Rewrite the Makefile to have proper dependencies and stuff

[gldbg.git] / source / glwrap_funcs.c

diff --git a/source/glwrap_funcs.c b/source/glwrap_funcs.c
new file mode 100644 (file)
index 0000000..e7676f6
--- /dev/null
+++ b/source/glwrap_funcs.c
@@ -0,0 +1,113 @@
+/* $Id$
+
+This file is part of gldbg
+Copyright © 2010  Mikko Rasa, Mikkosoft Productions
+Distributed under the GPL
+*/
+
+#include <dlfcn.h>
+#include <X11/Xlib.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include "arraysize.h"
+#include "functions.h"
+#include "glwrap.h"
+
+int in_begin_block = 0;
+GLenum cur_error = GL_NO_ERROR;
+
+static void check_error()
+{
+       GLenum (*orig_glGetError)() = 0;
+       GLenum code;
+
+       if(in_begin_block)
+               return;
+
+       if(!orig_glGetError)
+               orig_glGetError = glsym("glGetError");
+
+       code = orig_glGetError();
+       if(code!=GL_NO_ERROR)
+       {
+               begin_packet(FUNC_GLDERROR);
+               write_int(code);
+               send_packet();
+
+               if(cur_error==GL_NO_ERROR)
+                       cur_error = code;
+       }
+}
+
+void APIENTRY glBegin(GLenum mode)
+{
+       static void (*orig)(GLenum);
+       if(!orig)
+               orig = glsym("glBegin");
+       orig(mode);
+
+       begin_packet(FUNC_GLBEGIN);
+       write_int(mode);
+       send_packet();
+
+       in_begin_block = 1;
+}
+
+void APIENTRY glEnd()
+{
+       static void (*orig)();
+       if(!orig)
+               orig = glsym("glEnd");
+       orig();
+
+       begin_packet(FUNC_GLEND);
+       send_packet();
+
+       in_begin_block = 0;
+       check_error();
+}
+
+GLenum APIENTRY glGetError()
+{
+       GLenum ret = GL_NO_ERROR;
+
+       if(in_begin_block)
+       {
+               if(cur_error==GL_NO_ERROR)
+                       cur_error = GL_INVALID_OPERATION;
+       }
+       else
+       {
+               ret = cur_error;
+               cur_error = GL_NO_ERROR;
+       }
+
+       begin_packet(FUNC_GLGETERROR);
+       write_int(ret);
+       send_packet();
+
+       return ret;
+}
+
+void (*glXGetProcAddress(const GLubyte *procname))(void)
+{
+       void *handle = 0;
+       void (*ret)() = 0;
+
+       if(glsym((const char *)procname))
+       {
+               handle = dlopen(NULL, RTLD_LAZY);
+               ret = dlsym(handle, (const char *)procname);
+       }
+
+       begin_packet(FUNC_GLXGETPROCADDRESS);
+       write_pointer(ret);
+       write_string((const char *)procname);
+       send_packet();
+
+       return ret;
+}
+
+void (*glXGetProcAddressARB(const GLubyte *))(void) __attribute__((alias("glXGetProcAddress")));
+
+#include "gensrc/glwrap.funcs"