void InvertMaskCommand::onExecute(Context* context)
{
bool hasMask = false;
{
const ContextReader reader(context);
if (reader.document()->isMaskVisible())
hasMask = true;
}
// without mask?...
if (!hasMask) {
// so we select all
Command* mask_all_cmd =
CommandsModule::instance()->getCommandByName(CommandId::MaskAll);
context->executeCommand(mask_all_cmd);
}
// invert the current mask
else {
ContextWriter writer(context);
Document* document(writer.document());
Sprite* sprite(writer.sprite());
// Select all the sprite area
base::UniquePtr<Mask> mask(new Mask());
mask->replace(sprite->bounds());
// Remove in the new mask the current sprite marked region
const gfx::Rect& maskBounds = document->mask()->bounds();
doc::fill_rect(mask->bitmap(),
maskBounds.x, maskBounds.y,
maskBounds.x + maskBounds.w-1,
maskBounds.y + maskBounds.h-1, 0);
Mask* curMask = document->mask();
if (curMask->bitmap()) {
// Copy the inverted region in the new mask (we just modify the
// document's mask temporaly here)
curMask->freeze();
curMask->invert();
doc::copy_image(mask->bitmap(),
curMask->bitmap(),
curMask->bounds().x,
curMask->bounds().y);
curMask->invert();
curMask->unfreeze();
}
// We need only need the area inside the sprite
mask->intersect(sprite->bounds());
// Set the new mask
Transaction transaction(writer.context(), "Mask Invert", DoesntModifyDocument);
transaction.execute(new cmd::SetMask(document, mask));
transaction.commit();
document->generateMaskBoundaries();
update_screen_for_document(document);
}
}
