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Location: cpp/openttd-patchpack/source/src/newgrf_spritegroup.cpp
r6343:4d2d12eee7b9
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(svn r9371) -Feature: Add support for variable snow lines in the arctic climate, supplied
by newgrf files. When this is enabled forests cannot be built below the highest
snow line, and farms can't be built above it. Houses still use the
_opt.snow_line so they are all consistent, so to make them respect the snowline
you may want to use some newhouses features as well.
by newgrf files. When this is enabled forests cannot be built below the highest
snow line, and farms can't be built above it. Houses still use the
_opt.snow_line so they are all consistent, so to make them respect the snowline
you may want to use some newhouses features as well.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 | /* $Id$ */
#include "stdafx.h"
#include "openttd.h"
#include "variables.h"
#include "macros.h"
#include "landscape.h"
#include "oldpool.h"
#include "newgrf_callbacks.h"
#include "newgrf_spritegroup.h"
#include "date.h"
#include "sprite.h"
static void SpriteGroupPoolCleanBlock(uint start_item, uint end_item);
static uint _spritegroup_count = 0;
STATIC_OLD_POOL(SpriteGroup, SpriteGroup, 9, 250, NULL, SpriteGroupPoolCleanBlock)
static void DestroySpriteGroup(SpriteGroup *group)
{
/* Free dynamically allocated memory */
/* XXX Cast away the consts due to MSVC being buggy... */
switch (group->type) {
case SGT_REAL:
free((SpriteGroup**)group->g.real.loaded);
free((SpriteGroup**)group->g.real.loading);
break;
case SGT_DETERMINISTIC:
free(group->g.determ.adjusts);
free(group->g.determ.ranges);
break;
case SGT_RANDOMIZED:
free((SpriteGroup**)group->g.random.groups);
break;
case SGT_TILELAYOUT:
free((void*)group->g.layout.dts->seq);
free(group->g.layout.dts);
break;
default:
break;
}
}
static void SpriteGroupPoolCleanBlock(uint start_item, uint end_item)
{
uint i;
for (i = start_item; i <= end_item; i++) {
DestroySpriteGroup(GetSpriteGroup(i));
}
}
/* Allocate a new SpriteGroup */
SpriteGroup *AllocateSpriteGroup()
{
/* This is totally different to the other pool allocators, as we never remove an item from the pool. */
if (_spritegroup_count == GetSpriteGroupPoolSize()) {
if (!AddBlockToPool(&_SpriteGroup_pool)) return NULL;
}
return GetSpriteGroup(_spritegroup_count++);
}
void InitializeSpriteGroupPool()
{
CleanPool(&_SpriteGroup_pool);
_spritegroup_count = 0;
}
static inline uint32 GetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
/* Return common variables */
switch (variable) {
case 0x00: return max(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0);
case 0x01: return clamp(_cur_year, ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR) - ORIGINAL_BASE_YEAR;
case 0x02: return _cur_month;
case 0x03: return _opt.landscape;
case 0x09: return _date_fract;
case 0x0A: return _tick_counter;
case 0x0C: return object->callback;
case 0x10: return object->callback_param1;
case 0x11: return 0;
case 0x18: return object->callback_param2;
case 0x1A: return UINT_MAX;
case 0x1B: return GB(_display_opt, 0, 6);
case 0x1C: return object->last_value;
case 0x20: return _opt.landscape == LT_HILLY ? GetSnowLine() : 0xFF;
/* Not a common variable, so evalute the feature specific variables */
default: return object->GetVariable(object, variable, parameter, available);
}
}
/* Evaluate an adjustment for a variable of the given size.
* U is the unsigned type and S is the signed type to use. */
template <typename U, typename S>
static U EvalAdjustT(const DeterministicSpriteGroupAdjust *adjust, U last_value, uint32 value)
{
value >>= adjust->shift_num;
value &= adjust->and_mask;
if (adjust->type != DSGA_TYPE_NONE) value += (S)adjust->add_val;
switch (adjust->type) {
case DSGA_TYPE_DIV: value /= (S)adjust->divmod_val; break;
case DSGA_TYPE_MOD: value %= (U)adjust->divmod_val; break;
case DSGA_TYPE_NONE: break;
}
switch (adjust->operation) {
case DSGA_OP_ADD: return last_value + value;
case DSGA_OP_SUB: return last_value - value;
case DSGA_OP_SMIN: return min((S)last_value, (S)value);
case DSGA_OP_SMAX: return max((S)last_value, (S)value);
case DSGA_OP_UMIN: return min((U)last_value, (U)value);
case DSGA_OP_UMAX: return max((U)last_value, (U)value);
case DSGA_OP_SDIV: return (S)last_value / (S)value;
case DSGA_OP_SMOD: return (S)last_value % (S)value;
case DSGA_OP_UDIV: return (U)last_value / (U)value;
case DSGA_OP_UMOD: return (U)last_value % (U)value;
case DSGA_OP_MUL: return last_value * value;
case DSGA_OP_AND: return last_value & value;
case DSGA_OP_OR: return last_value | value;
case DSGA_OP_XOR: return last_value ^ value;
default: return value;
}
}
static inline const SpriteGroup *ResolveVariable(const SpriteGroup *group, ResolverObject *object)
{
static SpriteGroup nvarzero;
uint32 last_value = 0;
uint32 value = 0;
uint i;
object->scope = group->g.determ.var_scope;
for (i = 0; i < group->g.determ.num_adjusts; i++) {
DeterministicSpriteGroupAdjust *adjust = &group->g.determ.adjusts[i];
/* Try to get the variable. We shall assume it is available, unless told otherwise. */
bool available = true;
if (adjust->variable == 0x7E) {
ResolverObject subobject = *object;
const SpriteGroup *subgroup = Resolve(adjust->subroutine, &subobject);
if (subgroup == NULL || subgroup->type != SGT_CALLBACK) {
value = CALLBACK_FAILED;
} else {
value = subgroup->g.callback.result;
}
} else {
value = GetVariable(object, adjust->variable, adjust->parameter, &available);
}
if (!available) {
/* Unsupported property: skip further processing and return either
* the group from the first range or the default group. */
return Resolve(group->g.determ.num_ranges > 0 ? group->g.determ.ranges[0].group : group->g.determ.default_group, object);
}
switch (group->g.determ.size) {
case DSG_SIZE_BYTE: value = EvalAdjustT<uint8, int8>(adjust, last_value, value); break;
case DSG_SIZE_WORD: value = EvalAdjustT<uint16, int16>(adjust, last_value, value); break;
case DSG_SIZE_DWORD: value = EvalAdjustT<uint32, int32>(adjust, last_value, value); break;
default: NOT_REACHED(); break;
}
last_value = value;
}
object->last_value = last_value;
if (group->g.determ.num_ranges == 0) {
/* nvar == 0 is a special case -- we turn our value into a callback result */
nvarzero.type = SGT_CALLBACK;
nvarzero.g.callback.result = GB(value, 0, 15);
return &nvarzero;
}
for (i = 0; i < group->g.determ.num_ranges; i++) {
if (group->g.determ.ranges[i].low <= value && value <= group->g.determ.ranges[i].high) {
return Resolve(group->g.determ.ranges[i].group, object);
}
}
return Resolve(group->g.determ.default_group, object);
}
static inline const SpriteGroup *ResolveRandom(const SpriteGroup *group, ResolverObject *object)
{
uint32 mask;
byte index;
object->scope = group->g.random.var_scope;
if (object->trigger != 0) {
/* Handle triggers */
/* Magic code that may or may not do the right things... */
byte waiting_triggers = object->GetTriggers(object);
byte match = group->g.random.triggers & (waiting_triggers | object->trigger);
bool res;
res = (group->g.random.cmp_mode == RSG_CMP_ANY) ?
(match != 0) : (match == group->g.random.triggers);
if (res) {
waiting_triggers &= ~match;
object->reseed |= (group->g.random.num_groups - 1) << group->g.random.lowest_randbit;
} else {
waiting_triggers |= object->trigger;
}
object->SetTriggers(object, waiting_triggers);
}
mask = (group->g.random.num_groups - 1) << group->g.random.lowest_randbit;
index = (object->GetRandomBits(object) & mask) >> group->g.random.lowest_randbit;
return Resolve(group->g.random.groups[index], object);
}
/* ResolverObject (re)entry point */
const SpriteGroup *Resolve(const SpriteGroup *group, ResolverObject *object)
{
/* We're called even if there is no group, so quietly return nothing */
if (group == NULL) return NULL;
switch (group->type) {
case SGT_REAL: return object->ResolveReal(object, group);
case SGT_DETERMINISTIC: return ResolveVariable(group, object);
case SGT_RANDOMIZED: return ResolveRandom(group, object);
default: return group;
}
}
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