Example usage for android.graphics Bitmap getPixels

Introduction

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

Prototype

public void getPixels(@ColorInt int[] pixels, int offset, int stride, int x, int y, int width, int height) 

Source Link

Document

Returns in pixels[] a copy of the data in the bitmap.

Usage

From source file:Main.java

public static Bitmap getBlur(Bitmap bitmap) {
    int iterations = 1;
    int radius = 8;
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int[] inPixels = new int[width * height];
    int[] outPixels = new int[width * height];
    Bitmap blured = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    bitmap.getPixels(inPixels, 0, width, 0, 0, width, height);
    for (int i = 0; i < iterations; i++) {
        blur(inPixels, outPixels, width, height, radius);
        blur(outPixels, inPixels, height, width, radius);
    }/*from   w w  w.  j  a v  a 2 s  . co  m*/
    blured.setPixels(inPixels, 0, width, 0, 0, width, height);
    return blured;
}

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From source file:Main.java

public static Bitmap createBitmapWithAlphaMask(Bitmap bmpSource, Bitmap bmpMask) {
    int width = bmpSource.getWidth();
    int height = bmpSource.getHeight();
    int size = width * height;

    if (width != bmpMask.getWidth() || height != bmpMask.getHeight())
        bmpMask = resize(bmpMask, width, height);

    int[] result = new int[size];
    int[] mask = new int[size];
    bmpSource.getPixels(result, 0, width, 0, 0, width, height);
    bmpMask.getPixels(mask, 0, width, 0, 0, width, height);

    int alphaMask = 0xff000000;
    int colorMask = 0x00ffffff;
    for (int i = 0; i < size; i++) {
        result[i] = (mask[i] & alphaMask) | (result[i] & colorMask);
    }//www .  j av a 2s . c  om

    // ensuring the bitmap is mutable
    Bitmap bmpResult = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    bmpResult.setPixels(result, 0, width, 0, 0, width, height);

    return bmpResult;
}

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From source file:Main.java

public static Bitmap handleImagePixelsRelief(Bitmap bm) {
    Bitmap bmp = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_8888);
    int width = bm.getWidth();
    int height = bm.getHeight();
    int color = 0, colorBefore = 0;
    int a, r, g, b;
    int r1, g1, b1;

    int[] oldPx = new int[width * height];
    int[] newPx = new int[width * height];

    bm.getPixels(oldPx, 0, bm.getWidth(), 0, 0, width, height);
    for (int i = 1; i < width * height; i++) {
        colorBefore = oldPx[i - 1];/*w w w  .j  av  a2 s.co m*/
        a = Color.alpha(colorBefore);
        r = Color.red(colorBefore);
        g = Color.green(colorBefore);
        b = Color.blue(colorBefore);

        color = oldPx[i];
        r1 = Color.red(color);
        g1 = Color.green(color);
        b1 = Color.blue(color);

        r = (r - r1 + 127);
        g = (g - g1 + 127);
        b = (b - b1 + 127);
        if (r > 255) {
            r = 255;
        }
        if (g > 255) {
            g = 255;
        }
        if (b > 255) {
            b = 255;
        }
        newPx[i] = Color.argb(a, r, g, b);
    }
    bmp.setPixels(newPx, 0, width, 0, 0, width, height);
    return bmp;
}

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From source file:Main.java

public static Bitmap nostalgic(Bitmap bitmap) {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    Bitmap newBitmap = Bitmap.createBitmap(width, height, Config.RGB_565);
    int pixColor = 0;
    int pixR = 0;
    int pixG = 0;
    int pixB = 0;
    int newR = 0;
    int newG = 0;
    int newB = 0;
    int[] pixels = new int[width * height];
    bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
    for (int i = 0; i < height; i++) {
        for (int k = 0; k < width; k++) {
            pixColor = pixels[width * i + k];
            pixR = Color.red(pixColor);
            pixG = Color.green(pixColor);
            pixB = Color.blue(pixColor);
            newR = (int) (0.393 * pixR + 0.769 * pixG + 0.189 * pixB);
            newG = (int) (0.349 * pixR + 0.686 * pixG + 0.168 * pixB);
            newB = (int) (0.272 * pixR + 0.534 * pixG + 0.131 * pixB);
            int newColor = Color.argb(255, newR > 255 ? 255 : newR, newG > 255 ? 255 : newG,
                    newB > 255 ? 255 : newB);
            pixels[width * i + k] = newColor;
        }//from   ww w  .ja va  2 s . com
    }
    newBitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return newBitmap;
}

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From source file:Main.java

public static Bitmap emboss(Bitmap bmp) {
    int width = bmp.getWidth();
    int height = bmp.getHeight();
    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);

    int pixR = 0;
    int pixG = 0;
    int pixB = 0;

    int pixColor = 0;

    int newR = 0;
    int newG = 0;
    int newB = 0;

    int[] pixels = new int[width * height];
    bmp.getPixels(pixels, 0, width, 0, 0, width, height);
    int pos = 0;//w w  w. j  a  v a 2 s.c  om
    for (int i = 1, length = height - 1; i < length; i++) {
        for (int k = 1, len = width - 1; k < len; k++) {
            pos = i * width + k;
            pixColor = pixels[pos];

            pixR = Color.red(pixColor);
            pixG = Color.green(pixColor);
            pixB = Color.blue(pixColor);

            pixColor = pixels[pos + 1];
            newR = Color.red(pixColor) - pixR + 127;
            newG = Color.green(pixColor) - pixG + 127;
            newB = Color.blue(pixColor) - pixB + 127;

            newR = Math.min(255, Math.max(0, newR));
            newG = Math.min(255, Math.max(0, newG));
            newB = Math.min(255, Math.max(0, newB));

            pixels[pos] = Color.argb(255, newR, newG, newB);
        }
    }

    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return bitmap;
}

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From source file:android.support.v7.testutils.TestUtils.java

/**
 * Checks whether all the pixels in the specified bitmap are of the same specified color.
 *
 * In case there is a color mismatch, the behavior of this method depends on the
 * <code>throwExceptionIfFails</code> parameter. If it is <code>true</code>, this method will
 * throw an <code>Exception</code> describing the mismatch. Otherwise this method will call
 * <code>Assert.fail</code> with detailed description of the mismatch.
 *///from  w w  w  .j ava 2  s .  c  o  m
public static void assertAllPixelsOfColor(String failMessagePrefix, @NonNull Bitmap bitmap, int bitmapWidth,
        int bitmapHeight, @ColorInt int color, int allowedComponentVariance, boolean throwExceptionIfFails) {
    int[] rowPixels = new int[bitmapWidth];
    for (int row = 0; row < bitmapHeight; row++) {
        bitmap.getPixels(rowPixels, 0, bitmapWidth, 0, row, bitmapWidth, 1);
        for (int column = 0; column < bitmapWidth; column++) {
            int sourceAlpha = Color.alpha(rowPixels[column]);
            int sourceRed = Color.red(rowPixels[column]);
            int sourceGreen = Color.green(rowPixels[column]);
            int sourceBlue = Color.blue(rowPixels[column]);

            int expectedAlpha = Color.alpha(color);
            int expectedRed = Color.red(color);
            int expectedGreen = Color.green(color);
            int expectedBlue = Color.blue(color);

            int varianceAlpha = Math.abs(sourceAlpha - expectedAlpha);
            int varianceRed = Math.abs(sourceRed - expectedRed);
            int varianceGreen = Math.abs(sourceGreen - expectedGreen);
            int varianceBlue = Math.abs(sourceBlue - expectedBlue);

            boolean isColorMatch = (varianceAlpha <= allowedComponentVariance)
                    && (varianceRed <= allowedComponentVariance) && (varianceGreen <= allowedComponentVariance)
                    && (varianceBlue <= allowedComponentVariance);

            if (!isColorMatch) {
                String mismatchDescription = failMessagePrefix + ": expected all drawable colors to be ["
                        + expectedAlpha + "," + expectedRed + "," + expectedGreen + "," + expectedBlue
                        + "] but at position (" + row + "," + column + ") out of (" + bitmapWidth + ","
                        + bitmapHeight + ") found [" + sourceAlpha + "," + sourceRed + "," + sourceGreen + ","
                        + sourceBlue + "]";
                if (throwExceptionIfFails) {
                    throw new RuntimeException(mismatchDescription);
                } else {
                    Assert.fail(mismatchDescription);
                }
            }
        }
    }
}

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From source file:Main.java

public static Bitmap emboss(Bitmap bitmap) {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    Bitmap newBitmap = Bitmap.createBitmap(width, height, Config.RGB_565);

    int pixR = 0;
    int pixG = 0;
    int pixB = 0;

    int pixColor = 0;

    int newR = 0;
    int newG = 0;
    int newB = 0;

    int[] pixels = new int[width * height];
    bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
    int pos = 0;/*from   ww w . j a  va2  s . c o  m*/
    for (int i = 1, length = height - 1; i < length; i++) {
        for (int k = 1, len = width - 1; k < len; k++) {
            pos = i * width + k;
            pixColor = pixels[pos];

            pixR = Color.red(pixColor);
            pixG = Color.green(pixColor);
            pixB = Color.blue(pixColor);

            pixColor = pixels[pos + 1];
            newR = Color.red(pixColor) - pixR + 127;
            newG = Color.green(pixColor) - pixG + 127;
            newB = Color.blue(pixColor) - pixB + 127;

            newR = Math.min(255, Math.max(0, newR));
            newG = Math.min(255, Math.max(0, newG));
            newB = Math.min(255, Math.max(0, newB));

            pixels[pos] = Color.argb(255, newR, newG, newB);
        }
    }

    newBitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return newBitmap;
}

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From source file:Main.java

public static Bitmap cropCenterInside(Bitmap src, Rect rect) {
    int width = Math.min(src.getWidth(), rect.width());
    int height = Math.min(src.getHeight(), rect.height());
    int[] rowData = new int[width];
    int stride = src.getWidth();
    int x = (src.getWidth() - width) / 2;
    int y = (src.getHeight() - height) / 2;

    Bitmap dest = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);

    int delta = 0;
    while (delta < height) {
        src.getPixels(rowData, 0, stride, x, y + delta, width, 1);
        dest.setPixels(rowData, 0, stride, 0, delta, width, 1);
        delta++;//from  ww w  .ja va2 s.c o m
    }
    return dest;
}

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From source file:jahirfiquitiva.iconshowcase.utilities.utils.Utils.java

@SuppressWarnings("ConstantConditions")
public static Bitmap getWidgetPreview(@NonNull Bitmap bitmap, @ColorInt int colorToReplace) {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int[] pixels = new int[width * height];
    bitmap.getPixels(pixels, 0, width, 0, 0, width, height);

    int minX = width;
    int minY = height;
    int maxX = -1;
    int maxY = -1;

    Bitmap newBitmap = Bitmap.createBitmap(width, height, bitmap.getConfig());
    int pixel;//from  ww w .j a v  a2  s .  c  o m

    for (int y = 0; y < height; ++y) {
        for (int x = 0; x < width; ++x) {
            int index = y * width + x;
            pixel = pixels[index];
            if (pixel == colorToReplace) {
                pixels[index] = android.graphics.Color.TRANSPARENT;
            }
            if (pixels[index] != android.graphics.Color.TRANSPARENT) {
                if (x < minX)
                    minX = x;
                if (x > maxX)
                    maxX = x;
                if (y < minY)
                    minY = y;
                if (y > maxY)
                    maxY = y;
            }
        }
    }

    newBitmap.setPixels(pixels, 0, width, 0, 0, width, height);

    return Bitmap.createBitmap(newBitmap, minX, minY, (maxX - minX) + 1, (maxY - minY) + 1);
}

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From source file:org.thezero.qrfi.MainActivity.java

public static void handleDecodeImage(Uri imageUri) {
    if (imageUri != null) {
        try {//from   ww w.ja  va2s.c o m
            InputStream inputStream = c.getContentResolver().openInputStream(imageUri);
            Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
            if (bitmap == null) {
                Log.e(TAG, "uri is not a bitmap," + imageUri.toString());
                return;
            }
            int width = bitmap.getWidth(), height = bitmap.getHeight();
            int[] pixels = new int[width * height];
            bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
            bitmap.recycle();
            //noinspection UnusedAssignment
            bitmap = null;
            RGBLuminanceSource source = new RGBLuminanceSource(width, height, pixels);
            BinaryBitmap bBitmap = new BinaryBitmap(new HybridBinarizer(source));
            MultiFormatReader reader = new MultiFormatReader();
            try {
                Result result = reader.decode(bBitmap);
                //Toast.makeText(c, result.getText(), Toast.LENGTH_SHORT).show();
                SuperAwesomeCardFragment.connectAP(result);
            } catch (NotFoundException e) {
                Toast.makeText(c, c.getString(R.string.error_decode), Toast.LENGTH_SHORT).show();
            }
        } catch (FileNotFoundException e) {
            Log.e(TAG, "can not open file" + imageUri.toString(), e);
        }
    }
}

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