image_png: libpng16 support (by graphitemaster)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@11952 d7cf8633-e32d-0410-b094-e92efae38249
::stable-branch::merge=15401d0a14c409b7dd75e88c603048c797fa2232

diff --git a/image_png.c b/image_png.c
index f8d50151b7e98a2f1e8d027528cd5564a42924a7..04419bd03551f29eca33ccb183ebca4f2437d787 100644 (file)
--- a/image_png.c
+++ b/image_png.c
@@ -145,16 +145,20 @@ qboolean PNG_OpenLibrary (void)
        const char* dllnames [] =
        {
 #if WIN32
+               "libpng16.dll",
+               "libpng16-16.dll",
                "libpng15-15.dll",
                "libpng15.dll",
                "libpng14-14.dll",
                "libpng14.dll",
                "libpng12.dll",
 #elif defined(MACOSX)
+               "libpng16.16.dylib",
                "libpng15.15.dylib",
                "libpng14.14.dylib",
                "libpng12.0.dylib",
 #else
+               "libpng16.so.16",
                "libpng15.so.15", // WTF libtool guidelines anyone?
                "libpng14.so.14", // WTF libtool guidelines anyone?
                "libpng12.so.0",
@@ -204,6 +208,7 @@ void PNG_CloseLibrary (void)
 #define PNG_LIBPNG_VER_STRING_12 "1.2.4"
 #define PNG_LIBPNG_VER_STRING_14 "1.4.0"
 #define PNG_LIBPNG_VER_STRING_15 "1.5.0"
+#define PNG_LIBPNG_VER_STRING_16 "1.6.0"
 
 #define PNG_COLOR_MASK_PALETTE    1
 #define PNG_COLOR_MASK_COLOR      2
@@ -286,9 +291,6 @@ static void PNG_warning_fn(void *png, const char *message)
        Con_Printf("PNG_LoadImage: warning: %s\n", message);
 }
 
-extern int     image_width;
-extern int     image_height;
-
 unsigned char *PNG_LoadImage_BGRA (const unsigned char *raw, int filesize, int *miplevel)
 {
        unsigned int c;
@@ -308,7 +310,8 @@ unsigned char *PNG_LoadImage_BGRA (const unsigned char *raw, int filesize, int *
        png = (void *)qpng_create_read_struct(
                (qpng_access_version_number() / 100 == 102) ? PNG_LIBPNG_VER_STRING_12 :
                (qpng_access_version_number() / 100 == 104) ? PNG_LIBPNG_VER_STRING_14 :
-               PNG_LIBPNG_VER_STRING_15, // nasty hack... whatever
+               (qpng_access_version_number() / 100 == 105) ? PNG_LIBPNG_VER_STRING_15 :
+               PNG_LIBPNG_VER_STRING_16, // nasty hack... whatever
                0, PNG_error_fn, PNG_warning_fn
        );
        if(!png)
@@ -489,7 +492,8 @@ qboolean PNG_SaveImage_preflipped (const char *filename, int width, int height,
        png = (void *)qpng_create_write_struct( 
                (qpng_access_version_number() / 100 == 102) ? PNG_LIBPNG_VER_STRING_12 :
                (qpng_access_version_number() / 100 == 104) ? PNG_LIBPNG_VER_STRING_14 :
-               PNG_LIBPNG_VER_STRING_15, // nasty hack... whatever
+               (qpng_access_version_number() / 100 == 105) ? PNG_LIBPNG_VER_STRING_15 :
+               PNG_LIBPNG_VER_STRING_16, // nasty hack... whatever
                0, PNG_error_fn, PNG_warning_fn
        );
        if(!png)