Method paintGL

piomxtextures_src/glwidget.cpp:206–247

    return eglImage;
}
void GLWidget::paintGL()
{
    qglClearColor(clearColor);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

#if !defined(QT_OPENGL_ES_2)

    glLoadIdentity();
    glTranslatef(0.0f, 0.0f, -10.0f);
    glRotatef(xRot / 16.0f, 1.0f, 0.0f, 0.0f);
    glRotatef(yRot / 16.0f, 0.0f, 1.0f, 0.0f);
    glRotatef(zRot / 16.0f, 0.0f, 0.0f, 1.0f);

    glVertexPointer(3, GL_FLOAT, 0, vertices.constData());
    glTexCoordPointer(2, GL_FLOAT, 0, texCoords.constData());
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

#else

    QMatrix4x4 m;
    m.ortho(-0.5f, +0.5f, +0.5f, -0.5f, 4.0f, 15.0f);
    m.translate(0.0f, 0.0f, -10.0f);
    m.rotate(xRot / 16.0f, 1.0f, 0.0f, 0.0f);
    m.rotate(yRot / 16.0f, 0.0f, 1.0f, 0.0f);
    m.rotate(zRot / 16.0f, 0.0f, 0.0f, 1.0f);

    program->setUniformValue("matrix", m);
    program->enableAttributeArray(PROGRAM_VERTEX_ATTRIBUTE);
    program->enableAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE);
    program->setAttributeArray
        (PROGRAM_VERTEX_ATTRIBUTE, vertices.constData());
    program->setAttributeArray
        (PROGRAM_TEXCOORD_ATTRIBUTE, texCoords.constData());

#endif

    for (int i = 0; i < 6; ++i) {
        glBindTexture(GL_TEXTURE_2D, textures[i]);
        glDrawArrays(GL_TRIANGLE_FAN, i * 4, 4);
    }
}

void GLWidget::resizeGL(int width, int height)
{