1 /*
2 * Copyright © 2014-2017 Broadcom
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 /**
25 * @file vc5_formats.c
26 *
27 * Contains the table and accessors for VC5 texture and render target format
28 * support.
29 *
30 * The hardware has limited support for texture formats, and extremely limited
31 * support for render target formats. As a result, we emulate other formats
32 * in our shader code, and this stores the table for doing so.
33 */
34
35 #include "util/macros.h"
36
37 #include "vc5_context.h"
38 #include "vc5_format_table.h"
39
40 static const struct vc5_format *
get_format(const struct v3d_device_info * devinfo,enum pipe_format f)41 get_format(const struct v3d_device_info *devinfo, enum pipe_format f)
42 {
43 if (devinfo->ver >= 41)
44 return v3d41_get_format_desc(f);
45 else
46 return v3d33_get_format_desc(f);
47 }
48
49 bool
vc5_rt_format_supported(const struct v3d_device_info * devinfo,enum pipe_format f)50 vc5_rt_format_supported(const struct v3d_device_info *devinfo,
51 enum pipe_format f)
52 {
53 const struct vc5_format *vf = get_format(devinfo, f);
54
55 if (!vf)
56 return false;
57
58 return vf->rt_type != V3D_OUTPUT_IMAGE_FORMAT_NO;
59 }
60
61 uint8_t
vc5_get_rt_format(const struct v3d_device_info * devinfo,enum pipe_format f)62 vc5_get_rt_format(const struct v3d_device_info *devinfo, enum pipe_format f)
63 {
64 const struct vc5_format *vf = get_format(devinfo, f);
65
66 if (!vf)
67 return 0;
68
69 return vf->rt_type;
70 }
71
72 bool
vc5_tex_format_supported(const struct v3d_device_info * devinfo,enum pipe_format f)73 vc5_tex_format_supported(const struct v3d_device_info *devinfo,
74 enum pipe_format f)
75 {
76 const struct vc5_format *vf = get_format(devinfo, f);
77
78 return vf != NULL;
79 }
80
81 uint8_t
vc5_get_tex_format(const struct v3d_device_info * devinfo,enum pipe_format f)82 vc5_get_tex_format(const struct v3d_device_info *devinfo, enum pipe_format f)
83 {
84 const struct vc5_format *vf = get_format(devinfo, f);
85
86 if (!vf)
87 return 0;
88
89 return vf->tex_type;
90 }
91
92 uint8_t
vc5_get_tex_return_size(const struct v3d_device_info * devinfo,enum pipe_format f,enum pipe_tex_compare compare)93 vc5_get_tex_return_size(const struct v3d_device_info *devinfo,
94 enum pipe_format f, enum pipe_tex_compare compare)
95 {
96 const struct vc5_format *vf = get_format(devinfo, f);
97
98 if (!vf)
99 return 0;
100
101 if (compare == PIPE_TEX_COMPARE_R_TO_TEXTURE)
102 return 16;
103
104 return vf->return_size;
105 }
106
107 uint8_t
vc5_get_tex_return_channels(const struct v3d_device_info * devinfo,enum pipe_format f)108 vc5_get_tex_return_channels(const struct v3d_device_info *devinfo,
109 enum pipe_format f)
110 {
111 const struct vc5_format *vf = get_format(devinfo, f);
112
113 if (!vf)
114 return 0;
115
116 return vf->return_channels;
117 }
118
119 const uint8_t *
vc5_get_format_swizzle(const struct v3d_device_info * devinfo,enum pipe_format f)120 vc5_get_format_swizzle(const struct v3d_device_info *devinfo, enum pipe_format f)
121 {
122 const struct vc5_format *vf = get_format(devinfo, f);
123 static const uint8_t fallback[] = {0, 1, 2, 3};
124
125 if (!vf)
126 return fallback;
127
128 return vf->swizzle;
129 }
130
131 void
vc5_get_internal_type_bpp_for_output_format(const struct v3d_device_info * devinfo,uint32_t format,uint32_t * type,uint32_t * bpp)132 vc5_get_internal_type_bpp_for_output_format(const struct v3d_device_info *devinfo,
133 uint32_t format,
134 uint32_t *type,
135 uint32_t *bpp)
136 {
137 if (devinfo->ver >= 41) {
138 return v3d41_get_internal_type_bpp_for_output_format(format,
139 type, bpp);
140 } else {
141 return v3d33_get_internal_type_bpp_for_output_format(format,
142 type, bpp);
143 }
144 }
145