mesa: remove gl_renderbuffer::DataType
[mesa.git] / src / mesa / main / renderbuffer.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.5
4 *
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
6 *
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:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
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.
23 */
24
25
26 #include "glheader.h"
27 #include "imports.h"
28 #include "context.h"
29 #include "fbobject.h"
30 #include "formats.h"
31 #include "mtypes.h"
32 #include "renderbuffer.h"
33
34
35 /**
36 * Initialize the fields of a gl_renderbuffer to default values.
37 */
38 void
39 _mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name)
40 {
41 _glthread_INIT_MUTEX(rb->Mutex);
42
43 rb->ClassID = 0;
44 rb->Name = name;
45 rb->RefCount = 0;
46 rb->Delete = _mesa_delete_renderbuffer;
47
48 /* The rest of these should be set later by the caller of this function or
49 * the AllocStorage method:
50 */
51 rb->AllocStorage = NULL;
52
53 rb->Width = 0;
54 rb->Height = 0;
55 rb->InternalFormat = GL_RGBA;
56 rb->Format = MESA_FORMAT_NONE;
57
58 rb->Data = NULL;
59
60 /* Point back to ourself so that we don't have to check for Wrapped==NULL
61 * all over the drivers.
62 */
63 rb->Wrapped = rb;
64 }
65
66
67 /**
68 * Allocate a new gl_renderbuffer object. This can be used for user-created
69 * renderbuffers or window-system renderbuffers.
70 */
71 struct gl_renderbuffer *
72 _mesa_new_renderbuffer(struct gl_context *ctx, GLuint name)
73 {
74 struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer);
75 if (rb) {
76 _mesa_init_renderbuffer(rb, name);
77 }
78 return rb;
79 }
80
81
82 /**
83 * Delete a gl_framebuffer.
84 * This is the default function for renderbuffer->Delete().
85 */
86 void
87 _mesa_delete_renderbuffer(struct gl_renderbuffer *rb)
88 {
89 if (rb->Data) {
90 free(rb->Data);
91 }
92 free(rb);
93 }
94
95
96 /**
97 * Attach a renderbuffer to a framebuffer.
98 * \param bufferName one of the BUFFER_x tokens
99 */
100 void
101 _mesa_add_renderbuffer(struct gl_framebuffer *fb,
102 gl_buffer_index bufferName, struct gl_renderbuffer *rb)
103 {
104 assert(fb);
105 assert(rb);
106 assert(bufferName < BUFFER_COUNT);
107
108 /* There should be no previous renderbuffer on this attachment point,
109 * with the exception of depth/stencil since the same renderbuffer may
110 * be used for both.
111 */
112 assert(bufferName == BUFFER_DEPTH ||
113 bufferName == BUFFER_STENCIL ||
114 fb->Attachment[bufferName].Renderbuffer == NULL);
115
116 /* winsys vs. user-created buffer cross check */
117 if (_mesa_is_user_fbo(fb)) {
118 assert(rb->Name);
119 }
120 else {
121 assert(!rb->Name);
122 }
123
124 fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT;
125 fb->Attachment[bufferName].Complete = GL_TRUE;
126 _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb);
127 }
128
129
130 /**
131 * Remove the named renderbuffer from the given framebuffer.
132 * \param bufferName one of the BUFFER_x tokens
133 */
134 void
135 _mesa_remove_renderbuffer(struct gl_framebuffer *fb,
136 gl_buffer_index bufferName)
137 {
138 assert(bufferName < BUFFER_COUNT);
139 _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer,
140 NULL);
141 }
142
143
144 /**
145 * Set *ptr to point to rb. If *ptr points to another renderbuffer,
146 * dereference that buffer first. The new renderbuffer's refcount will
147 * be incremented. The old renderbuffer's refcount will be decremented.
148 * This is normally only called from the _mesa_reference_renderbuffer() macro
149 * when there's a real pointer change.
150 */
151 void
152 _mesa_reference_renderbuffer_(struct gl_renderbuffer **ptr,
153 struct gl_renderbuffer *rb)
154 {
155 if (*ptr) {
156 /* Unreference the old renderbuffer */
157 GLboolean deleteFlag = GL_FALSE;
158 struct gl_renderbuffer *oldRb = *ptr;
159
160 _glthread_LOCK_MUTEX(oldRb->Mutex);
161 ASSERT(oldRb->RefCount > 0);
162 oldRb->RefCount--;
163 /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/
164 deleteFlag = (oldRb->RefCount == 0);
165 _glthread_UNLOCK_MUTEX(oldRb->Mutex);
166
167 if (deleteFlag) {
168 oldRb->Delete(oldRb);
169 }
170
171 *ptr = NULL;
172 }
173 assert(!*ptr);
174
175 if (rb) {
176 /* reference new renderbuffer */
177 _glthread_LOCK_MUTEX(rb->Mutex);
178 rb->RefCount++;
179 /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/
180 _glthread_UNLOCK_MUTEX(rb->Mutex);
181 *ptr = rb;
182 }
183 }