| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.graphics; |
| |
| public class SweepGradient extends Shader { |
| |
| /** |
| * A subclass of Shader that draws a sweep gradient around a center point. |
| * |
| * @param cx The x-coordinate of the center |
| * @param cy The y-coordinate of the center |
| * @param colors The colors to be distributed between around the center. |
| * There must be at least 2 colors in the array. |
| * @param positions May be NULL. The relative position of |
| * each corresponding color in the colors array, beginning |
| * with 0 and ending with 1.0. If the values are not |
| * monotonic, the drawing may produce unexpected results. |
| * If positions is NULL, then the colors are automatically |
| * spaced evenly. |
| */ |
| public SweepGradient(float cx, float cy, |
| int colors[], float positions[]) { |
| if (colors.length < 2) { |
| throw new IllegalArgumentException("needs >= 2 number of colors"); |
| } |
| if (positions != null && colors.length != positions.length) { |
| throw new IllegalArgumentException( |
| "color and position arrays must be of equal length"); |
| } |
| native_instance = nativeCreate1(cx, cy, colors, positions); |
| native_shader = nativePostCreate1(native_instance, cx, cy, colors, positions); |
| } |
| |
| /** |
| * A subclass of Shader that draws a sweep gradient around a center point. |
| * |
| * @param cx The x-coordinate of the center |
| * @param cy The y-coordinate of the center |
| * @param color0 The color to use at the start of the sweep |
| * @param color1 The color to use at the end of the sweep |
| */ |
| public SweepGradient(float cx, float cy, int color0, int color1) { |
| native_instance = nativeCreate2(cx, cy, color0, color1); |
| native_shader = nativePostCreate2(native_instance, cx, cy, color0, color1); |
| } |
| |
| private static native int nativeCreate1(float x, float y, int colors[], float positions[]); |
| private static native int nativeCreate2(float x, float y, int color0, int color1); |
| |
| private static native int nativePostCreate1(int native_shader, float cx, float cy, |
| int[] colors, float[] positions); |
| private static native int nativePostCreate2(int native_shader, float cx, float cy, |
| int color0, int color1); |
| } |
| |