glapi: split the no-op dispatch code into new glapi_nop.c file

This unclutters the glapi.c file a bit.

1 files changed, 119 insertions, 0 deletions

diff --git a/src/mesa/glapi/glapi_nop.c b/src/mesa/glapi/glapi_nop.c
new file mode 100644
index 00000000000..a0d4b65f55f
--- /dev/null
+++ b/src/mesa/glapi/glapi_nop.c
@@ -0,0 +1,119 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.8
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2010  VMWare, Inc.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * No-op dispatch table.
+ *
+ * This file defines a special dispatch table which is loaded with no-op
+ * functions.
+ *
+ * When there's no current rendering context, calling a GL function like
+ * glBegin() is a no-op.  Apps should never normally do this.  So as a
+ * debugging aid, each of the no-op functions will emit a warning to
+ * stderr if the MESA_DEBUG or LIBGL_DEBUG env var is set.
+ */
+
+
+
+#include "main/compiler.h"
+#include "glapi/glapi.h"
+
+
+static GLboolean WarnFlag = GL_FALSE;
+static _glapi_warning_func warning_func;
+
+/*
+ * Enable/disable printing of warning messages.
+ */
+PUBLIC void
+_glapi_noop_enable_warnings(GLboolean enable)
+{
+  WarnFlag = enable;
+}
+
+/*
+ * Register a callback function for reporting errors.
+ */
+PUBLIC void
+_glapi_set_warning_func( _glapi_warning_func func )
+{
+  warning_func = func;
+}
+
+
+static int
+warn(const char *func)
+{
+#if !defined(_WIN32_WCE)
+   if ((WarnFlag || getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG"))
+       && warning_func) {
+     warning_func(NULL, "GL User Error: called without context: %s", func);
+   }
+#endif
+  return 0;
+}
+
+#ifdef DEBUG
+
+#define KEYWORD1 static
+#define KEYWORD1_ALT static
+#define KEYWORD2 GLAPIENTRY
+#define NAME(func)  NoOp##func
+#define F NULL
+
+#define DISPATCH(func, args, msg)					      \
+  warn(#func);
+
+#define RETURN_DISPATCH(func, args, msg)				      \
+  warn(#func); return 0
+
+#define TABLE_ENTRY(name) (_glapi_proc) NoOp##name
+
+#else
+
+static void
+NoOpGeneric(void)
+{
+   if ((WarnFlag || getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG"))
+      && warning_func) {
+      warning_func(NULL, "GL User Error: calling GL function");
+   }
+}
+
+
+#define TABLE_ENTRY(name) (_glapi_proc) NoOpGeneric
+
+#endif
+
+#define DISPATCH_TABLE_NAME __glapi_noop_table
+#define UNUSED_TABLE_NAME __unused_noop_functions
+
+static int NoOpUnused(void)
+{
+   return warn("extension function");
+}
+
+#include "glapi/glapitemp.h"