| /* |
| * 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 LinearGradient extends Shader { |
| |
| /** Create a shader that draws a linear gradient along a line. |
| @param x0 The x-coordinate for the start of the gradient line |
| @param y0 The y-coordinate for the start of the gradient line |
| @param x1 The x-coordinate for the end of the gradient line |
| @param y1 The y-coordinate for the end of the gradient line |
| @param colors The colors to be distributed along the gradient line |
| @param positions May be null. The relative positions [0..1] of |
| each corresponding color in the colors array. If this is null, |
| the the colors are distributed evenly along the gradient line. |
| @param tile The Shader tiling mode |
| */ |
| public LinearGradient(float x0, float y0, float x1, float y1, |
| int colors[], float positions[], TileMode tile) { |
| 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(x0, y0, x1, y1, colors, positions, tile.nativeInt); |
| } |
| |
| /** Create a shader that draws a linear gradient along a line. |
| @param x0 The x-coordinate for the start of the gradient line |
| @param y0 The y-coordinate for the start of the gradient line |
| @param x1 The x-coordinate for the end of the gradient line |
| @param y1 The y-coordinate for the end of the gradient line |
| @param color0 The color at the start of the gradient line. |
| @param color1 The color at the end of the gradient line. |
| @param tile The Shader tiling mode |
| */ |
| public LinearGradient(float x0, float y0, float x1, float y1, |
| int color0, int color1, TileMode tile) { |
| native_instance = nativeCreate2(x0, y0, x1, y1, color0, color1, tile.nativeInt); |
| } |
| |
| |
| private static native int nativeCreate1(float x0, float y0, float x1, float y1, |
| int colors[], float positions[], int tileMode); |
| private static native int nativeCreate2(float x0, float y0, float x1, float y1, |
| int color0, int color1, int tileMode); |
| } |
| |