1 files changed, 105 insertions, 0 deletions
diff --git a/libs/hwui/PatchCache.cpp b/libs/hwui/PatchCache.cpp
new file mode 100644
index 0000000..71bab91
--- /dev/null
+++ b/libs/hwui/PatchCache.cpp
@@ -0,0 +1,105 @@
+/*
+ * 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 <utils/Log.h>
+
+#include "PatchCache.h"
+#include "Properties.h"
+
+namespace android {
+namespace uirenderer {
+
+///////////////////////////////////////////////////////////////////////////////
+// Constructors/destructor
+///////////////////////////////////////////////////////////////////////////////
+
+PatchCache::PatchCache(): mMaxEntries(DEFAULT_PATCH_CACHE_SIZE) {
+}
+
+PatchCache::PatchCache(uint32_t maxEntries): mMaxEntries(maxEntries) {
+}
+
+PatchCache::~PatchCache() {
+    clear();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Caching
+///////////////////////////////////////////////////////////////////////////////
+
+void PatchCache::clear() {
+    size_t count = mCache.size();
+    for (size_t i = 0; i < count; i++) {
+        delete mCache.valueAt(i);
+    }
+    mCache.clear();
+}
+
+Patch* PatchCache::get(const float bitmapWidth, const float bitmapHeight,
+        const float pixelWidth, const float pixelHeight,
+        const int32_t* xDivs, const int32_t* yDivs, const uint32_t* colors,
+        const uint32_t width, const uint32_t height, const int8_t numColors) {
+
+    int8_t transparentQuads = 0;
+    uint32_t colorKey = 0;
+
+    if (uint8_t(numColors) < sizeof(uint32_t) * 4) {
+        for (int8_t i = 0; i < numColors; i++) {
+            if (colors[i] == 0x0) {
+                transparentQuads++;
+                colorKey |= 0x1 << i;
+            }
+        }
+    }
+
+    // If the 9patch is made of only transparent quads
+    if (transparentQuads == int8_t((width + 1) * (height + 1))) {
+        return NULL;
+    }
+
+    const PatchDescription description(bitmapWidth, bitmapHeight,
+            pixelWidth, pixelHeight, width, height, transparentQuads, colorKey);
+
+    ssize_t index = mCache.indexOfKey(description);
+    Patch* mesh = NULL;
+    if (index >= 0) {
+        mesh = mCache.valueAt(index);
+    }
+
+    if (!mesh) {
+        PATCH_LOGD("New patch mesh "
+                "xCount=%d yCount=%d, w=%.2f h=%.2f, bw=%.2f bh=%.2f",
+                width, height, pixelWidth, pixelHeight, bitmapWidth, bitmapHeight);
+
+        mesh = new Patch(width, height, transparentQuads);
+        mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f,
+                pixelWidth, pixelHeight, xDivs, yDivs, width, height, colorKey);
+
+        if (mCache.size() >= mMaxEntries) {
+            delete mCache.valueAt(mCache.size() - 1);
+            mCache.removeItemsAt(mCache.size() - 1, 1);
+        }
+
+        mCache.add(description, mesh);
+    }
+
+    return mesh;
+}
+
+}; // namespace uirenderer
+}; // namespace android