Add dithering to gradients
Change-Id: Ic1208855bde3a254eca2fd7cef43e0f1318ce419
diff --git a/libs/hwui/Dither.h b/libs/hwui/Dither.h
new file mode 100755
index 0000000..34cf9bf
--- /dev/null
+++ b/libs/hwui/Dither.h
@@ -0,0 +1,47 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_HWUI_DITHER_H
+#define ANDROID_HWUI_DITHER_H
+
+#include <GLES2/gl2.h>
+
+#include "Program.h"
+
+namespace android {
+namespace uirenderer {
+
+/**
+ * Handles dithering for programs.
+ */
+class Dither {
+public:
+ Dither(): mInitialized(false), mDitherTexture(0) { }
+
+ void clear();
+ void setupProgram(Program* program, GLuint* textureUnit);
+
+private:
+ void bindDitherTexture();
+
+ bool mInitialized;
+ GLuint mDitherTexture;
+};
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_HWUI_DITHER_H