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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsgsimpletexturenode.h"
#include <private/qsgnode_p.h>
QT_BEGIN_NAMESPACE
class QSGSimpleTextureNodePrivate : public QSGGeometryNodePrivate
{
public:
QSGSimpleTextureNodePrivate()
: QSGGeometryNodePrivate()
, m_texCoordMode(QSGSimpleTextureNode::NoTransform)
, isAtlasTexture(false)
{}
QSGSimpleTextureNode::TextureCoordinatesTransformMode m_texCoordMode;
uint isAtlasTexture : 1;
};
static void qsgsimpletexturenode_update(QSGGeometry *g,
QSGTexture *texture,
const QRectF &rect,
QSGSimpleTextureNode::TextureCoordinatesTransformMode texCoordMode)
{
if (!texture)
return;
QSize ts = texture->textureSize();
QRectF sourceRect(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));
}
/*!
\class QSGSimpleTextureNode
\brief The QSGSimpleTextureNode class is provided for convenience to easily draw
textured content using the QML scene graph.
\inmodule QtQuick
\warning The simple texture node class must have a texture before being
added to the scene graph to be rendered.
*/
/*!
Constructs a new simple texture node
*/
QSGSimpleTextureNode::QSGSimpleTextureNode()
: QSGGeometryNode(*new QSGSimpleTextureNodePrivate)
, m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4)
{
setGeometry(&m_geometry);
setMaterial(&m_material);
setOpaqueMaterial(&m_opaque_material);
#ifdef QSG_RUNTIME_DESCRIPTION
qsgnode_set_description(this, QLatin1String("simpletexture"));
#endif
}
/*!
Sets the filtering to be used for this texture node to \a filtering.
For smooth scaling, use QSGTexture::Linear; for normal scaling, use
QSGTexture::Nearest.
*/
void QSGSimpleTextureNode::setFiltering(QSGTexture::Filtering filtering)
{
if (m_material.filtering() == filtering)
return;
m_material.setFiltering(filtering);
m_opaque_material.setFiltering(filtering);
markDirty(DirtyMaterial);
}
/*!
Returns the filtering currently set on this texture node
*/
QSGTexture::Filtering QSGSimpleTextureNode::filtering() const
{
return m_material.filtering();
}
/*!
Sets the target rect of this texture node to \a r.
*/
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->m_texCoordMode);
markDirty(DirtyGeometry);
}
/*!
\fn void QSGSimpleTextureNode::setRect(qreal x, qreal y, qreal w, qreal h)
\overload
Sets the rectangle of this texture node to begin at (\a x, \a y) and have
width \a w and height \a h.
*/
/*!
Returns the target rect of this texture node.
*/
QRectF QSGSimpleTextureNode::rect() const
{
return m_rect;
}
/*!
Sets the texture of this texture node to \a texture.
\warning A texture node must have a texture before being added
to the scenegraph to be rendered.
*/
void QSGSimpleTextureNode::setTexture(QSGTexture *texture)
{
Q_ASSERT(texture);
m_material.setTexture(texture);
m_opaque_material.setTexture(texture);
Q_D(QSGSimpleTextureNode);
qsgsimpletexturenode_update(&m_geometry, texture, m_rect, d->m_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);
}
/*!
Returns the texture for this texture node
*/
QSGTexture *QSGSimpleTextureNode::texture() const
{
return m_material.texture();
}
/*!
\enum QSGSimpleTextureNode::TextureCoordinatesTransformFlag
The TextureCoordinatesTransformFlag enum is used to specify the
mode used to generate texture coordinates for a textured quad.
\value NoTransform Texture coordinates are oriented with window coordinates
i.e. with origin at top-left.
\value MirrorHorizontally Texture coordinates are inverted in the horizontal axis with
respect to window coordinates
\value MirrorVertically Texture coordinates are inverted in the vertical axis with
respect to window coordinates
*/
/*!
Sets the method used to generate texture coordinates to \a mode. This can be used to obtain
correct orientation of the texture. This is commonly needed when using a third party OpenGL
library to render to texture as OpenGL has an inverted y-axis relative to Qt Quick.
\sa textureCoordinatesTransform()
*/
void QSGSimpleTextureNode::setTextureCoordinatesTransform(QSGSimpleTextureNode::TextureCoordinatesTransformMode mode)
{
Q_D(QSGSimpleTextureNode);
if (d->m_texCoordMode == mode)
return;
d->m_texCoordMode = mode;
qsgsimpletexturenode_update(&m_geometry, texture(), m_rect, d->m_texCoordMode);
markDirty(DirtyMaterial);
}
/*!
Returns the mode used to generate texture coordinates for this node.
\sa setTextureCoordinatesTransform()
*/
QSGSimpleTextureNode::TextureCoordinatesTransformMode QSGSimpleTextureNode::textureCoordinatesTransform() const
{
Q_D(const QSGSimpleTextureNode);
return d->m_texCoordMode;
}
QT_END_NAMESPACE
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