// 4 september 2015

typedef struct uiArea uiArea;
typedef struct uiAreaHandler uiAreaHandler;
typedef struct uiAreaDrawParams uiAreaDrawParams;

typedef struct uiDrawContext uiDrawContext;

struct uiAreaHandler {
	void (*Draw)(uiAreaHandler *, uiArea *, uiAreaDrawParams *);
	uintmax_t (*HScrollMax)(uiAreaHandler *, uiArea *);
	uintmax_t (*VScrollMax)(uiAreaHandler *, uiArea *);
};

struct uiAreaDrawParams {
	uiDrawContext *Context;

	intmax_t ClientWidth;
	intmax_t ClientHeight;

	intmax_t ClipX;
	intmax_t ClipY;
	intmax_t ClipWidth;
	intmax_t ClipHeight;

	int DPIX;
	int DPIY;

	intmax_t HScrollPos;
	intmax_t VScrollPos;
};

// TODO default miter limit?
// cairo - 10.0
// GDI - ?
// Core Graphics - ?

// TODO dotting/dashing

typedef struct uiDrawStrokeParams uiDrawStrokeParams;
typedef enum uiDrawLineCap uiDrawLineCap;
typedef enum uiDrawLineJoin uiDrawLineJoin;

typedef uint32_t uiRGB;

enum uiDrawLineCap {
	uiDrawLineCapFlat,
	uiDrawLineCapRound,
	uiDrawLineCapSquare,
};

enum uiDrawLineJoin {
	uiDrawLineJoinMiter,
	uiDrawLineJoinRound,
	uiDrawLineJoinBevel,
};

struct uiDrawStrokeParams {
	uiRGB RGB;
	uiDrawLineCap Cap;
	uiDrawLineJoin Join;
	intmax_t Thickness;
	intmax_t MiterLimit;
};

void uiDrawMoveTo(uiDrawContext *, intmax_t, intmax_t);
void uiDrawLineTo(uiDrawContext *, intmax_t, intmax_t);
void uiDrawStroke(uiDrawContext *, uiDrawStrokeParams *);