C++ WindowPaintData::crossFadeProgress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());
    setScreen(other.screen());
    setCrossFadeProgress(other.crossFadeProgress());
}

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;
}

//.........这里部分代码省略.........
    if (mask & PAINT_SCREEN_TRANSFORMED) {
        xscale *= screen_paint.xScale();
        yscale *= screen_paint.yScale();
    }
    if (!qFuzzyCompare(xscale, 1.0) || !qFuzzyCompare(yscale, 1.0)) {
        scaled = true;
        xform.matrix11 = DOUBLE_TO_FIXED(1.0 / xscale);
        xform.matrix22 = DOUBLE_TO_FIXED(1.0 / yscale);

        // transform the shape for clipping in paintTransformedScreen()
        QVector<QRect> rects = transformed_shape.rects();
        for (int i = 0; i < rects.count(); ++i) {
            QRect& r = rects[ i ];
            r.setRect(qRound(r.x() * xscale), qRound(r.y() * yscale),
                      qRound(r.width() * xscale), qRound(r.height() * yscale));
        }
        transformed_shape.setRects(rects.constData(), rects.count());
    }

    transformed_shape.translate(mapToScreen(mask, data, QPoint(0, 0)));
    PaintClipper pcreg(region);   // clip by the region to paint
    PaintClipper pc(transformed_shape);   // clip by window's shape

    const bool wantShadow = m_shadow && !m_shadow->shadowRegion().isEmpty();

    // In order to obtain a pixel perfect rescaling
    // we need to blit the window content togheter with
    // decorations in a temporary pixmap and scale
    // the temporary pixmap at the end.
    // We should do this only if there is scaling and
    // the window has border
    // This solves a number of glitches and on top of this
    // it optimizes painting quite a bit
    const bool blitInTempPixmap = xRenderOffscreen() || (data.crossFadeProgress() < 1.0 && !opaque) ||
                                 (scaled && (wantShadow || (client && !client->noBorder()) || (deleted && !deleted->noBorder())));

    xcb_render_picture_t renderTarget = m_scene->bufferPicture();
    if (blitInTempPixmap) {
        if (scene_xRenderOffscreenTarget()) {
            temp_visibleRect = toplevel->visibleRect().translated(-toplevel->pos());
            renderTarget = *scene_xRenderOffscreenTarget();
        } else {
            prepareTempPixmap();
            renderTarget = *s_tempPicture;
        }
    } else {
        xcb_render_set_picture_transform(connection(), pic, xform);
        if (filter == ImageFilterGood) {
            setPictureFilter(pic, KWin::Scene::ImageFilterGood);
        }

        //BEGIN OF STUPID RADEON HACK
        // This is needed to avoid hitting a fallback in the radeon driver.
        // The Render specification states that sampling pixels outside the
        // source picture results in alpha=0 pixels. This can be achieved by
        // setting the border color to transparent black, but since the border
        // color has the same format as the texture, it only works when the
        // texture has an alpha channel. So the driver falls back to software
        // when the repeat mode is RepeatNone, the picture has a non-identity
        // transformation matrix, and doesn't have an alpha channel.
        // Since we only scale the picture, we can work around this by setting
        // the repeat mode to RepeatPad.
        if (!window()->hasAlpha()) {
            const uint32_t values[] = {XCB_RENDER_REPEAT_PAD};
            xcb_render_change_picture(connection(), pic, XCB_RENDER_CP_REPEAT, values);
        }