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(svn r2868) Change the way NewGRFs are loaded: The loading process i no longer bolted onto the normal graphics loading.

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This has two major advantages:
- Removal of a maze of global variables and distinction of cases from the sprite loading routines, which weren't directly related to the loading process in the first place
- NewGRF actions no longer occupy sprite slots - for example when using DBSetXL this saves about 2000 slots! (you could regard this as a bug fix)
If i didn't make a major mistake this change should have no negative effect on NewGRF support, please test!
This commit is contained in:
tron
2005-08-15 11:39:13 +00:00
parent d057d8b366
commit 52c859cbe8
4 changed files with 202 additions and 299 deletions
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316
newgrf.c
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@@ -10,6 +10,7 @@
#include "fileio.h"
#include "functions.h"
#include "engine.h"
#include "spritecache.h"
#include "station.h"
#include "sprite.h"
#include "newgrf.h"
@@ -25,9 +26,9 @@
* served as subject to the initial testing of this codec. */
extern int _skip_sprites;
extern int _replace_sprites_count[16];
extern int _replace_sprites_offset[16];
uint16 _custom_sprites_base;
static int _skip_sprites; // XXX
static uint _file_index; // XXX
extern int _traininfo_vehicle_pitch;
static GRFFile *_cur_grffile;
@@ -1156,14 +1157,29 @@ static void NewSpriteSet(byte *buf, int len)
* different sprites that make up a station */
/* TODO: No stations support. */
uint8 feature;
uint num_sets;
uint num_ents;
uint i;
check_length(len, 4, "NewSpriteSet");
feature = buf[1];
num_sets = buf[2];
num_ents = buf[3];
_cur_grffile->spriteset_start = _cur_spriteid + 1;
_cur_grffile->spriteset_start = _cur_spriteid;
_cur_grffile->spriteset_feature = feature;
_cur_grffile->spriteset_numsets = buf[2];
_cur_grffile->spriteset_numents = buf[3];
_cur_grffile->spriteset_numsets = num_sets;
_cur_grffile->spriteset_numents = num_ents;
DEBUG(grf, 7) (
"New sprite set at %d of type %d, "
"consisting of %d sets with %d views each (total %d)",
_cur_spriteid, feature, num_sets, num_ents, num_sets * num_ents
);
for (i = 0; i < num_sets * num_ents; i++) {
LoadNextSprite(_cur_spriteid++, _file_index);
}
}
/* Action 0x02 */
@@ -1790,7 +1806,7 @@ static void SkipIf(byte *buf, int len)
}
numsprites = grf_load_byte(&buf);
grfmsg(GMS_NOTICE, "Skipping %d->+%d sprites, test was true.", _cur_spriteid - _cur_grffile->sprite_offset, numsprites);
grfmsg(GMS_NOTICE, "Skipping %d sprites, test was true.", numsprites);
_skip_sprites = numsprites;
if (_skip_sprites == 0) {
/* Zero means there are no sprites to skip, so
@@ -1838,27 +1854,23 @@ static void SpriteReplace(byte *buf, int len)
* B num-sprites How many sprites are in this set
* W first-sprite First sprite number to replace */
uint8 num_sets;
int i;
uint i;
buf++; /* skip action byte */
num_sets = grf_load_byte(&buf);
if (num_sets > 16) {
grfmsg(GMS_ERROR, "SpriteReplace: Too many sets (%d), taking only the first 16!", num_sets);
}
for (i = 0; i < num_sets; i++) {
uint8 num_sprites = grf_load_byte(&buf);
uint16 first_sprite = grf_load_word(&buf);
uint j;
for (i = 0; i < 16; i++) {
if (i < num_sets) {
uint8 num_sprites = grf_load_byte(&buf);
uint16 first_sprite = grf_load_word(&buf);
grfmsg(GMS_NOTICE,
"SpriteReplace: [Set %d] Changing %d sprites, beginning with %d",
i, num_sprites, first_sprite
);
_replace_sprites_count[i] = num_sprites;
_replace_sprites_offset[i] = first_sprite;
grfmsg(GMS_NOTICE, "SpriteReplace: [Set %d] Changing %d sprites, beginning with %d",
i, num_sprites, first_sprite);
} else {
_replace_sprites_count[i] = 0;
_replace_sprites_offset[i] = 0;
for (j = 0; j < num_sprites; j++) {
LoadNextSprite(first_sprite + j, _file_index); // XXX
}
}
}
@@ -2090,7 +2102,7 @@ static void InitializeGRFSpecial(void)
| (1 << 0x17); /* newstartyear */
}
void InitNewGRFFile(const char *filename, int sprite_offset)
static void InitNewGRFFile(const char* filename, int sprite_offset)
{
GRFFile *newfile;
@@ -2126,45 +2138,8 @@ void InitNewGRFFile(const char *filename, int sprite_offset)
/* XXX: We consider GRF files trusted. It would be trivial to exploit OTTD by
* a crafted invalid GRF file. We should tell that to the user somehow, or
* better make this more robust in the future. */
void DecodeSpecialSprite(const char *filename, int num, int spriteid, int stage)
static void DecodeSpecialSprite(const char* filename, uint num, uint stage)
{
#define NUM_ACTIONS 0xF
static const SpecialSpriteHandler handlers[NUM_ACTIONS] = {
/* 0x0 */ VehicleChangeInfo,
/* 0x1 */ NewSpriteSet,
/* 0x2 */ NewSpriteGroup,
/* 0x3 */ NewVehicle_SpriteGroupMapping,
/* 0x4 */ VehicleNewName,
/* 0x5 */ GraphicsNew,
/* 0x6 */ CfgApply,
/* 0x7 */ SkipIf,
/* 0x8 */ GRFInfo,
/* 0x9 */ SkipIf,
/* 0xa */ SpriteReplace,
/* 0xb */ GRFError,
/* 0xc */ GRFComment,
/* 0xd */ ParamSet,
/* 0xe */ GRFInhibit,
};
static bool initialized = false;
byte action;
byte *buf = malloc(num);
if (buf == NULL) error("DecodeSpecialSprite: Could not allocate memory");
if (!initialized) {
InitializeGRFSpecial();
initialized = true;
}
_cur_stage = stage;
_cur_spriteid = spriteid;
FioReadBlock(buf, num);
action = buf[0];
/* XXX: There is a difference between staged loading in TTDPatch and
* here. In TTDPatch, for some reason actions 1 and 2 are carried out
* during stage 0, whilst action 3 is carried out during stage 1 (to
@@ -2174,82 +2149,159 @@ void DecodeSpecialSprite(const char *filename, int num, int spriteid, int stage)
* in an earlier stage than associating, so... We just process actions
* 1 and 2 in stage 1 now, let's hope that won't get us into problems.
* --pasky */
uint32 action_mask = (stage == 0) ? 0x0001FF40 : 0x0001FFBF;
static const SpecialSpriteHandler handlers[] = {
/* 0x00 */ VehicleChangeInfo,
/* 0x01 */ NewSpriteSet,
/* 0x02 */ NewSpriteGroup,
/* 0x03 */ NewVehicle_SpriteGroupMapping,
/* 0x04 */ VehicleNewName,
/* 0x05 */ GraphicsNew,
/* 0x06 */ CfgApply,
/* 0x07 */ SkipIf,
/* 0x08 */ GRFInfo,
/* 0x09 */ SkipIf,
/* 0x0A */ SpriteReplace,
/* 0x0B */ GRFError,
/* 0x0C */ GRFComment,
/* 0x0D */ ParamSet,
/* 0x0E */ GRFInhibit,
/* 0x0F */ NULL, // TODO implement
/* 0x10 */ NULL // TODO implement
};
if (stage == 0) {
switch (action) {
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x07:
/* During initialization, these actions are ignored. */
DEBUG (grf, 7) (
"DecodeSpecialSprite: Action: %x, Stage 0, Skipped", action);
break;
byte* buf = malloc(num);
byte action;
default:
if (action < NUM_ACTIONS) {
DEBUG (grf, 7) ("DecodeSpecialSprite: Action: %x, Stage 0", action);
handlers[action](buf, num);
} else {
grfmsg(GMS_WARN,
"Unknown special sprite action %x, skipping.", action);
}
}
} else if (stage == 1) {
/* A .grf file is activated only if it was active when the game was
* started. If a game is loaded, only its active .grfs will be
* reactivated, unless "loadallgraphics on" is used. A .grf file is
* considered active if its action 8 has been processed, i.e. its
* action 8 hasn't been skipped using an action 7.
*
* During activation, only actions 0, 1, 2, 3, 4, 5, 7, 8, 9, 0A and 0B are
* carried out. All others are ignored, because they only need to be
* processed once at initialization. */
if (buf == NULL) error("DecodeSpecialSprite: Could not allocate memory");
if (_cur_grffile == NULL || strcmp(_cur_grffile->filename, filename) != 0)
_cur_grffile = GetFileByFilename(filename);
FioReadBlock(buf, num);
action = buf[0];
if (_cur_grffile == NULL)
error("File ``%s'' lost in cache.\n", filename);
if (_cur_grffile->flags & 0x0001) {
switch (action) {
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x07:
case 0x08:
case 0x09:
case 0x0A:
case 0x0B:
DEBUG (grf, 7) ("DecodeSpecialSprite: Action: %x, Stage 1", action);
handlers[action](buf, num);
break;
default:
if (action < NUM_ACTIONS) {
DEBUG (grf, 7) (
"DecodeSpecialSprite: Action: %x, Stage 1, Skipped", action);
} else {
grfmsg(GMS_WARN,
"Unknown special sprite action %x, skipping.", action);
}
break;
}
} else {
DEBUG (grf, 7) (
"DecodeSpecialSprite: Action: %x, Stage 1, Not activated", action);
}
} else {
error("Invalid stage %d", stage);
if (action >= lengthof(handlers)) {
DEBUG(grf, 7) ("Skipping unknown action 0x%02X", action);
free(buf);
return;
}
if (!HASBIT(action_mask, action)) {
DEBUG(grf, 7) ("Skipping action 0x%02X in stage %d", action, stage);
free(buf);
return;
}
if (handlers[action] == NULL) {
DEBUG(grf, 7) ("Skipping unsupported Action 0x%02X", action);
free(buf);
return;
}
DEBUG(grf, 7) ("Handling action 0x%02X in stage %d", action, stage);
handlers[action](buf, num);
free(buf);
#undef NUM_ACTIONS
}
static void LoadNewGRFFile(const char* filename, uint file_index, uint stage)
{
uint16 num;
/* A .grf file is activated only if it was active when the game was
* started. If a game is loaded, only its active .grfs will be
* reactivated, unless "loadallgraphics on" is used. A .grf file is
* considered active if its action 8 has been processed, i.e. its
* action 8 hasn't been skipped using an action 7.
*
* During activation, only actions 0, 1, 2, 3, 4, 5, 7, 8, 9, 0A and 0B are
* carried out. All others are ignored, because they only need to be
* processed once at initialization. */
if (stage != 0) {
_cur_grffile = GetFileByFilename(filename);
if (_cur_grffile == NULL) error("File ``%s'' lost in cache.\n", filename);
if (!(_cur_grffile->flags & 0x0001)) return;
}
FioOpenFile(file_index, filename);
_file_index = file_index; // XXX
DEBUG(grf, 7) ("Reading NewGRF-file '%s'", filename);
/* Skip the first sprite; we don't care about how many sprites this
* does contain; newest TTDPatches and George's longvehicles don't
* neither, apparently. */
if (FioReadWord() == 4 && FioReadByte() == 0xFF) {
FioReadDword();
} else {
error("Custom .grf has invalid format.");
}
_skip_sprites = 0; // XXX
while ((num = FioReadWord()) != 0) {
byte type = FioReadByte();
if (type == 0xFF) {
if (_skip_sprites == 0) {
DecodeSpecialSprite(filename, num, stage);
continue;
} else {
FioSkipBytes(num);
}
} else {
if (_skip_sprites == 0) DEBUG(grf, 7) ("Skipping unexpected sprite");
FioSkipBytes(7);
num -= 8;
if (type & 2) {
FioSkipBytes(num);
} else {
while (num > 0) {
int8 i = FioReadByte();
if (i >= 0) {
num -= i;
FioSkipBytes(i);
} else {
i = -(i >> 3);
num -= i;
FioReadByte();
}
}
}
}
if (_skip_sprites > 0) _skip_sprites--;
}
}
void LoadNewGRF(uint load_index, uint file_index)
{
static bool initialized = false; // XXX yikes
uint stage;
if (!initialized) {
InitializeGRFSpecial();
initialized = true;
}
/* Load newgrf sprites
* in each loading stage, (try to) open each file specified in the config
* and load information from it. */
_custom_sprites_base = load_index;
for (stage = 0; stage < 2; stage++) {
uint j;
_cur_stage = stage;
_cur_spriteid = load_index;
for (j = 0; j != lengthof(_newgrf_files) && _newgrf_files[j] != NULL; j++) {
if (!FiosCheckFileExists(_newgrf_files[j])) {
// TODO: usrerror()
error("NewGRF file missing: %s", _newgrf_files[j]);
}
if (stage == 0) InitNewGRFFile(_newgrf_files[j], _cur_spriteid);
LoadNewGRFFile(_newgrf_files[j], file_index++, stage); // XXX different file indices in both stages?
DEBUG(spritecache, 2) ("Currently %i sprites are loaded", load_index);
}
}
}