2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 #include "renderbuffer.h"
36 * Initialize the fields of a gl_renderbuffer to default values.
39 _mesa_init_renderbuffer(struct gl_renderbuffer
*rb
, GLuint name
)
41 _glthread_INIT_MUTEX(rb
->Mutex
);
46 rb
->Delete
= _mesa_delete_renderbuffer
;
48 /* The rest of these should be set later by the caller of this function or
49 * the AllocStorage method:
51 rb
->AllocStorage
= NULL
;
55 rb
->InternalFormat
= GL_RGBA
;
56 rb
->Format
= MESA_FORMAT_NONE
;
61 * Allocate a new gl_renderbuffer object. This can be used for user-created
62 * renderbuffers or window-system renderbuffers.
64 struct gl_renderbuffer
*
65 _mesa_new_renderbuffer(struct gl_context
*ctx
, GLuint name
)
67 struct gl_renderbuffer
*rb
= CALLOC_STRUCT(gl_renderbuffer
);
69 _mesa_init_renderbuffer(rb
, name
);
76 * Delete a gl_framebuffer.
77 * This is the default function for renderbuffer->Delete().
78 * Drivers which subclass gl_renderbuffer should probably implement their
79 * own delete function. But the driver might also call this function to
80 * free the object in the end.
83 _mesa_delete_renderbuffer(struct gl_renderbuffer
*rb
)
85 _glthread_DESTROY_MUTEX(rb
->Mutex
);
91 * Attach a renderbuffer to a framebuffer.
92 * \param bufferName one of the BUFFER_x tokens
95 _mesa_add_renderbuffer(struct gl_framebuffer
*fb
,
96 gl_buffer_index bufferName
, struct gl_renderbuffer
*rb
)
100 assert(bufferName
< BUFFER_COUNT
);
102 /* There should be no previous renderbuffer on this attachment point,
103 * with the exception of depth/stencil since the same renderbuffer may
106 assert(bufferName
== BUFFER_DEPTH
||
107 bufferName
== BUFFER_STENCIL
||
108 fb
->Attachment
[bufferName
].Renderbuffer
== NULL
);
110 /* winsys vs. user-created buffer cross check */
111 if (_mesa_is_user_fbo(fb
)) {
118 fb
->Attachment
[bufferName
].Type
= GL_RENDERBUFFER_EXT
;
119 fb
->Attachment
[bufferName
].Complete
= GL_TRUE
;
120 _mesa_reference_renderbuffer(&fb
->Attachment
[bufferName
].Renderbuffer
, rb
);
125 * Remove the named renderbuffer from the given framebuffer.
126 * \param bufferName one of the BUFFER_x tokens
129 _mesa_remove_renderbuffer(struct gl_framebuffer
*fb
,
130 gl_buffer_index bufferName
)
132 assert(bufferName
< BUFFER_COUNT
);
133 _mesa_reference_renderbuffer(&fb
->Attachment
[bufferName
].Renderbuffer
,
139 * Set *ptr to point to rb. If *ptr points to another renderbuffer,
140 * dereference that buffer first. The new renderbuffer's refcount will
141 * be incremented. The old renderbuffer's refcount will be decremented.
142 * This is normally only called from the _mesa_reference_renderbuffer() macro
143 * when there's a real pointer change.
146 _mesa_reference_renderbuffer_(struct gl_renderbuffer
**ptr
,
147 struct gl_renderbuffer
*rb
)
150 /* Unreference the old renderbuffer */
151 GLboolean deleteFlag
= GL_FALSE
;
152 struct gl_renderbuffer
*oldRb
= *ptr
;
154 _glthread_LOCK_MUTEX(oldRb
->Mutex
);
155 ASSERT(oldRb
->RefCount
> 0);
157 /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/
158 deleteFlag
= (oldRb
->RefCount
== 0);
159 _glthread_UNLOCK_MUTEX(oldRb
->Mutex
);
162 oldRb
->Delete(oldRb
);
170 /* reference new renderbuffer */
171 _glthread_LOCK_MUTEX(rb
->Mutex
);
173 /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/
174 _glthread_UNLOCK_MUTEX(rb
->Mutex
);