RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-14 06:04:57 +00:00
Code Issues Activity Actions

LibGfx: Add RepeatingBitmapPaintStyle and OffsetPaintStyle

Browse source 
RepeatingBitmapPaintStyle tiles a bitmap passed on passed in parameters
and paints according to that.

OffsetPaintStyle offsets an existing paint style and paints with that.

These two will be useful in the PDF renderer.
This commit is contained in:
Kyle Pereira 2023-12-07 12:22:12 +00:00 • committed by Andreas Kling
parent 082a4197b6
commit 649f1df771
1 changed files with 57 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

57
Userland/Libraries/LibGfx/PaintStyle.h
View file

@ -83,6 +83,63 @@ private:
IntPoint m_offset;
};
class RepeatingBitmapPaintStyle : public Gfx::PaintStyle {
public:
static ErrorOr<NonnullRefPtr<RepeatingBitmapPaintStyle>> create(Gfx::Bitmap const& bitmap, Gfx::IntPoint steps, Color fallback)
{
return adopt_nonnull_ref_or_enomem(new (nothrow) RepeatingBitmapPaintStyle(bitmap, steps, fallback));
}
virtual Color sample_color(Gfx::IntPoint point) const override
{
point.set_x(point.x() % m_steps.x());
point.set_y(point.y() % m_steps.y());
if (point.x() < 0 || point.y() < 0 || point.x() >= m_bitmap->width() || point.y() >= m_bitmap->height())
return m_fallback;
auto px = m_bitmap->get_pixel(point);
return px;
}
private:
RepeatingBitmapPaintStyle(Gfx::Bitmap const& bitmap, Gfx::IntPoint steps, Color fallback)
: m_bitmap(bitmap)
, m_steps(steps)
, m_fallback(fallback)
{
}
NonnullRefPtr<Gfx::Bitmap const> m_bitmap;
Gfx::IntPoint m_steps;
Color m_fallback;
};
class OffsetPaintStyle : public Gfx::PaintStyle {
public:
static ErrorOr<NonnullRefPtr<OffsetPaintStyle>> create(RefPtr<PaintStyle> other, Gfx::AffineTransform transform)
{
return adopt_nonnull_ref_or_enomem(new (nothrow) OffsetPaintStyle(move(other), transform));
}
virtual void paint(Gfx::IntRect physical_bounding_box, PaintFunction paint) const override
{
m_other->paint(m_transform.map(physical_bounding_box), [=, this, paint = move(paint)](SamplerFunction sampler) {
paint([=, this, sampler = move(sampler)](Gfx::IntPoint point) {
return sampler(m_transform.map(point));
});
});
}
private:
OffsetPaintStyle(RefPtr<PaintStyle> other, Gfx::AffineTransform transform)
: m_other(move(other))
, m_transform(transform)
{
}
RefPtr<PaintStyle> m_other;
Gfx::AffineTransform m_transform;
};
class GradientPaintStyle : public PaintStyle {
public:
ErrorOr<void> add_color_stop(float position, Color color, Optional<float> transition_hint = {})