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1 files changed, 268 insertions, 0 deletions

diff --git a/include/cru/platform/GraphicsBase.hpp b/include/cru/platform/GraphicsBase.hpp
new file mode 100644
index 00000000..e7201ec0
--- /dev/null
+++ b/include/cru/platform/GraphicsBase.hpp
@@ -0,0 +1,268 @@
+#pragma once
+#include "cru/common/Base.hpp"
+
+#include "cru/common/Range.hpp"
+#include "cru/common/String.hpp"
+
+#include <cstdint>
+#include <limits>
+#include <optional>
+#include <string>
+#include <utility>
+
+namespace cru::platform {
+struct Size;
+
+struct Point final {
+  constexpr Point() = default;
+  constexpr Point(const float x, const float y) : x(x), y(y) {}
+  explicit constexpr Point(const Size& size);
+
+  constexpr Point& operator+=(const Point& other) {
+    this->x += other.x;
+    this->y += other.y;
+    return *this;
+  }
+
+  float x = 0;
+  float y = 0;
+};
+
+constexpr Point operator+(const Point& left, const Point& right) {
+  return Point(left.x + right.x, left.y + right.y);
+}
+
+constexpr Point operator-(const Point& left, const Point& right) {
+  return Point(left.x - right.x, left.y - right.y);
+}
+
+constexpr bool operator==(const Point& left, const Point& right) {
+  return left.x == right.x && left.y == right.y;
+}
+
+constexpr bool operator!=(const Point& left, const Point& right) {
+  return !(left == right);
+}
+
+inline String ToString(const Point& point) {
+  return Format(u"(x: {}, y: {})", point.x, point.y);
+}
+
+struct Size final {
+  constexpr Size() = default;
+  constexpr Size(const float width, const float height)
+      : width(width), height(height) {}
+  explicit constexpr Size(const Point& point)
+      : width(point.x), height(point.y) {}
+
+  constexpr static Size Infinate() {
+    return Size{std::numeric_limits<float>::max(),
+                std::numeric_limits<float>::max()};
+  }
+
+  float width = 0;
+  float height = 0;
+};
+
+constexpr Point::Point(const Size& size) : x(size.width), y(size.height) {}
+
+constexpr Size operator+(const Size& left, const Size& right) {
+  return Size(left.width + right.width, left.height + right.height);
+}
+
+constexpr Size operator-(const Size& left, const Size& right) {
+  return Size(left.width - right.width, left.height - right.height);
+}
+
+constexpr bool operator==(const Size& left, const Size& right) {
+  return left.width == right.width && left.height == right.height;
+}
+
+constexpr bool operator!=(const Size& left, const Size& right) {
+  return !(left == right);
+}
+
+inline String ToString(const Size& size) {
+  return Format(u"(width: {}, height: {})", size.width, size.height);
+}
+
+struct Thickness final {
+  constexpr Thickness() : Thickness(0) {}
+
+  constexpr explicit Thickness(const float width)
+      : left(width), top(width), right(width), bottom(width) {}
+
+  constexpr explicit Thickness(const float horizontal, const float vertical)
+      : left(horizontal), top(vertical), right(horizontal), bottom(vertical) {}
+
+  constexpr Thickness(const float left, const float top, const float right,
+                      const float bottom)
+      : left(left), top(top), right(right), bottom(bottom) {}
+
+  constexpr float GetHorizontalTotal() const { return left + right; }
+
+  constexpr float GetVerticalTotal() const { return top + bottom; }
+
+  void SetLeftRight(const float value) { left = right = value; }
+
+  void SetTopBottom(const float value) { top = bottom = value; }
+
+  void SetAll(const float value) { left = top = right = bottom = value; }
+
+  constexpr float Validate() const {
+    return left >= 0.0 && top >= 0.0 && right >= 0.0 && bottom >= 0.0;
+  }
+
+  float left;
+  float top;
+  float right;
+  float bottom;
+};
+
+constexpr Size operator+(const Size& size, const Thickness& thickness) {
+  return {size.width + thickness.left + thickness.right,
+          size.height + thickness.top + thickness.bottom};
+}
+
+constexpr Size operator+(const Thickness& thickness, const Size& size) {
+  return operator+(size, thickness);
+}
+
+constexpr Thickness operator+(const Thickness& left, const Thickness& right) {
+  return {left.left + right.left, left.top + right.top,
+          left.right + right.right, left.bottom + right.bottom};
+}
+
+constexpr bool operator==(const Thickness& left, const Thickness& right) {
+  return left.left == right.left && left.top == right.top &&
+         left.right == right.right && left.bottom == right.bottom;
+}
+
+constexpr bool operator!=(const Thickness& left, const Thickness& right) {
+  return !(left == right);
+}
+
+struct Rect final {
+  constexpr Rect() = default;
+  constexpr Rect(const float left, const float top, const float width,
+                 const float height)
+      : left(left), top(top), width(width), height(height) {}
+  constexpr Rect(const Point& lefttop, const Size& size)
+      : left(lefttop.x),
+        top(lefttop.y),
+        width(size.width),
+        height(size.height) {}
+
+  constexpr static Rect FromVertices(const float left, const float top,
+                                     const float right, const float bottom) {
+    return Rect(left, top, right - left, bottom - top);
+  }
+
+  constexpr static Rect FromCenter(const Point& center, const float width,
+                                   const float height) {
+    return Rect(center.x - width / 2.0f, center.y - height / 2.0f, width,
+                height);
+  }
+
+  constexpr float GetRight() const { return left + width; }
+
+  constexpr float GetBottom() const { return top + height; }
+
+  constexpr Point GetLeftTop() const { return Point(left, top); }
+
+  constexpr Point GetRightBottom() const {
+    return Point(left + width, top + height);
+  }
+
+  constexpr Point GetLeftBottom() const { return Point(left, top + height); }
+
+  constexpr Point GetRightTop() const { return Point(left + width, top); }
+
+  constexpr Point GetCenter() const {
+    return Point(left + width / 2.0f, top + height / 2.0f);
+  }
+
+  constexpr Size GetSize() const { return Size(width, height); }
+
+  constexpr Rect Expand(const Thickness& thickness) const {
+    return Rect(left - thickness.left, top - thickness.top,
+                width + thickness.GetHorizontalTotal(),
+                height + thickness.GetVerticalTotal());
+  }
+
+  constexpr Rect Shrink(const Thickness& thickness) const {
+    return Rect(left + thickness.left, top + thickness.top,
+                width - thickness.GetHorizontalTotal(),
+                height - thickness.GetVerticalTotal());
+  }
+
+  constexpr bool IsPointInside(const Point& point) const {
+    return point.x >= left && point.x < GetRight() && point.y >= top &&
+           point.y < GetBottom();
+  }
+
+  float left = 0.0f;
+  float top = 0.0f;
+  float width = 0.0f;
+  float height = 0.0f;
+};
+
+constexpr bool operator==(const Rect& left, const Rect& right) {
+  return left.left == right.left && left.top == right.top &&
+         left.width == right.width && left.height == right.height;
+}
+
+constexpr bool operator!=(const Rect& left, const Rect& right) {
+  return !(left == right);
+}
+
+struct RoundedRect final {
+  constexpr RoundedRect() = default;
+  constexpr RoundedRect(const Rect& rect, const float radius_x,
+                        const float radius_y)
+      : rect(rect), radius_x(radius_x), radius_y(radius_y) {}
+
+  Rect rect{};
+  float radius_x = 0.0f;
+  float radius_y = 0.0f;
+};
+
+constexpr bool operator==(const RoundedRect& left, const RoundedRect& right) {
+  return left.rect == right.rect && left.radius_x == right.radius_x &&
+         left.radius_y == right.radius_y;
+}
+
+constexpr bool operator!=(const RoundedRect& left, const RoundedRect& right) {
+  return !(left == right);
+}
+
+struct Ellipse final {
+  constexpr Ellipse() = default;
+  constexpr Ellipse(const Point& center, const float radius_x,
+                    const float radius_y)
+      : center(center), radius_x(radius_x), radius_y(radius_y) {}
+
+  constexpr static Ellipse FromRect(const Rect& rect) {
+    return Ellipse(rect.GetCenter(), rect.width / 2.0f, rect.height / 2.0f);
+  }
+
+  constexpr Rect GetBoundRect() const {
+    return Rect::FromCenter(center, radius_x * 2.0f, radius_y * 2.0f);
+  }
+
+  Point center{};
+  float radius_x = 0.0f;
+  float radius_y = 0.0f;
+};
+
+constexpr bool operator==(const Ellipse& left, const Ellipse& right) {
+  return left.center == right.center && left.radius_x == right.radius_x &&
+         left.radius_y == right.radius_y;
+}
+
+constexpr bool operator!=(const Ellipse& left, const Ellipse& right) {
+  return !(left == right);
+}
+
+using TextRange = Range;
+}  // namespace cru::platform