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https://github.com/RGBCube/serenity
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LibWeb: Add barebones CanvasGradient object
Also add the CanvasRenderingContext2D APIs to go along with it. Note that it can't be used for anything yet.
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10 changed files with 130 additions and 0 deletions
53
Userland/Libraries/LibWeb/HTML/CanvasGradient.cpp
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53
Userland/Libraries/LibWeb/HTML/CanvasGradient.cpp
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/*
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* Copyright (c) 2022, 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 <LibWeb/HTML/CanvasGradient.h>
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namespace Web::HTML {
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NonnullRefPtr<CanvasGradient> CanvasGradient::create_radial(double x0, double y0, double r0, double x1, double y1, double r1)
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{
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(void)x0;
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(void)y0;
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(void)r0;
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(void)x1;
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(void)y1;
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(void)r1;
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return adopt_ref(*new CanvasGradient(Type::Radial));
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}
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NonnullRefPtr<CanvasGradient> CanvasGradient::create_linear(double x0, double y0, double x1, double y1)
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{
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(void)x0;
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(void)y0;
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(void)x1;
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(void)y1;
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return adopt_ref(*new CanvasGradient(Type::Linear));
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}
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NonnullRefPtr<CanvasGradient> CanvasGradient::create_conic(double start_angle, double x, double y)
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{
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(void)start_angle;
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(void)x;
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(void)y;
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return adopt_ref(*new CanvasGradient(Type::Conic));
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}
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CanvasGradient::CanvasGradient(Type type)
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: m_type(type)
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{
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}
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CanvasGradient::~CanvasGradient()
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{
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}
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void CanvasGradient::add_color_stop(double offset, String const& color)
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{
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dbgln("CanvasGradient#addColorStop({}, '{}')", offset, color);
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}
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}
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40
Userland/Libraries/LibWeb/HTML/CanvasGradient.h
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40
Userland/Libraries/LibWeb/HTML/CanvasGradient.h
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/*
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* Copyright (c) 2022, 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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#pragma once
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#include <AK/RefCounted.h>
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#include <LibWeb/Bindings/Wrappable.h>
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namespace Web::HTML {
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class CanvasGradient final
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: public RefCounted<CanvasGradient>
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, public Bindings::Wrappable {
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public:
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using WrapperType = Bindings::CanvasGradientWrapper;
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enum class Type {
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Linear,
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Radial,
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Conic,
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};
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static NonnullRefPtr<CanvasGradient> create_radial(double x0, double y0, double r0, double x1, double y1, double r1);
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static NonnullRefPtr<CanvasGradient> create_linear(double x0, double y0, double x1, double y1);
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static NonnullRefPtr<CanvasGradient> create_conic(double start_angle, double x, double y);
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void add_color_stop(double offset, String const& color);
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~CanvasGradient();
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private:
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explicit CanvasGradient(Type);
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Type m_type {};
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};
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}
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5
Userland/Libraries/LibWeb/HTML/CanvasGradient.idl
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5
Userland/Libraries/LibWeb/HTML/CanvasGradient.idl
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[Exposed=(Window,Worker)]
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interface CanvasGradient {
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// opaque object
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undefined addColorStop(double offset, DOMString color);
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};
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@ -496,4 +496,19 @@ CanvasRenderingContext2D::PreparedText CanvasRenderingContext2D::prepare_text(St
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return prepared_text;
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}
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NonnullRefPtr<CanvasGradient> CanvasRenderingContext2D::create_radial_gradient(double x0, double y0, double r0, double x1, double y1, double r1)
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{
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return CanvasGradient::create_radial(x0, y0, r0, x1, y1, r1);
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}
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NonnullRefPtr<CanvasGradient> CanvasRenderingContext2D::create_linear_gradient(double x0, double y0, double x1, double y1)
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{
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return CanvasGradient::create_linear(x0, y0, x1, y1);
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}
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NonnullRefPtr<CanvasGradient> CanvasRenderingContext2D::create_conic_gradient(double start_angle, double x, double y)
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{
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return CanvasGradient::create_conic(start_angle, x, y);
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}
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}
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@ -14,6 +14,7 @@
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#include <LibGfx/Path.h>
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#include <LibWeb/Bindings/Wrappable.h>
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#include <LibWeb/DOM/ExceptionOr.h>
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#include <LibWeb/HTML/CanvasGradient.h>
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#include <LibWeb/Layout/InlineNode.h>
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#include <LibWeb/Layout/LineBox.h>
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@ -83,6 +84,10 @@ public:
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RefPtr<TextMetrics> measure_text(String const& text);
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NonnullRefPtr<CanvasGradient> create_radial_gradient(double x0, double y0, double r0, double x1, double y1, double r1);
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NonnullRefPtr<CanvasGradient> create_linear_gradient(double x0, double y0, double x1, double y1);
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NonnullRefPtr<CanvasGradient> create_conic_gradient(double start_angle, double x, double y);
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private:
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explicit CanvasRenderingContext2D(HTMLCanvasElement&);
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@ -40,4 +40,9 @@ interface CanvasRenderingContext2D {
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readonly attribute HTMLCanvasElement canvas;
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TextMetrics measureText(DOMString text);
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CanvasGradient createRadialGradient(double x0, double y0, double r0, double x1, double y1, double r1);
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CanvasGradient createLinearGradient(double x0, double y0, double x1, double y1);
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CanvasGradient createConicGradient(double startAngle, double x, double y);
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};
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