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cssshadowvalue: Simplify inset shadow nodes to color nodes if possible

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inset shadows like this are frequently used to implement highlights in
CSS without crowing them min size of the element.
This commit is contained in:
Timm Bäder 2019-11-29 13:34:22 +01:00
parent ca66e9788c
commit a75523da68
1 changed files with 71 additions and 10 deletions
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81
gtk/gtkcssshadowvalue.c
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@ -386,23 +386,84 @@ gtk_css_shadow_value_snapshot_outset (const GtkCssValue *shadow,
}
void
gtk_css_shadow_value_snapshot_inset (const GtkCssValue *shadow,
GtkSnapshot *snapshot,
const GskRoundedRect*padding_box)
gtk_css_shadow_value_snapshot_inset (const GtkCssValue *shadow,
GtkSnapshot *snapshot,
const GskRoundedRect *padding_box)
{
double dx, dy, spread, radius;
const GdkRGBA *color;
g_return_if_fail (shadow->class == &GTK_CSS_VALUE_SHADOW);
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (_gtk_css_rgba_value_get_rgba (shadow->color)))
return;
gtk_snapshot_append_inset_shadow (snapshot,
padding_box,
_gtk_css_rgba_value_get_rgba (shadow->color),
_gtk_css_number_value_get (shadow->hoffset, 0),
_gtk_css_number_value_get (shadow->voffset, 0),
_gtk_css_number_value_get (shadow->spread, 0),
_gtk_css_number_value_get (shadow->radius, 0));
dx = _gtk_css_number_value_get (shadow->hoffset, 0);
dy = _gtk_css_number_value_get (shadow->voffset, 0);
spread = _gtk_css_number_value_get (shadow->spread, 0);
radius = _gtk_css_number_value_get (shadow->radius, 0);
color = _gtk_css_rgba_value_get_rgba (shadow->color);
/* These are trivial to do with a color node */
if (spread == 0 && radius == 0 &&
gsk_rounded_rect_is_rectilinear (padding_box))
{
const graphene_rect_t *padding_bounds = &padding_box->bounds;
if (dx > 0)
{
const float y = dy > 0 ? dy : 0;
gtk_snapshot_append_color (snapshot, color,
&GRAPHENE_RECT_INIT (
padding_bounds->origin.x,
padding_bounds->origin.y + y,
dx,
padding_bounds->size.height - ABS (dy)
));
}
else if (dx < 0)
{
const float y = dy > 0 ? dy : 0;
gtk_snapshot_append_color (snapshot, color,
&GRAPHENE_RECT_INIT (
padding_bounds->origin.x + padding_bounds->size.width + dx,
padding_bounds->origin.y + y,
- dx,
padding_bounds->size.height - ABS (dy)
));
}
if (dy > 0)
{
gtk_snapshot_append_color (snapshot, color,
&GRAPHENE_RECT_INIT (
padding_bounds->origin.x,
padding_bounds->origin.y,
padding_bounds->size.width,
dy
));
}
else if (dy < 0)
{
gtk_snapshot_append_color (snapshot, color,
&GRAPHENE_RECT_INIT (
padding_bounds->origin.x,
padding_bounds->origin.y + padding_bounds->size.height + dy,
padding_bounds->size.width,
- dy
));
}
}
else
{
gtk_snapshot_append_inset_shadow (snapshot,
padding_box,
color,
dx, dy, spread, radius);
}
}
gboolean