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

Example 36 with Shader

use of android.graphics.Shader in project Resurrection_packages_apps_Settings by ResurrectionRemix.

the class FloatingActionButton method createInnerStrokesDrawable.

private Drawable createInnerStrokesDrawable(final int color, float strokeWidth) {
    if (!mStrokeVisible) {
        return new ColorDrawable(Color.TRANSPARENT);
    }
    ShapeDrawable shapeDrawable = new ShapeDrawable(new OvalShape());
    final int bottomStrokeColor = darkenColor(color);
    final int bottomStrokeColorHalfTransparent = halfTransparent(bottomStrokeColor);
    final int topStrokeColor = lightenColor(color);
    final int topStrokeColorHalfTransparent = halfTransparent(topStrokeColor);
    final Paint paint = shapeDrawable.getPaint();
    paint.setAntiAlias(true);
    paint.setStrokeWidth(strokeWidth);
    paint.setStyle(Style.STROKE);
    shapeDrawable.setShaderFactory(new ShaderFactory() {

        @Override
        public Shader resize(int width, int height) {
            return new LinearGradient(width / 2, 0, width / 2, height, new int[] { topStrokeColor, topStrokeColorHalfTransparent, color, bottomStrokeColorHalfTransparent, bottomStrokeColor }, new float[] { 0f, 0.2f, 0.5f, 0.8f, 1f }, TileMode.CLAMP);
        }
    });
    return shapeDrawable;
}

Example 37 with Shader

use of android.graphics.Shader in project apps-android-wikipedia by wikimedia.

the class GradientUtil method setPowerGradient.

/**
 * Create a power gradient by using a compound gradient composed of a series of linear
 * gradients with intermediate color values.
 * adapted from: https://github.com/romannurik/muzei/blob/master/main/src/main/java/com/google/android/apps/muzei/util/ScrimUtil.java
 * @param baseColor The color from which the gradient starts (the ending color is transparent).
 * @param gravity Where the gradient should start from. Note: when making horizontal gradients,
 *                remember to use START/END, instead of LEFT/RIGHT.
 */
private static void setPowerGradient(@NonNull PaintDrawable drawable, @ColorInt int baseColor, int gravity) {
    final int[] stopColors = new int[GRADIENT_NUM_STOPS];
    int red = Color.red(baseColor);
    int green = Color.green(baseColor);
    int blue = Color.blue(baseColor);
    int alpha = Color.alpha(baseColor);
    for (int i = 0; i < GRADIENT_NUM_STOPS; i++) {
        float x = i * 1f / (GRADIENT_NUM_STOPS - 1);
        float opacity = MathUtil.constrain((float) Math.pow(x, GRADIENT_POWER), 0.0f, 1.0f);
        stopColors[i] = Color.argb((int) (alpha * opacity), red, green, blue);
    }
    final float x0, x1, y0, y1;
    switch(gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
        case Gravity.START:
            x0 = 1;
            x1 = 0;
            break;
        case Gravity.END:
            x0 = 0;
            x1 = 1;
            break;
        default:
            x0 = 0;
            x1 = 0;
            break;
    }
    switch(gravity & Gravity.VERTICAL_GRAVITY_MASK) {
        case Gravity.TOP:
            y0 = 1;
            y1 = 0;
            break;
        case Gravity.BOTTOM:
            y0 = 0;
            y1 = 1;
            break;
        default:
            y0 = 0;
            y1 = 0;
            break;
    }
    drawable.setShaderFactory(new ShapeDrawable.ShaderFactory() {

        @Override
        public Shader resize(int width, int height) {
            return new LinearGradient(width * x0, height * y0, width * x1, height * y1, stopColors, null, Shader.TileMode.CLAMP);
        }
    });
}

Example 38 with Shader

use of android.graphics.Shader in project apps-android-wikipedia by wikimedia.

the class SnippetImage method drawGradient.

private static void drawGradient(@NonNull Canvas canvas) {
    // draw a dark gradient over the image, so that the white text
    // will stand out better against it.
    final int gradientStartColor = 0x60000000;
    final int gradientStopColor = 0xA0000000;
    Shader shader = new LinearGradient(0, 0, 0, canvas.getHeight(), gradientStartColor, gradientStopColor, Shader.TileMode.CLAMP);
    Paint paint = new Paint();
    paint.setShader(shader);
    canvas.drawRect(new Rect(0, 0, canvas.getWidth(), canvas.getHeight()), paint);
}

Example 39 with Shader

use of android.graphics.Shader in project Qblog_Android by qiaoyhh.

the class CircleImageTransformation method transform.

@Override
public Bitmap transform(Bitmap source) {
    int minEdge = Math.min(source.getWidth(), source.getHeight());
    int dx = (source.getWidth() - minEdge) / 2;
    int dy = (source.getHeight() - minEdge) / 2;
    // Init shader
    Shader shader = new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
    Matrix matrix = new Matrix();
    // Move the target area to center of the source bitmap
    matrix.setTranslate(-dx, -dy);
    shader.setLocalMatrix(matrix);
    // Init paint
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setShader(shader);
    // Create and draw circle bitmap
    Bitmap output = Bitmap.createBitmap(minEdge, minEdge, source.getConfig());
    Canvas canvas = new Canvas(output);
    canvas.drawOval(new RectF(0, 0, minEdge, minEdge), paint);
    // Recycle the source bitmap, because we already generate a new one
    source.recycle();
    return output;
}

Example 40 with Shader

use of android.graphics.Shader in project k-9 by k9mail.

the class ColorPicker method init.

private void init(AttributeSet attrs, int defStyle) {
    final TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.ColorPicker, defStyle, 0);
    mColorWheelStrokeWidth = a.getInteger(R.styleable.ColorPicker_wheel_size, 16);
    mPointerRadius = a.getInteger(R.styleable.ColorPicker_pointer_size, 48);
    a.recycle();
    Shader s = new SweepGradient(0, 0, COLORS, null);
    mColorWheelPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mColorWheelPaint.setShader(s);
    mColorWheelPaint.setStyle(Paint.Style.STROKE);
    mColorWheelPaint.setStrokeWidth(mColorWheelStrokeWidth);
    mPointerHaloPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mPointerHaloPaint.setColor(Color.BLACK);
    mPointerHaloPaint.setStrokeWidth(5);
    mPointerHaloPaint.setAlpha(0x60);
    mPointerColor = new Paint(Paint.ANTI_ALIAS_FLAG);
    mPointerColor.setStrokeWidth(5);
    mAngle = (float) (-Math.PI / 2);
    mPointerColor.setColor(calculateColor(mAngle));
}