Merge remote branch 'origin/master' into gallium_draw_llvm
[mesa.git] / src / gallium / drivers / llvmpipe / lp_buffer.c
1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29 #include "util/u_inlines.h"
30 #include "util/u_memory.h"
31 #include "util/u_math.h"
32
33 #include "lp_screen.h"
34 #include "lp_buffer.h"
35
36
37 static void *
38 llvmpipe_buffer_map(struct pipe_screen *screen,
39 struct pipe_buffer *buf,
40 unsigned flags)
41 {
42 struct llvmpipe_buffer *llvmpipe_buf = llvmpipe_buffer(buf);
43 return llvmpipe_buf->data;
44 }
45
46
47 static void
48 llvmpipe_buffer_unmap(struct pipe_screen *screen,
49 struct pipe_buffer *buf)
50 {
51 }
52
53
54 static void
55 llvmpipe_buffer_destroy(struct pipe_buffer *buf)
56 {
57 struct llvmpipe_buffer *sbuf = llvmpipe_buffer(buf);
58
59 if (!sbuf->userBuffer)
60 align_free(sbuf->data);
61
62 FREE(sbuf);
63 }
64
65
66 static struct pipe_buffer *
67 llvmpipe_buffer_create(struct pipe_screen *screen,
68 unsigned alignment,
69 unsigned usage,
70 unsigned size)
71 {
72 struct llvmpipe_buffer *buffer = CALLOC_STRUCT(llvmpipe_buffer);
73
74 pipe_reference_init(&buffer->base.reference, 1);
75 buffer->base.screen = screen;
76 buffer->base.alignment = MAX2(alignment, 16);
77 buffer->base.usage = usage;
78 buffer->base.size = size;
79
80 buffer->data = align_malloc(size, alignment);
81
82 return &buffer->base;
83 }
84
85
86 /**
87 * Create buffer which wraps user-space data.
88 */
89 static struct pipe_buffer *
90 llvmpipe_user_buffer_create(struct pipe_screen *screen,
91 void *ptr,
92 unsigned bytes)
93 {
94 struct llvmpipe_buffer *buffer;
95
96 buffer = CALLOC_STRUCT(llvmpipe_buffer);
97 if(!buffer)
98 return NULL;
99
100 pipe_reference_init(&buffer->base.reference, 1);
101 buffer->base.screen = screen;
102 buffer->base.size = bytes;
103 buffer->userBuffer = TRUE;
104 buffer->data = ptr;
105
106 return &buffer->base;
107 }
108
109
110 void
111 llvmpipe_init_screen_buffer_funcs(struct pipe_screen *screen)
112 {
113 screen->buffer_create = llvmpipe_buffer_create;
114 screen->user_buffer_create = llvmpipe_user_buffer_create;
115 screen->buffer_map = llvmpipe_buffer_map;
116 screen->buffer_unmap = llvmpipe_buffer_unmap;
117 screen->buffer_destroy = llvmpipe_buffer_destroy;
118 }