f37738453e
This adds a CoglObject called CoglSnippet which will be used to store
strings used as GLSL snippets to be attached at hook points to a
CoglPipeline. The snippets can currently contain three strings:
declarations - This will be placed in the global scope and is intended
to be used to declare uniforms, attributes and
functions.
pre - This will be inserted before the hook point.
post - This will be inserted after the hook point.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
146 lines
3.2 KiB
C
146 lines
3.2 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2011 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-snippet-private.h"
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#include "cogl-util.h"
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static void
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_cogl_snippet_free (CoglSnippet *snippet);
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COGL_OBJECT_DEFINE (Snippet, snippet);
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CoglSnippet *
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cogl_snippet_new (const char *declarations,
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const char *post)
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{
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CoglSnippet *snippet = g_slice_new0 (CoglSnippet);
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_cogl_snippet_object_new (snippet);
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cogl_snippet_set_declarations (snippet, declarations);
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cogl_snippet_set_post (snippet, post);
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return snippet;
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}
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static gboolean
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_cogl_snippet_modify (CoglSnippet *snippet)
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{
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if (snippet->immutable)
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{
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g_warning ("A CoglSnippet should not be modified once it has been "
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"attached to a pipeline. Any modifications after that point "
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"will be ignored.");
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return FALSE;
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}
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return TRUE;
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}
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void
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cogl_snippet_set_declarations (CoglSnippet *snippet,
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const char *declarations)
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{
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_COGL_RETURN_IF_FAIL (cogl_is_snippet (snippet));
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if (!_cogl_snippet_modify (snippet))
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return;
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g_free (snippet->declarations);
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snippet->declarations = declarations ? g_strdup (declarations) : NULL;
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}
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const char *
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cogl_snippet_get_declarations (CoglSnippet *snippet)
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{
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_COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), NULL);
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return snippet->declarations;
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}
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void
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cogl_snippet_set_pre (CoglSnippet *snippet,
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const char *pre)
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{
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_COGL_RETURN_IF_FAIL (cogl_is_snippet (snippet));
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if (!_cogl_snippet_modify (snippet))
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return;
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g_free (snippet->pre);
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snippet->pre = pre ? g_strdup (pre) : NULL;
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}
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const char *
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cogl_snippet_get_pre (CoglSnippet *snippet)
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{
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_COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), NULL);
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return snippet->pre;
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}
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void
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cogl_snippet_set_post (CoglSnippet *snippet,
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const char *post)
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{
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_COGL_RETURN_IF_FAIL (cogl_is_snippet (snippet));
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if (!_cogl_snippet_modify (snippet))
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return;
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g_free (snippet->post);
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snippet->post = post ? g_strdup (post) : NULL;
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}
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const char *
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cogl_snippet_get_post (CoglSnippet *snippet)
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{
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_COGL_RETURN_VAL_IF_FAIL (cogl_is_snippet (snippet), NULL);
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return snippet->post;
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}
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void
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_cogl_snippet_make_immutable (CoglSnippet *snippet)
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{
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snippet->immutable = TRUE;
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}
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static void
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_cogl_snippet_free (CoglSnippet *snippet)
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{
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g_free (snippet->declarations);
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g_free (snippet->pre);
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g_free (snippet->post);
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g_slice_free (CoglSnippet, snippet);
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}
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