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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsgflatcolormaterial.h"
#include <qopenglshaderprogram.h>
QT_BEGIN_NAMESPACE
class FlatColorMaterialShader : public QSGMaterialShader
{
public:
virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
virtual char const *const *attributeNames() const;
static QSGMaterialType type;
private:
virtual void initialize();
virtual const char *vertexShader() const;
virtual const char *fragmentShader() const;
int m_matrix_id;
int m_color_id;
};
QSGMaterialType FlatColorMaterialShader::type;
void FlatColorMaterialShader::updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect)
{
Q_ASSERT(oldEffect == 0 || newEffect->type() == oldEffect->type());
QSGFlatColorMaterial *oldMaterial = static_cast<QSGFlatColorMaterial *>(oldEffect);
QSGFlatColorMaterial *newMaterial = static_cast<QSGFlatColorMaterial *>(newEffect);
const QColor &c = newMaterial->color();
if (oldMaterial == 0 || c != oldMaterial->color() || state.isOpacityDirty()) {
float opacity = state.opacity();
QVector4D v(c.redF() * c.alphaF() * opacity,
c.greenF() * c.alphaF() * opacity,
c.blueF() * c.alphaF() * opacity,
c.alphaF() * opacity);
program()->setUniformValue(m_color_id, v);
}
if (state.isMatrixDirty())
program()->setUniformValue(m_matrix_id, state.combinedMatrix());
}
char const *const *FlatColorMaterialShader::attributeNames() const
{
static char const *const attr[] = { "vCoord", 0 };
return attr;
}
void FlatColorMaterialShader::initialize()
{
m_matrix_id = program()->uniformLocation("matrix");
m_color_id = program()->uniformLocation("color");
}
const char *FlatColorMaterialShader::vertexShader() const {
return
"attribute highp vec4 vCoord; \n"
"uniform highp mat4 matrix; \n"
"void main() { \n"
" gl_Position = matrix * vCoord; \n"
"}";
}
const char *FlatColorMaterialShader::fragmentShader() const {
return
"uniform lowp vec4 color; \n"
"void main() { \n"
" gl_FragColor = color; \n"
"}";
}
/*!
\class QSGFlatColorMaterial
\brief The QSGFlatColorMaterial class provides a convenient way of rendering
solid colored geometry in the scene graph.
\inmodule QtQuick
The flat color material will fill every pixel in a geometry using
a solid color. The color can contain transparency.
The geometry to be rendered with a flat color material requires
vertices in attribute location 0 in the QSGGeometry object to render
correctly. The QSGGeometry::defaultAttributes_Point2D() returns an attribute
set compatible with this material.
The flat color material respects both current opacity and current matrix
when updating it's rendering state.
*/
/*!
Constructs a new flat color material.
The default color is white.
*/
QSGFlatColorMaterial::QSGFlatColorMaterial() : m_color(QColor(255, 255, 255))
{
}
/*!
\fn QColor QSGFlatColorMaterial::color() const
Returns this flat color material's color.
The default color is white.
*/
/*!
Sets this flat color material's color to \a color.
*/
void QSGFlatColorMaterial::setColor(const QColor &color)
{
m_color = color;
setFlag(Blending, m_color.alpha() != 0xff);
}
/*!
\internal
*/
QSGMaterialType *QSGFlatColorMaterial::type() const
{
return &FlatColorMaterialShader::type;
}
/*!
\internal
*/
QSGMaterialShader *QSGFlatColorMaterial::createShader() const
{
return new FlatColorMaterialShader;
}
int QSGFlatColorMaterial::compare(const QSGMaterial *other) const
{
const QSGFlatColorMaterial *flat = static_cast<const QSGFlatColorMaterial *>(other);
return m_color.rgba() - flat->color().rgba();
}
QT_END_NAMESPACE
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