Initial import attempt, just to play with. Many things disabled/removed

ui/cc/ManagedTexture.cpp

+/*
+ * Copyright (C) 2010, Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "ManagedTexture.h"
+
+#include "GraphicsContext3D.h"
+#include "cc/CCGraphicsContext.h"
+#include <public/WebGraphicsContext3D.h>
+
+using WebKit::WebGraphicsContext3D;
+
+namespace WebCore {
+
+ManagedTexture::ManagedTexture(TextureManager* manager)
+    : m_textureManager(manager)
+    , m_token(0)
+    , m_format(0)
+    , m_textureId(0)
+{
+    m_textureManager->registerTexture(this);
+}
+
+ManagedTexture::ManagedTexture(TextureManager* manager, TextureToken token, IntSize size, unsigned format, unsigned textureId)
+    : m_textureManager(manager)
+    , m_token(token)
+    , m_size(size)
+    , m_format(format)
+    , m_textureId(textureId)
+{
+    m_textureManager->registerTexture(this);
+}
+
+ManagedTexture::~ManagedTexture()
+{
+    if (!m_textureManager)
+        return;
+    m_textureManager->unregisterTexture(this);
+    if (m_token)
+        m_textureManager->releaseToken(m_token);
+}
+
+void ManagedTexture::setTextureManager(TextureManager* manager)
+{
+    if (manager == m_textureManager)
+        return;
+
+    if (m_textureManager)
+        m_textureManager->unregisterTexture(this);
+    m_textureManager = manager;
+    clear();
+    if (m_textureManager)
+        m_textureManager->registerTexture(this);
+}
+
+bool ManagedTexture::isValid(const IntSize& size, unsigned format)
+{
+    return m_token && size == m_size && format == m_format && m_textureManager && m_textureManager->hasTexture(m_token);
+}
+
+bool ManagedTexture::reserve(const IntSize& size, unsigned format)
+{
+    if (!m_textureManager)
+        return false;
+
+    if (!m_token)
+        m_token = m_textureManager->getToken();
+
+    bool reserved = true;
+    if (size == m_size && format == m_format && m_textureManager->hasTexture(m_token))
+        m_textureManager->protectTexture(m_token);
+    else {
+        m_textureId = 0;
+        reserved = m_textureManager->requestTexture(m_token, size, format);
+        if (reserved) {
+            m_size = size;
+            m_format = format;
+        }
+    }
+
+    return reserved;
+}
+
+void ManagedTexture::unreserve()
+{
+    if (!m_token || !m_textureManager)
+        return;
+
+    m_textureManager->unprotectTexture(m_token);
+}
+
+void ManagedTexture::allocate(TextureAllocator* allocator)
+{
+    ASSERT(m_textureManager->hasTexture(m_token));
+    if (!m_textureId)
+        m_textureId = m_textureManager->allocateTexture(allocator, m_token);
+}
+
+void ManagedTexture::bindTexture(CCGraphicsContext* context, TextureAllocator* allocator)
+{
+    allocate(allocator);
+    WebGraphicsContext3D* context3d = context->context3D();
+    if (!context3d) {
+        // FIXME: Implement this path for software compositing.
+        return;
+    }
+    context3d->bindTexture(GL_TEXTURE_2D, m_textureId);
+}
+
+PassOwnPtr<ManagedTexture> ManagedTexture::steal()
+{
+    OwnPtr<ManagedTexture> texture = adoptPtr(new ManagedTexture(m_textureManager, m_token, m_size, m_format, m_textureId));
+    clear();
+    return texture.release();
+}
+
+void ManagedTexture::clear()
+{
+    m_token = 0;
+    m_size = IntSize();
+    m_format = 0;
+    m_textureId = 0;
+}
+
+}
+
+#endif // USE(ACCELERATED_COMPOSITING)