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Diffstat (limited to 'graphics/java/android/graphics/Shader.java')
-rw-r--r-- | graphics/java/android/graphics/Shader.java | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/graphics/java/android/graphics/Shader.java b/graphics/java/android/graphics/Shader.java new file mode 100644 index 0000000..ae0304e --- /dev/null +++ b/graphics/java/android/graphics/Shader.java @@ -0,0 +1,80 @@ +/* + * 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 + /* package */ int native_instance; + + 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) { + return nativeGetLocalMatrix(native_instance, localM.native_instance); + } + + /** + * 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) { + nativeSetLocalMatrix(native_instance, + localM != null ? localM.native_instance : 0); + } + + protected void finalize() throws Throwable { + nativeDestructor(native_instance); + } + + private static native void nativeDestructor(int native_shader); + private static native boolean nativeGetLocalMatrix(int native_shader, + int matrix_instance); + private static native void nativeSetLocalMatrix(int native_shader, + int matrix_instance); +} |