Revert "Revert "Add more support for transformed clip rects and paths""
This reverts commit a8557d2169e14997637f57bc897640c8882d4a46.
Change-Id: I36d4883d548fc47ba6c0b4a42012107d0d2f85a6
diff --git a/libs/hwui/Stencil.cpp b/libs/hwui/Stencil.cpp
new file mode 100644
index 0000000..9d2c86f
--- /dev/null
+++ b/libs/hwui/Stencil.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#include <GLES2/gl2.h>
+
+#include "Properties.h"
+#include "Stencil.h"
+
+namespace android {
+namespace uirenderer {
+
+Stencil::Stencil(): mState(kDisabled) {
+}
+
+uint32_t Stencil::getStencilSize() {
+ return STENCIL_BUFFER_SIZE;
+}
+
+void Stencil::clear() {
+ glClearStencil(0);
+ glClear(GL_STENCIL_BUFFER_BIT);
+}
+
+void Stencil::enableTest() {
+ if (mState != kTest) {
+ enable();
+ glStencilFunc(GL_LESS, 0x0, 0x1);
+ // We only want to test, let's keep everything
+ glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+ mState = kTest;
+ }
+}
+
+void Stencil::enableWrite() {
+ if (mState != kWrite) {
+ enable();
+ glStencilFunc(GL_ALWAYS, 0x1, 0x1);
+ // The test always passes so the first two values are meaningless
+ glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+ mState = kWrite;
+ }
+}
+
+void Stencil::enable() {
+ if (!mState == kDisabled) {
+ glEnable(GL_STENCIL_TEST);
+ }
+}
+
+void Stencil::disable() {
+ if (mState != kDisabled) {
+ glDisable(GL_STENCIL_TEST);
+ mState = kDisabled;
+ }
+}
+
+}; // namespace uirenderer
+}; // namespace android