Apply 2198806: add support for alpha in paletted PNG files in the PNG importer. Patch...

[synfig.git] / synfig-core / trunk / src / modules / mod_png / mptr_png.cpp

diff --git a/synfig-core/trunk/src/modules/mod_png/mptr_png.cpp b/synfig-core/trunk/src/modules/mod_png/mptr_png.cpp
index a0b021a..f0fcb86 100644 (file)
--- a/synfig-core/trunk/src/modules/mod_png/mptr_png.cpp
+++ b/synfig-core/trunk/src/modules/mod_png/mptr_png.cpp
@@ -309,11 +309,14 @@ png_mptr::png_mptr(const char *file_name)
                                float r=gamma().r_U8_to_F32((unsigned char)png_ptr->palette[row_pointers[y][x]].red);
                                float g=gamma().g_U8_to_F32((unsigned char)png_ptr->palette[row_pointers[y][x]].green);
                                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)
+                                   a = (float)(unsigned char)png_ptr->trans[row_pointers[y][x]]*(1.0/255.0);
                                surface_buffer[y][x]=Color(
                                        r,
                                        g,
                                        b,
-                                       1.0
+                                       a
                                );
                        }
                break;