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Code Issues Activity Actions

PixelPaint: Make image flattening actions work with disjoint layers

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The "Flatten Image" and "Merge Visible" actions now work with layers
of different sizes. These actions now expand the bounding rect of the
newly merged layer to contain all layers being merged.
This commit is contained in:
Tim Ledbetter 2023-02-11 15:03:42 +00:00 • committed by Sam Atkins
parent 2bec236ea6
commit 74dff6250c
3 changed files with 62 additions and 39 deletions
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80
Userland/Applications/PixelPaint/Image.cpp
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@ -334,50 +334,60 @@ void Image::remove_layer(Layer& layer)
did_modify_layer_stack();
}
void Image::flatten_all_layers()
ErrorOr<void> Image::flatten_all_layers()
{
if (m_layers.size() < 2)
return;
auto& bottom_layer = m_layers.at(0);
GUI::Painter painter(bottom_layer.content_bitmap());
paint_into(painter, { 0, 0, m_size.width(), m_size.height() }, 1.0f);
for (size_t index = m_layers.size() - 1; index > 0; index--) {
auto& layer = m_layers.at(index);
remove_layer(layer);
}
bottom_layer.set_name("Background");
select_layer(&bottom_layer);
return merge_layers(LayerMergeMode::All);
}
void Image::merge_visible_layers()
ErrorOr<void> Image::merge_visible_layers()
{
return merge_layers(LayerMergeMode::VisibleOnly);
}
ErrorOr<void> Image::merge_layers(LayerMergeMode layer_merge_mode)
{
if (m_layers.size() < 2)
return;
return {};
size_t index = 0;
NonnullRefPtrVector<Layer> new_layers;
Gfx::IntRect merged_layer_bounding_rect = {};
size_t bottom_layer_index = 0;
for (auto const& layer : m_layers) {
if (!layer.is_visible()) {
if (layer_merge_mode == LayerMergeMode::VisibleOnly)
TRY(new_layers.try_append(layer));
if (merged_layer_bounding_rect.is_empty())
bottom_layer_index++;
continue;
}
merged_layer_bounding_rect = merged_layer_bounding_rect.united(layer.relative_rect());
}
while (index < m_layers.size()) {
if (m_layers.at(index).is_visible()) {
auto& bottom_layer = m_layers.at(index);
GUI::Painter painter(bottom_layer.content_bitmap());
paint_into(painter, { 0, 0, m_size.width(), m_size.height() }, 1.0f);
select_layer(&bottom_layer);
index++;
break;
}
index++;
if (merged_layer_bounding_rect.is_empty())
return {};
NonnullRefPtr<Layer> bottom_layer = m_layers.at(bottom_layer_index);
NonnullRefPtr<Layer> merged_layer = bottom_layer;
if (!merged_layer->relative_rect().contains(merged_layer_bounding_rect)) {
merged_layer = TRY(Layer::create_with_size(*this, merged_layer_bounding_rect.size(), bottom_layer->name()));
merged_layer->set_location(merged_layer_bounding_rect.location());
}
while (index < m_layers.size()) {
if (m_layers.at(index).is_visible()) {
auto& layer = m_layers.at(index);
remove_layer(layer);
} else {
index++;
}
GUI::Painter painter(merged_layer->content_bitmap());
if (merged_layer.ptr() != bottom_layer.ptr())
painter.blit(bottom_layer->location() - merged_layer->location(), bottom_layer->display_bitmap(), bottom_layer->rect(), static_cast<float>(bottom_layer->opacity_percent()) / 100.0f);
for (size_t index = bottom_layer_index + 1; index < m_layers.size(); index++) {
auto& layer = m_layers.at(index);
if (!layer.is_visible())
continue;
painter.blit(layer.location() - merged_layer->location(), layer.display_bitmap(), layer.rect(), static_cast<float>(layer.opacity_percent()) / 100.0f);
}
TRY(new_layers.try_append(merged_layer));
m_layers = move(new_layers);
select_layer(merged_layer.ptr());
did_modify_layer_stack();
return {};
}
void Image::merge_active_layer_up(Layer& layer)