Add stencil buffer to the EGL config

Change-Id: If76c0cd6127534d90f9526b75c0f8e56259c6722

3 files changed, 11 insertions, 0 deletions

diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index cc0e05e..f7d9040 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -127,6 +127,10 @@ OpenGLRenderer::~OpenGLRenderer() {
 // Setup
 ///////////////////////////////////////////////////////////////////////////////
 
+uint32_t OpenGLRenderer::getStencilSize() {
+    return STENCIL_BUFFER_SIZE;
+}
+
 void OpenGLRenderer::setViewport(int width, int height) {
     mOrthoMatrix.loadOrtho(0, width, height, 0, -1, 1);
 
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index ae355bb..d0394af 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -141,6 +141,8 @@ public:
 
     SkPaint* filterPaint(SkPaint* paint);
 
+    ANDROID_API static uint32_t getStencilSize();
+
 protected:
     /**
      * Compose the layer defined in the current snapshot with the layer
diff --git a/libs/hwui/Properties.h b/libs/hwui/Properties.h
index 2eae0f1..71fb8da 100644
--- a/libs/hwui/Properties.h
+++ b/libs/hwui/Properties.h
@@ -37,6 +37,11 @@
 // Textures used by layers must have dimensions multiples of this number
 #define LAYER_SIZE 64
 
+// Defines the size in bits of the stencil buffer
+// Note: We only want 1 bit, but in practice we'll get 8 bits on all GPUs
+//       for the foreseeable future
+#define STENCIL_BUFFER_SIZE 0
+
 /**
  * Debug level for app developers.
  */