qsgsimpletexturenode.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 "qsgsimpletexturenode.h"
#include <private/qsgnode_p.h>
 
QT_BEGIN_NAMESPACE
 
class QSGSimpleTextureNodePrivate : public QSGGeometryNodePrivate
{
public:
    QSGSimpleTextureNodePrivate()
        : texCoordMode(QSGSimpleTextureNode::NoTransform)
        , isAtlasTexture(false)
        , ownsTexture(false)
    {}
 
    QRectF sourceRect;
    QSGSimpleTextureNode::TextureCoordinatesTransformMode texCoordMode;
    uint isAtlasTexture : 1;
    uint ownsTexture : 1;
};
 
static void qsgsimpletexturenode_update(QSGGeometry *g,
                                        QSGTexture *texture,
                                        const QRectF &rect,
                                        QRectF sourceRect,
                                        QSGSimpleTextureNode::TextureCoordinatesTransformMode texCoordMode)
{
    if (!texture)
        return;
 
    if (!sourceRect.width() || !sourceRect.height()) {
        QSize ts = texture->textureSize();
        sourceRect = QRectF(0, 0, ts.width(), ts.height());
    }
 
    // Maybe transform the texture coordinates
    if (texCoordMode.testFlag(QSGSimpleTextureNode::MirrorHorizontally)) {
        float tmp = sourceRect.left();
        sourceRect.setLeft(sourceRect.right());
        sourceRect.setRight(tmp);
    }
    if (texCoordMode.testFlag(QSGSimpleTextureNode::MirrorVertically)) {
        float tmp = sourceRect.top();
        sourceRect.setTop(sourceRect.bottom());
        sourceRect.setBottom(tmp);
    }
 
    QSGGeometry::updateTexturedRectGeometry(g, rect, texture->convertToNormalizedSourceRect(sourceRect));
}
 
QSGSimpleTextureNode::QSGSimpleTextureNode()
    : QSGGeometryNode(*new QSGSimpleTextureNodePrivate)
    , m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4)
{
    setGeometry(&m_geometry);
    setMaterial(&m_material);
    setOpaqueMaterial(&m_opaque_material);
    m_material.setMipmapFiltering(QSGTexture::None);
    m_opaque_material.setMipmapFiltering(QSGTexture::None);
#ifdef QSG_RUNTIME_DESCRIPTION
    qsgnode_set_description(this, QLatin1String("simpletexture"));
#endif
}
 
QSGSimpleTextureNode::~QSGSimpleTextureNode()
{
    Q_D(QSGSimpleTextureNode);
    if (d->ownsTexture)
        delete m_material.texture();
}
 
void QSGSimpleTextureNode::setFiltering(QSGTexture::Filtering filtering)
{
    if (m_material.filtering() == filtering)
        return;
 
    m_material.setFiltering(filtering);
    m_opaque_material.setFiltering(filtering);
    markDirty(DirtyMaterial);
}
 
 
QSGTexture::Filtering QSGSimpleTextureNode::filtering() const
{
    return m_material.filtering();
}
 
 
void QSGSimpleTextureNode::setRect(const QRectF &r)
{
    if (m_rect == r)
        return;
    m_rect = r;
    Q_D(QSGSimpleTextureNode);
    qsgsimpletexturenode_update(&m_geometry, texture(), m_rect, d->sourceRect, d->texCoordMode);
    markDirty(DirtyGeometry);
}
 
QRectF QSGSimpleTextureNode::rect() const
{
    return m_rect;
}
 
void QSGSimpleTextureNode::setSourceRect(const QRectF &r)
{
    Q_D(QSGSimpleTextureNode);
    if (d->sourceRect == r)
        return;
    d->sourceRect = r;
    qsgsimpletexturenode_update(&m_geometry, texture(), m_rect, d->sourceRect, d->texCoordMode);
    markDirty(DirtyGeometry);
}
 
QRectF QSGSimpleTextureNode::sourceRect() const
{
    Q_D(const QSGSimpleTextureNode);
    return d->sourceRect;
}
 
void QSGSimpleTextureNode::setTexture(QSGTexture *texture)
{
    Q_ASSERT(texture);
    Q_D(QSGSimpleTextureNode);
    if (d->ownsTexture)
        delete m_material.texture();
    m_material.setTexture(texture);
    m_opaque_material.setTexture(texture);
    qsgsimpletexturenode_update(&m_geometry, texture, m_rect, d->sourceRect, d->texCoordMode);
 
    DirtyState dirty = DirtyMaterial;
    // It would be tempting to skip the extra bit here and instead use
    // m_material.texture to get the old state, but that texture could
    // have been deleted in the mean time.
    bool wasAtlas = d->isAtlasTexture;
    d->isAtlasTexture = texture->isAtlasTexture();
    if (wasAtlas || d->isAtlasTexture)
        dirty |= DirtyGeometry;
    markDirty(dirty);
}
 
 
 
QSGTexture *QSGSimpleTextureNode::texture() const
{
    return m_material.texture();
}
 
void QSGSimpleTextureNode::setTextureCoordinatesTransform(QSGSimpleTextureNode::TextureCoordinatesTransformMode mode)
{
    Q_D(QSGSimpleTextureNode);
    if (d->texCoordMode == mode)
        return;
    d->texCoordMode = mode;
    qsgsimpletexturenode_update(&m_geometry, texture(), m_rect, d->sourceRect, d->texCoordMode);
    markDirty(DirtyGeometry | DirtyMaterial);
}
 
QSGSimpleTextureNode::TextureCoordinatesTransformMode QSGSimpleTextureNode::textureCoordinatesTransform() const
{
    Q_D(const QSGSimpleTextureNode);
    return d->texCoordMode;
}
 
void QSGSimpleTextureNode::setOwnsTexture(bool owns)
{
    Q_D(QSGSimpleTextureNode);
    d->ownsTexture = owns;
}
 
bool QSGSimpleTextureNode::ownsTexture() const
{
    Q_D(const QSGSimpleTextureNode);
    return d->ownsTexture;
}
 
QT_END_NAMESPACE