1 /****************************************************************************

     2 **

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

     4 ** All rights reserved.

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

     6 **

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

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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

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

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

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

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

    30 **

    31 **

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    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 //! [0]

    43 QGLShader shader(QGLShader::VertexShader);

    44 shader.compile(code);

    45 

    46 QGLShaderProgram program(context);

    47 program.addShader(shader);

    48 program.link();

    49 

    50 program.enable();

    51 //! [0]

    52 

    53 //! [1]

    54 program.addShader(QGLShader::VertexShader,

    55     "attribute highp vec4 vertex;\n"

    56     "attribute mediump mat4 matrix;\n"

    57     "void main(void)\n"

    58     "{\n"

    59     "   gl_Position = matrix * vertex;\n"

    60     "}");

    61 program.addShader(QGLShader::FragmentShader,

    62     "uniform mediump vec4 color;\n"

    63     "void main(void)\n"

    64     "{\n"

    65     "   gl_FragColor = color;\n"

    66     "}");

    67 program.link();

    68 program.enable();

    69 

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

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

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

    73 //! [1]

    74 

    75 //! [2]

    76 static GLfloat const triangleVertices[] = {

    77     60.0f,  10.0f,  0.0f,

    78     110.0f, 110.0f, 0.0f,

    79     10.0f,  110.0f, 0.0f

    80 };

    81 

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

    83 

    84 QMatrix4x4 pmvMatrix;

    85 pmvMatrix.ortho(rect());

    86 

    87 program.setAttributeArray(vertexLocation, triangleVertices, 3);

    88 program.setUniformValue(matrixLocation, pmvMatrix);

    89 program.setUniformValue(colorLocation, color);

    90 

    91 glDrawArrays(GL_TRIANGLES, 0, 3);

    92 //! [2]