summaryrefslogtreecommitdiff
path: root/src/newgrf_spritegroup.h
blob: 928964be75df52ee36fcdfdfeee8840fe27340d1 (plain)
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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file newgrf_spritegroup.h Action 2 handling. */

#ifndef NEWGRF_SPRITEGROUP_H
#define NEWGRF_SPRITEGROUP_H

#include "town_type.h"
#include "industry_type.h"
#include "core/bitmath_func.hpp"
#include "gfx_type.h"
#include "engine_type.h"
#include "tile_type.h"
#include "core/pool_type.hpp"
#include "house_type.h"

#include "newgrf_cargo.h"
#include "newgrf_callbacks.h"
#include "newgrf_generic.h"
#include "newgrf_storage.h"

/**
 * Gets the value of a so-called newgrf "register".
 * @param i index of the register
 * @pre i < 0x110
 * @return the value of the register
 */
static inline uint32 GetRegister(uint i)
{
	extern TemporaryStorageArray<uint32, 0x110> _temp_store;
	return _temp_store.Get(i);
}

/* List of different sprite group types */
enum SpriteGroupType {
	SGT_REAL,
	SGT_DETERMINISTIC,
	SGT_RANDOMIZED,
	SGT_CALLBACK,
	SGT_RESULT,
	SGT_TILELAYOUT,
	SGT_INDUSTRY_PRODUCTION,
};

struct SpriteGroup;
typedef uint32 SpriteGroupID;

/* SPRITE_WIDTH is 24. ECS has roughly 30 sprite groups per real sprite.
 * Adding an 'extra' margin would be assuming 64 sprite groups per real
 * sprite. 64 = 2^6, so 2^30 should be enough (for now) */
typedef Pool<SpriteGroup, SpriteGroupID, 1024, 1 << 30> SpriteGroupPool;
extern SpriteGroupPool _spritegroup_pool;

/* Common wrapper for all the different sprite group types */
struct SpriteGroup : SpriteGroupPool::PoolItem<&_spritegroup_pool> {
protected:
	SpriteGroup(SpriteGroupType type) : type(type) {}
	/** Base sprite group resolver */
	virtual const SpriteGroup *Resolve(struct ResolverObject *object) const { return this; };

public:
	virtual ~SpriteGroup() {}

	SpriteGroupType type;

	virtual SpriteID GetResult() const { return 0; }
	virtual byte GetNumResults() const { return 0; }
	virtual uint16 GetCallbackResult() const { return CALLBACK_FAILED; }

	/**
	 * ResolverObject (re)entry point.
	 * This cannot be made a call to a virtual function because virtual functions
	 * do not like NULL and checking for NULL *everywhere* is more cumbersome than
	 * this little helper function.
	 * @param group the group to resolve for
	 * @param object information needed to resolve the group
	 * @return the resolved group
	 */
	static const SpriteGroup *Resolve(const SpriteGroup *group, ResolverObject *object)
	{
		return group == NULL ? NULL : group->Resolve(object);
	}
};


/* 'Real' sprite groups contain a list of other result or callback sprite
 * groups. */
struct RealSpriteGroup : SpriteGroup {
	RealSpriteGroup() : SpriteGroup(SGT_REAL) {}
	~RealSpriteGroup();

	/* Loaded = in motion, loading = not moving
	 * Each group contains several spritesets, for various loading stages */

	/* XXX: For stations the meaning is different - loaded is for stations
	 * with small amount of cargo whilst loading is for stations with a lot
	 * of da stuff. */

	byte num_loaded;       ///< Number of loaded groups
	byte num_loading;      ///< Number of loading groups
	const SpriteGroup **loaded;  ///< List of loaded groups (can be SpriteIDs or Callback results)
	const SpriteGroup **loading; ///< List of loading groups (can be SpriteIDs or Callback results)

protected:
	const SpriteGroup *Resolve(ResolverObject *object) const;
};

/* Shared by deterministic and random groups. */
enum VarSpriteGroupScope {
	VSG_SCOPE_SELF,
	/* Engine of consists for vehicles, city for stations. */
	VSG_SCOPE_PARENT,
	/* Any vehicle in the consist (vehicles only) */
	VSG_SCOPE_RELATIVE,
};

enum DeterministicSpriteGroupSize {
	DSG_SIZE_BYTE,
	DSG_SIZE_WORD,
	DSG_SIZE_DWORD,
};

enum DeterministicSpriteGroupAdjustType {
	DSGA_TYPE_NONE,
	DSGA_TYPE_DIV,
	DSGA_TYPE_MOD,
};

enum DeterministicSpriteGroupAdjustOperation {
	DSGA_OP_ADD,  ///< a + b
	DSGA_OP_SUB,  ///< a - b
	DSGA_OP_SMIN, ///< (signed) min(a, b)
	DSGA_OP_SMAX, ///< (signed) max(a, b)
	DSGA_OP_UMIN, ///< (unsigned) min(a, b)
	DSGA_OP_UMAX, ///< (unsigned) max(a, b)
	DSGA_OP_SDIV, ///< (signed) a / b
	DSGA_OP_SMOD, ///< (signed) a % b
	DSGA_OP_UDIV, ///< (unsigned) a / b
	DSGA_OP_UMOD, ///< (unsigned) a & b
	DSGA_OP_MUL,  ///< a * b
	DSGA_OP_AND,  ///< a & b
	DSGA_OP_OR,   ///< a | b
	DSGA_OP_XOR,  ///< a ^ b
	DSGA_OP_STO,  ///< store a into temporary storage, indexed by b. return a
	DSGA_OP_RST,  ///< return b
	DSGA_OP_STOP, ///< store a into persistent storage, indexed by b, return a
	DSGA_OP_ROR,  ///< rotate a b positions to the right
	DSGA_OP_SCMP, ///< (signed) comparision (a < b -> 0, a == b = 1, a > b = 2)
	DSGA_OP_UCMP, ///< (unsigned) comparision (a < b -> 0, a == b = 1, a > b = 2)
};


struct DeterministicSpriteGroupAdjust {
	DeterministicSpriteGroupAdjustOperation operation;
	DeterministicSpriteGroupAdjustType type;
	byte variable;
	byte parameter; ///< Used for variables between 0x60 and 0x7F inclusive.
	byte shift_num;
	uint32 and_mask;
	uint32 add_val;
	uint32 divmod_val;
	const SpriteGroup *subroutine;
};


struct DeterministicSpriteGroupRange {
	const SpriteGroup *group;
	uint32 low;
	uint32 high;
};


struct DeterministicSpriteGroup : SpriteGroup {
	DeterministicSpriteGroup() : SpriteGroup(SGT_DETERMINISTIC) {}
	~DeterministicSpriteGroup();

	VarSpriteGroupScope var_scope;
	DeterministicSpriteGroupSize size;
	byte num_adjusts;
	byte num_ranges;
	DeterministicSpriteGroupAdjust *adjusts;
	DeterministicSpriteGroupRange *ranges; // Dynamically allocated

	/* Dynamically allocated, this is the sole owner */
	const SpriteGroup *default_group;

protected:
	const SpriteGroup *Resolve(ResolverObject *object) const;
};

enum RandomizedSpriteGroupCompareMode {
	RSG_CMP_ANY,
	RSG_CMP_ALL,
};

struct RandomizedSpriteGroup : SpriteGroup {
	RandomizedSpriteGroup() : SpriteGroup(SGT_RANDOMIZED) {}
	~RandomizedSpriteGroup();

	VarSpriteGroupScope var_scope;  ///< Take this object:

	RandomizedSpriteGroupCompareMode cmp_mode; ///< Check for these triggers:
	byte triggers;
	byte count;

	byte lowest_randbit; ///< Look for this in the per-object randomized bitmask:
	byte num_groups; ///< must be power of 2

	const SpriteGroup **groups; ///< Take the group with appropriate index:

protected:
	const SpriteGroup *Resolve(ResolverObject *object) const;
};


/* This contains a callback result. A failed callback has a value of
 * CALLBACK_FAILED */
struct CallbackResultSpriteGroup : SpriteGroup {
	/**
	 * Creates a spritegroup representing a callback result
	 * @param value The value that was used to represent this callback result
	 */
	CallbackResultSpriteGroup(uint16 value) :
		SpriteGroup(SGT_CALLBACK),
		result(value)
	{
		/* Old style callback results have the highest byte 0xFF so signify it is a callback result
		 * New style ones only have the highest bit set (allows 15-bit results, instead of just 8) */
		if ((this->result >> 8) == 0xFF) {
			this->result &= ~0xFF00;
		} else {
			this->result &= ~0x8000;
		}
	}

	uint16 result;
	uint16 GetCallbackResult() const { return this->result; }
};


/* A result sprite group returns the first SpriteID and the number of
 * sprites in the set */
struct ResultSpriteGroup : SpriteGroup {
	/**
	 * Creates a spritegroup representing a sprite number result.
	 * @param sprite The sprite number.
	 * @param num_sprites The number of sprites per set.
	 * @return A spritegroup representing the sprite number result.
	 */
	ResultSpriteGroup(SpriteID sprite, byte num_sprites) :
		SpriteGroup(SGT_RESULT),
		sprite(sprite),
		num_sprites(num_sprites)
	{
	}

	SpriteID sprite;
	byte num_sprites;
	SpriteID GetResult() const { return this->sprite; }
	byte GetNumResults() const { return this->num_sprites; }
};

struct TileLayoutSpriteGroup : SpriteGroup {
	TileLayoutSpriteGroup() : SpriteGroup(SGT_TILELAYOUT) {}
	~TileLayoutSpriteGroup();

	byte num_sprites; ///< Number of sprites in the spriteset, used for loading stages
	struct DrawTileSprites *dts;
};

struct IndustryProductionSpriteGroup : SpriteGroup {
	IndustryProductionSpriteGroup() : SpriteGroup(SGT_INDUSTRY_PRODUCTION) {}

	uint8 version;
	uint16 substract_input[3];
	uint16 add_output[2];
	uint8 again;
};


struct ResolverObject {
	CallbackID callback;
	uint32 callback_param1;
	uint32 callback_param2;
	bool procedure_call; ///< true if we are currently resolving a var 0x7E procedure result.

	byte trigger;
	byte count;
	uint32 last_value;
	uint32 reseed;
	VarSpriteGroupScope scope;

	bool info_view; ///< Indicates if the item is being drawn in an info window

	BaseStorageArray *psa; ///< The persistent storage array of this resolved object.

	const GRFFile *grffile; ///< GRFFile the resolved SpriteGroup belongs to

	union {
		struct {
			const struct Vehicle *self;
			const struct Vehicle *parent;
			EngineID self_type;
		} vehicle;
		struct {
			TileIndex tile;
		} canal;
		struct {
			TileIndex tile;
			const struct BaseStation *st;
			const struct StationSpec *statspec;
			CargoID cargo_type;
		} station;
		struct {
			TileIndex tile;
			Town *town;
			HouseID house_id;
		} house;
		struct {
			TileIndex tile;
			Industry *ind;
			IndustryGfx gfx;
			IndustryType type;
		} industry;
		struct {
			const struct CargoSpec *cs;
		} cargo;
		struct {
			CargoID cargo_type;
			uint8 default_selection;
			IndustryType src_industry;
			IndustryType dst_industry;
			uint8 distance;
			AIConstructionEvent event;
			uint8 count;
			uint8 station_size;
		} generic;
	} u;

	uint32 (*GetRandomBits)(const struct ResolverObject*);
	uint32 (*GetTriggers)(const struct ResolverObject*);
	void (*SetTriggers)(const struct ResolverObject*, int);
	uint32 (*GetVariable)(const struct ResolverObject*, byte, byte, bool*);
	const SpriteGroup *(*ResolveReal)(const struct ResolverObject*, const RealSpriteGroup*);

	ResolverObject() : procedure_call(false) { }
};

#endif /* NEWGRF_SPRITEGROUP_H */