diff -Nru mapcache-1.12.0/CMakeLists.txt mapcache-1.12.1/CMakeLists.txt
--- mapcache-1.12.0/CMakeLists.txt	2022-01-27 19:52:39.000000000 +0000
+++ mapcache-1.12.1/CMakeLists.txt	2022-03-24 13:10:09.000000000 +0000
@@ -13,7 +13,7 @@
 
 set (MAPCACHE_VERSION_MAJOR 1)
 set (MAPCACHE_VERSION_MINOR 12)
-set (MAPCACHE_VERSION_REVISION 0)
+set (MAPCACHE_VERSION_REVISION 1)
 
 if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
    set(CMAKE_INSTALL_LIBDIR lib)
diff -Nru mapcache-1.12.0/debian/changelog mapcache-1.12.1/debian/changelog
--- mapcache-1.12.0/debian/changelog	2022-02-23 04:50:31.000000000 +0000
+++ mapcache-1.12.1/debian/changelog	2022-12-05 08:00:00.000000000 +0000
@@ -1,3 +1,15 @@
+mapcache (1.12.1-1~jammy0) jammy; urgency=medium
+
+  * No change rebuild for Jammy.
+
+ -- Angelos Tzotsos <gcpp.kalxas@gmail.com>  Mon, 05 Dec 2022 10:00:00 +0200
+
+mapcache (1.12.1-1) unstable; urgency=medium
+
+  * New upstream release.
+
+ -- Bas Couwenberg <sebastic@debian.org>  Thu, 24 Mar 2022 16:30:40 +0100
+
 mapcache (1.12.0-1) unstable; urgency=medium
 
   * New upstream release.
diff -Nru mapcache-1.12.0/.github/workflows/build-windows.yml mapcache-1.12.1/.github/workflows/build-windows.yml
--- mapcache-1.12.0/.github/workflows/build-windows.yml	2022-01-27 19:52:39.000000000 +0000
+++ mapcache-1.12.1/.github/workflows/build-windows.yml	2022-03-24 13:10:09.000000000 +0000
@@ -98,7 +98,7 @@
             $env:PATH_INFO = "/wmts/1.0.0/global/default/GoogleMapsCompatible/0/0/0.jpg"
             $env:QUERY_STRING = ""
             Start-Process -FilePath ".\mapcache.fcgi.exe" -RedirectStandardOutput "${{github.workspace}}\fcgi.jpg" -NoNewWindow -Wait
-            perl.exe -0777 -pi -e 'binmode ARGV;binmode ARGVOUT;s/[A-Z][-:; ,\/=A-Za-z0-9]*\r\n//g;s/\r\n//' "${{github.workspace}}\fcgi.jpg"
+            perl.exe -0777 -pi -e 'binmode ARGV;binmode ARGVOUT;s/[A-Z][a-z][-:; ,\/=A-Za-z0-9\r\n]*//' "${{github.workspace}}\fcgi.jpg"
             $match = (.\gdal\apps\gdalinfo.exe -checksum "${{github.workspace}}\fcgi.jpg" | Select-String -CaseSensitive -Pattern "Checksum=21336" -Quiet)
             if ( $match ) {
               "Success"
diff -Nru mapcache-1.12.0/lib/source_gdal.c mapcache-1.12.1/lib/source_gdal.c
--- mapcache-1.12.0/lib/source_gdal.c	2022-01-27 19:52:39.000000000 +0000
+++ mapcache-1.12.1/lib/source_gdal.c	2022-03-24 13:10:09.000000000 +0000
@@ -465,6 +465,11 @@
     return hDstDS;
 }
 
+#define PREMULTIPLY(out,color,alpha)\
+{\
+  int temp = ((alpha) * (color)) + 0x80;\
+  out =((temp + (temp >> 8)) >> 8);\
+}
 
 /**
  * \private \memberof mapcache_source_gdal
@@ -478,6 +483,9 @@
   GDALDatasetH hTmpDS = NULL;
   mapcache_buffer *data;
   unsigned char *rasterdata;
+  unsigned char* rowptr;
+  unsigned char** row_pointers;
+  int i, j;
   CPLErr eErr;
   mapcache_pooled_connection *pc = NULL;
   int bands_bgra[] = { 3, 2, 1, 4 }; /* mapcache buffer order is BGRA */
@@ -587,9 +595,41 @@
   map->raw_image->w = map->width;
   map->raw_image->h = map->height;
   map->raw_image->stride = map->width * 4;
-  map->raw_image->data = rasterdata;
   map->raw_image->has_alpha = MC_ALPHA_UNKNOWN;
 
+  // Handling of premulitiplication for GDAL sources.
+  // Since the data is already in BGRA order, there is no need to swap the bytes around.
+
+  row_pointers = malloc(map->raw_image->h * sizeof(unsigned char*));
+  apr_pool_cleanup_register(ctx->pool, row_pointers, (void*)free, apr_pool_cleanup_null);
+
+  rowptr = rasterdata;
+  for(i = 0; i < map->raw_image->h; i++) {
+    row_pointers[i] = rowptr;
+    rowptr += map->raw_image->stride;
+  }
+  
+  for(i = 0; i < map->raw_image->h; i++) {
+    unsigned char pixel[4];
+    unsigned char alpha;
+    unsigned char* pixptr = row_pointers[i];
+    for(j = 0; j < map->raw_image->w; j++) {
+      memcpy(pixel, pixptr, sizeof(unsigned int));
+      alpha = pixel[3];
+      if(alpha == 0) {
+        pixptr[0] = 0;
+        pixptr[1] = 0;
+        pixptr[2] = 0;
+      } else if (alpha < 255) {
+        PREMULTIPLY(pixptr[0], pixel[0], alpha);
+        PREMULTIPLY(pixptr[1], pixel[1], alpha);
+        PREMULTIPLY(pixptr[2], pixel[2], alpha);
+      }
+      pixptr += 4;
+    }
+  }
+
+  map->raw_image->data = rasterdata;
   GDALClose( hDstDS ); /* close first this one, as it references hTmpDS or hSrcDS */
   if( hTmpDS )
     GDALClose(hTmpDS); /* references hSrcDS, so close before */