1 files changed, 86 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/ProtoBufUtils.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/ProtoBufUtils.java
new file mode 100644
index 000000000..074e4409e
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/ProtoBufUtils.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+package com.android.ide.eclipse.gltrace;
+
+import com.android.ide.eclipse.gltrace.GLProtoBuf.GLMessage;
+
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.PaletteData;
+import org.eclipse.swt.widgets.Display;
+import org.liblzf.CLZF;
+
+/** Utilities to deal with protobuf encoded {@link GLMessage}. */
+public class ProtoBufUtils {
+    private static ImageData getImageData(GLMessage glMsg) {
+        int width = glMsg.getFb().getWidth();
+        int height = glMsg.getFb().getHeight();
+
+        if (width * height == 0) {
+            return null;
+        }
+
+        byte[] compressed = glMsg.getFb().getContents(0).toByteArray();
+        byte[] uncompressed = new byte[width * height * 4];
+
+        int size = CLZF.lzf_decompress(compressed, compressed.length,
+                                uncompressed, uncompressed.length);
+        assert size == width * height * 4 : "Unexpected image size after decompression.";
+
+        int redMask   = 0xff000000;
+        int greenMask = 0x00ff0000;
+        int blueMask  = 0x0000ff00;
+        PaletteData palette = new PaletteData(redMask, greenMask, blueMask);
+        ImageData imageData = new ImageData(
+                width,
+                height,
+                32,         // depth
+                palette,
+                1,          // scan line padding
+                uncompressed);
+        byte[] alpha = new byte[width*height];
+        for (int i = 0; i < width * height; i++) {
+            alpha[i] = uncompressed[i * 4 + 3];
+        }
+        imageData.alphaData = alpha;
+
+        imageData = imageData.scaledTo(imageData.width, -imageData.height);
+        return imageData;
+    }
+
+    /** Obtains the image stored in provided protocol buffer message. */
+    public static Image getImage(Display display, GLMessage glMsg) {
+        if (!glMsg.hasFb()) {
+            return null;
+        }
+
+        ImageData imageData = null;
+        try {
+            imageData = getImageData(glMsg);
+        } catch (Exception e) {
+            GlTracePlugin.getDefault().logMessage(
+                    "Unexpected error while retrieving framebuffer image: " + e);
+            return null;
+        }
+
+        if (imageData == null) {
+            return null;
+        }
+
+        return new Image(display, imageData);
+    }
+}