1 files changed, 104 insertions, 0 deletions
diff --git a/src/Runtime/ogl-runtime/src/render/Qt3DSRenderDrawIndirectBuffer.cpp b/src/Runtime/ogl-runtime/src/render/Qt3DSRenderDrawIndirectBuffer.cpp
new file mode 100644
index 00000000..9940003f
--- /dev/null
+++ b/src/Runtime/ogl-runtime/src/render/Qt3DSRenderDrawIndirectBuffer.cpp
@@ -0,0 +1,104 @@
+/****************************************************************************
+**
+** Copyright (C) 2008-2012 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) 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.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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "render/Qt3DSRenderDrawIndirectBuffer.h"
+#include "render/Qt3DSRenderContext.h"
+#include "render/Qt3DSRenderShaderProgram.h"
+
+namespace qt3ds {
+namespace render {
+
+    NVRenderDrawIndirectBuffer::NVRenderDrawIndirectBuffer(NVRenderContextImpl &context,
+                                                           size_t size,
+                                                           NVRenderBufferUsageType::Enum usageType,
+                                                           NVDataRef<QT3DSU8> data)
+        : NVRenderDataBuffer(context, context.GetFoundation(), size,
+                             NVRenderBufferBindValues::Draw_Indirect, usageType, data)
+        , m_Dirty(true)
+    {
+    }
+
+    NVRenderDrawIndirectBuffer::~NVRenderDrawIndirectBuffer() { m_Context.BufferDestroyed(*this); }
+
+    void NVRenderDrawIndirectBuffer::Bind()
+    {
+        if (m_Mapped) {
+            qCCritical(INVALID_OPERATION, "Attempting to Bind a locked buffer");
+            QT3DS_ASSERT(false);
+        }
+
+        m_Backend->BindBuffer(m_BufferHandle, m_BindFlags);
+    }
+
+    void NVRenderDrawIndirectBuffer::Update()
+    {
+        // we only update the buffer if it is dirty and we actually have some data
+        if (m_Dirty && m_BufferData.size()) {
+            m_Backend->UpdateBuffer(m_BufferHandle, m_BindFlags, m_BufferData.size(), m_UsageType,
+                                    m_BufferData.begin());
+            m_Dirty = false;
+        }
+    }
+
+    void NVRenderDrawIndirectBuffer::UpdateData(QT3DSI32 offset, NVDataRef<QT3DSU8> data)
+    {
+        // we only update the buffer if we something
+        if (data.size())
+            m_Backend->UpdateBuffer(m_BufferHandle, m_BindFlags, data.size(), m_UsageType,
+                                    data.begin() + offset);
+    }
+
+    NVRenderDrawIndirectBuffer *
+    NVRenderDrawIndirectBuffer::Create(NVRenderContextImpl &context,
+                                       NVRenderBufferUsageType::Enum usageType, size_t size,
+                                       NVConstDataRef<QT3DSU8> bufferData)
+    {
+        NVFoundationBase &fnd(context.GetFoundation());
+        NVRenderDrawIndirectBuffer *retval = NULL;
+
+        // these are the context flags which do not support this drawing mode
+        NVRenderContextType noDrawIndirectSupported(
+            NVRenderContextValues::GL2 | NVRenderContextValues::GLES2 | NVRenderContextValues::GL3
+            | NVRenderContextValues::GLES3);
+        NVRenderContextType ctxType = context.GetRenderContextType();
+
+        if (!(ctxType & noDrawIndirectSupported)) {
+            QT3DSU32 bufSize = sizeof(NVRenderDrawIndirectBuffer);
+            QT3DSU8 *newMem = (QT3DSU8 *)QT3DS_ALLOC(fnd.getAllocator(), bufSize, "DrawIndirectBuffer");
+            retval = new (newMem) NVRenderDrawIndirectBuffer(
+                context, size, usageType,
+                toDataRef(const_cast<QT3DSU8 *>(bufferData.begin()), bufferData.size()));
+        } else {
+            QT3DS_ASSERT(false);
+        }
+        return retval;
+    }
+}
+}