Add a way to query GL extensions.
Change-Id: Ic27dbf72289dacf641b640a749fbd40c12cd474f
diff --git a/libs/hwui/Extensions.h b/libs/hwui/Extensions.h
new file mode 100644
index 0000000..c3d2448
--- /dev/null
+++ b/libs/hwui/Extensions.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#define LOG_TAG "OpenGLRenderer"
+
+#ifndef ANDROID_UI_EXTENSIONS_H
+#define ANDROID_UI_EXTENSIONS_H
+
+#include <utils/SortedVector.h>
+#include <utils/String8.h>
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+namespace android {
+namespace uirenderer {
+
+class Extensions {
+public:
+ Extensions() {
+ const char* buffer = (const char*) glGetString(GL_EXTENSIONS);
+ const char* current = buffer;
+ const char* head = current;
+ do {
+ head = strchr(current, ' ');
+ String8 s(current, head ? head - current : strlen(current));
+ if (s.length()) {
+ mExtensionList.add(s);
+ }
+ current = head + 1;
+ } while (head);
+
+ mHasNPot = hasExtension("GL_OES_texture_npot");
+ }
+
+ inline bool hasNPot() const { return mHasNPot; }
+
+ bool hasExtension(const char* extension) const {
+ const String8 s(extension);
+ return mExtensionList.indexOf(s) >= 0;
+ }
+
+private:
+ SortedVector<String8> mExtensionList;
+
+ bool mHasNPot;
+}; // class Extensions
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_UI_EXTENSIONS_H