Aegisub/p-designer/ass_drawing.h

// Copyright (c) 2006, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
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//     may be used to endorse or promote products derived from this software
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#pragma once

#ifndef _ASS_DRAWING_H
#define _ASS_DRAWING_H

#include <vector>
#include <pair>
#include <wx/string.h>

enum AssDrawingSegmentType {
	SEGMENT_MOVE,           // m <x> <y>
	SEGMENT_MOVE_NOCLOSE,   // n <x> <y>
	SEGMENT_LINE,           // l <x> <y>
	SEGMENT_BEZIER,         // b <x1> <y1> <x2> <y2> <x3> <y3>
	SEGMENT_BSPLINE,        // s <x1> <y2> <x2> <y2> <x3> <y3> [... <xN> <yN>]
	SEGMENT_BSPLINE_EXTEND, // p <x> <y>
	SEGMENT_BSPLINE_CLOSE,  // c
	                        // thought: maybe join the three last into one? (gabest doesn't)
};

struct AssDrawingPoint {
	int x, y;
	AssDrawingPoint(int _x, int _y) { x = _x; y = _y; }
};

struct AssDrawingSegment {
	AssDrawingSegmentType type;
	std::vector<AssDrawingPoint> points;
};

struct AssDrawing {
	int scale;
	std::vector<AssDrawingSegment> data;

	wxString ToString(); // stupid conversion to string, doesn't try to shorten things out
	int FromString(wxString src); // returns 0 on success, index+1 of offending character on fail

	void Collapse(); // try to join as many segments together as possible, without affecting the actual shape (eg. join "l 1 2 l 3 4" into "l 1 2 3 4")
	void Expand(); // split into as many segments as possible, without creating any meaningless ones, such as null-moves (ie. expand "l 1 2 3 4" into "l 1 2 l 3 4")

	void Rescale(int new_scale); // change the scale value, stretching the drawing to match the new one
	void Stretch(float factor); // up/down scale the drawing by a factor

	AssDrawingPoint GetMinXY(); // get the lowest x and y coordinates present
	AssDrawingPoint GetMaxXY(); // get the highest x and y coordinates present
	AssDrawingPoint GetExtents(); // get the extents of the drawing as seen by VSFilter
	AssDrawingPoint GetCenterXY(); // get the "center" of the drawing (as seen by VSFilter)
};

#endif