Enable and fix gdk module with MSVC

Author: jlskuz

CMakePresets.json

@@ -13,7 +13,7 @@
                 "MOD_AVFORMAT": "ON",
                 "MOD_DECKLINK": "OFF",
                 "MOD_FREI0R": "OFF",
-                "MOD_GDK": "OFF",
+                "MOD_GDK": "ON",
                 "MOD_JACKRACK": "OFF",
                 "USE_LV2": "OFF",
                 "USE_VST2": "OFF",

src/modules/gdk/CMakeLists.txt

@@ -16,7 +16,9 @@ target_compile_options(mltgdk PRIVATE ${MLT_COMPILE_OPTIONS})
 target_include_directories(mltgdk PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
 
 target_link_libraries(mltgdk PRIVATE mlt Threads::Threads PkgConfig::GdkPixbuf)
-if(NOT MSVC)
+if(MSVC)
+  target_link_libraries(mltgdk PRIVATE PThreads4W::PThreads4W)
+else()
   target_link_libraries(mltgdk PRIVATE m)
 endif()
 

src/modules/gdk/producer_pixbuf.c

@@ -37,7 +37,19 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
+
+#ifndef ssize_t
+#ifdef _WIN32
+#include <BaseTsd.h>
+#define ssize_t SSIZE_T
+#else
+#define ssize_t ptrdiff_t
+#endif
+#endif
 
 // this protects concurrent access to gdk_pixbuf
 static pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;

vcpkg.json

@@ -12,6 +12,7 @@
     "qtbase",
     "qtsvg",
     "libxml2",
-    "libebur128"
+    "libebur128",
+    "gdk-pixbuf"
   ]
 }