Example usage for android.graphics Canvas setMatrix

Introduction

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

Prototype

public void setMatrix(@Nullable Matrix matrix) 

Source Link

Document

Completely replace the current matrix with the specified matrix.

Usage

From source file:Main.java

public static Bitmap BITMAP_RESIZER(Bitmap bitmap, int newWidth, int newHeight) {
    Bitmap scaledBitmap = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);

    float ratioX = newWidth / (float) bitmap.getWidth();
    float ratioY = newHeight / (float) bitmap.getHeight();
    float middleX = newWidth / 2.0f;
    float middleY = newHeight / 2.0f;

    Matrix scaleMatrix = new Matrix();
    scaleMatrix.setScale(ratioX, ratioY, middleX, middleY);

    Canvas canvas = new Canvas(scaledBitmap);
    canvas.setMatrix(scaleMatrix);
    canvas.drawBitmap(bitmap, middleX - bitmap.getWidth() / 2, middleY - bitmap.getHeight() / 2,
            new Paint(Paint.FILTER_BITMAP_FLAG));

    return scaledBitmap;

}

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From source file:Main.java

/**
 * Scales the provided bitmap to the height and width provided (using antialiasing).
 * (Alternative method for scaling bitmaps since Bitmap.createScaledBitmap(...) produces low quality bitmaps.)
 *
 * @param bitmap    is the bitmap to scale.
 * @param newWidth  is the desired width of the scaled bitmap.
 * @param newHeight is the desired height of the scaled bitmap.
 * @return the scaled bitmap./*from w w w. j a v a2 s .c o  m*/
 */
public static Bitmap scaleBitmap(Bitmap bitmap, int newWidth, int newHeight) {
    Bitmap scaledBitmap = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);

    float scaleX = newWidth / (float) bitmap.getWidth();
    float scaleY = newHeight / (float) bitmap.getHeight();
    float pivotX = 0;
    float pivotY = 0;

    Matrix scaleMatrix = new Matrix();
    scaleMatrix.setScale(scaleX, scaleY, pivotX, pivotY);

    Canvas canvas = new Canvas(scaledBitmap);
    canvas.setMatrix(scaleMatrix);
    canvas.drawBitmap(bitmap, 0, 0, new Paint(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG));

    return scaledBitmap;
}

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From source file:Main.java

public static Bitmap resizeBitmap(Bitmap bitmap, int newWidth, int newHeight) {
    if (bitmap == null) {
        return null;
    }//from   w  w w .j av a2  s  . c  om
    /**
     * http://stackoverflow.com/questions/4821488/bad-image-quality-after-resizing-scaling-bitmap#7468636
     */
    Bitmap scaledBitmap = Bitmap.createBitmap(newWidth, newHeight, Config.ARGB_8888);

    float ratioX = newWidth / (float) bitmap.getWidth();
    float ratioY = newHeight / (float) bitmap.getHeight();
    float middleX = newWidth / 2.0f;
    float middleY = newHeight / 2.0f;

    Matrix scaleMatrix = new Matrix();
    scaleMatrix.setScale(ratioX, ratioY, middleX, middleY);

    Canvas canvas = new Canvas(scaledBitmap);
    canvas.setMatrix(scaleMatrix);
    canvas.drawBitmap(bitmap, middleX - bitmap.getWidth() / 2, middleY - bitmap.getHeight() / 2,
            new Paint(Paint.FILTER_BITMAP_FLAG));

    return scaledBitmap;
}

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From source file:Main.java

public static Bitmap scaleBitmapForDevice(Bitmap bitmap) {
    if (bitmap == null) {
        return null;
    }//from   ww w  .jav  a2s  . com

    float density = Resources.getSystem().getDisplayMetrics().density;
    int newWidth = (int) (bitmap.getWidth() * density);
    int newHeight = (int) (bitmap.getHeight() * density);
    /*
    Bitmap resizeBitmap = Bitmap.createScaledBitmap(bitmap, width, height, true);
     */
    /**
     * http://stackoverflow.com/questions/4821488/bad-image-quality-after-resizing-scaling-bitmap#7468636
     */
    Bitmap scaledBitmap = Bitmap.createBitmap(newWidth, newHeight, Config.ARGB_8888);

    float ratioX = newWidth / (float) bitmap.getWidth();
    float ratioY = newHeight / (float) bitmap.getHeight();
    float middleX = newWidth / 2.0f;
    float middleY = newHeight / 2.0f;

    Matrix scaleMatrix = new Matrix();
    scaleMatrix.setScale(ratioX, ratioY, middleX, middleY);

    Canvas canvas = new Canvas(scaledBitmap);
    canvas.setMatrix(scaleMatrix);
    canvas.drawBitmap(bitmap, middleX - bitmap.getWidth() / 2, middleY - bitmap.getHeight() / 2,
            new Paint(Paint.FILTER_BITMAP_FLAG));
    bitmap.recycle();

    return scaledBitmap;
}

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From source file:Main.java

public static Bitmap createCircularClip(Bitmap input, int width, int height) {
    if (input == null)
        return null;

    final int inWidth = input.getWidth();
    final int inHeight = input.getHeight();
    final Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    final Canvas canvas = new Canvas(output);
    final Paint paint = new Paint();
    paint.setShader(new BitmapShader(input, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
    paint.setAntiAlias(true);/*from  w  ww.  j  a  v a  2s  .c o  m*/
    final RectF srcRect = new RectF(0, 0, inWidth, inHeight);
    final RectF dstRect = new RectF(0, 0, width, height);
    final Matrix m = new Matrix();
    m.setRectToRect(srcRect, dstRect, Matrix.ScaleToFit.CENTER);
    canvas.setMatrix(m);
    canvas.drawCircle(inWidth / 2, inHeight / 2, inWidth / 2, paint);
    return output;
}

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From source file:com.google.android.marvin.utils.HighlightBoundsView.java

@Override
public void onDraw(Canvas c) {
    final int saveCount = c.save();
    c.translate(-SCREEN_LOCATION[0], -SCREEN_LOCATION[1]);
    c.setMatrix(mMatrix);

    mPaint.setColor(mHighlightColor);/*from w ww .j  a v a  2s. co m*/

    for (AccessibilityNodeInfoCompat node : mNodes) {
        node.getBoundsInScreen(mTemp);
        c.drawRect(mTemp, mPaint);
    }

    c.restoreToCount(saveCount);
}

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From source file:com.nextgis.maplibui.formcontrol.Sign.java

public void save(int width, int height, boolean transparentBackground, File sigFile) throws IOException {
    if (mNotInitialized)
        return;/*ww w  .j  av  a2 s  .  c  om*/

    float scale = Math.min((float) width / getWidth(), (float) height / getHeight());
    Matrix matrix = new Matrix();
    matrix.setScale(scale, scale);

    Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bmp);
    canvas.setMatrix(matrix);

    int color = transparentBackground ? Color.TRANSPARENT : 0xFFFFFF - mPaint.getColor();
    drawSign(canvas, color, mPaint);
    if (sigFile.exists() || sigFile.createNewFile()) {
        FileOutputStream out = new FileOutputStream(sigFile);
        bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
    }
}

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From source file:android.support.transition.GhostViewApi14.java

@Override
protected void onDraw(Canvas canvas) {
    // Apply the matrix while adjusting the coordinates
    mMatrix.set(mCurrentMatrix);/*from w  ww.j av  a 2 s .  c  o m*/
    mMatrix.postTranslate(mDeltaX, mDeltaY);
    canvas.setMatrix(mMatrix);
    // Draw the target
    mView.draw(canvas);
}

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From source file:org.uoyabause.android.PadButton.java

@Override
public void onDraw(Canvas canvas) {

    if (bitmap_pad_left == null || bitmap_pad_right == null) {
        return;// w  w w.  j a  v a2  s  .  co m
    }

    mPaint.setAlpha((int) (255.0f * _transparent));

    canvas.drawBitmap(bitmap_pad_left, matrix_left, mPaint);
    canvas.drawBitmap(bitmap_pad_right, matrix_right, mPaint);

    canvas.setMatrix(null);

    //canvas.save();
    //canvas.concat(matrix_left);
    //buttons[PadEvent.BUTTON_UP].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_DOWN].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_LEFT].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_RIGHT].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_START].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_LEFT_TRIGGER].draw(canvas, paint, apaint, tpaint);

    //canvas.restore();
    //canvas.concat(matrix_right);
    //buttons[PadEvent.BUTTON_A].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_B].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_C].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_X].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_Y].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_Z].draw(canvas, paint, apaint, tpaint);
    //buttons[PadEvent.BUTTON_RIGHT_TRIGGER].draw(canvas, paint, apaint, tpaint);

    if (_pad_mode == 1) {
        _analog_pad.draw(canvas, _axi_x, _axi_y, paint, apaint, tpaint);
    }
}

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From source file:com.codegarden.nativenavigation.JuceActivity.java

public final int[] renderGlyph(char glyph, Paint paint, android.graphics.Matrix matrix, Rect bounds) {
    Path p = new Path();
    paint.getTextPath(String.valueOf(glyph), 0, 1, 0.0f, 0.0f, p);

    RectF boundsF = new RectF();
    p.computeBounds(boundsF, true);//from w w  w .  j av a  2  s  . c  om
    matrix.mapRect(boundsF);

    boundsF.roundOut(bounds);
    bounds.left--;
    bounds.right++;

    final int w = bounds.width();
    final int h = Math.max(1, bounds.height());

    Bitmap bm = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

    Canvas c = new Canvas(bm);
    matrix.postTranslate(-bounds.left, -bounds.top);
    c.setMatrix(matrix);
    c.drawPath(p, paint);

    final int sizeNeeded = w * h;
    if (cachedRenderArray.length < sizeNeeded)
        cachedRenderArray = new int[sizeNeeded];

    bm.getPixels(cachedRenderArray, 0, w, 0, 0, w, h);
    bm.recycle();
    return cachedRenderArray;
}

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