else
mScale = 0;
if (mFpsMeter != null) {
mFpsMeter.setResolution(mFrameWidth, mFrameHeight);
}

6
modules/java/generator/src/java/android+NativeCameraView.java
View File

@ -8,6 +8,7 @@ import org.opencv.highgui.VideoCapture;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.ViewGroup.LayoutParams;
/**
* This class is an implementation of a bridge between SurfaceView and native OpenCV camera.
@ -102,6 +103,11 @@ public class NativeCameraView extends CameraBridgeViewBase {
mFrameWidth = (int)frameSize.width;
mFrameHeight = (int)frameSize.height;
if ((getLayoutParams().width == LayoutParams.MATCH_PARENT) && (getLayoutParams().height == LayoutParams.MATCH_PARENT))
mScale = Math.min(((float)height)/mFrameHeight, ((float)width)/mFrameWidth);
else
mScale = 0;
if (mFpsMeter != null) {
mFpsMeter.setResolution(mFrameWidth, mFrameHeight);
}

4
samples/android/tutorial-3-cameracontrol/res/layout/tutorial3_surface_view.xml
View File

@ -4,8 +4,8 @@
android:layout_height="match_parent" >
<org.opencv.samples.tutorial3.Tutorial3View
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
android:id="@+id/tutorial3_activity_java_surface_view" />