Initial Contribution

1 files changed, 51 insertions, 0 deletions

diff --git a/graphics/java/android/graphics/ComposeShader.java b/graphics/java/android/graphics/ComposeShader.java
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+++ b/graphics/java/android/graphics/ComposeShader.java
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+/*
+ * 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;
+
+/** A subclass of shader that returns the coposition of two other shaders, combined by
+    an {@link android.graphics.Xfermode} subclass.
+*/
+public class ComposeShader extends Shader {
+    /** Create a new compose shader, given shaders A, B, and a combining mode.
+        When the mode is applied, it will be given the result from shader A as its
+        "dst", and the result of from shader B as its "src".
+        @param shaderA  The colors from this shader are seen as the "dst" by the mode
+        @param shaderB  The colors from this shader are seen as the "src" by the mode
+        @param mode     The mode that combines the colors from the two shaders. If mode
+                        is null, then SRC_OVER is assumed.
+    */
+    public ComposeShader(Shader shaderA, Shader shaderB, Xfermode mode) {
+        native_instance = nativeCreate1(shaderA.native_instance, shaderB.native_instance,
+                                        (mode != null) ? mode.native_instance : 0);
+    }
+
+    /** Create a new compose shader, given shaders A, B, and a combining PorterDuff mode.
+        When the mode is applied, it will be given the result from shader A as its
+        "dst", and the result of from shader B as its "src".
+        @param shaderA  The colors from this shader are seen as the "dst" by the mode
+        @param shaderB  The colors from this shader are seen as the "src" by the mode
+        @param mode     The PorterDuff mode that combines the colors from the two shaders.
+    */
+    public ComposeShader(Shader shaderA, Shader shaderB, PorterDuff.Mode mode) {
+        native_instance = nativeCreate2(shaderA.native_instance, shaderB.native_instance,
+                                        mode.nativeInt);
+    }
+
+    private static native int nativeCreate1(int native_shaderA, int native_shaderB, int native_mode);
+    private static native int nativeCreate2(int native_shaderA, int native_shaderB, int porterDuffMode);
+}
+