1 files changed, 167 insertions, 0 deletions
diff --git a/src/plugins/renderers/opengl/renderer/openglvertexarrayobject.cpp b/src/plugins/renderers/opengl/renderer/openglvertexarrayobject.cpp
new file mode 100644
index 000000000..b43815f98
--- /dev/null
+++ b/src/plugins/renderers/opengl/renderer/openglvertexarrayobject.cpp
@@ -0,0 +1,167 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "openglvertexarrayobject_p.h"
+#include <submissioncontext_p.h>
+#include <renderer_p.h>
+#include <glresourcemanagers_p.h>
+#include <Qt3DRender/private/managers_p.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+namespace Render {
+namespace OpenGL {
+
+OpenGLVertexArrayObject::OpenGLVertexArrayObject()
+    : m_ctx(nullptr)
+    , m_specified(false)
+    , m_supportsVao(false)
+{}
+
+void OpenGLVertexArrayObject::bind()
+{
+    Q_ASSERT(m_ctx);
+    if (m_supportsVao) {
+        Q_ASSERT(!m_vao.isNull());
+        Q_ASSERT(m_vao->isCreated());
+        m_vao->bind();
+    } else {
+        // Unbind any other VAO that may have been bound and not released correctly
+        if (m_ctx->m_currentVAO != nullptr && m_ctx->m_currentVAO != this)
+            m_ctx->m_currentVAO->release();
+
+        m_ctx->m_currentVAO = this;
+        // We need to specify array and vertex attributes
+        for (const SubmissionContext::VAOVertexAttribute &attr : qAsConst(m_vertexAttributes))
+            m_ctx->enableAttribute(attr);
+        if (!m_indexAttribute.isNull())
+            m_ctx->bindGLBuffer(m_ctx->m_renderer->glResourceManagers()->glBufferManager()->data(m_indexAttribute),
+                                GLBuffer::IndexBuffer);
+    }
+}
+
+void OpenGLVertexArrayObject::release()
+{
+    Q_ASSERT(m_ctx);
+    if (m_supportsVao) {
+        Q_ASSERT(!m_vao.isNull());
+        Q_ASSERT(m_vao->isCreated());
+        m_vao->release();
+    } else {
+        if (m_ctx->m_currentVAO == this) {
+            for (const SubmissionContext::VAOVertexAttribute &attr : qAsConst(m_vertexAttributes))
+                m_ctx->disableAttribute(attr);
+            m_ctx->m_currentVAO = nullptr;
+        }
+    }
+}
+
+// called from Render thread
+void OpenGLVertexArrayObject::create(SubmissionContext *ctx, const VAOIdentifier &key)
+{
+    QMutexLocker lock(&m_mutex);
+
+    Q_ASSERT(!m_ctx && !m_vao);
+
+    m_ctx = ctx;
+    m_supportsVao = m_ctx->supportsVAO();
+    if (m_supportsVao) {
+        m_vao.reset(new QOpenGLVertexArrayObject());
+        m_vao->create();
+    }
+    m_owners = key;
+}
+
+VAOIdentifier OpenGLVertexArrayObject::key() const
+{
+    return m_owners;
+}
+
+// called from Render thread
+void OpenGLVertexArrayObject::destroy()
+{
+    QMutexLocker locker(&m_mutex);
+
+    Q_ASSERT(m_ctx);
+    cleanup();
+}
+
+void OpenGLVertexArrayObject::cleanup()
+{
+    m_vao.reset();
+    m_ctx = nullptr;
+    m_specified = false;
+    m_supportsVao = false;
+    m_indexAttribute = SubmissionContext::VAOIndexAttribute();
+    m_vertexAttributes.clear();
+}
+
+// called from job
+bool OpenGLVertexArrayObject::isAbandoned(GeometryManager *geomMgr, GLShaderManager *shaderMgr)
+{
+    QMutexLocker lock(&m_mutex);
+
+    if (!m_ctx)
+        return false;
+
+    const bool geometryExists = (geomMgr->data(m_owners.first) != nullptr);
+    const bool shaderExists = (shaderMgr->lookupResource(m_owners.second) != nullptr);
+
+    return !geometryExists || !shaderExists;
+}
+
+void OpenGLVertexArrayObject::saveVertexAttribute(const SubmissionContext::VAOVertexAttribute &attr)
+{
+    // Remove any vertexAttribute already at location
+    for (auto i = m_vertexAttributes.size() - 1; i >= 0; --i) {
+        if (m_vertexAttributes.at(i).location == attr.location) {
+            m_vertexAttributes.removeAt(i);
+            break;
+        }
+    }
+    m_vertexAttributes.push_back(attr);
+}
+
+
+} // namespace OpenGL
+} // namespace Render
+} // namespace Qt3DRender
+
+QT_END_NAMESPACE