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 
27 struct gl_pixelstore_attrib;
28 
29 struct st_context;
30 
31 struct 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 
61 bool
62 st_pbo_addresses_setup(struct st_context *st,
63                        struct pipe_resource *buf, intptr_t buf_offset,
64                        struct st_pbo_addresses *addr);
65 
66 bool
67 st_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 
73 void
74 st_pbo_addresses_invert_y(struct st_pbo_addresses *addr,
75                           unsigned viewport_height);
76 
77 bool
78 st_pbo_draw(struct st_context *st, const struct st_pbo_addresses *addr,
79             unsigned surface_width, unsigned surface_height);
80 
81 void *
82 st_pbo_create_vs(struct st_context *st);
83 
84 void *
85 st_pbo_create_gs(struct st_context *st);
86 
87 void *
88 st_pbo_get_upload_fs(struct st_context *st,
89                      enum pipe_format src_format,
90                      enum pipe_format dst_format,
91                      bool need_layer);
92 
93 void *
94 st_pbo_get_download_fs(struct st_context *st, enum pipe_texture_target target,
95                        enum pipe_format src_format,
96                        enum pipe_format dst_format,
97                        bool need_layer);
98 
99 extern void
100 st_init_pbo_helpers(struct st_context *st);
101 
102 extern void
103 st_destroy_pbo_helpers(struct st_context *st);
104 
105 #endif /* ST_PBO_H */
106