1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4OpenGLBitMapStore.cc,v 1.4 2007/11/15 10:14:23 allison Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | // |
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31 | // John Allison 6th January 2007 |
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32 | |
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33 | #ifdef G4VIS_BUILD_OPENGL_DRIVER |
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34 | |
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35 | #include "G4OpenGLBitMapStore.hh" |
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36 | |
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37 | namespace G4OpenGLBitMapStore { |
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38 | |
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39 | std::map<Key, GLubyte*> fStore; |
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40 | |
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41 | void SetBit(G4int i, G4int j, GLubyte* bitmap, G4int byteColumns) |
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42 | { |
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43 | G4int k = i / 8 + byteColumns * j; |
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44 | bitmap[k] |= 0x80 >> i % 8; |
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45 | } |
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46 | |
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47 | const GLubyte* GetBitMap(Shape shape, G4double& size, G4bool filled) |
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48 | { |
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49 | // Rationalise size |
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50 | G4int bitSize = G4int(std::abs(size) + 0.49); |
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51 | if (bitSize < 1) bitSize = 1; |
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52 | |
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53 | // Modify size in calling function (passed by reference). |
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54 | size = bitSize; |
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55 | |
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56 | Key key(shape, bitSize, filled); |
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57 | |
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58 | // If previously encountered, return. |
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59 | if (fStore.find(key) != fStore.end()) return fStore[key]; |
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60 | |
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61 | // Create and store new bitmap. |
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62 | G4int byteColumns = (G4int(bitSize - 1) / 8) + 1; |
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63 | G4int byteRows = bitSize; |
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64 | G4int nBytes = byteColumns*byteRows; |
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65 | GLubyte* bitmap = new GLubyte[nBytes]; |
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66 | fStore[key] = bitmap; |
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67 | |
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68 | if (shape == square && filled) { // Set all bits and return. |
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69 | for (G4int i = 0; i < nBytes; ++i) bitmap[i] = 0xff; |
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70 | return bitmap; |
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71 | } else { // Clear ready for setting bits. |
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72 | for (G4int i = 0; i < nBytes; ++i) bitmap[i] = 0x00; |
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73 | } |
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74 | |
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75 | // Fill bitmap. |
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76 | GLint linewidth; |
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77 | glGetIntegerv(GL_LINE_WIDTH, &linewidth); |
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78 | if (linewidth > bitSize) linewidth = bitSize; |
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79 | G4double outer = bitSize / 2.; |
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80 | G4double outer2 = outer * outer; |
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81 | G4double inner = bitSize / 2. - linewidth; |
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82 | G4double inner2 = inner * inner; |
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83 | for (G4int i = 0; i < bitSize; ++i) { |
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84 | for (G4int j = 0; j < bitSize; ++j) { |
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85 | G4double x = i - (bitSize - 1) * 0.5; |
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86 | G4double y = j - (bitSize - 1) * 0.5; |
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87 | G4double r2 = x * x + y * y; |
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88 | if (shape == circle) { |
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89 | if (filled) { |
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90 | if (r2 < outer2) SetBit(i, j, bitmap, byteColumns); |
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91 | } else { |
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92 | if (r2 < outer2 && r2 > inner2) SetBit(i, j, bitmap, byteColumns); |
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93 | } |
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94 | } else { // Unfilled square. |
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95 | if (x < -inner || x > inner || y < -inner || y > inner) |
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96 | SetBit(i, j, bitmap, byteColumns); |
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97 | } |
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98 | } |
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99 | } |
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100 | |
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101 | return bitmap; |
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102 | } |
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103 | |
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104 | } // End namespace G4OpenGLBitMapStore. |
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105 | |
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106 | #endif |
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