[Mono-devel-list] Getting Tao.OpenGl building with Mono and GTK# with gtkglext-sharp

[Jackson Harper]

The ilasm and monodis patches have been in CVS for a couple of days :-).

Jackson


On Wed, 2004-07-07 at 18:18, Steven Brown wrote:
> Hello, I've been poking on the Tao framework in Mono's CVS trying to get 
> it to build with only Mono instead of depending on Microsoft's tools, 
> and running in Linux with GTK#.  Almost everything works with a couple 
> patches to Tao and Mono, and I can successfully do OpenGL with GTK#. 
> Patches are included here and I'll give some instructions below.  I'm 
> not sure who's the contact now for Tao since it moved into Mono's CVS; 
> should discussion go to mono-devel, the GTK# list, or ..?
> 
> 
> First you need to patch Tao's PostProcess project so it can read monodis 
> -generated il code as well as ildasm il.  The attached patch 
> 'tao-monodis-regex-swb.patch' does this.  (Tao's PostProcess 
> disassembles Tao dlls, does a regex to replace some il code in the 
> IlasmAttribute and a couple other changes, and reassembles the dll.  See 
> their FAQ).
> 
> To build the Tao.OpenGl project, compile the pre-processed dll:
> 
> mcs /d:LINUX /clscheck- /unsafe /t:library /out:Tao.OpenGl.dll *.cs
> 
> Build the PostProcessor:
> 
> mcs /t:exe /out:Tao.PostProcess.exe *.cs
> 
> Disassemble the pre-processed dll:
> 
> monodis Tao.OpenGl.dll --output=Tao.OpenGl.il
> 
> Run the PostProcessor:
> 
> mono PostProcess.exe Tao.OpenGl.il Tao.OpenGl.pp.il /R /Y
> 
> Re-assemble the post-processed il.  You will need the attached patches 
> 'mcs-ilasm-NumberHelper-float.swb.patch' and 
> 'mono-monodis-typing-swb.patch', as Mono's ilasm doesn't recognize 
> floats like "1e+150", and monodis forgets to wrap it in a float64() 
> cast.  There is still one bug left (but it's being looked at by jackson) 
> that prevents Mono's ilasm from finishing this step, so you'll need to 
> run it with Microsoft's ilasm for now:
> 
> ilasm /dll /output:Tao.OpenGl.dll Tao.OpenGl.pp.il
> 
> 
> You can then use the resulting Tao.OpenGl.dll with gtkglext-sharp and 
> GTK# to get OpenGL in GTK#.  Nifty. :)  Almost completely independent of 
> Microsoft tools, now.  If you use gtkglext-sharp, you'll also need the 
> two attached .config files to tell it what libraries to use on Linux.
> 
> 
> I'll add these patches to bugzilla if it looks like they'll fall off the 
> list.  These instructions should also really be CVSed into a README in 
> the Tao module until it gets autoconfed.  What I'd like to see is the 
> GTK# project absorb gtkglext-sharp as one of the optional dlls it 
> builds, as I think its extension of GTK widgets to support OpenGL is a 
> big win for GTK#, and it would prevent gtkglext-sharp from being lost to 
> bitrot.  I'll probably need to ask the GTK# list about that, but what do 
> y'all think about that idea?  It was the best solution to OpenGL with 
> GTK# I could find.
> 
> 
> ______________________________________________________________________
> Change the regex that matches ends of attributes, as Mono fully qualifies the
> names.  E.g.:
> 
> MS: // end of class DelegateCallingConventionCdeclAttribute
> Mono: // end of class Tao.OpenGl.DelegateCallingConventionCdeclAttribute
> 
> Change the regex that cuts the body of the IlasmAttribute to be compatible with
> monodis-genereated il.  Checks for a line with no starting hex rather than
> expecting 'Code size' which should be a tad more generic.
> 
> This will fix PostProcess.exe spinning on monodis generated il.  It should
> remain compatible with Microsoft ildasm generated il.
> 
> - Steven Brown <swbrown at ucsd.edu>
> 
> 
> Index: Framework/Projects/Tao.PostProcess/ReleaseBuildProcessor.cs
> ===================================================================
> RCS file: /mono/tao/Framework/Projects/Tao.PostProcess/ReleaseBuildProcessor.cs,v
> retrieving revision 1.2
> diff -u -r1.2 ReleaseBuildProcessor.cs
> --- Framework/Projects/Tao.PostProcess/ReleaseBuildProcessor.cs	6 Jun 2004 19:51:38 -0000	1.2
> +++ Framework/Projects/Tao.PostProcess/ReleaseBuildProcessor.cs	30 Jun 2004 05:11:48 -0000
> @@ -112,7 +112,7 @@
>          private string ModifyIlasmCalls(string fileContent) {
>              int callStartPosition = -1;
>              int callEndPosition = -1;
> -            Regex callStart = new Regex(@"((?<Method> \.custom instance void Tao\..*?\.IlasmAttribute::\.ctor\(string\) = \((?<Body> .*?) \/\/ Code size .*? )} \/\/ end of)", RegexOptions.Compiled | RegexOptions.Singleline);
> +            Regex callStart = new Regex(@"((?<Method> \.custom instance void (class )?Tao\..*?\.IlasmAttribute::\.ctor\(string\)\s*=\s*\((?<Body>.*?)(?<LineWithNoHex>\n\s*[^0-9A-Fa-f\s]).*?)}\s*\/\/ end of)", RegexOptions.Compiled | RegexOptions.Singleline);
>  
>              Match callStartMatch = callStart.Match(fileContent);
>              while(callStartMatch.Success) {
> @@ -235,7 +235,7 @@
>          /// </remarks>
>          protected override string InjectMsil(string fileContent) {
>              Regex attributeStart = new Regex(@"\.class .*? IlasmAttribute", RegexOptions.Compiled);
> -            Regex attributeEnd = new Regex(@"// end of class IlasmAttribute", RegexOptions.Compiled);
> +            Regex attributeEnd = new Regex(@"// end of class .*IlasmAttribute", RegexOptions.Compiled);
>              fileContent = RemoveAttribute(attributeStart, attributeEnd, fileContent);
>              fileContent = ModifyIlasmCalls(fileContent);
>  
> @@ -258,7 +258,7 @@
>          /// </remarks>
>          protected override string ModifyCdeclDelegates(string fileContent) {
>              Regex attributeStart = new Regex(@"\.class .*? DelegateCallingConventionCdeclAttribute", RegexOptions.Compiled);
> -            Regex attributeEnd = new Regex(@"// end of class DelegateCallingConventionCdeclAttribute", RegexOptions.Compiled);
> +            Regex attributeEnd = new Regex(@"// end of class .*DelegateCallingConventionCdeclAttribute", RegexOptions.Compiled);
>              fileContent = RemoveAttribute(attributeStart, attributeEnd, fileContent);
>              fileContent = ModifyCdeclDelegateCalls(fileContent);
>  
> 
> ______________________________________________________________________
> Literal float tokens as generated by monodis like "1e+150" fail to be parsed by
> ilasm as NumberHelper only checks for a '.' to consider a number a float.
> Quick hack fix of having it also check for an 'e' or 'E'.
> 
> - Steven Brown <swbrown at ucsd.edu>
> 
> 
> Index: ilasm/scanner/NumberHelper.cs
> ===================================================================
> RCS file: /mono/mcs/ilasm/scanner/NumberHelper.cs,v
> retrieving revision 1.8
> diff -u -r1.8 NumberHelper.cs
> --- ilasm/scanner/NumberHelper.cs	10 Jun 2004 21:01:19 -0000	1.8
> +++ ilasm/scanner/NumberHelper.cs	29 Jun 2004 06:00:00 -0000
> @@ -118,7 +118,7 @@
>                          }
>  
>                          try {
> -                                if (num.IndexOf ('.') != -1) {
> +                                if (num.IndexOf ('.') != -1 || num.IndexOf('e') != -1 || num.IndexOf('E') != -1) {
>                                          double d = Double.Parse (num, nstyles, NumberFormatInfo.InvariantInfo);
>                                          result.token = Token.FLOAT64;
>                                          result.val = d;
> 
> ______________________________________________________________________
> float64 cast for literals as done by ildasm was missing in monodis.  Might not
> matter, but makes the output similiar.
> 
> I assume the same is true for float32, so it was also changed.
> 
> - Steven Brown <swbrown at ucsd.edu>
> 
> 
> Index: mono/dis/get.c
> ===================================================================
> RCS file: /mono/mono/mono/dis/get.c,v
> retrieving revision 1.82
> diff -u -r1.82 get.c
> --- mono/dis/get.c	25 Jun 2004 18:54:50 -0000	1.82
> +++ mono/dis/get.c	29 Jun 2004 06:13:14 -0000
> @@ -1621,12 +1621,12 @@
>  	case MONO_TYPE_R4: {
>  		float r;
>  		readr4 (ptr, &r);
> -		return g_strdup_printf ("%g", (double) r);
> +		return g_strdup_printf ("float32(%g)", (double) r);
>  	}
>  	case MONO_TYPE_R8: {
>  		double r;
>  		readr8 (ptr, &r);
> -		return g_strdup_printf ("%g", r);
> +		return g_strdup_printf ("float64(%g)", r);
>  	}
>  	case MONO_TYPE_STRING: {
>  		int i, j, e;
> 
> ______________________________________________________________________
> <configuration>
>   <dllmap dll="libgtkglext-win32-1.0-0.dll" target="libgtkglext-x11-1.0.so.0"/>
>   <dllmap dll="libgdkglext-win32-1.0-0.dll" target="libgdkglext-x11-1.0.so.0"/>
> </configuration>
> 
> ______________________________________________________________________
> <configuration>
>   <dllmap dll="libgtkglext-win32-1.0-0.dll" target="libgtkglext-x11-1.0.so.0"/>
>   <dllmap dll="libgdkglext-win32-1.0-0.dll" target="libgdkglext-x11-1.0.so.0"/>
> </configuration>