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