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c8c065b6b0
This moves the CSS gradient painting to the painter creating:
- Painter::fill_rect_with_linear_gradient()
- Painter::fill_rect_with_conic_gradient()
- Painter::fill_rect_with_radial_gradient()
This has a few benefits:
- The gradients can now easily respect the painter scale
- The Painter::fill_pixels() escape hatch can be removed
- We can remove the old fixed color stop gradient code
- The old functions are now just a shim
- Anywhere can now easily use this gradient painting code!
This only leaves the color stop resolution in LibWeb (which is fine).
Just means in LibGfx you have to actually specify color stop positions.
(Also while here add a small optimization to avoid generating
excessively long gradient lines)
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
/*
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* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Span.h>
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#include <AK/Vector.h>
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#include <LibGfx/Color.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Painting/PaintContext.h>
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namespace Web::Painting {
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using ColorStopList = Vector<Gfx::ColorStop, 4>;
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struct ColorStopData {
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ColorStopList list;
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Optional<float> repeat_length;
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};
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struct LinearGradientData {
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float gradient_angle;
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ColorStopData color_stops;
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};
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struct ConicGradientData {
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float start_angle;
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ColorStopData color_stops;
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};
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struct RadialGradientData {
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ColorStopData color_stops;
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};
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LinearGradientData resolve_linear_gradient_data(Layout::Node const&, CSSPixelSize, CSS::LinearGradientStyleValue const&);
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ConicGradientData resolve_conic_gradient_data(Layout::Node const&, CSS::ConicGradientStyleValue const&);
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RadialGradientData resolve_radial_gradient_data(Layout::Node const&, CSSPixelSize, CSS::RadialGradientStyleValue const&);
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void paint_linear_gradient(PaintContext&, DevicePixelRect const&, LinearGradientData const&);
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void paint_conic_gradient(PaintContext&, DevicePixelRect const&, ConicGradientData const&, DevicePixelPoint position);
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void paint_radial_gradient(PaintContext&, DevicePixelRect const&, RadialGradientData const&, DevicePixelPoint position, DevicePixelSize size);
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}
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