[wxWidgets.git] / src / stc / scintilla / src / LineMarker.cxx

// Scintilla source code edit control
/** @file LineMarker.cxx
 ** Defines the look of a line marker in the margin .
 **/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#include "Platform.h"

#include "Scintilla.h"
#include "LineMarker.h"

static void DrawBox(Surface *surface, int centreX, int centreY, int armSize, Colour fore, Colour back) {
	PRectangle rc;
	rc.left = centreX - armSize;
	rc.top = centreY - armSize;
	rc.right = centreX + armSize + 1;
	rc.bottom = centreY + armSize + 1;
	surface->RectangleDraw(rc, back, fore);
}

static void DrawCircle(Surface *surface, int centreX, int centreY, int armSize, Colour fore, Colour back) {
	PRectangle rcCircle;
	rcCircle.left = centreX - armSize;
	rcCircle.top = centreY - armSize;
	rcCircle.right = centreX + armSize + 1;
	rcCircle.bottom = centreY + armSize + 1;
	surface->Ellipse(rcCircle, back, fore);
}

static void DrawPlus(Surface *surface, int centreX, int centreY, int armSize, Colour fore) {
	PRectangle rcV(centreX, centreY - armSize + 2, centreX + 1, centreY + armSize - 2 + 1);
	surface->FillRectangle(rcV, fore);
	PRectangle rcH(centreX - armSize + 2, centreY, centreX + armSize - 2 + 1, centreY+1);
	surface->FillRectangle(rcH, fore);
}

static void DrawMinus(Surface *surface, int centreX, int centreY, int armSize, Colour fore) {
	PRectangle rcH(centreX - armSize + 2, centreY, centreX + armSize - 2 + 1, centreY+1);
	surface->FillRectangle(rcH, fore);
}

void LineMarker::Draw(Surface *surface, PRectangle &rcWhole, Font &fontForCharacter) {
	// Restrict most shapes a bit
	PRectangle rc = rcWhole;
	rc.top++;
	rc.bottom--;
	int minDim = Platform::Minimum(rc.Width(), rc.Height());
	minDim--;	// Ensure does not go beyond edge
	int centreX = (rc.right + rc.left) / 2;
	int centreY = (rc.bottom + rc.top) / 2;
	int dimOn2 = minDim / 2;
	int dimOn4 = minDim / 4;
	int blobSize = dimOn2-1;
	int armSize = dimOn2-2;
	if (rc.Width() > (rc.Height() * 2)) {
		// Wide column is line number so move to left to try to avoid overlapping number
		centreX = rc.left + dimOn2 + 1;
	}
	if (markType == SC_MARK_ROUNDRECT) {
		PRectangle rcRounded = rc;
		rcRounded.left = rc.left + 1;
		rcRounded.right = rc.right - 1;
		surface->RoundedRectangle(rcRounded, fore.allocated, back.allocated);
	} else if (markType == SC_MARK_CIRCLE) {
		PRectangle rcCircle;
		rcCircle.left = centreX - dimOn2;
		rcCircle.top = centreY - dimOn2;
		rcCircle.right = centreX + dimOn2;
		rcCircle.bottom = centreY + dimOn2;
		surface->Ellipse(rcCircle, fore.allocated, back.allocated);
	} else if (markType == SC_MARK_ARROW) {
		Point pts[] = {
    		Point(centreX - dimOn4, centreY - dimOn2),
    		Point(centreX - dimOn4, centreY + dimOn2),
    		Point(centreX + dimOn2 - dimOn4, centreY),
		};
		surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                 		fore.allocated, back.allocated);

	} else if (markType == SC_MARK_ARROWDOWN) {
		Point pts[] = {
    		Point(centreX - dimOn2, centreY - dimOn4),
    		Point(centreX + dimOn2, centreY - dimOn4),
    		Point(centreX, centreY + dimOn2 - dimOn4),
		};
		surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                 		fore.allocated, back.allocated);

	} else if (markType == SC_MARK_PLUS) {
		Point pts[] = {
    		Point(centreX - armSize, centreY - 1),
    		Point(centreX - 1, centreY - 1),
    		Point(centreX - 1, centreY - armSize),
    		Point(centreX + 1, centreY - armSize),
    		Point(centreX + 1, centreY - 1),
    		Point(centreX + armSize, centreY -1),
    		Point(centreX + armSize, centreY +1),
    		Point(centreX + 1, centreY + 1),
    		Point(centreX + 1, centreY + armSize),
    		Point(centreX - 1, centreY + armSize),
    		Point(centreX - 1, centreY + 1),
    		Point(centreX - armSize, centreY + 1),
		};
		surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                 		fore.allocated, back.allocated);

	} else if (markType == SC_MARK_MINUS) {
		Point pts[] = {
    		Point(centreX - armSize, centreY - 1),
    		Point(centreX + armSize, centreY -1),
    		Point(centreX + armSize, centreY +1),
    		Point(centreX - armSize, centreY + 1),
		};
		surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                 		fore.allocated, back.allocated);

	} else if (markType == SC_MARK_SMALLRECT) {
		PRectangle rcSmall;
		rcSmall.left = rc.left + 1;
		rcSmall.top = rc.top + 2;
		rcSmall.right = rc.right - 1;
		rcSmall.bottom = rc.bottom - 2;
		surface->RectangleDraw(rcSmall, fore.allocated, back.allocated);
		
	} else if (markType == SC_MARK_EMPTY) {
		// An invisible marker so don't draw anything
		
	} else if (markType == SC_MARK_VLINE) {
		surface->PenColour(back.allocated);
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, rcWhole.bottom);
		
	} else if (markType == SC_MARK_LCORNER) {
		surface->PenColour(back.allocated);
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, rc.top + dimOn2);
		surface->LineTo(rc.right - 2, rc.top + dimOn2);
		
	} else if (markType == SC_MARK_TCORNER) {
		surface->PenColour(back.allocated);
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, rcWhole.bottom);
		surface->MoveTo(centreX, rc.top + dimOn2);
		surface->LineTo(rc.right - 2, rc.top + dimOn2);
		
	} else if (markType == SC_MARK_LCORNERCURVE) {
		surface->PenColour(back.allocated);
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, rc.top + dimOn2-3);
		surface->LineTo(centreX+3, rc.top + dimOn2);
		surface->LineTo(rc.right - 1, rc.top + dimOn2);
		
	} else if (markType == SC_MARK_TCORNERCURVE) {
		surface->PenColour(back.allocated);
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, rcWhole.bottom);
		
		surface->MoveTo(centreX, rc.top + dimOn2-3);
		surface->LineTo(centreX+3, rc.top + dimOn2);
		surface->LineTo(rc.right - 1, rc.top + dimOn2);
		
	} else if (markType == SC_MARK_BOXPLUS) {
		surface->PenColour(back.allocated);
		DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
		
	} else if (markType == SC_MARK_BOXPLUSCONNECTED) {
		surface->PenColour(back.allocated);
		DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
		
		surface->MoveTo(centreX, centreY + blobSize);
		surface->LineTo(centreX, rcWhole.bottom);
		
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, centreY - blobSize);
		
	} else if (markType == SC_MARK_BOXMINUS) {
		surface->PenColour(back.allocated);
		DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
		
		surface->MoveTo(centreX, centreY + blobSize);
		surface->LineTo(centreX, rcWhole.bottom);
		
	} else if (markType == SC_MARK_BOXMINUSCONNECTED) {
		surface->PenColour(back.allocated);
		DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
		
		surface->MoveTo(centreX, centreY + blobSize);
		surface->LineTo(centreX, rcWhole.bottom);
		
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, centreY - blobSize);
		
	} else if (markType == SC_MARK_CIRCLEPLUS) {
		DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		surface->PenColour(back.allocated);
		DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
		
	} else if (markType == SC_MARK_CIRCLEPLUSCONNECTED) {
		DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		surface->PenColour(back.allocated);
		DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
		
		surface->MoveTo(centreX, centreY + blobSize);
		surface->LineTo(centreX, rcWhole.bottom);
		
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, centreY - blobSize);
		
	} else if (markType == SC_MARK_CIRCLEMINUS) {
		DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		surface->PenColour(back.allocated);
		DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
		
		surface->MoveTo(centreX, centreY + blobSize);
		surface->LineTo(centreX, rcWhole.bottom);
		
	} else if (markType == SC_MARK_CIRCLEMINUSCONNECTED) {
		DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
		surface->PenColour(back.allocated);
		DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
		
		surface->MoveTo(centreX, centreY + blobSize);
		surface->LineTo(centreX, rcWhole.bottom);
		
		surface->MoveTo(centreX, rcWhole.top);
		surface->LineTo(centreX, centreY - blobSize);
		
	} else if (markType >= SC_MARK_CHARACTER) {
		char character[1];
		character[0] = static_cast<char>(markType - SC_MARK_CHARACTER);
		int width = surface->WidthText(fontForCharacter, character, 1);
		rc.left += (rc.Width() - width) / 2;
		rc.right = rc.left + width;
		surface->DrawTextClipped(rc, fontForCharacter, rc.bottom - 2, 
			character, 1, fore.allocated, back.allocated);

	} else { // SC_MARK_SHORTARROW
		Point pts[] = {
			Point(centreX, centreY + dimOn2),
			Point(centreX + dimOn2, centreY),
			Point(centreX, centreY - dimOn2),
			Point(centreX, centreY - dimOn4),
			Point(centreX - dimOn4, centreY - dimOn4),
			Point(centreX - dimOn4, centreY + dimOn4),
			Point(centreX, centreY + dimOn4),
			Point(centreX, centreY + dimOn2),
		};
		surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
				fore.allocated, back.allocated);
	}
}
Commit	Line	Data
9ce192d4	1	// Scintilla source code edit control
65ec6247 RD	2	/** @file LineMarker.cxx
	3	** Defines the look of a line marker in the margin .
	4	**/
	5	// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
9ce192d4 RD	6	// The License.txt file describes the conditions under which this software may be distributed.
	7
	8	#include "Platform.h"
	9
	10	#include "Scintilla.h"
	11	#include "LineMarker.h"
	12
65ec6247 RD	13	static void DrawBox(Surface *surface, int centreX, int centreY, int armSize, Colour fore, Colour back) {
	14	PRectangle rc;
	15	rc.left = centreX - armSize;
	16	rc.top = centreY - armSize;
	17	rc.right = centreX + armSize + 1;
	18	rc.bottom = centreY + armSize + 1;
	19	surface->RectangleDraw(rc, back, fore);
	20	}
	21
	22	static void DrawCircle(Surface *surface, int centreX, int centreY, int armSize, Colour fore, Colour back) {
	23	PRectangle rcCircle;
	24	rcCircle.left = centreX - armSize;
	25	rcCircle.top = centreY - armSize;
	26	rcCircle.right = centreX + armSize + 1;
	27	rcCircle.bottom = centreY + armSize + 1;
	28	surface->Ellipse(rcCircle, back, fore);
	29	}
	30
	31	static void DrawPlus(Surface *surface, int centreX, int centreY, int armSize, Colour fore) {
	32	PRectangle rcV(centreX, centreY - armSize + 2, centreX + 1, centreY + armSize - 2 + 1);
	33	surface->FillRectangle(rcV, fore);
	34	PRectangle rcH(centreX - armSize + 2, centreY, centreX + armSize - 2 + 1, centreY+1);
	35	surface->FillRectangle(rcH, fore);
	36	}
	37
	38	static void DrawMinus(Surface *surface, int centreX, int centreY, int armSize, Colour fore) {
	39	PRectangle rcH(centreX - armSize + 2, centreY, centreX + armSize - 2 + 1, centreY+1);
	40	surface->FillRectangle(rcH, fore);
	41	}
	42
b8b0e402	43	void LineMarker::Draw(Surface *surface, PRectangle &rcWhole, Font &fontForCharacter) {
65ec6247 RD	44	// Restrict most shapes a bit
	45	PRectangle rc = rcWhole;
	46	rc.top++;
	47	rc.bottom--;
9ce192d4 RD	48	int minDim = Platform::Minimum(rc.Width(), rc.Height());
	49	minDim--; // Ensure does not go beyond edge
	50	int centreX = (rc.right + rc.left) / 2;
	51	int centreY = (rc.bottom + rc.top) / 2;
	52	int dimOn2 = minDim / 2;
	53	int dimOn4 = minDim / 4;
65ec6247 RD	54	int blobSize = dimOn2-1;
65ec6247 RD	55	int armSize = dimOn2-2;
9ce192d4 RD	56	if (rc.Width() > (rc.Height() * 2)) {
	57	// Wide column is line number so move to left to try to avoid overlapping number
	58	centreX = rc.left + dimOn2 + 1;
	59	}
	60	if (markType == SC_MARK_ROUNDRECT) {
	61	PRectangle rcRounded = rc;
	62	rcRounded.left = rc.left + 1;
	63	rcRounded.right = rc.right - 1;
	64	surface->RoundedRectangle(rcRounded, fore.allocated, back.allocated);
	65	} else if (markType == SC_MARK_CIRCLE) {
	66	PRectangle rcCircle;
	67	rcCircle.left = centreX - dimOn2;
	68	rcCircle.top = centreY - dimOn2;
	69	rcCircle.right = centreX + dimOn2;
	70	rcCircle.bottom = centreY + dimOn2;
	71	surface->Ellipse(rcCircle, fore.allocated, back.allocated);
	72	} else if (markType == SC_MARK_ARROW) {
	73	Point pts[] = {
	74	Point(centreX - dimOn4, centreY - dimOn2),
	75	Point(centreX - dimOn4, centreY + dimOn2),
	76	Point(centreX + dimOn2 - dimOn4, centreY),
	77	};
	78	surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
	79	fore.allocated, back.allocated);
	80
	81	} else if (markType == SC_MARK_ARROWDOWN) {
	82	Point pts[] = {
	83	Point(centreX - dimOn2, centreY - dimOn4),
	84	Point(centreX + dimOn2, centreY - dimOn4),
	85	Point(centreX, centreY + dimOn2 - dimOn4),
	86	};
	87	surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
	88	fore.allocated, back.allocated);
	89
	90	} else if (markType == SC_MARK_PLUS) {
9ce192d4 RD	91	Point pts[] = {
	92	Point(centreX - armSize, centreY - 1),
	93	Point(centreX - 1, centreY - 1),
	94	Point(centreX - 1, centreY - armSize),
	95	Point(centreX + 1, centreY - armSize),
	96	Point(centreX + 1, centreY - 1),
	97	Point(centreX + armSize, centreY -1),
	98	Point(centreX + armSize, centreY +1),
	99	Point(centreX + 1, centreY + 1),
	100	Point(centreX + 1, centreY + armSize),
	101	Point(centreX - 1, centreY + armSize),
	102	Point(centreX - 1, centreY + 1),
	103	Point(centreX - armSize, centreY + 1),
	104	};
	105	surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
	106	fore.allocated, back.allocated);
	107
	108	} else if (markType == SC_MARK_MINUS) {
9ce192d4 RD	109	Point pts[] = {
	110	Point(centreX - armSize, centreY - 1),
	111	Point(centreX + armSize, centreY -1),
	112	Point(centreX + armSize, centreY +1),
	113	Point(centreX - armSize, centreY + 1),
	114	};
9ce192d4 RD	115	surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
	116	fore.allocated, back.allocated);
	117
	118	} else if (markType == SC_MARK_SMALLRECT) {
	119	PRectangle rcSmall;
	120	rcSmall.left = rc.left + 1;
	121	rcSmall.top = rc.top + 2;
	122	rcSmall.right = rc.right - 1;
	123	rcSmall.bottom = rc.bottom - 2;
	124	surface->RectangleDraw(rcSmall, fore.allocated, back.allocated);
65ec6247	125
9ce192d4 RD	126	} else if (markType == SC_MARK_EMPTY) {
9ce192d4 RD	127	// An invisible marker so don't draw anything
65ec6247 RD	128
	129	} else if (markType == SC_MARK_VLINE) {
	130	surface->PenColour(back.allocated);
	131	surface->MoveTo(centreX, rcWhole.top);
	132	surface->LineTo(centreX, rcWhole.bottom);
	133
	134	} else if (markType == SC_MARK_LCORNER) {
	135	surface->PenColour(back.allocated);
	136	surface->MoveTo(centreX, rcWhole.top);
	137	surface->LineTo(centreX, rc.top + dimOn2);
	138	surface->LineTo(rc.right - 2, rc.top + dimOn2);
	139
	140	} else if (markType == SC_MARK_TCORNER) {
	141	surface->PenColour(back.allocated);
	142	surface->MoveTo(centreX, rcWhole.top);
	143	surface->LineTo(centreX, rcWhole.bottom);
	144	surface->MoveTo(centreX, rc.top + dimOn2);
	145	surface->LineTo(rc.right - 2, rc.top + dimOn2);
	146
	147	} else if (markType == SC_MARK_LCORNERCURVE) {
	148	surface->PenColour(back.allocated);
	149	surface->MoveTo(centreX, rcWhole.top);
	150	surface->LineTo(centreX, rc.top + dimOn2-3);
	151	surface->LineTo(centreX+3, rc.top + dimOn2);
	152	surface->LineTo(rc.right - 1, rc.top + dimOn2);
	153
	154	} else if (markType == SC_MARK_TCORNERCURVE) {
	155	surface->PenColour(back.allocated);
	156	surface->MoveTo(centreX, rcWhole.top);
	157	surface->LineTo(centreX, rcWhole.bottom);
	158
	159	surface->MoveTo(centreX, rc.top + dimOn2-3);
	160	surface->LineTo(centreX+3, rc.top + dimOn2);
	161	surface->LineTo(rc.right - 1, rc.top + dimOn2);
	162
	163	} else if (markType == SC_MARK_BOXPLUS) {
	164	surface->PenColour(back.allocated);
	165	DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
	166	DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
	167
	168	} else if (markType == SC_MARK_BOXPLUSCONNECTED) {
	169	surface->PenColour(back.allocated);
	170	DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
	171	DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
	172
	173	surface->MoveTo(centreX, centreY + blobSize);
	174	surface->LineTo(centreX, rcWhole.bottom);
	175
	176	surface->MoveTo(centreX, rcWhole.top);
	177	surface->LineTo(centreX, centreY - blobSize);
	178
	179	} else if (markType == SC_MARK_BOXMINUS) {
	180	surface->PenColour(back.allocated);
	181	DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
	182	DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
	183
	184	surface->MoveTo(centreX, centreY + blobSize);
	185	surface->LineTo(centreX, rcWhole.bottom);
	186
	187	} else if (markType == SC_MARK_BOXMINUSCONNECTED) {
	188	surface->PenColour(back.allocated);
	189	DrawBox(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
	190	DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
	191
192	surface->MoveTo(centreX, centreY + blobSize);
193	surface->LineTo(centreX, rcWhole.bottom);
194
195	surface->MoveTo(centreX, rcWhole.top);
196	surface->LineTo(centreX, centreY - blobSize);
197
198	} else if (markType == SC_MARK_CIRCLEPLUS) {
199	DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
200	surface->PenColour(back.allocated);
201	DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
202
203	} else if (markType == SC_MARK_CIRCLEPLUSCONNECTED) {
204	DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
205	surface->PenColour(back.allocated);
206	DrawPlus(surface, centreX, centreY, blobSize, back.allocated);
207
208	surface->MoveTo(centreX, centreY + blobSize);
209	surface->LineTo(centreX, rcWhole.bottom);
210
211	surface->MoveTo(centreX, rcWhole.top);
212	surface->LineTo(centreX, centreY - blobSize);
213
214	} else if (markType == SC_MARK_CIRCLEMINUS) {
215	DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
216	surface->PenColour(back.allocated);
217	DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
218
219	surface->MoveTo(centreX, centreY + blobSize);
220	surface->LineTo(centreX, rcWhole.bottom);
221
222	} else if (markType == SC_MARK_CIRCLEMINUSCONNECTED) {
223	DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, back.allocated);
224	surface->PenColour(back.allocated);
225	DrawMinus(surface, centreX, centreY, blobSize, back.allocated);
226
227	surface->MoveTo(centreX, centreY + blobSize);
228	surface->LineTo(centreX, rcWhole.bottom);
229
230	surface->MoveTo(centreX, rcWhole.top);
231	surface->LineTo(centreX, centreY - blobSize);
232
b8b0e402 RD	233	} else if (markType >= SC_MARK_CHARACTER) {
	234	char character[1];
	235	character[0] = static_cast<char>(markType - SC_MARK_CHARACTER);
	236	int width = surface->WidthText(fontForCharacter, character, 1);
	237	rc.left += (rc.Width() - width) / 2;
	238	rc.right = rc.left + width;
	239	surface->DrawTextClipped(rc, fontForCharacter, rc.bottom - 2,
	240	character, 1, fore.allocated, back.allocated);
	241
9ce192d4 RD	242	} else { // SC_MARK_SHORTARROW
	243	Point pts[] = {
	244	Point(centreX, centreY + dimOn2),
	245	Point(centreX + dimOn2, centreY),
	246	Point(centreX, centreY - dimOn2),
	247	Point(centreX, centreY - dimOn4),
	248	Point(centreX - dimOn4, centreY - dimOn4),
	249	Point(centreX - dimOn4, centreY + dimOn4),
	250	Point(centreX, centreY + dimOn4),
	251	Point(centreX, centreY + dimOn2),
	252	};
	253	surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
	254	fore.allocated, back.allocated);
	255	}
	256	}