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#pragma once
#include "Resource.h"
#include <memory>
namespace cru::platform::graphics {
struct CRU_PLATFORM_GRAPHICS_API IGeometry : virtual IGraphicsResource {
/**
* \remarks Because I designed CreateStrokeGeometry first, which might be not
* that rational. So the default implementation calls that method and do the
* test. New implementation should override this.
*/
virtual bool StrokeContains(float width, const Point& point);
virtual bool FillContains(const Point& point) = 0;
virtual Rect GetBounds() = 0;
virtual std::unique_ptr<IGeometry> Transform(const Matrix& matrix) = 0;
virtual std::unique_ptr<IGeometry> CreateStrokeGeometry(float width) = 0;
};
/**
* \remarks We always run into platform porting problems. When I designed this
* interface, I thought every platform would support GetCurrentPosition.
* However, this is not actually true.
* For web canvas, it turns out that it can't get current position. So I have to
* not implement or use it, which disables every relative actions because they
* depend on it. But luckily, the web canvas path can be constructed from svg
* path (see https://developer.mozilla.org/en-US/docs/Web/API/Path2D/Path2D). So
* I come up with a new idea that first create a geometry describe itself in
* svg, and then construct path from it. And all relative methods should become
* virtual so it can override them.
*/
struct CRU_PLATFORM_GRAPHICS_API IGeometryBuilder : virtual IGraphicsResource {
virtual Point GetCurrentPosition() = 0;
virtual void MoveTo(const Point& point) = 0;
virtual void RelativeMoveTo(const Point& offset);
virtual void LineTo(const Point& point) = 0;
void LineTo(float x, float y) { LineTo(Point(x, y)); }
virtual void RelativeLineTo(const Point& offset);
void RelativeLineTo(float x, float y) { RelativeLineTo(Point(x, y)); }
virtual void CubicBezierTo(const Point& start_control_point,
const Point& end_control_point,
const Point& end_point) = 0;
virtual void RelativeCubicBezierTo(const Point& start_control_offset,
const Point& end_control_offset,
const Point& end_offset);
virtual void QuadraticBezierTo(const Point& control_point,
const Point& end_point) = 0;
virtual void RelativeQuadraticBezierTo(const Point& control_offset,
const Point& end_offset);
virtual void ArcTo(const Point& radius, float angle, bool is_large_arc,
bool is_clockwise, const Point& end_point);
virtual void RelativeArcTo(const Point& radius, float angle, bool is_large_arc,
bool is_clockwise, const Point& end_offset);
virtual void CloseFigure(bool close) = 0;
virtual std::unique_ptr<IGeometry> Build() = 0;
void ParseAndApplySvgPathData(StringView path_d);
};
std::unique_ptr<IGeometry> CRU_PLATFORM_GRAPHICS_API
CreateGeometryFromSvgPathData(IGraphicsFactory* factory, StringView path_d);
} // namespace cru::platform::graphics
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