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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : /** Osnola:
21 : IMPORTANT NOTE: some Quickdraw lines/frames can not be "quickly" drawn exactly:
22 : for instance, when PenSize=(1,1), the line from (0,0) to (8,0)
23 : corresponds to the rectangle (0,0)(0,1)(9,1)(9,0), which can only be drawn
24 : by drawing a rectangle. Drawing a non horizontal/vertical will imply to draw
25 : a polygon, ...
26 : Similarly, drawing the frame of a rectangle (0,0)(0,1)(9,1)(9,0) when PenSize=(1,1),
27 : will imply to draw a rectangle (0.5,0.5)(0.5,8.5)(8.5,8.5)(8.5,0.5) with linewidth=1...
28 :
29 : Here, we choose:
30 : - for horizontal/vertical lines and line with length less than five to draw the real line,
31 : - in the other case, we keep the same shape (even if this means some "bad" coordinates)
32 : */
33 :
34 : #include <basegfx/polygon/b2dpolygon.hxx>
35 : #include <basegfx/polygon/b2dpolygontools.hxx>
36 : #include "shape.hxx"
37 :
38 : namespace PictReaderShapePrivate {
39 : /** returns an inside rectangle knowing the penSize in order to obtain the ``correct'' position
40 : when we draw a frame in wide length*/
41 0 : Rectangle contractRectangle(bool drawFrame, Rectangle const &rect, Size const &pSize) {
42 0 : if (!drawFrame) return rect;
43 0 : long penSize=(pSize.Width()+pSize.Height())/2;
44 0 : if (2*penSize > rect.Right()-rect.Left()) penSize = (rect.Right()-rect.Left()+1)/2;
45 0 : if (2*penSize > rect.Bottom()-rect.Top()) penSize = (rect.Bottom()-rect.Top()+1)/2;
46 0 : long const X[2] = { rect.Left()+penSize/2, rect.Right()-(penSize+1)/2 };
47 0 : long const Y[2] = { rect.Top()+penSize/2, rect.Bottom()-(penSize+1)/2 };
48 0 : return Rectangle(Point(X[0],Y[0]), Point(X[1], Y[1]));
49 : }
50 : }
51 :
52 : namespace PictReaderShape {
53 : //--------- draws a horizontal/vertical/small line (by creating a "rectangle/polygon") ---------
54 53 : bool drawLineHQ(VirtualDevice *dev, Point const &orig, Point const &dest, Size const &pSize) {
55 53 : long dir[2] = { dest.X()-orig.X(), dest.Y()-orig.Y() };
56 53 : bool vertic = dir[0] == 0;
57 53 : bool horiz = dir[1] == 0;
58 53 : if (!horiz && !vertic && dir[0]*dir[0]+dir[1]*dir[1] > 25) return false;
59 :
60 33 : long X[2]={ orig.X(), dest.X() }, Y[2] = { orig.Y(), dest.Y() };
61 : using namespace basegfx;
62 33 : B2DPolygon poly;
63 33 : if (horiz || vertic) {
64 33 : if (horiz) {
65 23 : if (X[0] < X[1]) X[1]+=pSize.Width();
66 12 : else X[0]+=pSize.Width();
67 23 : Y[1] += pSize.Height();
68 : }
69 : else {
70 10 : if (Y[0] < Y[1]) Y[1]+=pSize.Height();
71 5 : else Y[0]+=pSize.Height();
72 10 : X[1] += pSize.Width();
73 : }
74 33 : poly.append(B2DPoint(X[0], Y[0])); poly.append(B2DPoint(X[1], Y[0]));
75 33 : poly.append(B2DPoint(X[1], Y[1])); poly.append(B2DPoint(X[0], Y[1]));
76 33 : poly.append(B2DPoint(X[0], Y[0]));
77 : }
78 : else {
79 0 : long origPt[4][2] = { { orig.X(), orig.Y() }, { orig.X()+pSize.Width(), orig.Y() },
80 0 : { orig.X()+pSize.Width(), orig.Y()+pSize.Height() },
81 0 : { orig.X(), orig.Y()+pSize.Height() }};
82 0 : long origAvoid = dir[0] > 0 ? (dir[1] > 0 ? 2 : 1) : (dir[1] > 0 ? 3 : 0);
83 0 : long destPt[4][2] = { { dest.X(), dest.Y() }, { dest.X()+pSize.Width(), dest.Y() },
84 0 : { dest.X()+pSize.Width(), dest.Y()+pSize.Height() },
85 0 : { dest.X(), dest.Y()+pSize.Height() }};
86 0 : for (int w = origAvoid+1; w < origAvoid+4; w++) {
87 0 : int wh = (w%4);
88 0 : poly.append(B2DPoint(origPt[wh][0], origPt[wh][1]));
89 : }
90 0 : for (int w = origAvoid+3; w < origAvoid+6; w++) {
91 0 : int wh = (w%4);
92 0 : poly.append(B2DPoint(destPt[wh][0], destPt[wh][1]));
93 : }
94 0 : int wh = (origAvoid+1)%4;
95 0 : poly.append(B2DPoint(origPt[wh][0], origPt[wh][1]));
96 : }
97 :
98 : // HACK: here we use the line coloring when drawing the shape
99 : // must be changed if other parameter are changed to draw
100 : // a line/fill shape
101 33 : Color oldFColor = dev->GetFillColor(), oldLColor = dev->GetLineColor();
102 33 : dev->SetFillColor(oldLColor); dev->SetLineColor(Color(COL_TRANSPARENT));
103 33 : dev->DrawPolygon(poly);
104 33 : dev->SetLineColor(oldLColor); dev->SetFillColor(oldFColor);
105 33 : return true;
106 : }
107 :
108 : //
109 : //-------------------- draws a line --------------------
110 : //
111 53 : void drawLine(VirtualDevice *dev, Point const &orig, Point const &dest, Size const &pSize) {
112 106 : if (drawLineHQ(dev,orig,dest,pSize)) return;
113 :
114 20 : long penSize=(pSize.Width()+pSize.Height())/2;
115 20 : long decal[2] = { pSize.Width()/2, pSize.Height()/2};
116 :
117 : using namespace basegfx;
118 20 : B2DPolygon poly;
119 20 : poly.append(B2DPoint(double(orig.X()+decal[0]), double(orig.Y()+decal[1])));
120 20 : poly.append(B2DPoint(double(dest.X()+decal[0]), double(dest.Y()+decal[1])));
121 20 : dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLINEJOIN_NONE);
122 : }
123 :
124 : //-------------------- draws a rectangle --------------------
125 : /* Note(checkme): contradically with the QuickDraw's reference 3-23, it seems better to consider
126 : that the frame/content of a rectangle appears inside the given rectangle. Does a conversion
127 : appear between the pascal functions and the data stored in the file ? */
128 0 : void drawRectangle(VirtualDevice *dev, bool drawFrame, Rectangle const &orig, Size const &pSize) {
129 0 : int penSize=(pSize.Width()+pSize.Height())/2;
130 0 : Rectangle rect = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize);
131 0 : long const X[2] = { rect.Left(), rect.Right() };
132 0 : long const Y[2] = { rect.Top(), rect.Bottom() };
133 :
134 : using namespace basegfx;
135 0 : B2DPolygon poly;
136 0 : poly.append(B2DPoint(X[0], Y[0])); poly.append(B2DPoint(X[1], Y[0]));
137 0 : poly.append(B2DPoint(X[1], Y[1])); poly.append(B2DPoint(X[0], Y[1]));
138 0 : poly.append(B2DPoint(X[0], Y[0]));
139 :
140 0 : if (drawFrame)
141 0 : dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLINEJOIN_NONE);
142 : else
143 0 : dev->DrawPolygon(poly);
144 0 : }
145 :
146 : //-------------------- draws an ellipse --------------------
147 0 : void drawEllipse(VirtualDevice *dev, bool drawFrame, Rectangle const &orig, Size const &pSize) {
148 0 : int penSize=(pSize.Width()+pSize.Height())/2;
149 0 : Rectangle oval = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize);
150 : using namespace basegfx;
151 0 : long const X[2] = { oval.Left(), oval.Right() };
152 0 : long const Y[2] = { oval.Top(), oval.Bottom() };
153 0 : B2DPoint center(0.5*(X[1]+X[0]), 0.5*(Y[1]+Y[0]));
154 0 : B2DPolygon poly = tools::createPolygonFromEllipse(center, 0.5*(X[1]-X[0]), 0.5*(Y[1]-Y[0]));
155 0 : if (drawFrame)
156 0 : dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLINEJOIN_NONE);
157 : else
158 0 : dev->DrawPolygon(poly);
159 0 : }
160 :
161 : //-------------------- draws an arc/pie --------------------
162 0 : void drawArc(VirtualDevice *dev, bool drawFrame, Rectangle const &orig, const double& angle1, const double& angle2, Size const &pSize) {
163 0 : int penSize=(pSize.Width()+pSize.Height())/2;
164 0 : Rectangle arc = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize);
165 : using namespace basegfx;
166 :
167 0 : double const PI2 = M_PI/2.0;
168 : // pict angle are CW with 0 at twelve oclock ( with Y-axis inverted)...
169 0 : double angl1 = angle1-PI2;
170 0 : double angl2 = angle2-PI2;
171 0 : long const X[2] = { arc.Left(), arc.Right() };
172 0 : long const Y[2] = { arc.Top(), arc.Bottom() };
173 0 : B2DPoint center(0.5*(X[1]+X[0]), 0.5*(Y[1]+Y[0]));
174 :
175 : // We must have angl1 between 0 and F_2PI
176 0 : while (angl1 < 0.0) { angl1 += F_2PI; angl2 += F_2PI; }
177 0 : while (angl1 >= F_2PI) { angl1 -= F_2PI; angl2 -= F_2PI; }
178 :
179 : // if this happen, we want a complete circle
180 : // so we set angl2 slightly less than angl1
181 0 : if (angl2 >= angl1+F_2PI) angl2 = angl1-0.001;
182 :
183 : // We must have angl2 between 0 and F_2PI
184 0 : while (angl2 < 0.0) angl2 += F_2PI;
185 0 : while (angl2 >= F_2PI) angl2 -= F_2PI;
186 :
187 0 : B2DPolygon poly = tools::createPolygonFromEllipseSegment(center, 0.5*(X[1]-X[0]), 0.5*(Y[1]-Y[0]), angl1, angl2);
188 0 : if (drawFrame)
189 0 : dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLINEJOIN_NONE);
190 : else {
191 : // adds circle's center
192 0 : poly.append(center);
193 0 : dev->DrawPolygon(poly);
194 0 : }
195 0 : }
196 : //-------------------- draws a rectangle with round corner --------------------
197 0 : void drawRoundRectangle(VirtualDevice *dev, bool drawFrame, Rectangle const &orig, Size const &ovalSize, Size const &pSize) {
198 0 : int penSize=(pSize.Width()+pSize.Height())/2;
199 0 : Rectangle oval = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize);
200 0 : int ovalW=ovalSize.Width(), ovalH=ovalSize.Height();
201 : using namespace basegfx;
202 0 : long const X[2] = { oval.Left(), oval.Right() };
203 0 : long const Y[2] = { oval.Top(), oval.Bottom() };
204 0 : long width = X[1] - X[0];
205 0 : long height = Y[1] - Y[0];
206 0 : if (ovalW > width) ovalW = static_cast< int >( width );
207 0 : if (ovalH > height) ovalH = static_cast< int >( height );
208 :
209 0 : B2DRectangle rect(B2DPoint(X[0],Y[0]), B2DPoint(X[1],Y[1]));
210 0 : B2DPolygon poly = tools::createPolygonFromRect(rect, (width != 0.0) ? ovalW/width : 0.0, (height != 0.0) ? ovalH/height : 0.0);
211 :
212 0 : if (drawFrame)
213 0 : dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLINEJOIN_NONE);
214 : else
215 0 : dev->DrawPolygon(poly);
216 0 : }
217 :
218 : //-------------------- draws a polygon --------------------
219 29 : void drawPolygon(VirtualDevice *dev, bool drawFrame, Polygon const &orig, Size const &pSize) {
220 29 : int penSize=(pSize.Width()+pSize.Height())/2;
221 29 : long decalTL[2] = {0, 0}, decalBR[2] = { pSize.Width(), pSize.Height()};
222 29 : if (drawFrame) {
223 0 : decalTL[0] += penSize/2; decalTL[1] += penSize/2;
224 0 : decalBR[0] -= (penSize+1)/2; decalBR[1] -= (penSize+1)/2;
225 : }
226 : // Quickdraw Drawing Reference 3-82: the pen size is only used for frame
227 29 : else decalBR[0] = decalBR[1] = 0;
228 :
229 :
230 29 : int numPt = orig.GetSize();
231 58 : if (numPt <= 1) return;
232 :
233 : // we compute a barycenter of the point to define the extended direction of each point
234 29 : double bary[2] = { 0.0, 0.0 };
235 1330 : for (int i = 0; i < numPt; i++) {
236 1301 : Point const &pt = orig.GetPoint(i);
237 1301 : bary[0] += double(pt.X()); bary[1] += double(pt.Y());
238 : }
239 29 : bary[0]/=double(numPt); bary[1]/=double(numPt);
240 :
241 : using namespace basegfx;
242 29 : B2DPolygon poly;
243 : // Note: a polygon can be open, so we must not close it when we draw the frame
244 1330 : for (int i = 0; i < numPt; i++) {
245 1301 : Point const &pt = orig.GetPoint(i);
246 1301 : double x = (double(pt.X()) < bary[0]) ? pt.X()+decalTL[0] : pt.X()+decalBR[0];
247 1301 : double y = (double(pt.Y()) < bary[1]) ? pt.Y()+decalTL[1] : pt.Y()+decalBR[1];
248 1301 : poly.append(B2DPoint(x, y));
249 : }
250 29 : if (drawFrame)
251 0 : dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLINEJOIN_NONE);
252 : else
253 29 : dev->DrawPolygon(poly);
254 : }
255 :
256 :
257 : }
258 :
259 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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