70 lines
3.0 KiB
Java
70 lines
3.0 KiB
Java
/*
|
|
* 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);
|
|
}
|
|
|