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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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "Qt3DSTextRenderer.h"
#include "render/Qt3DSRenderTexture2D.h"
using namespace qt3ds::render;
// http://acius2.blogspot.com/2007/11/calculating-next-power-of-2.html
QT3DSU32 ITextRenderer::NextPowerOf2(QT3DSU32 input)
{
// Algorithm doesn't work for 0 or QT3DS_MAX_U32
QT3DS_ASSERT(input > 0 && input < QT3DS_MAX_U32);
input--;
input = (input >> 1) | input;
input = (input >> 2) | input;
input = (input >> 4) | input;
input = (input >> 8) | input;
input = (input >> 16) | input;
input++; // input is now the next highest power of 2.
return input;
}
QT3DSU32 ITextRenderer::NextMultipleOf4(QT3DSU32 inValue)
{
QT3DSU32 remainder(inValue % 4);
if (remainder != 0)
inValue = inValue + (4 - remainder);
return inValue;
}
STextTextureDetails ITextRenderer::UploadData(NVDataRef<QT3DSU8> inTextureData,
NVRenderTexture2D &inTexture, QT3DSU32 inDataWidth,
QT3DSU32 inDataHeight, QT3DSU32 inTextWidth,
QT3DSU32 inTextHeight,
NVRenderTextureFormats::Enum inFormat,
bool inFlipYAxis)
{
if (inTextWidth == 0 || inTextHeight == 0) {
QT3DSU32 black[] = { 0, 0, 0, 0 };
inTexture.SetTextureData(toU8DataRef(black, 4), 0, 2, 2, NVRenderTextureFormats::RGBA8);
return STextTextureDetails(2, 2, false, QT3DSVec2(1.0));
}
QT3DS_ASSERT(NextMultipleOf4(inDataWidth) == inDataWidth);
QT3DSU32 theNecessaryHeight = NextMultipleOf4(inTextHeight);
QT3DSU32 dataStride = inDataWidth * NVRenderTextureFormats::getSizeofFormat(inFormat);
if (inTextureData.size() < dataStride * inDataHeight) {
QT3DS_ASSERT(false);
return STextTextureDetails();
}
STextureDetails theTextureDetails = inTexture.GetTextureDetails();
QT3DSU32 theUploadSize = theNecessaryHeight * dataStride;
NVDataRef<QT3DSU8> theUploadData = NVDataRef<QT3DSU8>(inTextureData.begin(), theUploadSize);
inTexture.SetTextureData(theUploadData, 0, inDataWidth, theNecessaryHeight, inFormat);
inTexture.SetMagFilter(qt3ds::render::NVRenderTextureMagnifyingOp::Linear);
inTexture.SetMinFilter(qt3ds::render::NVRenderTextureMinifyingOp::Linear);
return STextTextureDetails(inTextWidth, inTextHeight, inFlipYAxis, QT3DSVec2(1.0f, 1.0f));
}
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