/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the documentation of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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, 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.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

//! [0]

QGLShader shader(QGLShader::VertexShader);

shader.compile(code);

QGLShaderProgram program(context);

program.addShader(shader);

program.link();

program.enable();

//! [0]

//! [1]

program.addShader(QGLShader::VertexShader,

    "attribute highp vec4 vertex;\n"

    "attribute mediump mat4 matrix;\n"

    "void main(void)\n"

    "{\n"

    "   gl_Position = matrix * vertex;\n"

    "}");

program.addShader(QGLShader::FragmentShader,

    "uniform mediump vec4 color;\n"

    "void main(void)\n"

    "{\n"

    "   gl_FragColor = color;\n"

    "}");

program.link();

program.enable();

int vertexLocation = program.attributeLocation("vertex");

int matrixLocation = program.attributeLocation("matrix");

int colorLocation = program.uniformLocation("color");

//! [1]

//! [2]

static GLfloat const triangleVertices[] = {

    60.0f,  10.0f,  0.0f,

    110.0f, 110.0f, 0.0f,

    10.0f,  110.0f, 0.0f

};

QColor color(0, 255, 0, 255);

QMatrix4x4 pmvMatrix;

pmvMatrix.ortho(rect());

program.setAttributeArray(vertexLocation, triangleVertices, 3);

program.setUniformValue(matrixLocation, pmvMatrix);

program.setUniformValue(colorLocation, color);

glDrawArrays(GL_TRIANGLES, 0, 3);

//! [2]