Bug 679226 - Fold widget/src into widget. r=roc

widget/android/AndroidDirectTexture.cpp

@@ -0,0 +1,149 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Corporation code.
+ *
+ * The Initial Developer of the Original Code is Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2009
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   James Willcox <jwillcox@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "AndroidDirectTexture.h"
+
+typedef gfxASurface::gfxImageFormat gfxImageFormat;
+
+namespace mozilla {
+
+AndroidDirectTexture::AndroidDirectTexture(PRUint32 width, PRUint32 height, PRUint32 usage,
+                                           gfxImageFormat format) :
+    mLock("AndroidDirectTexture.mLock")
+  , mNeedFlip(false)
+  , mWidth(width)
+  , mHeight(height)
+  , mFormat(format)
+  , mPendingReallocBuffer(NULL)
+{
+  mFrontBuffer = new AndroidGraphicBuffer(width, height, usage, format);
+  mBackBuffer = new AndroidGraphicBuffer(width, height, usage, format);
+}
+
+AndroidDirectTexture::~AndroidDirectTexture()
+{
+  if (mFrontBuffer) {
+    delete mFrontBuffer;
+    mFrontBuffer = NULL;
+  }
+
+  if (mBackBuffer) {
+    delete mBackBuffer;
+    mBackBuffer = NULL;
+  }
+}
+
+void
+AndroidDirectTexture::ReallocPendingBuffer()
+{
+  // We may have reallocated while the current back buffer was being
+  // used as the front buffer. If we have such a reallocation pending
+  // and the current back buffer is the target buffer, do it now.
+  //
+  // It is assumed that mLock is already acquired
+  if (mPendingReallocBuffer == mBackBuffer) {
+    mBackBuffer->Reallocate(mWidth, mHeight, mFormat);
+    mPendingReallocBuffer = NULL;
+  }
+}
+
+bool
+AndroidDirectTexture::Lock(PRUint32 aUsage, unsigned char **bits)
+{
+  mLock.Lock();
+  ReallocPendingBuffer();
+  return mBackBuffer->Lock(aUsage, bits);
+}
+
+bool
+AndroidDirectTexture::Lock(PRUint32 aUsage, const nsIntRect& aRect, unsigned char **bits)
+{
+  mLock.Lock();
+  ReallocPendingBuffer();
+  return mBackBuffer->Lock(aUsage, aRect, bits);
+}
+
+bool
+AndroidDirectTexture::Unlock(bool aFlip)
+{
+  if (aFlip) {
+    mNeedFlip = true;
+  }
+
+  bool result = mBackBuffer->Unlock();
+  mLock.Unlock();
+
+  return result;
+}
+
+bool
+AndroidDirectTexture::Reallocate(PRUint32 aWidth, PRUint32 aHeight) {
+  return Reallocate(aWidth, aHeight, mFormat);
+}
+
+bool
+AndroidDirectTexture::Reallocate(PRUint32 aWidth, PRUint32 aHeight, gfxASurface::gfxImageFormat aFormat)
+{
+  MutexAutoLock lock(mLock);
+
+  // We only reallocate the current back buffer. The front buffer is likely
+  // in use, so we'll reallocate it on the first Lock() after it is rotated
+  // to the back.
+  bool result = mBackBuffer->Reallocate(aWidth, aHeight, aFormat);
+  if (result) {
+    mPendingReallocBuffer = mFrontBuffer;
+  }
+
+  return result;
+}
+
+bool
+AndroidDirectTexture::Bind()
+{
+  MutexAutoLock lock(mLock);
+
+  if (mNeedFlip) {
+    AndroidGraphicBuffer* tmp = mBackBuffer;
+    mBackBuffer = mFrontBuffer;
+    mFrontBuffer = tmp;
+    mNeedFlip = false;
+  }
+
+  return mFrontBuffer->Bind();
+}
+
+} /* mozilla */