/**
* Copies the previous cel of @a frame to @frame.
*/
void UndoTransaction::copyPreviousFrame(Layer* layer, int frame)
{
ASSERT(layer);
ASSERT(frame > 0);
// create a copy of the previous cel
Cel* src_cel = static_cast<LayerImage*>(layer)->getCel(frame-1);
Image* src_image = src_cel ? m_sprite->getStock()->getImage(src_cel->getImage()):
NULL;
// nothing to copy, it will be a transparent cel
if (!src_image)
return;
// copy the image
Image* dst_image = Image::createCopy(src_image);
int image_index = addImageInStock(dst_image);
// create the new cel
Cel* dst_cel = new Cel(frame, image_index);
if (src_cel) { // copy the data from the previous cel
dst_cel->setPosition(src_cel->getX(), src_cel->getY());
dst_cel->setOpacity(src_cel->getOpacity());
}
// add the cel in the layer
addCel(static_cast<LayerImage*>(layer), dst_cel);
}
void LayerImage::moveCel(Cel* cel, FrameNumber frame)
{
removeCel(cel);
cel->setFrame(frame);
addCel(cel);
}
void UndoTransaction::backgroundFromLayer(LayerImage* layer, int bgcolor)
{
ASSERT(layer);
ASSERT(layer->is_image());
ASSERT(layer->is_readable());
ASSERT(layer->is_writable());
ASSERT(layer->getSprite() == m_sprite);
ASSERT(m_sprite->getBackgroundLayer() == NULL);
// create a temporary image to draw each frame of the new
// `Background' layer
UniquePtr<Image> bg_image_wrap(Image::create(m_sprite->getPixelFormat(),
m_sprite->getWidth(),
m_sprite->getHeight()));
Image* bg_image = bg_image_wrap.get();
CelIterator it = layer->getCelBegin();
CelIterator end = layer->getCelEnd();
for (; it != end; ++it) {
Cel* cel = *it;
ASSERT((cel->getImage() > 0) &&
(cel->getImage() < m_sprite->getStock()->size()));
// get the image from the sprite's stock of images
Image* cel_image = m_sprite->getStock()->getImage(cel->getImage());
ASSERT(cel_image);
image_clear(bg_image, bgcolor);
image_merge(bg_image, cel_image,
cel->getX(),
cel->getY(),
MID(0, cel->getOpacity(), 255),
layer->getBlendMode());
// now we have to copy the new image (bg_image) to the cel...
setCelPosition(cel, 0, 0);
// same size of cel-image and bg-image
if (bg_image->w == cel_image->w &&
bg_image->h == cel_image->h) {
if (isEnabled())
m_undoHistory->pushUndoer(new undoers::ImageArea(m_undoHistory->getObjects(),
cel_image, 0, 0, cel_image->w, cel_image->h));
image_copy(cel_image, bg_image, 0, 0);
}
else {
replaceStockImage(cel->getImage(), Image::createCopy(bg_image));
}
}
// Fill all empty cels with a flat-image filled with bgcolor
for (int frame=0; frame<m_sprite->getTotalFrames(); frame++) {
Cel* cel = layer->getCel(frame);
if (!cel) {
Image* cel_image = Image::create(m_sprite->getPixelFormat(), m_sprite->getWidth(), m_sprite->getHeight());
image_clear(cel_image, bgcolor);
// Add the new image in the stock
int image_index = addImageInStock(cel_image);
// Create the new cel and add it to the new background layer
cel = new Cel(frame, image_index);
addCel(layer, cel);
}
}
configureLayerAsBackground(layer);
}
