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https://github.com/RGBCube/serenity
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e63f68661f
This allows the painting subsystem to request a bitmap with the exact size needed for painting, instead of being limited to "just give me a bitmap" (which was perfectly enough for raster images, but not for vector graphics).
78 lines
3 KiB
C++
78 lines
3 KiB
C++
/*
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* Copyright (c) 2018-2023, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/StylePainter.h>
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#include <LibWeb/HTML/DecodedImageData.h>
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#include <LibWeb/HTML/HTMLImageElement.h>
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#include <LibWeb/HTML/ImageRequest.h>
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#include <LibWeb/Layout/ImageBox.h>
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#include <LibWeb/Painting/BorderRadiusCornerClipper.h>
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#include <LibWeb/Painting/ImagePaintable.h>
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#include <LibWeb/Platform/FontPlugin.h>
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namespace Web::Painting {
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JS::NonnullGCPtr<ImagePaintable> ImagePaintable::create(Layout::ImageBox const& layout_box)
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{
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return layout_box.heap().allocate_without_realm<ImagePaintable>(layout_box);
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}
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ImagePaintable::ImagePaintable(Layout::ImageBox const& layout_box)
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: PaintableBox(layout_box)
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{
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browsing_context().register_viewport_client(*this);
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}
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void ImagePaintable::finalize()
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{
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Base::finalize();
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// NOTE: We unregister from the browsing context in finalize() to avoid trouble
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// in the scenario where our BrowsingContext has already been swept by GC.
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browsing_context().unregister_viewport_client(*this);
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}
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Layout::ImageBox const& ImagePaintable::layout_box() const
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{
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return static_cast<Layout::ImageBox const&>(layout_node());
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}
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void ImagePaintable::paint(PaintContext& context, PaintPhase phase) const
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{
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if (!is_visible())
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return;
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// FIXME: This should be done at a different level.
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if (is_out_of_view(context))
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return;
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PaintableBox::paint(context, phase);
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if (phase == PaintPhase::Foreground) {
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auto image_rect = context.rounded_device_rect(absolute_rect());
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if (layout_box().renders_as_alt_text()) {
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auto& image_element = verify_cast<HTML::HTMLImageElement>(*dom_node());
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auto enclosing_rect = context.enclosing_device_rect(absolute_rect()).to_type<int>();
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context.painter().set_font(Platform::FontPlugin::the().default_font());
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Gfx::StylePainter::paint_frame(context.painter(), enclosing_rect, context.palette(), Gfx::FrameStyle::SunkenContainer);
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auto alt = image_element.alt();
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if (alt.is_empty())
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alt = image_element.src();
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context.painter().draw_text(enclosing_rect, alt, Gfx::TextAlignment::Center, computed_values().color(), Gfx::TextElision::Right);
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} else if (auto bitmap = layout_box().image_provider().current_image_bitmap(image_rect.size().to_type<int>())) {
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ScopedCornerRadiusClip corner_clip { context, context.painter(), image_rect, normalized_border_radii_data(ShrinkRadiiForBorders::Yes) };
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auto scaling_mode = to_gfx_scaling_mode(computed_values().image_rendering(), bitmap->rect(), image_rect.to_type<int>());
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context.painter().draw_scaled_bitmap(image_rect.to_type<int>(), *bitmap, bitmap->rect(), 1.f, scaling_mode);
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}
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}
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}
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void ImagePaintable::browsing_context_did_set_viewport_rect(CSSPixelRect const& viewport_rect)
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{
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const_cast<Layout::ImageProvider&>(layout_box().image_provider()).set_visible_in_viewport(viewport_rect.intersects(absolute_rect()));
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}
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}
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