qsgtexturematerial.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qsgtexturematerial_p.h"
#include <private/qsgtexture_p.h>
#include <rhi/qrhi.h>
 
QT_BEGIN_NAMESPACE
 
inline static bool isPowerOfTwo(int x)
{
    // Assumption: x >= 1
    return x == (x & -x);
}
 
QSGOpaqueTextureMaterialRhiShader::QSGOpaqueTextureMaterialRhiShader(int viewCount)
{
    setShaderFileName(VertexStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/opaquetexture.vert.qsb"), viewCount);
    setShaderFileName(FragmentStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/opaquetexture.frag.qsb"), viewCount);
}
 
bool QSGOpaqueTextureMaterialRhiShader::updateUniformData(RenderState &state, QSGMaterial *newMaterial, QSGMaterial *)
{
    bool changed = false;
    QByteArray *buf = state.uniformData();
    const int matrixCount = qMin(state.projectionMatrixCount(), newMaterial->viewCount());
 
    for (int viewIndex = 0; viewIndex < matrixCount; ++viewIndex) {
        if (state.isMatrixDirty()) {
            const QMatrix4x4 m = state.combinedMatrix(viewIndex);
            memcpy(buf->data() + 64 * viewIndex, m.constData(), 64);
            changed = true;
        }
    }
 
    return changed;
}
 
void QSGOpaqueTextureMaterialRhiShader::updateSampledImage(RenderState &state, int binding, QSGTexture **texture,
                                                           QSGMaterial *newMaterial, QSGMaterial *oldMaterial)
{
    if (binding != 1)
        return;
 
#ifdef QT_NO_DEBUG
    Q_UNUSED(oldMaterial);
#endif
    Q_ASSERT(oldMaterial == nullptr || newMaterial->type() == oldMaterial->type());
    QSGOpaqueTextureMaterial *tx = static_cast<QSGOpaqueTextureMaterial *>(newMaterial);
    QSGTexture *t = tx->texture();
    if (!t) {
        *texture = nullptr;
        return;
    }
 
    t->setFiltering(tx->filtering());
    t->setMipmapFiltering(tx->mipmapFiltering());
    t->setAnisotropyLevel(tx->anisotropyLevel());
 
    t->setHorizontalWrapMode(tx->horizontalWrapMode());
    t->setVerticalWrapMode(tx->verticalWrapMode());
    if (!state.rhi()->isFeatureSupported(QRhi::NPOTTextureRepeat)) {
        QSize size = t->textureSize();
        const bool isNpot = !isPowerOfTwo(size.width()) || !isPowerOfTwo(size.height());
        if (isNpot) {
            t->setHorizontalWrapMode(QSGTexture::ClampToEdge);
            t->setVerticalWrapMode(QSGTexture::ClampToEdge);
            t->setMipmapFiltering(QSGTexture::None);
        }
    }
 
    t->commitTextureOperations(state.rhi(), state.resourceUpdateBatch());
    *texture = t;
}
 
 
QSGOpaqueTextureMaterial::QSGOpaqueTextureMaterial()
    : m_texture(nullptr)
    , m_filtering(QSGTexture::Nearest)
    , m_mipmap_filtering(QSGTexture::None)
    , m_horizontal_wrap(QSGTexture::ClampToEdge)
    , m_vertical_wrap(QSGTexture::ClampToEdge)
    , m_anisotropy_level(QSGTexture::AnisotropyNone)
{
}
 
 
QSGMaterialType *QSGOpaqueTextureMaterial::type() const
{
    static QSGMaterialType type;
    return &type;
}
 
QSGMaterialShader *QSGOpaqueTextureMaterial::createShader(QSGRendererInterface::RenderMode renderMode) const
{
    Q_UNUSED(renderMode);
    return new QSGOpaqueTextureMaterialRhiShader(viewCount());
}
 
 
void QSGOpaqueTextureMaterial::setTexture(QSGTexture *texture)
{
    m_texture = texture;
    setFlag(Blending, m_texture ? m_texture->hasAlphaChannel() : false);
}
 
 
 
int QSGOpaqueTextureMaterial::compare(const QSGMaterial *o) const
{
    Q_ASSERT(o && type() == o->type());
    const QSGOpaqueTextureMaterial *other = static_cast<const QSGOpaqueTextureMaterial *>(o);
    Q_ASSERT(m_texture);
    Q_ASSERT(other->texture());
    const qint64 diff = m_texture->comparisonKey() - other->texture()->comparisonKey();
    if (diff != 0)
        return diff < 0 ? -1 : 1;
    return int(m_filtering) - int(other->m_filtering);
}
 
 
 
QSGMaterialType *QSGTextureMaterial::type() const
{
    static QSGMaterialType type;
    return &type;
}
 
QSGMaterialShader *QSGTextureMaterial::createShader(QSGRendererInterface::RenderMode renderMode) const
{
    Q_UNUSED(renderMode);
    return new QSGTextureMaterialRhiShader(viewCount());
}
 
 
QSGTextureMaterialRhiShader::QSGTextureMaterialRhiShader(int viewCount)
    : QSGOpaqueTextureMaterialRhiShader(viewCount)
{
    setShaderFileName(VertexStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/texture.vert.qsb"), viewCount);
    setShaderFileName(FragmentStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/texture.frag.qsb"), viewCount);
}
 
bool QSGTextureMaterialRhiShader::updateUniformData(RenderState &state, QSGMaterial *newMaterial, QSGMaterial *oldMaterial)
{
    bool changed = false;
    QByteArray *buf = state.uniformData();
    const int shaderMatrixCount = newMaterial->viewCount();
 
    if (state.isOpacityDirty()) {
        const float opacity = state.opacity();
        memcpy(buf->data() + 64 * shaderMatrixCount, &opacity, 4);
        changed = true;
    }
 
    changed |= QSGOpaqueTextureMaterialRhiShader::updateUniformData(state, newMaterial, oldMaterial);
 
    return changed;
}
 
QT_END_NAMESPACE