Automatically fixup Steam G1.DAT

OpenLoco · Jan 22, 2018 · a9b6d8d · a9b6d8d
1 parent 4e7c48c
commit a9b6d8d
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Showing 2 changed files with 26 additions and 2 deletions.
diff --git a/src/openloco/graphics/gfx.cpp b/src/openloco/graphics/gfx.cpp
@@ -1,4 +1,5 @@
 #include <fstream>
+#include <iostream>
 
 #include "../interop/interop.hpp"
 #include "../environment.h"
@@ -38,6 +39,16 @@ namespace openloco::gfx
                 throw std::runtime_error("Reading g1 file header failed.");
             }
 
+            if (header.num_entries != LOCO_G1_ELEMENT_COUNT)
+            {
+                std::cout << "G1 element count doesn't match expected value: ";
+                std::cout << "Expected " << LOCO_G1_ELEMENT_COUNT << "; Got " << header.num_entries << std::endl;
+                if (header.num_entries == LOCO_G1_ELEMENT_COUNT_STEAM)
+                {
+                    std::cout << "Got Steam G1.DAT variant, will fix elements automatically." << std::endl;
+                }
+            }
+
             // Read element headers
             if (!stream.read((char *)_g1Elements.get(), header.num_entries * sizeof(g1_element_t)))
             {
@@ -52,12 +63,24 @@ namespace openloco::gfx
                 throw std::runtime_error("Reading g1 elements failed.");
             }
 
+            stream.close();
+
             // Adjust memory offsets
             for (uint32_t i = 0; i < header.num_entries; i++)
             {
                 _g1Elements[i].offset += (int32_t)g1Buffer;
             }
-            stream.close();
+
+            // The steam g1.dat is missing two localised tutorial icons, and a smaller font variant
+            // This code copies the closest variants into their place, and moves other elements accordingly
+            if (header.num_entries == LOCO_G1_ELEMENT_COUNT_STEAM)
+            {
+                memmove(&_g1Elements[3551], &_g1Elements[3549], sizeof(g1_element_t) * (header.num_entries - 3549)); 
+                memcpy(&_g1Elements[3549], &_g1Elements[3551], sizeof(g1_element_t));
+                memcpy(&_g1Elements[3550], &_g1Elements[3551], sizeof(g1_element_t));
+                memcpy(&_g1Elements[3898], &_g1Elements[1788], sizeof(g1_element_t) * 223);
+
+            }
         }
         catch (const std::exception &e)
         {

diff --git a/src/openloco/graphics/gfx.h b/src/openloco/graphics/gfx.h
@@ -4,7 +4,8 @@
 #include "../localisation/stringmgr.h"
 #include "../openloco.h"
 
-#define LOCO_G1_ELEMENT_COUNT 0x1A10
+#define LOCO_G1_ELEMENT_COUNT       0x101A
+#define LOCO_G1_ELEMENT_COUNT_STEAM 0x0F38
 
 namespace openloco::gfx
 {