Add preliminary support for EXT_framebuffer_object

1 files changed, 74 insertions, 0 deletions

diff --git a/src/glitz_framebuffer.c b/src/glitz_framebuffer.c
new file mode 100644
index 0000000..24a214f
--- /dev/null
+++ b/src/glitz_framebuffer.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright © 2005 Novell, Inc.
+ * 
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Novell, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior permission.
+ * Novell, Inc. makes no representations about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ *
+ * NOVELL, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
+ * NO EVENT SHALL NOVELL, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, 
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: David Reveman <davidr@novell.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "../config.h"
+#endif
+
+#include "glitzint.h"
+
+void
+glitz_framebuffer_init (glitz_framebuffer_t *framebuffer)
+{
+    framebuffer->name = 0;
+}
+
+void 
+glitz_framebuffer_fini (glitz_gl_proc_address_list_t *gl,
+                        glitz_framebuffer_t          *framebuffer)
+{
+    gl->delete_framebuffers (1, &framebuffer->name);
+}
+
+void
+glitz_framebuffer_unbind (glitz_gl_proc_address_list_t *gl)
+{
+    gl->bind_framebuffer (GLITZ_GL_FRAMEBUFFER, 0);
+}
+
+glitz_bool_t
+glitz_framebuffer_complete (glitz_gl_proc_address_list_t *gl,
+                            glitz_framebuffer_t          *framebuffer,
+                            glitz_texture_t              *texture)
+{   
+    if (!framebuffer->name)
+    {
+        if (!TEXTURE_ALLOCATED (texture))
+            glitz_texture_allocate (gl, texture);
+        
+        gl->gen_framebuffers (1, &framebuffer->name);
+        gl->bind_framebuffer (GLITZ_GL_FRAMEBUFFER, framebuffer->name);
+    
+        gl->framebuffer_texture_2d (GLITZ_GL_FRAMEBUFFER,
+                                    GLITZ_GL_COLOR_ATTACHMENT0,
+                                    GLITZ_GL_TEXTURE_2D, texture->name,
+                                    0);
+    }
+    else
+        gl->bind_framebuffer (GLITZ_GL_FRAMEBUFFER, framebuffer->name);
+
+    return (gl->check_framebuffer_status (GLITZ_GL_FRAMEBUFFER) ==
+            GLITZ_GL_FRAMEBUFFER_COMPLETE);
+}