gEDA: gd instead of libgdeda

[Wojciech Kazubski <wk@xxxxxxxxxxxxx>]

Hello!

Some linux distributions (as Fedora Core) do have gd library already 
available. GD is also needed to build new version of pcb with gtk frontend. 
The only differece between gd and libgdgeda is the direction of 
drawing arcs. Libgeda can be modified to use original gd instead of libgdgeda 
This requires changing only one line of C source and some modifications to 
configure files.

Patch appended.

Wojciech Kazubski

--- libgeda-20060123/src/o_arc_basic.c.gd	2006-01-24 04:20:50.000000000 +0100
+++ libgeda-20060123/src/o_arc_basic.c	2006-04-22 21:55:13.000000000 +0200
@@ -1286,7 +1286,7 @@
 						o_current->line_width));
 
   gdImageArc(current_im_ptr,
-	     x, y, width, height, start_angle, end_angle, color);
+	     x, y, width, height, 720 - end_angle, 720 - start_angle, color);
 #endif
 
 }
--- libgeda-20060123/configure.ac.gd	2006-01-22 14:57:05.000000000 +0100
+++ libgeda-20060123/configure.ac	2006-04-22 22:13:32.000000000 +0200
@@ -21,8 +21,8 @@
 #########################################################################
 # Command line flags start
 # 
-# --disable-gdgeda : turn off libgdgeda support
-AC_ARG_ENABLE(gdgeda, [  --disable-gdgeda        Disable libgdgeda support (don't use libgdgeda at all)], 
+# --disable-gdgeda : turn off gd support
+AC_ARG_ENABLE(gdgeda, [  --disable-gdgeda        Disable gd support (don't use gd at all)], 
   [ if test $enableval = "no"; then no_gdgeda=yes; fi ])
 
 # Change default location for rc files
@@ -146,9 +146,9 @@
 ############################################################################
 
 ############################################################################
-# Check for libgdgeda start
+# Check for gd start
 # 
-AC_PATH_PROG(LIBGDGEDACONFIG, libgdgeda-config, no, ${PATH})
+AC_PATH_PROG(LIBGDGEDACONFIG, gdlib-config, no, ${PATH})
 
 if test "$LIBGDGEDACONFIG" = "no"
 then
@@ -159,7 +159,7 @@
 else
    if test "$no_gdgeda" = "yes" 
    then
-     echo found libgdgeda, but disabling gdgeda support.
+     echo found gd, but disabling gd support.
      GDGEDA_CFLAGS=
      GDGEDA_LIBS=
      GDGEDA_VERSION=
@@ -174,13 +174,13 @@
 
      # This is not really used to figure out paths, but just to make 
      # sure >= 2.0.15 is installed
-     PKG_CHECK_MODULES(libgdgeda, libgdgeda >= 2.0.15)
-     AC_DEFINE(HAS_LIBGDGEDA, 1, [If libgdgeda has been installed, define this])
+     # PKG_CHECK_MODULES(gd, gd >= 2.0.15)
+     AC_DEFINE(HAS_LIBGDGEDA, 1, [If gd has been installed, define this])
    fi
 fi
 
 # 
-# Check for libgdgeda end
+# Check for gd end
 ############################################################################
 
 ############################################################################
@@ -628,7 +628,7 @@
    GLIB library version:             $GLIB_VERSION
    GTK+ library version:             $GTK_VERSION
    GUILE library version:            $GUILE_VERSION
-   libgdgeda (png output):           $GDGEDA $GDGEDA_VERSION
+   gd (png output):           	     $GDGEDA $GDGEDA_VERSION
    mingw build:                      $MINGW
    data directory:                   $expandedGEDADATADIR
    rc directory:                     $expandedGEDARCDIR