Example usage for android.graphics ColorMatrix ColorMatrix

Introduction

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

Prototype

public ColorMatrix(ColorMatrix src)

Source Link

Document

Create a new colormatrix initialized with the specified colormatrix.

Usage

From source file:Main.java

public static Bitmap setBrightness(Bitmap srcBitmap, int brightness) {
    Bitmap bitmap = Bitmap.createBitmap(srcBitmap);
    ColorMatrix cm = new ColorMatrix(new float[] { 1, 0, 0, 0, brightness, 0, 1, 0, 0, brightness, 0, 0, 1, 0,
            brightness, 0, 0, 0, 1, 0 });
    Paint paint = new Paint();
    paint.setColorFilter(new ColorMatrixColorFilter(cm));
    Canvas canvas = new Canvas(bitmap);
    canvas.drawBitmap(srcBitmap, 0, 0, paint);
    return bitmap;
}

From source file:Main.java

public static Bitmap setContrast(Bitmap srcBitmap, float contrast) {
    Bitmap bitmap = Bitmap.createBitmap(srcBitmap);
    ColorMatrix cm = new ColorMatrix(
            new float[] { contrast, 0, 0, 0, 0, 0, contrast, 0, 0, 0, 0, 0, contrast, 0, 0, 0, 0, 0, 1, 0 });
    cm.setSaturation(contrast);/*from  w  ww .j  av a2s. c o  m*/
    Paint paint = new Paint();
    paint.setColorFilter(new ColorMatrixColorFilter(cm));
    Canvas canvas = new Canvas(bitmap);
    canvas.drawBitmap(srcBitmap, 0, 0, paint);
    return bitmap;
}

From source file:Main.java

/**
 * /*from   w ww .  j  a  v a  2 s.co  m*/
 * @param paint
 */
public static void invertCanvasColors(Paint paint) {
    float mx[] = { -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f,
            1.0f, 1.0f, 1.0f, 1.0f, 0.0f };
    ColorMatrix cm = new ColorMatrix(mx);
    paint.setColorFilter(new ColorMatrixColorFilter(cm));
}

From source file:Main.java

public static ColorFilter createColorFilterForOpacity(float opacity) {
    // 5x4 identity color matrix + fade the alpha to achieve opacity
    float[] matrix = { 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, opacity, 0 };

    return new ColorMatrixColorFilter(new ColorMatrix(matrix));
}

From source file:Main.java

public static final Bitmap alpha(Bitmap bitmap, int alpha) {
    float[] matrixItems = new float[] { 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, alpha / 255f, 0,
            0, 0, 0, 0, 1 };//from   ww w  . j  av  a 2 s  . c  om
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    Bitmap alphaBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Canvas canvas = new Canvas(alphaBitmap);
    Paint paint = new Paint();
    ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
    ColorMatrixColorFilter colorMatrixFilter = new ColorMatrixColorFilter(colorMatrix);
    paint.setColorFilter(colorMatrixFilter);
    canvas.drawBitmap(bitmap, 0, 0, paint);
    return alphaBitmap;
}

From source file:Main.java

public static void setGrayFilter(Drawable draw) {
    ColorMatrix cm = new ColorMatrix(new float[] { 0.299f, 0.587f, 0.114f, 0, 0, 0.299f, 0.587f, 0.114f, 0, 0,
            0.299f, 0.587f, 0.114f, 0, 0, 0, 0, 0, 1, 0 });
    setMatrixColorFilter(cm, draw);/*  w ww.j  a  v  a2s  .c  om*/
}

From source file:Main.java

public static void setReverseFilter(Drawable draw) {
    ColorMatrix cm = new ColorMatrix(
            new float[] { -1, 0, 0, 0, 255, 0, -1, 0, 0, 255, 0, 0, -1, 0, 255, 0, 0, 0, 1, 0 });
    setMatrixColorFilter(cm, draw);//www. java 2s. com
}

From source file:Main.java

/**
 * /* ww w  .j ava2s.  c om*/
 * @param paint
 */
public static void setThreshold(Paint paint, float threshold) {
    /*
     * Elevation matrix. This will threshold the elevation with GPS altitude.
     * The factor is used to increase the brightness for a given elevation map.
     * Elevation map is prepared so that altitudes from 0-5000 meter are encoded with 0-200 pixel values.
     * Each pixel level is 25 meter. 
     * 
     * Negative sign for black threshold instead of white.
     * Threshold of to 0 to 100 translated to 0 - 200 for all pixels thresholded at 5000 meters.
     * 
     * Calibrated (visually) at 
     * KRNO - 1346 meters, threshold = 28
     * KLXV - 3027 meters, threshold = 61
     * L70  - 811  meters, threshold = 16
     * KHIE - 326  meters, threshold = 7
     *--------------------------------------------
     *       5510                    = 112  ~ 50 meters per px
     * Formula to calculate threshold is:
     * threshold = altitude / 3 (meters per foot) / 50
     * Give 2 levels margin of safety
     */
    float factor = 4.f;
    float mx[] = { factor, 0, 0, 0, -(factor) * (threshold - 5) * 2.0f, 0, factor / 1.5f, 0, 0,
            -(factor) * (threshold - 5) * 2.0f, 0, 0, factor / 2.0f, 0, -(factor) * (threshold - 5) * 2.0f, 0,
            0, 0, 1, 0 };
    ColorMatrix cm = new ColorMatrix(mx);
    paint.setColorFilter(new ColorMatrixColorFilter(cm));
}

From source file:Main.java

/**
 * Copy the red channel to a new Bitmap's alpha channel.  The old
 * one will be recycled.//from w  ww  .ja  v  a 2  s  .c  om
 */
static Bitmap redToAlpha(Bitmap src, boolean recycle) {
    Bitmap dest = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Bitmap.Config.ARGB_8888);

    float[] matrix = new float[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 };

    Paint paint = new Paint();
    paint.setColorFilter(new ColorMatrixColorFilter(new ColorMatrix(matrix)));

    Canvas canvas = new Canvas(dest);
    canvas.setDensity(Bitmap.DENSITY_NONE);
    canvas.drawBitmap(src, 0, 0, paint);

    if (recycle)
        src.recycle();
    return dest;
}

From source file:Main.java

private static Drawable getSelectedDrawable(GradientDrawable mDrawable) {
    GradientDrawable gradientDrawable = (GradientDrawable) mDrawable.getConstantState().newDrawable();
    gradientDrawable.mutate();/*  w ww .  j  a  v  a  2s . c o m*/
    gradientDrawable.setColorFilter(new ColorMatrixColorFilter(new ColorMatrix(new float[] { 1, 0, 0, 0,
            -DRAW_DEEP, 0, 1, 0, 0, -DRAW_DEEP, 0, 0, 1, 0, -DRAW_DEEP, 0, 0, 0, 1, 0 })));
    return gradientDrawable;
}