示例#1
0
void AxisRenderer::render(const AxisCamera &camera, QGLShaderProgram &program, QGLBuffer &vertBuffer, QGLBuffer &indexBuffer, bool selected)
{
    qDebug()<<"[AxisRender] start of render";

    initializeGLFunctions();

    //bind the program for use
    if(!program.bind()){
        QMessageBox::critical(0, "Error", "Could not bind program for use");
        qFatal("Could not bind program for use");
    }

    qDebug()<<"[AxisRender] Drawing";

    //set up shader locations
    program.bind();
    GLint vertLoc = program.attributeLocation("vertex");
    Q_ASSERT(vertLoc != -1);
    GLint colorLoc = program.uniformLocation("color");
    Q_ASSERT(colorLoc != -1);
    GLint mvpLoc = program.uniformLocation("modelToCamera");
    Q_ASSERT(mvpLoc != -1);

    //set default color to a cyan
    QVector4D color(0.0f, .5f, 1.0f, 1.0f);

    //modify the color for selected geometry
    if(selected){
        qDebug()<<"[AxisRender] adding selection color";
        color = color + QVector4D(1.0f, 0.0f, 0.0f, 0.0f);
    }

    //set the uniform values
    program.setUniformValueArray(colorLoc, &color, 1);
    program.setUniformValueArray(mvpLoc, &camera.getProjMatrix(), 1);

    //bind and set the vertex buffer for attribute
    vertBuffer.bind();
    program.enableAttributeArray(vertLoc);
    program.setAttributeBuffer(vertLoc, GL_FLOAT, 0, 4);

    //bind the index buffer for the draw call
    indexBuffer.bind();

    qDebug()<<"[AxisRender] Drawing";

    //draw the index buffer NOTE: Hard set to 24 values for a box!
    glDrawElements(GL_LINES, 24, GL_UNSIGNED_INT, NULL);
}
示例#2
0
void AxisRenderer::drawCamLine(QVector3D from, QVector3D to, QGLShaderProgram &program, const AxisCamera &camera)
{
    const GLfloat color[] ={1.0f, 0.0f, 0.0f, 1.0f}; //default red color

    //temp vector to hold line verticies
    std::vector<GLfloat> bufferData;

    //from verticies
    bufferData.push_back(from.x());
    bufferData.push_back(from.y());
    bufferData.push_back(from.z());
    bufferData.push_back(1.0f);

    //to verticies
    bufferData.push_back(to.x());
    bufferData.push_back(to.y());
    bufferData.push_back(to.z());
    bufferData.push_back(1.0f);

    program.bind();

    //create and fill line buffer with verticies
    QGLBuffer line(QGLBuffer::VertexBuffer);
    line.create();
    line.bind();
    line.allocate(bufferData.data(), sizeof(GLfloat) * 8);

    //get locations
    GLuint colorLoc = program.uniformLocation("color");
    Q_ASSERT(colorLoc != -1);
    GLuint mvpLoc = program.uniformLocation("modelToCamera");
    Q_ASSERT(mvpLoc != -1);

    //setup line for drawing
    line.bind();
    program.enableAttributeArray("vertex");
    program.setAttributeBuffer("vertex", GL_FLOAT, 0, 4);
    program.setUniformValueArray(colorLoc, color, 1, 4);
    program.setUniformValueArray(mvpLoc, &(camera.getProjMatrix()), 1);

    glDrawArrays(GL_LINES, 0, 2);
}
/*!
  Draw the particle, if effect was given in the constructor, we set the
  diffuse value for the shader in order to color the particle as same
  as the ball that hit the particle.
*/
void ExplosionParticle::draw(QGLPainter *painter)
{
    if (userEffect()) {
        QGLShaderProgram *program =
                static_cast<QGLShaderProgramEffect*>(userEffect())->program();

        if (m_DiffuseLoc == -1) {
            m_DiffuseLoc = program->uniformLocation("diffuse");
        }

        program->setUniformValue(m_DiffuseLoc, material()->diffuseColor());

        QGLSceneNode::draw(painter);

        program->setUniformValue(m_DiffuseLoc,
                                 QVector4D(1.0f, 1.0f, 1.0f, 1.0f));
    }
    else {
        QGLSceneNode::draw(painter);
    }
}
bool GLWidgetRendererPrivate::prepareShaderProgram(const VideoFormat &fmt, ColorTransform::ColorSpace cs)
{
    // isSupported(pixfmt)
    if (!fmt.isValid())
        return false;
    releaseShaderProgram();
    video_format.setPixelFormatFFmpeg(fmt.pixelFormatFFmpeg());
    colorTransform.setInputColorSpace(cs);
    // TODO: only to kinds, packed.glsl, planar.glsl
    QString frag;
    if (fmt.isPlanar()) {
        frag = getShaderFromFile("shaders/planar.f.glsl");
    } else {
        frag = getShaderFromFile("shaders/rgb.f.glsl");
    }
    if (frag.isEmpty())
        return false;
    if (fmt.isRGB()) {
        frag.prepend("#define INPUT_RGB\n");
    } else {
        frag.prepend(QString("#define YUV%1P\n").arg(fmt.bitsPerPixel(0)));
    }
    if (fmt.isPlanar() && fmt.bytesPerPixel(0) == 2) {
        if (fmt.isBigEndian())
            frag.prepend("#define LA_16BITS_BE\n");
        else
            frag.prepend("#define LA_16BITS_LE\n");
    }
    if (cs == ColorTransform::BT601) {
        frag.prepend("#define CS_BT601\n");
    } else if (cs == ColorTransform::BT709) {
        frag.prepend("#define CS_BT709\n");
    }
#if NO_QGL_SHADER
    program = createProgram(kVertexShader, frag.toUtf8().constData());
    if (!program) {
        qWarning("Could not create shader program.");
        return false;
    }
    // vertex shader. we can set attribute locations calling glBindAttribLocation
    a_Position = glGetAttribLocation(program, "a_Position");
    a_TexCoords = glGetAttribLocation(program, "a_TexCoords");
    u_matrix = glGetUniformLocation(program, "u_MVP_matrix");
    u_bpp = glGetUniformLocation(program, "u_bpp");
    u_opacity = glGetUniformLocation(program, "u_opacity");
    // fragment shader
    u_colorMatrix = glGetUniformLocation(program, "u_colorMatrix");
#else
    if (!shader_program->addShaderFromSourceCode(QGLShader::Vertex, kVertexShader)) {
        qWarning("Failed to add vertex shader: %s", shader_program->log().toUtf8().constData());
        return false;
    }
    if (!shader_program->addShaderFromSourceCode(QGLShader::Fragment, frag)) {
        qWarning("Failed to add fragment shader: %s", shader_program->log().toUtf8().constData());
        return false;
    }
    if (!shader_program->link()) {
        qWarning("Failed to link shader program...%s", shader_program->log().toUtf8().constData());
        return false;
    }
    // vertex shader
    a_Position = shader_program->attributeLocation("a_Position");
    a_TexCoords = shader_program->attributeLocation("a_TexCoords");
    u_matrix = shader_program->uniformLocation("u_MVP_matrix");
    u_bpp = shader_program->uniformLocation("u_bpp");
    u_opacity = shader_program->uniformLocation("u_opacity");
    // fragment shader
    u_colorMatrix = shader_program->uniformLocation("u_colorMatrix");
#endif //NO_QGL_SHADER
    qDebug("glGetAttribLocation(\"a_Position\") = %d\n", a_Position);
    qDebug("glGetAttribLocation(\"a_TexCoords\") = %d\n", a_TexCoords);
    qDebug("glGetUniformLocation(\"u_MVP_matrix\") = %d\n", u_matrix);
    qDebug("glGetUniformLocation(\"u_bpp\") = %d\n", u_bpp);
    qDebug("glGetUniformLocation(\"u_opacity\") = %d\n", u_opacity);
    qDebug("glGetUniformLocation(\"u_colorMatrix\") = %d\n", u_colorMatrix);

    if (fmt.isRGB())
        u_Texture.resize(1);
    else
        u_Texture.resize(fmt.channels());
    for (int i = 0; i < u_Texture.size(); ++i) {
        QString tex_var = QString("u_Texture%1").arg(i);
#if NO_QGL_SHADER
        u_Texture[i] = glGetUniformLocation(program, tex_var.toUtf8().constData());
#else
        u_Texture[i] = shader_program->uniformLocation(tex_var);
#endif
        qDebug("glGetUniformLocation(\"%s\") = %d\n", tex_var.toUtf8().constData(), u_Texture[i]);
    }
    return true;
}
/*!
    \reimp
*/
void QGLPerVertexColorEffect::setActive(QGLPainter *painter, bool flag)
{
#if defined(QGL_FIXED_FUNCTION_ONLY)
    Q_UNUSED(painter);
    if (flag) {
        glEnableClientState(GL_VERTEX_ARRAY);
        glEnableClientState(GL_COLOR_ARRAY);
    } else {
        glDisableClientState(GL_VERTEX_ARRAY);
        glDisableClientState(GL_COLOR_ARRAY);
    }
#else
    Q_UNUSED(painter);
    Q_D(QGLPerVertexColorEffect);
#if !defined(QGL_SHADERS_ONLY)
    if (painter->isFixedFunction()) {
        d->isFixedFunction = true;
        if (flag) {
            glEnableClientState(GL_VERTEX_ARRAY);
            glEnableClientState(GL_COLOR_ARRAY);
        } else {
            glDisableClientState(GL_VERTEX_ARRAY);
            glDisableClientState(GL_COLOR_ARRAY);
        }
        return;
    }
#endif
    static char const pvColorVertexShader[] =
        "attribute highp vec4 vertex;\n"
        "attribute mediump vec4 color;\n"
        "uniform highp mat4 matrix;\n"
        "varying mediump vec4 qColor;\n"
        "void main(void)\n"
        "{\n"
        "    gl_Position = matrix * vertex;\n"
        "    qColor = color;\n"
        "}\n";

    static char const pvColorFragmentShader[] =
        "varying mediump vec4 qColor;\n"
        "void main(void)\n"
        "{\n"
        "    gl_FragColor = qColor;\n"
        "}\n";

    QGLShaderProgram *program =
        painter->cachedProgram(QLatin1String("qt.color.pervertex"));
    d->program = program;
    if (!program) {
        if (!flag)
            return;
        program = new QGLShaderProgram();
        program->addShaderFromSourceCode(QGLShader::Vertex, pvColorVertexShader);
        program->addShaderFromSourceCode(QGLShader::Fragment, pvColorFragmentShader);
        program->bindAttributeLocation("vertex", QGL::Position);
        program->bindAttributeLocation("color", QGL::Color);
        if (!program->link()) {
            qWarning("QGLPerVertexColorEffect::setActive(): could not link shader program");
            delete program;
            program = 0;
            return;
        }
        painter->setCachedProgram(QLatin1String("qt.color.pervertex"), program);
        d->program = program;
        d->matrixUniform = program->uniformLocation("matrix");
        program->bind();
        program->enableAttributeArray(QGL::Position);
        program->enableAttributeArray(QGL::Color);
    } else if (flag) {
        d->matrixUniform = program->uniformLocation("matrix");
        program->bind();
        program->enableAttributeArray(QGL::Position);
        program->enableAttributeArray(QGL::Color);
    } else {
        program->disableAttributeArray(QGL::Position);
        program->disableAttributeArray(QGL::Color);
        program->release();
    }
#endif
}
示例#6
0
void AxisRenderer::renderOrigin(QGLShaderProgram &program, const AxisCamera &camera)
{
    qDebug()<<"[AxisRender] drawing origin lines";
    initializeGLFunctions();

    //data for the xline
    const GLfloat xline[] = {
        0.0f, 0.0f, 0.0f, 1.0f,
        5.0f, 0.0f, 0.0f, 1.0f
    };

    //data for the yline
    const GLfloat yline[] = {
        0.0f, 0.0f, 0.0f, 1.0f,
        0.0f, 5.0f, 0.0f, 1.0f
    };

    //data for the zline
    const GLfloat zline[] = {
        0.0f, 0.0f, 0.0f, 1.0f,
        0.0f, 0.0f, 5.0f, 1.0f
    };

    //data for each line color
    const GLfloat xcolor[] = { 1.0f, 0.0f, 0.0f, 1.0f};
    const GLfloat ycolor[] = { 0.0f, 1.0f, 0.0f, 1.0f};
    const GLfloat zcolor[] = { 1.0f, 0.0f, 1.0f, 1.0f};

    //fill buffer for xline
    QGLBuffer xbuff(QGLBuffer::VertexBuffer);
    xbuff.create();
    xbuff.bind();
    xbuff.setUsagePattern(QGLBuffer::StaticDraw);
    xbuff.allocate(xline, sizeof(xline));

    //fill buffer for yline
    QGLBuffer ybuff(QGLBuffer::VertexBuffer);
    ybuff.create();
    ybuff.bind();
    ybuff.setUsagePattern(QGLBuffer::StaticDraw);
    ybuff.allocate(yline, sizeof(yline));

    //fill buffer for zline
    QGLBuffer zbuff(QGLBuffer::VertexBuffer);
    zbuff.create();
    zbuff.bind();
    zbuff.setUsagePattern(QGLBuffer::StaticDraw);
    zbuff.allocate(zline, sizeof(zline));

    program.bind();

    //set the uniforms
    GLuint colorLoc = program.uniformLocation("color");
    Q_ASSERT(colorLoc != -1);
    GLuint mvpLoc = program.uniformLocation("modelToCamera");
    Q_ASSERT(mvpLoc != -1);
    program.setUniformValueArray(mvpLoc, &(camera.getProjMatrix()), 1);

    //bind then draw xline
    xbuff.bind();
    program.enableAttributeArray("vertex");
    program.setAttributeBuffer("vertex", GL_FLOAT, 0, 4);
    program.setUniformValueArray(colorLoc, xcolor, 1, 4);

    glDrawArrays(GL_LINES, 0, 2);

    //bind then draw yline
    ybuff.bind();
    program.setAttributeBuffer("vertex", GL_FLOAT, 0, 4);
    program.setUniformValueArray(colorLoc, ycolor, 1, 4);

    glDrawArrays(GL_LINES, 0, 2);

    //bind then draw zline
    zbuff.bind();
    program.setAttributeBuffer("vertex", GL_FLOAT, 0, 4);
    program.setUniformValueArray(colorLoc, zcolor, 1, 4);

    glDrawArrays(GL_LINES, 0, 2);

    //destroy the buffers(Probably should be created and stored for longer than one call but context issue)
    xbuff.bind();
    xbuff.destroy();

    ybuff.bind();
    ybuff.destroy();

    zbuff.bind();
    zbuff.destroy();

}