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Diffstat (limited to 'src/Runtime/Source/render/Qt3DSRenderDrawIndirectBuffer.h')
| -rw-r--r-- | src/Runtime/Source/render/Qt3DSRenderDrawIndirectBuffer.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/Runtime/Source/render/Qt3DSRenderDrawIndirectBuffer.h b/src/Runtime/Source/render/Qt3DSRenderDrawIndirectBuffer.h new file mode 100644 index 00000000..81cd59d1 --- /dev/null +++ b/src/Runtime/Source/render/Qt3DSRenderDrawIndirectBuffer.h @@ -0,0 +1,152 @@ +/**************************************************************************** +** +** 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#pragma once +#ifndef QT3DS_RENDER_QT3DS_RENDER_DRAW_INDIRECT_BUFFER_H +#define QT3DS_RENDER_QT3DS_RENDER_DRAW_INDIRECT_BUFFER_H +#include "foundation/Qt3DSOption.h" +#include "foundation/Utils.h" +#include "foundation/StringTable.h" +#include "render/Qt3DSRenderDataBuffer.h" + +namespace qt3ds { +namespace render { + + using namespace foundation; + + // forward declaration + class NVRenderContextImpl; + + struct DrawArraysIndirectCommand + { + QT3DSU32 count; + QT3DSU32 primCount; + QT3DSU32 first; + QT3DSU32 baseInstance; + }; + + struct DrawElementsIndirectCommand + { + QT3DSU32 count; + QT3DSU32 primCount; + QT3DSU32 firstIndex; + QT3DSU32 baseVertex; + QT3DSU32 baseInstance; + }; + + ///< Constant (uniform) buffer representation + class NVRenderDrawIndirectBuffer : public NVRenderDataBuffer + { + public: + /** + * @brief constructor + * + * @param[in] context Pointer to context + * @param[in] size Size of the buffer + * @param[in] usage Usage of the buffer (e.g. static, dynamic...) + * @param[in] data A pointer to the buffer data that is allocated by the + * application. + * + * @return No return. + */ + NVRenderDrawIndirectBuffer(NVRenderContextImpl &context, size_t size, + NVRenderBufferUsageType::Enum usageType, NVDataRef<QT3DSU8> data); + + ///< destructor + virtual ~NVRenderDrawIndirectBuffer(); + + /** + * @brief bind the buffer bypasses the context state + * + * @return no return. + */ + void Bind() override; + + /** + * @brief update the buffer to hardware + * + * @return no return. + */ + virtual void Update(); + + /** + * @brief update a piece of memory directly within the storage buffer + * + * Note: When you use this function you should know what you are doing. + * The memory layout within C++ must exactly match the memory layout in the + *shader. + * We use std140 (430) layout which guarantees a specific layout behavior across + *all HW vendors. + * How the memory layout is computed can be found in the GL spec. + * + * @param[in] offset offset into storage buffer + * @param[in] data pointer to data + * + * @return no return + */ + void UpdateData(QT3DSI32 offset, NVDataRef<QT3DSU8> data); + + /** + * @brief get the backend object handle + * + * @return the backend object handle. + */ + NVRenderBackend::NVRenderBackendBufferObject GetBuffertHandle() const override + { + return m_BufferHandle; + } + + // this will be obsolete + const void *GetImplementationHandle() const override + { + return reinterpret_cast<void *>(m_BufferHandle); + } + + /** + * @brief create a NVRenderDrawIndirectBuffer object + * + * @param[in] context Pointer to context + * @param[in] size Size of the buffer + * @param[in] usage Usage of the buffer (e.g. static, dynamic...) + * @param[in] data A pointer to the buffer data that is allocated by the + * application. + * + * @return the buffer object or NULL + */ + static NVRenderDrawIndirectBuffer *Create(NVRenderContextImpl &context, + NVRenderBufferUsageType::Enum usageType, + size_t size, NVConstDataRef<QT3DSU8> bufferData); + + private: + bool m_Dirty; ///< true if buffer is dirty + }; +} +} + +#endif |