Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89 Commit: 93712b24bf Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256 Reviewed-by: https://github.com/sideshowbarker
2025-07-30 12:49:19 +00:00 · 2024-11-09 12:25:08 -05:00 · 2024-11-09 12:25:08 -05:00 · 93712b24bf · 2024-11-10 11:51:52 +00:00
commit 93712b24bf
parent 950e819ee7
4547 changed files with 104 additions and 113 deletions
--- a/Libraries/LibWeb/HTML/Canvas/CanvasTransform.h
+++ b/Libraries/LibWeb/HTML/Canvas/CanvasTransform.h
@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2020-2022, Andreas Kling <andreas@ladybird.org>
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Debug.h>
+#include <LibGfx/Painter.h>
+#include <LibWeb/Geometry/DOMMatrix.h>
+#include <LibWeb/HTML/Canvas/CanvasPath.h>
+#include <LibWeb/HTML/Canvas/CanvasState.h>
+
+namespace Web::HTML {
+
+// https://html.spec.whatwg.org/multipage/canvas.html#canvastransform
+template<typename IncludingClass>
+class CanvasTransform {
+public:
+    ~CanvasTransform() = default;
+
+    Gfx::Path& mutable_path() { return static_cast<IncludingClass&>(*this).path(); }
+
+    void scale(float sx, float sy)
+    {
+        dbgln_if(CANVAS_RENDERING_CONTEXT_2D_DEBUG, "CanvasTransform::scale({}, {})", sx, sy);
+        if (!isfinite(sx) || !isfinite(sy))
+            return;
+        my_drawing_state().transform.scale(sx, sy);
+        flush_transform();
+        mutable_path().transform(Gfx::AffineTransform().scale(1.0 / sx, 1.0 / sy));
+    }
+
+    void translate(float tx, float ty)
+    {
+        dbgln_if(CANVAS_RENDERING_CONTEXT_2D_DEBUG, "CanvasTransform::translate({}, {})", tx, ty);
+        if (!isfinite(tx) || !isfinite(ty))
+            return;
+        my_drawing_state().transform.translate(tx, ty);
+        flush_transform();
+        mutable_path().transform(Gfx::AffineTransform().translate(-tx, -ty));
+    }
+
+    void rotate(float radians)
+    {
+        dbgln_if(CANVAS_RENDERING_CONTEXT_2D_DEBUG, "CanvasTransform::rotate({})", radians);
+        if (!isfinite(radians))
+            return;
+        my_drawing_state().transform.rotate_radians(radians);
+        flush_transform();
+        mutable_path().transform(Gfx::AffineTransform().rotate_radians(-radians));
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-transform
+    void transform(double a, double b, double c, double d, double e, double f)
+    {
+        // 1. If any of the arguments are infinite or NaN, then return.
+        if (!isfinite(a) || !isfinite(b) || !isfinite(c) || !isfinite(d) || !isfinite(e) || !isfinite(f))
+            return;
+
+        // 2. Replace the current transformation matrix with the result of multiplying the current transformation matrix with the matrix described by:
+        //    a c e
+        //    b d f
+        //    0 0 1
+        auto transform = Gfx::AffineTransform(a, b, c, d, e, f);
+        my_drawing_state().transform.multiply(transform);
+
+        if (auto inverse = transform.inverse(); inverse.has_value()) {
+            mutable_path().transform(inverse.value());
+        }
+        flush_transform();
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-gettransform
+    WebIDL::ExceptionOr<JS::NonnullGCPtr<Geometry::DOMMatrix>> get_transform()
+    {
+        auto& realm = static_cast<IncludingClass&>(*this).realm();
+        auto transform = my_drawing_state().transform;
+        Geometry::DOMMatrix2DInit init = { transform.a(), transform.b(), transform.c(), transform.d(), transform.e(), transform.f(), {}, {}, {}, {}, {}, {} };
+        return Geometry::DOMMatrix::create_from_dom_matrix_2d_init(realm, init);
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-settransform
+    void set_transform(double a, double b, double c, double d, double e, double f)
+    {
+        // 1. If any of the arguments are infinite or NaN, then return.
+        if (!isfinite(a) || !isfinite(b) || !isfinite(c) || !isfinite(d) || !isfinite(e) || !isfinite(f))
+            return;
+
+        // 2. Reset the current transformation matrix to the identity matrix.
+        my_drawing_state().transform = {};
+        flush_transform();
+
+        // 3. Invoke the transform(a, b, c, d, e, f) method with the same arguments.
+        transform(a, b, c, d, e, f);
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-settransform-matrix
+    WebIDL::ExceptionOr<void> set_transform(Geometry::DOMMatrix2DInit& init)
+    {
+        // 1. Let matrix be the result of creating a DOMMatrix from the 2D dictionary transform.
+        auto& realm = static_cast<IncludingClass&>(*this).realm();
+        auto matrix = TRY(Geometry::DOMMatrix::create_from_dom_matrix_2d_init(realm, init));
+
+        // 2. If one or more of matrix's m11 element, m12 element, m21 element, m22 element, m41 element, or m42 element are infinite or NaN, then return.
+        if (!isfinite(matrix->m11()) || !isfinite(matrix->m12()) || !isfinite(matrix->m21()) || !isfinite(matrix->m22()) || !isfinite(matrix->m41()) || !isfinite(matrix->m42()))
+            return {};
+
+        auto original_transform = my_drawing_state().transform;
+
+        // 3. Reset the current transformation matrix to matrix.
+        auto transform = Gfx::AffineTransform { static_cast<float>(matrix->a()), static_cast<float>(matrix->b()), static_cast<float>(matrix->c()), static_cast<float>(matrix->d()), static_cast<float>(matrix->e()), static_cast<float>(matrix->f()) };
+        my_drawing_state().transform = transform;
+
+        mutable_path().transform(original_transform);
+
+        flush_transform();
+        return {};
+    }
+
+    // https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-resettransform
+    void reset_transform()
+    {
+        // The resetTransform() method, when invoked, must reset the current transformation matrix to the identity matrix.
+        my_drawing_state().transform = {};
+        flush_transform();
+    }
+
+    void flush_transform()
+    {
+        if (auto* painter = static_cast<IncludingClass&>(*this).painter())
+            painter->set_transform(my_drawing_state().transform);
+    }
+
+protected:
+    CanvasTransform() = default;
+
+private:
+    CanvasState::DrawingState& my_drawing_state() { return reinterpret_cast<IncludingClass&>(*this).drawing_state(); }
+    CanvasState::DrawingState const& my_drawing_state() const { return reinterpret_cast<IncludingClass const&>(*this).drawing_state(); }
+};
+
+}