Example usage for android.graphics Bitmap setPixels

Introduction

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

Prototype

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

Source Link

Document

Replace pixels in the bitmap with the colors in the array.

Usage

From source file:cmusv.mr.carbon.utils.QRCodeGenerator.java

public static Bitmap encodeAsBitmap(String contentsToEncode, int dimension, boolean isEncoded)
        throws WriterException {
    if (contentsToEncode == null) {
        return null;
    }//from w w w .j av a 2s  .c om
    if (isEncoded) {
        Base64 base64 = new Base64();
        contentsToEncode = new String(base64.encode(contentsToEncode.getBytes()));
    }

    Map<EncodeHintType, Object> hints = null;
    String encoding = guessAppropriateEncoding(contentsToEncode);
    if (encoding != null) {
        hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
        hints.put(EncodeHintType.CHARACTER_SET, encoding);
    }
    MultiFormatWriter writer = new MultiFormatWriter();
    BitMatrix result = writer.encode(contentsToEncode, format, dimension, dimension, hints);
    int width = result.getWidth();
    int height = result.getHeight();
    int[] pixels = new int[width * height];
    for (int y = 0; y < height; y++) {
        int offset = y * width;
        for (int x = 0; x < width; x++) {
            pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
        }
    }

    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return bitmap;
}

---

From source file:Main.java

/**
 * /*  w ww  .ja v  a  2s.co  m*/
 * TODO
 * ImageFormat.NV21 || format == ImageFormat.YUY2.
 * @param data
 * @param width
 * @param height
 * @param rect
 * @return
 */
public static Bitmap cropYuv2Bitmap(byte[] data, int width, int height, Rect rect) {
    int w = rect.width();
    int h = rect.height();
    int frameSize = width * height;
    int[] pixels = new int[w * h];
    byte[] yuv = data;
    int yOffset = rect.top * width + rect.left;
    int uvOffset = (rect.top / 2) * width + (rect.left / 2) * 2 + frameSize;
    int y, u, v, k;

    for (int i = 0; i < h; ++i) {
        int outputOffset = i * w;
        for (int j = 0; j < w; ++j) {
            y = (0xff & yuv[yOffset + j]) - 16;

            k = ((j >> 1) << 1);
            v = (0xff & yuv[uvOffset + k]) - 128;
            u = (0xff & yuv[uvOffset + k + 1]) - 128;

            int y1192 = 1192 * y;
            int r = (y1192 + 1634 * v);
            int g = (y1192 - 833 * v - 400 * u);
            int b = (y1192 + 2066 * u);

            if (r < 0)
                r = 0;
            else if (r > 262143)
                r = 262143;
            if (g < 0)
                g = 0;
            else if (g > 262143)
                g = 262143;
            if (b < 0)
                b = 0;
            else if (b > 262143)
                b = 262143;

            pixels[outputOffset + j] = 0xff000000 | ((r << 6) & 0xff0000) | ((g >> 2) & 0xff00)
                    | ((b >> 10) & 0xff);
        }
        yOffset += width;
        if (((rect.top + i) & 1) == 1) {
            uvOffset += width;
        }
    }
    Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    bitmap.setPixels(pixels, 0, w, 0, 0, w, h);
    return bitmap;
}

---

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++;/*  w  ww  .  ja  v a  2  s  .  c  o  m*/
    }
    return dest;
}

---

From source file:Main.java

/**
 * Convert bitmap format to <code>Bitmap.Config.ARGB_8888</code>.
 *
 * @param img/*  w ww .  j  ava 2s .  co  m*/
 *            JPEG bitmap to convert
 * @return {@link Bitmap} in ARGB8888 format
 */
public static Bitmap convertBitmapFormatToARGB888(Bitmap img) {
    int numPixels = img.getWidth() * img.getHeight();
    int[] pixels = new int[numPixels];

    // Get JPEG pixels. Each int is the color values for one pixel.
    img.getPixels(pixels, 0, img.getWidth(), 0, 0, img.getWidth(), img.getHeight());

    // Create a Bitmap of the appropriate format.
    Bitmap result = Bitmap.createBitmap(img.getWidth(), img.getHeight(), Bitmap.Config.ARGB_8888);

    // Set RGB pixels.
    result.setPixels(pixels, 0, result.getWidth(), 0, 0, result.getWidth(), result.getHeight());
    return result;
}

---

From source file:Main.java

/** Sets pixels in the given bitmap to a grayscale image from the byte array from a camera preview,
 * assumed to be in YUV (NV21) format with brightness pixels first.
 *//*from   www.  j  a  v  a  2 s . c o  m*/
public static Bitmap fillGrayscaleBitmapFromCameraData(Bitmap bitmap, byte[] cdata, int width, int height) {
    int[] pixels = new int[cdata.length];
    for (int i = 0; i < cdata.length; i++) {
        int g = 0xff & cdata[i];
        pixels[i] = (255 << 24) + (g << 16) + (g << 8) + g;
    }
    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return bitmap;
}

---

From source file:Main.java

/**
 * Replaces colors in a bitmap that are not farther away from a specific color than a given
 * threshold.//from w  ww  .j av  a2s  .  com
 *
 * @param srcBitmap    The source bitmap to scan.
 * @param mutateSrc    Indicates whether to mutate srcBitmap or to produce a new one.
 * @param keepCr       The red color to keep
 * @param keepCg       The green color to keep
 * @param keepCb       The blue color to keep
 * @param replaceColor The color to replace mismatched colors with
 * @param distance     The distance threshold.
 * @param simpleBG     Whether the bitmap has a simple background
 * @return Bitmap with replaced colors
 */
private static Bitmap replaceColors(Bitmap srcBitmap, boolean mutateSrc, int keepCr, int keepCg, int keepCb,
        int replaceColor, int distance, boolean simpleBG) {
    int[] allpixels = new int[srcBitmap.getHeight() * srcBitmap.getWidth()];
    srcBitmap.getPixels(allpixels, 0, srcBitmap.getWidth(), 0, 0, srcBitmap.getWidth(), srcBitmap.getHeight());
    int bgColor = replaceColor;
    int distanceSq = distance * distance;

    if (simpleBG) {
        bgColor = allpixels[0];
    }

    for (int i = 0; i < allpixels.length; i++) {
        /* Avoid unnecessary math for obviously background color. This removes most of the math
         * for candy, HP and name bitmaps. */
        if (allpixels[i] == bgColor) {
            allpixels[i] = replaceColor;
            continue;
        }
        int rDiff = keepCr - Color.red(allpixels[i]);
        int gDiff = keepCg - Color.green(allpixels[i]);
        int bDiff = keepCb - Color.blue(allpixels[i]);
        int dSq = rDiff * rDiff + gDiff * gDiff + bDiff * bDiff;
        if (dSq > distanceSq) {
            allpixels[i] = replaceColor;
        }
    }

    Bitmap dstBitmap;
    if (mutateSrc) {
        dstBitmap = srcBitmap;
    } else {
        dstBitmap = Bitmap.createBitmap(srcBitmap.getWidth(), srcBitmap.getHeight(), srcBitmap.getConfig());
    }
    dstBitmap.setPixels(allpixels, 0, srcBitmap.getWidth(), 0, 0, srcBitmap.getWidth(), srcBitmap.getHeight());
    return dstBitmap;
}

---

From source file:io.digibyte.tools.qrcode.QRUtils.java

public static Bitmap encodeAsBitmap(String content, int dimension) {

    if (content == null) {
        return null;
    }//  www  . j  a  va  2s. c  o m
    Map<EncodeHintType, Object> hints = null;
    String encoding = guessAppropriateEncoding(content);
    hints = new EnumMap<>(EncodeHintType.class);
    if (encoding != null) {
        hints.put(EncodeHintType.CHARACTER_SET, encoding);
    }
    hints.put(EncodeHintType.MARGIN, 1);
    BitMatrix result = null;
    try {
        result = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, dimension, dimension, hints);
    } catch (IllegalArgumentException iae) {
        // Unsupported format
        return null;
    } catch (WriterException e) {
        e.printStackTrace();
    }
    if (result == null)
        return null;
    int width = result.getWidth();
    int height = result.getHeight();
    int[] pixels = new int[width * height];
    for (int y = 0; y < height; y++) {
        int offset = y * width;
        for (int x = 0; x < width; x++) {
            pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
        }
    }

    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return bitmap;
}

---

From source file:Main.java

/** Sets pixels in the given bitmap to a grayscale image from the byte array from a camera preview,
 * assumed to be in YUV (NV21) format with brightness pixels first.
 *//*from w  w w.  j a v a2s.c  o m*/
public static Bitmap fillGrayscaleBitmapFromData(Bitmap bitmap, byte[] cdata, int width, int height,
        int[] pixelBuffer) {
    int npixels = width * height;
    for (int i = 0; i < npixels; i++) {
        int g = 0xff & cdata[i];
        pixelBuffer[i] = (255 << 24) + (g << 16) + (g << 8) + g;
    }
    bitmap.setPixels(pixelBuffer, 0, width, 0, 0, width, height);
    return bitmap;
}

---

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, Bitmap.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  ww  w  .ja  v a  2 s  . c o m*/
    blured.setPixels(inPixels, 0, width, 0, 0, width, height);
    return blured;
}

---

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);
    }// w ww  . j av a2 s  . c om
    blured.setPixels(inPixels, 0, width, 0, 0, width, height);
    return blured;
}

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