hle: nvflinger: Add implementation for Rect class.

src/core/CMakeLists.txt

@@ -539,6 +539,7 @@ add_library(core STATIC
     hle/service/nvflinger/buffer_queue.h
     hle/service/nvflinger/nvflinger.cpp
     hle/service/nvflinger/nvflinger.h
+    hle/service/nvflinger/ui/rect.h
     hle/service/olsc/olsc.cpp
     hle/service/olsc/olsc.h
     hle/service/pcie/pcie.cpp

src/core/hle/service/nvflinger/ui/rect.h

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright 2021 yuzu Emulator Project
+// Copyright 2006 The Android Open Source Project
+// Parts of this implementation were base on:
+// https://cs.android.com/android/platform/superproject/+/android-5.1.1_r38:frameworks/native/include/ui/Rect.h
+
+#pragma once
+
+#include <cstdint>
+#include <utility>
+
+#include "common/common_types.h"
+
+namespace android {
+
+class Rect final {
+public:
+    constexpr Rect() = default;
+
+    constexpr Rect(s32 width_, s32 height_) : right{width_}, bottom{height_} {}
+
+    constexpr s32 Left() const {
+        return left;
+    }
+
+    constexpr s32 Top() const {
+        return top;
+    }
+
+    constexpr s32 Right() const {
+        return right;
+    }
+
+    constexpr s32 Bottom() const {
+        return bottom;
+    }
+
+    constexpr bool IsEmpty() const {
+        return (GetWidth() <= 0) || (GetHeight() <= 0);
+    }
+
+    constexpr s32 GetWidth() const {
+        return right - left;
+    }
+
+    constexpr s32 GetHeight() const {
+        return bottom - top;
+    }
+
+    constexpr bool operator==(const Rect& rhs) const {
+        return (left == rhs.left) && (top == rhs.top) && (right == rhs.right) &&
+               (bottom == rhs.bottom);
+    }
+
+    constexpr bool operator!=(const Rect& rhs) const {
+        return !operator==(rhs);
+    }
+
+    constexpr bool Intersect(const Rect& with, Rect* result) const {
+        result->left = std::max(left, with.left);
+        result->top = std::max(top, with.top);
+        result->right = std::min(right, with.right);
+        result->bottom = std::min(bottom, with.bottom);
+        return !result->IsEmpty();
+    }
+
+private:
+    s32 left{};
+    s32 top{};
+    s32 right{};
+    s32 bottom{};
+};
+static_assert(sizeof(Rect) == 16, "Rect has wrong size");
+
+} // namespace android