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Code Issues Projects Releases Packages Wiki Activity Actions 6

ImageViewer: Allow choice between nearest neighbor and bilinear scaling

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Currently, ImageViewer always uses nearest neighbor scaling.
This allows the user to choose whether to use nearest neighbor
or bilinear scaling. It current defaults to nearest neighbor.
This commit is contained in:
Luke Wilde 2021-12-29 15:37:04 +00:00 committed by Andreas Kling
parent e179cf2540
commit 8eb01c0b11
Notes: sideshowbarker 2024-07-18 00:54:03 +09:00 
Author: https://github.com/Lubrsi
Commit: https://github.com/SerenityOS/serenity/commit/8eb01c0b114
Pull-request: https://github.com/SerenityOS/serenity/pull/11487
3 changed files with 33 additions and 2 deletions
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9
Userland/Applications/ImageViewer/ViewWidget.cpp
View file

@ -14,7 +14,6 @@
#include <LibCore/MappedFile.h>
#include <LibCore/Timer.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Orientation.h>
#include <LibGfx/Palette.h>
@ -178,7 +177,7 @@ void ViewWidget::paint_event(GUI::PaintEvent& event)
Gfx::StylePainter::paint_transparency_grid(painter, frame_inner_rect(), palette());
if (!m_bitmap.is_null())
painter.draw_scaled_bitmap(m_bitmap_rect, *m_bitmap, m_bitmap->rect());
painter.draw_scaled_bitmap(m_bitmap_rect, *m_bitmap, m_bitmap->rect(), 1.0f, m_scaling_mode);
}
void ViewWidget::mousedown_event(GUI::MouseEvent& event)
@ -343,4 +342,10 @@ void ViewWidget::animate()
}
}
void ViewWidget::set_scaling_mode(Gfx::Painter::ScalingMode scaling_mode)
{
m_scaling_mode = scaling_mode;
update();
}
}

3
Userland/Applications/ImageViewer/ViewWidget.h
View file

@ -10,6 +10,7 @@
#include <LibCore/Timer.h>
#include <LibGUI/Frame.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Point.h>
#include <LibImageDecoderClient/Client.h>
@ -37,6 +38,7 @@ public:
void set_scaled_for_first_image(bool val) { m_scaled_for_first_image = val; }
void set_path(const String& path);
void resize_window();
void set_scaling_mode(Gfx::Painter::ScalingMode);
bool is_next_available() const;
bool is_previous_available() const;
@ -86,6 +88,7 @@ private:
Gfx::FloatPoint m_saved_pan_origin;
Vector<String> m_files_in_same_dir;
Optional<size_t> m_current_index;
Gfx::Painter::ScalingMode m_scaling_mode { Gfx::Painter::ScalingMode::NearestNeighbor };
};
}

23
Userland/Applications/ImageViewer/main.cpp
View file

@ -11,6 +11,7 @@
#include <LibCore/System.h>
#include <LibDesktop/Launcher.h>
#include <LibGUI/Action.h>
#include <LibGUI/ActionGroup.h>
#include <LibGUI/Application.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Clipboard.h>
@ -225,6 +226,16 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
if (widget.bitmap())
GUI::Clipboard::the().set_bitmap(*widget.bitmap());
});
auto nearest_neighbor_action = GUI::Action::create_checkable("&Nearest Neighbor", [&](auto&) {
widget.set_scaling_mode(Gfx::Painter::ScalingMode::NearestNeighbor);
});
nearest_neighbor_action->set_checked(true);
auto bilinear_action = GUI::Action::create_checkable("&Bilinear", [&](auto&) {
widget.set_scaling_mode(Gfx::Painter::ScalingMode::BilinearBlend);
});
widget.on_image_change = [&](const Gfx::Bitmap* bitmap) {
bool should_enable_image_actions = (bitmap != nullptr);
bool should_enable_forward_actions = (widget.is_next_available() && should_enable_image_actions);
@ -287,6 +298,18 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
view_menu.add_action(zoom_in_action);
view_menu.add_action(reset_zoom_action);
view_menu.add_action(zoom_out_action);
view_menu.add_separator();
auto& scaling_mode_menu = view_menu.add_submenu("&Scaling Mode");
auto scaling_mode_group = make<GUI::ActionGroup>();
scaling_mode_group->set_exclusive(true);
scaling_mode_group->add_action(*nearest_neighbor_action);
scaling_mode_group->add_action(*bilinear_action);
scaling_mode_menu.add_action(nearest_neighbor_action);
scaling_mode_menu.add_action(bilinear_action);
view_menu.add_separator();
view_menu.add_action(hide_show_toolbar_action);