Use a single stencil buffer for a given width,height,samplecount

Review URL: http://codereview.appspot.com/4854044/


git-svn-id: http://skia.googlecode.com/svn/trunk@2061 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 26 insertions, 0 deletions

diff --git a/gpu/src/GrStencilBuffer.cpp b/gpu/src/GrStencilBuffer.cpp
new file mode 100644
index 0000000000..d004612d14
--- /dev/null
+++ b/gpu/src/GrStencilBuffer.cpp
@@ -0,0 +1,26 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrStencilBuffer.h"
+
+#include "GrContext.h"
+#include "GrGpu.h"
+
+void GrStencilBuffer::wasDetachedFromRenderTarget(const GrRenderTarget* rt) {
+    GrAssert(fRTAttachmentCnt > 0);
+    if (0 == --fRTAttachmentCnt && NULL != fCacheEntry) {
+        this->getGpu()->getContext()->unlockStencilBuffer(fCacheEntry);
+        // At this point we could be deleted!
+    }
+}
+
+void GrStencilBuffer::transferToCacheAndLock() {
+    GrAssert(NULL == fCacheEntry);
+    fCacheEntry = 
+        this->getGpu()->getContext()->addAndLockStencilBuffer(this);
+}