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Diffstat (limited to 'src/quick/scenegraph/util/qsgflatcolormaterial.cpp')
| -rw-r--r-- | src/quick/scenegraph/util/qsgflatcolormaterial.cpp | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/quick/scenegraph/util/qsgflatcolormaterial.cpp b/src/quick/scenegraph/util/qsgflatcolormaterial.cpp new file mode 100644 index 0000000000..cf5c7869ea --- /dev/null +++ b/src/quick/scenegraph/util/qsgflatcolormaterial.cpp @@ -0,0 +1,202 @@ +/**************************************************************************** +** +** 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 |