[RenderScript] Add docs advising users about dstAtop bug for support …

…lib. Bug: 22047392 Change-Id: I5264e39804ebafd53291c5b1ad5513ffff422942 (cherry picked from commit a706ff0)
aosp-mirror · Jul 20, 2015 · 086772f · 086772f
1 parent c956633
commit 086772f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/v8/renderscript/java/src/android/support/v8/renderscript/ScriptIntrinsicBlend.java b/v8/renderscript/java/src/android/support/v8/renderscript/ScriptIntrinsicBlend.java
@@ -258,6 +258,8 @@ public Script.KernelID getKernelIDSrcAtop() {
     /**
      * dst = dst.rgb * src.a + (1.0 - dst.a) * src.rgb
      * dst.a = src.a
+     * Note: Before API 23, the alpha channel was not correctly set.
+     *       Please use with caution when targeting older APIs.
      *
      * @param ain The source buffer
      * @param aout The destination buffer