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PixelPaint: Introduce new mask features

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This patch adds a new Editing-Mask type to layers. This kind of mask
is used to restrict changes on the content bitmap only to areas where
the mask is drawn. The intensity of a pixel change is controlled by the
alpha-value of the mask.

Furthermore a function to invert and clear masks has been introduced.
When a new mask is created for a layer the edit mode of the layer is
also changed to Mask so that the user can immediately start to draw the
mask.
This commit is contained in:
Torstennator 2023-05-12 16:07:51 +02:00 • committed by Jelle Raaijmakers
parent 7e5f1fa895
commit e3509efc1b
6 changed files with 147 additions and 7 deletions
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29
Userland/Applications/PixelPaint/MainWidget.cpp
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@ -812,11 +812,19 @@ ErrorOr<void> MainWidget::initialize_menubar(GUI::Window& window)
m_add_mask_action = GUI::Action::create(
"Add M&ask", { Mod_Ctrl | Mod_Shift, Key_M }, g_icon_bag.add_mask, create_layer_mask_callback("Add Mask", [&](Layer* active_layer) {
VERIFY(!active_layer->is_masked());
if (auto maybe_error = active_layer->create_mask(); maybe_error.is_error())
if (auto maybe_error = active_layer->create_mask(Layer::MaskType::BasicMask); maybe_error.is_error())
GUI::MessageBox::show_error(&window, MUST(String::formatted("Failed to create layer mask: {}", maybe_error.release_error())));
}));
TRY(m_layer_menu->try_add_action(*m_add_mask_action));
m_add_editing_mask_action = GUI::Action::create(
"Add E&diting Mask", { Mod_Ctrl | Mod_Alt, Key_E }, g_icon_bag.add_mask, create_layer_mask_callback("Add Editing Mask", [&](Layer* active_layer) {
VERIFY(!active_layer->is_masked());
if (auto maybe_error = active_layer->create_mask(Layer::MaskType::EditingMask); maybe_error.is_error())
GUI::MessageBox::show_error(&window, MUST(String::formatted("Failed to create layer mask: {}", maybe_error.release_error())));
}));
TRY(m_layer_menu->try_add_action(*m_add_editing_mask_action));
m_delete_mask_action = GUI::Action::create(
"Delete Mask", create_layer_mask_callback("Delete Mask", [&](Layer* active_layer) {
VERIFY(active_layer->is_masked());
@ -831,6 +839,20 @@ ErrorOr<void> MainWidget::initialize_menubar(GUI::Window& window)
}));
TRY(m_layer_menu->try_add_action(*m_apply_mask_action));
m_invert_mask_action = GUI::Action::create(
"Invert Mask", create_layer_mask_callback("Invert Mask", [&](Layer* active_layer) {
VERIFY(active_layer->is_masked());
active_layer->invert_mask();
}));
TRY(m_layer_menu->try_add_action(*m_invert_mask_action));
m_clear_mask_action = GUI::Action::create(
"Clear Mask", create_layer_mask_callback("Clear Mask", [&](Layer* active_layer) {
VERIFY(active_layer->is_masked());
active_layer->clear_mask();
}));
TRY(m_layer_menu->try_add_action(*m_clear_mask_action));
TRY(m_layer_menu->try_add_separator());
TRY(m_layer_menu->try_add_action(GUI::Action::create(
@ -1205,8 +1227,11 @@ void MainWidget::set_mask_actions_for_layer(Layer* layer)
auto masked = layer->is_masked();
m_add_mask_action->set_visible(!masked);
m_add_editing_mask_action->set_visible(!masked);
m_invert_mask_action->set_visible(masked);
m_clear_mask_action->set_visible(masked);
m_delete_mask_action->set_visible(masked);
m_apply_mask_action->set_visible(masked);
m_apply_mask_action->set_visible(layer->mask_type() == Layer::MaskType::BasicMask);
}
void MainWidget::open_image(FileSystemAccessClient::File file)