Examples with ColorMatrix android.graphics.ColorMatrix used on opensource projects

Example 21 with ColorMatrix

use of android.graphics.ColorMatrix in project android_frameworks_base by crdroidandroid.

the class ImageHelper method toGrayscale.

private static Bitmap toGrayscale(Bitmap bmpOriginal) {
    int width, height;
    height = bmpOriginal.getHeight();
    width = bmpOriginal.getWidth();
    Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bmpGrayscale);
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    ColorMatrix cm = new ColorMatrix();
    final Rect rect = new Rect(0, 0, width, height);
    cm.setSaturation(0);
    ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
    paint.setColorFilter(f);
    c.drawBitmap(bmpOriginal, rect, rect, paint);
    return bmpGrayscale;
}

Example 22 with ColorMatrix

use of android.graphics.ColorMatrix in project smartmodule by carozhu.

the class Bitmaputil method returnContrastBitmap.

/**
     * 改变bitmap 对比度
     *
     * @param bitmap
     * @param progress
     * @return
     */
public static Bitmap returnContrastBitmap(Bitmap bitmap, int progress) {
    //曝光度
    Bitmap contrast_bmp = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    // int brightness = progress - 127;
    float contrast = (float) ((progress + 64) / 128.0);
    ColorMatrix contrast_cMatrix = new ColorMatrix();
    contrast_cMatrix.set(new float[] { contrast, 0, 0, 0, 0, 0, // 改变对比度
    contrast, // 改变对比度
    0, // 改变对比度
    0, // 改变对比度
    0, 0, 0, contrast, 0, 0, 0, 0, 0, 1, 0 });
    Paint contrast_paint = new Paint();
    contrast_paint.setColorFilter(new ColorMatrixColorFilter(contrast_cMatrix));
    Canvas contrast_canvas = new Canvas(contrast_bmp);
    // 在Canvas上绘制一个已经存在的Bitmap。这样，dstBitmap就和srcBitmap一摸一样了
    contrast_canvas.drawBitmap(bitmap, 0, 0, contrast_paint);
    return contrast_bmp;
}

Example 23 with ColorMatrix

use of android.graphics.ColorMatrix in project android_frameworks_base by crdroidandroid.

the class ImageHelper method toGrayscale.

private static Bitmap toGrayscale(Bitmap bmpOriginal) {
    int width, height;
    height = bmpOriginal.getHeight();
    width = bmpOriginal.getWidth();
    Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bmpGrayscale);
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    ColorMatrix cm = new ColorMatrix();
    final Rect rect = new Rect(0, 0, width, height);
    cm.setSaturation(0);
    ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
    paint.setColorFilter(f);
    c.drawBitmap(bmpOriginal, rect, rect, paint);
    return bmpGrayscale;
}

Example 24 with ColorMatrix

use of android.graphics.ColorMatrix in project android_frameworks_base by crdroidandroid.

the class LockscreenShortcutsActivity method onCreate.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.lockscreen_shortcuts);
    getActionBar().setDisplayHomeAsUpEnabled(true);
    mPicker = new ShortcutPickHelper(this, this);
    mShortcutHelper = new LockscreenShortcutsHelper(this, this);
    ColorMatrix cm = new ColorMatrix();
    cm.setSaturation(0);
    mFilter = new ColorMatrixColorFilter(cm);
    ImageView unlockButton = (ImageView) findViewById(R.id.middle_button);
    mDefaultTintList = unlockButton.getImageTintList();
    createActionList();
    initiateViews();
    updateDrawables();
}

Example 25 with ColorMatrix

use of android.graphics.ColorMatrix in project 9GAG by Mixiaoxiao.

the class SquareProgressBar method setImageGrayscale.

/**
 * You can set the image to b/w with this method. Works fine with the
 * opacity.
 *
 * @param greyscale
 *            true if the grayscale should be activated.
 * @since 1.2.0 / but never used in the example application
 */
public void setImageGrayscale(boolean greyscale) {
    this.greyscale = greyscale;
    if (greyscale) {
        ColorMatrix matrix = new ColorMatrix();
        matrix.setSaturation(0);
        imageView.setColorFilter(new ColorMatrixColorFilter(matrix));
    } else {
        imageView.setColorFilter(null);
    }
}