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LibGfx: Add Bitmap::rotated and Bitmap::flipped

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Hüseyin ASLITÜRK 2020-04-12 13:19:18 +03:00 • committed by Andreas Kling
parent c6944f8cc2
commit 8e9d031cb3
2 changed files with 49 additions and 0 deletions
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42
Libraries/LibGfx/Bitmap.cpp
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@ -98,6 +98,48 @@ Bitmap::Bitmap(BitmapFormat format, NonnullRefPtr<SharedBuffer>&& shared_buffer,
ASSERT(format != BitmapFormat::Indexed8);
}
NonnullRefPtr<Gfx::Bitmap> Bitmap::rotated(Gfx::RotationDirection rotation_direction) const
{
auto w = this->width();
auto h = this->height();
auto new_bitmap = Gfx::Bitmap::create(this->format(), { h, w });
for (int i = 0; i < w; i++) {
for (int j = 0; j < h; j++) {
Color color;
if (rotation_direction == Gfx::RotationDirection::Left)
color = this->get_pixel(w - i - 1, j);
else
color = this->get_pixel(i, h - j - 1);
new_bitmap->set_pixel(j, i, color);
}
}
return new_bitmap;
}
NonnullRefPtr<Gfx::Bitmap> Bitmap::flipped(Gfx::Orientation orientation) const
{
auto w = this->width();
auto h = this->height();
auto new_bitmap = Gfx::Bitmap::create(this->format(), { w, h });
for (int i = 0; i < w; i++) {
for (int j = 0; j < h; j++) {
Color color = this->get_pixel(i, j);
if (orientation == Orientation::Vertical)
new_bitmap->set_pixel(i, h - j - 1, color);
else
new_bitmap->set_pixel(w - i - 1, j, color);
}
}
return new_bitmap;
}
NonnullRefPtr<Bitmap> Bitmap::to_bitmap_backed_by_shared_buffer() const
{
if (m_shared_buffer)