C++ WindowPaintData::brightness方法代码示例

WindowPaintData::WindowPaintData(const WindowPaintData &other)
    : PaintData()
    , quads(other.quads)
    , shader(other.shader)
    , d(new WindowPaintDataPrivate())
{
    setXScale(other.xScale());
    setYScale(other.yScale());
    setZScale(other.zScale());
    translate(other.translation());
    setRotationOrigin(other.rotationOrigin());
    setRotationAxis(other.rotationAxis());
    setRotationAngle(other.rotationAngle());
    setOpacity(other.opacity());
    setDecorationOpacity(other.decorationOpacity());
    setSaturation(other.saturation());
    setBrightness(other.brightness());
}

WindowPaintData::WindowPaintData(const WindowPaintData &other)
    : PaintData()
    , quads(other.quads)
    , shader(other.shader)
    , d(new WindowPaintDataPrivate())
{
    setXScale(other.xScale());
    setYScale(other.yScale());
    setZScale(other.zScale());
    translate(other.translation());
    setRotationOrigin(other.rotationOrigin());
    setRotationAxis(other.rotationAxis());
    setRotationAngle(other.rotationAngle());
    setOpacity(other.opacity());
    setSaturation(other.saturation());
    setBrightness(other.brightness());
    setScreen(other.screen());
    setCrossFadeProgress(other.crossFadeProgress());
    setProjectionMatrix(other.projectionMatrix());
    setModelViewMatrix(other.modelViewMatrix());
    d->screenProjectionMatrix = other.d->screenProjectionMatrix;
}

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.........

//.........这里部分代码省略.........
        // Paint the window contents
        if (!(client && client->isShade())) {
            xcb_render_picture_t clientAlpha = XCB_RENDER_PICTURE_NONE;
            if (!opaque) {
                clientAlpha = xRenderBlendPicture(data.opacity());
            }
            xcb_render_composite(connection(), clientRenderOp, pic, clientAlpha, renderTarget,
                                 cr.x(), cr.y(), 0, 0, dr.x(), dr.y(), dr.width(), dr.height());
            if (data.crossFadeProgress() < 1.0 && data.crossFadeProgress() > 0.0) {
                XRenderWindowPixmap *previous = previousWindowPixmap<XRenderWindowPixmap>();
                if (previous && previous != pixmap) {
                    static XRenderPicture cFadeAlpha(XCB_RENDER_PICTURE_NONE);
                    static xcb_render_color_t cFadeColor = {0, 0, 0, 0};
                    cFadeColor.alpha = uint16_t((1.0 - data.crossFadeProgress()) * 0xffff);
                    if (cFadeAlpha == XCB_RENDER_PICTURE_NONE) {
                        cFadeAlpha = xRenderFill(cFadeColor);
                    } else {
                        xcb_rectangle_t rect = {0, 0, 1, 1};
                        xcb_render_fill_rectangles(connection(), XCB_RENDER_PICT_OP_SRC, cFadeAlpha, cFadeColor , 1, &rect);
                    }
                    if (previous->size() != pixmap->size()) {
                        xcb_render_transform_t xform2 = {
                            DOUBLE_TO_FIXED(FIXED_TO_DOUBLE(xform.matrix11) * previous->size().width() / pixmap->size().width()), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0),
                            DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(FIXED_TO_DOUBLE(xform.matrix22) * previous->size().height() / pixmap->size().height()), DOUBLE_TO_FIXED(0),
                            DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1)
                            };
                        xcb_render_set_picture_transform(connection(), previous->picture(), xform2);
                    }

                    xcb_render_composite(connection(), opaque ? XCB_RENDER_PICT_OP_OVER : XCB_RENDER_PICT_OP_ATOP,
                                         previous->picture(), cFadeAlpha, renderTarget,
                                         cr.x(), cr.y(), 0, 0, dr.x(), dr.y(), dr.width(), dr.height());

                    if (previous->size() != pixmap->size()) {
                        xcb_render_set_picture_transform(connection(), previous->picture(), identity);
                    }
                }
            }
            if (!opaque)
                transformed_shape = QRegion();
        }

        if (client || deleted) {
            if (!noBorder) {
                xcb_render_picture_t decorationAlpha = xRenderBlendPicture(data.opacity());
                auto renderDeco = [decorationAlpha, renderTarget](xcb_render_picture_t deco, const QRect &rect) {
                    if (deco == XCB_RENDER_PICTURE_NONE) {
                        return;
                    }
                    xcb_render_composite(connection(), XCB_RENDER_PICT_OP_OVER, deco, decorationAlpha, renderTarget,
                                         0, 0, 0, 0, rect.x(), rect.y(), rect.width(), rect.height());
                };
                renderDeco(top, dtr);
                renderDeco(left, dlr);
                renderDeco(right, drr);
                renderDeco(bottom, dbr);
            }
        }

        if (data.brightness() != 1.0) {
            // fake brightness change by overlaying black
            const float alpha = (1 - data.brightness()) * data.opacity();
            xcb_rectangle_t rect;
            if (blitInTempPixmap) {
                rect.x = -temp_visibleRect.left();
                rect.y = -temp_visibleRect.top();
                rect.width = width();
                rect.height = height();
            } else {
                rect.x = wr.x();
                rect.y = wr.y();
                rect.width = wr.width();
                rect.height = wr.height();
            }
            xcb_render_fill_rectangles(connection(), XCB_RENDER_PICT_OP_OVER, renderTarget,
                                       preMultiply(data.brightness() < 1.0 ? QColor(0,0,0,255*alpha) : QColor(255,255,255,-alpha*255)),
                                       1, &rect);
        }
        if (blitInTempPixmap) {
            const QRect r = mapToScreen(mask, data, temp_visibleRect);
            xcb_render_set_picture_transform(connection(), *s_tempPicture, xform);
            setPictureFilter(*s_tempPicture, filter);
            xcb_render_composite(connection(), XCB_RENDER_PICT_OP_OVER, *s_tempPicture,
                                 XCB_RENDER_PICTURE_NONE, m_scene->bufferPicture(),
                                 0, 0, 0, 0, r.x(), r.y(), r.width(), r.height());
            xcb_render_set_picture_transform(connection(), *s_tempPicture, identity);
        }
    }
    if (scaled && !blitInTempPixmap) {
        xcb_render_set_picture_transform(connection(), pic, identity);
        if (filter == ImageFilterGood)
            setPictureFilter(pic, KWin::Scene::ImageFilterFast);
        if (!window()->hasAlpha()) {
            const uint32_t values[] = {XCB_RENDER_REPEAT_NONE};
            xcb_render_change_picture(connection(), pic, XCB_RENDER_CP_REPEAT, values);
        }
    }
    if (xRenderOffscreen())
        scene_setXRenderOffscreenTarget(*s_tempPicture);
}