1 files changed, 91 insertions, 0 deletions
diff --git a/libs/hwui/FboCache.cpp b/libs/hwui/FboCache.cpp
new file mode 100644
index 0000000..2ef71c2
--- /dev/null
+++ b/libs/hwui/FboCache.cpp
@@ -0,0 +1,91 @@
+/*
+ * 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"
+
+#include <stdlib.h>
+
+#include "FboCache.h"
+#include "Properties.h"
+
+namespace android {
+namespace uirenderer {
+
+///////////////////////////////////////////////////////////////////////////////
+// Constructors/destructor
+///////////////////////////////////////////////////////////////////////////////
+
+FboCache::FboCache(): mMaxSize(DEFAULT_FBO_CACHE_SIZE) {
+    char property[PROPERTY_VALUE_MAX];
+    if (property_get(PROPERTY_FBO_CACHE_SIZE, property, NULL) > 0) {
+        LOGD("  Setting fbo cache size to %s", property);
+        mMaxSize = atoi(property);
+    } else {
+        LOGD("  Using default fbo cache size of %d", DEFAULT_FBO_CACHE_SIZE);
+    }
+}
+
+FboCache::~FboCache() {
+    clear();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Size management
+///////////////////////////////////////////////////////////////////////////////
+
+uint32_t FboCache::getSize() {
+    return mCache.size();
+}
+
+uint32_t FboCache::getMaxSize() {
+    return mMaxSize;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Caching
+///////////////////////////////////////////////////////////////////////////////
+
+void FboCache::clear() {
+    for (size_t i = 0; i < mCache.size(); i++) {
+        const GLuint fbo = mCache.itemAt(i);
+        glDeleteFramebuffers(1, &fbo);
+    }
+    mCache.clear();
+}
+
+GLuint FboCache::get() {
+    GLuint fbo;
+    if (mCache.size() > 0) {
+        fbo = mCache.itemAt(mCache.size() - 1);
+        mCache.removeAt(mCache.size() - 1);
+    } else {
+        glGenFramebuffers(1, &fbo);
+    }
+    return fbo;
+}
+
+bool FboCache::put(GLuint fbo) {
+    if (mCache.size() < mMaxSize) {
+        mCache.add(fbo);
+        return true;
+    }
+
+    glDeleteFramebuffers(1, &fbo);
+    return false;
+}
+
+}; // namespace uirenderer
+}; // namespace android