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#pragma once
#include "../Brush.h"
#include "../Painter.h"
#include "WebCanvasBrush.h"
#include "WebCanvasRef.h"
#include "WebCanvasResource.h"
#include <emscripten/val.h>
#include <optional>
namespace cru::platform::graphics::web_canvas {
/**
* Notes about Transform:
* Although there is a Matrix object now supported by browsers, it is not
* generally available in old browsers. However, now that we are using
* WebAssembly, the browsers should be quite up to date, but there is still a
* window between the two things. And it is common for a platform to not support
* getting transform and only allow you to do transformation.
*/
class WebCanvasPainter : public WebCanvasResource, public virtual IPainter {
public:
WebCanvasPainter(WebCanvasGraphicsFactory* factory, emscripten::val context,
std::optional<Matrix> init_transform = std::nullopt);
~WebCanvasPainter() override;
public:
Matrix GetTransform() override;
void SetTransform(const Matrix& transform) override;
void ConcatTransform(const Matrix& matrix) override;
void Clear(const Color& color) override;
void DrawLine(const Point& start, const Point& end, IBrush* brush,
float width) override;
void StrokeRectangle(const Rect& rectangle, IBrush* brush,
float width) override;
void FillRectangle(const Rect& rectangle, IBrush* brush) override;
void StrokeEllipse(const Rect& outline_rect, IBrush* brush,
float width) override;
void FillEllipse(const Rect& outline_rect, IBrush* brush) override;
emscripten::val GetCanvas2DContext() const { return context_; }
WebCanvasRef GetCanvas();
void SetStrokeStyle(IBrush* brush, float width = 0.0f);
void SetFillStyle(IBrush* brush);
private:
WebCanvasBrush* ConvertBrush(IBrush* brush) const;
private:
Matrix current_transform_;
emscripten::val context_;
};
} // namespace cru::platform::graphics::web_canvas
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