C++ WindowPaintData::xTranslation方法代码示例

void BlurEffect::drawWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
{
    const QRect screen = effects->virtualScreenGeometry();
    if (shouldBlur(w, mask, data)) {
        QRegion shape = region & blurRegion(w).translated(w->pos()) & screen;

        const bool translated = data.xTranslation() || data.yTranslation();
        // let's do the evil parts - someone wants to blur behind a transformed window
        if (translated) {
            shape = shape.translated(data.xTranslation(), data.yTranslation());
            shape = shape & region;
        }

        if (!shape.isEmpty()) {
            if (m_shouldCache && !translated) {
                doCachedBlur(w, region, data.opacity());
            } else {
                doBlur(shape, screen, data.opacity());
            }
        }
    }

    // Draw the window over the blurred area
    effects->drawWindow(w, mask, region, data);
}

bool BlurEffect::shouldBlur(const EffectWindow *w, int mask, const WindowPaintData &data) const
{
    if (!target->valid() || !shader || !shader->isValid())
        return false;

    if (effects->activeFullScreenEffect() && !w->data(WindowForceBlurRole).toBool())
        return false;

    if (w->isDesktop())
        return false;

    bool scaled = !qFuzzyCompare(data.xScale(), 1.0) && !qFuzzyCompare(data.yScale(), 1.0);
    bool translated = data.xTranslation() || data.yTranslation();

    if (scaled || ((translated || (mask & PAINT_WINDOW_TRANSFORMED)) && !w->data(WindowForceBlurRole).toBool()))
        return false;

    bool blurBehindDecos = effects->decorationsHaveAlpha() &&
                effects->decorationSupportsBlurBehind();

    if (!w->hasAlpha() && !(blurBehindDecos && w->hasDecoration()))
        return false;

    return true;
}

// Maps window coordinates to screen coordinates
QRect SceneXrender::Window::mapToScreen(int mask, const WindowPaintData &data, const QRect &rect) const
{
    QRect r = rect;

    if (mask & PAINT_WINDOW_TRANSFORMED) {
        // Apply the window transformation
        r.moveTo(r.x() * data.xScale() + data.xTranslation(),
                 r.y() * data.yScale() + data.yTranslation());
        r.setWidth(r.width() * data.xScale());
        r.setHeight(r.height() * data.yScale());
    }

    // Move the rectangle to the screen position
    r.translate(x(), y());

    if (mask & PAINT_SCREEN_TRANSFORMED) {
        // Apply the screen transformation
        r.moveTo(r.x() * screen_paint.xScale() + screen_paint.xTranslation(),
                 r.y() * screen_paint.yScale() + screen_paint.yTranslation());
        r.setWidth(r.width() * screen_paint.xScale());
        r.setHeight(r.height() * screen_paint.yScale());
    }

    return r;
}

void TaskbarThumbnailEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
    effects->paintWindow(w, mask, region, data);   // paint window first
    if (thumbnails.contains(w)) {
        // paint thumbnails on it
        int mask = PAINT_WINDOW_TRANSFORMED;
        if (data.opacity() == 1.0)
            mask |= PAINT_WINDOW_OPAQUE;
        else
            mask |= PAINT_WINDOW_TRANSLUCENT;
        mask |= PAINT_WINDOW_LANCZOS;
        foreach (const Data & thumb, thumbnails.values(w)) {
            EffectWindow* thumbw = effects->findWindow(thumb.window);
            if (thumbw == NULL)
                continue;
            WindowPaintData thumbData(thumbw);
            thumbData.multiplyOpacity(data.opacity());
            QRect r, thumbRect(thumb.rect);
            thumbRect.translate(w->pos() + QPoint(data.xTranslation(), data.yTranslation()));
            thumbRect.setSize(QSize(thumbRect.width() * data.xScale(), thumbRect.height() * data.yScale())); // QSize has no vector multiplicator... :-(

            if (effects->isOpenGLCompositing()) {
                if (data.shader) {
                    thumbData.shader = data.shader;
                }
            } // if ( effects->compositingType() == KWin::OpenGLCompositing )
            setPositionTransformations(thumbData, r, thumbw, thumbRect, Qt::KeepAspectRatio);
            effects->drawWindow(thumbw, mask, r, thumbData);
        }
    }

// Maps window coordinates to screen coordinates
QPoint SceneXrender::Window::mapToScreen(int mask, const WindowPaintData &data, const QPoint &point) const
{
    QPoint pt = point;

    if (mask & PAINT_WINDOW_TRANSFORMED) {
        // Apply the window transformation
        pt.rx() = pt.x() * data.xScale() + data.xTranslation();
        pt.ry() = pt.y() * data.yScale() + data.yTranslation();
    }

    // Move the point to the screen position
    pt += QPoint(x(), y());

    if (mask & PAINT_SCREEN_TRANSFORMED) {
        // Apply the screen transformation
        pt.rx() = pt.x() * screen_paint.xScale() + screen_paint.xTranslation();
        pt.ry() = pt.y() * screen_paint.yScale() + screen_paint.yTranslation();
    }

    return pt;
}

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.........