1/**************************************************************************
2 *
3 * Copyright 2006 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  * Authors:
29  *   Keith Whitwell <keithw@vmware.com>
30  *   Michel Dänzer <daenzer@vmware.com>
31  */
32
33#include "pipe/p_context.h"
34#include "pipe/p_defines.h"
35#include "util/u_inlines.h"
36#include "util/u_math.h"
37#include "util/u_memory.h"
38
39#include "i915_context.h"
40#include "i915_resource.h"
41
42
43
44static boolean
45i915_buffer_get_handle(struct pipe_screen *screen,
46		       struct pipe_resource *resource,
47		       struct winsys_handle *handle)
48{
49   return FALSE;
50}
51
52static void
53i915_buffer_destroy(struct pipe_screen *screen,
54		    struct pipe_resource *resource)
55{
56   struct i915_buffer *buffer = i915_buffer(resource);
57   if (buffer->free_on_destroy)
58      align_free(buffer->data);
59   FREE(buffer);
60}
61
62
63static void *
64i915_buffer_transfer_map(struct pipe_context *pipe,
65                         struct pipe_resource *resource,
66                         unsigned level,
67                         unsigned usage,
68                         const struct pipe_box *box,
69                         struct pipe_transfer **ptransfer)
70{
71   struct i915_context *i915 = i915_context(pipe);
72   struct i915_buffer *buffer = i915_buffer(resource);
73   struct pipe_transfer *transfer = slab_alloc_st(&i915->transfer_pool);
74
75   if (!transfer)
76      return NULL;
77
78   transfer->resource = resource;
79   transfer->level = level;
80   transfer->usage = usage;
81   transfer->box = *box;
82   *ptransfer = transfer;
83
84   return buffer->data + transfer->box.x;
85}
86
87static void
88i915_buffer_transfer_unmap(struct pipe_context *pipe,
89                           struct pipe_transfer *transfer)
90{
91   struct i915_context *i915 = i915_context(pipe);
92   slab_free_st(&i915->transfer_pool, transfer);
93}
94
95void
96i915_buffer_subdata(struct pipe_context *rm_ctx,
97                    struct pipe_resource *resource,
98                    unsigned usage, unsigned offset,
99                    unsigned size, const void *data)
100{
101   struct i915_buffer *buffer = i915_buffer(resource);
102
103   memcpy(buffer->data + offset, data, size);
104}
105
106
107struct u_resource_vtbl i915_buffer_vtbl =
108{
109   i915_buffer_get_handle,	     /* get_handle */
110   i915_buffer_destroy,		     /* resource_destroy */
111   i915_buffer_transfer_map,	     /* transfer_map */
112   u_default_transfer_flush_region,  /* transfer_flush_region */
113   i915_buffer_transfer_unmap,	     /* transfer_unmap */
114};
115
116
117
118struct pipe_resource *
119i915_buffer_create(struct pipe_screen *screen,
120                    const struct pipe_resource *template)
121{
122   struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
123
124   if (!buf)
125      return NULL;
126
127   buf->b.b = *template;
128   buf->b.vtbl = &i915_buffer_vtbl;
129   pipe_reference_init(&buf->b.b.reference, 1);
130   buf->b.b.screen = screen;
131   buf->data = align_malloc(template->width0, 64);
132   buf->free_on_destroy = TRUE;
133
134   if (!buf->data)
135      goto err;
136
137   return &buf->b.b;
138
139err:
140   FREE(buf);
141   return NULL;
142}
143
144
145
146struct pipe_resource *
147i915_user_buffer_create(struct pipe_screen *screen,
148                        void *ptr,
149                        unsigned bytes,
150                        unsigned bind)
151{
152   struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
153
154   if (!buf)
155      return NULL;
156
157   pipe_reference_init(&buf->b.b.reference, 1);
158   buf->b.vtbl = &i915_buffer_vtbl;
159   buf->b.b.screen = screen;
160   buf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
161   buf->b.b.usage = PIPE_USAGE_IMMUTABLE;
162   buf->b.b.bind = bind;
163   buf->b.b.flags = 0;
164   buf->b.b.width0 = bytes;
165   buf->b.b.height0 = 1;
166   buf->b.b.depth0 = 1;
167   buf->b.b.array_size = 1;
168
169   buf->data = ptr;
170   buf->free_on_destroy = FALSE;
171
172   return &buf->b.b;
173}
174