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

Example 46 with RadialGradient

use of android.graphics.RadialGradient in project android_frameworks_base by ResurrectionRemix.

the class RectShadowPainter method paintShadow.

public static void paintShadow(Outline viewOutline, float elevation, Canvas canvas) {
    Rect outline = new Rect();
    if (!viewOutline.getRect(outline)) {
        throw new IllegalArgumentException("Outline is not a rect shadow");
    }
    float shadowSize = elevationToShadow(elevation);
    int saved = modifyCanvas(canvas, shadowSize);
    if (saved == -1) {
        return;
    }
    try {
        Paint cornerPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
        cornerPaint.setStyle(Style.FILL);
        Paint edgePaint = new Paint(cornerPaint);
        edgePaint.setAntiAlias(false);
        float radius = viewOutline.getRadius();
        float outerArcRadius = radius + shadowSize;
        int[] colors = { START_COLOR, START_COLOR, END_COLOR };
        cornerPaint.setShader(new RadialGradient(0, 0, outerArcRadius, colors, new float[] { 0f, radius / outerArcRadius, 1f }, TileMode.CLAMP));
        edgePaint.setShader(new LinearGradient(0, 0, -shadowSize, 0, START_COLOR, END_COLOR, TileMode.CLAMP));
        Path path = new Path();
        path.setFillType(FillType.EVEN_ODD);
        // A rectangle bounding the complete shadow.
        RectF shadowRect = new RectF(outline);
        shadowRect.inset(-shadowSize, -shadowSize);
        // A rectangle with edges corresponding to the straight edges of the outline.
        RectF inset = new RectF(outline);
        inset.inset(radius, radius);
        // A rectangle used to represent the edge shadow.
        RectF edgeShadowRect = new RectF();
        // left and right sides.
        edgeShadowRect.set(-shadowSize, 0f, 0f, inset.height());
        // Left shadow
        sideShadow(canvas, edgePaint, edgeShadowRect, outline.left, inset.top, 0);
        // Right shadow
        sideShadow(canvas, edgePaint, edgeShadowRect, outline.right, inset.bottom, 2);
        // Top shadow
        edgeShadowRect.set(-shadowSize, 0, 0, inset.width());
        sideShadow(canvas, edgePaint, edgeShadowRect, inset.right, outline.top, 1);
        // bottom shadow. This needs an inset so that blank doesn't appear when the content is
        // moved up.
        edgeShadowRect.set(-shadowSize, 0, shadowSize / 2f, inset.width());
        edgePaint.setShader(new LinearGradient(edgeShadowRect.right, 0, edgeShadowRect.left, 0, colors, new float[] { 0f, 1 / 3f, 1f }, TileMode.CLAMP));
        sideShadow(canvas, edgePaint, edgeShadowRect, inset.left, outline.bottom, 3);
        // Draw corners.
        drawCorner(canvas, cornerPaint, path, inset.right, inset.bottom, outerArcRadius, 0);
        drawCorner(canvas, cornerPaint, path, inset.left, inset.bottom, outerArcRadius, 1);
        drawCorner(canvas, cornerPaint, path, inset.left, inset.top, outerArcRadius, 2);
        drawCorner(canvas, cornerPaint, path, inset.right, inset.top, outerArcRadius, 3);
    } finally {
        canvas.restoreToCount(saved);
    }
}

Example 47 with RadialGradient

use of android.graphics.RadialGradient in project android_frameworks_base by crdroidandroid.

the class GradientColor method onColorsChange.

private void onColorsChange() {
    int[] tempColors = null;
    float[] tempOffsets = null;
    if (mItemColors != null) {
        int length = mItemColors.length;
        tempColors = new int[length];
        tempOffsets = new float[length];
        for (int i = 0; i < length; i++) {
            tempColors[i] = mItemColors[i];
            tempOffsets[i] = mItemOffsets[i];
        }
    } else {
        if (mHasCenterColor) {
            tempColors = new int[3];
            tempColors[0] = mStartColor;
            tempColors[1] = mCenterColor;
            tempColors[2] = mEndColor;
            tempOffsets = new float[3];
            tempOffsets[0] = 0.0f;
            // Since 0.5f is default value, try to take the one that isn't 0.5f
            tempOffsets[1] = 0.5f;
            tempOffsets[2] = 1f;
        } else {
            tempColors = new int[2];
            tempColors[0] = mStartColor;
            tempColors[1] = mEndColor;
        }
    }
    if (tempColors.length < 2) {
        Log.w(TAG, "<gradient> tag requires 2 color values specified!" + tempColors.length + " " + tempColors);
    }
    if (mGradientType == GradientDrawable.LINEAR_GRADIENT) {
        mShader = new LinearGradient(mStartX, mStartY, mEndX, mEndY, tempColors, tempOffsets, parseTileMode(mTileMode));
    } else {
        if (mGradientType == GradientDrawable.RADIAL_GRADIENT) {
            mShader = new RadialGradient(mCenterX, mCenterY, mGradientRadius, tempColors, tempOffsets, parseTileMode(mTileMode));
        } else {
            mShader = new SweepGradient(mCenterX, mCenterY, tempColors, tempOffsets);
        }
    }
    mDefaultColor = tempColors[0];
}

Example 48 with RadialGradient

use of android.graphics.RadialGradient in project android_frameworks_base by crdroidandroid.

the class GradientDrawable method ensureValidRect.

/**
     * This checks mGradientIsDirty, and if it is true, recomputes both our drawing
     * rectangle (mRect) and the gradient itself, since it depends on our
     * rectangle too.
     * @return true if the resulting rectangle is not empty, false otherwise
     */
private boolean ensureValidRect() {
    if (mGradientIsDirty) {
        mGradientIsDirty = false;
        Rect bounds = getBounds();
        float inset = 0;
        if (mStrokePaint != null) {
            inset = mStrokePaint.getStrokeWidth() * 0.5f;
        }
        final GradientState st = mGradientState;
        mRect.set(bounds.left + inset, bounds.top + inset, bounds.right - inset, bounds.bottom - inset);
        final int[] gradientColors = st.mGradientColors;
        if (gradientColors != null) {
            final RectF r = mRect;
            final float x0, x1, y0, y1;
            if (st.mGradient == LINEAR_GRADIENT) {
                final float level = st.mUseLevel ? getLevel() / 10000.0f : 1.0f;
                switch(st.mOrientation) {
                    case TOP_BOTTOM:
                        x0 = r.left;
                        y0 = r.top;
                        x1 = x0;
                        y1 = level * r.bottom;
                        break;
                    case TR_BL:
                        x0 = r.right;
                        y0 = r.top;
                        x1 = level * r.left;
                        y1 = level * r.bottom;
                        break;
                    case RIGHT_LEFT:
                        x0 = r.right;
                        y0 = r.top;
                        x1 = level * r.left;
                        y1 = y0;
                        break;
                    case BR_TL:
                        x0 = r.right;
                        y0 = r.bottom;
                        x1 = level * r.left;
                        y1 = level * r.top;
                        break;
                    case BOTTOM_TOP:
                        x0 = r.left;
                        y0 = r.bottom;
                        x1 = x0;
                        y1 = level * r.top;
                        break;
                    case BL_TR:
                        x0 = r.left;
                        y0 = r.bottom;
                        x1 = level * r.right;
                        y1 = level * r.top;
                        break;
                    case LEFT_RIGHT:
                        x0 = r.left;
                        y0 = r.top;
                        x1 = level * r.right;
                        y1 = y0;
                        break;
                    default:
                        /* TL_BR */
                        x0 = r.left;
                        y0 = r.top;
                        x1 = level * r.right;
                        y1 = level * r.bottom;
                        break;
                }
                mFillPaint.setShader(new LinearGradient(x0, y0, x1, y1, gradientColors, st.mPositions, Shader.TileMode.CLAMP));
            } else if (st.mGradient == RADIAL_GRADIENT) {
                x0 = r.left + (r.right - r.left) * st.mCenterX;
                y0 = r.top + (r.bottom - r.top) * st.mCenterY;
                float radius = st.mGradientRadius;
                if (st.mGradientRadiusType == RADIUS_TYPE_FRACTION) {
                    // Fall back to parent width or height if intrinsic
                    // size is not specified.
                    final float width = st.mWidth >= 0 ? st.mWidth : r.width();
                    final float height = st.mHeight >= 0 ? st.mHeight : r.height();
                    radius *= Math.min(width, height);
                } else if (st.mGradientRadiusType == RADIUS_TYPE_FRACTION_PARENT) {
                    radius *= Math.min(r.width(), r.height());
                }
                if (st.mUseLevel) {
                    radius *= getLevel() / 10000.0f;
                }
                mGradientRadius = radius;
                if (radius <= 0) {
                    // We can't have a shader with non-positive radius, so
                    // let's have a very, very small radius.
                    radius = 0.001f;
                }
                mFillPaint.setShader(new RadialGradient(x0, y0, radius, gradientColors, null, Shader.TileMode.CLAMP));
            } else if (st.mGradient == SWEEP_GRADIENT) {
                x0 = r.left + (r.right - r.left) * st.mCenterX;
                y0 = r.top + (r.bottom - r.top) * st.mCenterY;
                int[] tempColors = gradientColors;
                float[] tempPositions = null;
                if (st.mUseLevel) {
                    tempColors = st.mTempColors;
                    final int length = gradientColors.length;
                    if (tempColors == null || tempColors.length != length + 1) {
                        tempColors = st.mTempColors = new int[length + 1];
                    }
                    System.arraycopy(gradientColors, 0, tempColors, 0, length);
                    tempColors[length] = gradientColors[length - 1];
                    tempPositions = st.mTempPositions;
                    final float fraction = 1.0f / (length - 1);
                    if (tempPositions == null || tempPositions.length != length + 1) {
                        tempPositions = st.mTempPositions = new float[length + 1];
                    }
                    final float level = getLevel() / 10000.0f;
                    for (int i = 0; i < length; i++) {
                        tempPositions[i] = i * fraction * level;
                    }
                    tempPositions[length] = 1.0f;
                }
                mFillPaint.setShader(new SweepGradient(x0, y0, tempColors, tempPositions));
            }
            // maxed out so that alpha modulation works correctly.
            if (st.mSolidColors == null) {
                mFillPaint.setColor(Color.BLACK);
            }
        }
    }
    return !mRect.isEmpty();
}

Example 49 with RadialGradient

use of android.graphics.RadialGradient in project android_frameworks_base by crdroidandroid.

the class KeyguardUserSwitcherScrim method updatePaint.

private void updatePaint() {
    if (mLayoutWidth == 0) {
        return;
    }
    float radius = mLayoutWidth * OUTER_EXTENT;
    boolean isLtr = getLayoutDirection() == LayoutDirection.LTR;
    mRadialGradientPaint.setShader(new RadialGradient(isLtr ? mLayoutWidth : 0, 0, radius, new int[] { Color.argb((int) (Color.alpha(mDarkColor) * mAlpha / 255f), 0, 0, 0), Color.TRANSPARENT }, new float[] { Math.max(0f, mLayoutWidth * INNER_EXTENT / radius), 1f }, Shader.TileMode.CLAMP));
}