C++ WindowPaintData::setYScale方法代码示例

void Effect::setPositionTransformations(WindowPaintData& data, QRect& region, EffectWindow* w,
                                        const QRect& r, Qt::AspectRatioMode aspect)
{
    QSize size = w->size();
    size.scale(r.size(), aspect);
    data.setXScale(size.width() / double(w->width()));
    data.setYScale(size.height() / double(w->height()));
    int width = int(w->width() * data.xScale());
    int height = int(w->height() * data.yScale());
    int x = r.x() + (r.width() - width) / 2;
    int y = r.y() + (r.height() - height) / 2;
    region = QRect(x, y, width, height);
    data.setXTranslation(x - w->x());
    data.setYTranslation(y - w->y());
}

void ExplosionEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
    // Make sure we have OpenGL compositing and the window is vidible and not a
    //  special window
    bool useshader = (mValid && mWindows.contains(w));
    if (useshader) {
        double maxscaleadd = 1.5f;
        double scale = 1 + maxscaleadd * mWindows[w];
        data.setXScale(scale);
        data.setYScale(scale);
        data.translate(int(w->width() / 2 * (1 - scale)), int(w->height() / 2 * (1 - scale)));
        data.multiplyOpacity(0.99);  // Force blending
        ShaderManager *manager = ShaderManager::instance();
        GLShader *shader = manager->pushShader(ShaderManager::GenericShader);
        QMatrix4x4 screenTransformation = shader->getUniformMatrix4x4("screenTransformation");
        manager->popShader();
        ShaderManager::instance()->pushShader(mShader);
        mShader->setUniform("screenTransformation", screenTransformation);
        mShader->setUniform("factor", (float)mWindows[w]);
        mShader->setUniform("scale", (float)scale);
        mShader->setUniform("windowSize", QVector2D(w->width(), w->height()));
        glActiveTexture(GL_TEXTURE4);
        mStartOffsetTex->bind();
        glActiveTexture(GL_TEXTURE5);
        mEndOffsetTex->bind();
        glActiveTexture(GL_TEXTURE0);
        data.shader = mShader;
    }

    // Call the next effect.
    effects->paintWindow(w, mask, region, data);

    if (useshader) {
        ShaderManager::instance()->popShader();
        glActiveTexture(GL_TEXTURE4);
        mStartOffsetTex->unbind();
        glActiveTexture(GL_TEXTURE5);
        mEndOffsetTex->unbind();
        glActiveTexture(GL_TEXTURE0);
    }
}

void LanczosFilter::performPaint(EffectWindowImpl* w, int mask, QRegion region, WindowPaintData& data)
{
    if (effects->compositingType() == KWin::OpenGLCompositing && (data.xScale() < 0.9 || data.yScale() < 0.9) &&
            KGlobalSettings::graphicEffectsLevel() & KGlobalSettings::SimpleAnimationEffects) {
        if (!m_inited)
            init();
        const QRect screenRect = Workspace::self()->clientArea(ScreenArea, w->screen(), w->desktop());
        // window geometry may not be bigger than screen geometry to fit into the FBO
        if (m_shader && w->width() <= screenRect.width() && w->height() <= screenRect.height()) {
            double left = 0;
            double top = 0;
            double right = w->width();
            double bottom = w->height();
            foreach (const WindowQuad & quad, data.quads) {
                // we need this loop to include the decoration padding
                left   = qMin(left, quad.left());
                top    = qMin(top, quad.top());
                right  = qMax(right, quad.right());
                bottom = qMax(bottom, quad.bottom());
            }
            double width = right - left;
            double height = bottom - top;
            if (width > screenRect.width() || height > screenRect.height()) {
                // window with padding does not fit into the framebuffer
                // so cut of the shadow
                left = 0;
                top = 0;
                width = w->width();
                height = w->height();
            }
            int tx = data.xTranslation() + w->x() + left * data.xScale();
            int ty = data.yTranslation() + w->y() + top * data.yScale();
            int tw = width * data.xScale();
            int th = height * data.yScale();
            const QRect textureRect(tx, ty, tw, th);
            const bool hardwareClipping = !(QRegion(textureRect)-region).isEmpty();

            int sw = width;
            int sh = height;

            GLTexture *cachedTexture = static_cast< GLTexture*>(w->data(LanczosCacheRole).value<void*>());
            if (cachedTexture) {
                if (cachedTexture->width() == tw && cachedTexture->height() == th) {
                    cachedTexture->bind();
                    if (hardwareClipping) {
                        glEnable(GL_SCISSOR_TEST);
                    }
                    if (ShaderManager::instance()->isValid()) {
                        glEnable(GL_BLEND);
                        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

                        const qreal rgb = data.brightness() * data.opacity();
                        const qreal a = data.opacity();

                        GLShader *shader = ShaderManager::instance()->pushShader(ShaderManager::SimpleShader);
                        shader->setUniform(GLShader::Offset, QVector2D(0, 0));
                        shader->setUniform(GLShader::ModulationConstant, QVector4D(rgb, rgb, rgb, a));
                        shader->setUniform(GLShader::Saturation, data.saturation());
                        shader->setUniform(GLShader::AlphaToOne, 0);

                        cachedTexture->render(region, textureRect, hardwareClipping);

                        ShaderManager::instance()->popShader();
                        glDisable(GL_BLEND);
                    } else {
                        prepareRenderStates(cachedTexture, data.opacity(), data.brightness(), data.saturation());
                        cachedTexture->render(region, textureRect, hardwareClipping);
                        restoreRenderStates(cachedTexture, data.opacity(), data.brightness(), data.saturation());
                    }
                    if (hardwareClipping) {
                        glDisable(GL_SCISSOR_TEST);
                    }
                    cachedTexture->unbind();
                    m_timer.start(5000, this);
                    return;
                } else {
                    // offscreen texture not matching - delete
                    delete cachedTexture;
                    cachedTexture = 0;
                    w->setData(LanczosCacheRole, QVariant());
                }
            }

            WindowPaintData thumbData = data;
            thumbData.setXScale(1.0);
            thumbData.setYScale(1.0);
            thumbData.setXTranslation(-w->x() - left);
            thumbData.setYTranslation(-w->y() - top);
            thumbData.setBrightness(1.0);
            thumbData.setOpacity(1.0);
            thumbData.setSaturation(1.0);

            // Bind the offscreen FBO and draw the window on it unscaled
            updateOffscreenSurfaces();
            GLRenderTarget::pushRenderTarget(m_offscreenTarget);

            glClearColor(0.0, 0.0, 0.0, 0.0);
            glClear(GL_COLOR_BUFFER_BIT);
            w->sceneWindow()->performPaint(mask, infiniteRegion(), thumbData);

//.........这里部分代码省略.........