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

Example 76 with LinearGradient

use of android.graphics.LinearGradient in project iosched by google.

the class UIUtils method makeCubicGradientScrimDrawable.

//    private static final float[] mAlphaMatrixValues = {
//            0, 0, 0, 0, 0,
//            0, 0, 0, 0, 0,
//            0, 0, 0, 0, 0,
//            0, 0, 0, 1, 0
//    };
//    private static final ColorMatrix mMultiplyBlendMatrix = new ColorMatrix();
//    private static final float[] mMultiplyBlendMatrixValues = {
//            0, 0, 0, 0, 0,
//            0, 0, 0, 0, 0,
//            0, 0, 0, 0, 0,
//            0, 0, 0, 1, 0
//    };
//    private static final ColorMatrix mWhitenessColorMatrix = new ColorMatrix();
//
//    /**
//     * Simulates alpha blending an image with {@param color}.
//     */
//    private static ColorMatrix alphaMatrix(float alpha, int color) {
//        mAlphaMatrixValues[0] = 255 * alpha / 255;
//        mAlphaMatrixValues[6] = Color.green(color) * alpha / 255;
//        mAlphaMatrixValues[12] = Color.blue(color) * alpha / 255;
//        mAlphaMatrixValues[4] = 255 * (1 - alpha);
//        mAlphaMatrixValues[9] = 255 * (1 - alpha);
//        mAlphaMatrixValues[14] = 255 * (1 - alpha);
//        mWhitenessColorMatrix.set(mAlphaMatrixValues);
//        return mWhitenessColorMatrix;
//    }
//    /**
//     * Simulates multiply blending an image with a single {@param color}.
//     *
//     * Multiply blending is [Sa * Da, Sc * Dc]. See {@link android.graphics.PorterDuff}.
//     */
//    private static ColorMatrix multiplyBlendMatrix(int color, float alpha) {
//        mMultiplyBlendMatrixValues[0] = multiplyBlend(Color.red(color), alpha);
//        mMultiplyBlendMatrixValues[6] = multiplyBlend(Color.green(color), alpha);
//        mMultiplyBlendMatrixValues[12] = multiplyBlend(Color.blue(color), alpha);
//        mMultiplyBlendMatrix.set(mMultiplyBlendMatrixValues);
//        return mMultiplyBlendMatrix;
//    }
//
//    private static float multiplyBlend(int color, float alpha) {
//        return color * alpha / 255.0f + (1 - alpha);
//    }
/**
     * This helper method creates a 'nice' scrim or background protection for layering text over an
     * image. This non-linear scrim is less noticable than a linear or constant one.
     * <p/>
     * Borrowed from github.com/romannurik/muzei
     * <p/>
     * Creates an approximated cubic gradient using a multi-stop linear gradient. See <a
     * href="https://plus.google.com/+RomanNurik/posts/2QvHVFWrHZf">this post</a> for more details.
     */
public static Drawable makeCubicGradientScrimDrawable(int baseColor, int numStops, int gravity) {
    numStops = Math.max(numStops, 2);
    PaintDrawable paintDrawable = new PaintDrawable();
    paintDrawable.setShape(new RectShape());
    final int[] stopColors = new int[numStops];
    int alpha = Color.alpha(baseColor);
    for (int i = 0; i < numStops; i++) {
        double x = i * 1f / (numStops - 1);
        double opacity = Math.max(0, Math.min(1, Math.pow(x, 3)));
        stopColors[i] = (baseColor & 0x00ffffff) | ((int) (alpha * opacity) << 24);
    }
    final float x0, x1, y0, y1;
    switch(gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
        case Gravity.LEFT:
            x0 = 1;
            x1 = 0;
            break;
        case Gravity.RIGHT:
            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;
    }
    paintDrawable.setShaderFactory(new ShapeDrawable.ShaderFactory() {

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

Example 77 with LinearGradient

use of android.graphics.LinearGradient in project lottie-android by airbnb.

the class GradientFillContent method getGradient.

private LinearGradient getGradient() {
    int gradientHash = getGradientHash();
    LinearGradient gradient = gradientCache.get(gradientHash);
    if (gradient != null) {
        return gradient;
    }
    PointF startPoint = startPointAnimation.getValue();
    PointF endPoint = endPointAnimation.getValue();
    GradientColor gradientColor = colorAnimation.getValue();
    int[] colors = gradientColor.getColors();
    float[] positions = gradientColor.getPositions();
    int x0 = (int) (boundsRect.left + boundsRect.width() / 2 + startPoint.x);
    int y0 = (int) (boundsRect.top + boundsRect.height() / 2 + startPoint.y);
    int x1 = (int) (boundsRect.left + boundsRect.width() / 2 + endPoint.x);
    int y1 = (int) (boundsRect.top + boundsRect.height() / 2 + endPoint.y);
    gradient = new LinearGradient(x0, y0, x1, y1, colors, positions, Shader.TileMode.CLAMP);
    gradientCache.put(gradientHash, gradient);
    return gradient;
}

Example 78 with LinearGradient

use of android.graphics.LinearGradient in project platform_frameworks_base by android.

the class DecorView method initResizingPaints.

private void initResizingPaints() {
    final int startColor = mContext.getResources().getColor(R.color.resize_shadow_start_color, null);
    final int endColor = mContext.getResources().getColor(R.color.resize_shadow_end_color, null);
    final int middleColor = (startColor + endColor) / 2;
    mHorizontalResizeShadowPaint.setShader(new LinearGradient(0, 0, 0, mResizeShadowSize, new int[] { startColor, middleColor, endColor }, new float[] { 0f, 0.3f, 1f }, Shader.TileMode.CLAMP));
    mVerticalResizeShadowPaint.setShader(new LinearGradient(0, 0, mResizeShadowSize, 0, new int[] { startColor, middleColor, endColor }, new float[] { 0f, 0.3f, 1f }, Shader.TileMode.CLAMP));
}

Example 79 with LinearGradient

use of android.graphics.LinearGradient in project plaid by nickbutcher.

the class ScrimUtil method makeCubicGradientScrimDrawable.

/**
     * Creates an approximated cubic gradient using a multi-stop linear gradient. See
     * <a href="https://plus.google.com/+RomanNurik/posts/2QvHVFWrHZf">this post</a> for more
     * details.
     */
public static Drawable makeCubicGradientScrimDrawable(@ColorInt int baseColor, int numStops, int gravity) {
    numStops = Math.max(numStops, 2);
    PaintDrawable paintDrawable = new PaintDrawable();
    paintDrawable.setShape(new RectShape());
    final int[] stopColors = new int[numStops];
    int alpha = Color.alpha(baseColor);
    for (int i = 0; i < numStops; i++) {
        float x = i * 1f / (numStops - 1);
        float opacity = MathUtils.constrain(0, 1, (float) Math.pow(x, 3));
        stopColors[i] = ColorUtils.modifyAlpha(baseColor, (int) (alpha * opacity));
    }
    final float x0, x1, y0, y1;
    switch(gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
        case Gravity.LEFT:
            x0 = 1;
            x1 = 0;
            break;
        case Gravity.RIGHT:
            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;
    }
    paintDrawable.setShaderFactory(new ShapeDrawable.ShaderFactory() {

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

Example 80 with LinearGradient

use of android.graphics.LinearGradient in project mobile-android by photo.

the class Wheel method makeBitmapIndicator.

/**
	 * Make bitmap indicator.
	 * 
	 * @param width
	 *           the width
	 * @param height
	 *           the height
	 * @return the bitmap
	 */
private static Bitmap makeBitmapIndicator(int width, int height) {
    float ellipse = width / 2;
    float h = (float) height;
    float y = (h + 10.0f) / 10.0f;
    float y2 = y * 2.5f;
    Bitmap bm = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bm);
    Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
    p.setDither(true);
    p.setColor(0xFF666666);
    RectF rect = new RectF(0, y, width, height - y2);
    c.drawRoundRect(rect, ellipse, ellipse, p);
    p.setColor(0xFFFFFFFF);
    rect = new RectF(0, y2, width, height - y);
    c.drawRoundRect(rect, ellipse, ellipse, p);
    rect = new RectF(0, y + 2, width, height - (y + 2));
    int[] colors = { 0xFF0076E7, 0xFF00BBFF, 0xFF0076E7 };
    float[] positions = { 0f, 0.5f, 1f };
    LinearGradient gradient = new LinearGradient(0, 0, width, 0, colors, positions, TileMode.REPEAT);
    p.setShader(gradient);
    c.drawRoundRect(rect, ellipse, ellipse, p);
    return bm;
}