Updated configure script to test for an external PNG library, and if

not found fall back to using the internal version (for Linux, and all
systems that use the configure script).

The debugger can now be resized in between ROM launches (ie, before
a ROM is actually started).  Previously, the entire program had to
be restarted for resizing to take effect.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@2045 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba

configure

@@ -15,6 +15,7 @@ CXXFLAGS="$CXXFLAGS $CPPFLAGS"
 
 # default lib behaviour yes/no/auto
 _opengl=auto
+_libpng=auto
 _zlib=auto
 
 # default option behaviour yes/no
@@ -199,6 +200,7 @@ Optional Features:
 
 Optional Libraries:
   --with-sdl-prefix=DIR    Prefix where the sdl-config script is installed (optional)
+  --with-libpng-prefix=DIR Prefix where libpng is installed (optional)
   --with-zlib-prefix=DIR   Prefix where zlib is installed (optional)
   --x-libraries            Path to X11 libraries [${X_LIBS}]
 
@@ -238,6 +240,11 @@ for ac_option in $@; do
         arg=`echo $ac_option | cut -d '=' -f 2`
         _sdlpath="$arg:$arg/bin"
         ;;
+      --with-libpng-prefix=*)
+        _prefix=`echo $ac_option | cut -d '=' -f 2`
+        LIBPNG_CFLAGS="-I$_prefix/include"
+        LIBPNG_LIBS="-L$_prefix/lib"
+        ;;
       --with-zlib-prefix=*)
         _prefix=`echo $ac_option | cut -d '=' -f 2`
         ZLIB_CFLAGS="-I$_prefix/include"
@@ -497,6 +504,25 @@ if test -n "$_host_prefix"; then
 	_windres="$_host_prefix-$_windres"
 fi
 
+#
+# Check for libpng
+#
+echocheck "libpng"
+if test "$_libpng" = auto ; then
+	_libpng=no
+	cat > $TMPC << EOF
+#include <stdio.h>
+#include <png.h>
+int main(void) { return printf("%s\n", PNG_HEADER_VERSION_STRING); }
+EOF
+	cc_check $LDFLAGS $CXXFLAGS $LIBPNG_CFLAGS $LIBPNG_LIBS -lpng && _libpng=yes
+fi
+if test "$_libpng" = yes ; then
+	echo "$_libpng"
+else
+	echo "none found, using built-in version"
+fi
+
 #
 # Check for ZLib
 #
@@ -636,6 +662,7 @@ DBG="$SRC/debugger"
 DBGGUI="$SRC/debugger/gui"
 YACC="$SRC/yacc"
 CHEAT="$SRC/cheat"
+LIBPNG="$SRC/libpng"
 ZLIB="$SRC/zlib"
 
 INCLUDES="-I$CORE -I$COMMON -I$GUI"
@@ -678,6 +705,13 @@ case $_host_os in
 			;;
 esac
 
+if test "$_libpng" = yes ; then
+  LIBS="$LIBS -lpng"
+else
+	MODULES="$MODULES $LIBPNG"
+	INCLUDES="$INCLUDES -I$LIBPNG"
+fi
+
 if test "$_zlib" = yes ; then
   LIBS="$LIBS -lz"
 else

src/common/module.mk

@@ -6,6 +6,7 @@ MODULE_OBJS := \
 	src/common/SoundSDL.o \
 	src/common/FrameBufferSoft.o \
 	src/common/FrameBufferGL.o \
+	src/common/PNGLibrary.o \
 	src/common/RectList.o \
 	src/common/Snapshot.o
 

src/debugger/Debugger.cxx

@@ -127,15 +127,6 @@ Debugger::Debugger(OSystem* osystem)
     myHeight(620),
     myRewindManager(NULL)
 {
-  // Get the dialog size
-  int w, h;
-  myOSystem->settings().getSize("debuggerres", w, h);
-  myWidth = BSPF_max(w, 0);
-  myHeight = BSPF_max(h, 0);
-  myWidth = BSPF_max(myWidth, 1050u);
-  myHeight = BSPF_max(myHeight, 620u);
-  myOSystem->settings().setSize("debuggerres", myWidth, myHeight);
-
   // Init parser
   myParser = new DebuggerParser(this);
   myBreakPoints = new PackedBitArray(0x10000);
@@ -169,6 +160,15 @@ Debugger::~Debugger()
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void Debugger::initialize()
 {
+  // Get the dialog size
+  int w, h;
+  myOSystem->settings().getSize("debuggerres", w, h);
+  myWidth = BSPF_max(w, 0);
+  myHeight = BSPF_max(h, 0);
+  myWidth = BSPF_max(myWidth, 1050u);
+  myHeight = BSPF_max(myHeight, 620u);
+  myOSystem->settings().setSize("debuggerres", myWidth, myHeight);
+
   const GUI::Rect& r = getDialogBounds();
 
   delete myBaseDialog;

src/gui/UIDialog.cxx

@@ -168,10 +168,9 @@ UIDialog::UIDialog(OSystem* osystem, DialogContainer* parent,
 
   // Add message concerning usage
   xpos = vBorder; ypos += 2*(lineHeight + 4);
-  lwidth = font.getStringWidth("(*) Changes require application restart");
+  lwidth = font.getStringWidth("(*) Changes require ROM reload");
   new StaticTextWidget(myTab, font, xpos, ypos, lwidth, fontHeight,
-                       "(*) Changes require application restart",
-                       kTextAlignLeft);
+                       "(*) Changes require ROM reload", kTextAlignLeft);
 
   // Add items for tab 1
   addToFocusList(wid, tabID);