| /* |
| * Copyright (C) 2006 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; |
| |
| /** |
| * Shader is the based class for objects that return horizontal spans of colors |
| * during drawing. A subclass of Shader is installed in a Paint calling |
| * paint.setShader(shader). After that any object (other than a bitmap) that is |
| * drawn with that paint will get its color(s) from the shader. |
| */ |
| public class Shader { |
| /** |
| * This is set by subclasses, but don't make it public. |
| * |
| * @hide |
| */ |
| public int native_instance; |
| /** |
| * @hide |
| */ |
| public int native_shader; |
| |
| private Matrix mLocalMatrix; |
| |
| public enum TileMode { |
| /** |
| * replicate the edge color if the shader draws outside of its |
| * original bounds |
| */ |
| CLAMP (0), |
| /** |
| * repeat the shader's image horizontally and vertically |
| */ |
| REPEAT (1), |
| /** |
| * repeat the shader's image horizontally and vertically, alternating |
| * mirror images so that adjacent images always seam |
| */ |
| MIRROR (2); |
| |
| TileMode(int nativeInt) { |
| this.nativeInt = nativeInt; |
| } |
| final int nativeInt; |
| } |
| |
| /** |
| * Return true if the shader has a non-identity local matrix. |
| * @param localM If not null, it is set to the shader's local matrix. |
| * @return true if the shader has a non-identity local matrix |
| */ |
| public boolean getLocalMatrix(Matrix localM) { |
| if (mLocalMatrix != null) { |
| localM.set(mLocalMatrix); |
| return !mLocalMatrix.isIdentity(); |
| } |
| return false; |
| } |
| |
| /** |
| * Set the shader's local matrix. Passing null will reset the shader's |
| * matrix to identity |
| * @param localM The shader's new local matrix, or null to specify identity |
| */ |
| public void setLocalMatrix(Matrix localM) { |
| mLocalMatrix = localM; |
| nativeSetLocalMatrix(native_instance, native_shader, |
| localM == null ? 0 : localM.native_instance); |
| } |
| |
| protected void finalize() throws Throwable { |
| try { |
| super.finalize(); |
| } finally { |
| nativeDestructor(native_instance, native_shader); |
| } |
| } |
| |
| private static native void nativeDestructor(int native_shader, int native_skiaShader); |
| private static native void nativeSetLocalMatrix(int native_shader, |
| int native_skiaShader, int matrix_instance); |
| } |