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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. :^)
71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
#include "SprayTool.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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#include <LibM/math.h>
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SprayTool::SprayTool()
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{
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m_timer.on_timeout = [=]() {
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paint_it();
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};
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m_timer.set_interval(200);
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}
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SprayTool::~SprayTool()
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{
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}
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static double nrand()
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{
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return double(rand()) / double(RAND_MAX);
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}
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void SprayTool::paint_it()
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{
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GPainter painter(m_widget->bitmap());
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auto& bitmap = m_widget->bitmap();
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ASSERT(bitmap.bpp() == 32);
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m_widget->update();
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const double base_radius = 15;
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for (int i = 0; i < 100 + (nrand() * 800); i++) {
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double radius = base_radius * nrand();
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double angle = 2 * M_PI * nrand();
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const int xpos = m_last_pos.x() + radius * cos(angle);
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const int ypos = m_last_pos.y() - radius * sin(angle);
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if (xpos < 0 || xpos >= bitmap.width())
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continue;
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if (ypos < 0 || ypos >= bitmap.height())
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continue;
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bitmap.set_pixel<GraphicsBitmap::Format::RGB32>(xpos, ypos, m_color);
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}
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}
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void SprayTool::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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m_color = m_widget->color_for(event);
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m_last_pos = event.position();
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m_timer.start();
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paint_it();
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}
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void SprayTool::on_mousemove(GMouseEvent& event)
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{
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m_last_pos = event.position();
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if (m_timer.is_active()) {
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paint_it();
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m_timer.restart(m_timer.interval());
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}
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}
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void SprayTool::on_mouseup(GMouseEvent&)
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{
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m_timer.stop();
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}
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