Exemplo n.º 1
0
void CCDamageTracker::extendDamageForRenderSurface(CCLayerImpl* layer, FloatRect& targetDamageRect)
{
    // There are two ways a "descendant surface" can damage regions of the "target surface":
    //   1. Property change:
    //        - a surface's geometry can change because of
    //            - changes to descendants (i.e. the subtree) that affect the surface's content rect
    //            - changes to ancestor layers that propagate their property changes to their entire subtree.
    //        - just like layers, both the old surface rect and new surface rect will
    //          damage the target surface in this case.
    //
    //   2. Damage rect: This surface may have been damaged by its own layerList as well, and that damage
    //      should propagate to the target surface.
    //

    CCRenderSurface* renderSurface = layer->renderSurface();

    bool surfaceIsNew = false;
    FloatRect oldSurfaceRect = removeRectFromCurrentFrame(layer->id(), surfaceIsNew);

    FloatRect surfaceRectInTargetSpace = renderSurface->drawableContentRect(); // already includes replica if it exists.
    saveRectForNextFrame(layer->id(), surfaceRectInTargetSpace);

    FloatRect damageRectInLocalSpace;
    if (surfaceIsNew || renderSurface->surfacePropertyChanged() || layer->layerSurfacePropertyChanged()) {
        // The entire surface contributes damage.
        damageRectInLocalSpace = renderSurface->contentRect();

        // The surface's old region is now exposed on the target surface, too.
        targetDamageRect.uniteIfNonZero(oldSurfaceRect);
    } else {
        // Only the surface's damageRect will damage the target surface.
        damageRectInLocalSpace = renderSurface->damageTracker()->currentDamageRect();
    }

    // If there was damage, transform it to target space, and possibly contribute its reflection if needed.
    if (!damageRectInLocalSpace.isEmpty()) {
        const WebTransformationMatrix& drawTransform = renderSurface->drawTransform();
        FloatRect damageRectInTargetSpace = CCMathUtil::mapClippedRect(drawTransform, damageRectInLocalSpace);
        targetDamageRect.uniteIfNonZero(damageRectInTargetSpace);

        if (layer->replicaLayer()) {
            const WebTransformationMatrix& replicaDrawTransform = renderSurface->replicaDrawTransform();
            targetDamageRect.uniteIfNonZero(CCMathUtil::mapClippedRect(replicaDrawTransform, damageRectInLocalSpace));
        }
    }

    // If there was damage on the replica's mask, then the target surface receives that damage as well.
    if (layer->replicaLayer() && layer->replicaLayer()->maskLayer()) {
        CCLayerImpl* replicaMaskLayer = layer->replicaLayer()->maskLayer();

        bool replicaIsNew = false;
        removeRectFromCurrentFrame(replicaMaskLayer->id(), replicaIsNew);

        const WebTransformationMatrix& replicaDrawTransform = renderSurface->replicaDrawTransform();
        FloatRect replicaMaskLayerRect = CCMathUtil::mapClippedRect(replicaDrawTransform, FloatRect(FloatPoint::zero(), FloatSize(replicaMaskLayer->bounds().width(), replicaMaskLayer->bounds().height())));
        saveRectForNextFrame(replicaMaskLayer->id(), replicaMaskLayerRect);

        // In the current implementation, a change in the replica mask damages the entire replica region.
        if (replicaIsNew || replicaMaskLayer->layerPropertyChanged() || !replicaMaskLayer->updateRect().isEmpty())
            targetDamageRect.uniteIfNonZero(replicaMaskLayerRect);
    }

    // If the layer has a background filter, this may cause pixels in our surface to be expanded, so we will need to expand any damage
    // at or below this layer. We expand the damage from this layer too, as we need to readback those pixels from the surface with only
    // the contents of layers below this one in them. This means we need to redraw any pixels in the surface being used for the blur in
    // this layer this frame.
    if (layer->backgroundFilters().hasFilterThatMovesPixels())
        expandDamageRectInsideRectWithFilters(targetDamageRect, surfaceRectInTargetSpace, layer->backgroundFilters());
}
Exemplo n.º 2
0
void CCDamageTracker::extendDamageForRenderSurface(CCLayerImpl* layer, FloatRect& targetDamageRect)
{
    // There are two ways a "descendant surface" can damage regions of the "target surface":
    //   1. Property change:
    //        - a surface's geometry can change because of
    //            - changes to descendants (i.e. the subtree) that affect the surface's content rect
    //            - changes to ancestor layers that propagate their property changes to their entire subtree.
    //        - just like layers, both the old surface rect and new surface rect will
    //          damage the target surface in this case.
    //
    //   2. Damage rect: This surface may have been damaged by its own layerList as well, and that damage
    //      should propagate to the target surface.
    //

    CCRenderSurface* renderSurface = layer->renderSurface();

    bool surfaceIsNew = false;
    FloatRect oldSurfaceRect = removeRectFromCurrentFrame(layer->id(), surfaceIsNew);

    FloatRect surfaceRectInTargetSpace = renderSurface->drawableContentRect(); // already includes replica if it exists.
    saveRectForNextFrame(layer->id(), surfaceRectInTargetSpace);

    FloatRect damageRectInLocalSpace;
    if (surfaceIsNew || renderSurface->surfacePropertyChanged()) {
        // The entire surface contributes damage.
        damageRectInLocalSpace = renderSurface->contentRect();

        // The surface's old region is now exposed on the target surface, too.
        targetDamageRect.uniteIfNonZero(oldSurfaceRect);
    } else {
        // Only the surface's damageRect will damage the target surface.
        damageRectInLocalSpace = renderSurface->damageTracker()->currentDamageRect();
    }

    // If there was damage, transform it to target space, and possibly contribute its reflection if needed.
    if (!damageRectInLocalSpace.isEmpty()) {
        const TransformationMatrix& originTransform = renderSurface->originTransform();
        FloatRect damageRectInTargetSpace = CCMathUtil::mapClippedRect(originTransform, damageRectInLocalSpace);
        targetDamageRect.uniteIfNonZero(damageRectInTargetSpace);

        if (layer->replicaLayer()) {
            const TransformationMatrix& replicaOriginTransform = renderSurface->replicaOriginTransform();
            targetDamageRect.uniteIfNonZero(CCMathUtil::mapClippedRect(replicaOriginTransform, damageRectInLocalSpace));
        }
    }

    // If there was damage on the replica's mask, then the target surface receives that damage as well.
    if (layer->replicaLayer() && layer->replicaLayer()->maskLayer()) {
        CCLayerImpl* replicaMaskLayer = layer->replicaLayer()->maskLayer();

        bool replicaIsNew = false;
        removeRectFromCurrentFrame(replicaMaskLayer->id(), replicaIsNew);

        // Compute the replica's "originTransform" that maps from the replica's origin space to the target surface origin space.
        const TransformationMatrix& replicaOriginTransform = renderSurface->replicaOriginTransform();
        FloatRect replicaMaskLayerRect = CCMathUtil::mapClippedRect(replicaOriginTransform, FloatRect(FloatPoint::zero(), FloatSize(replicaMaskLayer->bounds().width(), replicaMaskLayer->bounds().height())));
        saveRectForNextFrame(replicaMaskLayer->id(), replicaMaskLayerRect);

        // In the current implementation, a change in the replica mask damages the entire replica region.
        if (replicaIsNew || replicaMaskLayer->layerPropertyChanged() || !replicaMaskLayer->updateRect().isEmpty())
            targetDamageRect.uniteIfNonZero(replicaMaskLayerRect);
    }
}