LibGfx: Move DisjointRectSet code into the header file

This is in preparation for converting it to a template. No changes here,
only moving code around.

Userland/Libraries/LibGfx/CMakeLists.txt

@@ -10,7 +10,6 @@ set(SOURCES
     Color.cpp
     CursorParams.cpp
     DDSLoader.cpp
-    DisjointRectSet.cpp
     Filters/ColorBlindnessFilter.cpp
     Filters/FastBoxBlurFilter.cpp
     Filters/LumaFilter.cpp

Userland/Libraries/LibGfx/DisjointRectSet.cpp

@@ -1,168 +0,0 @@
-/*
- * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <LibGfx/DisjointRectSet.h>
-
-namespace Gfx {
-
-bool DisjointRectSet::add_no_shatter(IntRect const& new_rect)
-{
-    if (new_rect.is_empty())
-        return false;
-    for (auto& rect : m_rects) {
-        if (rect.contains(new_rect))
-            return false;
-    }
-
-    m_rects.append(new_rect);
-    return true;
-}
-
-void DisjointRectSet::shatter()
-{
-    Vector<IntRect, 32> output;
-    output.ensure_capacity(m_rects.size());
-    bool pass_had_intersections = false;
-    do {
-        pass_had_intersections = false;
-        output.clear_with_capacity();
-        for (size_t i = 0; i < m_rects.size(); ++i) {
-            auto& r1 = m_rects[i];
-            for (size_t j = 0; j < m_rects.size(); ++j) {
-                if (i == j)
-                    continue;
-                auto& r2 = m_rects[j];
-                if (!r1.intersects(r2))
-                    continue;
-                pass_had_intersections = true;
-                auto pieces = r1.shatter(r2);
-                for (auto& piece : pieces)
-                    output.append(piece);
-                m_rects.remove(i);
-                for (; i < m_rects.size(); ++i)
-                    output.append(m_rects[i]);
-                goto next_pass;
-            }
-            output.append(r1);
-        }
-    next_pass:
-        swap(output, m_rects);
-    } while (pass_had_intersections);
-}
-
-void DisjointRectSet::move_by(int dx, int dy)
-{
-    for (auto& r : m_rects)
-        r.translate_by(dx, dy);
-}
-
-bool DisjointRectSet::contains(IntRect const& rect) const
-{
-    if (is_empty() || rect.is_empty())
-        return false;
-
-    // TODO: This could use some optimization
-    DisjointRectSet remainder(rect);
-    for (auto& r : m_rects) {
-        auto shards = remainder.shatter(r);
-        if (shards.is_empty())
-            return true;
-        remainder = move(shards);
-    }
-    return false;
-}
-
-bool DisjointRectSet::intersects(IntRect const& rect) const
-{
-    for (auto& r : m_rects) {
-        if (r.intersects(rect))
-            return true;
-    }
-    return false;
-}
-
-bool DisjointRectSet::intersects(DisjointRectSet const& rects) const
-{
-    if (this == &rects)
-        return true;
-
-    for (auto& r : m_rects) {
-        for (auto& r2 : rects.m_rects) {
-            if (r.intersects(r2))
-                return true;
-        }
-    }
-    return false;
-}
-
-DisjointRectSet DisjointRectSet::intersected(IntRect const& rect) const
-{
-    DisjointRectSet intersected_rects;
-    intersected_rects.m_rects.ensure_capacity(m_rects.capacity());
-    for (auto& r : m_rects) {
-        auto intersected_rect = r.intersected(rect);
-        if (!intersected_rect.is_empty())
-            intersected_rects.m_rects.append(intersected_rect);
-    }
-    // Since there should be no overlaps, we don't need to call shatter()
-    return intersected_rects;
-}
-
-DisjointRectSet DisjointRectSet::intersected(DisjointRectSet const& rects) const
-{
-    if (&rects == this)
-        return clone();
-    if (is_empty() || rects.is_empty())
-        return {};
-
-    DisjointRectSet intersected_rects;
-    intersected_rects.m_rects.ensure_capacity(m_rects.capacity());
-    for (auto& r : m_rects) {
-        for (auto& r2 : rects.m_rects) {
-            auto intersected_rect = r.intersected(r2);
-            if (!intersected_rect.is_empty())
-                intersected_rects.m_rects.append(intersected_rect);
-        }
-    }
-    // Since there should be no overlaps, we don't need to call shatter()
-    return intersected_rects;
-}
-
-DisjointRectSet DisjointRectSet::shatter(IntRect const& hammer) const
-{
-    if (hammer.is_empty())
-        return clone();
-
-    DisjointRectSet shards;
-    for (auto& rect : m_rects) {
-        for (auto& shard : rect.shatter(hammer))
-            shards.add_no_shatter(shard);
-    }
-    // Since there should be no overlaps, we don't need to call shatter()
-    return shards;
-}
-
-DisjointRectSet DisjointRectSet::shatter(DisjointRectSet const& hammer) const
-{
-    if (this == &hammer)
-        return {};
-    if (hammer.is_empty() || !intersects(hammer))
-        return clone();
-
-    // TODO: This could use some optimization
-    DisjointRectSet shards = shatter(hammer.m_rects[0]);
-    auto rects_count = hammer.m_rects.size();
-    for (size_t i = 1; i < rects_count && !shards.is_empty(); i++) {
-        if (hammer.m_rects[i].intersects(shards.m_rects)) {
-            auto shattered = shards.shatter(hammer.m_rects[i]);
-            shards = move(shattered);
-        }
-    }
-    // Since there should be no overlaps, we don't need to call shatter()
-    return shards;
-}
-
-}

Userland/Libraries/LibGfx/DisjointRectSet.h

@@ -35,7 +35,11 @@ public:
         return rects;
     }
 
-    void move_by(int dx, int dy);
+    void move_by(int dx, int dy)
+    {
+        for (auto& r : m_rects)
+            r.translate_by(dx, dy);
+    }
     void move_by(IntPoint const& delta)
     {
         move_by(delta.x(), delta.y());
@@ -70,14 +74,108 @@ public:
         }
     }
 
-    DisjointRectSet shatter(IntRect const&) const;
-    DisjointRectSet shatter(DisjointRectSet const& hammer) const;
+    DisjointRectSet shatter(IntRect const& hammer) const
+    {
+        if (hammer.is_empty())
+            return clone();
+
+        DisjointRectSet shards;
+        for (auto& rect : m_rects) {
+            for (auto& shard : rect.shatter(hammer))
+                shards.add_no_shatter(shard);
+        }
+        // Since there should be no overlaps, we don't need to call shatter()
+        return shards;
+    }
+    DisjointRectSet shatter(DisjointRectSet const& hammer) const
+    {
+        if (this == &hammer)
+            return {};
+        if (hammer.is_empty() || !intersects(hammer))
+            return clone();
+
+        // TODO: This could use some optimization
+        DisjointRectSet shards = shatter(hammer.m_rects[0]);
+        auto rects_count = hammer.m_rects.size();
+        for (size_t i = 1; i < rects_count && !shards.is_empty(); i++) {
+            if (hammer.m_rects[i].intersects(shards.m_rects)) {
+                auto shattered = shards.shatter(hammer.m_rects[i]);
+                shards = move(shattered);
+            }
+        }
+        // Since there should be no overlaps, we don't need to call shatter()
+        return shards;
+    }
+
+    bool contains(IntRect const& rect) const
+    {
+        if (is_empty() || rect.is_empty())
+            return false;
+
+        // TODO: This could use some optimization
+        DisjointRectSet remainder(rect);
+        for (auto& r : m_rects) {
+            auto shards = remainder.shatter(r);
+            if (shards.is_empty())
+                return true;
+            remainder = move(shards);
+        }
+        return false;
+    }
+
+    bool intersects(IntRect const& rect) const
+    {
+        for (auto& r : m_rects) {
+            if (r.intersects(rect))
+                return true;
+        }
+        return false;
+    }
+    bool intersects(DisjointRectSet const& rects) const
+    {
+        if (this == &rects)
+            return true;
+
+        for (auto& r : m_rects) {
+            for (auto& r2 : rects.m_rects) {
+                if (r.intersects(r2))
+                    return true;
+            }
+        }
+        return false;
+    }
+
+    DisjointRectSet intersected(IntRect const& rect) const
+    {
+        DisjointRectSet intersected_rects;
+        intersected_rects.m_rects.ensure_capacity(m_rects.capacity());
+        for (auto& r : m_rects) {
+            auto intersected_rect = r.intersected(rect);
+            if (!intersected_rect.is_empty())
+                intersected_rects.m_rects.append(intersected_rect);
+        }
+        // Since there should be no overlaps, we don't need to call shatter()
+        return intersected_rects;
+    }
+    DisjointRectSet intersected(DisjointRectSet const& rects) const
+    {
+        if (&rects == this)
+            return clone();
+        if (is_empty() || rects.is_empty())
+            return {};
 
-    bool contains(IntRect const&) const;
-    bool intersects(IntRect const&) const;
-    bool intersects(DisjointRectSet const&) const;
-    DisjointRectSet intersected(IntRect const&) const;
-    DisjointRectSet intersected(DisjointRectSet const&) const;
+        DisjointRectSet intersected_rects;
+        intersected_rects.m_rects.ensure_capacity(m_rects.capacity());
+        for (auto& r : m_rects) {
+            for (auto& r2 : rects.m_rects) {
+                auto intersected_rect = r.intersected(r2);
+                if (!intersected_rect.is_empty())
+                    intersected_rects.m_rects.append(intersected_rect);
+            }
+        }
+        // Since there should be no overlaps, we don't need to call shatter()
+        return intersected_rects;
+    }
 
     template<typename Function>
     IterationDecision for_each_intersected(IntRect const& rect, Function f) const
@@ -141,8 +239,50 @@ public:
     }
 
 private:
-    bool add_no_shatter(IntRect const&);
-    void shatter();
+    bool add_no_shatter(IntRect const& new_rect)
+    {
+        if (new_rect.is_empty())
+            return false;
+        for (auto& rect : m_rects) {
+            if (rect.contains(new_rect))
+                return false;
+        }
+
+        m_rects.append(new_rect);
+        return true;
+    }
+
+    void shatter()
+    {
+        Vector<IntRect, 32> output;
+        output.ensure_capacity(m_rects.size());
+        bool pass_had_intersections = false;
+        do {
+            pass_had_intersections = false;
+            output.clear_with_capacity();
+            for (size_t i = 0; i < m_rects.size(); ++i) {
+                auto& r1 = m_rects[i];
+                for (size_t j = 0; j < m_rects.size(); ++j) {
+                    if (i == j)
+                        continue;
+                    auto& r2 = m_rects[j];
+                    if (!r1.intersects(r2))
+                        continue;
+                    pass_had_intersections = true;
+                    auto pieces = r1.shatter(r2);
+                    for (auto& piece : pieces)
+                        output.append(piece);
+                    m_rects.remove(i);
+                    for (; i < m_rects.size(); ++i)
+                        output.append(m_rects[i]);
+                    goto next_pass;
+                }
+                output.append(r1);
+            }
+        next_pass:
+            swap(output, m_rects);
+        } while (pass_had_intersections);
+    }
 
     Vector<IntRect, 32> m_rects;
 };