Example usage for java.lang Math ceil

Introduction

In this page you can find the example usage for java.lang Math ceil.

Prototype

public static double ceil(double a)

Source Link

Document

Returns the smallest (closest to negative infinity) double value that is greater than or equal to the argument and is equal to a mathematical integer.

Usage

From source file:Main.java

public static RectF round(final RectF rect) {
    rect.left = (float) Math.floor(rect.left);
    rect.top = (float) Math.floor(rect.top);
    rect.right = (float) Math.ceil(rect.right);
    rect.bottom = (float) Math.ceil(rect.bottom);
    return rect;/*from ww w  .  j  a  va  2  s .  c  o  m*/
}

From source file:Main.java

public static float getDesiredHeight(TextPaint paint) {
    FontMetrics fm = paint.getFontMetrics();
    return (float) Math.ceil(fm.descent - fm.ascent);
}

From source file:Main.java

private static int computeInitialSampleSize(BitmapFactory.Options options, int minSideLength,
        int maxNumOfPixels) {
    double w = options.outWidth;
    double h = options.outHeight;
    int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));
    int upperBound = (minSideLength == -1) ? 128
            : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));
    if (upperBound < lowerBound) {
        // return the larger one when there is no overlapping zone.
        return lowerBound;
    }/*w w  w  .  ja v a 2 s.  co m*/
    if ((maxNumOfPixels == -1) && (minSideLength == -1)) {
        return 1;
    } else if (minSideLength == -1) {
        return lowerBound;
    } else {
        return upperBound;
    }
}

From source file:Main.java

private static int computeInitialSampleSize(BitmapFactory.Options options, int minSideLength,
        int maxNumOfPixels) {
    double w = options.outWidth;
    double h = options.outHeight;

    int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));
    int upperBound = (minSideLength == -1) ? 1280
            : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));

    if (upperBound < lowerBound) {
        // return the larger one when there is no overlapping zone.
        return lowerBound;
    }/*from w w  w  .  ja v a2s.  c  o  m*/

    if ((maxNumOfPixels == -1) && (minSideLength == -1)) {
        return 1;
    } else if (minSideLength == -1) {
        return lowerBound;
    } else {
        return upperBound;
    }
}

From source file:Main.java

private static int computeInitialSampleSize(Options options, int minSideLength, int maxNumOfPixels) {
    double w = options.outWidth;
    double h = options.outHeight;

    int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));
    int upperBound = (minSideLength == -1) ? 128
            : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));

    if (upperBound < lowerBound) {
        // return the larger one when there is no overlapping zone.
        return lowerBound;
    }/*from  w  w  w .j  a v a  2  s  .  co m*/

    if ((maxNumOfPixels == -1) && (minSideLength == -1)) {
        return 1;
    } else if (minSideLength == -1) {
        return lowerBound;
    } else {
        return upperBound;
    }
}

From source file:Main.java

public static int getInSampleSize(double scale) {
    double log = Math.log(scale) / Math.log(2);
    double logCeil = Math.ceil(log);
    return ((int) Math.pow(2, logCeil) + 1);
}

From source file:Main.java

public static double getRoundedDistance(double distance) {
    return Math.ceil(distance * 100.0D) / 100.0D;
}

From source file:Main.java

public static int getScaledImageSize(int maxZoomLevel, int currZoomLevel, int size) {
    double scale = 1.0 / Math.pow(2, maxZoomLevel - currZoomLevel);

    return (int) Math.ceil(size * scale);
}

From source file:Main.java

/**
 * NOTE: Arithmetic operations in primitive types may lead to arithmetic overflow. To retain
 * precision, BigDecimal objects are used.
 *
 * @param rgb/*from   w  w w  .  ja v a2 s  .  com*/
 * @return
 */
public static int[] convertRGB_8_8_8_To_HSB_32_32_32(int[] rgb) {
    int[] hsb = new int[3];
    int maxChroma = Math.max(Math.max(rgb[0], rgb[1]), rgb[2]);
    int minChroma = Math.min(Math.min(rgb[0], rgb[1]), rgb[2]);
    int diff = maxChroma - minChroma;

    // Hue
    BigDecimal hue;
    if (diff == 0) {
        hue = BigDecimal.ZERO;
    } else if (maxChroma == rgb[0]) {
        float tmp = (rgb[1] - rgb[2]) / (float) diff;
        if (tmp < 0) {
            tmp += 6 * Math.ceil(-tmp / 6.0);
        } else {
            tmp -= 6 * Math.floor(tmp / 6.0);
        }
        hue = BigDecimal.valueOf(tmp);
    } else if (maxChroma == rgb[1]) {
        hue = BigDecimal.valueOf((rgb[2] - rgb[0]) / (float) diff + 2);
    } else {
        hue = BigDecimal.valueOf((rgb[0] - rgb[1]) / (float) diff + 4);
    }
    // [0, 360] -> [0, 0xffffffff]
    hue = hue.multiply(BigDecimal.valueOf(0xffffffffL));
    hue = hue.divide(BigDecimal.valueOf(6), RoundingMode.FLOOR);
    hsb[0] = ByteBuffer.allocate(8).putLong(hue.longValue()).getInt(4);

    // Saturation
    if (maxChroma == 0) {
        hsb[1] = 0;
    } else {
        // [0, 1] -> [0, 0xffffffff]
        BigDecimal sat = BigDecimal.valueOf(diff);
        sat = sat.multiply(BigDecimal.valueOf(0xffffffffL));
        sat = sat.divide(BigDecimal.valueOf(maxChroma), RoundingMode.FLOOR);
        hsb[1] = ByteBuffer.allocate(8).putLong(sat.longValue()).getInt(4);
    }

    // Brightness
    // [0, 255] -> [0, 0xffffffff]
    BigDecimal brightness = BigDecimal.valueOf(maxChroma);
    brightness = brightness.multiply(BigDecimal.valueOf(0xffffffffL));
    brightness = brightness.divide(BigDecimal.valueOf(0xffL), RoundingMode.FLOOR);
    hsb[2] = ByteBuffer.allocate(8).putLong(brightness.longValue()).getInt(4);

    return hsb;
}

From source file:Main.java

private static int computeInitialSampleSize(BitmapFactory.Options options, int minSideLength,
        int maxNumOfPixels) {
    double w = options.outWidth;
    double h = options.outHeight;

    int lowerBound = (maxNumOfPixels < 0) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));
    int upperBound = (minSideLength < 0) ? 128
            : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));

    if (upperBound < lowerBound) {
        // return the larger one when there is no overlapping zone.
        return lowerBound;
    }/*from w w w . ja v a 2  s  . c  om*/

    if (maxNumOfPixels < 0 && minSideLength < 0) {
        return 1;
    } else if (minSideLength < 0) {
        return lowerBound;
    } else {
        return upperBound;
    }
}