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LibWeb: Make PaintContext aware of CSS and DevicePixels
Store the ratio between device and CSS pixels on the PaintContext, so that it can convert between the two. Co-authored-by: MacDue <macdue@dueutil.tech>
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4 changed files with 93 additions and 5 deletions
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@ -1,5 +1,6 @@
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/*
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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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@ -8,9 +9,10 @@
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namespace Web {
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PaintContext::PaintContext(Gfx::Painter& painter, Palette const& palette)
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PaintContext::PaintContext(Gfx::Painter& painter, Palette const& palette, float 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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@ -32,4 +34,76 @@ void PaintContext::clear_svg_context()
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m_svg_context.clear();
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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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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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}
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