Examples with Canvas android.graphics.Canvas used on opensource projects

Example 21 with Canvas

use of android.graphics.Canvas in project Lazy by l123456789jy.

the class ImageProcessor method lum.

/**
     * 亮度处理
     * @param lumValue 新的亮度值
     * @return 改变了亮度值之后的图片
     */
public Bitmap lum(int lumValue) {
    //计算出符合要求的亮度值
    float newlumValue = lumValue * 1.0F / 127;
    //创建一个颜色矩阵
    ColorMatrix lumColorMatrix = new ColorMatrix();
    //设置亮度值
    lumColorMatrix.setScale(newlumValue, newlumValue, newlumValue, 1);
    //创建一个画笔并设置其颜色过滤器
    Paint paint = new Paint();
    paint.setColorFilter(new ColorMatrixColorFilter(lumColorMatrix));
    //创建一个新的图片并创建画布
    Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(newBitmap);
    //将原图使用给定的画笔画到画布上
    canvas.drawBitmap(bitmap, 0, 0, paint);
    return newBitmap;
}

Example 22 with Canvas

use of android.graphics.Canvas in project Lazy by l123456789jy.

the class BitmapUtil method hue.

/**
     * 色相处理
     *
     * @param bitmap   原图
     * @param hueValue 新的色相值
     * @return 改变了色相值之后的图片
     */
public static Bitmap hue(Bitmap bitmap, int hueValue) {
    // 计算出符合要求的色相值
    float newHueValue = (hueValue - 127) * 1.0F / 127 * 180;
    // 创建一个颜色矩阵
    ColorMatrix hueColorMatrix = new ColorMatrix();
    // 控制让红色区在色轮上旋转的角度
    hueColorMatrix.setRotate(0, newHueValue);
    // 控制让绿红色区在色轮上旋转的角度
    hueColorMatrix.setRotate(1, newHueValue);
    // 控制让蓝色区在色轮上旋转的角度
    hueColorMatrix.setRotate(2, newHueValue);
    // 创建一个画笔并设置其颜色过滤器
    Paint paint = new Paint();
    paint.setColorFilter(new ColorMatrixColorFilter(hueColorMatrix));
    // 创建一个新的图片并创建画布
    Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(newBitmap);
    // 将原图使用给定的画笔画到画布上
    canvas.drawBitmap(bitmap, 0, 0, paint);
    return newBitmap;
}

Example 23 with Canvas

use of android.graphics.Canvas in project enroscar by stanfy.

the class BufferBitmapDecorator method reset.

/**
   * Prepare for new width and hight.
   * @param width new width
   * @param height new height
   */
protected void reset(final int width, final int height) {
    Bitmap bitmap = this.bitmap;
    // recycle old buffer
    if (bitmap != null) {
        bitmap.recycle();
    }
    // high quality
    bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    this.bitmap = bitmap;
    this.bitmapCanvas = new Canvas(bitmap);
}

Example 24 with Canvas

use of android.graphics.Canvas in project enroscar by stanfy.

the class CropStartDecorator method setup.

@Override
public void setup(final int width, final int height, final int[] state, final int level, final int sourceWidth, final int sourceHeight) {
    // high quality
    this.bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    this.bitmapCanvas = new Canvas(bitmap);
    this.dstBounds.set(0, 0, Math.min(width, sourceWidth), Math.min(height, sourceHeight));
}

Example 25 with Canvas

use of android.graphics.Canvas in project enroscar by stanfy.

the class MaskImageDecorator method processBitmap.

@Override
public Bitmap processBitmap(final Bitmap source, final Canvas sourceCanvas) {
    if (source == null) {
        return null;
    }
    final Bitmap buffer = this.bitmap;
    if (buffer == null) {
        return source;
    }
    buffer.eraseColor(0);
    final Canvas bufferCanvas = this.bitmapCanvas;
    final RectF rect = this.rect;
    // prepare mask
    switch(mode) {
        case CUSTOM_MASK:
            bufferCanvas.drawBitmap(mask, 0, 0, fillPaint);
            break;
        case CORNERS_MASK:
            if (radiusArray == null) {
                float radius = this.radius;
                final float r = Math.min(rect.width(), rect.height()) * 0.5f;
                if (radius > r) {
                    radius = r;
                }
                bufferCanvas.drawRoundRect(rect, radius, radius, fillPaint);
            } else {
                final Path path = this.path;
                path.reset();
                path.addRoundRect(rect, radiusArray, Path.Direction.CW);
                bufferCanvas.drawPath(path, fillPaint);
            }
            break;
        default:
            return source;
    }
    // main drawing
    bufferCanvas.drawBitmap(source, 0, 0, maskPaint);
    // modify source
    source.eraseColor(0);
    sourceCanvas.drawBitmap(buffer, 0, 0, null);
    // return source
    return source;
}