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+/****************************************************************************
+**
+** Copyright (C) 2008-2016 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_PREFILTER_TEXTURE_H
+#define QT3DS_RENDER_PREFILTER_TEXTURE_H
+#include "foundation/Qt3DSAtomic.h"
+#include "render/Qt3DSRenderTexture2D.h"
+#include "Qt3DSRender.h"
+
+#include "Qt3DSTypes.h"
+#include "Qt3DSRenderLoadedTexture.h"
+
+namespace qt3ds {
+namespace render {
+
+ class Qt3DSRenderPrefilterTexture : public NVRefCounted
+ {
+ public:
+ Qt3DSRenderPrefilterTexture(NVRenderContext *inNVRenderContext, QT3DSI32 inWidth, QT3DSI32 inHeight,
+ NVRenderTexture2D &inTexture,
+ NVRenderTextureFormats::Enum inDestFormat,
+ qt3ds::NVFoundationBase &inFnd);
+ virtual ~Qt3DSRenderPrefilterTexture();
+
+ virtual void Build(void *inTextureData, QT3DSI32 inTextureDataSize,
+ NVRenderTextureFormats::Enum inFormat) = 0;
+
+ static Qt3DSRenderPrefilterTexture *Create(NVRenderContext *inNVRenderContext, QT3DSI32 inWidth,
+ QT3DSI32 inHeight, NVRenderTexture2D &inTexture,
+ NVRenderTextureFormats::Enum inDestFormat,
+ qt3ds::NVFoundationBase &inFnd);
+
+ protected:
+ NVFoundationBase &m_Foundation; ///< Foundation class for allocations and other base things
+ volatile QT3DSI32 mRefCount; ///< reference count
+
+ NVRenderTexture2D &m_Texture2D;
+ NVRenderTextureFormats::Enum m_InternalFormat;
+ NVRenderTextureFormats::Enum m_DestinationFormat;
+
+ QT3DSI32 m_Width;
+ QT3DSI32 m_Height;
+ QT3DSI32 m_MaxMipMapLevel;
+ QT3DSI32 m_SizeOfFormat;
+ QT3DSI32 m_SizeOfInternalFormat;
+ QT3DSI32 m_InternalNoOfComponent;
+ QT3DSI32 m_NoOfComponent;
+ NVRenderContext *m_NVRenderContext;
+ };
+
+ class Qt3DSRenderPrefilterTextureCPU : public Qt3DSRenderPrefilterTexture
+ {
+ public:
+ Qt3DSRenderPrefilterTextureCPU(NVRenderContext *inNVRenderContext, QT3DSI32 inWidth,
+ QT3DSI32 inHeight, NVRenderTexture2D &inTexture,
+ NVRenderTextureFormats::Enum inDestFormat,
+ qt3ds::NVFoundationBase &inFnd);
+
+ void Build(void *inTextureData, QT3DSI32 inTextureDataSize,
+ NVRenderTextureFormats::Enum inFormat) override;
+
+ STextureData CreateBsdfMipLevel(STextureData &inCurMipLevel, STextureData &inPrevMipLevel,
+ QT3DSI32 width, QT3DSI32 height);
+ QT3DS_IMPLEMENT_REF_COUNT_ADDREF_RELEASE_OVERRIDE(m_Foundation)
+
+ int wrapMod(int a, int base);
+ void getWrappedCoords(int &sX, int &sY, int width, int height);
+ };
+
+ class Qt3DSRenderPrefilterTextureCompute : public Qt3DSRenderPrefilterTexture
+ {
+ public:
+ Qt3DSRenderPrefilterTextureCompute(NVRenderContext *inNVRenderContext, QT3DSI32 inWidth,
+ QT3DSI32 inHeight, NVRenderTexture2D &inTexture,
+ NVRenderTextureFormats::Enum inDestFormat,
+ qt3ds::NVFoundationBase &inFnd);
+ ~Qt3DSRenderPrefilterTextureCompute();
+
+ void Build(void *inTextureData, QT3DSI32 inTextureDataSize,
+ NVRenderTextureFormats::Enum inFormat) override;
+
+ QT3DS_IMPLEMENT_REF_COUNT_ADDREF_RELEASE_OVERRIDE(m_Foundation)
+
+ private:
+ void CreateLevel0Tex(void *inTextureData, QT3DSI32 inTextureDataSize,
+ NVRenderTextureFormats::Enum inFormat);
+
+ NVScopedRefCounted<NVRenderShaderProgram> m_BSDFProgram;
+ NVScopedRefCounted<NVRenderShaderProgram> m_UploadProgram_RGBA8;
+ NVScopedRefCounted<NVRenderShaderProgram> m_UploadProgram_RGB8;
+ NVScopedRefCounted<NVRenderTexture2D> m_Level0Tex;
+ bool m_TextureCreated;
+
+ void createComputeProgram(NVRenderContext *context);
+ NVRenderShaderProgram *
+ getOrCreateUploadComputeProgram(NVRenderContext *context,
+ NVRenderTextureFormats::Enum inFormat);
+ };
+}
+}
+
+#endif