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LibWeb: Convert images to common AbstractImageStyleValue base

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This commit moves both the ImageStyleValue and LinearGradientStyleValue
to a common base class of AbstractImageStyleValue. This abstracts
getting the natural_width/height, loading/resolving, and painting
the image.

Now for 'free' you get:

 - Linear gradients working with the various background sizing/repeat
   properties.
 - Linear gradients working as list-markers :^) -- best feature ever!

P.s. This commit is a little large as it's tricky to make this change
incrementally without breaking things.
This commit is contained in:
MacDue 2022-07-31 01:11:59 +01:00 • committed by Andreas Kling
parent 264543b90a
commit 6a6475673f
13 changed files with 140 additions and 70 deletions
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18
Userland/Libraries/LibWeb/Painting/MarkerPaintable.cpp
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@ -33,17 +33,25 @@ void MarkerPaintable::paint(PaintContext& context, PaintPhase phase) const
auto enclosing = enclosing_int_rect(absolute_rect());
if (auto const* list_style_image = layout_box().list_style_image_bitmap()) {
context.painter().blit(enclosing.location(), *list_style_image, list_style_image->rect());
int marker_width = (int)enclosing.height() / 2;
if (auto const* list_style_image = layout_box().list_style_image()) {
Gfx::IntRect image_rect {
0, 0,
list_style_image->natural_width().value_or(marker_width),
list_style_image->natural_height().value_or(marker_width)
};
image_rect.center_within(enclosing);
list_style_image->resolve_for_size(layout_box(), image_rect.size().to_type<float>());
list_style_image->paint(context, image_rect);
return;
}
auto color = computed_values().color();
int marker_width = (int)enclosing.height() / 2;
Gfx::IntRect marker_rect { 0, 0, marker_width, marker_width };
marker_rect.center_within(enclosing);
auto color = computed_values().color();
Gfx::AntiAliasingPainter aa_painter { context.painter() };
switch (layout_box().list_style_type()) {