2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * 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 mtx_init(&rb
->Mutex
, mtx_plain
);
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
;
56 rb
->InternalFormat
= GL_RGBA
;
57 rb
->Format
= MESA_FORMAT_NONE
;
62 * Allocate a new gl_renderbuffer object. This can be used for user-created
63 * renderbuffers or window-system renderbuffers.
65 struct gl_renderbuffer
*
66 _mesa_new_renderbuffer(struct gl_context
*ctx
, GLuint name
)
68 struct gl_renderbuffer
*rb
= CALLOC_STRUCT(gl_renderbuffer
);
70 _mesa_init_renderbuffer(rb
, name
);
77 * Delete a gl_framebuffer.
78 * This is the default function for renderbuffer->Delete().
79 * Drivers which subclass gl_renderbuffer should probably implement their
80 * own delete function. But the driver might also call this function to
81 * free the object in the end.
84 _mesa_delete_renderbuffer(struct gl_context
*ctx
, struct gl_renderbuffer
*rb
)
86 mtx_destroy(&rb
->Mutex
);
93 * Attach a renderbuffer to a framebuffer.
94 * \param bufferName one of the BUFFER_x tokens
97 _mesa_add_renderbuffer(struct gl_framebuffer
*fb
,
98 gl_buffer_index bufferName
, struct gl_renderbuffer
*rb
)
102 assert(bufferName
< BUFFER_COUNT
);
104 /* There should be no previous renderbuffer on this attachment point,
105 * with the exception of depth/stencil since the same renderbuffer may
108 assert(bufferName
== BUFFER_DEPTH
||
109 bufferName
== BUFFER_STENCIL
||
110 fb
->Attachment
[bufferName
].Renderbuffer
== NULL
);
112 /* winsys vs. user-created buffer cross check */
113 if (_mesa_is_user_fbo(fb
)) {
120 fb
->Attachment
[bufferName
].Type
= GL_RENDERBUFFER_EXT
;
121 fb
->Attachment
[bufferName
].Complete
= GL_TRUE
;
122 _mesa_reference_renderbuffer(&fb
->Attachment
[bufferName
].Renderbuffer
, rb
);
127 * Remove the named renderbuffer from the given framebuffer.
128 * \param bufferName one of the BUFFER_x tokens
131 _mesa_remove_renderbuffer(struct gl_framebuffer
*fb
,
132 gl_buffer_index bufferName
)
134 assert(bufferName
< BUFFER_COUNT
);
135 _mesa_reference_renderbuffer(&fb
->Attachment
[bufferName
].Renderbuffer
,
141 * Set *ptr to point to rb. If *ptr points to another renderbuffer,
142 * dereference that buffer first. The new renderbuffer's refcount will
143 * be incremented. The old renderbuffer's refcount will be decremented.
144 * This is normally only called from the _mesa_reference_renderbuffer() macro
145 * when there's a real pointer change.
148 _mesa_reference_renderbuffer_(struct gl_renderbuffer
**ptr
,
149 struct gl_renderbuffer
*rb
)
152 /* Unreference the old renderbuffer */
153 GLboolean deleteFlag
= GL_FALSE
;
154 struct gl_renderbuffer
*oldRb
= *ptr
;
156 mtx_lock(&oldRb
->Mutex
);
157 ASSERT(oldRb
->RefCount
> 0);
159 /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/
160 deleteFlag
= (oldRb
->RefCount
== 0);
161 mtx_unlock(&oldRb
->Mutex
);
164 GET_CURRENT_CONTEXT(ctx
);
165 oldRb
->Delete(ctx
, oldRb
);
173 /* reference new renderbuffer */
174 mtx_lock(&rb
->Mutex
);
176 /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/
177 mtx_unlock(&rb
->Mutex
);