Implemented resource manager which can load textures and levels.

Implemented script to generate Resources.g.h file linking assets to code.
Added assets from old project.

build/prepareAssets.py

@@ -0,0 +1,142 @@
+#!/usr/bin/python3
+import os
+import sys
+
+#
+# Constants
+#
+
+ASSETS_DIR="assets"
+RESOURCES_FILE="src/resources/Resources.g.h"
+
+RESOURCES_FILE_HEADER=("// WARNING: This file is auto generated by the build/prepareAssets.py script.\n"
+                       "#ifndef STORAGE_RESOURCES_G_H_\n"
+                       "#define STORAGE_RESOURCES_G_H_\n"
+                       "\n"
+                       "#include <resources/ResourceInfo.h>\n"
+                       "\n"
+                       "namespace farmlands {\n"
+                       "namespace resources {\n"
+                       "\n")
+
+RESOURCES_FILE_FOOTER=("\n"
+                       "}\n"
+                       "}\n"
+                       "#endif /* STORAGE_RESOURCES_G_H_ */\n")
+
+R_HEADER=("    /**\n"
+          "     * This namespace contains all the resource IDs, used by the resource manager.\n"
+          "     * The IDs are generated at build time by the 'prepareAssets.py' script.\n"
+          "     */\n"
+          "    namespace R {\n")
+
+R_FOOTER="    }\n"
+
+RINFO_HEADER=("    /**\n"
+              "     * This array contains the names of all the files, and the corresponding file type.\n"
+              "     */\n"
+              "    const ResourceInfo RInfo[] = {\n")
+
+RINFO_FOOTER="    };\n"
+
+
+#
+# File types
+#
+FILE_TYPES = [
+    ([".png", ".bmp"], "Texture"),
+    ([".level"], "Level"),
+    ([".csv"], "LevelLayer"),
+    ([".ttf"], "Font"),    
+]
+
+
+#
+# Capitalizes the given string by converting the first character to uppercase.
+# It does not convert the other characters to lowercase.
+#
+def capitalize(s):
+    if len(s) == 0:
+        return s
+    
+    return s[0].upper() + s[1:]
+
+#
+# Obtains the file type using FILE_TYPES constant
+#
+def getFileType(fileName):
+    ext = os.path.splitext(fileName)[1]
+
+    for (extensions, type) in FILE_TYPES:
+        if ext in extensions:
+            return type
+        
+    return "None"
+
+
+#
+# Main routine
+#
+if __name__ == '__main__':
+    r = ""
+    rInfo = ""
+    rInfoBegin = ""
+    
+    assetId = 0
+    
+    print ("Preparing assets...")
+    
+    # Build R and RInfo
+    for assetDir in os.listdir(ASSETS_DIR):
+        assetDirPath=os.path.join(ASSETS_DIR, assetDir)
+        
+        # Warning for non-directories
+        if not os.path.isdir(assetDirPath):
+            sys.stderr.writeline("Warning: file {0} is in the root 'assets' folder, and it will not be imported.".format(assetDir))
+            continue
+        
+        # Create R enum
+        assetIdBegin = assetId
+        rInfoBegin += "    const int RInfo_{0}_Begin = {1};\n".format(capitalize(assetDir), assetIdBegin)
+        r += ("        enum " + capitalize(assetDir) + "\n"
+              "        {\n")
+                
+        # Get items in directory
+        for (dir, dirs, files) in os.walk(assetDirPath):
+            
+            # R prefix - remove assetDirPath from path, replace path separators with _
+            RdirPrefix = os.path.relpath(dir, assetDirPath)
+            RdirPrefix = RdirPrefix.replace("/", "_").replace("\\", "_")
+            if (RdirPrefix == "."):
+                RdirPrefix = ""
+            else:
+                RdirPrefix += "_"
+            
+            for f in files:
+                # Append to R
+                fResName = RdirPrefix + capitalize(os.path.splitext(f)[0])
+                r += "            {0} = {1},\n".format(fResName, assetId)
+                assetId += 1
+                
+                # RInfo path should be relative to assets directory
+                fPath = os.path.join(dir, f)
+                fPath = os.path.relpath(fPath, ASSETS_DIR)
+                fType = getFileType(f)
+                
+                rInfo += "        {{ \"{0}\", ResourceType::{1} }},\n".format(fPath, fType) # TODO: obtain resource type
+        
+        # Finish R enum
+        r += "        };\n"
+        
+    # Build resource header file
+    resFile = RESOURCES_FILE_HEADER
+    resFile += R_HEADER + r + R_FOOTER
+    resFile += "\n" + rInfoBegin + "\n"
+    resFile += RINFO_HEADER + rInfo + RINFO_FOOTER
+    resFile += RESOURCES_FILE_FOOTER
+    
+    # Write resource file
+    f = open(RESOURCES_FILE, "w")
+    f.write(resFile)
+    f.close()
+