C++ WindowPaintData::setOpacity方法代码示例

void LogoutEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
    if (progress > 0.0) {
        if (effects->compositingType() == KWin::OpenGLCompositing) {
            // In OpenGL mode we add vignetting and, if supported, a slight blur
            if (blurSupported) {
                // When using blur we render everything to an FBO and as such don't do the vignetting
                // until after we render the FBO to the screen.
                if (w == logoutWindow) {
                    // Window is rendered after the FBO
                    windowOpacity = data.opacity();
                    data.setOpacity(0.0); // Cheat, we need the opacity for later but don't want to blur it
                } else {
                    if (logoutWindowPassed || ignoredWindows.contains(w)) {
                        // Window is rendered after the FBO
                        windows.append(w);
                        windowsOpacities[ w ] = data.opacity();
                        data.setOpacity(0.0);
                    } else // Window is added to the FBO
                        data.multiplySaturation((1.0 - progress * 0.2));
                }
            } else {
                // If we are not blurring then we are not rendering to an FBO
                if (w == logoutWindow)
                    // This is the logout window don't alter it but render our vignetting now
                    renderVignetting();
                else if (!logoutWindowPassed && !ignoredWindows.contains(w))
                    // Window is in the background, desaturate
                    data.multiplySaturation((1.0 - progress * 0.2));
                // All other windows are unaltered
            }
        }
        if (effects->compositingType() == KWin::XRenderCompositing) {
            // Since we can't do vignetting in XRender just do a stronger desaturation and darken
            if (w != logoutWindow && !logoutWindowPassed && !ignoredWindows.contains(w)) {
                data.multiplySaturation((1.0 - progress * 0.8));
                data.multiplyBrightness((1.0 - progress * 0.3));
            }
        }
        if (w == logoutWindow ||
                ignoredWindows.contains(w))   // HACK: All windows past the first ignored one should not be
            //       blurred as it affects the stacking order.
            // All following windows are on top of the logout window and should not be altered either
            logoutWindowPassed = true;
    }
    effects->paintWindow(w, mask, region, data);
}

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.........