1/*
2 * Copyright 2016 Advanced Micro Devices, Inc.
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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24#ifndef ST_PBO_H
25#define ST_PBO_H
26
27struct gl_pixelstore_attrib;
28
29struct st_context;
30
31struct st_pbo_addresses {
32   int xoffset;
33   int yoffset;
34   unsigned width;
35   unsigned height;
36   unsigned depth;
37
38   unsigned bytes_per_pixel;
39
40   /* Everything below is filled in by st_pbo_from_pixelstore */
41   unsigned pixels_per_row;
42   unsigned image_height;
43
44   /* Everything below is filled in by st_pbo_setup_buffer */
45
46   /* Buffer and view. */
47   struct pipe_resource *buffer; /* non-owning pointer */
48   unsigned first_element;
49   unsigned last_element;
50
51   /* Constant buffer for the fragment shader. */
52   struct {
53      int32_t xoffset;
54      int32_t yoffset;
55      int32_t stride;
56      int32_t image_size;
57      int32_t layer_offset;
58   } constants;
59};
60
61bool
62st_pbo_addresses_setup(struct st_context *st,
63                       struct pipe_resource *buf, intptr_t buf_offset,
64                       struct st_pbo_addresses *addr);
65
66bool
67st_pbo_addresses_pixelstore(struct st_context *st,
68                            GLenum gl_target, bool skip_images,
69                            const struct gl_pixelstore_attrib *store,
70                            const void *pixels,
71                            struct st_pbo_addresses *addr);
72
73void
74st_pbo_addresses_invert_y(struct st_pbo_addresses *addr,
75                          unsigned viewport_height);
76
77bool
78st_pbo_draw(struct st_context *st, const struct st_pbo_addresses *addr,
79            unsigned surface_width, unsigned surface_height);
80
81void *
82st_pbo_create_vs(struct st_context *st);
83
84void *
85st_pbo_create_gs(struct st_context *st);
86
87void *
88st_pbo_get_upload_fs(struct st_context *st,
89                     enum pipe_format src_format,
90                     enum pipe_format dst_format);
91
92void *
93st_pbo_get_download_fs(struct st_context *st, enum pipe_texture_target target,
94                       enum pipe_format src_format,
95                       enum pipe_format dst_format);
96
97extern void
98st_init_pbo_helpers(struct st_context *st);
99
100extern void
101st_destroy_pbo_helpers(struct st_context *st);
102
103#endif /* ST_PBO_H */
104