1 files changed, 137 insertions, 0 deletions
diff --git a/libs/hwui/AssetAtlas.cpp b/libs/hwui/AssetAtlas.cpp
new file mode 100644
index 0000000..782c052
--- /dev/null
+++ b/libs/hwui/AssetAtlas.cpp
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2013 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 "AssetAtlas.h"
+#include "Caches.h"
+
+#include <GLES2/gl2ext.h>
+
+namespace android {
+namespace uirenderer {
+
+///////////////////////////////////////////////////////////////////////////////
+// Lifecycle
+///////////////////////////////////////////////////////////////////////////////
+
+void AssetAtlas::init(sp<GraphicBuffer> buffer, int* map, int count) {
+    if (mImage) {
+        return;
+    }
+
+    mImage = new Image(buffer);
+
+    if (mImage->getTexture()) {
+        Caches& caches = Caches::getInstance();
+
+        mTexture = new Texture(caches);
+        mTexture->id = mImage->getTexture();
+        mTexture->width = buffer->getWidth();
+        mTexture->height = buffer->getHeight();
+
+        createEntries(caches, map, count);
+    } else {
+        ALOGW("Could not create atlas image");
+
+        delete mImage;
+        mImage = NULL;
+        mTexture = NULL;
+    }
+}
+
+void AssetAtlas::terminate() {
+    if (mImage) {
+        delete mImage;
+        mImage = NULL;
+
+        delete mTexture;
+        mTexture = NULL;
+
+        for (size_t i = 0; i < mEntries.size(); i++) {
+            delete mEntries.valueAt(i);
+        }
+        mEntries.clear();
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Entries
+///////////////////////////////////////////////////////////////////////////////
+
+AssetAtlas::Entry* AssetAtlas::getEntry(SkBitmap* const bitmap) const {
+    ssize_t index = mEntries.indexOfKey(bitmap);
+    return index >= 0 ? mEntries.valueAt(index) : NULL;
+}
+
+Texture* AssetAtlas::getEntryTexture(SkBitmap* const bitmap) const {
+    ssize_t index = mEntries.indexOfKey(bitmap);
+    return index >= 0 ? mEntries.valueAt(index)->texture : NULL;
+}
+
+/**
+ * Delegates changes to wrapping and filtering to the base atlas texture
+ * instead of applying the changes to the virtual textures.
+ */
+struct DelegateTexture: public Texture {
+    DelegateTexture(Caches& caches, Texture* delegate): Texture(caches), mDelegate(delegate) { }
+
+    virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false,
+            bool force = false, GLenum renderTarget = GL_TEXTURE_2D) {
+        mDelegate->setWrapST(wrapS, wrapT, bindTexture, force, renderTarget);
+    }
+
+    virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false,
+            bool force = false, GLenum renderTarget = GL_TEXTURE_2D) {
+        mDelegate->setFilterMinMag(min, mag, bindTexture, force, renderTarget);
+    }
+private:
+    Texture* const mDelegate;
+}; // struct DelegateTexture
+
+/**
+ * TODO: This method does not take the rotation flag into account
+ */
+void AssetAtlas::createEntries(Caches& caches, int* map, int count) {
+    const float width = float(mTexture->width);
+    const float height = float(mTexture->height);
+
+    for (int i = 0; i < count; ) {
+        SkBitmap* bitmap = (SkBitmap*) map[i++];
+        int x = map[i++];
+        int y = map[i++];
+        bool rotated = map[i++] > 0;
+
+        // Bitmaps should never be null, we're just extra paranoid
+        if (!bitmap) continue;
+
+        const UvMapper mapper(
+                x / width, (x + bitmap->width()) / width,
+                y / height, (y + bitmap->height()) / height);
+
+        Texture* texture = new DelegateTexture(caches, mTexture);
+        Entry* entry = new Entry(bitmap, x, y, rotated, texture, mapper, *this);
+
+        texture->id = mTexture->id;
+        texture->blend = !bitmap->isOpaque();
+        texture->width = bitmap->width();
+        texture->height = bitmap->height();
+        texture->uvMapper = &entry->uvMapper;
+
+        mEntries.add(entry->bitmap, entry);
+    }
+}
+
+}; // namespace uirenderer
+}; // namespace android