| 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 1.5 2009/01/19 16:53:42 lgarnier 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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