Example usage for android.graphics Matrix Matrix

Introduction

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

Prototype

public Matrix()

Source Link

Document

Create an identity matrix

Usage

From source file:Main.java

/**
 * scale image/*from   www. java 2s. co  m*/
 * @param src
 * @param scaleWidth
 * @param scaleHeight
 * @return
 */
public static Bitmap scaleImage(Bitmap src, float scaleWidth, float scaleHeight) {
    if (src == null) {
        return null;
    }
    Matrix matrix = new Matrix();
    matrix.postScale(scaleWidth, scaleHeight);
    return Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
}

From source file:Main.java

public static Bitmap getFlippedBitmap(Resources res, int resId) {

    BitmapFactory.Options opt = new BitmapFactory.Options();
    opt.inJustDecodeBounds = true;//from  ww w  . jav  a 2s  .c  om
    //Below line is necessary to fill in opt.outWidth, opt.outHeight
    Bitmap b = BitmapFactory.decodeResource(res, resId, opt);

    b = Bitmap.createBitmap(opt.outWidth, opt.outHeight, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(b);

    Matrix flipHorizontalMatrix = new Matrix();
    flipHorizontalMatrix.setScale(-1, 1);
    flipHorizontalMatrix.postTranslate(b.getWidth(), 0);

    Bitmap bb = BitmapFactory.decodeResource(res, resId);
    canvas.drawBitmap(bb, flipHorizontalMatrix, null);

    return b;
}

From source file:Main.java

public static void drawBitmapCenter(Canvas canvas, float f, float f1, float f2, boolean flag, boolean flag1,
        Bitmap bitmap, Paint paint) {
    if (flag) {/* w w w  . j  a  v a 2  s  .  co m*/
        f -= (f2 * (float) bitmap.getWidth()) / 2.0F;
    }
    if (flag1) {
        f1 -= (f2 * (float) bitmap.getHeight()) / 2.0F;
    }
    Matrix matrix = new Matrix();
    matrix.setScale(f2, f2);
    matrix.postTranslate(f, f1);
    canvas.drawBitmap(bitmap, matrix, paint);
}

From source file:Main.java

public static Drawable zoomDrawable(Drawable drawable, int w, int h) {
    if (null == drawable || w < 0 || h < 0) {
        return null;
    }/*from w w  w .ja va 2  s  . com*/

    try {
        int width = drawable.getIntrinsicWidth();
        int height = drawable.getIntrinsicHeight();
        Bitmap oldbmp = drawableToBitmap(drawable);
        Matrix matrix = new Matrix();
        float scaleWidth = 1;
        float scaleHeight = 1;
        if (w > 0) {
            scaleWidth = ((float) w / width);
        }
        if (h > 0) {
            scaleHeight = ((float) h / height);
        }

        matrix.postScale(scaleWidth, scaleHeight);
        Bitmap newbmp = Bitmap.createBitmap(oldbmp, 0, 0, width, height, matrix, true);
        return new BitmapDrawable(newbmp);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static Bitmap compressBitmap(Bitmap bitmap, int width, int height, boolean isAdjust) {
    if (bitmap.getWidth() > width || bitmap.getHeight() > height) {
        float scaleX = new BigDecimal(width).divide(new BigDecimal(bitmap.getWidth()), 4, BigDecimal.ROUND_DOWN)
                .floatValue();/*  w ww  .ja  v a 2 s. c  om*/
        float scaleY = new BigDecimal(height)
                .divide(new BigDecimal(bitmap.getHeight()), 4, BigDecimal.ROUND_DOWN).floatValue();
        if (isAdjust) {
            scaleX = (scaleX < scaleY ? scaleX : scaleY);
            scaleY = scaleX;
        }
        Matrix matrix = new Matrix();
        matrix.postScale(scaleX, scaleY);
        bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
    }
    return bitmap;
}

From source file:Main.java

public static Bitmap rotate(Bitmap bitmap, int angle) {
    Matrix matrix = new Matrix();
    matrix.postRotate(angle);//from  w w w  . jav  a2 s.c om
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}

From source file:Main.java

public static Bitmap reverseByVertical(Bitmap bitmap) {
    Matrix matrix = new Matrix();
    matrix.preScale(1, -1);/* w  w  w  .  ja  v  a  2 s .c o m*/
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, false);
}

From source file:Main.java

public static Bitmap reverseByHorizontal(Bitmap bitmap) {
    Matrix matrix = new Matrix();
    matrix.preScale(-1, 1);//w  w w  . java  2s . c  o m
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, false);
}

From source file:Main.java

public static Bitmap zoom(Bitmap bitmap, float sf) {
    Matrix matrix = new Matrix();
    matrix.postScale(sf, sf);/*from   w  w w .  j  ava2  s  . co  m*/
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}

From source file:Main.java

/**
 * Scale a bitmap and correct the dimensions
 *
 * @param bitmap      Bitmap to scale/*w ww .  ja va 2 s .com*/
 * @param width       width for scaling
 * @param height      height for scaling
 * @param orientation Current orientation of the Image
 * @return Scaled bitmap
 */
public static Bitmap getScaledBitmap(Bitmap bitmap, int width, int height, int orientation) {
    Matrix m = new Matrix();
    m.setRectToRect(new RectF(0, 0, bitmap.getWidth(), bitmap.getHeight()), new RectF(0, 0, width, height),
            Matrix.ScaleToFit.CENTER);
    if (orientation == ExifInterface.ORIENTATION_ROTATE_90) {
        m.postRotate(ORIENTATION_90);
    } else if (orientation == ExifInterface.ORIENTATION_ROTATE_180) {
        m.postRotate(ORIENTATION_180);
    } else if (orientation == ExifInterface.ORIENTATION_ROTATE_270) {
        m.postRotate(ORIENTATION_270);
    }
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), m, true);
}