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LibWeb: Remove "cached corner bitmap" and its use in the corner clipper

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With the recording painter the actual painting operations are delayed,
so now if multiple corner clippers are constructed, and they use a
shared bitmap they can interfere with each other. The use of this shared
bitmap was somewhat questionable anyway, so this is not much of a loss.

This fixes the border-radius.html test page.
This commit is contained in:
MacDue 2023-10-21 19:17:49 +01:00 • committed by Alexander Kalenik
parent 1a58fee0fd
commit 1c012f0a4a
5 changed files with 8 additions and 50 deletions
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25
Userland/Libraries/LibWeb/Painting/BorderPainting.cpp
View file

@ -545,31 +545,6 @@ void paint_border(PaintContext& context, BorderEdge edge, DevicePixelRect const&
}
}
RefPtr<Gfx::Bitmap> get_cached_corner_bitmap(DevicePixelSize corners_size)
{
auto allocate_mask_bitmap = [&]() -> RefPtr<Gfx::Bitmap> {
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, corners_size.to_type<int>());
if (!bitmap.is_error())
return bitmap.release_value();
return nullptr;
};
// FIXME: Allocate per page?
static thread_local auto corner_bitmap = allocate_mask_bitmap();
// Only reallocate the corner bitmap is the existing one is too small.
// (should mean no more allocations after the first paint -- amortised zero allocations :^))
if (corner_bitmap && corner_bitmap->rect().size().contains(corners_size.to_type<int>())) {
Gfx::Painter painter { *corner_bitmap };
painter.clear_rect({ { 0, 0 }, corners_size }, Gfx::Color());
} else {
corner_bitmap = allocate_mask_bitmap();
if (!corner_bitmap) {
dbgln("Failed to allocate corner bitmap with size {}", corners_size);
return nullptr;
}
}
return corner_bitmap;
}
void paint_all_borders(PaintContext& context, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii_data, BordersData const& borders_data)
{
if (borders_data.top.width <= 0 && borders_data.right.width <= 0 && borders_data.left.width <= 0 && borders_data.bottom.width <= 0)

2
Userland/Libraries/LibWeb/Painting/BorderPainting.h
View file

@ -28,8 +28,6 @@ enum class BorderEdge {
// Returns OptionalNone if there is no outline to paint.
Optional<BordersData> borders_data_for_outline(Layout::Node const&, Color outline_color, CSS::OutlineStyle outline_style, CSSPixels outline_width);
RefPtr<Gfx::Bitmap> get_cached_corner_bitmap(DevicePixelSize corners_size);
void paint_border(PaintContext& context, BorderEdge edge, DevicePixelRect const& rect, Gfx::AntiAliasingPainter::CornerRadius const& radius, Gfx::AntiAliasingPainter::CornerRadius const& opposite_radius, BordersData const& borders_data, Gfx::Path& path, bool last);
void paint_all_borders(PaintContext& context, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii_data, BordersData const&);

19
Userland/Libraries/LibWeb/Painting/BorderRadiusCornerClipper.cpp
View file

@ -11,7 +11,7 @@
namespace Web::Painting {
ErrorOr<NonnullRefPtr<BorderRadiusCornerClipper>> BorderRadiusCornerClipper::create(CornerRadii const& corner_radii, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip, UseCachedBitmap use_cached_bitmap)
ErrorOr<NonnullRefPtr<BorderRadiusCornerClipper>> BorderRadiusCornerClipper::create(CornerRadii const& corner_radii, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip)
{
VERIFY(border_radii.has_any_radius());
@ -37,20 +37,12 @@ ErrorOr<NonnullRefPtr<BorderRadiusCornerClipper>> BorderRadiusCornerClipper::cre
top_right.vertical_radius + bottom_right.vertical_radius))
};
RefPtr<Gfx::Bitmap> corner_bitmap;
if (use_cached_bitmap == UseCachedBitmap::Yes) {
corner_bitmap = get_cached_corner_bitmap(corners_bitmap_size);
if (!corner_bitmap)
return Error::from_errno(ENOMEM);
} else {
corner_bitmap = TRY(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, corners_bitmap_size.to_type<int>()));
}
RefPtr<Gfx::Bitmap> corner_bitmap = TRY(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, corners_bitmap_size.to_type<int>()));
CornerData corner_data {
.corner_radii = corner_radii,
.page_locations = { .top_left = border_rect.top_left(), .top_right = border_rect.top_right().translated(-top_right.horizontal_radius, 0), .bottom_right = border_rect.bottom_right().translated(-bottom_right.horizontal_radius, -bottom_right.vertical_radius), .bottom_left = border_rect.bottom_left().translated(0, -bottom_left.vertical_radius) },
.bitmap_locations = { .top_left = { 0, 0 }, .top_right = { corners_bitmap_size.width() - top_right.horizontal_radius, 0 }, .bottom_right = { corners_bitmap_size.width() - bottom_right.horizontal_radius, corners_bitmap_size.height() - bottom_right.vertical_radius }, .bottom_left = { 0, corners_bitmap_size.height() - bottom_left.vertical_radius } },
.corner_bitmap_size = corners_bitmap_size
};
return try_make_ref_counted<BorderRadiusCornerClipper>(corner_data, corner_bitmap.release_nonnull(), corner_clip, border_rect);
@ -61,8 +53,7 @@ void BorderRadiusCornerClipper::sample_under_corners(Gfx::Painter& page_painter)
// Generate a mask for the corners:
Gfx::Painter corner_painter { *m_corner_bitmap };
Gfx::AntiAliasingPainter corner_aa_painter { corner_painter };
Gfx::IntRect corner_rect { { 0, 0 }, m_data.corner_bitmap_size };
corner_aa_painter.fill_rect_with_rounded_corners(corner_rect, Color::NamedColor::Black,
corner_aa_painter.fill_rect_with_rounded_corners(m_corner_bitmap->rect(), Color::NamedColor::Black,
m_data.corner_radii.top_left, m_data.corner_radii.top_right, m_data.corner_radii.bottom_right, m_data.corner_radii.bottom_left);
auto copy_page_masked = [&](Gfx::IntRect const& mask_src, Gfx::IntPoint const& page_location) {
@ -112,7 +103,7 @@ void BorderRadiusCornerClipper::blit_corner_clipping(Gfx::Painter& painter)
painter.blit(m_data.page_locations.bottom_left.to_type<int>(), *m_corner_bitmap, m_data.corner_radii.bottom_left.as_rect().translated(m_data.bitmap_locations.bottom_left.to_type<int>()));
}
ScopedCornerRadiusClip::ScopedCornerRadiusClip(PaintContext& context, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip, BorderRadiusCornerClipper::UseCachedBitmap use_cached_bitmap)
ScopedCornerRadiusClip::ScopedCornerRadiusClip(PaintContext& context, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip)
: m_context(context)
{
if (border_radii.has_any_radius()) {
@ -122,7 +113,7 @@ ScopedCornerRadiusClip::ScopedCornerRadiusClip(PaintContext& context, DevicePixe
.bottom_right = border_radii.bottom_right.as_corner(context),
.bottom_left = border_radii.bottom_left.as_corner(context)
};
auto clipper = BorderRadiusCornerClipper::create(corner_radii, border_rect, border_radii, corner_clip, use_cached_bitmap);
auto clipper = BorderRadiusCornerClipper::create(corner_radii, border_rect, border_radii, corner_clip);
if (!clipper.is_error()) {
m_corner_clipper = clipper.release_value();
m_context.painter().sample_under_corners(*m_corner_clipper);

10
Userland/Libraries/LibWeb/Painting/BorderRadiusCornerClipper.h
View file

@ -18,12 +18,7 @@ enum class CornerClip {
class BorderRadiusCornerClipper : public RefCounted<BorderRadiusCornerClipper> {
public:
enum class UseCachedBitmap {
Yes,
No
};
static ErrorOr<NonnullRefPtr<BorderRadiusCornerClipper>> create(CornerRadii const&, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip = CornerClip::Outside, UseCachedBitmap use_cached_bitmap = UseCachedBitmap::Yes);
static ErrorOr<NonnullRefPtr<BorderRadiusCornerClipper>> create(CornerRadii const&, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip = CornerClip::Outside);
void sample_under_corners(Gfx::Painter& page_painter);
void blit_corner_clipping(Gfx::Painter& page_painter);
@ -38,7 +33,6 @@ public:
};
CornerLocations page_locations;
CornerLocations bitmap_locations;
DevicePixelSize corner_bitmap_size;
} m_data;
DevicePixelRect border_rect() const { return m_border_rect; }
@ -59,7 +53,7 @@ private:
};
struct ScopedCornerRadiusClip {
ScopedCornerRadiusClip(PaintContext& context, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip = CornerClip::Outside, BorderRadiusCornerClipper::UseCachedBitmap use_cached_bitmap = BorderRadiusCornerClipper::UseCachedBitmap::Yes);
ScopedCornerRadiusClip(PaintContext& context, DevicePixelRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip = CornerClip::Outside);
~ScopedCornerRadiusClip();

2
Userland/Libraries/LibWeb/Painting/PaintableBox.cpp
View file

@ -484,7 +484,7 @@ void PaintableBox::apply_clip_overflow_rect(PaintContext& context, PaintPhase ph
.bottom_left = border_radii_data.bottom_left.as_corner(context)
};
if (border_radii_data.has_any_radius()) {
auto corner_clipper = BorderRadiusCornerClipper::create(corner_radii, context.rounded_device_rect(*clip_rect), border_radii_data, CornerClip::Outside, BorderRadiusCornerClipper::UseCachedBitmap::No);
auto corner_clipper = BorderRadiusCornerClipper::create(corner_radii, context.rounded_device_rect(*clip_rect), border_radii_data, CornerClip::Outside);
if (corner_clipper.is_error()) {
dbgln("Failed to create overflow border-radius corner clipper: {}", corner_clipper.error());
return;