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/****************************************************************************
**
** 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_FRAME_BUFFER_H
#define QT3DS_RENDER_QT3DS_RENDER_FRAME_BUFFER_H
#include "foundation/Qt3DSRefCounted.h"
#include "foundation/Qt3DSAssert.h"
#include "foundation/Qt3DSAtomic.h"
#include "render/Qt3DSRenderBaseTypes.h"
#include "render/backends/Qt3DSRenderBackend.h"
namespace qt3ds {
namespace render {
class NVRenderContextImpl;
class NVRenderTexture2D;
class NVRenderRenderBuffer;
class NVRenderTexture2DArray;
class NVRenderTextureCube;
class NVRenderTextureOrRenderBuffer
{
NVRenderTexture2D *m_Texture2D;
NVRenderTexture2DArray *m_Texture2DArray;
NVRenderTextureCube *m_TextureCube;
NVRenderRenderBuffer *m_RenderBuffer;
public:
NVRenderTextureOrRenderBuffer(NVRenderTexture2D &texture)
: m_Texture2D(&texture)
, m_Texture2DArray(NULL)
, m_TextureCube(NULL)
, m_RenderBuffer(NULL)
{
}
NVRenderTextureOrRenderBuffer(NVRenderRenderBuffer &render)
: m_Texture2D(NULL)
, m_Texture2DArray(NULL)
, m_TextureCube(NULL)
, m_RenderBuffer(&render)
{
}
NVRenderTextureOrRenderBuffer(NVRenderTexture2DArray &textureArray)
: m_Texture2D(NULL)
, m_Texture2DArray(&textureArray)
, m_TextureCube(NULL)
, m_RenderBuffer(NULL)
{
}
NVRenderTextureOrRenderBuffer(NVRenderTextureCube &textureCube)
: m_Texture2D(NULL)
, m_Texture2DArray(NULL)
, m_TextureCube(&textureCube)
, m_RenderBuffer(NULL)
{
}
NVRenderTextureOrRenderBuffer()
: m_Texture2D(NULL)
, m_Texture2DArray(NULL)
, m_TextureCube(NULL)
, m_RenderBuffer(NULL)
{
}
NVRenderTextureOrRenderBuffer(const NVRenderTextureOrRenderBuffer &other)
: m_Texture2D(other.m_Texture2D)
, m_Texture2DArray(other.m_Texture2DArray)
, m_TextureCube(other.m_TextureCube)
, m_RenderBuffer(other.m_RenderBuffer)
{
}
NVRenderTextureOrRenderBuffer &operator=(const NVRenderTextureOrRenderBuffer &other)
{
if (this != &other) {
m_Texture2D = const_cast<NVRenderTexture2D *>(other.m_Texture2D);
m_Texture2DArray = const_cast<NVRenderTexture2DArray *>(other.m_Texture2DArray);
m_RenderBuffer = const_cast<NVRenderRenderBuffer *>(other.m_RenderBuffer);
m_TextureCube = const_cast<NVRenderTextureCube *>(other.m_TextureCube);
}
return *this;
}
bool HasTexture2D() const { return m_Texture2D != NULL; }
bool HasTexture2DArray() const { return m_Texture2DArray != NULL; }
bool HasTextureCube() const { return m_TextureCube != NULL; }
bool HasRenderBuffer() const { return m_RenderBuffer != NULL; }
NVRenderTexture2D *GetTexture2D() const
{
QT3DS_ASSERT(HasTexture2D());
return m_Texture2D;
}
NVRenderTexture2DArray *GetTexture2DArray() const
{
QT3DS_ASSERT(HasTexture2DArray());
return m_Texture2DArray;
}
NVRenderTextureCube *GetTextureCube() const
{
QT3DS_ASSERT(HasTextureCube());
return m_TextureCube;
}
NVRenderRenderBuffer *GetRenderBuffer() const
{
QT3DS_ASSERT(HasRenderBuffer());
return m_RenderBuffer;
}
};
class NVRenderFrameBuffer : public NVRefCounted, public NVRenderImplemented
{
private:
NVRenderContextImpl &m_Context; ///< pointer to context
NVFoundationBase &m_Foundation; ///< pointer to foundation
volatile QT3DSI32 mRefCount; ///< Using foundations' naming convention to ease implementation
NVRenderBackend *m_Backend; ///< pointer to backend
NVRenderTextureOrRenderBuffer
m_Attachments[NVRenderFrameBufferAttachments::LastAttachment]; ///< attachments array
NVRenderBackend::NVRenderBackendRenderTargetObject
m_BufferHandle; ///< opaque backend handle
public:
/**
* @brief constructor
*
* @param[in] context Pointer to context
* @param[in] fnd Pointer to foundation
*
* @return No return.
*/
NVRenderFrameBuffer(NVRenderContextImpl &context, NVFoundationBase &fnd);
/// destructor
virtual ~NVRenderFrameBuffer();
// define refcount functions
QT3DS_IMPLEMENT_REF_COUNT_ADDREF_RELEASE_OVERRIDE(m_Foundation)
/**
* @brief query attachment
*
*
* @return buffer format
*/
virtual NVRenderTextureOrRenderBuffer
GetAttachment(NVRenderFrameBufferAttachments::Enum attachment);
/**
* @brief Attach a render or texture buffer to a render target
* For texture attachments we use always level 0
*
* @param[in] attachment Attachment point (e.g. COLOR0, DEPTH...)
* @param[in] buffer Contains a pointer to the attachment
* @param[in] target Attachment texture target
*
* @return no return
*/
virtual void
Attach(NVRenderFrameBufferAttachments::Enum attachment,
NVRenderTextureOrRenderBuffer buffer,
NVRenderTextureTargetType::Enum target = NVRenderTextureTargetType::Texture2D);
/**
* @brief Attach a particular layer of the texture 2D array to a render target
*
* @param[in] attachment Attachment point (e.g. COLOR0, DEPTH...)
* @param[in] buffer Pointer to the Texture Array which contains the
* layers
* @param[in] layer The index to the layer that will be attached to the
* target
* @param[in] level Mip level of the texture that will be attached
* (default 0)
*
* @return no return
*/
virtual void AttachLayer(NVRenderFrameBufferAttachments::Enum attachment,
NVRenderTextureOrRenderBuffer buffer, QT3DSI32 layer,
QT3DSI32 level = 0);
/**
* @brief Attach a particular face of the texture cubemap to a render target
*
* @param[in] attachment Attachment point (e.g. COLOR0, DEPTH...)
* @param[in] buffer Pointer to the Texture Array which contains the
* layers
* @param[in] face The face of the cubemap that will be attached to the
* target
* @param[in] level Mip level of the texture that will be attached
* (default 0)
*
* @return no return
*/
virtual void AttachFace(NVRenderFrameBufferAttachments::Enum attachment,
NVRenderTextureOrRenderBuffer buffer,
NVRenderTextureCubeFaces::Enum face);
/**
* @brief Check that this framebuffer is complete and can be rendered to.
*
*
* @return true if complete
*/
virtual bool IsComplete();
/**
* @brief query if framebuffer has any attachment
*
* @return true if any attachment
*/
virtual bool HasAnyAttachment() { return (m_AttachmentBits != 0); }
/**
* @brief get the backend object handle
*
* @return the backend object handle.
*/
virtual NVRenderBackend::NVRenderBackendRenderTargetObject GetFrameBuffertHandle()
{
return m_BufferHandle;
}
// this will be obsolete
const void *GetImplementationHandle() const override
{
return reinterpret_cast<const void *>(m_BufferHandle);
}
/**
* @brief static creator function
*
* @param[in] context Pointer to context
*
* @return a pointer to framebuffer object.
*/
static NVRenderFrameBuffer *Create(NVRenderContextImpl &context);
private:
/**
* @brief releaes an attached object
*
* @return which target we released
*/
NVRenderTextureTargetType::Enum releaseAttachment(NVRenderFrameBufferAttachments::Enum idx);
QT3DSU32 m_AttachmentBits; ///< holds flags for current attached buffers
};
}
}
#endif
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