1 files changed, 121 insertions, 0 deletions
diff --git a/libs/hwui/AssetAtlas.cpp b/libs/hwui/AssetAtlas.cpp
new file mode 100644
index 0000000..cf8cc97
--- /dev/null
+++ b/libs/hwui/AssetAtlas.cpp
@@ -0,0 +1,121 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "OpenGLRenderer"
+
+#include "AssetAtlas.h"
+
+#include <GLES2/gl2ext.h>
+
+#include <utils/Log.h>
+
+namespace android {
+namespace uirenderer {
+
+///////////////////////////////////////////////////////////////////////////////
+// Lifecycle
+///////////////////////////////////////////////////////////////////////////////
+
+void AssetAtlas::init(sp<GraphicBuffer> buffer, int* map, int count) {
+    if (mImage != EGL_NO_IMAGE_KHR) {
+        return;
+    }
+
+    // Create the EGLImage object that maps the GraphicBuffer
+    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    EGLClientBuffer clientBuffer = (EGLClientBuffer) buffer->getNativeBuffer();
+    EGLint attrs[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE };
+
+    mImage = eglCreateImageKHR(display, EGL_NO_CONTEXT,
+            EGL_NATIVE_BUFFER_ANDROID, clientBuffer, attrs);
+
+    if (mImage == EGL_NO_IMAGE_KHR) {
+        ALOGW("Error creating atlas image (%#x)", eglGetError());
+        return;
+    }
+
+    // Create a 2D texture to sample from the EGLImage
+    glGenTextures(1, &mTexture);
+    glBindTexture(GL_TEXTURE_2D, mTexture);
+    glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, mImage);
+
+    mWidth = buffer->getWidth();
+    mHeight = buffer->getHeight();
+
+    createEntries(map, count);
+}
+
+void AssetAtlas::terminate() {
+    if (mImage != EGL_NO_IMAGE_KHR) {
+        eglDestroyImageKHR(eglGetDisplay(EGL_DEFAULT_DISPLAY), mImage);
+        mImage = EGL_NO_IMAGE_KHR;
+
+        glDeleteTextures(1, &mTexture);
+        mTexture = 0;
+
+        for (size_t i = 0; i < mEntries.size(); i++) {
+            delete mEntries.valueAt(i);
+        }
+        mEntries.clear();
+
+        mWidth = mHeight = 0;
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// 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;
+}
+
+/**
+ * TODO: This method does not take the rotation flag into account
+ */
+void AssetAtlas::createEntries(int* map, int count) {
+    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 / (float) mWidth, (x + bitmap->width()) / (float) mWidth,
+                y / (float) mHeight, (y + bitmap->height()) / (float) mHeight);
+
+        Entry* entry = new Entry(bitmap, x, y, rotated, mapper, *this);
+        entry->texture.id = mTexture;
+        entry->texture.blend = !bitmap->isOpaque();
+        entry->texture.width = bitmap->width();
+        entry->texture.height = bitmap->height();
+        entry->texture.uvMapper = &entry->uvMapper;
+
+        mEntries.add(entry->bitmap, entry);
+    }
+}
+
+}; // namespace uirenderer
+}; // namespace android