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annotate src/newgrf_cargo.cpp @ 7199:0814b1155c40 draft

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(svn r10477) -Codechange: add some callbacks to customise the acceptance of industries.
author rubidium <rubidium@openttd.org>
date Sun, 08 Jul 2007 17:40:04 +0000
parents 05dc53b3e64a
children 0ab2820a1e52
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1 /* $Id$ */
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2
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3 #include "stdafx.h"
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4 #include "openttd.h"
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5 #include "debug.h"
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6 #include "cargotype.h"
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7 #include "newgrf.h"
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8 #include "newgrf_callbacks.h"
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9 #include "newgrf_spritegroup.h"
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10 #include "newgrf_cargo.h"
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13 static uint32 CargoGetRandomBits(const ResolverObject *object)
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14 {
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15 return 0;
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16 }
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19 static uint32 CargoGetTriggers(const ResolverObject *object)
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20 {
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21 return 0;
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22 }
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25 static void CargoSetTriggers(const ResolverObject *object, int triggers)
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26 {
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27 return;
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28 }
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31 static uint32 CargoGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
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32 {
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33 DEBUG(grf, 1, "Unhandled cargo property 0x%X", variable);
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34
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35 *available = false;
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36 return 0;
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37 }
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38
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39
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40 static const SpriteGroup *CargoResolveReal(const ResolverObject *object, const SpriteGroup *group)
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41 {
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42 /* Cargo action 2s should always have only 1 "loaded" state, but some
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43 * times things don't follow the spec... */
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44 if (group->g.real.num_loaded > 0) return group->g.real.loaded[0];
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45 if (group->g.real.num_loading > 0) return group->g.real.loading[0];
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46
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47 return NULL;
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48 }
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49
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51 static void NewCargoResolver(ResolverObject *res, const CargoSpec *cs)
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52 {
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53 res->GetRandomBits = &CargoGetRandomBits;
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54 res->GetTriggers = &CargoGetTriggers;
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55 res->SetTriggers = &CargoSetTriggers;
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56 res->GetVariable = &CargoGetVariable;
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57 res->ResolveReal = &CargoResolveReal;
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58
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59 res->u.cargo.cs = cs;
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60
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61 res->callback = 0;
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62 res->callback_param1 = 0;
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63 res->callback_param2 = 0;
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64 res->last_value = 0;
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65 res->trigger = 0;
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66 res->reseed = 0;
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67 }
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68
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69
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70 SpriteID GetCustomCargoSprite(const CargoSpec *cs)
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71 {
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72 const SpriteGroup *group;
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73 ResolverObject object;
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74
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75 NewCargoResolver(&object, cs);
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76
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77 group = Resolve(cs->group, &object);
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78 if (group == NULL || group->type != SGT_RESULT) return 0;
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79
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80 return group->g.result.sprite;
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81 }
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82
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83
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84 uint16 GetCargoCallback(uint16 callback, uint32 param1, uint32 param2, const CargoSpec *cs)
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85 {
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86 ResolverObject object;
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87 const SpriteGroup *group;
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88
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89 NewCargoResolver(&object, cs);
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90 object.callback = callback;
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91 object.callback_param1 = param1;
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92 object.callback_param2 = param2;
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93
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94 group = Resolve(cs->group, &object);
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95 if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
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96
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97 return group->g.callback.result;
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98 }
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99
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101 CargoID GetCargoTranslation(uint8 cargo, const GRFFile *grffile)
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102 {
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103 /* Pre-version 7 uses the 'climate dependent' ID, i.e. cargo is the cargo ID */
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104 if (grffile->grf_version < 7) return HASBIT(_cargo_mask, cargo) ? cargo : (CargoID) CT_INVALID;
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105
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106 /* If the GRF contains a translation table (and the cargo is in bounds)
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107 * then get the cargo ID for the label */
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108 if (cargo < grffile->cargo_max) return GetCargoIDByLabel(grffile->cargo_list[cargo]);
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109
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110 /* Else the cargo value is a 'climate independent' 'bitnum' */
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111 return GetCargoIDByBitnum(cargo);
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112 }
7199
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113
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114 uint8 GetReverseCargoTranslation(CargoID cargo, const GRFFile *grffile)
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115 {
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116 /* Pre-version 7 uses the 'climate dependent' ID, i.e. cargo is the cargo ID */
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117 if (grffile->grf_version < 7) return cargo;
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118
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119 const CargoSpec *cs = GetCargo(cargo);
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120
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121 /* If the GRF contains a translation table (and the cargo is in the table)
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122 * then get the cargo ID for the label */
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123 for (uint i = 0; i < grffile->cargo_max; i++) {
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124 if (cs->label == grffile->cargo_list[i]) return i;
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125 }
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126
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127 /* No matching label was found, so we return the 'climate independent' 'bitnum' */
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128 return cs->bitnum;;
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129 }