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#!/usr/bin/perl -w
#
# gen-gdkglwglext-c.pl
#
# Script for generating gdk/win32/gdkglwglext.c from SGI's OpenGL extension
# header.
#
# written by Naofumi Yasufuku <naofumi@users.sourceforge.net>
#
@input_headers = ("wglext.h", "wglext-extra.h");
#---------------
open(IN, "common-header.h") || die "cannot open common-header.h";
print while (<IN>);
close(IN);
print <<EOF;
/*
* This is a generated file. Please modify "gen-gdkglwglext-c.pl".
*/
#include "gdkglwin32.h"
#include "gdkglprivate-win32.h"
#include "gdkglwglext.h"
EOF
#---------------
foreach $in (@input_headers) {
open(IN, $in) || die "cannot open $in";
while (<IN>) {
if (/#ifndef\s+WGL_[a-zA-Z0-9]+_[a-z0-9_]+/) {
@line = split;
$_ = <IN>;
if (/#define\s+$line[1]/) {
while (<IN>) {
if (/#ifdef\s+WGL_WGLEXT_PROTOTYPES/) {
$extension = $line[1];
# function prototypes
@functions = ();
while (<IN>) {
last if (/#endif/);
($func) = /(wgl\w+)/;
push(@functions, $func);
}
# typedefs
@typedefs = ();
while (<IN>) {
last if (/#endif/);
chomp;
push(@typedefs, $_);
}
generate_code();
last;
} elsif (/#endif/) {
last;
}
}
}
}
}
close(IN);
}
# code generator
sub generate_code {
print "/*\n";
print " * $extension\n";
print " */\n\n";
print "static GdkGL_$extension _procs_$extension = {\n";
print " (GdkGLProc_$functions[0]) -1";
for ($i = 1; $i <= $#functions; $i++) {
print ",\n (GdkGLProc_$functions[$i]) -1";
}
print "\n};\n\n";
foreach $func (@functions) {
print "/* $func */\n";
print "GdkGLProc\n";
print "gdk_gl_get_$func (void)\n";
print "{\n";
print " if (wglGetCurrentContext () == NULL)\n";
print " return NULL;\n";
print "\n";
print " if (_procs_$extension.$func == (GdkGLProc_$func) -1)\n";
print " _procs_$extension.$func =\n";
print " (GdkGLProc_$func) gdk_gl_get_proc_address (\"$func\");\n";
print "\n";
print " GDK_GL_NOTE (MISC,\n";
print " g_message (\" - gdk_gl_get_$func () - \%s\",\n";
print " (_procs_$extension.$func) ? \"supported\" : \"not supported\"));\n";
print "\n";
print " return (GdkGLProc) (_procs_$extension.$func);\n";
print "}\n\n";
}
print "/* Get $extension functions */\n";
print "GdkGL_$extension *\n";
print "gdk_gl_get_$extension (GdkGLConfig *glconfig)\n";
print "{\n";
print " static gint supported = -1;\n";
print "\n";
print " if (wglGetCurrentContext () == NULL)\n";
print " return NULL;\n";
print "\n";
print " if (supported == -1)\n";
print " {\n";
print " supported = gdk_win32_gl_query_wgl_extension (glconfig, \"$extension\");\n";
print "\n";
print " if (supported)\n";
print " {\n";
foreach $func (@functions) {
print " supported &= (gdk_gl_get_$func () != NULL);\n";
}
print " }\n";
print " }\n";
print "\n";
print " GDK_GL_NOTE (MISC,\n";
print " g_message (\" - gdk_gl_get_$extension () - \%s\",\n";
print " (supported) ? \"supported\" : \"not supported\"));\n";
print "\n";
print " if (!supported)\n";
print " return NULL;\n";
print "\n";
print " return &_procs_$extension;\n";
print "}\n\n";
}
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