mirror of
https://github.com/RGBCube/serenity
synced 2025-05-28 19:25:10 +00:00
360c0eb509
In general it is not safe to convert any arbitrary floating-point value to CSSPixels. CSSPixels has a resolution of 0.015625, which for small values (e.g. scale factors between 0 and 1), can produce bad results if converted to CSSPixels then scaled back up. In the worst case values can underflow to zero and produce incorrect results.
131 lines
3.9 KiB
C++
131 lines
3.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibGfx/Painter.h>
|
|
#include <LibWeb/Painting/PaintContext.h>
|
|
|
|
namespace Web {
|
|
|
|
PaintContext::PaintContext(Gfx::Painter& painter, Palette const& palette, double device_pixels_per_css_pixel)
|
|
: m_painter(painter)
|
|
, m_palette(palette)
|
|
, m_device_pixels_per_css_pixel(device_pixels_per_css_pixel)
|
|
{
|
|
}
|
|
|
|
CSSPixelRect PaintContext::css_viewport_rect() const
|
|
{
|
|
return {
|
|
m_device_viewport_rect.x().value() / m_device_pixels_per_css_pixel,
|
|
m_device_viewport_rect.y().value() / m_device_pixels_per_css_pixel,
|
|
m_device_viewport_rect.width().value() / m_device_pixels_per_css_pixel,
|
|
m_device_viewport_rect.height().value() / m_device_pixels_per_css_pixel
|
|
};
|
|
}
|
|
|
|
DevicePixels PaintContext::rounded_device_pixels(CSSPixels css_pixels) const
|
|
{
|
|
return round(css_pixels.to_double() * m_device_pixels_per_css_pixel);
|
|
}
|
|
|
|
DevicePixels PaintContext::enclosing_device_pixels(CSSPixels css_pixels) const
|
|
{
|
|
return ceil(css_pixels.to_double() * m_device_pixels_per_css_pixel);
|
|
}
|
|
|
|
DevicePixels PaintContext::floored_device_pixels(CSSPixels css_pixels) const
|
|
{
|
|
return floor(css_pixels.to_double() * m_device_pixels_per_css_pixel);
|
|
}
|
|
|
|
DevicePixelPoint PaintContext::rounded_device_point(CSSPixelPoint point) const
|
|
{
|
|
return {
|
|
round(point.x().to_double() * m_device_pixels_per_css_pixel),
|
|
round(point.y().to_double() * m_device_pixels_per_css_pixel)
|
|
};
|
|
}
|
|
|
|
DevicePixelPoint PaintContext::floored_device_point(CSSPixelPoint point) const
|
|
{
|
|
return {
|
|
floor(point.x().to_double() * m_device_pixels_per_css_pixel),
|
|
floor(point.y().to_double() * m_device_pixels_per_css_pixel)
|
|
};
|
|
}
|
|
|
|
DevicePixelRect PaintContext::enclosing_device_rect(CSSPixelRect rect) const
|
|
{
|
|
return {
|
|
floor(rect.x().to_double() * m_device_pixels_per_css_pixel),
|
|
floor(rect.y().to_double() * m_device_pixels_per_css_pixel),
|
|
ceil(rect.width().to_double() * m_device_pixels_per_css_pixel),
|
|
ceil(rect.height().to_double() * m_device_pixels_per_css_pixel)
|
|
};
|
|
}
|
|
|
|
DevicePixelRect PaintContext::rounded_device_rect(CSSPixelRect rect) const
|
|
{
|
|
return {
|
|
round(rect.x().to_double() * m_device_pixels_per_css_pixel),
|
|
round(rect.y().to_double() * m_device_pixels_per_css_pixel),
|
|
round(rect.width().to_double() * m_device_pixels_per_css_pixel),
|
|
round(rect.height().to_double() * m_device_pixels_per_css_pixel)
|
|
};
|
|
}
|
|
|
|
DevicePixelSize PaintContext::enclosing_device_size(CSSPixelSize size) const
|
|
{
|
|
return {
|
|
ceil(size.width().to_double() * m_device_pixels_per_css_pixel),
|
|
ceil(size.height().to_double() * m_device_pixels_per_css_pixel)
|
|
};
|
|
}
|
|
|
|
DevicePixelSize PaintContext::rounded_device_size(CSSPixelSize size) const
|
|
{
|
|
return {
|
|
round(size.width().to_double() * m_device_pixels_per_css_pixel),
|
|
round(size.height().to_double() * m_device_pixels_per_css_pixel)
|
|
};
|
|
}
|
|
|
|
CSSPixels PaintContext::scale_to_css_pixels(DevicePixels device_pixels) const
|
|
{
|
|
return CSSPixels(device_pixels.value() / m_device_pixels_per_css_pixel);
|
|
}
|
|
|
|
CSSPixelPoint PaintContext::scale_to_css_point(DevicePixelPoint point) const
|
|
{
|
|
return {
|
|
scale_to_css_pixels(point.x()),
|
|
scale_to_css_pixels(point.y())
|
|
};
|
|
}
|
|
|
|
CSSPixelSize PaintContext::scale_to_css_size(DevicePixelSize size) const
|
|
{
|
|
return {
|
|
scale_to_css_pixels(size.width()),
|
|
scale_to_css_pixels(size.height())
|
|
};
|
|
}
|
|
|
|
CSSPixelRect PaintContext::scale_to_css_rect(DevicePixelRect rect) const
|
|
{
|
|
return {
|
|
scale_to_css_point(rect.location()),
|
|
scale_to_css_size(rect.size())
|
|
};
|
|
}
|
|
|
|
bool PaintContext::would_be_fully_clipped_by_painter(DevicePixelRect rect) const
|
|
{
|
|
return !painter().clip_rect().intersects(rect.to_type<int>().translated(painter().translation()));
|
|
}
|
|
|
|
}
|