Move scissor state to RenderState
Change-Id: I1227a3886fb24e4d9fad79fca469794f06cfb15e
diff --git a/libs/hwui/renderstate/Scissor.cpp b/libs/hwui/renderstate/Scissor.cpp
new file mode 100644
index 0000000..ede57be
--- /dev/null
+++ b/libs/hwui/renderstate/Scissor.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2015 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 "Scissor.h"
+
+namespace android {
+namespace uirenderer {
+
+Scissor::Scissor()
+ : mEnabled(false)
+ , mScissorX(0)
+ , mScissorY(0)
+ , mScissorWidth(0)
+ , mScissorHeight(0) {
+}
+
+bool Scissor::setEnabled(bool enabled) {
+ if (mEnabled != enabled) {
+ if (enabled) {
+ glEnable(GL_SCISSOR_TEST);
+ } else {
+ glDisable(GL_SCISSOR_TEST);
+ }
+ mEnabled = enabled;
+ return true;
+ }
+ return false;
+}
+
+bool Scissor::set(GLint x, GLint y, GLint width, GLint height) {
+ if (mEnabled && (x != mScissorX || y != mScissorY
+ || width != mScissorWidth || height != mScissorHeight)) {
+
+ if (x < 0) {
+ width += x;
+ x = 0;
+ }
+ if (y < 0) {
+ height += y;
+ y = 0;
+ }
+ if (width < 0) {
+ width = 0;
+ }
+ if (height < 0) {
+ height = 0;
+ }
+ glScissor(x, y, width, height);
+
+ mScissorX = x;
+ mScissorY = y;
+ mScissorWidth = width;
+ mScissorHeight = height;
+
+ return true;
+ }
+ return false;
+}
+
+void Scissor::reset() {
+ mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0;
+}
+
+void Scissor::invalidate() {
+ mEnabled = glIsEnabled(GL_SCISSOR_TEST);
+ setEnabled(true);
+ reset();
+}
+
+} /* namespace uirenderer */
+} /* namespace android */
+