Example usage for android.graphics Canvas drawBitmap

List of usage examples for android.graphics Canvas drawBitmap

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Introduction

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

Prototype

public void drawBitmap(@NonNull Bitmap bitmap, @Nullable Rect src, @NonNull Rect dst, @Nullable Paint paint)

Source Link

Document

Draw the specified bitmap, scaling/translating automatically to fill the destination rectangle.

Usage

From source file:Main.java

public static void drawToCenterOfCanvas(Canvas canvas, Bitmap bp, int max_width, int max_height,
        Rect cacheRect) {/*from  w w  w.  j  av  a2s  .  c  om*/
    final int b_w = bp.getWidth();
    final int b_h = bp.getHeight();
    if (b_w <= max_width && b_h <= max_height) { // center aligned
        canvas.drawBitmap(bp, (max_width - b_w) / 2, (max_height - b_h) / 2, null);
    } else { // scaled fix given rect size
        final float s_w = 1.0f * max_width / b_w;
        final float s_h = 1.0f * max_height / b_h;
        final float f_s = Math.min(s_w, s_h);
        final int f_w = (int) (b_w * f_s);
        final int f_h = (int) (b_h * f_s);
        cacheRect.set(0, 0, f_w, f_h);
        cacheRect.offset((max_width - f_w) / 2, (max_height - f_h) / 2);
        canvas.drawBitmap(bp, null, cacheRect, null);
    }
}

From source file:Main.java

private static Bitmap composeBitmap(Bitmap firstBitmap, Bitmap secondBitmap, int direction) {
    if (firstBitmap == null) {
        return null;
    }//from  w ww.j a  v a 2  s.  com
    if (secondBitmap == null) {
        return firstBitmap;
    }
    final int fw = firstBitmap.getWidth();
    final int fh = firstBitmap.getHeight();
    final int sw = secondBitmap.getWidth();
    final int sh = secondBitmap.getHeight();
    Bitmap bitmap = null;
    Canvas canvas = null;
    if (direction == TOP) {
        bitmap = Bitmap.createBitmap(sw > fw ? sw : fw, fh + sh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(secondBitmap, 0, 0, null);
        canvas.drawBitmap(firstBitmap, 0, sh, null);
    } else if (direction == BOTTOM) {
        bitmap = Bitmap.createBitmap(fw > sw ? fw : sw, fh + sh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(firstBitmap, 0, 0, null);
        canvas.drawBitmap(secondBitmap, 0, fh, null);
    } else if (direction == LEFT) {
        bitmap = Bitmap.createBitmap(fw + sw, sh > fh ? sh : fh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(secondBitmap, 0, 0, null);
        canvas.drawBitmap(firstBitmap, sw, 0, null);
    } else if (direction == RIGHT) {
        bitmap = Bitmap.createBitmap(fw + sw, fh > sh ? fh : sh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(firstBitmap, 0, 0, null);
        canvas.drawBitmap(secondBitmap, fw, 0, null);
    }
    return bitmap;
}

From source file:Main.java

public static Bitmap toGrayscale(Bitmap bmpOriginal) {
    int width, height;
    height = bmpOriginal.getHeight();//w w  w . j a  v a 2  s  .c  om
    width = bmpOriginal.getWidth();
    Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bmpGrayscale);
    Paint paint = new Paint();
    ColorMatrix cm = new ColorMatrix();
    cm.setSaturation(0);
    ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
    paint.setColorFilter(f);
    c.drawBitmap(bmpOriginal, 0, 0, paint);
    return bmpGrayscale;
}

From source file:Main.java

public static Bitmap setGrayscale(Bitmap source) {
    int width, height;
    height = source.getHeight();//from  w w  w . ja va  2s  . c om
    width = source.getWidth();
    Bitmap bmpGrayScale = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bmpGrayScale);
    Paint paint = new Paint();
    ColorMatrix cm = new ColorMatrix();
    cm.setSaturation(0);
    ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
    paint.setColorFilter(f);
    c.drawBitmap(source, 0, 0, paint);
    return bmpGrayScale;
}

From source file:Main.java

public static Bitmap resizeDownAndCropCenter(Bitmap bitmap, int size, boolean recycle) {
    int w = bitmap.getWidth();
    int h = bitmap.getHeight();
    int minSide = Math.min(w, h);
    if (w == h && minSide <= size)
        return bitmap;
    size = Math.min(size, minSide);

    float scale = Math.max((float) size / bitmap.getWidth(), (float) size / bitmap.getHeight());
    Bitmap target = Bitmap.createBitmap(size, size, getConfig(bitmap));
    int width = Math.round(scale * bitmap.getWidth());
    int height = Math.round(scale * bitmap.getHeight());
    Canvas canvas = new Canvas(target);
    canvas.translate((size - width) / 2f, (size - height) / 2f);
    canvas.scale(scale, scale);//from www .  j a  va 2s  .  c om
    Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG);
    canvas.drawBitmap(bitmap, 0, 0, paint);
    if (recycle)
        bitmap.recycle();
    return target;
}

From source file:Main.java

public static Bitmap resizeAndCropCenter(Bitmap bitmap, int size, boolean recycle) {
    int w = bitmap.getWidth();
    int h = bitmap.getHeight();
    if (w == size && h == size)
        return bitmap;

    // scale the image so that the shorter side equals to the target;
    // the longer side will be center-cropped.
    float scale = (float) size / Math.min(w, h);

    Bitmap target = Bitmap.createBitmap(size, size, getConfig(bitmap));
    int width = Math.round(scale * bitmap.getWidth());
    int height = Math.round(scale * bitmap.getHeight());
    Canvas canvas = new Canvas(target);
    canvas.translate((size - width) / 2f, (size - height) / 2f);
    canvas.scale(scale, scale);//from w  ww .j ava2  s.com
    Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG);
    canvas.drawBitmap(bitmap, 0, 0, paint);
    if (recycle)
        bitmap.recycle();
    return target;
}

From source file:Main.java

public static int drawIn(Canvas canvas, Bitmap bitmap, Rect display, int x) {
    if (bitmap != null) {
        Rect source = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
        display = new Rect(display.left + x, display.top + x, display.right - x, display.bottom - x);
        canvas.drawBitmap(bitmap, source, display, null);
        return x + display.width();
    }//from  w  w w. ja  v  a 2  s.co m
    return 0;
}

From source file:Main.java

/**
 * clip source bitmap into a circle bitmap
 *
 * @param src     the source bitmap/*w  ww .ja va 2  s.  co  m*/
 * @param recycle whether recycle the source bitmap
 * @param config  bitmap config
 * @return clipped  circle bitmap
 */
public static Bitmap createCircleBitmap(Bitmap src, boolean recycle, Bitmap.Config config) {
    if (src == null) {
        return null;
    }
    if (config == null) {
        config = Bitmap.Config.ARGB_8888;
    }
    Bitmap out = Bitmap.createBitmap(src.getWidth(), src.getHeight(), config);
    final Rect rect = new Rect(0, 0, Math.min(src.getWidth(), src.getHeight()),
            Math.min(src.getWidth(), src.getHeight()));
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    Canvas canvas = new Canvas(out);
    canvas.drawARGB(0, 0, 0, 0);
    RectF rectF = new RectF(rect);
    canvas.drawOval(rectF, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(src, rect, rect, paint);

    if (recycle) {
        src.recycle();
    }

    return out;

}

From source file:Main.java

public static final Bitmap complementedBitmapByAlpha(Bitmap bitmap) {
    if (null == bitmap) {
        return null;
    }//from  w  ww  . j  a  v  a 2s.  c o m

    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    if (width == height) {
        return bitmap;
    }

    int len = width > height ? width : height;
    Bitmap output = Bitmap.createBitmap(len, len, Config.ARGB_8888);
    Canvas canvas = new Canvas(output);
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setAlpha(0);
    canvas.drawPaint(paint);

    if (width > height) {
        int devide = (width - height) / 2;
        canvas.drawBitmap(bitmap, 0, devide, paint_comm);
    } else {
        int devide = (height - width) / 2;
        canvas.drawBitmap(bitmap, devide, 0, paint_comm);
    }
    return output;
}

From source file:Main.java

private static Bitmap getResizeBitmap(View view, Bitmap bitmap) {
    Bitmap overlay = Bitmap.createBitmap((int) (view.getMeasuredWidth() / sScaleFactor),
            (int) (view.getMeasuredHeight() / sScaleFactor), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(overlay);
    canvas.translate(-view.getLeft() / sScaleFactor, -view.getTop() / sScaleFactor);
    canvas.scale(1 / sScaleFactor, 1 / sScaleFactor);
    Paint paint = new Paint();
    paint.setFlags(Paint.FILTER_BITMAP_FLAG);
    canvas.drawBitmap(bitmap, 0, 0, paint);
    return overlay;
}