Fix for libpng-1.4.

diff --git a/synfig-core/src/modules/mod_png/mptr_png.cpp b/synfig-core/src/modules/mod_png/mptr_png.cpp
index ec601b5..d85a59f 100644 (file)
--- a/synfig-core/src/modules/mod_png/mptr_png.cpp
+++ b/synfig-core/src/modules/mod_png/mptr_png.cpp
@@ -309,7 +309,11 @@ png_mptr::png_mptr(const char *file_name)
                                float b=gamma().b_U8_to_F32((unsigned char)png_ptr->palette[row_pointers[y][x]].blue);
                                float a=1.0;
                                if(info_ptr->valid & PNG_INFO_tRNS)
+#if (PNG_LIBPNG_VER_MAJOR > 1) || ((PNG_LIBPNG_VER_MAJOR == 1) && (PNG_LIBPNG_VER_MINOR >= 4))
+                                   a = (float)(unsigned char)png_ptr->trans_alpha[row_pointers[y][x]]*(1.0/255.0);
+#else
                                    a = (float)(unsigned char)png_ptr->trans[row_pointers[y][x]]*(1.0/255.0);
+#endif
                                surface_buffer[y][x]=Color(
                                        r,
                                        g,