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PixelPaint+LibGfx: Allow resizing images and layers

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This PR adds resize ability to PixelPaint as per issue 11862.
The previous behaviour was to always rescale the canvas when
resizing an image. This adds a checkbox to toggle between
rescaling, and resizing which blits the existing canvas to
the top left of the new, resized canvas.

As part of this, a new ScalingMode is added to
LibGfx - None.
This commit is contained in:
jack gleeson 2022-10-10 12:54:06 -07:00 • committed by Sam Atkins
parent d6334dcab1
commit 4bf587811f
6 changed files with 35 additions and 3 deletions
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8
Userland/Libraries/LibGfx/Painter.cpp
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@ -1248,6 +1248,9 @@ ALWAYS_INLINE static void do_draw_scaled_bitmap(Gfx::Bitmap& target, IntRect con
case Painter::ScalingMode::BilinearBlend:
do_draw_scaled_bitmap<has_alpha_channel, Painter::ScalingMode::BilinearBlend>(target, dst_rect, clipped_rect, source, src_rect, get_pixel, opacity);
break;
case Painter::ScalingMode::None:
do_draw_scaled_bitmap<has_alpha_channel, Painter::ScalingMode::None>(target, dst_rect, clipped_rect, source, src_rect, get_pixel, opacity);
break;
}
}
@ -1262,6 +1265,11 @@ void Painter::draw_scaled_bitmap(IntRect const& a_dst_rect, Gfx::Bitmap const& s
if (scale() == source.scale() && a_src_rect == int_src_rect && a_dst_rect.size() == int_src_rect.size())
return blit(a_dst_rect.location(), source, int_src_rect, opacity);
if (scaling_mode == ScalingMode::None) {
IntRect clipped_draw_rect { (int)a_src_rect.location().x(), (int)a_src_rect.location().y(), a_dst_rect.size().width(), a_dst_rect.size().height() };
return blit(a_dst_rect.location(), source, clipped_draw_rect, opacity);
}
auto dst_rect = to_physical(a_dst_rect);
auto src_rect = a_src_rect * source.scale();
auto clipped_rect = dst_rect.intersected(clip_rect() * scale());