From e4530c6d0cd180ab18469bf8e32fb978229dedde Mon Sep 17 00:00:00 2001
From: Bjørn Lindeijer <bjorn@lindeijer.nl>
Date: Sat, 7 Oct 2006 14:57:15 +0000
Subject: Added support for gzip compressed map layer data. Increased version
 to 0.0.22. Cleaned up overlay initialization a bit.

---
 src/resources/mapreader.cpp | 130 +++++++++++++++++++++++---------------------
 1 file changed, 68 insertions(+), 62 deletions(-)

(limited to 'src/resources/mapreader.cpp')

diff --git a/src/resources/mapreader.cpp b/src/resources/mapreader.cpp
index 2377a8f4..2aea3dc5 100644
--- a/src/resources/mapreader.cpp
+++ b/src/resources/mapreader.cpp
@@ -52,7 +52,7 @@ inflateMemory(unsigned char *in, unsigned int inLength,
     int ret;
     z_stream strm;
 
-    out = (unsigned char*)malloc(bufferSize);
+    out = (unsigned char*) malloc(bufferSize);
 
     strm.zalloc = Z_NULL;
     strm.zfree = Z_NULL;
@@ -83,13 +83,13 @@ inflateMemory(unsigned char *in, unsigned int inLength,
                 ret = Z_DATA_ERROR;
             case Z_DATA_ERROR:
             case Z_MEM_ERROR:
-                (void)inflateEnd(&strm);
+                (void) inflateEnd(&strm);
                 return ret;
         }
 
         if (ret != Z_STREAM_END)
         {
-            out = (unsigned char*)realloc(out, bufferSize * 2);
+            out = (unsigned char*) realloc(out, bufferSize * 2);
 
             if (out == NULL)
             {
@@ -106,10 +106,44 @@ inflateMemory(unsigned char *in, unsigned int inLength,
     assert(strm.avail_in == 0);
 
     outLength = bufferSize - strm.avail_out;
-    (void)inflateEnd(&strm);
+    (void) inflateEnd(&strm);
     return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
 }
 
+int
+inflateMemory(unsigned char *in, unsigned int inLength,
+              unsigned char *&out)
+{
+    unsigned int outLength = 0;
+    int ret = inflateMemory(in, inLength, out, outLength);
+
+    if (ret != Z_OK || out == NULL)
+    {
+        if (ret == Z_MEM_ERROR)
+        {
+            logger->log("Error: Out of memory while decompressing map data!");
+        }
+        else if (ret == Z_VERSION_ERROR)
+        {
+            logger->log("Error: Incompatible zlib version!");
+        }
+        else if (ret == Z_DATA_ERROR)
+        {
+            logger->log("Error: Incorrect zlib compressed data!");
+        }
+        else
+        {
+            logger->log("Error: Unknown error while decompressing map data!");
+        }
+
+        free(out);
+        out = NULL;
+        outLength = 0;
+    }
+
+    return outLength;
+}
+
 Map*
 MapReader::readMap(const std::string &filename)
 {
@@ -127,33 +161,17 @@ MapReader::readMap(const std::string &filename)
 
     // Inflate the gzipped map data
     unsigned char *inflated;
-    unsigned int inflatedSize = 0;
-    int ret = inflateMemory((unsigned char*)buffer,
-                            fileSize, inflated, inflatedSize);
+    unsigned int inflatedSize = inflateMemory((unsigned char*) buffer,
+                                              fileSize, inflated);
     free(buffer);
 
-    if (ret == Z_MEM_ERROR)
-    {
-        logger->log("Error: Out of memory while decompressing map data!");
-        return NULL;
-    }
-    else if (ret == Z_VERSION_ERROR)
-    {
-        logger->log("Error: Incompatible zlib version!");
-        return NULL;
-    }
-    else if (ret == Z_DATA_ERROR)
+    if (inflated == NULL)
     {
-        logger->log("Error: Incorrect zlib compressed data!");
-        return NULL;
-    }
-    else if (ret != Z_OK || inflated == NULL)
-    {
-        logger->log("Error: Unknown error while decompressing map data!");
+        logger->log("Could not decompress map file (%s)\n", filename.c_str());
         return NULL;
     }
 
-    xmlDocPtr doc = xmlParseMemory((char*)inflated, inflatedSize);
+    xmlDocPtr doc = xmlParseMemory((char*) inflated, inflatedSize);
     free(inflated);
 
     // Parse the inflated map data
@@ -215,39 +233,7 @@ MapReader::readMap(xmlNodePtr node, const std::string &path)
         }
     }
 
-    //set Overlays
-    ResourceManager *resman = ResourceManager::getInstance();
-    for (int i = 0; ; i++)
-    {
-        const std::string name = "overlay" + toString(i);
-
-        if (!map->hasProperty(name + "image"))
-            break; // Finished
-
-        Image *img = resman->getImage(map->getProperty(name + "image"));
-        float scrollX = 0.0f;
-        float scrollY = 0.0f;
-        float parallax = 0.0f;
-        std::stringstream ss;
-
-        if (map->hasProperty(name + "scrollX"))
-        {
-            ss.str(map->getProperty(name + "scrollX"));
-            ss >> scrollX;
-        }
-        if (map->hasProperty(name + "scrollY"))
-        {
-            ss.str(map->getProperty(name + "scrollY"));
-            ss >> scrollY;
-        }
-        if (map->hasProperty(name + "parallax"))
-        {
-            ss.str(map->getProperty(name + "parallax"));
-            ss >> parallax;
-        }
-        map->setOverlay(img, scrollX, scrollY, parallax);
-        img->decRef();
-    }
+    map->initializeOverlays();
 
     return map;
 }
@@ -293,8 +279,8 @@ MapReader::readLayer(xmlNodePtr node, Map *map, int layer)
         {
             xmlFree(encoding);
 
-            if (compression) {
-                logger->log("Warning: no layer compression supported!");
+            if (compression && !xmlStrEqual(compression, BAD_CAST "gzip")) {
+                logger->log("Warning: only gzip layer compression supported!");
                 xmlFree(compression);
                 return;
             }
@@ -322,12 +308,32 @@ MapReader::readLayer(xmlNodePtr node, Map *map, int layer)
 
             int binLen;
             unsigned char *binData =
-                php_base64_decode(charData, strlen((char*)charData),
-                        &binLen);
+                php_base64_decode(charData, strlen((char*)charData), &binLen);
 
             delete[] charData;
 
             if (binData) {
+                if (compression) {
+                    if (xmlStrEqual(compression, BAD_CAST "gzip")) {
+                        // Inflate the gzipped layer data
+                        unsigned char *inflated;
+                        unsigned int inflatedSize =
+                            inflateMemory(binData, binLen, inflated);
+
+                        free(binData);
+                        binData = inflated;
+                        binLen = inflatedSize;
+
+                        if (inflated == NULL)
+                        {
+                            logger->log("Error: Could not decompress layer!");
+                            xmlFree(compression);
+                            return;
+                        }
+                    }
+                    xmlFree(compression);
+                }
+
                 for (int i = 0; i < binLen - 3; i += 4) {
                     int gid = binData[i] |
                         binData[i + 1] << 8 |
-- 
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