Mercurial > hg > forks > gldragon
annotate dmutil.cpp @ 42:3c7e1d3fa5a2
Implement OpengL extension handling through new header file dmglexts.h to
"define" the entrypoints we require and some wonderful preprocessor macro
magic to add checks for them via SDL_GL_ExtensionSupported() and initialize
function pointers with SDL_GL_GetProcAddress().
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Thu, 05 Dec 2019 21:05:43 +0200 |
parents | 03b86b9c2f29 |
children | 9909014498f0 |
rev | line source |
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1 // |
22
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2 // GLDragon - OpenGL PLY model viewer / simple benchmark |
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3 // -- Miscellaneous utility functions |
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4 // Programmed and designed by Matti 'ccr' Hämäläinen <ccr@tnsp.org> |
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5 // (C) Copyright 2019 Tecnic Software productions (TNSP) |
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6 // |
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7 // See file "COPYING" for license information. |
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8 // |
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9 #include "dmutil.h" |
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10 #include <fstream> |
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11 |
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12 |
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13 std::string dmStrLTrim(const std::string& str, const std::string& delim) |
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14 { |
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15 return str.substr(str.find_first_not_of(delim)); |
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16 } |
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17 |
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18 |
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19 std::string dmStrRTrim(const std::string& str, const std::string& delim) |
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20 { |
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21 return str.substr(0, str.find_last_not_of(delim)); |
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22 } |
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23 |
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24 |
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25 std::string dmStrTrim(const std::string& str, const std::string& delim) |
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26 { |
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27 if (str.empty()) |
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28 return str; |
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29 |
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30 size_t start = str.find_first_not_of(delim); |
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31 return str.substr(start, str.find_last_not_of(delim) - start + 1); |
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32 } |
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33 |
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34 |
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35 std::vector<std::string> dmStrSplit(const std::string& str, const std::string& delim) |
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36 { |
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37 std::vector<std::string> result; |
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38 size_t oldpos = 0, newpos; |
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39 |
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40 do |
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41 { |
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42 newpos = str.find_first_of(delim, oldpos); |
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43 std::string tmp = dmStrTrim(str.substr(oldpos, newpos - oldpos)); |
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44 |
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45 if (!tmp.empty()) |
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46 result.push_back(tmp); |
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47 |
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48 oldpos = newpos + 1; |
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49 } while (newpos != std::string::npos); |
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50 |
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51 return result; |
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52 } |
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53 |
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54 |
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55 std::string dmStrJoin(const std::vector<std::string> &list, const std::string &delim) |
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56 { |
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57 switch (list.size()) |
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58 { |
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59 case 0: |
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60 return ""; |
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61 |
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62 case 1: |
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63 return list[0]; |
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64 |
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65 default: |
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66 std::string result; |
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67 bool first = true; |
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68 for (const auto &elem : list) |
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69 { |
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70 if (!first) |
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71 result += delim; |
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72 else |
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73 first = false; |
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74 result += elem; |
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75 } |
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76 return result; |
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77 } |
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78 } |
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79 |
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80 |
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81 std::string dmGetPath(const std::string &path) |
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82 { |
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83 size_t dirsep = path.find_last_of("/\\"); |
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84 return (dirsep != std::string::npos) ? path.substr(0, dirsep + 1) : ""; |
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85 } |
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86 |
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87 |
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88 bool dmReadText(const std::string &filename, std::string &buf, const int maxSize) |
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89 { |
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90 std::ifstream in(filename.c_str(), std::fstream::in); |
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91 |
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92 if (!in.is_open()) |
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93 { |
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94 printf("ERROR: Unable to open file '%s'.\n", |
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95 filename.c_str()); |
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96 return false; |
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97 } |
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98 |
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99 in.seekg(0, std::ios::end); |
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100 |
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101 if (in.tellg() > maxSize) |
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102 { |
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103 printf("ERROR: File '%s' is too large.\n", |
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104 filename.c_str()); |
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105 return false; |
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106 } |
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107 |
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108 buf.reserve(in.tellg()); |
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109 in.seekg(0, std::ios::beg); |
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110 |
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111 buf.assign((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>()); |
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112 |
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113 return true; |
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114 } |
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115 |
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116 |
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117 bool dmFileExists(const std::string &filename, std::ios_base::openmode mode) |
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118 { |
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119 std::ifstream infile(filename.c_str(), mode); |
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120 return infile.good(); |
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parents:
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changeset
|
121 } |