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PixelPaint: Add function to visualize editing-masks

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This patch adds a function to make the editing-eask visible while
beeing in mask-mode so that the user can see which parts are covered
by the masks and can therefore be modified by other tools that support
editing masks.
This commit is contained in:
Torstennator 2023-06-13 14:59:32 +02:00 • committed by Jelle Raaijmakers
parent 69650a5812
commit 660d6f171c
6 changed files with 76 additions and 0 deletions
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35
Userland/Applications/PixelPaint/Layer.cpp
View file

@ -8,9 +8,11 @@
#include "Layer.h"
#include "Image.h"
#include "ImageEditor.h"
#include "Selection.h"
#include <AK/RefPtr.h>
#include <AK/Try.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Painter.h>
@ -45,6 +47,7 @@ ErrorOr<NonnullRefPtr<Layer>> Layer::create_snapshot(Image& image, Layer const&
snapshot->m_mask_bitmap = TRY(layer.mask_bitmap()->clone());
snapshot->m_edit_mode = layer.m_edit_mode;
snapshot->m_mask_type = layer.m_mask_type;
snapshot->m_visible_mask = layer.m_visible_mask;
}
/*
@ -322,6 +325,7 @@ void Layer::delete_mask()
{
m_mask_bitmap = nullptr;
m_mask_type = MaskType::None;
m_visible_mask = false;
set_edit_mode(EditMode::Content);
update_cached_bitmap();
}
@ -464,4 +468,35 @@ Layer::MaskType Layer::mask_type()
return m_mask_type;
}
void Layer::on_second_paint(ImageEditor& editor)
{
if (!m_visible_mask || edit_mode() != EditMode::Mask)
return;
auto visible_rect = editor.active_layer_visible_rect();
if (visible_rect.width() == 0 || visible_rect.height() == 0)
return;
GUI::Painter painter(editor);
painter.translate(visible_rect.location());
auto content_offset = editor.content_to_frame_position(location());
auto drawing_cursor_offset = visible_rect.location() - content_offset.to_type<int>();
Gfx::Color editing_mask_color = editor.primary_color();
int mask_alpha;
Gfx::IntPoint mask_coordinates;
for (int y = 0; y < visible_rect.height(); y++) {
for (int x = 0; x < visible_rect.width(); x++) {
mask_coordinates = (Gfx::FloatPoint(drawing_cursor_offset.x() + x, drawing_cursor_offset.y() + y) / editor.scale()).to_type<int>();
mask_alpha = mask_bitmap()->get_pixel(mask_coordinates).alpha();
if (!mask_alpha)
continue;
painter.set_pixel(x, y, editing_mask_color.with_alpha(mask_alpha), true);
}
}
}
}