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https://github.com/fergalmoran/ladybird.git
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8247dad540
Eventually I'd like to do some kind of bitmap layers, and we definitely want alpha channel support then, so let's just not paint ourselves into an uncomfortable corner early on. :^)
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
#include "BucketTool.h"
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#include "PaintableWidget.h"
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#include <AK/Queue.h>
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#include <AK/SinglyLinkedList.h>
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#include <LibGUI/GPainter.h>
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#include <SharedGraphics/GraphicsBitmap.h>
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#include <stdio.h>
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BucketTool::BucketTool()
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{
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}
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BucketTool::~BucketTool()
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{
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}
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static void flood_fill(GraphicsBitmap& bitmap, const Point& start_position, Color target_color, Color fill_color)
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{
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ASSERT(bitmap.bpp() == 32);
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if (target_color == fill_color)
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return;
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Queue<Point> queue;
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queue.enqueue(Point(start_position));
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while (!queue.is_empty()) {
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auto position = queue.dequeue();
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if (bitmap.get_pixel<GraphicsBitmap::Format::RGB32>(position.x(), position.y()) != target_color)
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continue;
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bitmap.set_pixel<GraphicsBitmap::Format::RGB32>(position.x(), position.y(), fill_color);
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if (position.x() != 0)
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queue.enqueue(position.translated(-1, 0));
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if (position.x() != bitmap.width() - 1)
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queue.enqueue(position.translated(1, 0));
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if (position.y() != 0)
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queue.enqueue(position.translated(0, -1));
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if (position.y() != bitmap.height() - 1)
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queue.enqueue(position.translated(0, 1));
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}
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}
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void BucketTool::on_mousedown(GMouseEvent& event)
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{
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if (!m_widget->rect().contains(event.position()))
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return;
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GPainter painter(m_widget->bitmap());
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auto target_color = m_widget->bitmap().get_pixel(event.x(), event.y());
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flood_fill(m_widget->bitmap(), event.position(), target_color, m_widget->color_for(event));
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m_widget->update();
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}
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