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Code Issues Activity Actions

PaintBrush: Initial support for transparency. (#1883)

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This commit is contained in:
Nicolas Van Bossuyt 2020-04-21 12:03:58 +02:00 • committed by GitHub
parent 84317df579
commit 6a66207efa
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 13 additions and 10 deletions
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5
Applications/PaintBrush/BucketTool.cpp
View file

@ -55,9 +55,10 @@ static void flood_fill(Gfx::Bitmap& bitmap, const Gfx::Point& start_position, Co
while (!queue.is_empty()) {
auto position = queue.dequeue();
if (bitmap.get_pixel<Gfx::BitmapFormat::RGB32>(position.x(), position.y()) != target_color)
if (bitmap.get_pixel<Gfx::BitmapFormat::RGBA32>(position.x(), position.y()) != target_color)
continue;
bitmap.set_pixel<Gfx::BitmapFormat::RGB32>(position.x(), position.y(), fill_color);
bitmap.set_pixel<Gfx::BitmapFormat::RGBA32>(position.x(), position.y(), fill_color);
if (position.x() != 0)
queue.enqueue(position.translated(-1, 0));

6
Applications/PaintBrush/EraseTool.cpp
View file

@ -55,7 +55,7 @@ void EraseTool::on_mousedown(GUI::MouseEvent& event)
return;
Gfx::Rect r = build_rect(event.position(), m_widget->bitmap().rect());
GUI::Painter painter(m_widget->bitmap());
painter.fill_rect(r, get_color());
painter.clear_rect(r, get_color());
m_widget->update();
}
@ -67,7 +67,7 @@ void EraseTool::on_mousemove(GUI::MouseEvent& event)
if (event.buttons() & GUI::MouseButton::Left || event.buttons() & GUI::MouseButton::Right) {
Gfx::Rect r = build_rect(event.position(), m_widget->bitmap().rect());
GUI::Painter painter(m_widget->bitmap());
painter.fill_rect(r, get_color());
painter.clear_rect(r, get_color());
m_widget->update();
}
}
@ -112,5 +112,5 @@ Color EraseTool::get_color() const
{
if (m_use_secondary_color)
return m_widget->secondary_color();
return Color(Color::White);
return Color(255, 255, 255, 0);
}

4
Applications/PaintBrush/EraseTool.h
View file

@ -27,8 +27,8 @@
#pragma once
#include "Tool.h"
#include <LibGfx/Point.h>
#include <LibGUI/ActionGroup.h>
#include <LibGfx/Point.h>
class EraseTool final : public Tool {
public:
@ -45,7 +45,7 @@ private:
Gfx::Rect build_rect(const Gfx::Point& pos, const Gfx::Rect& widget_rect);
RefPtr<GUI::Menu> m_context_menu;
bool m_use_secondary_color { true };
bool m_use_secondary_color { false };
int m_thickness { 1 };
GUI::ActionGroup m_thickness_actions;
};

8
Applications/PaintBrush/PaintableWidget.cpp
View file

@ -26,9 +26,9 @@
#include "PaintableWidget.h"
#include "Tool.h"
#include <LibGUI/Painter.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Palette.h>
#include <LibGUI/Painter.h>
static PaintableWidget* s_the;
@ -46,8 +46,8 @@ PaintableWidget::PaintableWidget()
pal.set_color(ColorRole::Window, Color::MidGray);
set_palette(pal);
set_background_color(Color::MidGray);
m_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGB32, { 600, 400 });
m_bitmap->fill(Color::White);
m_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGBA32, { 600, 400 });
m_bitmap->fill(Color(255, 255, 255, 0));
}
PaintableWidget::~PaintableWidget()
@ -57,7 +57,9 @@ PaintableWidget::~PaintableWidget()
void PaintableWidget::paint_event(GUI::PaintEvent& event)
{
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.fill_rect_with_checkerboard(m_bitmap->rect(), { 8, 8 }, palette().base().darkened(0.9), palette().base());
painter.blit({ 0, 0 }, *m_bitmap, m_bitmap->rect());
}