1/****************************************************************************
2 * Copyright (C) 2015 Intel Corporation.   All Rights Reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 ***************************************************************************/
23
24#ifndef SWR_SCRATCH_H
25#define SWR_SCRATCH_H
26
27struct swr_scratch_space {
28   void *head;
29   unsigned int current_size;
30   /* TODO XXX: Add a fence for wrap condition. */
31
32   void *base;
33};
34
35struct swr_scratch_buffers {
36   struct swr_scratch_space vs_constants;
37   struct swr_scratch_space fs_constants;
38   struct swr_scratch_space gs_constants;
39   struct swr_scratch_space vertex_buffer;
40   struct swr_scratch_space index_buffer;
41};
42
43
44/*
45 * swr_copy_to_scratch_space
46 * Copies size bytes of user_buffer into the scratch ring buffer.
47 * Used to store temporary data such as client arrays and constants.
48 *
49 * Inputs:
50 *   space ptr to scratch pool (vs_constants, fs_constants)
51 *   user_buffer, data to copy into scratch space
52 *   size to be copied
53 * Returns:
54 *   pointer to data copied to scratch space.
55 */
56void *swr_copy_to_scratch_space(struct swr_context *ctx,
57                                struct swr_scratch_space *space,
58                                const void *user_buffer,
59                                unsigned int size);
60
61void swr_init_scratch_buffers(struct swr_context *ctx);
62void swr_destroy_scratch_buffers(struct swr_context *ctx);
63
64#endif
65