mutter/cogl/cogl-snippet.c

/*
 * Cogl
 *
 * An object oriented GL/GLES Abstraction/Utility Layer
 *
 * Copyright (C) 2011 Intel Corporation.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see
 * <http://www.gnu.org/licenses/>.
 *
 *
 *
 * Authors:
 *   Neil Roberts <neil@linux.intel.com>
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "cogl-types.h"
#include "cogl-snippet-private.h"
#include "cogl-util.h"

static void
_cogl_snippet_free (CoglSnippet *snippet);

COGL_OBJECT_DEFINE (Snippet, snippet);

CoglSnippet *
cogl_snippet_new (CoglSnippetHook hook,
                  const char *declarations,
                  const char *post)
{
  CoglSnippet *snippet = g_slice_new0 (CoglSnippet);

  _cogl_snippet_object_new (snippet);

  snippet->hook = hook;

  cogl_snippet_set_declarations (snippet, declarations);
  cogl_snippet_set_post (snippet, post);

  return snippet;
}

CoglSnippetHook
cogl_snippet_get_hook (CoglSnippet *snippet)
{
  _COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), 0);

  return snippet->hook;
}

static CoglBool
_cogl_snippet_modify (CoglSnippet *snippet)
{
  if (snippet->immutable)
    {
      g_warning ("A CoglSnippet should not be modified once it has been "
                 "attached to a pipeline. Any modifications after that point "
                 "will be ignored.");

      return FALSE;
    }

  return TRUE;
}

void
cogl_snippet_set_declarations (CoglSnippet *snippet,
                               const char *declarations)
{
  _COGL_RETURN_IF_FAIL (cogl_is_snippet (snippet));

  if (!_cogl_snippet_modify (snippet))
    return;

  g_free (snippet->declarations);
  snippet->declarations = declarations ? g_strdup (declarations) : NULL;
}

const char *
cogl_snippet_get_declarations (CoglSnippet *snippet)
{
  _COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), NULL);

  return snippet->declarations;
}

void
cogl_snippet_set_pre (CoglSnippet *snippet,
                      const char *pre)
{
  _COGL_RETURN_IF_FAIL (cogl_is_snippet (snippet));

  if (!_cogl_snippet_modify (snippet))
    return;

  g_free (snippet->pre);
  snippet->pre = pre ? g_strdup (pre) : NULL;
}

const char *
cogl_snippet_get_pre (CoglSnippet *snippet)
{
  _COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), NULL);

  return snippet->pre;
}

void
cogl_snippet_set_replace (CoglSnippet *snippet,
                          const char *replace)
{
  _COGL_RETURN_IF_FAIL (cogl_is_snippet (snippet));

  if (!_cogl_snippet_modify (snippet))
    return;

  g_free (snippet->replace);
  snippet->replace = replace ? g_strdup (replace) : NULL;
}

const char *
cogl_snippet_get_replace (CoglSnippet *snippet)
{
  _COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), NULL);

  return snippet->replace;
}

void
cogl_snippet_set_post (CoglSnippet *snippet,
                       const char *post)
{
  _COGL_RETURN_IF_FAIL (cogl_is_snippet (snippet));

  if (!_cogl_snippet_modify (snippet))
    return;

  g_free (snippet->post);
  snippet->post = post ? g_strdup (post) : NULL;
}

const char *
cogl_snippet_get_post (CoglSnippet *snippet)
{
  _COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), NULL);

  return snippet->post;
}

void
_cogl_snippet_make_immutable (CoglSnippet *snippet)
{
  snippet->immutable = TRUE;
}

static void
_cogl_snippet_free (CoglSnippet *snippet)
{
  g_free (snippet->declarations);
  g_free (snippet->pre);
  g_free (snippet->replace);
  g_free (snippet->post);
  g_slice_free (CoglSnippet, snippet);
}