/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 . */ /** Osnola: IMPORTANT NOTE: some Quickdraw lines/frames can not be "quickly" drawn exactly: for instance, when PenSize=(1,1), the line from (0,0) to (8,0) corresponds to the rectangle (0,0)(0,1)(9,1)(9,0), which can only be drawn by drawing a rectangle. Drawing a non horizontal/vertical will imply to draw a polygon, ... Similarly, drawing the frame of a rectangle (0,0)(0,1)(9,1)(9,0) when PenSize=(1,1), 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... Here, we choose: - for horizontal/vertical lines and line with length less than five to draw the real line, - in the other case, we keep the same shape (even if this means some "bad" coordinates) */ #include #include #include "shape.hxx" namespace PictReaderShapePrivate { /** returns an inside rectangle knowing the penSize in order to obtain the ``correct'' position when we draw a frame in wide length*/ tools::Rectangle contractRectangle(bool drawFrame, tools::Rectangle const &rect, Size const &pSize) { if (!drawFrame) return rect; long penSize=(pSize.Width()+pSize.Height())/2; if (2*penSize > rect.Right()-rect.Left()) penSize = (rect.Right()-rect.Left()+1)/2; if (2*penSize > rect.Bottom()-rect.Top()) penSize = (rect.Bottom()-rect.Top()+1)/2; long const X[2] = { rect.Left()+penSize/2, rect.Right()-(penSize+1)/2 }; long const Y[2] = { rect.Top()+penSize/2, rect.Bottom()-(penSize+1)/2 }; return tools::Rectangle(Point(X[0],Y[0]), Point(X[1], Y[1])); } } namespace PictReaderShape { //--------- draws a horizontal/vertical/small line (by creating a "rectangle/polygon") --------- bool drawLineHQ(VirtualDevice *dev, Point const &orig, Point const &dest, Size const &pSize) { long dir[2] = { dest.X()-orig.X(), dest.Y()-orig.Y() }; bool vertic = dir[0] == 0; bool horiz = dir[1] == 0; if (!horiz && !vertic && dir[0]*dir[0]+dir[1]*dir[1] > 25) return false; using namespace basegfx; B2DPolygon poly; if (horiz || vertic) { long X[2]={ orig.X(), dest.X() }, Y[2] = { orig.Y(), dest.Y() }; if (horiz) { if (X[0] < X[1]) X[1]+=pSize.Width(); else X[0]+=pSize.Width(); Y[1] += pSize.Height(); } else { if (Y[0] < Y[1]) Y[1]+=pSize.Height(); else Y[0]+=pSize.Height(); X[1] += pSize.Width(); } poly.append(B2DPoint(X[0], Y[0])); poly.append(B2DPoint(X[1], Y[0])); poly.append(B2DPoint(X[1], Y[1])); poly.append(B2DPoint(X[0], Y[1])); poly.append(B2DPoint(X[0], Y[0])); } else { long origPt[4][2] = { { orig.X(), orig.Y() }, { orig.X()+pSize.Width(), orig.Y() }, { orig.X()+pSize.Width(), orig.Y()+pSize.Height() }, { orig.X(), orig.Y()+pSize.Height() }}; long origAvoid = dir[0] > 0 ? (dir[1] > 0 ? 2 : 1) : (dir[1] > 0 ? 3 : 0); long destPt[4][2] = { { dest.X(), dest.Y() }, { dest.X()+pSize.Width(), dest.Y() }, { dest.X()+pSize.Width(), dest.Y()+pSize.Height() }, { dest.X(), dest.Y()+pSize.Height() }}; for (int w = origAvoid+1; w < origAvoid+4; w++) { int wh = (w%4); poly.append(B2DPoint(origPt[wh][0], origPt[wh][1])); } for (int w = origAvoid+3; w < origAvoid+6; w++) { int wh = (w%4); poly.append(B2DPoint(destPt[wh][0], destPt[wh][1])); } int wh = (origAvoid+1)%4; poly.append(B2DPoint(origPt[wh][0], origPt[wh][1])); } // HACK: here we use the line coloring when drawing the shape // must be changed if other parameter are changed to draw // a line/fill shape Color oldFColor = dev->GetFillColor(), oldLColor = dev->GetLineColor(); dev->SetFillColor(oldLColor); dev->SetLineColor(Color(COL_TRANSPARENT)); dev->DrawPolygon(poly); dev->SetLineColor(oldLColor); dev->SetFillColor(oldFColor); return true; } //-------------------- draws a line -------------------- void drawLine(VirtualDevice *dev, Point const &orig, Point const &dest, Size const &pSize) { if (drawLineHQ(dev,orig,dest,pSize)) return; long penSize=(pSize.Width()+pSize.Height())/2; long decal[2] = { pSize.Width()/2, pSize.Height()/2}; using namespace basegfx; B2DPolygon poly; poly.append(B2DPoint(double(orig.X()+decal[0]), double(orig.Y()+decal[1]))); poly.append(B2DPoint(double(dest.X()+decal[0]), double(dest.Y()+decal[1]))); dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLineJoin::NONE); } //-------------------- draws a rectangle -------------------- /* Note(checkme): contradictally with the QuickDraw's reference 3-23, it seems better to consider that the frame/content of a rectangle appears inside the given rectangle. Does a conversion appear between the pascal functions and the data stored in the file ? */ void drawRectangle(VirtualDevice *dev, bool drawFrame, tools::Rectangle const &orig, Size const &pSize) { int penSize=(pSize.Width()+pSize.Height())/2; tools::Rectangle rect = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize); long const X[2] = { rect.Left(), rect.Right() }; long const Y[2] = { rect.Top(), rect.Bottom() }; using namespace basegfx; B2DPolygon poly; poly.append(B2DPoint(X[0], Y[0])); poly.append(B2DPoint(X[1], Y[0])); poly.append(B2DPoint(X[1], Y[1])); poly.append(B2DPoint(X[0], Y[1])); poly.append(B2DPoint(X[0], Y[0])); if (drawFrame) dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLineJoin::NONE); else dev->DrawPolygon(poly); } //-------------------- draws an ellipse -------------------- void drawEllipse(VirtualDevice *dev, bool drawFrame, tools::Rectangle const &orig, Size const &pSize) { int penSize=(pSize.Width()+pSize.Height())/2; tools::Rectangle oval = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize); using namespace basegfx; long const X[2] = { oval.Left(), oval.Right() }; long const Y[2] = { oval.Top(), oval.Bottom() }; B2DPoint center(0.5*(X[1]+X[0]), 0.5*(Y[1]+Y[0])); B2DPolygon poly = basegfx::utils::createPolygonFromEllipse(center, 0.5*(X[1]-X[0]), 0.5*(Y[1]-Y[0])); if (drawFrame) dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLineJoin::NONE); else dev->DrawPolygon(poly); } //-------------------- draws an arc/pie -------------------- void drawArc(VirtualDevice *dev, bool drawFrame, tools::Rectangle const &orig, const double& angle1, const double& angle2, Size const &pSize) { int penSize=(pSize.Width()+pSize.Height())/2; tools::Rectangle arc = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize); using namespace basegfx; double const PI2 = M_PI/2.0; // pict angle are CW with 0 at twelve o'clock (with Y-axis inverted)... double angl1 = angle1-PI2; double angl2 = angle2-PI2; long const X[2] = { arc.Left(), arc.Right() }; long const Y[2] = { arc.Top(), arc.Bottom() }; B2DPoint center(0.5*(X[1]+X[0]), 0.5*(Y[1]+Y[0])); // We must have angl1 between 0 and F_2PI while (angl1 < 0.0) { angl1 += F_2PI; angl2 += F_2PI; } while (angl1 >= F_2PI) { angl1 -= F_2PI; angl2 -= F_2PI; } // if this happen, we want a complete circle // so we set angl2 slightly less than angl1 if (angl2 >= angl1+F_2PI) angl2 = angl1-0.001; // We must have angl2 between 0 and F_2PI while (angl2 < 0.0) angl2 += F_2PI; while (angl2 >= F_2PI) angl2 -= F_2PI; B2DPolygon poly = basegfx::utils::createPolygonFromEllipseSegment(center, 0.5*(X[1]-X[0]), 0.5*(Y[1]-Y[0]), angl1, angl2); if (drawFrame) dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLineJoin::NONE); else { // adds circle's center poly.append(center); dev->DrawPolygon(poly); } } //-------------------- draws a rectangle with round corner -------------------- void drawRoundRectangle(VirtualDevice *dev, bool drawFrame, tools::Rectangle const &orig, Size const &ovalSize, Size const &pSize) { int penSize=(pSize.Width()+pSize.Height())/2; tools::Rectangle oval = PictReaderShapePrivate::contractRectangle(drawFrame, orig, pSize); int ovalW=ovalSize.Width(), ovalH=ovalSize.Height(); using namespace basegfx; long const X[2] = { oval.Left(), oval.Right() }; long const Y[2] = { oval.Top(), oval.Bottom() }; long width = X[1] - X[0]; long height = Y[1] - Y[0]; if (ovalW > width) ovalW = static_cast< int >( width ); if (ovalH > height) ovalH = static_cast< int >( height ); B2DRectangle rect(B2DPoint(X[0],Y[0]), B2DPoint(X[1],Y[1])); B2DPolygon poly = basegfx::utils::createPolygonFromRect(rect, (width != 0.0) ? ovalW/width : 0.0, (height != 0.0) ? ovalH/height : 0.0); if (drawFrame) dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLineJoin::NONE); else dev->DrawPolygon(poly); } //-------------------- draws a polygon -------------------- void drawPolygon(VirtualDevice *dev, bool drawFrame, tools::Polygon const &orig, Size const &pSize) { int penSize=(pSize.Width()+pSize.Height())/2; long decalTL[2] = {0, 0}, decalBR[2] = { pSize.Width(), pSize.Height()}; if (drawFrame) { decalTL[0] += penSize/2; decalTL[1] += penSize/2; decalBR[0] -= (penSize+1)/2; decalBR[1] -= (penSize+1)/2; } // Quickdraw Drawing Reference 3-82: the pen size is only used for frame else decalBR[0] = decalBR[1] = 0; int numPt = orig.GetSize(); if (numPt <= 1) return; // we compute a barycenter of the point to define the extended direction of each point double bary[2] = { 0.0, 0.0 }; for (int i = 0; i < numPt; i++) { Point const &pt = orig.GetPoint(i); bary[0] += double(pt.X()); bary[1] += double(pt.Y()); } bary[0]/=double(numPt); bary[1]/=double(numPt); using namespace basegfx; B2DPolygon poly; poly.reserve(numPt); // Note: a polygon can be open, so we must not close it when we draw the frame for (int i = 0; i < numPt; i++) { Point const &pt = orig.GetPoint(i); double x = (double(pt.X()) < bary[0]) ? pt.X()+decalTL[0] : pt.X()+decalBR[0]; double y = (double(pt.Y()) < bary[1]) ? pt.Y()+decalTL[1] : pt.Y()+decalBR[1]; poly.append(B2DPoint(x, y)); } if (drawFrame) dev->DrawPolyLine(poly, double(penSize), basegfx::B2DLineJoin::NONE); else dev->DrawPolygon(poly); } } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */