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serenity/Userland/Libraries/LibWeb/Layout/CanvasBox.cpp
Andreas Kling 7d5d5b387e LibWeb: Respect CSS image-rendering mode when painting canvas elements
If the content wants to be pixelated, we should honor that and paint
with nearest-neighbor scaling. The fact that it's faster is a nice bonus
as well. :^)
2022-03-06 01:51:18 +01:00

46 lines
1.3 KiB
C++

/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGfx/Painter.h>
#include <LibWeb/Layout/CanvasBox.h>
namespace Web::Layout {
CanvasBox::CanvasBox(DOM::Document& document, HTML::HTMLCanvasElement& element, NonnullRefPtr<CSS::StyleProperties> style)
: ReplacedBox(document, element, move(style))
{
}
CanvasBox::~CanvasBox()
{
}
void CanvasBox::prepare_for_replaced_layout()
{
set_intrinsic_width(dom_node().width());
set_intrinsic_height(dom_node().height());
}
void CanvasBox::paint(PaintContext& context, PaintPhase phase)
{
if (!is_visible())
return;
ReplacedBox::paint(context, phase);
if (phase == PaintPhase::Foreground) {
// FIXME: This should be done at a different level. Also rect() does not include padding etc!
if (!context.viewport_rect().intersects(enclosing_int_rect(absolute_rect())))
return;
if (dom_node().bitmap()) {
auto scaling_mode = computed_values().image_rendering() == CSS::ImageRendering::Pixelated ? Gfx::Painter::ScalingMode::NearestNeighbor : Gfx::Painter::ScalingMode::BilinearBlend;
context.painter().draw_scaled_bitmap(rounded_int_rect(absolute_rect()), *dom_node().bitmap(), dom_node().bitmap()->rect(), 1.0f, scaling_mode);
}
}
}
}