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PixelPaint: Add Merge Active Layer Down action

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This allows you to merge the active layer with the one below it.
This commit is contained in:
Mustafa Quraish 2021-09-02 03:10:59 -04:00 • committed by Andreas Kling
parent 97cc34c034
commit 339f0d5bca
3 changed files with 33 additions and 0 deletions
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18
Userland/Applications/PixelPaint/Image.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Mustafa Quraish <mustafa@cs.toronto.edu>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -483,6 +484,23 @@ void Image::merge_visible_layers()
}
}
void Image::merge_active_layer_down(Layer& layer)
{
if (m_layers.size() < 2)
return;
int layer_index = this->index_of(layer);
if (layer_index == 0) {
dbgln("Cannot merge layer down: layer is already at the bottom");
return; // FIXME: Notify user of error properly.
}
auto& layer_below = m_layers.at(layer_index - 1);
GUI::Painter painter(layer_below.bitmap());
painter.draw_scaled_bitmap(rect(), layer.bitmap(), layer.rect(), (float)layer.opacity_percent() / 100.0f);
remove_layer(layer);
select_layer(&layer_below);
}
void Image::select_layer(Layer* layer)
{
for (auto* client : m_clients)