Example usage for android.graphics Matrix mapPoints

Introduction

In this page you can find the example usage for android.graphics Matrix mapPoints.

Prototype

public void mapPoints(float[] pts) 

Source Link

Document

Apply this matrix to the array of 2D points, and write the transformed points back into the array

Usage

From source file:com.example.linhdq.test.documents.creation.crop.CropImageActivity.java

@OnClick(R.id.item_save)
void onSaveClicked() {
    if (!mCropData.isPresent() || mSaving || (mCrop == null)) {
        return;//from   w w  w  .j av  a  2 s. c  o m
    }
    mSaving = true;

    Util.startBackgroundJob(this, null, getText(R.string.cropping_image).toString(), new Runnable() {
        public void run() {
            try {
                float scale = 1f / mCropData.get().getScaleResult().getScaleFactor();
                Matrix scaleMatrix = new Matrix();
                scaleMatrix.setScale(scale, scale);

                final float[] trapezoid = mCrop.getTrapezoid();
                final RectF perspectiveCorrectedBoundingRect = new RectF(
                        mCrop.getPerspectiveCorrectedBoundingRect());
                scaleMatrix.mapRect(perspectiveCorrectedBoundingRect);
                Box bb = new Box((int) perspectiveCorrectedBoundingRect.left,
                        (int) perspectiveCorrectedBoundingRect.top,
                        (int) perspectiveCorrectedBoundingRect.width(),
                        (int) perspectiveCorrectedBoundingRect.height());

                Pix pix8 = Convert.convertTo8(mPix);
                mPix.recycle();

                Pix croppedPix = Clip.clipRectangle2(pix8, bb);
                if (croppedPix == null) {
                    throw new IllegalStateException();
                }
                pix8.recycle();

                scaleMatrix.postTranslate(-bb.getX(), -bb.getY());
                scaleMatrix.mapPoints(trapezoid);

                final float[] dest = new float[] { 0, 0, bb.getWidth(), 0, bb.getWidth(), bb.getHeight(), 0,
                        bb.getHeight() };
                Pix bilinear = Projective.projectiveTransform(croppedPix, dest, trapezoid);
                if (bilinear == null) {
                    bilinear = croppedPix;
                } else {
                    croppedPix.recycle();
                }

                if (mRotation != 0 && mRotation != 4) {
                    Pix rotatedPix = Rotate.rotateOrth(bilinear, mRotation);
                    bilinear.recycle();
                    bilinear = rotatedPix;
                }
                if (bilinear == null) {
                    throw new IllegalStateException();
                }
                Intent result = new Intent();
                OCR.savePixToCacheDir(CropImageActivity.this, bilinear.copy());
                result.putExtra(DocumentGridActivity.EXTRA_NATIVE_PIX, bilinear.getNativePix());
                setResult(RESULT_OK, result);
            } catch (IllegalStateException e) {
                setResult(RESULT_CANCELED);
            } finally {
                finish();
            }
        }
    }, mHandler);

}

---

From source file:com.android.launcher2.Workspace.java

void mapPointFromSelfToChild(View v, float[] xy, Matrix cachedInverseMatrix) {
    if (cachedInverseMatrix == null) {
        v.getMatrix().invert(mTempInverseMatrix);
        cachedInverseMatrix = mTempInverseMatrix;
    }/* www .ja v a2 s .  c o m*/
    int scrollX = getScrollX();
    if (mNextPage != INVALID_PAGE) {
        scrollX = mScroller.getFinalX();
    }
    xy[0] = xy[0] + scrollX - v.getLeft();
    xy[1] = xy[1] + getScrollY() - v.getTop();
    cachedInverseMatrix.mapPoints(xy);
}

---

• «
• 1
• 2
• »