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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_TEXTURE_BUFFER_H
#define QT3DS_RENDER_QT3DS_RENDER_TEXTURE_BUFFER_H
#include "render/Qt3DSRenderBaseTypes.h"
#include "foundation/Qt3DSRefCounted.h"
#include "foundation/Qt3DSOption.h"
#include "foundation/Qt3DSAtomic.h"
#include "render/backends/Qt3DSRenderBackend.h"
namespace qt3ds {
namespace render {
class NVRenderContextImpl;
class NVRenderTextureSampler;
struct STextureDetails
{
QT3DSU32 m_Width;
QT3DSU32 m_Height;
QT3DSU32 m_Depth;
QT3DSU32 m_SampleCount;
NVRenderTextureFormats::Enum m_Format;
STextureDetails(QT3DSU32 w, QT3DSU32 h, QT3DSU32 d, QT3DSU32 samples, NVRenderTextureFormats::Enum f)
: m_Width(w)
, m_Height(h)
, m_Depth(d)
, m_SampleCount(samples)
, m_Format(f)
{
}
STextureDetails()
: m_Width(0)
, m_Height(0)
, m_Depth(0)
, m_SampleCount(1)
, m_Format(NVRenderTextureFormats::Unknown)
{
}
};
class NVRenderTextureBase : public NVRefCounted
{
protected:
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
NVRenderBackend::NVRenderBackendTextureObject m_TextureHandle; ///< opaque backend handle
QT3DSU32 m_TextureUnit; ///< texture unit this texture should use
bool m_SamplerParamsDirty; ///< true if sampler state is dirty
bool m_TexStateDirty; ///< true if texture object state is dirty
QT3DSU32 m_SampleCount; ///< texture height
NVRenderTextureFormats::Enum m_Format; ///< texture format
NVRenderTextureTargetType::Enum m_TexTarget; ///< texture target
NVRenderTextureSampler *m_Sampler; ///< current texture sampler state
QT3DSI32 m_BaseLevel; ///< minimum lod specified
QT3DSI32 m_MaxLevel; ///< maximum lod specified
QT3DSU32 m_MaxMipLevel; ///< highest mip level
bool m_Immutable; ///< true if this is a immutable texture ( size and format )
public:
/**
* @brief constructor
*
* @param[in] context Pointer to context
* @param[in] fnd Pointer to foundation
* @param[in] texTarget Texture target
*
* @return No return.
*/
NVRenderTextureBase(NVRenderContextImpl &context, NVFoundationBase &fnd,
NVRenderTextureTargetType::Enum texTarget);
virtual ~NVRenderTextureBase();
// define refcount functions
QT3DS_IMPLEMENT_REF_COUNT_ADDREF_RELEASE(m_Foundation)
virtual void SetMinFilter(NVRenderTextureMinifyingOp::Enum value);
virtual void SetMagFilter(NVRenderTextureMagnifyingOp::Enum value);
virtual void SetBaseLevel(QT3DSI32 value);
virtual void SetMaxLevel(QT3DSI32 value);
virtual void SetTextureWrapS(NVRenderTextureCoordOp::Enum value);
virtual void SetTextureWrapT(NVRenderTextureCoordOp::Enum value);
virtual void SetTextureCompareMode(NVRenderTextureCompareMode::Enum value);
virtual void SetTextureCompareFunc(NVRenderTextureCompareOp::Enum value);
virtual void SetTextureUnit(QT3DSU32 unit) { m_TextureUnit = unit; }
virtual QT3DSU32 GetTextureUnit() const { return m_TextureUnit; }
// Get the texture details for mipmap level 0 if it was set.
virtual STextureDetails GetTextureDetails() const = 0;
virtual bool IsMultisampleTexture() const
{
return (m_TexTarget == NVRenderTextureTargetType::Texture2D_MS);
}
virtual QT3DSU32 GetSampleCount() const { return m_SampleCount; }
virtual bool IsImmutableTexture() const { return m_Immutable; }
/**
* @brief Bind a texture for shader access
*
*
* @return No return.
*/
virtual void Bind() = 0;
virtual QT3DSU32 GetNumMipmaps() { return m_MaxMipLevel; }
/**
* @brief Query if texture needs coordinate swizzle
*
* @return texture swizzle mode
*/
virtual NVRenderTextureSwizzleMode::Enum GetTextureSwizzleMode()
{
// if our backend supports hardware texture swizzle then there is no need for a shader
// swizzle
return (m_Backend->GetRenderBackendCap(
NVRenderBackend::NVRenderBackendCaps::TexSwizzle))
? NVRenderTextureSwizzleMode::NoSwizzle
: m_Backend->GetTextureSwizzleMode(m_Format);
}
/**
* @brief get the backend object handle
*
* @return the backend object handle.
*/
virtual NVRenderBackend::NVRenderBackendTextureObject GetTextureObjectHandle()
{
return m_TextureHandle;
}
protected:
void applyTexParams();
void applyTexSwizzle();
};
}
}
#endif
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