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(svn r556) -newgrf: Some seemingly proper support for loading stages of grf files (octo & pasky).

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This commit is contained in:
darkvater
2004-11-12 23:26:02 +00:00
parent 2ab4669251
commit 76341a9173
2 changed files with 88 additions and 19 deletions
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82
grfspecial.c
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@@ -30,6 +30,7 @@ struct GRFFile {
static struct GRFFile *_cur_grffile, *_first_grffile;
static int _cur_spriteid;
static int _cur_stage;
static int32 _paramlist[0x7f];
static int _param_max;
@@ -77,7 +78,8 @@ do { \
} while (0)
static byte INLINE grf_load_byte(byte **buf) {
static byte INLINE grf_load_byte(byte **buf)
{
return *(*buf)++;
}
@@ -115,19 +117,16 @@ static struct GRFFile *GetFileByGRFID(uint32 grfid)
return file;
}
#if 0
/* Will be used very soon. */
static struct GRFFile *GetFileByFilename(char *filename)
static struct GRFFile *GetFileByFilename(const char *filename)
{
struct GRFFile *file;
file = _first_grffile;
while ((file != NULL) && strcmp(file->filename, filename))
file = retval->next;
file = file->next;
return file;
}
#endif
typedef bool (*VCI_Handler)(uint engine, int numinfo, int prop, byte **buf, int len);
@@ -900,7 +899,6 @@ static void SkipIf(byte *buf, int len)
* B condition-type
* V value
* B num-sprites */
/* TODO: We only support few tests. */
/* TODO: More params. More condition types. */
uint8 param;
uint8 paramsize;
@@ -933,8 +931,7 @@ static void SkipIf(byte *buf, int len)
param_val = _opt.landscape;
break;
case 0x84:
/* XXX: This should be always true (at least until we get multiple loading stages?). */
param_val = 1;
param_val = _cur_stage;
break;
case 0x85:
param_val = _ttdpatch_flags[cond_val / 0x20];
@@ -1231,7 +1228,6 @@ static void GRFInhibit(byte *buf, int len)
* B num Number of GRFIDs that follow
* D grfids GRFIDs of the files to deactivate */
/* XXX: Should we handle forward deactivations? */
/* XXX: Even so will fully work only with stages support. */
byte num;
int i;
@@ -1271,7 +1267,8 @@ static void InitializeGRFSpecial(void)
| (1 << 0x17); /* newstartyear */
}
void InitNewGRFFile(const char *filename, int sprite_offset) {
void InitNewGRFFile(const char *filename, int sprite_offset)
{
struct GRFFile *newfile;
newfile = malloc(sizeof(struct GRFFile));
@@ -1297,12 +1294,12 @@ void InitNewGRFFile(const char *filename, int sprite_offset) {
/* Here we perform initial decoding of some special sprites (as are they
* described at http://www.ttdpatch.net/src/newgrf.txt, but this is only a very
* partial implementation yet; also, we ignore the stages stuff). */
* partial implementation yet). */
/* 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(int num, int spriteid)
void DecodeSpecialSprite(const char *filename, int num, int spriteid, int stage)
{
#define NUM_ACTIONS 0xF
static const SpecialSpriteHandler handlers[NUM_ACTIONS] = {
@@ -1334,17 +1331,70 @@ void DecodeSpecialSprite(int num, int spriteid)
initialized = 1;
}
_cur_stage = stage;
_cur_spriteid = spriteid;
for (i = 0; i != num; i++)
buf[i] = FioReadByte();
action = buf[0];
if (action < NUM_ACTIONS) {
if (_cur_grffile->flags & 0x0001)
/* XXX: Action 0x03 is temporarily processed together with actions 0x01
* and 0x02 before it is fixed to be reentrant (probably storing the
* superset information in {struct GRFFile}). --pasky */
if (stage == 0) {
/* During initialization, actions 0, 3, 4, 5 and 7 are ignored. */
if ((action == 0x00) /*|| (action == 0x03)*/ || (action == 0x04)
|| (action == 0x05) || (action == 0x07)) {
DEBUG (grf, 5) ("DecodeSpecialSprite: Action: %x, Stage 0, Skipped", action);
/* Do nothing. */
} else if (action < NUM_ACTIONS) {
DEBUG (grf, 5) ("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, 3, 4, 5, 7, 8, 9 and 0A are
* carried out. All others are ignored, because they only need to be
* processed once at initialization. */
if ((_cur_grffile == NULL) || strcmp(_cur_grffile->filename, filename))
_cur_grffile = GetFileByFilename(filename);
if (_cur_grffile == NULL)
error("File ``%s'' lost in cache.\n", filename);
if (!(_cur_grffile->flags & 0x0001)) {
DEBUG (grf, 5) ("DecodeSpecialSprite: Action: %x, Stage 1, Not activated", action);
/* Do nothing. */
} else if ((action == 0x00) /*|| (action == 0x03)*/ || (action == 0x04) || (action == 0x05)
|| (action == 0x07) || (action == 0x08) || (action == 0x09) || (action == 0x0A)) {
DEBUG (grf, 5) ("DecodeSpecialSprite: Action: %x, Stage 1", action);
handlers[action](buf, num);
} else if (action < NUM_ACTIONS) {
DEBUG (grf, 5) ("DecodeSpecialSprite: Action: %x, Stage 1, Skipped", action);
/* Do nothing. */
} else {
grfmsg(GMS_WARN, "Unknown special sprite action %x, skipping.", action);
}
} else {
grfmsg(GMS_WARN, "Unknown special sprite action %x, skipping.", action);
error("Invalid stage %d", stage);
}
free(buf);