diff --git a/src/lang/english.txt b/src/lang/english.txt
index 98234f09a5..ca1baa8aac 100644
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -2915,6 +2915,11 @@ STR_NEWGRF_DUPLICATE_GRFID :{WHITE}Cannot a
STR_NEWGRF_NOT_FOUND :{RED}Matching file not found
STR_NEWGRF_DISABLED :{RED}Disabled
+STR_NEWGRF_COMPATIBLE_LOADED :{ORANGE}Matching file not found (compatible GRF loaded)
+
+STR_NEWGRF_COMPATIBLE_LOAD_WARNING :{WHITE}Compatible GRF(s) loaded for missing files
+STR_NEWGRF_DISABLED_WARNING :{WHITE}Missing GRF file(s) have been disabled
+STR_NEWGRF_NOT_FOUND_WARNING :{WHITE}Missing GRF file(s) to be able to load game
STR_CURRENCY_WINDOW :{WHITE}Custom currency
STR_CURRENCY_EXCHANGE_RATE :{LTBLUE}Exchange rate: {ORANGE}{CURRENCY} = £ {COMMA}
diff --git a/src/newgrf_config.cpp b/src/newgrf_config.cpp
index 22cccaee64..534509e89c 100644
--- a/src/newgrf_config.cpp
+++ b/src/newgrf_config.cpp
@@ -195,24 +195,45 @@ void ResetGRFConfig(bool defaults)
}
-/* Check if all GRFs in the GRF Config can be loaded */
-bool IsGoodGRFConfigList(void)
+/** Check if all GRFs in the GRF config from a savegame can be loaded.
+ * @return will return any of the following 3 values:
+ *
+ * - GCF_ACTIVATED: No problems occured, all GRF files were found and loaded
+ *
- GCF_COMPATIBLE: For one or more GRF's no exact match was found, but a
+ * compatible GRF with the same grfid was found and used instead
+ *
- GCF_NOT_FOUND: For one or more GRF's no match was found at all
+ *
*/
+GCF_Flags IsGoodGRFConfigList(void)
{
- bool res = true;
- GRFConfig *c;
+ GCF_Flags res = GCF_ACTIVATED;
- for (c = _grfconfig; c != NULL; c = c->next) {
+ for (GRFConfig *c = _grfconfig; c != NULL; c = c->next) {
const GRFConfig *f = FindGRFConfig(c->grfid, c->md5sum);
if (f == NULL) {
- char buf[512], *p = buf;
+ char buf[256], *p = buf;
+
+ /* If we have not found the exactly matching GRF try to find one with the
+ * same grfid, as it most likely is compatible */
+ f = FindGRFConfig(c->grfid);
+ if (f != NULL) {
+ md5sumToString(buf, lastof(buf), c->md5sum);
+ DEBUG(grf, 1, "NewGRF %08X (%s) not found; checksum %s. Compatibility mode on", BSWAP32(c->grfid), c->filename, buf);
+ SETBIT(c->flags, GCF_COMPATIBLE);
+
+ /* Non-found has precedence over compatibility load */
+ if (res != GCF_NOT_FOUND) res = GCF_COMPATIBLE;
+ goto compatible_grf;
+ }
- p += snprintf(p, lastof(buf) - p, "Couldn't find NewGRF %08X (%s) checksum ", BSWAP32(c->grfid), c->filename);
- md5sumToString(p, lastof(buf), c->md5sum);
- ShowInfo(buf);
+ /* No compatible grf was found, mark it as disabled */
+ md5sumToString(buf, lastof(buf), c->md5sum);
+ DEBUG(grf, 0, "NewGRF %08X (%s) not found; checksum %s", BSWAP32(c->grfid), c->filename, buf);
- res = false;
+ SETBIT(c->flags, GCF_NOT_FOUND);
+ res = GCF_NOT_FOUND;
} else {
- DEBUG(grf, 1, "Loading GRF %08X from '%s'", BSWAP32(c->grfid), f->filename);
+compatible_grf:
+ DEBUG(grf, 1, "Loading GRF %08X from %s", BSWAP32(f->grfid), f->filename);
/* The filename could be the filename as in the savegame. As we need
* to load the GRF here, we need the correct filename, so overwrite that
* in any case and set the name and info when it is not set already.
@@ -221,6 +242,7 @@ bool IsGoodGRFConfigList(void)
if (!HASBIT(c->flags, GCF_COPY)) {
free(c->filename);
c->filename = strdup(f->filename);
+ memcpy(c->md5sum, f->md5sum, sizeof(c->md5sum));
if (c->name == NULL) c->name = strdup(f->name);
if (c->info == NULL) c->info = strdup(f->info);
}
diff --git a/src/newgrf_config.h b/src/newgrf_config.h
index 7cc90d41f5..0864a63a2d 100644
--- a/src/newgrf_config.h
+++ b/src/newgrf_config.h
@@ -4,15 +4,16 @@
#define NEWGRF_CONFIG_H
/* GRF config bit flags */
-enum {
- GCF_DISABLED,
- GCF_NOT_FOUND,
- GCF_ACTIVATED,
- GCF_SYSTEM,
- GCF_UNSAFE,
- GCF_STATIC,
+typedef enum {
+ GCF_DISABLED, ///< GRF file is disabled
+ GCF_NOT_FOUND, ///< GRF file was not found in the local cache
+ GCF_ACTIVATED, ///< GRF file is active
+ GCF_SYSTEM, ///< GRF file is an openttd-internal system grf
+ GCF_UNSAFE, ///< GRF file is unsafe for static usage
+ GCF_STATIC, ///< GRF file is used statically (can be used in any MP game)
+ GCF_COMPATIBLE,///< GRF file does not exactly match the requested GRF (different MD5SUM), but grfid matches)
GCF_COPY, ///< The data is copied from a grf in _all_grfs
-};
+} GCF_Flags;
typedef struct GRFConfig {
char *filename;
@@ -48,7 +49,7 @@ void AppendStaticGRFConfigs(GRFConfig **dst);
void ClearGRFConfig(GRFConfig **config);
void ClearGRFConfigList(GRFConfig **config);
void ResetGRFConfig(bool defaults);
-bool IsGoodGRFConfigList(void);
+GCF_Flags IsGoodGRFConfigList(void);
bool FillGRFDetails(GRFConfig *config, bool is_static);
char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last);
diff --git a/src/newgrf_gui.cpp b/src/newgrf_gui.cpp
index 8b12035637..126b4b4fb2 100644
--- a/src/newgrf_gui.cpp
+++ b/src/newgrf_gui.cpp
@@ -71,8 +71,9 @@ static void ShowNewGRFInfo(const GRFConfig *c, uint x, uint y, uint w, bool show
}
/* Show flags */
- if (HASBIT(c->flags, GCF_NOT_FOUND)) y += DrawStringMultiLine(x, y, STR_NEWGRF_NOT_FOUND, w);
- if (HASBIT(c->flags, GCF_DISABLED)) y += DrawStringMultiLine(x, y, STR_NEWGRF_DISABLED, w);
+ if (HASBIT(c->flags, GCF_NOT_FOUND)) y += DrawStringMultiLine(x, y, STR_NEWGRF_NOT_FOUND, w);
+ if (HASBIT(c->flags, GCF_DISABLED)) y += DrawStringMultiLine(x, y, STR_NEWGRF_DISABLED, w);
+ if (HASBIT(c->flags, GCF_COMPATIBLE)) y += DrawStringMultiLine(x, y, STR_NEWGRF_COMPATIBLE_LOADED, w);
/* Draw GRF info if it exists */
if (c->info != NULL && !StrEmpty(c->info)) {
@@ -317,7 +318,9 @@ static void NewGRFWndProc(Window *w, WindowEvent *e)
if (HASBIT(c->flags, GCF_NOT_FOUND) || HASBIT(c->flags, GCF_DISABLED)) {
pal = PALETTE_TO_RED;
} else if (HASBIT(c->flags, GCF_STATIC)) {
- pal = PALETTE_TO_YELLOW;
+ pal = PALETTE_TO_GREY;
+ } else if (HASBIT(c->flags, GCF_COMPATIBLE)) {
+ pal = PALETTE_TO_ORANGE;
} else if (HASBIT(c->flags, GCF_ACTIVATED)) {
pal = PALETTE_TO_GREEN;
} else {
diff --git a/src/openttd.cpp b/src/openttd.cpp
index b07622bf39..3640b0aee1 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1188,8 +1188,14 @@ bool AfterLoadGame(void)
// convert road side to my format.
if (_opt.road_side) _opt.road_side = 1;
- /* Check all NewGRFs are present */
- if (!IsGoodGRFConfigList()) return false;
+ /* Check if all NewGRFs are present, we are very strict in MP mode */
+ GCF_Flags gcf_res = IsGoodGRFConfigList();
+ if (_networking && gcf_res != GCF_ACTIVATED) return false;
+
+ switch (gcf_res) {
+ case GCF_COMPATIBLE: _switch_mode_errorstr = STR_NEWGRF_COMPATIBLE_LOAD_WARNING; break;
+ case GCF_NOT_FOUND: _switch_mode_errorstr = STR_NEWGRF_DISABLED_WARNING; break;
+ }
/* Update current year
* must be done before loading sprites as some newgrfs check it */