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655d9d1462
This fixes a plethora of rounding problems on many websites. In the future, we may want to replace this with fixed-point arithmetic (bug #18566) for performance (and consistency with other engines), but in the meantime this makes the web look a bit better. :^) There's a lot more things that could be converted to doubles, which would reduce the amount of casting necessary in this patch. We can do that incrementally, however.
150 lines
4.3 KiB
C++
150 lines
4.3 KiB
C++
/*
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* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, Sam Atkins <atkinssj@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/Painter.h>
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#include <LibWeb/Painting/PaintContext.h>
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namespace Web {
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PaintContext::PaintContext(Gfx::Painter& painter, Palette const& palette, double device_pixels_per_css_pixel)
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: m_painter(painter)
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, m_palette(palette)
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, m_device_pixels_per_css_pixel(device_pixels_per_css_pixel)
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{
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}
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SVGContext& PaintContext::svg_context()
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{
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// FIXME: This is a total hack to avoid crashing on content that has SVG elements embedded directly in HTML without an <svg> element.
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if (!m_svg_context.has_value())
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m_svg_context = SVGContext { {} };
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return m_svg_context.value();
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}
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void PaintContext::set_svg_context(SVGContext context)
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{
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m_svg_context = move(context);
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}
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void PaintContext::clear_svg_context()
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{
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m_svg_context.clear();
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}
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CSSPixelRect PaintContext::css_viewport_rect() const
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{
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return {
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m_device_viewport_rect.x().value() / m_device_pixels_per_css_pixel,
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m_device_viewport_rect.y().value() / m_device_pixels_per_css_pixel,
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m_device_viewport_rect.width().value() / m_device_pixels_per_css_pixel,
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m_device_viewport_rect.height().value() / m_device_pixels_per_css_pixel
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};
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}
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DevicePixels PaintContext::rounded_device_pixels(CSSPixels css_pixels) const
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{
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return roundf(css_pixels.value() * m_device_pixels_per_css_pixel);
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}
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DevicePixels PaintContext::enclosing_device_pixels(CSSPixels css_pixels) const
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{
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return ceilf(css_pixels.value() * m_device_pixels_per_css_pixel);
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}
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DevicePixels PaintContext::floored_device_pixels(CSSPixels css_pixels) const
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{
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return floorf(css_pixels.value() * m_device_pixels_per_css_pixel);
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}
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DevicePixelPoint PaintContext::rounded_device_point(CSSPixelPoint point) const
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{
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return {
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roundf(point.x().value() * m_device_pixels_per_css_pixel),
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roundf(point.y().value() * m_device_pixels_per_css_pixel)
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};
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}
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DevicePixelPoint PaintContext::floored_device_point(CSSPixelPoint point) const
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{
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return {
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floorf(point.x().value() * m_device_pixels_per_css_pixel),
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floorf(point.y().value() * m_device_pixels_per_css_pixel)
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};
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}
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DevicePixelRect PaintContext::enclosing_device_rect(CSSPixelRect rect) const
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{
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return {
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floorf(rect.x().value() * m_device_pixels_per_css_pixel),
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floorf(rect.y().value() * m_device_pixels_per_css_pixel),
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ceilf(rect.width().value() * m_device_pixels_per_css_pixel),
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ceilf(rect.height().value() * m_device_pixels_per_css_pixel)
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};
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}
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DevicePixelRect PaintContext::rounded_device_rect(CSSPixelRect rect) const
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{
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return {
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roundf(rect.x().value() * m_device_pixels_per_css_pixel),
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roundf(rect.y().value() * m_device_pixels_per_css_pixel),
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roundf(rect.width().value() * m_device_pixels_per_css_pixel),
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roundf(rect.height().value() * m_device_pixels_per_css_pixel)
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};
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}
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DevicePixelSize PaintContext::enclosing_device_size(CSSPixelSize size) const
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{
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return {
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ceilf(size.width().value() * m_device_pixels_per_css_pixel),
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ceilf(size.height().value() * m_device_pixels_per_css_pixel)
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};
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}
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DevicePixelSize PaintContext::rounded_device_size(CSSPixelSize size) const
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{
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return {
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roundf(size.width().value() * m_device_pixels_per_css_pixel),
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roundf(size.height().value() * m_device_pixels_per_css_pixel)
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};
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}
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CSSPixels PaintContext::scale_to_css_pixels(DevicePixels device_pixels) const
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{
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return device_pixels.value() / m_device_pixels_per_css_pixel;
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}
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CSSPixelPoint PaintContext::scale_to_css_point(DevicePixelPoint point) const
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{
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return {
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scale_to_css_pixels(point.x()),
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scale_to_css_pixels(point.y())
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};
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}
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CSSPixelSize PaintContext::scale_to_css_size(DevicePixelSize size) const
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{
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return {
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scale_to_css_pixels(size.width()),
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scale_to_css_pixels(size.height())
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};
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}
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CSSPixelRect PaintContext::scale_to_css_rect(DevicePixelRect rect) const
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{
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return {
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scale_to_css_point(rect.location()),
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scale_to_css_size(rect.size())
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};
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}
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bool PaintContext::would_be_fully_clipped_by_painter(DevicePixelRect rect) const
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{
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return !painter().clip_rect().intersects(rect.to_type<int>().translated(painter().translation()));
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}
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}
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